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JPH07312797

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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 JPH07312797
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reproduces an
acoustic signal from an information recording medium on which an information signal such as an
optical disk, a magneto-optical disk, a video tape, or an audio tape is recorded. The present
invention relates to an audio reproduction apparatus such as a disk reproduction apparatus, a
video tape reproduction apparatus, or an audio tape reproduction apparatus that outputs sound
from the audio system, and more particularly to an acoustic reproduction apparatus using a
surround speaker system.
[0002]
2. Description of the Related Art Nowadays, an acoustic signal is reproduced from an information
recording medium on which an information signal such as an optical disk, a magneto-optical disk,
a video tape, or an audio tape is recorded. BACKGROUND ART Sound reproducing devices such
as disk reproducing devices, video tape reproducing devices, audio tape reproducing devices that
output data are widely used.
[0003]
The above-mentioned sound reproducing apparatus is requested to have a high sense of
presence for the use in a listening room, home theater or the like, or at the request of a sound
field oriented listener.
[0004]
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1
As a method for enhancing the sense of reality, a rear speaker method in which a rear speaker is
combined with the front speaker integrally with the front speaker, or a surround speaker in
which a surround speaker is provided separately from the front speaker A speaker system is
known.
[0005]
In the above rear speaker system, there is a method of shifting the phase of an acoustic signal
output from the front speaker and an acoustic signal output from the rear speaker to give a sense
of reality, or a sound field output from the front speaker Although the method of shifting the
direction and the direction of the sound field output from the rear speakers has been realized, it
has not been achieved to sufficiently enhance the sense of reality.
[0006]
On the other hand, in the above-mentioned surround speaker system, sound with a sufficiently
enhanced sense of reality by disposing the surround speaker with a shift relative to the front
speaker in a direction parallel to the direction of the sound field output from the front speaker A
playback device has been realized.
[0007]
The surround speaker type sound reproducing apparatus includes an audio signal reproducing
apparatus for reproducing an audio signal from an information recording medium mounted on
the audio reproducing apparatus, and a front speaker for outputting sound from a front speaker
based on the audio signal. The reproduction apparatus and the surround speaker reproduction
apparatus disposed at a position distant from the front speaker reproduction apparatus and
outputting sound from the surround speaker based on the sound signal are provided.
[0008]
The acoustic signal reproduction device and the surround speaker reproduction device, which
are disposed at positions separated from each other, are connected by a signal line for
transmitting an acoustic signal from the acoustic signal reproduction device to the surround
speaker reproduction device.
[0009]
For this reason, in a listening room in which a sound reproduction apparatus having a surround
speaker reproduction apparatus connected to a front speaker reproduction apparatus, the
surround speaker reproduction apparatus and the sound signal reproduction apparatus disposed
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2
at different positions are signals. The problem is that the lines are connected in a complicated
way and the appearance of the listening room is impaired.
[0010]
However, in recent years, by transmitting an acoustic signal wirelessly from the front speaker
reproducing device to the surround speaker reproducing device, a signal line is not required, and
a high presence can be obtained without impairing the appearance of the listening room by the
signal line. Possible sound reproduction devices have been realized.
[0011]
By the way, the acoustic signal reproduction apparatus and the surround speaker reproduction
apparatus have the respective distribution lines provided with the plug to be attached to the
outlet provided in the power supply.
In addition, the front speaker reproduction apparatus includes an active system having an
electric circuit such as an amplification circuit and supplied with power, and a system not
including an electric circuit supplied with power, and in the case of the active system, it is
arranged It has a wire.
[0012]
Since the front speaker reproducing device is disposed near the sound signal reproducing device,
power is supplied from the outlet provided at the same place as the sound signal reproducing
device or the outlet even in the case of the active system. Power is supplied from an outlet
provided on the side of the sound signal reproducing apparatus.
Further, the surround speaker reproducing device disposed at a position away from the sound
signal reproducing device is supplied with power from an outlet provided near the surround
speaker reproducing device.
[0013]
As described above, the outlets need to be provided at two places in the listening room, one for
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the acoustic signal reproduction device and the front speaker reproduction device, and one for
the surround speaker reproduction device.
[0014]
However, in general, an outlet is provided in one place in the listening room.
Therefore, in the listening room, two outlets are obtained by branching from one of the provided
outlets and providing an outlet on the extended distribution line to add an outlet.
[0015]
As described above, in the listening room in which the surround speaker type sound
reproduction device is disposed, no signal line from the sound signal reproduction device to the
surround speaker reproduction device is required, and the complexity due to the signal lines is
eliminated. However, there has been the problem that the complexity of distribution lines has
continued.
[0016]
An object of the present invention is to provide an acoustic reproducing apparatus having a high
sense of reality without impairing the appearance of a listening room by signal lines or
distribution lines.
[0017]
A sound reproducing apparatus according to the present invention reproduces an acoustic signal
from an information signal recorded on a mounted recording medium, and sends out the
reproduced acoustic signal to a signal line, And an acoustic signal reproduction apparatus for
wirelessly transmitting the acoustic signal, a front speaker reproduction apparatus for
acoustically outputting the acoustic signal supplied from the signal line from the front speaker,
and a charger for charging power, and the charging is performed. And a surround speaker
reproduction device for supplying the charged power to the speaker and outputting the
wirelessly transmitted sound signal from the surround speaker as sound, and the front speaker
reproduction device and the surround speaker reproduction device The chargers of the surround
speaker reproduction apparatus are configured to be charged when they are detachable and
combined with each other.
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[0018]
The sound reproducing apparatus according to the present invention is a front speaker
reproducing apparatus, which is supplied with power from the same place as the sound signal
reproducing apparatus, and can output sound in the vicinity of the sound signal reproducing
apparatus.
In addition, it is possible to output sound based on an acoustic signal wirelessly transmitted from
an acoustic signal reproduction device, using a charger charged when combined with the front
speaker reproduction device as a power source in a surround speaker reproduction device. It is.
[0019]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a
sound reproducing apparatus according to the present invention will be described below with
reference to FIGS. 1 and 2. FIG.
The video disc reproducing apparatus shown in FIG. 1 is an example of an audio reproducing
apparatus according to the present invention which is configured to be capable of wirelessly
transmitting an audio signal from an audio signal reproducing apparatus to a surround speaker
reproducing apparatus.
[0020]
The video disc reproducing apparatus shown in FIG. 1 reads an audio signal from an information
signal recorded on a mounted video disc, and generates an acoustic signal from the audio signal,
and the acoustic signal is a signal It comprises a front speaker reproduction device 2 supplied by
a line 8 and a surround speaker reproduction device 3 in which the acoustic signal is supplied by
wireless transmission.
[0021]
The audio signal reproduction apparatus 1 uses a signal reading unit 4 for reading out an audio
signal and an image signal from an information signal recorded on a video disc mounted on a
video disc reproduction apparatus, and an audio signal read out by the signal reading unit 4.
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Based on the surround processor 5, which generates a front speaker signal to be sound output to
the front speaker and generates a surround speaker signal to be sound output to the surround
speaker while synchronizing with the front speaker signal, and the surround processor 5 The
front signal amplification circuit section 6 amplifies the front speaker signal supplied from the
processor 5 and sends it to the front speaker reproduction device 2 through the signal line 8, and
the surround speaker signal is superimposed on infrared light, Support for surround speaker
signals superimposed on infrared A und speaker reproducing device 3 and a surround signal
transmission unit 7 for radio transmission.
[0022]
The signal reading unit 4 sends the read audio signal to the surround processor 5.
Also, the read image signal is sent to a display device 21 such as a CRT or the like, and is output
while being synchronized with the audio signal by the display device 21.
[0023]
For example, when the audio signal read by the signal reading unit 4 includes a surround speaker
signal in advance, such as an audio signal for high definition 3-1 broadcast, the surround
processor 5 may It is configured to send a surround speaker signal included in advance to the
surround signal transmission unit 7 without generating a speaker signal.
[0024]
The front speaker signal or the surround speaker signal transmitted from the surround processor
5 is referred to as an acoustic signal.
[0025]
The surround signal transmission unit 7 is provided with a laser diode, superimposes the
surround speaker signal supplied from the surround processor 5 on the infrared ray radiated
from the laser diode, and the surround speaker signal superimposed on the infrared ray It
wirelessly transmits to the surround speaker reproducing device 3.
[0026]
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In the sound signal reproducing apparatus 1 having the above configuration, the left and right
sound signals AR and AL are read from the sound signal read from the video disc by the signal
reading unit 4.
Based on the left and right audio signals AR and AL, the surround processor 5 generates left and
right front speaker signals FR and FL and left and right surround speaker signals SR and SL.
[0027]
The left and right front speaker signals FR and FL are amplified by the front signal amplification
circuit unit 6 and sent to the front speaker reproduction device 2 by the left and right signal lines
8R and 8L.
The surround / speaker signals SR and SL are superimposed on infrared rays by the surround
signal transmitter 7 and wirelessly transmitted to the surround / speaker reproducing device 3.
[0028]
The front speaker reproduction device 2 is connected to the other end of the left and right signal
lines 8R and 8L connected to the front signal amplification circuit unit 6 of the acoustic signal
reproduction device 1 as shown in FIG. A front speaker terminal 9 to which a signal is supplied, a
front speaker 10 connected to the front speaker terminal 9 for acoustically outputting the front
speaker signal, a distribution line 11 to which power is supplied from a power supply, and It has
a protection circuit 12 to which power is input from the distribution line 11 and a front
connection portion 13 to which power is supplied from the protection circuit 12.
[0029]
The front speaker 10 is provided with two speakers that individually output the sound of the
front speaker signals FR and FL separately.
[0030]
The protection circuit 12 has a front connection unit 13 connected to the output side, and
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supplies power to the surround / speaker reproduction device 3 from the front connection unit
13.
In the surround speaker reproducing device 3 to which this power is supplied, the charger 19
described later is charged.
[0031]
The protection circuit 12 for supplying power to the charger 19 of the surround speaker
reproducing device 3 separates the surround speaker reproducing device 3 from the front
speaker reproducing device 2 when the charger 19 is charged. In the case where, or for any
reason, an abnormally large current is input, the current is cut off.
[0032]
The front connection unit 13 is configured such that the surround connection unit 20 of the
surround / speaker reproducing device 3 is detachable.
The surround connection unit 20 is connected to the front connection unit 13 in a state where
the front speaker reproduction device 2 and the surround speaker reproduction device 3 are
combined.
[0033]
In the front speaker reproducing device 2 having the above configuration, the charger 19 of the
surround speaker reproducing device 3 can be connected to the front speaker reproducing
device 2 through the front connection unit 13 by combining the surround speaker reproducing
device 3 with the front speaker reproducing device 2. Power is supplied and the charger 19 is
charged.
[0034]
Further, the left and right front speaker signals FR and FL sent from the sound signal
reproduction device 1 by the left and right signal lines 8R and 8L are acoustically output from
the front speaker 10 provided with the left and right speakers.
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[0035]
As shown in FIG. 2, the surround speaker reproducing device 3 and the surround signal receiving
unit 15 for receiving the left and right surround speaker signals SR and SL wirelessly transmitted
from the surround signal transmitting unit 7 of the acoustic signal reproducing device 1. A
surround signal demodulation circuit 16 that demodulates the received left and right surround
speaker signals SR and SL in order to output the sound, a surround signal amplification circuit 17
that amplifies the demodulated surround speaker signal, and the amplified signal. A surround
speaker 18 for acoustically outputting a surround speaker signal, a charger 19 charged with
power supplied to the surround signal receiving unit 15, the surround signal demodulation
circuit 16 and the surround signal amplification circuit 17, and the charger 19 And a surround
connection unit 20 for supplying power to the
[0036]
The surround signal receiving unit 15 is provided with a photo detector, and the left and right
front speaker signals FR and FL modulated so as to be superimposed on infrared rays by the
surround signal transmitting unit 7 of the acoustic signal reproduction device 1 It is received by
the photo detector.
[0037]
The surround speaker 18 includes two speakers that separately output the left and right
surround speaker signals FR and FL.
[0038]
The surround connection unit 20 is configured such that the front connection unit 13 of the
front speaker reproduction device 2 can be detachably attached.
The front connection unit 13 is connected to the surround connection unit 20 in a state where
the front speaker reproduction device 2 and the surround speaker reproduction device 3 are
combined.
[0039]
In the surround speaker reproduction device 3 configured as described above, when combined
with the front speaker reproduction device 2, power is supplied from the front connection
portion 13 of the front speaker reproduction device 2 to the surround connection portion 20.
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Electric power is supplied from the surround connection unit 20 to the charger 19, and the
charger 19 is charged.
[0040]
When the surround speaker reproduction device 3 outputs sound from the surround speaker 18,
the left and right front speakers superimposed on the infrared light received by the surround
signal receiving unit 15 are powered by the charged charger 19. Sound is output from the
surround speaker 18 based on the signals FR and FL.
[0041]
When the front speaker reproduction device 2 and the surround speaker reproduction device 3
are combined with each other, the front connection portion 13 and the surround connection
portion 20 are stably connected, and the front speaker reproduction device 2 and the surround
speaker reproduction The device 3 is formed so as to be combined in a stable state, and it is
assumed that, for example, asperities which can be fitted to each other are formed.
[0042]
As described above, in the video disc playback apparatus, which is an example of the audio
playback apparatus according to the present invention, the audio signal playback apparatus 1
plays back the information signal recorded on the video disc mounted on the video disc playback
apparatus. An acoustic signal composed of a front speaker signal and a surround speaker signal
is formed from the reproduced information signal, the front speaker signal is sent to the signal
line 8, and the surround speaker signal is superimposed on infrared light. Wireless transmission.
The front speaker signal is acoustically output by the front speaker reproduction device 2
integrally provided in the acoustic signal reproduction device 1.
Further, the surround speaker signal superimposed on the infrared light is acoustically output by
the surround speaker reproducing device 3 disposed at a position separated from the sound
signal reproducing device 1 using the charged charger 19 as a power source.
[0043]
In the present embodiment, an example of a disc reproducing apparatus is shown as an audio
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reproducing apparatus, but the present invention is not limited to such a reproducing apparatus,
and may be a video tape reproducing apparatus, an audio tape reproducing apparatus, etc. The
same is applicable to other playback devices.
[0044]
Further, in the present embodiment, when the surround speaker signal is generated in the sound
signal reproduction unit, the case of superimposing on the infrared is shown, but the present
invention is not limited to the infrared frequency band, and the other The same applies to the
frequency band of
[0045]
Further, in the present embodiment, when charging the charger of the surround speaker
reproducing apparatus, a case is shown where power is supplied from the front speaker
reproducing apparatus, but the present invention is directed to the front as a power supply
source of the charger. The present invention is not limited to the speaker reproduction device,
and the present invention is similarly applicable to the case where power is supplied from a
power source or the like via an acoustic signal reproduction device or a surround speaker
reproduction device.
[0046]
As described above in detail, according to the sound reproducing apparatus of the present
invention, the charger is charged when the surround speaker reproducing apparatus is combined
with the front speaker reproducing apparatus, and the charging is performed. Using the battery
charger as a power source, the acoustic signal is output based on the acoustic signal wirelessly
transmitted from the acoustic signal reproduction device, and power is supplied from the same
place as the acoustic signal reproduction device in the front speaker reproduction device to
produce an acoustic output.
[0047]
As described above, since the surround speaker reproduction device does not have a signal line
and a distribution line, the beauty of the listening room is not impaired, and the maneuverability
of the surround speaker reproduction device is enhanced, and the surround speaker
reproduction device is preferred. It is possible to provide a highly realistic sound reproduction
device that can be easily installed in a place and easily obtain a desired sound field space.
[0048]
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In addition, when the surround speaker is not operated, the surround speaker reproduction
device is combined with the front speaker reproduction device and integrated, thereby providing
a sound reproduction device that has a small occupied area and further improves the appearance
of the listening room. It is possible.
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