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JP2005286903

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DESCRIPTION JP2005286903
PROBLEM TO BE SOLVED: To easily reproduce an optimum sound field without performing
complicated work even when the position of a listening point or the arrangement position of a
sound source is changed. SOLUTION: A setting state table TBL2 in which various parameters
necessary when the audio processing unit 4 performs signal processing on audio data
corresponding to each channel is stored in a recording unit 6 and setting screen data are
recorded. There is. The setting screen data is linked to the setting state table TBL2, and the
setting state table TBL2 is updated according to the change made on the setting screen. As a
result, a change is added to the parameter when performing signal processing on audio data in
the audio processing unit 4. [Selected figure] Figure 1
Sound reproduction apparatus, sound reproduction system, sound reproduction method and
control program, and information recording medium recording the program
[0001]
The present application relates to an audio reproduction apparatus provided with a plurality of
sound sources, and more particularly to a setting method of the audio reproduction apparatus
when reproducing an audio signal.
[0002]
In recent years, along with the increase in capacity of recording media such as DVDs, various
types of audio reproduction apparatuses have been provided which reproduce audio data of a
plurality of channels (hereinafter abbreviated as "ch") like an AV amplifier.
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In this type of sound reproduction apparatus, it is desirable to localize the sound image to be
reproduced to a listener's listening position (hereinafter referred to as "listening point") and to
appropriately reproduce the sound field. Therefore, this type of sound reproducing apparatus is
provided with a function of changing the output timing and volume of the sound output from
each speaker based on the distance from the speaker to the listening point. Here, the following is
proposed as a method of determining parameters such as output timing in the conventional
sound reproducing apparatus. <Method 1> The distance from the new listening point to the
speaker is input on the setting screen, and parameters such as output timing are determined
according to the setting value. <Method 2> For example, pink noise or white noise is output as a
signal sound for measurement from each speaker, and parameters such as output timing are
calculated from detection results of measurement signals in a microphone disposed at a listening
point. (Refer to Patent Document 1) JP-A-2002-330499
[0003]
By the way, when the user cleans the room in which the sound reproduction apparatus is
installed, there is a scene where the arrangement position of the sofa, which has been the
listening point, is changed or the arrangement position of the speaker is changed. Many things
can happen. In such a case, in order to reproduce an optimal sound field, it is necessary to
change the parameters such as the output timing according to the distance between the new
listening point and the sound source. However, in the conventional setting method shown in the
above method 1, it is necessary to measure the distance from each speaker to the listening point,
for example, with a tape measure, and to input the measurement result on the setting screen. For
this reason, if the same operation is performed each time the listening point or the like is
changed due to the above-mentioned circumstances, the complexity is not tolerated. On the other
hand, in the case of the method 2, since there is no need to measure the distance by a tape
measure, it is possible to eliminate the complexity. However, according to this method 2, the
detection result is changed due to the ambient noise, so when the sound reproduction device is
installed in an environment such as a living room where noise is likely to occur due to people
coming and going, make settings. There are also limited opportunities for Therefore, in the case
of the method 2, it has been difficult to change the setting one by one in accordance with the
change of the listening point. The present application has been made in view of the abovedescribed circumstances, and as an example of the problem, even if the position of the listening
point or the arrangement position of the speaker is changed, the operation is simplified without
performing complicated operations. It is an object of the present invention to provide an acoustic
reproduction device, an acoustic reproduction system, an acoustic reproduction method, a
control program, and an information recording medium recording the program, capable of
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reproducing an optimal sound field.
[0004]
In order to solve the problems described above, according to one aspect of the present invention,
the sound reproducing apparatus according to claim 1 causes speakers corresponding to the
respective sound signals to be loudened based on a plurality of sound signals, respectively, to the
listener. A sound reproducing apparatus for providing a sound field space having a sense of
reality, a screen for displaying a virtual space in which the sound field space is reproduced, the
listening position of the listener in the sound field space, and the speakers A display control
means for displaying on the display means a setting screen on which a selected image is drawn at
a position corresponding to the arrangement position of the display, and changing the setting
screen according to an input operation performed by the user based on the setting screen;
Recognition means for recognizing a setting state of each speaker in the virtual space and a
setting state of the listening position on the basis of the setting screen; and in the sound field
space on the basis of the recognition result. Calculating means for calculating an actual distance
between each of the speakers and the listening position, and sound processing means for
performing signal processing on the sound signal corresponding to the calculated distance. I
assume.
[0005]
Further, according to another aspect of the present invention, in the sound reproduction system
according to claim 10, the plurality of speakers and the speakers corresponding to the respective
sound signals are expanded based on the plurality of sound signals, respectively, to the listener. A
sound reproducing system for providing a sound space having a sense of reality, wherein the
sound reproducing device is a screen for displaying a virtual space in which the sound space is
reproduced, and the sound field The display means displays the setting screen on which the
selected image is drawn at the position corresponding to the listening position of the listener in
the space and the arrangement position of each of the speakers, and according to the input
operation performed by the user based on the setting screen. Display control means for changing
the setting screen, and recognizing the setting state of each speaker in the virtual space and the
setting state of the listening position based on the setting screen Calculating means for
calculating an actual distance between each of the speakers and the listening position in the
sound field space based on the recognition result, and the signal processing corresponding to the
calculated distance as the acoustic signal And voice processing means for performing the
process.
[0006]
Still further, according to another aspect of the present invention, the sound reproduction system
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according to claim 11 causes the listener to expand the plurality of speakers and the speakers
corresponding to the respective sound signals based on the plurality of sound signals. In the
sound reproduction system provided with an acoustic reproduction device for providing a
realistic sound field space and an information processing device for executing various signal
processing, the information processing device reproduces the sound field space A display screen
for displaying a virtual space, displaying on the display means a setting screen on which a
selected image is drawn at a position corresponding to the listening position of the listener in the
sound field space and the arrangement position of each speaker Display control means for
changing the setting screen according to an input operation performed by the user based on the
setting screen, and setting of each of the speakers in the virtual space based on the setting screen
The recognition means for recognizing the setting state of the state and the listening position; the
calculating means for calculating the actual distance between each of the speakers in the sound
space and the listening position based on the recognition result; And control means for
controlling the sound reproduction device according to the result, the sound reproduction device
converting the sound signal to the signal processing corresponding to the calculated distance
under the control of the information processing device. It is characterized in that it comprises
voice processing means for performing.
[0007]
Further, according to another aspect of the present invention, in the sound reproduction method
according to claim 12, the plurality of speakers and the speakers corresponding to the respective
sound signals are respectively amplified based on the plurality of sound signals to the listener. A
sound reproducing device for providing a sound space having a sense of reality, and a screen for
displaying a virtual space in which the sound space is reproduced by the sound reproducing
device. A first step of causing the display means to display a setting screen on which a selected
image is drawn at a position corresponding to the listening position of the listener and the
arrangement position of each of the speakers in the sound field space; A second step of changing
the setting screen in accordance with an input operation performed by the user based on the
setting screen; and the sound reproducing apparatus executing the setting screen on the basis of
the setting screen. A third step of recognizing a setting state of a speaker and a setting state of
the listening position; and an actual distance between the speakers and the listening position in
the sound field space by the sound reproducing apparatus based on the recognition result And
the fifth step in which the sound reproduction apparatus performs signal processing
corresponding to the calculated distance on the sound signal.
[0008]
Furthermore, according to another aspect of the present invention, in the sound reproducing
method according to claim 13, a plurality of speakers and speakers corresponding to the
respective sound signals are amplified based on the plurality of sound signals, and the listener is
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A sound reproduction method in a sound reproduction system comprising: a sound reproduction
apparatus for providing a sound field space having a sense of reality; and an information
processing apparatus for executing various signal processing, wherein the information
processing apparatus is the sound field It is a screen for displaying a virtual space in which a
space is reproduced, and a setting screen on which a selected image is drawn at a position
corresponding to a listening position of a listener in the sound field space and an arrangement
position of each speaker An eleventh step of displaying, a twelfth step of changing the setting
screen according to an input operation performed by the user based on the setting screen, and
the information processing device being preceded by A thirteenth step of recognizing a setting
state of each speaker in the virtual space and a setting state of the listening position based on a
setting screen; and each information processing device in the sound field space based on the
recognition result A fourteenth step of calculating an actual distance between a speaker and the
listening position; a fifteenth step of controlling the sound reproduction device according to the
calculation result by the information processing device; and the sound reproduction device; The
signal processing apparatus may further include a sixteenth step of performing signal processing
corresponding to the calculated distance on the acoustic signal under control of the information
processing apparatus.
[0009]
Further, according to another aspect of the present invention, the control program according to
claim 14 causes the speakers corresponding to the respective sound signals to be loudened
based on a plurality of sound signals, and sounds having a sense of reality to the listener A
control program for controlling a sound reproduction device providing a field space by a
computer, the computer displaying a virtual space in which the sound field space is reproduced,
wherein the screen is displayed in the sound field space The setting screen on which the selected
image is drawn at the position corresponding to the listening position of the listener and the
arrangement position of each speaker is displayed on the display means, and the setting is
performed according to the input operation performed by the user based on the setting screen.
Display control means for changing a screen, and recognition based on the setting screen,
recognizing the setting state of each speaker in the virtual space and the setting state of the
listening position , Calculating means for calculating an actual distance between each of the
speakers in the sound field space and the listening position based on the recognition result, and
control means for controlling the sound reproducing apparatus according to the calculation
result It is characterized in that it functions as
[0010]
Still another aspect of the present invention is characterized in that the computer readable
information recording medium according to claim 15 has the control program according to claim
14 recorded therein.
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[0011]
Hereinafter, embodiments of the present application will be described with reference to the
drawings.
The embodiment does not limit the present invention, and can be arbitrarily changed within the
scope of the technical idea of the present application.
[0012]
[1] Embodiment [1.1] Outline of Embodiment (1) Configuration of Sound Reproduction System
According to Present Embodiment First, a sound reproduction system SY according to the
present embodiment will be described with reference to FIG.
Note that FIG. 1 shows a configuration example of the system S in the case where the sound
reproduction device A is an AV amplifier.
[0013]
As shown in the figure, the sound reproduction system SY according to this embodiment includes
a monitor MN for displaying various images, a media reproduction apparatus MP such as a DVD
recorder, a front light speaker FRS, a front left speaker FLS, and a center speaker. A CS, a
surround light speaker SRS, and a surround left speaker SLS (hereinafter, simply referred to as
“speaker S” when it is not necessary to specify each speaker S), a subwoofer SW, and a sound
reproduction device A are included.
[0014]
In the sound reproduction system SY according to the present embodiment, video data and audio
data read by the media reproduction device MP from a recording medium such as a DVD are
supplied to the sound reproduction device A.
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Then, the audio reproduction device A outputs the video data supplied by the media reproduction
device MP to the monitor MN, while performing the signal processing on the audio data and
outputs the audio data to each speaker S.
As a result of the signal processing performed by the sound reproducing apparatus A as
described above, the sound image is localized at the listening point, and the optimum sound field
is reproduced.
[0015]
In order to realize such functions, in the present embodiment, the audio reproduction apparatus
A includes an audio data input unit 1, a video data input unit 2, a selector 3, an audio processing
unit 4, a system control unit 5, and a recording unit 6. , Remote control light receiving unit 7,
instruction input unit 8, video processing unit 9, digital / analog conversion unit (hereinafter,
"digital / analog" is referred to as "D / A") 10, amplifier unit 11, and It has a data bus 12
interconnecting elements.
[0016]
For example, the system control unit 5 corresponds to the "recognition means" and the
"calculation means" in the "claims", and the "recording means" corresponds to the recording unit
6.
Also, for example, the “voice processing means” in the “claims” is realized by the system
control unit 5 and the voice processing unit 4 jointly, and the “display control means” is the
system control unit 5 and the video processing unit 9. Is realized by collaboration.
[0017]
First, the audio data input unit 1 and the video data input unit 2 have a plurality of digital signal
input terminals such as the D4 terminal, etc. Audio data input from the media reproduction
apparatus MP connected via these terminals And video data to the selector 3.
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Although it is optional how many audio data to be input to the audio data input unit 1 is input, in
the present embodiment, the front light (hereinafter "FR") and the front left (hereinafter 5.1ch
consisting of 5 channels of "FL", center (hereinafter "C"), surround light (hereinafter "SR") and
surround left (hereinafter "SL") and LFE (Low Frequency Effect) channel Description will be made
assuming that audio data is input.
[0018]
The selector 3 selects each data input to a plurality of terminals provided in the audio data input
unit 1 and the video data input unit 2 in accordance with the user's input operation, and the
selected data is processed as an audio processing unit 4 and the video processing unit 9.
[0019]
The remote control light receiving unit 7 is formed of, for example, a light receiving element,
receives a control signal transmitted by infrared light from a remote control device (not shown),
and outputs the received control signal to the data bus 12.
The instruction input unit 8 has various keys such as keys for selecting signals in the selector 3
and cursor keys, and transmits control signals corresponding to the user's input operation to the
system control unit 5 via the data bus 12. And output.
[0020]
The video processing unit 9 outputs the video data input from the selector 3 and the image data
output from the system control unit 5 via the data bus 12 to the monitor MN.
Note that whether or not to provide a decoder in the video processing unit 3 is optional, and it is
not always necessary to provide a decoder in the video processing unit 3 when the decoder is
mounted on the monitor MN.
[0021]
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8
The audio processing unit 4 has a DSP (Digital Signal Processor), and under the control of the
system control unit 5, performs various signal processing on the audio data input from the
selector 3 to the D / A conversion unit 10. And output.
At this time, the audio processing unit 4 performs separate signal processing for each audio data
corresponding to each channel, whereby the sound pressure level of the audio output from each
speaker S and the timing at which the audio is output from each speaker S Change the
characteristics of etc.
For example, when audio data of 5.1 ch is input as in the present embodiment, the audio
processing unit 4 executes signal processing to change characteristics such as output timing and
sound pressure for each ch of 5.1 ch. It is to do. The specific processing method in the DSP is the
same as that in the related art, so the details will be omitted. Further, since LFEch corresponding
to the subwoofer SW does not have directivity, in the present embodiment, the audio processing
unit 4 is described as not performing signal processing on audio data of the same channel.
[0022]
The D / A conversion unit 10 D / A converts audio data corresponding to each channel subjected
to signal processing by the audio processing unit 4 and outputs the converted data to the
amplifier unit 11. In the following, data output from the media reproduction apparatus MP and
before D / A conversion is referred to as audio data, and a signal obtained after D / A conversion
of the audio data is referred to as an audio signal.
[0023]
The amplifier unit 11 amplifies the audio signal input from the D / A conversion unit 10 and
outputs the amplified signal to the speaker S. The amplifier unit 11 has low frequency amplifiers
and output terminals in a number corresponding to the number of ch that can be output, and the
audio signal corresponding to each channel input from the D / A conversion unit 10 is connected
to the output terminal The signal is output to each speaker S. As a result, the audio signal
corresponding to each channel obtained by D / A converting the audio data corresponding to
each channel is output independently from each speaker S.
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[0024]
The recording unit 6 is composed of a non-volatile memory such as an EEPROM, and the
recording unit 6 includes a plurality of parameters shown in FIG. 2 along with various
information necessary for executing various processes in the sound reproducing apparatus A.
Tables TBL1-k (k = 1, 2,..., N) are stored.
[0025]
In FIG. 2, “DT”, “DB” and “F” respectively change the delay time parameter for changing
the timing of outputting the sound from the speaker S, the level parameter for changing the
sound pressure level, and the frequency characteristic It is a frequency characteristic parameter
to
Each of these parameters is stored in the table TBL1-k in association with the distance between
the listening point and the arrangement position of the speaker S, and the value necessary for
reproducing the optimal sound field at the distance is a priori. Calculated and stored.
[0026]
Here, depending on the model of the speaker S, there are differences in the characteristics such
as the available output frequency. For this reason, it is desirable that the parameters used when
the audio processing unit 4 performs various processing on audio data are changed according to
the model of the speaker S. Therefore, in the present embodiment, the parameter table TBL1-k is
provided for each model of the speaker S, and in each parameter table TBL1-k, the speaker model
name corresponding to the table TBL1-k is stored. .
[0027]
Note that it is optional whether or not parameters such as "DT" corresponding to all the channels
are stored in each parameter table TBL1-k. For example, depending on the type of the speaker S,
there are also speakers dedicated to the center, surround only, and front only. As described
above, it is not necessary to store parameters corresponding to all the channels for the parameter
table TBL1-k corresponding to the speaker of the model for which the channel is to be used, it is
not necessary to It is sufficient to store only the corresponding parameters.
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[0028]
Next, the system control unit 5 has, for example, a read only memory (ROM), a random access
memory (RAM), and a central processing unit (CPU), and executes the control program recorded
in the ROM to reproduce the sound. Control each part of the device A.
[0029]
The system control unit 5 executes the following processing.
(A) Initial setting process This process is performed when the system control unit 5 is powered
on in a state where the sound reproducing apparatus A is initialized, such as a state where power
is not yet turned on. Is the process to be performed. In this process, the system control unit 5
sets the size of the room in which the sound reproducing apparatus A is installed, the
arrangement position and model of each speaker S in the room, and the position of the listening
point, and these information are stored. The setting state table TBL2 (FIG. 3) is generated and
recorded in the recording unit 6. Further, at the time of generation of the table TBL2, the system
control unit 5 sets the three parameters “DT”, “DB”, and “F” appropriate for reproducing
the optimal sound field at the listening point to the parameter table TBL1. Extract these
parameters from -k and store these parameters in the setting state table TBL2.
[0030]
The parameters such as "DT" stored in the generated setting state table TBL2 in this manner are
used when the audio processing unit 4 performs signal processing on audio data corresponding
to each channel. Further, in the initial setting process, the system control unit 5 generates setting
screen data based on the generated setting state table TBL 2 and records the setting screen data
in the recording unit 6. The setting screen data is for displaying a sound field space, that is, a
virtual space that reproduces a space (room) where a listener listens to a sound output by the
speaker S, and the arrangement of the listening point and the speaker S The position is virtually
reproduced. The setting state table TBL2 and the setting screen data will be described in detail
later.
[0031]
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(B) Setting Change Processing This processing is processing executed by the system control unit
5 when changing the setting state of the sound reproduction device A. After the initial setting is
made, (1) when the arrangement position of the speakers S is changed, (2) when the listening
point is changed, it is necessary to change parameters such as “DT”. In addition, the user may
change the model of the speaker used (3), and it is necessary to change the above parameters.
The system control unit 5 reads the setting screen data recorded in the recording unit 6 when a
predetermined input operation is performed on the instruction input unit 8 or the remote control
device so as to correspond to the change of the state, and the setting screen While supplying
image data including data to the video processing unit 9, the setting screen as shown in FIG. 4 is
displayed on the monitor MN.
[0032]
Then, when the user performs an input operation in accordance with the setting screen displayed
on the monitor MN, the change state in the actual sound field space is calculated based on the
change state on the setting screen, and the setting state table TBL2 is updated. As a result, the
parameters when the audio processing unit 4 performs signal processing on the audio data
corresponding to each channel are changed, and the sound field optimum for the listening point
is reproduced in the positional relationship after the movement. .
[0033]
As described above, in the present embodiment, the setting screen data and the setting state
table TBL2 are linked, and the change content in the setting screen data is reflected in the setting
state table TBL2, so that the setting screen data is changed. The setting state table TBL2 is
updated, and it becomes possible to easily change the parameters when the signal processing is
performed in the audio processing unit 4.
[0034]
(2) Setting State Table TBL2 Here, the setting state table TBL2 for executing the above process
will be described in detail.
[0035]
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First, as shown in FIG. 3 described above, in the present embodiment, in the setting state table
TBL2, parameters “ll-1” and “ll-2” indicating the size of the room in which the sound
reproducing apparatus A is installed When there is no need to specify these, a field for storing
“l1” is provided, and parameters “l2-1” and “l2-2” indicating the arrangement position of
each speaker S are provided. Hereinafter, when there is no need to specify them in particular,
“l2” is stored.
The “l2-1” and “l2-2” respectively indicate the distance from the center of each speaker S to
the wall of the room, and “l2-1” is the distance in the back direction of the speaker S The
distance to the rear wall) and "l2-2" indicate the distance in the left side direction toward the
front of the speaker S (the distance to the wall in the left direction of the speaker as viewed from
the listener).
[0036]
Note that at the time of initial setting of the sound reproduction device A, it is optional how to set
the parameters “l1” and “l2”.
For example, the user may arbitrarily register. Also, for the parameter “l2”, a numerical value
conforming to the International Telecommunications Union-Radiocommunication Sector (ITU) -R
(BS) 75-1 may be calculated from the size of the room, and the value may be used. good.
[0037]
Further, in the setting state table TBL2, the three parameters “DT”, “DB” and “F” are
associated with the parameter “r” indicating the distance from the speaker S corresponding to
each channel to the listening point It is stored. These three parameters “DT”, “DB” and
“F” are extracted from the parameter table TBL1-k corresponding to the type of the speaker S
currently in use and stored, and the parameter table TBL1 It is a parameter such as "DT" stored
in association with the distance corresponding to the parameter "r" in -k.
[0038]
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When the audio processing unit 4 performs signal processing on audio data corresponding to
each channel, parameters such as "DT" stored in the setting state table TBL2 are used. As a result,
the optimum sound field for the listening point is reproduced. It should be noted that the method
of setting the parameter “r” at the time of initialization is arbitrary, and for example, the user
may arbitrarily register. However, in the present embodiment, in order to make the description
more specific, it is assumed that "r" is automatically set. Specifically, in the present embodiment,
under the control of the system control unit 5, the audio processing unit 4 outputs an impulse
signal for each channel in a state where a microphone is connected. Then, based on the voice
collected by the microphone, the delay time parameter “DT”, the level parameter “DB”, and
the frequency characteristic parameter “F” are calculated. Between the listening point and
each speaker S, the system control unit 5 reads the distance stored in the parameter table TBL1-k
in association with the parameters calculated by the voice processing unit and matching these
parameters. The distance of
[0039]
(3) Setting screen data Next, setting screen data will be described in detail. First, as shown in FIG.
4, a frame W is drawn on the setting screen displayed on the monitor MN based on the setting
screen data. The frame W indicates the internal space of the room in which the sound
reproducing apparatus A is installed, and has a value corresponding to the “I1” parameter
stored in the setting state table TBL2. When drawing the frame W, the system control unit 5
determines the size of the frame W based on the value of the parameter “I1” and the number
of displayable pixels of the monitor MN, and sets the coordinates in the frame W. Note that the
method by which the system control unit 5 sets the size and coordinates of the frame W is
arbitrary. However, in the present embodiment, the system control unit 5 is set by the following
method. That is, the system control unit 5 determines, for example, the number of pixels per
“0.1 m” (per unit length) from the number of displayable pixels of the monitor MN and the
parameter “I1”. For example, when the number of displayable pixels of the monitor MN is
“1024” in the horizontal direction and “768” in the vertical direction, “l1-1” = “3.6 m”,
“l1-2” = “2.7 m” If this is the case, “21” is the maximum value for the settable number of
pixels per “0.1 m”.
[0040]
In this case, in order to display the whole of the frame W on the monitor MN while displaying a
predetermined blank portion in the drawing range of the frame W, the number of pixels is about
15 pixels per unit length. Is desirable. Therefore, the system control unit 5 sets, for example,
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“15” as the number of pixels per unit length, and draws the frame W of “540” pixels in the
vertical direction and “405” pixels in the horizontal direction. In this manner, the system
control unit 5 divides the drawn frame W into vertical and horizontal directions for each unit
length, and coordinates the point of intersection of the axes dividing the frame W with the lower
left of the frame W as a zero point. Set (X, Y). For example, in the case of the above example, the
frame W is divided into "27" in the horizontal direction and "36" in the vertical direction, and the
coordinates are set from (0, 0) to (27, 36).
[0041]
Further, in the frame W, icons FRP, FLP, CP, SRP, and SLP (hereinafter referred to collectively as
“icon P” when it is not necessary to specify them) indicating the arrangement position of each
speaker S , And an icon L indicating a listening point is drawn. The icon P is drawn at a position
corresponding to the parameter "l2" of the setting state table TBL2. For example, when “l2-1”
= “0.3 m” and “l2-2” = “0.3 m” for the speaker FRS of “FR” ch, the system control unit
5 Plot at the coordinates corresponding to the position of “0.3 m” from the left frame and
“0.3 m” from the upper frame, ie, the position of (3, 3), and draw the icon P with the plot as
the center position Do.
[0042]
Also, the icon L is drawn based on the plot position of the speaker arrangement position P and
the parameter “r” stored in the setting state table TBL2. Specifically, a concentric circle whose
radius is “r” centering on the coordinates of the plot corresponding to the arrangement
position of each speaker S is assumed. For example, in the case of the example of the setting state
table TBL2 shown in FIG. 3, the parameter “r = 1.0 m” is stored in the field corresponding to
“FR” ch. In this case, a concentric circle having a radius of "1.0 m" is set around the
coordinates of (3, 3).
[0043]
Then, the system control unit 5 plots on the coordinate point closest to the position where all the
circles intersect set for each speaker S, and draws the icon L centering on the coordinate
position. Further, at this time, there is a possibility that the circles do not intersect exactly at one
point, but in this case, it is optional about what point the system control unit 5 sets as a listening
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point. For example, a plurality of points at which the circles intersect may be recognized as
correction values, and may be plotted at a predetermined position, or may be plotted at the
center points of the plurality of points at which the circles intersect. good. In any case, in such a
case, it is possible to prevent processing errors by performing processing as an error.
[0044]
Here, as described above, since the coordinates are set on this setting screen, when each icon P, L
is moved, the sound field is based on the coordinate position before and after the movement of
the icon P, L. It becomes possible to calculate a new distance between the loudspeaker S and the
listening point in space. The system control unit 5 updates the parameter “r” of the setting
state table TBL2 based on the calculation result. Then, the system control unit 5 searches the
parameter table TBL1-k using the updated “r” as a search key, and is stored in the parameter
table TBL1-k in association with the distance corresponding to the “r”. The parameter such as
"DT" is read out, and the parameter such as "DT" stored in the setting state table TBL2 is updated
according to the read-out parameter.
[0045]
[1.2] Operation of Embodiment (1) Operation at Initial Setting Next, an operation at the time of
initial setting in the sound reproduction system SY according to the present embodiment will be
described with reference to FIG. When performing the initial setting, the user first arranges the
speakers S corresponding to each channel, turns on the power of the sound reproducing device
A, and performs a predetermined input operation on the remote control device and the
instruction input unit 8 It will be necessary. The contents of the input operation at this time are
arbitrary. For example, the instruction input unit 8 and the remote control device may be
provided with dedicated keys for initial setting.
[0046]
The system control unit 5 executes an initial setting process shown in FIG. 5 using the input
operation as a trigger. In this process, the system control unit 5 first generates image data and
supplies the image data to the video processing unit 9 (step S1), and waits for input by the user
(step S2 "no").
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[0047]
On the other hand, when the display process is performed, the monitor MN displays, for example,
a box for inputting these parameters together with an image prompting the input of the
parameters “l1” and “l2” as shown in FIG. The button "done" is displayed. In this state, the
user measures the size of the room, the distance from the center of the speaker S to the rear wall,
and the distance to the front left wall of the speaker, and inputs the measurement result to the
instruction input unit 8 or the like. It will be necessary. When the input of all the parameters is
completed and the user performs an input operation to select the complete button on the
instruction input unit 8 or the like, the system control unit 5 determines “yes” in step S2.
Then, the input contents are stored in the RAM (not shown) (step S3).
[0048]
Next, the system control unit 5 reads out the model name of the speaker S stored in the
parameter table TBL1-k (step S4), and generates image data corresponding to a list for selecting
the read model name. After being supplied to the video processing unit 9 (step S5), the input
operation of the user is put on standby (step S6 "no"). As a result, a list of model names of
selectable speakers S is displayed on the monitor MN. In this state, the user performs an input
operation to select a model name for the instruction input unit 8 or the remote control device.
Then, the system control unit 5 determines "yes" in step S6, stores the selected model name in
the RAM (step S7), generates image data again, and outputs it to the video processing unit 9 ((6)
Step S8): A state of waiting for the user's input (step S9 "no").
[0049]
As a result, the monitor MN automatically detects the position of "listening point L." When
preparation is completed, a button "Start" is displayed with a text such as "Please select start
button". In this state, when the user arranges the microphone at the position to be the listening
point and performs an input operation to the effect that the "start" button is selected for the
instruction input unit 8 etc., the system control unit 5 Then, the control signal is output to the
audio processing unit 4 (step S10). As a result, the voice processing unit 5 outputs voice data
corresponding to the impulse signal to the D / A conversion unit 10, and calculates the
parameters "DT", "DB", and "F" according to the voice collected by the microphone. Do.
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[0050]
Thus, when these parameters are calculated, the system control unit 5 searches the parameter
table TBL1-k corresponding to the model name stored in the RAM, and the calculated parameters
such as "DT" Read out the stored distance in association with. Then, the system control unit 5
generates the setting state table TBL2 based on the distance, the model name stored in the RAM,
and the parameters "l1" and "l2" (step S11).
[0051]
As a result of the above process being performed, when the setting state table TBL2 is generated,
the system control unit 5 executes the setting screen data generation process shown in FIG. 7
based on the generated setting state table TBL2 (step S12). End the initialization process.
[0052]
In the setting screen data generation process (step S12), the system control unit 5 first reads out
the parameters “l1-1” and “l1-2” relating to the room size from the generated setting state
table TBL2 (step Sa1). And the frame W is drawn on the RAM based on the parameters “l1-1”
and “l1-2” (step Sa2).
At this time, the system control unit 5 calculates the number of pixels per unit length (for
example, 10 cm) based on the parameters “11-1” and “11-2” and the number of displayable
pixels of the monitor MN, A frame W is drawn according to the number of pixels.
[0053]
Next, after setting the coordinate axes inside the drawn frame W (step Sa3), the system control
unit 5 determines the parameters “I2-1” and “I relating to the arrangement position of the
speaker S corresponding to each channel from the setting state table TBL2. 12-2 ”is read (step
Sa4), and plotting is performed within the frame W based on the parameters“ 12-1 ”and“ 122 ”(step Sa5). At this time, for example, when “l2-1” = “0.3 m” and “l2-2” = “0.3 m”
for the speaker FRS of “FR” ch, the system control unit 5 Plot at coordinate (3, 3).
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[0054]
When plotting is performed in this manner, the system control unit 5 draws an image
corresponding to the icon P on the plot (step Sa6), and reads out the parameter "r" from the
setting state table TBL2 (step Sa7). ). Then, the system control unit 5 plots at a position
corresponding to the listening point based on these parameters (step Sa8), draws an image
corresponding to the icon L (step Sa9), and ends the process.
[0055]
As a result of the series of processes as described above being performed, the setting state table
TBL2 and setting screen data corresponding to the initial setting are recorded in the recording
unit 6 of the sound reproducing apparatus A.
[0056]
(2) Operation at the time of setting change Next, an operation at the time of setting change in the
sound reproducing apparatus A according to the present embodiment will be described with
reference to FIG. 8 and FIG.
In order to change the setting of the sound reproducing apparatus A, the user first needs to make
a predetermined input to the instruction input unit 8 or perform a predetermined input operation
to a remote control device (not shown). . The contents of the input operation at this time are
arbitrary.
[0057]
When such an input operation is performed, the system control unit 5 starts the setting change
process shown in FIGS. 8 and 9. In the setting change process, the system control unit 5 first
reads the setting screen data recorded in the recording unit 6, generates image data in which the
setting screen data is drawn, and the image processing unit 9 generates the image data. Then, it
is supplied (step Sb1), and it is in a state of waiting for selection by the user (step Sb2 "no"). As a
result, for example, an image as shown in FIG. 10 is displayed on the monitor MN.
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[0058]
As shown in the figure, at this time, an image corresponding to the setting screen is displayed on
the image displayed on the monitor MN, and, for example, icons I1 and I2 for selecting setting
contents to be changed are displayed. Be done. Here, these icons I1 and I2 correspond to (icon
I1) a change command of the model of the speaker S, and (icon I2) a change command of the
arrangement position of the speaker S and the position of the listening point, respectively. There
is. Therefore, when one of the icons I1 and I2 is selected on the same screen, the system control
unit 5 executes a process corresponding to the icon I1 or I2.
[0059]
In this state, when the user performs an input operation to select icon I1 or I2 to instruction
input unit 8 or the remote control device, system control unit 5 determines "yes" in step Sb2, and
In this state, it is determined whether the selected icon is the icon I1 or I2 (step Sb3). When the
user has performed an input operation to select the icon I1, the system control unit 5 determines
“yes” in this determination, and for example, “selects the speaker S whose model is to be
changed” along with the setting screen data. The image data in which the character string
"Please draw" is drawn is generated and supplied to the video processing unit 9 (step Sb4), and
the user's input is in a standby state (step Sb5 "no"). In this state, the user needs to perform an
input operation to select the speaker S whose model is to be changed.
[0060]
Then, when the user performs an input operation to select the speaker S whose model should be
changed, the system control unit 5 determines “yes” in step Sb5, and extracts the coordinates
of the selected speaker S. Then, the coordinates are stored in the RAM (step Sb6). Next, the
system control unit 5 reads the speaker model name from the parameter table TBL1-k recorded
in the recording unit 6 (step Sb7), and then a list for selecting the speaker model based on the
read model name. The image data corresponding to the table is generated and supplied to the
video processing unit 9 (step Sb8), and the input operation of the user is on standby (step Sb9
"no").
[0061]
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As a result of such processing being performed, a list of model names of selectable speakers S is
displayed on the monitor MN. In this state, the user operates the instruction input unit 8 or the
remote control device to perform an input operation to select a model name. Then, the system
control unit 5 determines "yes" in step Sb9, and updates the setting state table TBL2 (step Sb10).
At this time, the system control unit 5 reads the parameter "r" corresponding to each channel
from the setting state table TBL2, and the parameter "TBL1-k" stored in the parameter table
TBL1-k in association with the distance corresponding to the "r". Read out "DT", "DB", "F". Then,
the system control unit 5 updates the setting state table TBL2 by storing parameters such as
“DT” in the field corresponding to the “r” of the setting state table TBL2 (step Sb10).
[0062]
Next, the system control unit 5 generates image data and supplies the image data to the video
processing unit 9 (step Sb11), and waits for a user's input (step Sb12 "no"). As a result, on the
monitor MN, two buttons of “continue” and “end” are displayed together with a string such
as “setting has been changed, do you want to continue setting change”, for example. In this
state, when the user performs an input operation to select any button on the instruction input
unit 8 or the remote control device, the system control unit 5 determines “yes” in step Sb12, It
is determined whether the selected button is the "end" button (step Sb13). And when it judges
with "yes" in this judgment, system control part 5 ends processing.
[0063]
On the other hand, if it is determined that the determination is "no" in this determination, that is,
if the user has performed an input operation to select the "continue" button, the system control
unit 5 again performs steps Sb1 and Sb2. Run. As a result, the monitor MN displays an image as
shown in FIG. Then, when the user performs an input operation to select the icon I2, the system
control unit 5 displays, for example, a character string such as "Please select an object to be
moved on the setting screen and drag and drop". Image data including the corresponding data
and the setting screen data is generated and supplied to the video processing unit 9 (step Sb14),
and the input operation of the user is on standby (step Sb15 "no").
[0064]
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In this state, the system control unit 5 monitors the input to the instruction input unit 8 or the
like, and calculates how much the coordinate of the dragged icon has changed in the horizontal
direction and the vertical direction from the position before movement. . Then, the system
control unit 5 causes the monitor MN to display the moving distance in the vertical direction and
the moving distance in the horizontal direction in the listening space of the icon from the
coordinate change in the horizontal direction and the vertical direction of the icon.
[0065]
On the other hand, in accordance with the image displayed on the monitor MN, an input
operation to drop the icon being selected by the user is performed on the instruction input unit 8
or the like. Then, the system control unit 5 determines “yes” in step Sb15, and determines
whether or not the moved object corresponds to the icon P (step Sb16).
[0066]
Here, for example, when the user selects the icon FLP corresponding to the speaker S of “FL”
ch in the instruction input unit 8 and performs an input operation to determine the position of
the movement destination, system control The unit 5 determines “yes” in step Sb16, and
calculates the distance to the listening point from the coordinates of the movement destination of
the speaker S corresponding to “FL” ch on the setting screen (step Sb17). In addition, about
the calculation method of the distance in this case, it is arbitrary. For example, it is possible to
adopt the following method. That is, if the coordinates corresponding to the destination are (X ',
Y') and the coordinates of the listening point are (X1, Y1), (where R is the distance from the
destination of the speaker S to the listening point) The distance between the moving destination
of the speaker S and the listening point is calculated by calculating
[0067]
Thus, when the calculation of the distance is completed, the system control unit 5 updates the
setting screen data and the setting state table TBL2 based on the calculation result (step Sb18).
At this time, the system control unit 5 reads out the model name stored in the setting state table
TBL2, determines the parameter table TBL1-k, and stores it in the parameter table TBL2 in
association with the calculated distance. Read parameters such as "DT". Then, the system control
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unit 5 overwrites the parameter stored in the setting state table TBL2 with the read parameter
such as "DT" to update the setting state table TBL2 (step Sb18). At this time, the system control
unit 5 also plots the setting screen data at the coordinates corresponding to the position of the
movement destination, changes the drawing position of the icon P or L, and changes the setting
screen data after the change. The image is recorded in the recording unit 6 (step Sb18).
[0068]
On the other hand, when the user selects the icon L corresponding to the listening point and
performs an input operation to determine the position of the movement destination, the system
control unit 5 determines “no” in step Sb16, The distance from the movement destination to
each speaker S is calculated (step Sb19). Also in this case, the method of calculating the distance
is arbitrary as described above. Thus, when the distance between the listening point and the
speaker S is calculated, the system control unit 5 updates the setting state table TBL2 and the
setting screen data based on the calculation result (step Sb20).
[0069]
When such processing is completed, the system control unit 5 executes the processing of step
Sb11 to step Sb13 again, and when the “end” button is selected, it is determined as “yes” in
step Sb13 and the processing is ended. On the other hand, when the "continue" button is
selected, the processing of step Sb1 to step 20 is repeated.
[0070]
When the setting state table TBL1 is changed through the above processing, the audio processing
unit 4 performs signal processing on the input audio data based on the updated setting state
table TBL2.
Specifically, based on the parameter "DT" stored in the updated setting state table TBL2, the
delay time of the audio data corresponding to each channel is changed, or the audio based on the
parameter "DB" The sound pressure of the data is changed, and furthermore, the frequency
characteristic is also changed.
[0071]
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As described above, the sound reproducing apparatus A according to the present embodiment
amplifies the speakers corresponding to the respective sound signals based on the plurality of
sound signals such as the audio data corresponding to the plurality of channels, for example. Is a
screen for displaying a virtual space in which a sound field space is reproduced in the sound
reproducing device A for providing a sound field space having a sense of presence to a person,
and a listening point in the sound field space The setting screen on which the icons P and L are
drawn at the position corresponding to the position) and the arrangement position of each
speaker S is displayed on the monitor MN, and the setting screen according to the input
operation performed by the user based on the setting screen Setting state of each speaker S in
the virtual space and the setting state of the listening point based on the setting screen and the
video processing unit 9 and the system control unit 5 which change the System control unit that
recognizes, for example, the movement state of the listening point and the arrangement position
of the speakers S, and calculates the actual distance between each speaker S and the listening
point in the sound field space based on the recognition result And a voice processing unit 4 and a
system control unit 5 that perform signal processing corresponding to the calculated distance on
the acoustic signal.
[0072]
With this configuration, when the setting screen is changed according to the input operation
performed by the user, for example, the movement states of these speakers S and listening points
are set as the system based on the setting screen after the change. The system control unit 5
calculates the distance after the movement, which is recognized by the control unit 5.
As a result, the audio data is processed by the audio processing unit 4 for each channel while
using the parameter corresponding to the calculated distance. For this reason, even when the
position of the listening point and the arrangement position of the speaker S are changed, the
optimum sound field can be simply selected without performing automatic measurement again
or measuring the distance between the speaker and the wall with a tape measure. It is possible to
reproduce.
[0073]
Further, in the present embodiment, when it is recognized that the listening point is moved or
each speaker S is moved in the virtual space, the system control unit 5 of the sound reproducing
device A determines the sound field based on the recognition result. The actual distance between
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each speaker S and the listening point in the space is calculated. With this configuration, position
changes such as listening points on the setting screen are recognized at any time, and the
distance after the movement is calculated. For this reason, according to the distance after
movement, parameters for performing signal processing of audio data are appropriately changed
according to the distance after movement, and an optimum sound field at the listening point is
obtained even after movement of the speaker S or the like. It is possible to reproduce.
[0074]
Furthermore, in the present embodiment, the system control unit 5 of the sound reproducing
apparatus A determines a coordinate point in the setting screen, and based on the drawn
coordinates of the icons P and L on the setting screen, a speaker in the virtual space A
configuration is adopted in which the movement destination of S and the movement destination
of the listening point are recognized. For this reason, the movement distance of the speaker S etc.
before and after the movement can be accurately calculated based on the coordinates of each
point, thereby reproducing the optimal sound field at the listening point even after the movement
of the speaker S etc. Is possible.
[0075]
Furthermore, in the sound reproduction device A according to the present embodiment, the
parameter (calculation coefficient) when the sound processing unit 4 performs signal processing
on audio data corresponding to each channel is the distance between the speaker S and the
listening point And the voice processing unit 4 associates the parameters stored in the parameter
table TBL1-k with the calculated distance in association with the calculated distance. It is
configured to perform signal processing while using it. With this configuration, signal processing
based on the parameters stored in the parameter table TBL1-k is performed. Therefore, even
when the speaker S or the like is moved, an optimal sound field is reproduced at the listening
point. Is possible.
[0076]
Furthermore, the audio processing unit 4 of the audio reproduction apparatus A according to the
present embodiment is a signal that changes the delay time, the sound pressure level, and the
frequency characteristic of the audio data corresponding to each channel based on the calculated
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distance. It is configured to perform processing. For this reason, appropriate signal processing is
performed for each channel, and an optimal sound field is reproduced at the listening point.
[0077]
Further, in the sound reproduction device A according to the present embodiment, the system
control unit 5 draws an icon L representing a position corresponding to the listening point in the
sound field space, and a speaker at a position corresponding to the arrangement position of each
speaker S Is configured to draw an icon P representing. For this reason, the listener who visually
recognizes the setting screen can determine the current setting state at a glance and perform
setting.
[0078]
In the present embodiment, the sound reproducing apparatus A has been described for the case
where 5.1 channel audio data is input. However, the number of channels of the input audio data
may be any number.
[0079]
Further, in the present embodiment, five speakers of FRS, FLS, CS, SRS, and SLS are connected to
the sound reproducing apparatus A, and the configuration is such that outputs audio signals of
different channels. The speaker of may be connected.
[0080]
Furthermore, when changing the model of the speaker S, the sound reproducing apparatus A
according to the present embodiment already uses the parameter “r” stored in the setting state
table TBL2, that is, between the listening point and the speaker S. It is configured to use distance.
However, when changing the model of the speaker S, the distance may be newly calculated.
[0081]
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Furthermore, in the above embodiment, the parameter table TBL1-k corresponding to each
model is recorded in advance in the recording unit 6 of the sound reproducing apparatus A.
However, these parameter tables TBL1-k may be downloaded via a network such as the Internet.
In this case, it is necessary to mount a WWW (World Wide Web) browser on the sound
reproducing apparatus A and to provide a network interface. On the other hand, an FTP (File
Transfer Protocol) server that holds the parameter table TBL1-k as a resource may be provided
in the Internet, and the parameter table TBL1-k may be downloaded from the server as
necessary.
[0082]
Furthermore, in the present embodiment, when the position of the speaker S is changed on the
setting screen, the system control unit 5 updates the content of the setting state table TBL2, and
the sound reproducing device A updates the setting state table TBL2 after the update. The audio
processing unit processes audio data using various parameters stored, thereby realizing sound
image localization with respect to a listening point. However, it is also possible to add a new
speaker S or delete an already arranged speaker by an operation on the setting screen as well as
the change of the arrangement position.
[0083]
When adopting this configuration, it is necessary to adopt the following method. That is, when
the speaker S already arranged on the setting screen is deleted, the system control unit 5 sets
each parameter stored in the field corresponding to the deleted speaker S in the setting state
table TBL2. While deleting, parameters such as "DT" corresponding to the number of speakers
after the deletion are read out from the parameter table TBL1-k, and the setting state table TBL1k is updated with the parameters. Then, the audio processing unit 4 superimposes the audio data
of the channel corresponding to the deleted speaker S on the audio data of the other channels,
and uses the parameters stored in the setting state table TBL2 after the update, Calculation and
processing of the superimposed audio data are performed. Then, the audio processing unit 4
outputs the processed audio data to the D / A conversion unit 10, and the output of the audio
signal to the deleted speaker S is turned off.
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[0084]
On the other hand, when a new speaker S is added on the setting screen, the system control unit
5 creates a field corresponding to the added speaker S in the setting state table TBL2, and
various parameters in the field. Add Then, the audio processing unit 4 may process and calculate
the audio data based on the updated setting state table TBL2.
[0085]
Furthermore, in the present embodiment, a configuration is adopted in which the user inputs the
size of the room in which the sound reproduction system SY is installed according to the image
displayed on the monitor MN. However, when measuring the size of the room, it is also possible
to expand the sound from each speaker S, collect the sound with a microphone, and
automatically measure the size of the room.
[0086]
Furthermore, in the present embodiment, audio data and video data in digital format are input
from the media reproduction device MP to the sound reproduction device. However, the content
data read from the medium may be converted into an analog signal in the media playback device
MP, and the analog signal may be input to the sound playback device A. In this case, it is not
necessary to provide the video processing unit 9 with a decoder, and furthermore, it is not
necessary to provide the D / A conversion unit 8.
[0087]
[2] Modifications of Embodiment (1) Modification 1 In the sound reproduction system SY
according to the above embodiment, the parameter table TBL1-k is provided for each speaker
model, and the parameter table TBL1-k used depending on the type of speaker used. A
configuration to change k was adopted. However, the parameter table TBL1-k is not always
required to be provided for each model of the speaker S. For example, the parameter table TBL1k may be provided according to the size of the speaker such as "LARGE" or "SMALL". In
particular, the frequency characteristics of the sound amplified by the speaker S largely depend
on the speaker size. Therefore, if the parameter table TBL1-k is provided according to the
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speaker size, the signal corresponding to the model of the speaker S It is also possible to change
the parameters at the time of processing. Further, when adopting such a method, even if a
plurality of parameter tables TBL1-k are provided, parameters such as "DT" corresponding to the
speakers S of each size are stored in one table TBL1-k. good.
[0088]
Furthermore, the model name of the speaker S and the size are stored in association with each
other in the parameter table TBL1-k, and a screen for selecting the speaker S to be used based on
the model name is displayed on the monitor MN. According to the above, the size of the speaker
actually used may be determined based on the input operation performed by the user.
[0089]
Furthermore, when there is no need to change parameters depending on the model of the
speaker S, parameters such as “DT” corresponding to each distance are stored in one
parameter table TBL1-k, and setting is performed using this parameter. It is also possible to
generate and update the state table TBL2.
[0090]
(2) Modified Example 2 In the sound reproduction system SY according to the above
embodiment, the sound reproduction device A is configured by a single device such as an AV
amplifier.
On the other hand, in the present modification, for example, an AV amplifier and an information
processing apparatus such as a personal computer (Personal Computer) are connected, and the
processing executed by the sound reproduction apparatus A alone in the above embodiment is
performed. On a computer.
[0091]
The configuration of the sound reproduction system SY according to this modification for
realizing such a function is shown in FIG.
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In the figure, the same elements as the elements shown in FIG. 1 described above are denoted by
the same reference numerals. Therefore, elements denoted by the same reference numerals have
the same configuration as the above embodiment unless otherwise indicated, and perform the
same operation. As shown in the figure, the sound reproduction system SY according to this
modification includes a monitor MN, a media reproduction apparatus MP such as a DVD
recorder, a front light speaker FRS as a sound source, a front left speaker FLS, a center speaker
CS, and a surround. A light speaker SRS, a surround left speaker SLS, a sound reproduction device
A1, and an information processing device PC are included.
[0092]
Here, in the present modification, the sound reproducing apparatus A1 has an external device
interface unit (hereinafter, “interface” is abbreviated as “I / F”) 13 that mediates exchange
of data with the information processing apparatus PC. The external apparatus I / F unit 13 is
connected to the information processing apparatus PC. The information processing apparatus PC
connected to the sound reproducing apparatus A1 includes a recording unit P1, a control unit
P2, an external device I / F unit P3, and a display unit P4, and the recording unit P1 includes The
parameter table TBL1-k, the setting state table TBL2, and the setting screen data stored in the
recording unit 6 of the sound reproducing apparatus A in the above embodiment are stored.
[0093]
Further, in the recording unit P1, together with the above-described table, a control program for
the control unit P2 to control each unit of the information processing apparatus PC is recorded,
and the control unit P2 executes this control program. The setting state table TBL2 and setting
screen data are generated and updated. The operation when the control unit P2 generates the
setting state table TBL2 and the setting screen data at the time of initial setting of the sound
reproducing apparatus A1 is the same as in FIGS. 5 and 7 described above, and the setting state
table TBL2 and the setting screen data Since the operation at the time of updating is similar to
that of FIG. 8 and FIG. When the setting change is performed, the setting screen is displayed on
the display unit P4.
[0094]
Further, when the control unit P2 generates the setting state table TBL2 and updates the setting
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state table TBL2, the control state table TBL2 is transmitted to the sound reproducing apparatus
A1 via the external device I / F unit P3. It has a function to transmit. The setting state table TBL2
transmitted by the information processing apparatus PC is recorded in the recording unit 16 of
the sound reproducing apparatus A1, and is used when the audio processing unit 4 of the sound
reproducing apparatus A1 processes and calculates audio data. .
[0095]
Therefore, when the contents of the setting state table TBL2 are updated in the information
processing apparatus PC, the updated setting state table TBL2 is always shared in the sound
reproducing apparatus A1, and the setting change content by the user is It is fed back to the
sound reproducing apparatus A1 and used for processing of audio data.
[0096]
As described above, the sound reproduction system SY1 according to the present modified
example corresponds to each of the plurality of speakers S and, based on a plurality of sound
signals such as audio data corresponding to a plurality of ch, for example, Information processing
in a sound reproduction system SY1 including a sound reproduction device A1 for expanding a
speaker and providing a sound field space having a sense of presence to a listener, and an
information processing device PC for executing various signal processing The device PC is a
screen for displaying a virtual space in which a sound space is reproduced, and the icons P and L
are drawn at positions corresponding to the listening points and the arrangement positions of the
speakers S in the sound space. A screen is displayed on the display unit P3, and the setting
screen is changed according to the input operation performed by the user based on the setting
screen, and virtual based on the setting screen. While recognizing the setting state of each
speaker and the setting state of the listening point in the space, the actual distance between each
speaker S and the listening point in the sound field space is calculated based on the recognition
result and the calculation According to the result, the control unit P2 for controlling the sound
reproducing apparatus A1 is provided, and the sound reproducing apparatus A1 supports signal
processing corresponding to the calculated distance under each control of the information
processing apparatus PC. The audio processing unit 4 is provided with an audio processing unit
4 for performing audio data.
[0097]
With this configuration, when the setting screen is changed according to the input operation
performed by the user, for example, the moving states of these speakers S and listening points
are set based on the setting screen after the change. The distance is recognized by the control
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unit P2 of the processing device PC, and the distance after the movement is calculated by the
control unit P2.
As a result, the audio data is subjected to signal processing for each channel by the audio
processing unit 4 of the sound reproduction device A1 while using the parameter corresponding
to the calculated distance.
For this reason, even when the position of the listening point and the arrangement position of the
speaker S are changed, the optimum sound field can be simply selected without performing
automatic measurement again or measuring the distance between the speaker and the wall with
a tape measure. It is possible to reproduce.
[0098]
In this modification, the actual distance in the sound field space, that is, the distance between the
listening point and each speaker S is calculated according to the setting content on the setting
screen, and the sound reproducing device A1 calculates each channel. The information
processing apparatus PC is configured to perform control when performing signal processing on
audio data corresponding to a recording medium, and a recording medium on which a program
defining the operation of the control process is recorded and a computer for reading the
recording medium , And the same recording processing operation as described above may be
performed by reading the program by this computer.
[0099]
It is a block diagram showing composition of sound reproduction system SY in an embodiment.
It is a figure which shows an example of the recording content of parameter table TBL1-k in the
same embodiment. It is a figure which shows an example of the recording content of setting state
table TBL2 in the embodiment. It is a figure which shows an example of the image displayed
based on the setting screen data in the embodiment. It is a flowchart which shows the process
which the system control part 5 of the sound reproduction apparatus A in the embodiment
performs. It is a figure which shows an example of the image displayed on the monitor MN in the
embodiment. It is a flowchart which shows the process which the system control part 5 of the
sound reproduction apparatus A in the embodiment performs. It is a flowchart which shows the
process which the system control part 5 of the sound reproduction apparatus A in the
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embodiment performs. It is a flowchart which shows the process which the system control part 5
of the sound reproduction apparatus A in the embodiment performs. It is a figure which shows
an example of the image displayed on the monitor MN in the embodiment. FIG. 10 is a diagram
showing a configuration of a sound reproduction system SY1 in a modification 2;
Explanation of sign
[0100]
SY, SY1 ... sound reproduction system MN ... monitor MP ... media reproduction device FRS, FLS,
CS, SRS, SLS ... speaker A, A1 ... sound reproduction device
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