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JP2013090303

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DESCRIPTION JP2013090303
PROBLEM TO BE SOLVED: To prevent a voice reproduced by a display speaker from being
delayed with respect to a voice connected to a voice processing device. SOLUTION: An AV
amplifier transmits a first delay means for delaying a first channel audio data by a delay time set
by a setting means, and transmits the delayed first channel audio data to a display device and
reproduces it from a display speaker. Means, second delay means for delaying the second
channel audio data by the delay time set by the setting means, playback means for playing back
the delayed second channel audio data from the speaker connected to the AV amplifier, display
Each delay time of the first delay means and the second delay means is set, and the delay time of
the second delay means is set. And setting means for adding time. [Selected figure] Figure 5
Audio processing device and display device
[0001]
The present invention relates to an audio processing apparatus, and more particularly to an
audio processing apparatus that reproduces multi-channel audio data from a speaker connected
to the audio processing apparatus and a display speaker provided in the display.
[0002]
An audio reproduction system provided with a BD player that is a source device compliant with
the HDMI standard, an AV amplifier that is a repeater device, and a display device that is a sink
device is used, and HDMI data output from the source device is video data And by including
audio data, it is possible to transmit both video data and audio data to the repeater device or the
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sink device by one HDMI cable.
The AV amplifier converts the HDMI data received from the BD player into the original video
data and audio data, amplifies the audio data and outputs it to the speaker, converts the video
data into HDMI data again, and transmits it to the display device . The display device converts the
received HDMI data into the original video data and displays it.
[0003]
Audio data included in HDMI data transmitted from the BD player to the AV amplifier is obtained
by encoding multi-channel audio data. For example, multi-channel audio data of 5.1 channels
including left audio data L, right audio data R, central audio data C, low-pass audio data SW,
surround left audio data SL, surround right audio data SR Is adopted. Also, recently, audio
formats related to HD (High Definition) such as Dolby True HD, Dolby Digital Plus, DTS-HD, etc.
have appeared, and in these formats, for example, surround back left audio data SBL, surround
back Right voice data SBR, upper left voice data Lh, upper right voice data Rh, left outer voice
data Lw, and right outer voice data Rw are further added.
[0004]
The following technology is described in Patent Document 1 below. In the AV amplifier, the
HDMI reception unit generates the original video data and the original multi-channel audio data
from the HDMI data received from the BD player, supplies the video data to the HDMI
transmission unit, and the audio processing unit Supply to The audio processing unit decodes
multi-channel audio data, supplies only the central audio data C to the HDMI transmission unit, D
/ A converts audio data of another channel, amplifies it, and outputs it to a speaker. The HDMI
transmitting unit generates HDMI data from the supplied video data and the central audio data C,
and transmits the HDMI data to the display device. The display device generates the original
video data and the central audio data C from the received HDMI data, displays the video, and
reproduces the central audio data C from a display speaker incorporated therein.
[0005]
Here, when the display device includes a DSP or a digital amplifier (switching amplifier or the
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like), the display device responds to the sound reproduced from the speaker connected to the AV
amplifier depending on the time taken for the audio processing in the DSP or digital amplifier.
There is a problem that the sound of the central audio data C reproduced by the display speaker
is considerably delayed. The present invention is not limited to the case where central audio data
C is reproduced using the display speaker of the display device, and audio data of other channels
(for example, upper left audio data Lh, upper right audio data Rh, etc.) The same problem arises
when playing back with a display speaker.
[0006]
JP 2007-288247 A
[0007]
The present invention has been made to solve the above-mentioned conventional problems, and
its object is to transmit audio data of a predetermined channel to a display device, and to
reproduce the display data from the display speaker provided in the display device. Abstract: An
audio processing apparatus is provided that prevents audio reproduced by a speaker from being
delayed with respect to audio reproduced from a speaker connected to the audio processing
apparatus.
[0008]
An audio processing apparatus according to a preferred embodiment of the present invention is
an audio processing apparatus connectable to a display device including a display speaker and a
plurality of speakers, wherein the first channel audio data included in the multi-channel audio
data is set. A first delay means for delaying by a delay time set by the means; a transmitting
means for transmitting the first channel audio data delayed by the first delay means to the
display device and reproducing the audio data from the display speaker; Second delay means for
delaying the second channel audio data contained in the channel audio data by the delay time set
by the setting means; and the second channel audio data delayed by the second delay means in
the audio processing Play from a speaker connected to the device Setting the delay time of each
of the first delay means and the second delay means, the reproduction means for causing the
display device to receive the display-side delay time relating to the audio processing of the
display device from the display device; And a setting unit configured to add a display-side delay
time for audio processing of the display device to the delay time of the second delay unit.
[0009]
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According to the present embodiment, the audio processing device acquires the display-side
delay time for audio processing of the display device from the display device, and adds the
display-side delay time to the delay time of the second delay means.
Therefore, it is possible to prevent the audio of the first channel audio data reproduced from the
display speaker from being delayed with respect to the audio of the second channel audio data
reproduced from the speaker connected to the audio processing device.
[0010]
In a preferred embodiment, whether to reproduce the first channel audio data from the display
speaker or to reproduce the first channel audio data from a speaker connected to the audio
processing device is switched according to a user operation. The apparatus further comprises
switching means, and when reproducing the first channel audio data from the display speaker, a
display side delay time for audio processing of the display device is added to the delay time of
the second delay means; When channel audio data is reproduced from a speaker connected to
the audio processing device, the display-side delay time for audio processing of the display
device is not added to the delay time of the second delay means.
[0011]
In this case, when the first channel audio data is reproduced not from the display speaker but
from a speaker connected to the audio processing device, the display side delay time for audio
processing of the display device is added to the delay time of the second delay means. Therefore,
the audio of the first channel audio data reproduced from the speaker connected to the audio
processing device is delayed with respect to the audio of the second channel audio data
reproduced from the speaker connected to the audio processing device. It can prevent.
[0012]
In a preferred embodiment, the display-side delay time is different for each sound processing of
the display device, and the setting means specifies the display-side delay time corresponding to
the currently set sound processing of the display device. Adding to the delay time of the second
delay means.
[0013]
In a preferred embodiment, a display-side delay time for the audio processing of the display
device and an audio processing of the audio processing device to be executed for the second
channel audio data without being executed for the first channel audio data The comparison
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means for comparing with the audio processing device side delay time, and when the display side
delay time is larger than the audio processing device side delay time, the audio processing device
side delay time is subtracted from the display side delay time to correct Calculation for
calculating the delay time for correction by subtracting the display side delay time from the
audio processing device side delay time when the audio processing device side delay time is
larger than the display side delay time And the display-side delay time is larger than the audio
processing device-side delay time. In the case where the setting means adds the delay time for
correction to the delay time of the second delay means, and the audio processing device side
delay time is larger than the display side delay time, the setting means performs the correction
Delay time is added to the delay time of the first delay means.
[0014]
A display apparatus according to a preferred embodiment of the present invention is a first delay
unit to which a plurality of speakers can be connected and which delays first channel audio data
included in multi-channel audio data by a delay time set by the setting unit; Transmission means
for transmitting the first channel audio data delayed by the first delay means to the display
device, and delaying second channel audio data included in the multi-channel audio data by the
delay time set by the setting means A second delay means, a reproduction means for reproducing
the second channel audio data delayed by the second delay means from a speaker connected to
the audio processing device, and a display-side delay for audio processing of the display device
Receive time from the display device Setting each delay time of the communication means, the
first delay means and the second delay means, and adding a display-side delay time for audio
processing of the display device to the delay time of the second delay means A display device to
which an audio processing device having setting means is connectable, the display speaker, an
audio receiving means for receiving the first channel audio data delayed by the first delay means,
and the first delay means Audio reproduction means for reproducing the first channel audio data
delayed by the display speaker from the display speaker, and information transmission means for
transmitting a display side delay time for audio processing of the display device to the audio
processing device.
[0015]
According to the present invention, when audio data of a predetermined channel is transmitted to
a display device and reproduced from a display speaker included in the display device, audio
reproduced by the display speaker of the display device is reproduced from a speaker connected
to the audio processing device. It is possible to provide a voice processing device that prevents
delaying with respect to the voiced voice.
[0016]
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It is a figure which shows the connection structure and installation position of a display
apparatus, AV amplifier, and a speaker.
FIG. 2 is a block diagram showing configurations of a display device, an AV amplifier, and a BD
player.
FIG. 2 is a block diagram showing an audio processing unit and the like of the AV amplifier.
It is a block diagram which shows the audio processing part etc. of a display apparatus.
It is a flowchart which shows AV amplifier and a display apparatus process.
It is a table which manages the delay time with respect to the sound processing of DSP.
It is a flowchart which shows AV amplifier and display apparatus processing.
It is a flowchart which shows AV amplifier and display apparatus processing.
[0017]
Hereinafter, an audio reproduction provided with a disc reproduction apparatus (source
apparatus, BD (Blu-ray Disc) player), an audio processing apparatus (repeater apparatus, AV
amplifier) and a display apparatus (sink apparatus, television receiver) according to a preferred
embodiment of the present invention The system is specifically described with reference to the
drawings, but the present invention is not limited to these embodiments.
In the present embodiment, although the case where the first channel audio data is the central
audio data C will be described as an example, the present invention is not limited to this. Any
other channel such as upper left audio data Lh and upper right audio data Rh is described. It may
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be In the present embodiment, the second channel audio data is audio data of a channel other
than the first channel audio data included in the multichannel audio data received by the AV
amplifier 20.
[0018]
FIG. 1 is a view for explaining an example of the arrangement of the AV amplifier 20, the display
device 30, and each speaker in the present embodiment (the description of the BD player 10 is
omitted). The display device 30 is provided with a display unit 32, a display left speaker SLD, and
a display right speaker SRD. The display device 30 is connected to the AV amplifier 20 via an
HDMI cable, and a left speaker SL, a right speaker SR, a center speaker SC, a low frequency
speaker SSW, a surround left speaker SSL, and a surround right speaker SSR are connected.
When the central audio data C is reproduced from the display left speaker SLD and the display
right speaker SRD, it is not necessary to connect the central speaker SC to the AV amplifier 20,
but this is described for reference.
[0019]
FIG. 2 is a block diagram showing the configuration of the BD player 10, the AV amplifier 20, and
the display device 30. As shown in FIG. The BD player 10, the AV amplifier 20, and the display
device 30 conform to, for example, the HDMI standard, and are mutually connected via an HDMI
cable.
[0020]
[Configuration of BD Player 10] The BD player 10 includes a reproduction unit 11, an HDMI
transmission unit 13, a control unit 14, an operation display unit 15, a memory (ROM, RAM, flash
memory, etc.) 16, and a connector unit 17 And.
[0021]
The playback unit 11 is a Blu-ray disc (hereinafter simply referred to as a disc).
) Is read out from the disc and supplied to the HDMI transmission unit 13. Also, the reproduction
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unit 11 reads the encoded multi-channel audio data recorded on the disc from the disc and
supplies the read data to the HDMI transmission unit 13. The reproduction unit 11 includes an
optical pickup, a servo circuit, an MPEG decoder, an audio decoder, and the like (not shown).
[0022]
The HDMI transmitting unit 13 refers to video data and audio data supplied from the
reproducing unit 11 as data of the HDMI standard (hereinafter referred to as HDMI data)
according to a command from the control unit 14. Convert to). The HDMI transmitting unit 13
transmits the HDMI data to the AV amplifier 20 via the HDMI cable via the connector unit 17.
The HDMI transmitting unit 13 is a TMDS line (generally, a plurality of lines are shown for
simplicity in FIG. 2) that transmit and receive HDMI data, and a hot plug for determining the
presence or absence of connection Are connected to the HDMI receiving unit 21 of the AV
amplifier 20. Also, the HDMI transmitting unit 13 is connected to the HDMI receiving unit 21 of
the AV amplifier 20 and the PROM via a DDC line for reading out the authentication information
and the EDID.
[0023]
The control unit 14 controls the reproduction unit 11, the HDMI transmission unit 13, the
operation display unit 15, the memory 16, and the like based on the operation program of the BD
player stored in the built-in or connected memory 16. For example, a microcomputer or a CPU.
The control unit 14 executes various processing based on the operation input from the operation
display unit 15 or the control signal and data from each unit.
[0024]
The control unit 14 is connected to the control unit 23 of the AV amplifier 20 via the CEC line,
and transmits / receives commands and / or data to / from the control unit 23.
[0025]
[Configuration of AV Amplifier 20] Next, the configuration of the AV amplifier 20 will be
described.
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The AV amplifier 20 includes an HDMI receiving unit 21, an HDMI transmitting unit 22, a control
unit 23, an operation display unit 24, a memory (ROM, RAM, flash memory etc.) 25, an audio
processing unit 26, and a connector unit 27. , And 28.
[0026]
The HDMI receiving unit 21 receives the HDMI data transmitted from the BD player 10,
generates the original video data (video data before HDMI conversion) from the received HDMI
data, and supplies the video data to the HDMI transmitting unit 22. Also, the HDMI receiving unit
21 generates original multi-channel audio data from the received HDMI data, and supplies the
generated multi-channel audio data to the audio processing unit 26.
[0027]
The audio processing unit 26 decodes multi-channel audio data supplied from the HDMI
receiving unit 21 and executes each processing such as sound processing, D / A conversion
processing, volume adjustment processing, amplification processing, etc., and is externally
connected. The audio signal of each channel is supplied to the speaker 60 (corresponding to each
speaker in FIG. 1). In addition, the audio processing unit 26 supplies the first channel audio data
to the HDMI transmitting unit 22 as necessary.
[0028]
Here, multi-channel audio data supplied to the audio processing unit 26 will be described. For
example, multi-channel audio data of 5.1 channels including left audio data L, right audio data R,
central audio data C, low-pass audio data SW, surround left audio data SL, surround right audio
data SR Is adopted. Also, recently, audio formats related to HD (High Definition) such as Dolby
True HD, Dolby Digital Plus, DTS-HD, etc. have appeared, and in these formats, for example,
surround back left audio data SBL, surround back Right voice data SBR, upper left voice data Lh,
upper right voice data Rh, left outer voice data Lw, and right outer voice data Rw are further
added.
[0029]
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FIG. 3 is a block diagram showing the configuration of the audio processing unit 26. As shown in
FIG. The audio processing unit 26 includes a DSP (digital signal processor) 41, a DAC (digitalanalog converter) 50, a volume adjustment unit 51, an amplification processing unit
(preamplifier, power amplifier etc.) 52, and a conversion unit 53. Have.
[0030]
The DSP 41 decodes multi-channel audio data supplied from the HDMI receiving unit 21 and
decodes the decoded audio data of each channel (for example, left audio data L, right audio data
R, central audio data C, low-pass audio data SW , Surround left audio data SL, surround right
audio data SR, and the like. Generate). Among these audio data, left audio data L, right audio data
R, central audio data C, surround left audio data SL, and surround right audio data SR are
respectively converted to corresponding HPFs (high pass filters) 42a to 42e. It is supplied to
LPFs (low pass filters) 44a to 44e.
[0031]
The HPFs 42a to 42e respectively extract high frequency components of audio data of a supplied
channel, and supply the extracted high frequency components to the delay means 43a to 43e.
The delay units 43a to 43e delay the audio data of the supplied channel by the delay time
determined by the control unit 23, and supply the delayed data to the subsequent stage. That is,
the delay means 43a supplies the left audio data L to the addition means 48a, the delay means
43b supplies the right audio data R to the addition means 48b, and the delay means 43c
transmits the central audio data C to the switch means 49. The delay means 43d supplies
surround left audio data SL to the DAC 50, and the delay means 43e supplies surround right
audio data SR to the DAC 50.
[0032]
The LPFs 44a to 44e respectively extract low frequency components of the audio data of the
supplied channel, and supply the low frequency components to the attenuation means 45a. The
attenuation means 45a attenuates the supplied audio data of each channel by -20 dB and
supplies the same to the addition means 46. The attenuation means 45 b receives the low-pass
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speech data SW, attenuates the low-pass speech data SW by −10 dB, and supplies the same to
the addition means 46. The addition means 46 adds the low frequency components of the left
audio data L, the right audio data R, the center audio data C, the surround left audio data SL, and
the surround right audio data SR to be supplied to the low-pass audio data SW supplied. The lowpass audio data SW after addition and addition is supplied to the delay means 43f.
[0033]
The delaying means 43f delays the low-pass audio signal SW supplied from the adding means 46
by the delay time determined by the control unit 23, and supplies the delayed signal to the
adding means 48a, 48b and the amplifying means 47. The addition means 48a adds the low-pass
audio data SW supplied from the delay means 43f to the left audio data L supplied from the
delay means 43a, and supplies the left audio data L after addition to the DAC 50. The addition
means 48b adds the low-pass audio data SW supplied from the delay means 43f to the right
audio data R supplied from the delay means 43b, and supplies the right audio data R after the
addition to the DAC 50. The amplification unit 47 amplifies the low-pass audio data SW supplied
from the delay unit 43 f by 20 dB, and supplies the amplified low-pass audio data SW to the DAC
50.
[0034]
The switch unit 49 switches whether to supply the central audio data C supplied from the delay
unit 43 c to the DAC 50 or to the converter 53 based on an instruction from the control unit 23.
That is, when the central audio data C is reproduced by the speaker 37 of the display device 30,
the switch means 49 is switched to the lower side so as to supply the central audio data C to the
converter 53, and the central audio data C is When playing with the central speaker SC
connected to 20, the switch means 49 is switched upward to supply the central audio data C to
the DAC 50.
[0035]
The DAC 50 performs digital-to-analog conversion on audio data of each channel supplied from
the DSP 41, and supplies an analog audio signal of each channel to the volume adjustment unit
51. The DAC 50 is provided for each channel.
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[0036]
The volume adjustment unit 51 adjusts the volume value of the analog audio signal of each
channel and supplies the volume value to the amplification processing unit 52. The volume
adjustment unit 51 is provided with a volume adjustment circuit such as a variable resistor for
each channel.
[0037]
The amplification processing unit 52 amplifies the audio signal of each channel supplied from
the volume adjustment unit 51, and outputs the amplified audio signal to the speaker of each
channel via the speaker output terminal of each channel. The amplification processing unit 52 is
provided with an amplification circuit for each channel.
[0038]
The converter 53 is supplied with central audio data C from the switch means 49. Further, the
conversion unit 53 is supplied with the bit clock BCLK, the master clock MCLK and the LR clock
LRCLK from the DSP 41. The converting unit 53 converts the central audio data C into audio data
of SPDIF (PCM) based on each clock, and supplies the audio data to the HDMI transmitting unit
22.
[0039]
Returning to FIG. 2, the HDMI transmitting unit 22 converts the video data supplied from the
HDMI receiving unit 21 and the central audio data C supplied from the converting unit 53 of the
audio processing unit 26 into HDMI data. The HDMI transmitting unit 22 transmits the converted
HDMI data to the HDMI receiving unit 31 of the display device 30.
[0040]
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The HDMI transmitting unit 22 is connected to the HDMI receiving unit 31 of the display device
30 via the TMDS line and the hot plug. Also, the HDMI transmitting unit 22 is connected to the
PROM of the display device 30 and the HDMI receiving unit 31 via the DDC line.
[0041]
The control unit 23 controls the HDMI reception unit 21, the HDMI transmission unit 22, the
operation display unit 24, the audio processing unit 26, and the like based on the operation
program of the AV amplifier 20 stored in the built-in or connected memory 25. For example, a
microcomputer, a CPU, or the like. The control unit 23 executes various processes based on the
operation input from the operation display unit 24 or the control signal and data from each unit.
[0042]
Control unit 23 determines whether an instruction to reproduce central audio data C from
speaker 37 of display device 30 has been input in accordance with a user operation. When an
instruction to reproduce is input from the speaker 37 of the display device 30, the control unit
23 switches the switch unit 49 to the lower side and supplies the central audio data C to the
conversion unit 53. On the other hand, when an instruction to reproduce the central audio data C
is input from the central speaker SC connected to the AV amplifier 20, the control unit 23
switches the switch means 49 upward to supply the central audio data C to the DAC 50. .
[0043]
The control unit 23 is connected to the control unit 14 of the BD player 10 via the CEC line, and
transmits / receives commands and data to / from the control unit 14. Further, the control unit
23 is connected to the control unit 33 of the display device 30 via the CEC line, and transmits
and receives commands and data to and from the control unit 33.
[0044]
The control unit 23 receives time (delay time) information concerning the audio processing of
the audio processing unit 36 of the display device 30 from the control unit 33 of the display
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device 30. The delay time is, for example, the time taken for the audio processing of the DSP or
the digital amplifier in the audio processing unit of the display device 30. The control unit 23
delays each of audio data (left audio data L, right audio data R, low-pass audio data SW, surround
left audio data SL, surround right audio data SR) of all channels other than the central audio data
C. The delay time required for the audio processing of the audio processing unit 36 of the display
device 30 is added to the delay time of.
[0045]
Specifically, the delay time of the audio data of each channel is originally calculated based on the
speaker arrangement (the arrangement of the display speaker for the central audio data C) and
the position of the listener, and the delay time of the delay means is calculated for each delay
means. Delay time of the audio processing unit 36 of the display device 30 during the delay time
of the delay unit corresponding to the channel excluding the central audio data C (display The
side delay time is further added. As a result, it is possible to prevent the delay of the sound
reproduced from the display speaker of the display device 30 from the sound reproduced from
the speaker connected to the AV amplifier 20.
[0046]
In the present embodiment, the delay time taken by the audio processing of the DSP 41 of the
audio processing unit 26 of the AV amplifier is not a problem because the same delay time is
generated for all channels including the central audio data C. Further, in the present embodiment,
since the amplification processing unit 52 of the AV amplifier 20 employs an analog amplifier,
unlike the amplification processing unit included in the display 30, no delay time is generated. In
addition, the time taken for the HDMI conversion process in the HDMI transmission unit 22 of
the AV amplifier 20 and the HDMI reception unit 31 of the display device 30 is extremely short
enough to be neglected, so there is no problem even without consideration.
[0047]
[Configuration of Display Device 30] Next, the display device 30 will be described with reference
to FIG. 2 again. The display device 30 includes an HDMI receiving unit 31, a display unit 32, a
control unit 33, a memory (ROM, RAM, flash memory etc.) 34, an operation unit 35, an audio
processing unit 36, a speaker 37 (FIG. (Corresponding to the display left speaker SLD and the
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display right speaker SRD), and the connector portion 38.
[0048]
The HDMI receiving unit 31 receives the HDMI data transmitted from the HDMI transmitting unit
22 of the AV amplifier 20, generates the original video data from the HDMI data, and supplies
the video data to the display unit 32. Also, the HDMI receiving unit 31 generates original audio
data from the HDMI data, and supplies the original audio data to the audio processing unit 36.
The audio data is SPDIF (PCM) data including central audio data C as described above.
[0049]
The audio processing unit 36 executes audio processing supplied from the HDMI receiving unit
31 such as sound processing, D / A conversion processing, volume adjustment processing,
amplification processing, and the like, and supplies the processed data to the speaker 37. FIG. 4
is a block diagram showing a schematic configuration of the audio processing unit 36. As shown
in FIG. The audio processing unit 36 includes a DSP (digital signal processor) 55 and / or a digital
amplifier (for example, a switching amplifier, a class D amplifier, a 1-bit digital amplifier, etc.) 56.
[0050]
The DSP 56 performs audio processing and decoding processing on the audio data supplied from
the HDMI receiving unit 31 and supplies the audio data to the digital amplifier 56. The digital
amplifier 56 amplifies audio data supplied from the DSP 55, converts the audio data into an
analog signal by an LPF or the like, and outputs the audio signal to a speaker. That is, the central
audio data C is reproduced from the display left speaker SLD and the display right speaker SRD.
As described above, a predetermined delay time occurs in the audio processing in the DSP 55
and the digital amplifier 56.
[0051]
Returning to FIG. 2, the display unit 32 is supplied with video data from the HDMI receiving unit
31 and displays a video based on the video data, and is, for example, an LCD or a PDP.
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[0052]
The control unit 33 controls the HDMI receiving unit 31, the display unit 32, the audio
processing unit 36, and the like based on the operation program of the display apparatus stored
in the built-in or connected memory 34. For example, a microcomputer And CPU etc.
The control unit 33 executes various processing based on the operation input from the operation
unit 35 or the control signal and data from each unit.
[0053]
In the memory 34, delay time information concerning the audio processing of the DSP 55 and
the digital amplifier 56 is stored in advance. The control unit 33 transmits delay time information
concerning the audio processing to the control unit 23 of the AV amplifier 20 via the CEC line.
[0054]
When receiving the volume setting command from the control unit 23 of the AV amplifier 20, the
control unit 33 controls the volume value based on the volume value included in the volume
setting command. When the control of the volume value is completed, the control unit 33
transmits a volume setting completion notification to the control unit 23 of the AV amplifier 20
via the CEC line. This is to urge the AV amplifier 20 to start transmission of HDMI data including
the central audio data C.
[0055]
[Operation of Audio Reproduction System] Hereinafter, the operation of the present invention
will be described with reference to the flowchart of FIG. As shown in FIG. 5, the control unit 23 of
the AV amplifier 20 determines whether the display device 30 is connected to the AV amplifier
20 (S101). If it is connected (YES in S101), the control unit 23 requests the control unit 33 of the
display device 30 for delay time information concerning audio processing via the CEC line
(S102). When the control unit 33 of the display device 30 receives the request for delay time
information for audio processing, it reads the delay time information for audio processing from
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the memory 34 and transmits the information to the AV amplifier 20 via the CEC line (S201 ).
The control unit 23 of the AV amplifier 20 receives the delay time information concerning the
audio processing via the CEC line, and stores it in the memory 25 (S102).
[0056]
The control unit 23 determines whether or not an instruction to reproduce the central audio data
C is input using a speaker of the display device 30 by a user operation (S103). When it is input
(YES in S103), the delay time for the audio processing received from display device 30 is added
to the delay time set in each delay means corresponding to audio data of channels other than
central audio data C (S104). That is, the display device is operated during the delay time of the
delay means 43a, 43b, 43d, 43e, 43f corresponding to the left audio data L, right audio data R,
low band audio data SW, surround left audio data SL, and surround right audio data SR. Add the
delay time on the side. Subsequently, the control unit 23 switches the switch means 49 to the
lower side (S105). Therefore, the central audio data C is supplied to the conversion unit 53 and
converted to the SPDIF format, converted to HDMI data by the HDMI transmission unit 22, and
transmitted to the HDMI reception unit 31 of the display device 30. The HDMI reception unit 31
of the display device 30 receives the HDMI data, generates central audio data C, and the central
audio data C is reproduced from the speaker 37 via the audio processing unit 36.
[0057]
At this time, the delay time for the audio processing received from the display device 30 is added
to the delay time set in each delay means corresponding to the audio data of the channels other
than the central audio data C. It is possible to prevent the audio of the central audio data C
reproduced from the speaker 37 from being delayed with respect to the audio of the other
channel reproduced from the speaker connected to the AV amplifier 20. This is because the
audio of the other channel reproduced from the speaker connected to the AV amplifier 20 can be
delayed by the same amount as the audio of the central audio data C reproduced from the
speaker 37 of the display device 30.
[0058]
On the other hand, when an instruction not to use the speaker 37 of the display device 30 (that
is, using the central speaker SC connected to the AV amplifier 20) is input by user operation in
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17
S103 (NO in S103), the control unit 23 The delay time for the audio processing received from the
display device 30 is not added to the delay time set in each delay means corresponding to audio
data of channels other than the central audio data C. That is, the control unit 23 sets the delay
time of the delay means of each channel only to the delay time determined by the usual method
(speaker arrangement and position of listener) (S106). The control unit 23 switches the switch
means 49 upward (S107). Therefore, the central audio data C is reproduced from the speaker SC
connected to the AV amplifier 20.
[0059]
Here, the delay time for the audio processing received from the display device 30 is not added to
the delay time set in each delay means corresponding to the audio data of the channels other
than the central audio data C. It is possible to prevent the sound reproduced from the speakers of
the channel other than the connected central speaker SC from being delayed with respect to the
sound reproduced from the central speaker SC connected to the AV amplifier 20.
[0060]
As described above, according to the present embodiment, the delay time for the audio
processing of the display device 30 is added to the delay time of the delay means of the audio
data of the channel other than the central audio data C reproduced by the display speaker. The
sound reproduced from the speaker can be prevented from being delayed with respect to the
sound reproduced from the speaker connected to the AV amplifier 20.
In the present embodiment, when the central audio data C is necessarily reproduced from the
speaker 37 of the display device 30 without providing the switch means 49, each process of
S103, S105, S106, S107 in the flowchart of FIG. Should be omitted.
[0061]
Next, another preferred embodiment of the present invention will be described. In the present
embodiment, a plurality of types of sound processing of the DSP 55 of the display device 30
exist, and the delay times differ according to the types. In the memory 34 of the display device
30, a delay time table shown in FIG. 6 is stored in advance. In the delay time table, delay time
information is registered in association with the acoustic processing of the DSP 55.
09-05-2019
18
[0062]
FIG. 7 is a flowchart showing the operation of this embodiment. The control unit 23 of the AV
amplifier 20 determines whether the display device 30 is connected to the AV amplifier 20
(S151). If connected (YES in S151), the control unit 23 requests the control unit 33 of the display
device 30 for delay time information for audio processing via the CEC line (S152). When the
control unit 33 of the display device 30 receives the request for delay time information for audio
processing, the control unit 33 reads out from the memory 34 the delay time information for the
audio processing for each audio processing (that is, the table of FIG. 6). The AV amplifier 20 is
transmitted to the AV amplifier 20 via the (S251). The control unit 23 of the AV amplifier 20
receives, via the CEC line, the delay time information concerning the audio processing for each
audio processing, and stores the information in the memory 25 (S152).
[0063]
The control unit 33 of the display device 30 identifies the type of acoustic processing set in the
DSP 55, and transmits the identified type of acoustic processing to the control unit 23 of the AV
amplifier 20 via the CEC line (S252) . The control unit 23 of the AV amplifier 20 receives the
type of sound processing set in the DSP 55 (S153), and specifies the delay time corresponding to
the type of sound processing received from among the delay times received in S152, Save to
memory This processing is executed each time the type of sound processing is changed by the
user operation. That is, each time the type of audio processing is changed by the user operation,
the delay time to be added to the delay time of each delay means by the control unit 23 of the AV
amplifier 20 is changed.
[0064]
The control unit 33 of the display device 30 specifies the delay time corresponding to the
specified acoustic processing from the table of FIG. 6, and transmits the specified delay time
information to the control unit 23 of the AV amplifier 20 via the CEC line. You may do so. In this
case, it is not necessary to save the table of FIG. 6 on the AV amplifier 20 side.
[0065]
09-05-2019
19
Control unit 23 determines whether or not an instruction to reproduce central audio data C is
input using a speaker of display device 30 by a user operation (S154). When it is input (YES in
S154), the delay time set in each delay means corresponding to audio data of channels other
than central audio data C corresponds to the current acoustic processing of display device 30
specified in S153. The delay time is added (S155). The control unit 23 switches the switch means
49 to the lower side (S156). Therefore, the central audio data C is supplied to the conversion unit
53 and converted to the SPDIF format, converted to HDMI data by the HDMI transmission unit
22, and transmitted to the HDMI reception unit 31 of the display device 30. The HDMI reception
unit 31 of the display device 30 receives the HDMI data, generates central audio data C, and the
central audio data C is reproduced from the speaker 37 via the audio processing unit 36.
[0066]
At this time, the display apparatus 30 adds the delay time corresponding to the current sound
processing of the display apparatus 30 to the delay time set in each delay means corresponding
to the audio data of the channels other than the middle central audio data C. It is possible to
prevent the sound of the central audio data C reproduced from the 30 speakers 37 from being
delayed with respect to the sound of the other channel reproduced from the speaker connected
to the AV amplifier 20.
[0067]
On the other hand, when an instruction not to use the speaker 37 of the display device 30 (that
is, using the central speaker SC connected to the AV amplifier 20) is input by the user operation
in S154 (NO in S154), the control unit 23 The delay time corresponding to the current audio
processing of the display device 30 is not added to the delay time set in each delay means
corresponding to the audio data of the channels other than the central audio data C.
That is, the control unit 23 sets the delay time of the delay means of each channel to the delay
time determined by the normal method (the speaker arrangement and the position of the
listener) (S157). The control unit 23 switches the switch means 49 upward (S158). Therefore, the
central audio data C is reproduced from the speaker SC connected to the AV amplifier 20.
[0068]
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20
Next, still another preferred embodiment of the present invention will be described. In the
present embodiment, it is assumed that a delay time occurs in audio processing other than the
DSP 41 in the audio processing unit 26 because the amplification processing unit 52 of the AV
amplifier 20 is realized by a digital amplifier. In this case, the delay time is set considering not
only the delay time for the audio processing of the display device 30 but also the delay time for
the audio processing of the AV amplifier 20 other than the DSP 41. The delay time for the audio
processing of the AV amplifier 20 other than the DSP 41 is a delay time that occurs only in the
audio processing for the audio data of the other channels excluding the central audio data C. It is
stored.
[0069]
FIG. 8 is a flowchart for explaining the operation of this embodiment. The control unit 23 of the
AV amplifier 20 determines whether the display device 30 is connected to the AV amplifier 20
(S171). If connected (YES in S171), the control unit 23 requests the control unit 33 of the display
device 30 for delay time information for audio processing via the CEC line (S172). When the
control unit 33 of the display device 30 receives the request for delay time information for audio
processing, it reads the delay time information for audio processing from the memory 34, and
transmits the information to the AV amplifier 20 via the CEC line (S271) ). The control unit 23 of
the AV amplifier 20 receives the delay time information concerning the audio processing via the
CEC line, and stores the information in the memory 25 (S172).
[0070]
Control unit 23 determines whether or not an instruction to reproduce central audio data C is
input using a speaker of display device 30 by a user operation (S173). If it is input (YES in S173),
it is determined whether the delay time for the audio processing of the display device 30 is larger
than the delay time for the audio processing of the AV amplifier 20 other than the DSP (S174). If
it is larger (YES in S174), the control unit 23 subtracts the delay time of the audio processing of
the AV amplifier 20 other than the DSP from the delay time of the audio processing of the
display device 30, and calculates the delay time for correction. (S175).
[0071]
The control unit 23 adds the delay time for correction calculated in S175 to the delay time set in
09-05-2019
21
each delay means corresponding to the audio data of the channel other than the central audio
data C (S176). The control unit 23 switches the switch means 49 to the lower side (S177).
Therefore, the central audio data C is supplied to the conversion unit 53 and converted to the
SPDIF format, converted to HDMI data by the HDMI transmission unit 22, and transmitted to the
HDMI reception unit 31 of the display device 30. The HDMI reception unit 31 of the display
device 30 receives the HDMI data, generates central audio data C, and the central audio data C is
reproduced from the speaker 37 via the audio processing unit 36.
[0072]
At this time, the delay time for correction calculated in S175 is added to the delay time set in
each delay means corresponding to audio data of channels other than the central audio data C,
from the speaker 37 of the display device 30. It is possible to prevent the sound of the central
audio data C to be reproduced from being delayed with respect to the sound of the other channel
reproduced from the speaker connected to the AV amplifier 20.
[0073]
On the other hand, when it is determined in S174 that the size is not large (NO in S174), the
control unit 23 subtracts the delay time for the audio processing of the display device 30 from
the delay time for the audio processing of the AV amplifier 20 other than the DSP. The delay time
for correction is calculated (S178).
[0074]
The control unit 23 adds the delay time for correction calculated in S178 to the delay time set in
the delay means corresponding to the central audio data C (S179).
The control unit 23 switches the switch means 49 to the lower side (S177).
At this time, the delay time for correction calculated in S178 is added to the delay time set in the
delay means corresponding to the central audio data C, so that the signal is reproduced from the
speaker connected to the AV amplifier 20. The sound of the channel C can be prevented from
being delayed with respect to the sound of the central sound data C reproduced from the speaker
37 of the display device 30.
09-05-2019
22
[0075]
On the other hand, when an instruction not to use the speaker 37 of the display device 30 (that
is, using the central speaker SC connected to the AV amplifier 20) is input by user operation in
S173 (NO in S173), the control unit 23 The delay time for the audio processing received from the
display device 30 is not added to the delay time set in each delay means corresponding to audio
data of channels other than the central audio data C. That is, the control unit 23 sets the delay
time of the delay means of each channel to the delay time determined by the normal method (the
speaker arrangement and the position of the listener) (S180). The control unit 23 switches the
switch means 49 upward (S181). Therefore, the central audio data C is reproduced from the
speaker SC connected to the AV amplifier 20.
[0076]
Although the preferred embodiments of the present invention have been described above, the
present invention is not limited to these embodiments. The function of the BD player 10 may be
included in the AV amplifier 20, and in this case, the HDMI receiving unit 21 becomes
unnecessary. Also, the AV amplifier 20 may receive HDMI data from a receiver such as a TV
tuner or a radio tuner instead of the BD player 10. Also, the audio data to be transmitted to the
display device may be transmitted by an optical digital cable or the like instead of being
transmitted through the HDMI cable. In this case, frequency characteristic information may be
transmitted separately via another communication cable. That is, the frequency characteristic
information may be transmitted by another communication method (USB, IEEE1304, etc.) higher
than CEC. The program may also be provided in the form of a program for causing a computer to
execute the above operation of the AV amplifier and a recording medium having the program
recorded thereon. Also, the program for only a part of the above operation of the AV amplifier
may be provided to the AV amplifier in the form of firmware update. Furthermore, the program
may be provided in the form of an electronic component such as a DSP or a microcomputer in
which a program of only a part of the above operation of the AV amplifier is stored.
[0077]
The present invention can be suitably adopted for an AV amplifier and the like.
[0078]
DESCRIPTION OF SYMBOLS 10 BD player 11 Reproduction unit 13 HDMI transmission unit 14
Control unit 15 Operation display unit 16 Memory 17 Connector unit 20 AV amplifier 21 HDMI
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reception unit 22 HDMI transmission unit 23 Control unit 24 Operation display unit 25 Memory
26 Audio processing unit 27 Connector unit 28 Connector unit 30 Display device 31 HDMI
receiving unit 32 Display unit 33 Control unit 34 Memory 35 Operation unit 36 Audio
processing unit 37 Display speaker 38 Connector unit 41 DSP 42a to 42e HPF 43a to 43e
Delaying means 44a to 44e LPF 45a to 45b Attenuating means 46 addition means 47
amplification means 48a to 48b addition means 49 switch means 50 DAC 51 volume adjustment
unit 52 amplification processing unit 55 DSP 56 DAC 57 volume adjustment unit 58
amplification processing unit
09-05-2019
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