close

Вход

Забыли?

вход по аккаунту

?

JP2006352583

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2006352583
PROBLEM TO BE SOLVED: To provide an "audio apparatus" capable of realizing a sound field
optimum for a state of actually listening to a sound in a vehicle cabin etc. without requiring a
user's troublesome operation when setting each speaker. SOLUTION: There are provided a
plurality of speakers, a sensor disposed at an audio listening point, and a sensor for detecting
sound radiated from each speaker, and a function for measuring a delay time from the speaker to
the listening point based on detection results of the sensor. In an audio device having a control
unit and a memory unit storing data of a plurality of distance ranges set in advance, the delay
time for each speaker measured based on the function (S1 to S7) The distance from the audio
listening point to the audio listening point is calculated (S8), and the assignment setting of each
speaker is performed based on comparison and comparison between the calculation result and a
plurality of distance ranges stored in the memory unit (S9, S10). [Selected figure] Figure 3
Audio device
[0001]
The present invention relates to an audio apparatus, and in particular, a technique useful for
setting the assignment of each speaker in an audio apparatus such as a car audio apparatus
provided with a plurality of speakers for inputting an audio signal of each channel output from
an audio source. About.
[0002]
For example, in the case of an on-vehicle audio apparatus provided with a plurality of speakers
10-05-2019
1
respectively arranged at predetermined places in a vehicle compartment, even if the same audio
equipment is used, the speaker system used according to the user's preference and vehicle type It
is diverse.
On the other hand, in the conventional product, the user manually sets the speaker assignment
setting used by himself in the audio processor or the like.
[0003]
For example, for an audio processor having outputs of eight channels (CH1 to CH8), CH1 should
be connected to each front left speaker, CH2 should be front light speaker, CH3 should be
connected to each channel, and so on. The speakers are set one by one manually. Also, depending
on the product, there are some products in which the speakers to be connected to each CH are
fixed, such as CH1 / CH2 only for the front side speaker and CH3 / CH4 only for the rear side
speaker. In this case, although the user has a certain degree of freedom of choice, it is still limited
to the selection from several fixed patterns.
[0004]
Further, in the on-vehicle audio apparatus, the distance from each speaker to the ear (audio
listening point) of the driver who is the main listener is different. For example, as can be seen
from the arrangement example shown in FIG. 2, the distances from the speakers SP1 to SP6 to
the audio listening points (microphones MC provided in the headrest of the driver's seat) are
different. If the distance from each speaker to the listening point is different, even if sound is
simultaneously generated from each speaker, the time for the sound to reach the driver's ear is
different, and comfortable music can not be enjoyed.
[0005]
As a technology corresponding to this, there is a function called "automatic TCR (Time
Correction)". The applicant has previously proposed a technology related to this automatic TCR
function (see Patent Document 1). In the technique described in this patent document 1, the
delay time from each speaker to the audio listening point is measured, the maximum delay time
is obtained among the measured delay times, and the audio signal to be input to each speaker is
10-05-2019
2
the maximum delay. By delaying the time according to the difference between the time and the
delay time from the speaker to the listening point, the sounds from the respective speakers reach
the listening point simultaneously. JP 2001-112100 A
[0006]
As described above, there are a wide variety of audio devices to which speakers are connected,
depending on the preference of the user, the type of car, the type of speakers, the number of
speakers, etc. ) Does not necessarily match the user's intended speaker settings (sound field
settings).
[0007]
Further, in the conventional product, since it is necessary for the user to manually perform the
assignment setting of the speaker used by himself, the setting of the user is very troublesome,
especially when the number of output channels is large, the troublesomeness of the setting
becomes more remarkable. There is also the possibility of mistakes in setting.
Therefore, it may happen that the sound field expected by the user can not be realized, or
sometimes the speaker may be broken. In particular, in the case of a tweeter (small speaker) that
outputs an audio signal in a high range, when a signal (voltage) of an unnecessary level is
applied, the speaker itself may be destroyed.
[0008]
The above problems may occur not only in car audio devices but also in general audio devices
including home use as long as they are in an environment where audio sound is heard in a
predetermined space.
[0009]
The present invention has been made in view of the problems in the prior art, and the setting of
each speaker constituting the speaker system does not require the user's troublesome operation,
and is actually performed in a predetermined space (such as a vehicle cabin). An object of the
present invention is to provide an audio device capable of realizing a sound field optimum for a
state of listening to sound.
10-05-2019
3
[0010]
In order to solve the above-mentioned problems of the prior art, the present invention effectively
utilizes the delay time measurement technology based on the automatic TCR function previously
proposed by the applicant.
[0011]
That is, the audio apparatus according to the present invention includes a plurality of speakers
and an audio listening point, a sensor for detecting a sound emitted from the speakers by
application of a pulse signal to each speaker, detection results of the sensors The control unit has
a control unit having a function of measuring the delay time from the speaker to the audio
listening point based on the above, and a memory unit that stores data of a plurality of distance
ranges set in advance, and the control unit The distance from the speaker to the audio listening
point is calculated from the delay time of each speaker measured based on the above, and with
reference to the plurality of distance ranges stored in the memory unit, Specifying which distance
range the distance is included in, and based on the specified result, automatically assigning the
speakers And performing.
[0012]
According to the audio apparatus of the present invention, the distance from the speaker to the
audio listening point is calculated from the result (delay time) measured by the delay time
measurement based on the automatic TCR function, and the calculation result and the memory
unit Based on comparison and comparison with a plurality of distance ranges stored in, it is
determined how each speaker is arranged with respect to the audio listening point, and
automatic assignment setting of each speaker is performed.
As a result, a sound field that is most suitable for listening to sounds in a vehicle cabin or the like
(that is, the user desires more accurately) without the need for troublesome operations (setting
by manual input) as seen in the prior art Sound field) can be realized.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to the
attached drawings.
[0014]
10-05-2019
4
FIG. 1 shows a configuration according to an embodiment in which an audio device according to
the present invention is applied to an on-vehicle audio device.
[0015]
The on-vehicle audio device 10 according to the present embodiment includes a speaker SP, a
microphone MC as a sensor for detecting sound, a control unit 11 configured by a
microcomputer or the like, an amplifier 12, and a switching unit 13 as illustrated. And a volume /
sound quality (VOL / TONE) control unit 14, amplifiers 15 and 16, a delay unit 17, a display unit
18, an operation unit 19, and a register unit 20.
Each functional block 11 to 20 other than the speaker SP and the microphone MC is built in the
audio processor AP, and the audio processor AP is mounted on the middle center console in front
of the front seat in the vehicle interior.
[0016]
In the present embodiment, six speakers SP are provided, and as illustrated in FIG. 2, the
speakers SP are disposed at predetermined positions in the vehicle interior.
In the illustrated example, the front left speaker SP1, the front light speaker SP2, and the front
center speaker SP3 are respectively provided on the left and right doors on the front side and the
center console, and are respectively provided on the left and right and center of the rear tray in
the rear of the rear seat. A rear side left speaker SP4, a rear side light speaker SP5, and a rear
side center speaker SP6 are provided.
Further, the microphone MC is provided at an audio listening point (in the example of FIG. 2, the
headrest at the driver's seat), and is for detecting the sound radiated from each of the speakers
SP1 to SP6.
[0017]
10-05-2019
5
The control unit 11 basically relates to a speaker assignment setting based on delay time
measurement (measurement of delay time from the speakers SP1 to SP6 to the audio listening
point (microphone MC)) by the automatic TCR function as described later. It has a function to
control processing.
The control unit 11 outputs a pulse signal PLS as a reference for delay time measurement, and
outputs a speaker selection signal SEL for selecting which speaker the pulse signal PLS should be
output to, and outputs each channel CH1 to CH6. And the microphone detection signal DET is
taken to measure the delay time.
In addition, after measuring the delay time from all the speakers SP1 to SP6 to the audio
listening point, the control unit 11 obtains the maximum delay time, and calculates the difference
between this maximum delay time and the delay time from each speaker to the listening point It
instructs the delay unit 17 as a delay time (delay difference signal DIF) to be given to the audio
signal of each channel CH1 to CH6.
[0018]
The amplifier 12 is for amplifying the pulse signal PLS output from the control unit 11 to an
appropriate amount. The switching unit 13 is for switching the output path so that the pulse
signal PLS is input to the speaker indicated by the speaker selection signal SEL. The volume /
sound quality (VOL / TONE) control unit 14 outputs the volume / sound quality of the audio
signal of each of the channels CH1 to CH6 output from the audio source (not shown) to the VOL
/ TONE control signal output from the control unit 11 Variable control is performed according to
VTC. The amplifier 15 is for amplifying the audio signal of each channel CH1 to CH6 whose
volume / sound quality is appropriately controlled through the volume / sound quality (VOL /
TONE) control unit 14 and driving the corresponding speakers. . Also, the amplifier 16 amplifies
the sound detected by the microphone MC (microphone detection signal DET) to an appropriate
amount, and outputs the amplified sound to the control unit 11. The delay unit 17 time-delays
the audio signal of each of the channels CH1 to CH6 for each channel based on the delay
difference signal DIF output from the control unit 11 and outputs it.
[0019]
The display unit 18 is an LCD monitor or the like and is provided on the front panel of the audio
10-05-2019
6
processor AP. On the screen of the display unit 18, under the control of the control unit 11,
information such as a setting screen related to pulse level adjustment and an automatic
assignment setting result of speakers to be described later is displayed. The operation unit 19 is
provided on the front panel of the audio processor AP together with the display unit 18, and
includes various keys, buttons, switches, and the like for inputting information instructed by the
user. By operating these keys, buttons, etc., various menus, selection items, etc. are displayed on
the screen of the display unit 18, any menu etc. is selected, and processing concerning the
selected menu etc. is executed.
[0020]
The register unit 20 stores a table to be referred to when performing automatic assignment
setting of each of the speakers SP1 to SP6 as described later, and the table includes a plurality of
predetermined "predetermined" input and set by the user. "Range of distance" data is included.
Each “range of distance” defines a “determination reference value” of the distance to the
speaker, and the control unit 11 refers to the “determination reference value” to set automatic
assignment of each speaker SP1 to SP6. It will be done.
[0021]
Therefore, in order to set the assignment of each speaker correctly, when the user inputs and
sets a plurality of "ranges of distances", it is necessary to prevent the respective "ranges of
distances" from overlapping each other. For example, in the example shown in FIG. 4, six
“ranges of distances” of X01 to X02, X03 to X04, X05 to X06, X07 to X08, X09 to X10, and
X11 to X12 as the respective “ranges of distance”. Is set. In addition, the respective numerical
values have a relationship of X01 <X02 <X03 <X04 <X05 <X06 <X07 <X08 <X09 <X09 <X10
<X11 <X11 <X12.
[0022]
Hereinafter, the process related to the assignment setting of the speaker based on the delay time
measurement by the automatic TCR function performed by the control unit 11 in the on-vehicle
audio device 10 (FIG. 1) according to the present embodiment will be described with reference to
FIG. It explains, referring to.
[0023]
10-05-2019
7
First, in the first step S1, the control unit 11 first selects a speaker connected to the channel CH1
by the speaker selection signal SEL, and further initializes the number of sampling times SN to
one.
[0024]
In the next step S2, the controller 11 outputs a pulse signal PLS.
[0025]
In the next step S3, the microphone detection signal DET is sampled and the data is stored.
That is, after the pulse signal PLS output from the control unit 11 is amplified by the appropriate
amount through the amplifier 12, the switching unit 13 is input to the VOL / TONE control unit
14 corresponding to the speaker instructed by the speaker selection signal SEL. Thereafter, the
signal is input to the selected speaker (in this case, the speaker corresponding to the channel
CH1) via the corresponding speaker driving amplifier 15.
A sound is emitted from the speaker by this pulse input, and this sound is detected by the
microphone MC.
The sound detected by the microphone MC (microphone detection signal DET) is amplified by an
appropriate amount through the amplifier 16 and then input to the control unit 11. In the control
unit 11, since the input detection signal DET is an analog voltage, after converting it into a digital
value, the detection voltage is sampled at predetermined time intervals (for example, 0.1 ms), and
sampling time The data of the sampling value (when the generation time of the pulse PLS is zero
(0)) is stored in the built-in memory or the like.
[0026]
In the next step S4, the control unit 11 determines whether the sampling number SN has reached
a predetermined number (for example, 100 times) (YES) or not (NO). If the determination result
is NO (SN <100), the process proceeds to step S5, the sampling number SN is incremented (+1),
and the sampling operation after step S3 is continued. If the determination result is YES (SN =
10-05-2019
8
100), the process proceeds to step S6.
[0027]
In the next step S6 (when the number of times of sampling reaches 100), the "delay time" of the
speaker is measured. That is, in the control unit 11, the time when the maximum voltage value is
acquired during 100 samplings is taken as the delay time from the speaker (speaker
corresponding to the channel CH1) to the audio listening point (microphone MC). Data of the
measured delay time is temporarily stored in an internal memory or the like.
[0028]
In the next step S7, the control unit 11 determines whether the delay time measurement has
ended (YES) or not (NO) for all the speakers connected to the channels CH1 to CH6. If the
determination result is YES, the process proceeds to step S8. If the determination result is NO,
the process returns to step S1 and the above process is repeated. In this case, the delay time from
the speaker connected to the next channel CH2 to the audio listening point is measured, and the
same processing is repeated for the other speakers thereafter.
[0029]
In the next step S8, from the delay time measured for each speaker and the frequency
(propagation speed) of pulse signal PLS by control unit 11, the “distance” for that speaker, ie,
the audio listening point from that speaker The distances to the microphone MC) are calculated
respectively.
[0030]
In the next step S9, the control unit 11 refers to the table stored in the register unit 20 (a
plurality of “ranges of distances” set in advance, ie, “determination reference values” of
distances), It is specified to which “range of distance” the distance for each speaker calculated
in the step is included.
[0031]
In the final step S10, the control unit 11 connects the user based on the result specified in the
previous step (in which “distance range” the “distance” calculated for each speaker is
10-05-2019
9
included ”). Determine how the speakers SP1 to SP6 are arranged with respect to the listening
point (microphone MC) in the vehicle room, and assign the audio signals of the channels CH1 to
CH6 to the speakers. .
[0032]
FIG. 4 shows an example, and in the illustrated example, the front side light speaker SP2, the
front side center speaker SP3 and the front side left speaker SP1 are arranged in order from the
distance closer to the audio listening point (microphone MC in FIG. 2). The rear side center
speaker SP6, the rear side light speaker SP5, and the rear side left speaker SP4 are assigned.
[0033]
At this time, the assignment setting result (FIG. 4) of the speakers SP1 to SP6 may be displayed
on the screen of the display unit 18 based on control from the control unit 11 as necessary.
[0034]
In the process flow (FIG. 3) described above, the case where tweeters are not included in each of
the speakers SP1 to SP6 has been described as an example, but it is general that tweeters are
provided in an actual speaker system.
In this case, since the speaker (tweeter) may be broken if a pulse signal (voltage) is applied as it
is, it is necessary to set only the tweeter in advance prior to the delay time measurement process.
This is performed by, for example, displaying a setting screen related to pulse level adjustment
on the screen of the display unit 18 via the control unit 11 based on a user instruction from the
operation unit 19 and adjusting the level of the displayed pulse appropriately small. Is done by
[0035]
As described above, according to the on-vehicle audio device 10 (FIG. 1) according to the present
embodiment, the microphone MC is installed in the headrest (audio listening point) of the driver's
seat (see FIG. 2). The delay time from each of the speakers SP1 to SP6 to the audio listening point
is measured by the automatic TCR function (steps S1 to S7), and from the measurement result
(delay time) and the frequency (propagation speed) of the pulse signal PLS, each speaker SP1
10-05-2019
10
The "distance" is calculated for ~ SP6 (step S8), and the speaker system connected to the user
(each audio listening point is compared based on comparison between this calculation result and
the table stored in the register unit 20). Determine how speakers SP1 to SP6 are arranged, and
perform automatic assignment settings for each speaker (Step S9, S10, see FIG. 4).
[0036]
In other words, a sound field that is most suitable for listening to sounds in a vehicle cabin (a
sound field that the user desires more accurately) without requiring the bothersome operation
(setting by manual input) as seen in the prior art. Can be realized.
[0037]
In addition, it can also be confirmed on the screen of the display unit 18 (if necessary) that the
automatic assignment setting of each of the speakers SP1 to SP6 has been performed.
[0038]
In the embodiment described above, although the case where the fixed “range of distance”
input in advance is used as the “determination reference value” of the distance to the speaker
is described as an example, the “range of distance” to be set is Of course, it does not
necessarily have to be a fixed range.
For example, since the range of the distance to the speaker is different depending on the type of
car (light car / wagon / box car, right handle / left handle, etc.), the “determination reference
value” of the distance is appropriately corrected according to the type of car Is desirable.
[0039]
The specification of the vehicle type can be performed automatically by the control unit 11.
In this case, as illustrated in FIG. 5, the control unit 11 is connected to a system bus 30 provided
as an information transmission path common to each on-vehicle device (including the present
apparatus 10). The vehicle ID data supplied from the on-vehicle device (engine controller etc.) 31
of the above is acquired.
10-05-2019
11
When mounted on a vehicle, the on-vehicle device 31 such as an engine controller or the like
generally transmits the ID data of the vehicle to the bus 30 at predetermined time intervals.
In the vehicle ID data, as shown, “ID code”, “vehicle type”, “destination” for identifying
the vehicle type of the own vehicle, and “vehicle-mounted device indicating the type of
electronic device mounted on the vehicle” Data such as “type” and “serial number” for
uniquely identifying the vehicle are included.
The control unit 11 identifies the "vehicle type" from the vehicle ID code, and corrects the
"determination reference value" of the above distance based on the information.
[0040]
For example, in the case of a wagon, each “range of distance” set in advance (in the example
shown in FIG. 4, X01 to X02, X03 to X04, X05 to X06, X07 to X08, X09 to X10, X11 to X12) On
the other hand, a range obtained by adding a predetermined distance based on the control from
the control unit 11 is set as a new “range of distance”.
That is, the "determination reference value" of the initially set distance is set larger. Also,
conversely to this, in the case of a mini car, the "determination reference value" of the initially set
distance is set smaller.
[0041]
Alternatively, the specification of the vehicle type may be performed based on a manual
operation. This is, for example, displaying an operation screen related to vehicle type selection on
the screen of the display unit 18 via the control unit 11 based on a user instruction from the
operation unit 19 and the user selects the vehicle type from the displayed selection items It is
done by. The data of the vehicle type specified in this manner is input to the control unit 11, and
thereafter the "determination reference value" of the distance is corrected in the same manner as
described above.
10-05-2019
12
[0042]
In the embodiment described above, the audio device according to the present invention is
applied to a car, but the present invention is not limited to the gist (from the respective speakers
to the listening point using the automatic TCR function). Of course, the present invention is not
limited to the on-vehicle use, as is apparent from the measurement of the distance and the
automatic assignment setting of each speaker based on the measurement result. The point is that
the present invention is similarly applied to general audio devices including home use, as long as
it is an audio device provided with a plurality of speakers and it is in an environment to listen to
audio sound in a predetermined space. It is possible.
[0043]
Also, transmission of audio signals between the plurality of speakers and the audio processor
may be performed wirelessly.
[0044]
It is a block diagram showing composition concerning one embodiment at the time of applying
an audio system concerning the present invention to a car audio system.
It is a figure which shows the example of arrangement | positioning in the vehicle interior of each
speaker contained in the apparatus of FIG. It is a flowchart which shows an example of the
process which concerns on the assignment setting of the speaker based on the delay time
measurement by the automatic TCR function which the control part performs in the apparatus of
FIG. It is a figure which shows an example of the assignment setting of a speaker. It is
explanatory drawing in the case of performing vehicle type selection automatically in the
apparatus of FIG.
Explanation of sign
[0045]
10-05-2019
13
10: Car audio system. 11: control unit 12, 15, 16: amplifier, 13: switching unit, 14: volume /
sound quality (VOL / TONE) control unit, 17: delay unit, 18: display unit, 19: operation unit, 20:
register unit (Memory unit), 31: vehicle-mounted device for supplying vehicle ID (vehicle type)
data, AP: audio processor, CH1 to CH6: (of audio signal) channel, DET: microphone detection
signal, DIF: delay difference signal, MC: microphone (Sensor), PLS: pulse signal, SEL: speaker
selection signal, SP1 to SP6: speaker, VTC: volume / sound quality control signal.
10-05-2019
14
Документ
Категория
Без категории
Просмотров
0
Размер файла
25 Кб
Теги
jp2006352583
1/--страниц
Пожаловаться на содержимое документа