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DESCRIPTION JP2009296462
PROBLEM TO BE SOLVED: To appropriately control the direction of a speaker provided in a sink
device when reproducing audio data of a certain channel from a speaker provided in the sink
device. SOLUTION: An AV amplifier 20 is set in a speaker setting table, and a rotation angle of a
sink speaker based on the distance from the viewing position to the sink speaker and the height
from the viewing position of the sink speaker. Is calculated and transmitted to the sink device via
the CEC line. The sink device rotates the sink speaker by the rotation angle based on the received
information on the rotation angle. Therefore, the direction of the sink speaker can be
automatically directed to the viewing position. [Selected figure] Figure 10
Voice reproduction system, voice processing device, sink device and program thereof
[0001]
The present invention relates to an audio reproduction system for reproducing multi-channel
audio data.
[0002]
An audio reproduction system including a DVD player that is a source device compliant with the
HDMI standard, an AV amplifier that is a repeater device, and a projector or display device that is
a sink device is used, and HDMI data output from the source device is used. By including video
data and audio data, one HDMI cable can transmit both video data and audio data to the repeater
device.
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The AV amplifier converts the HDMI data received from the DVD player into the original video
data and audio data, amplifies the audio data and outputs it to a speaker, converts the video data
into HDMI data again, and transmits it to the projector. The projector converts the received
HDMI data into the original video data and projects it on the screen.
[0003]
The audio data included in the HDMI data transmitted from the DVD player to the AV amplifier is
the multichannel audio data encoded. For example, as shown in FIG. 17, multi-channel audio data
includes 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 surround back The 7.1ch multichannel audio data including the left audio data SBL and the surround back right audio data SBR
is adopted.
[0004]
However, in order to reproduce audio data of each channel of these multi-channel audio data, it
is necessary to connect eight speakers to an AV amplifier via a speaker cable. Therefore, the user
needs to prepare eight speakers, which is costly. Also, in general, the AV amplifier is disposed in
front of the user (viewing position), so in order to connect the AV amplifier with the surround
back left speaker SSBL and the surround back right speaker SSBR, the inside of the room is
viewed from the front It is necessary to route the speaker cable toward the rear, which is
cumbersome and does not look good.
[0005]
The following techniques have been proposed to solve this problem. The AV amplifier transmits
HDMI data including the surround back left audio data SBL and the surround back right audio
data to the projector. The projector reproduces the surround back left audio data SBL included in
the received HDMI data from the projector left speaker, and reproduces the surround back right
audio data SBR from the projector right speaker. Thereby, the surround back left audio data SBL
and the surround back right audio data SBR can be reproduced without arranging the surround
back left speaker SSBL and the surround back right speaker SSBR.
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[0006]
Here, the surround back left audio data SBL and the surround back right audio data SBR may
include high frequency components, and the high frequency components have a feature that the
directivity is narrow. Therefore, the direction of the diaphragm of the speaker provided in the
projector (the direction of the sound wave) is very important, and the speaker needs to be
directed to the viewing position (the user's ear). However, in the above technology, no
consideration is given to the orientation of the speaker.
[0007]
JP 2007-288247 A
[0008]
The present invention has been made to solve the above-described conventional problems, and
its object is to provide an orientation of a speaker provided in a sink device when reproducing
audio data of a certain channel from a speaker provided in the sink device. Providing an audio
reproduction system capable of appropriately controlling
[0009]
An audio reproduction system according to a preferred embodiment of the present invention
includes a sink device having one or more sink speakers, and an audio processing device to
which the sink device and one or more speakers can be connected.
Transmission means for transmitting to the sink device the first channel audio data contained in
the input multi-channel audio data, and the audio data other than the first channel audio data
contained in the multi-channel audio data A speaker setting means for setting a first
reproduction unit that supplies the one or more speakers, a distance from a viewing position to
the sink speaker, and a height from the viewing position of the sink speaker; Calculation means
for calculating the rotation angle of the sink speaker based on the distance from the speaker to
the sink speaker and the height from the viewing position of the sink speaker, and the rotation
calculated by the calculation means And angle information transmitting means for transmitting
angle information to the sink device.
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Receiving means for receiving the first channel audio data transmitted from the audio processing
device; second reproducing means for supplying the received first channel audio data to the
speaker for the sink; Angle information receiving means for receiving information on the rotation
angle transmitted from the processing device; and speaker rotation control means for rotating
the sink speaker by the rotation angle based on the received information on the rotation angle
Have.
[0010]
In the audio processing apparatus, the rotation angle of the sink speaker is calculated based on
the distance from the viewing position set by the speaker setting unit to the sink speaker and the
height from the viewing position of the sink speaker. Information of the calculated rotation angle
is transmitted to the sink device. In the sink device, the sink speaker is rotated by the rotation
angle based on the received information of the rotation angle. Therefore, the direction of the sink
speaker can be automatically directed to the viewing position.
[0011]
Preferably, the sink device determines whether or not the pivot angle is within the range of the
maximum pivotable angle of the sink speaker based on the received information on the pivot
angle. Means, and notification transmitting means for transmitting an abnormality notification
indicating that rotation is not possible to the voice processing device when the rotation angle
exceeds the range of the maximum rotation angle of the sink speaker The voice processing
apparatus further includes: notification receiving means for receiving the abnormality
notification; and a distance from a viewing position to the sink speaker when the abnormality
notification is received, and the viewing position of the sink speaker And a notification means for
notifying the user to change at least one of the height from the display.
[0012]
When the calculated rotation angle exceeds the range of the maximum rotation angle of the sink
speaker, the distance from the viewing position to the sink speaker and the height from the
viewing position of the sink speaker Inform the user to change at least one of the two.
By changing at least one of these according to the notification according to the user operation, a
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new rotation angle is calculated, and the sink speaker can be rotated at the new rotation angle.
[0013]
Preferably, when the sink device is disposed behind the viewing position, the calculating means
sets the rotation angle θ as follows: sin θ = the height of the sink speaker from the viewing
position / the viewing position Calculated by the distance to the speaker.
[0014]
Preferably, in the case where the sink device is disposed in front of the viewing position, the
calculating unit sets the rotation angle θ to θ = 180−θ ′ (wherein sin θ ′ = the viewing
position of the sink speaker) The distance from the height / viewing position to the sink speaker)
is calculated.
[0015]
An audio reproduction system according to another preferred embodiment of the present
invention includes a sink device having one or more sink speakers, and an audio processing
device to which the sink device and one or more speakers can be connected.
Placement management means for managing the placement relationship between the sink device
and the viewing position; placement determination means for determining whether the sink
device is in front of or behind the viewing position; When it is determined that the sink device is
ahead of the viewing position, the second channel audio data included in the input multi-channel
audio data is transmitted to the sink device, and the sink device is behind the viewing position
Transmitting means for transmitting the first channel audio data included in the multi-channel
audio data to the sink device when it is determined that the audio data is other than the audio
data transmitted by the transmitting means included in the multi-channel audio data. First
reproduction means for supplying audio data to the one or more speakers; and the speaker for
the sink from the viewing position Speaker setting means for setting the distance between the
viewing position and the height of the sink speaker from the viewing position, the distance from
the viewing position to the sink speaker, and the height from the viewing position of the sink
speaker And calculating means for calculating a rotation angle of the speaker for sink, and angle
information transmission means for transmitting information of the rotation angle calculated by
the calculation means to the sink device.
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A receiving unit for receiving the first channel audio data or the second channel audio data
transmitted from the audio processing device; and the sink device receiving the first channel
audio data or the second channel audio data. Based on the information on the second rotation
means supplied to the sink speaker, the angle information reception means for receiving the
information on the rotation angle transmitted from the voice processing device, and the
information on the received rotation angle, And a speaker rotation control unit configured to
rotate by the rotation angle.
[0016]
In the audio processing apparatus, the rotation angle of the sink speaker is calculated based on
the distance from the viewing position to the sink speaker and the height from the viewing
position of the sink speaker, which are set by the speaker setting unit. . Information of the
calculated rotation angle is transmitted to the sink device. The sink device is rotated by the
rotation angle received by the sink speaker based on the received information on the rotation
angle. Therefore, the direction of the sink speaker can be automatically directed to the viewing
position.
[0017]
Hereinafter, an audio reproduction system including a DVD player (source device, reproduction
device), an AV amplifier (repeater device, audio processing device) and a projector (sink device)
according to a preferred embodiment of the present invention will be specifically described with
reference to the drawings. Although described, the present invention is not limited to these
embodiments.
[0018]
FIG. 1 is a diagram for explaining the arrangement and connection configuration of the AV
amplifier 20, the projector 30, and each speaker in the present embodiment (the DVD player 10
and the screen are omitted).
FIG. 2 is an external view showing the projector 30. As shown in FIG. The projector 30 is
provided with a projection unit 32, a projector left speaker SLP, and a projector right speaker
SRP. The projector left speaker SLP and the projector right speaker SRP are positions where the
direction of the diaphragm is perpendicular to the floor (downward) from the position where the
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direction of the diaphragm is parallel to the floor (forward) by the speaker rotation control unit
described later It is pivotable toward the The projector 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. The
surround back left speaker SSBL and the surround back right speaker SSBR may not be arranged.
[0019]
FIG. 3 is a block diagram showing the configuration of the DVD player 10, the AV amplifier 20,
and the projector 30. As shown in FIG. The DVD player 10, the AV amplifier 20, and the projector
30 conform to, for example, the HDMI standard, and are mutually connected via an HDMI cable.
[0020]
[Configuration of DVD Player 10] The DVD player 10 includes a reproduction unit 11, an HDMI
transmission unit 13, a system control unit 14, an operation display unit 15, a memory 16, and a
connector unit 17.
[0021]
The playback unit 11 is a DVD disc (hereinafter simply referred to as a disc).
) And the encoded multi-channel audio data are read from the disc and supplied to the HDMI
transmitting 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 system control unit 14. Convert to). The HDMI transmitting
unit 13 transmits the HDMI data to the AV amplifier 20 via the connector unit 17.
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[0023]
The HDMI transmitting unit 13 transmits the HDMI data via the TMDS line for transmitting and
receiving HDMI data, the DDC line for reading authentication information and EDID, and the hot
plug line for determining the presence or absence of connection, the HDMI receiving unit 21 of
the AV amplifier 20. Connected to
[0024]
The system 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 DVD player stored in the built-in or connected memory. For example, a microcomputer or a
CPU.
The system control unit 14 executes various processes based on the operation input from the
operation display unit 15 or the control signal and data from each unit. The system control unit
14 is connected to the system control unit 23 of the AV amplifier 20 via the CEC line, and
transmits / receives commands and / or data to / from the system control unit 23.
[0025]
[Configuration of AV Amplifier] The AV amplifier 20 includes the HDMI receiving unit 21, the
HDMI transmitting unit 22, the system control unit 23, the operation display unit 24, the
memory 25, the audio processing unit 26, and the connector units 27 and 28. And.
[0026]
The HDMI receiving unit 21 receives the HDMI data transmitted from the DVD player 10,
generates 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.
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[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). Further, the audio processing unit 26 supplies audio data of a certain channel
to the HDMI transmission unit 22. In the case of this example, audio data of a certain channel is
surround back left audio data SBL and surround back right audio data SBR.
[0028]
FIG. 4 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 41, a DAC (digital-analog converter) 42, a
volume adjustment unit 43, an amplification processing unit 44, and a conversion unit 45.
[0029]
The DSP 41 decodes multi-channel audio data supplied from the HDMI receiving unit 21 and
generates audio data of each channel decoded. Among the audio data decoded by the DSP 41, the
left audio data L, right audio data R, central audio data C, low-pass audio data SW, surround left
audio data SL, and surround right audio data SR are supplied to the DAC 42. On the other hand,
the surround back left audio data SBL and the surround back right audio data SBR are supplied to
the conversion unit 45.
[0030]
The DAC 42 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 adjuster 43.
[0031]
The volume adjustment unit 43 adjusts the volume value of the analog audio signal of each
channel and supplies the volume value to the amplification processing unit 44.
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The volume adjustment unit 43 is provided with a volume adjustment circuit such as a variable
resistor for each channel. The amplification processing unit 44 amplifies the audio signal of each
channel supplied from the volume adjustment unit 43, and outputs the amplified audio signal to
the speaker of each channel through the speaker output terminal of each channel. The
amplification processing unit 44 is provided with an amplification circuit for each channel.
[0032]
The conversion unit 45 is supplied with the surround back left audio data SBL and the surround
back right audio data SBR from the DSP 41. Also, the conversion unit 45 is supplied with the bit
clock BCLK, the master clock MCLK and the LR clock LRCLK from the DSP 41. The conversion
unit 45 converts the surround back left audio data SBL and the surround back right audio data
SBR into SPDIF (2-channel PCM) audio data based on each clock, and supplies the audio data to
the HDMI transmission unit 22.
[0033]
Returning to FIG. 3, the HDMI transmission unit 22 receives the video data supplied from the
HDMI reception unit 21 and the surround back left audio data SBL and the surround back right
audio data SBR supplied from the conversion unit 45 of the audio processing unit 26. , Convert to
HDMI data. The HDMI transmitting unit 22 transmits the converted HDMI data to the HDMI
receiving unit 31 of the projector 30.
[0034]
The HDMI transmitting unit 22 is connected to the HDMI receiving unit 31 of the projector 30
via the TMDS line, the DDC line, and the hot plug line.
[0035]
The system 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 stored in the built-in or connected memory 25. For example, a
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microcomputer, a CPU, or the like.
The system 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.
[0036]
The system control unit 23 is connected to the system control unit 14 of the DVD player 10 via
the CEC line, and transmits / receives commands and data to / from the system control unit 14.
The system control unit 23 is also connected to the system control unit 33 of the projector 30 via
the CEC line, and transmits and receives commands and data to and from the system control unit
33.
[0037]
The memory 25 stores a speaker setting table shown in FIG. In the speaker setting table, the
distance SL Distance from the viewing position to the left speaker SL (and the right speaker SR),
the distance SC Distance from the viewing position to the central speaker SC, and the viewing
position to the low frequency speaker SW A distance SSW Distance, a distance SSL Distance from
a viewing position to a surround left speaker SSL (and a surround right speaker SSR), and a
distance SSBL Distance from a viewing position to a surround back left speaker SSBL (and a
surround back right speaker SSBR); The height SSBL Height of the surround back left speaker
SSBL (and the surround back right speaker SSBR) and information SSBL HDMI OUT indicating
whether to output HMDI data to the projector 30 can be set.
[0038]
The height SSBL Height of the surround back left speaker SSBL means the height from the
viewing position of the surround back left speaker SSBL (specifically, the position of the user's
ear). That is, as shown in FIG. 6, the height SSBL Height of the surround back left speaker SSBL is
the viewing position (user's position (user) from the height from the floor surface of the surround
back left speaker SSBL (here, equivalent to the projector left speaker SLP). The position of the ear
of the) is the value obtained by subtracting the height from the floor surface. The height of the
projector left speaker SLP from the floor surface may be determined by the center position of the
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projector left speaker SLP (the position of the dashed arrow A).
[0039]
Moreover, information SSBL HDMI OUT as to whether or not to output HDMI data to the
projector 30 can be set to YES or NO , and in the case of YES , surround back left
audio data SBL and surround back The HDMI data including the right audio data SBR can be
transmitted to the projector 30, and the HDMI data can not be transmitted to the projector 30 in
the case of NO .
[0040]
The system control unit 23 sets the distance SSBL Distance from the viewing position to the
surround back left speaker SSBL (and the surround back right speaker SSBR) set in the speaker
setting table, the surround back left speaker SSBL (and the surround back right speaker SSBR
The rotation angle θ of the projector left speaker SLP and the projector right speaker SRP is
calculated based on the height SSBL Height).
Specifically, as shown in FIG. 6, the rotation angle θ is calculated by sinθ = height SSBL Height
of surround back left speaker SSBL / distance SSBL Distance from viewing position to surround
back left speaker SSBL. In this example, the distance from the viewing position to the surround
back left speaker SSBL is equal to the distance from the viewing position to the surround back
right speaker SSBR, and the height of the surround back left speaker SSBL and the surround back
right speaker SSBR The explanation is based on the assumption that the heights are equal.
However, if they are different, it is possible to individually set each in the speaker setting table of
FIG. 5 and separately calculate the rotation angle of the projector left speaker SLP and the
rotation angle of the projector right speaker SRP. .
[0041]
The system control unit 23 transmits information on the calculated angle to the system control
unit 33 of the projector 30 via the CEC line, and controls rotation of the projector left speaker
SLP and the projector right speaker SRP.
[0042]
Configuration of Projector 30 The projector 30 includes an HDMI receiving unit 31, a projection
unit 32, a system control unit 33, a memory 34, an operation unit 35, a video processing unit 36,
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an audio processing unit 39, and a speaker 40. (Corresponding to the projector left speaker SLP
and the projector right speaker SRP in FIG. 1), a speaker rotation control unit 37, and a
connector unit 38.
[0043]
The HDMI reception unit 31 receives the HDMI data transmitted from the HDMI transmission
unit 22 of the AV amplifier 20, generates the original video data from the HDMI data, and
supplies the video data to the projection unit 32 via the video processing unit 36.
Also, the HDMI receiving unit 31 generates original audio data from the HDMI data, and supplies
the generated audio data to the audio processing unit 39.
The audio data is SPDIF (PCM) data including the surround back left audio data SBL and the
surround back right audio data SBR as described above.
[0044]
The audio processing unit 39 executes audio data supplied from the HDMI receiving unit 31 such
as D / A conversion processing, volume adjustment processing, amplification processing, and the
like, and supplies the processed data to the speaker 40. FIG. 7 is a block diagram showing the
configuration of the audio processing unit 39. As shown in FIG. The audio processing unit 39
includes a DAC (digital-analog converter) 51, a volume adjustment unit 52, and an amplification
processing unit 53.
[0045]
The DAC 51 performs digital-to-analog conversion on audio data supplied from the HDMI
reception unit 31 and supplies an analog audio signal to the volume adjustment unit 52. The
volume adjustment unit 52 adjusts the volume value of the analog audio signal from the DAC 51,
and supplies the volume value to the amplification processing unit 53. The volume value of the
volume adjustment unit 52 is adjusted by the system control unit 33 to the volume value
included in the volume setting command from the system control unit 14 of the AV amplifier 20.
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The amplification processing unit 53 amplifies the audio signal from the volume adjustment unit
52 and outputs it to a speaker. That is, the surround back left audio data SBL is reproduced from
the projector left speaker SLP, and the surround back right audio data SBR is reproduced from
the projector right speaker SRP.
[0046]
Returning to FIG. 3, the projection unit 32 is supplied with video data from the HDMI reception
unit 31, and projects a video on a screen (not shown) based on the video data. The screen is
attached to a wall surface in front of the viewer.
[0047]
The speaker rotation control unit 37 rotates the projector left speaker SLP and the projector
right speaker SRP in response to an instruction from the system control unit 33. For example, the
speaker rotation control unit 37 is realized by a known technique such as a motor for rotation
control. It is done.
[0048]
The system control unit 33 controls the HDMI reception unit 31, the projection unit 32, the
memory 34, the speaker rotation control unit 37, the audio processing unit 39, and the like
based on the operation program of the projector stored in the built-in or connected memory. For
example, a microcomputer, a CPU, or the like.
The system control unit 33 executes various processes based on the operation input from the
operation unit 35 or the control signal and data from each unit.
[0049]
When the system control unit 33 receives the angle information θ from the system control unit
23 of the AV amplifier 20 via the CEC line, the system control unit 33 rotates the projector left
speaker SLP and the projector right speaker SRP by the angle θ. The motion control unit 37 is
controlled.
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[0050]
[Operation of Audio Reproduction System] First, referring to the flowcharts of FIGS. 8 and 9,
processing for reproducing surround left audio data SBL from the projector left speaker SLP and
reproducing surround right audio data SBR from the projector right speaker SRP is described.
explain.
As shown in FIG. 8, the system control unit 23 of the AV amplifier 20 monitors whether HDMI
data is input from the DVD player 10, that is, whether the HDMI reception unit 21 receives HDMI
data. (S11). When the HDMI data is input (YES in S11), the system control unit 23 determines
whether the projector 30 is connected to the AV amplifier 20 (S12). For example, when the
projector 30 is connected via the HDMI cable, since the hot plug output from the projector 30 is
at the high level, the connection can be determined by determining the level of the hot plug.
Here, since the projector 30 is connected (YES in S12), the process proceeds to S13. The
connection confirmation includes the meaning of the confirmation as to whether the power of
the projector 30 is in the on state.
[0051]
Next, the system control unit 23 determines whether the projector 30 has an audio reproduction
function, that is, whether the projector 30 has an audio processing unit 39, a projector left
speaker SLP, and a projector right speaker SRP. (S13). For example, when the projector 30 is
connected via the HDMI cable, the EDID including the device information can be acquired from
the projector 30, so that the audio reproduction function can be performed by analyzing the
device information included in the acquired EDID. It can be determined whether or not it has.
Here, since the voice reproduction function is provided (YES in S13), the process proceeds to
S14.
[0052]
Next, since the system control unit 23 prepares to reproduce the surround back left audio data
SBL and the surround back right audio data SBR with the speakers of the projector 30, the
system control unit 33 of the projector 30 performs volume control via the CEC line. The setting
command is transmitted (S14). The volume setting command includes a volume value (not a
relative value but an absolute value, for example, in dB units) set in the current volume
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adjustment unit 43 of the AV amplifier 20.
[0053]
As shown in FIG. 9, the system control unit 33 of the projector 30 monitors whether a volume
setting command has been received from the system control unit 23 of the AV amplifier 20 via
the CEC line (S31). When the volume setting command is received (YES in S31), the system
control unit 33 reads the volume value included in the volume setting command, and sets the
volume value of the volume adjustment unit 52 as the volume value (S32). Subsequently, the
system control unit 33 transmits a volume setting completion notification to the system control
unit 23 of the AV amplifier 20 via the CEC line (S33). Thereafter, the projector 30 stands by until
receiving HDMI data from the AV amplifier 20.
[0054]
Referring back to FIG. 8, the system control unit 23 of the AV amplifier 20 monitors whether the
volume setting completion notification has been received from the system control unit 33 of the
projector 30 via the CEC line (S15). When the volume setting completion notification is received
(YES in S15), the system control unit 23 controls the audio processing unit 26 and the HDMI
transmission unit 22 to execute multi-channel audio data decoding and transmission of the HDMI
data to the projector 30. To do (S16).
[0055]
Specifically, the audio processing unit 26 (DSP 41) decodes audio data of each channel. The DSP
41 supplies the decoded surround back left audio data SBL and the surround back right audio
data SBR to the converter 45. The conversion unit 45 converts the surround back left audio data
SBL and the surround back right audio data SBR into SPDIF (PCM) data, and supplies the SPDIF
(PCM) data to the HDMI transmission unit 22. The HDMI transmitting unit 22 generates HDMI
data from the video data, the surround back left audio data SBL and the surround back right
audio data SBR, and transmits the HDMI data to the HDMI receiving unit 31 of the projector 30.
[0056]
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As shown in FIG. 9, when receiving HDMI data, the HDMI receiving unit 31 of the projector 30
generates the original video data and the surround back left audio data SBL and the surround
back right audio data SBR, and projects the video data. The audio data is supplied to the section
32, and the surround back left audio data SBL and the surround back right audio data SBR are
supplied to the audio processing section 39 (S34). The system control unit 33 controls the
volume adjustment unit 52 and the amplification processing unit 53 to release the mute state
(S35). In the audio processing unit 39, the DAC 51 performs digital-to-analog conversion of audio
data, the volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the
amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker.
As a result, the surround back left audio data SBL is reproduced from the projector left speaker
SLP, and the surround back right audio data SBR is reproduced from the projector right speaker
SRP (S36).
[0057]
Referring back to FIG. 8, the DSP 41 supplies the decoded left audio data L, right audio data R,
central audio data C, low-pass audio data SW, surround left audio data SL, and surround right
audio data SR to the DAC 42. The DAC 42 performs digital-analog conversion on audio data, the
volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the
amplification processing unit 53 amplifies the analog audio signal and outputs it to a speaker. As
a result, the left audio data L is reproduced from the left speaker SL, the right audio data R is
reproduced from the right speaker SR, the central audio data C is reproduced from the central
speaker SC, and the low frequency audio data SW from the low frequency speaker SSW. The
surround left audio data SL is reproduced from the surround left speaker SSL, and the surround
right audio data SR is reproduced from the surround right speaker SSR (S17).
[0058]
As described above, the surround back left speaker and the surround back right speaker are
separately disposed by reproducing the surround back left audio data SBL and the surround back
right audio data SBR using the speakers provided in the projector 30. There is no need. When
multichannel audio data includes only 1 channel backward audio data instead of surround
backward left audio data SBL and surround backward right audio data SBR, a speaker provided
with projector 30 for the backward audio data is used. You can use and play. In this case, the
projector 30 may be provided with at least one speaker.
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[0059]
If it is determined in S12 that the projector 30 is not connected to the AV amplifier 20 (NO in
S12), or if it is determined in S13 that the projector 30 does not have an audio reproduction
function (S13) And the process proceeds to S18, where the normal reproduction process is
performed. In this case, the DSP 41 supplies the surround back left audio data SBL and the
surround back right audio data SBR to the DAC 42 instead of the converter 45. The DAC 42
performs digital-analog conversion on the surround back left audio data SBL and the surround
back right audio data SBR, the volume adjustment unit 52 adjusts the volume value of the analog
audio signal, and the amplification processing unit 53 amplifies the analog audio signal. Output
to the speaker. As a result, if the surround back left speaker and the surround back right speaker
are connected to the AV amplifier 20, the surround back left audio data SBL is reproduced from
the surround back left speaker and the surround back right audio data from the surround back
right speaker It is also possible to regenerate the SBR. When the surround back left speaker and
the surround back right speaker are not arranged, the surround back left audio data SBL and the
surround back right audio data SBR are added to the audio signals of the other channels, and It is
also possible to play from speakers.
[0060]
Next, with reference to FIGS. 10 and 11, processing for rotating the projector left speaker SLP
and the projector right speaker SRP based on the setting contents of the speaker setting table
will be described. As shown in FIG. 10, the system control unit 23 of the AV amplifier 20
determines whether the distance SSBL Distance from the viewing position to the surround back
left speaker SSBL (surround back right speaker SSBR) is set in the speaker setting table. It judges
(S61). If it is not set (NO in S61), the process ends. Here, as shown in FIG. 5, SSBL Distance is set
to 4.0 m (YES in S61). Next, the system control unit 23 refers to the speaker setting table, and
determines whether information on whether to output HDMI data to the projector 30 is set to
YES (S62). If "NO" is set (NO in S62), the process ends. Here, it is set to "YES" (YES in S62).
Subsequently, the system control unit 23 determines in advance whether the setting is made by
user operation so as to communicate with the system control unit 33 of the projector 30 via the
CEC line (S63). If it is set not to communicate via the CEC line (NO in S63), the process ends.
Here, communication is set via the CEC line (YES in S63).
[0061]
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The system control unit 23 refers to the speaker setting table, and based on the distance SSBL
Distance from the viewing position to the surround back left speaker SSBL and the height SSBL
Height of the surround back left speaker SSBL, the projector left speaker SLP and the projector
right The rotation angle θ of the speaker SRP is calculated. Specifically, as shown in FIG. 6, the
rotation angle θ is calculated by sinθ = high SSBL Height of surround back left speaker SSBL /
distance SSBL Distance from viewing position to surround back left speaker SSBL. In the case of
FIGS. 5 and 6, sin θ = 1/4.
[0062]
Subsequently, the system control unit 23 transmits information of the calculated rotation angle
θ to the system control unit 33 of the projector 30 via the CEC line (S65). Thereafter, the
process waits until a notification is received from the system control unit 33 of the projector 30.
[0063]
As shown in FIG. 11, the system control unit 33 of the projector 30 monitors the reception of the
information θ of the rotation angle from the system control unit 23 of the AV amplifier 20 via
the CEC line (S71). If received (YES in S71), the system control unit 33 determines whether the
received rotation angle θ is within the range of the maximum rotation angle of the projector left
speaker SLP and the projector right speaker SRP ((S71). S72). The maximum rotatable angle is
preset in the memory 34.
[0064]
If the received rotation angle θ is within the maximum rotation angle of the projector left
speaker SLP and the projector right speaker SRP (YES in S72), the system control unit 33 causes
the speaker rotation control unit 37 to rotate. It is instructed to rotate the projector left speaker
SLP and the projector right speaker SRP by the movement angle θ. Incidentally, referring to FIG.
6, the directions of the projector left speaker SLP and the projector right speaker SRP (the sound
wave emitting direction, the direction of the diaphragm) are initially forward and parallel to the
floor surface (broken line arrow A). It shall be facing. In response to the instruction from the
system control unit 33, the speaker rotation control unit 37 rotates the projector left speaker SLP
and the projector right speaker SRP by the angle θ in the counterclockwise direction (downward
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direction) in FIG. 6 (S73). As a result, the direction of the projector left speaker SLP and the
projector right speaker SRP is a dashed arrow B in FIG. 6, and is directed to the viewing position
(user's ear).
[0065]
Subsequently, the system control unit 33 transmits a normal notification to the effect that the
projector left speaker SLP and the projector right speaker SRP can be normally rotated to the
system control unit 23 of the AV amplifier 20 via the CEC line. (S74).
[0066]
On the other hand, if the received rotation angle θ is not within the maximum rotation angle of
the projector left speaker SLP and the projector right speaker SRP in S72 (NO in S72), the system
control unit 33 instructs the speaker rotation control unit 37. On the other hand, no instruction
is given to rotate the projector left speaker SLP and the projector right speaker SRP by the
rotation angle θ.
As a result, the directions of the projector left speaker SLP and the projector right speaker SRP
remain unchanged as the dashed arrow A. After that, the system control unit 33 transmits an
abnormality notification that the projector left speaker SLP and the projector right speaker SRP
can not be rotated normally to the system control unit 23 of the AV amplifier 20 via the CEC line.
(S75).
[0067]
Returning to FIG. 10, when the system control unit 23 of the AV amplifier 20 receives a
notification from the system control unit 33 of the projector 30 via the CEC line (YES in S66),
whether the notification content is a normal notification or not (S67). If the notification is normal
(YES in S67), the process ends. On the other hand, if it is an abnormality notification (NO in S67),
the orientation of the projector left speaker SLP and the projector right speaker SRP could not be
directed to the viewing position, and that effect is displayed on the operation display unit 24 to
notify the user. . Furthermore, in order to turn the direction of the projector left speaker SLP and
the projector right speaker SRP toward the viewing position, the distance SSBL Distance from the
viewing position to the surround back left speaker SSBL in the speaker setting table and the
surround back left It is displayed on the operation display unit 24 that at least one of the height
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SSBL Height of the speaker SSBL needs to be changed, and the user is notified (S68).
[0068]
As described above, according to the present embodiment, by inputting the setting contents of
the speaker setting table, it is possible to turn the direction of the projector left speaker SLP and
the projector right speaker SRP to the viewing position.
[0069]
Another Embodiment Next, another preferred embodiment of the present invention will be
described.
In this example, one of the arrangement shown in FIG. 1 and the arrangement of the projector 30
and each speaker as shown in FIG. 12 can be selectively adopted. In FIG. 12, the projector 30 is
disposed in front of the viewing position (user), and the center speaker SC is not connected to the
AV amplifier 20B, but the surround back left speaker SSBL and the surround back right speaker
SSBR Is connected. In the present embodiment, when the projector 30 is disposed behind the
viewing position as shown in FIG. 1 according to the positional relationship between the
projector 30 and the viewing position, the projector 30 is provided in the above-described
embodiment. The surround back left audio data SBL and the surround back right audio data SBR
are reproduced using a speaker. On the other hand, when the projector 30 is disposed in front of
the viewing position as shown in FIG. 12, the central audio data C is reproduced using the
speaker provided in the projector 30.
[0070]
The memory 25 stores a projector arrangement table shown in FIG. In addition, it is possible to
input information as to whether the projector 30 is disposed in front of the viewing position or in
which the projector 30 is disposed behind the viewing position by the user operation via the
operation display unit 24. When the information indicating that the projector 30 is to be
arranged in front of the user is input by the user operation, the system control unit 23 sets
forward of the user in the projector arrangement table and arranges the projector 30 behind
the user. When the information to the effect is input, the system control unit 23 sets rear of
the user in the projector arrangement table.
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[0071]
FIG. 14 is a block diagram showing the configuration of the audio processing unit 26B of this
example. The voice processing unit 26B is different from the voice processing unit 26 of FIG. 4 in
that the switching unit 46 is provided inside the DSP 41. The switching unit 46 may be provided
in the rear stage of the DSP 41 (between the DSP 41 and the DAC 42 and between the DSP 41
and the converting unit 45).
[0072]
The DSP 41 decodes multi-channel audio data supplied from the HDMI receiving unit 21 and
generates audio data of each channel decoded. Among the audio data decoded by the DSP 41, the
left audio data L, right audio data R, low-pass audio data SW, surround left audio data SL, and
surround right audio data SR are supplied to the DAC 42 as they are. On the other hand, the
central audio data C, the surround back left audio data SBL, and the surround back right audio
data SBR are supplied to the switching unit 46.
[0073]
The switching unit 46 supplies the center audio data C, the surround back left audio data SBL,
and the surround back right audio data SBR to the DAC 42 (that is, reproduces from a speaker
connected to the AV amplifier 20) or a conversion unit It is selected whether to supply 45 (that
is, to play from the speaker of the projector 30). Specifically, the switching unit 42 supplies the
switch SW1 for switching whether the central audio data C is supplied to the DAC 42 or the
switch SW4 (and the switch SW5) and the surround back left audio data SBL to either the DAC
42 or the switch SW4. To the conversion unit 45, and the switch SW3 to switch the surround
back right audio data SBR to either the DAC 42 or the switch SW5, and the central audio data C
or the surround back left audio data SBL to the conversion unit 45 And a switch SW5 for
switching which of the central audio data C and the surround back right audio data SBR is to be
supplied to the converter 45.
[0074]
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The conversion unit 45 is supplied with the surround back left audio data SBL and the surround
back right audio data SBR or the center audio data C from the switching unit 46. The conversion
unit 45 converts the surround back left audio data SBL and the surround back right audio data
SBR, or the central audio data C into SPDIF audio data based on each clock (not shown), and
outputs it to the HDMI transmission unit 22. Supply.
[0075]
If the projector 30 is rear of the user with reference to the projector arrangement table, the
system control unit 23 sets the rotation angle θ of the projector left speaker SLP and the
projector right speaker SRP, as in the above embodiment. sin θ = high SSBL Height of surround
rear left speaker SSBL / a distance from the viewing position to the surround rear left speaker
SSBL, calculated by SSBL Distance.
[0076]
On the other hand, as shown in FIG. 15, when the projector 30 is in front of the user , the
system control unit 23 sets the rotation angle θ of the projector left speaker SLP and the
projector right speaker SRP to 180−θ ′ (however, sin θ). '= High SSBL Height of surround
back left speaker SSBL / distance SSBL Distance from viewing position to surround back left
speaker SSBL).
Therefore, when the projector left speaker SLP and the projector right speaker SRP initially face
the front opposite to the viewing position (broken line arrow A), the direction of the viewing
position that is the rear side by rotating (broken line It will turn to arrow B).
[0077]
FIG. 16 is a flowchart showing the process in this example of S16 of FIG. As shown in FIG. 16, the
system control unit 23 refers to the projector arrangement table, and determines whether the
projector 30 is arranged behind the user (S21).
[0078]
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If the projector 30 is disposed behind the user (YES in S21), the system control unit 23 outputs
the central audio data C to the DAC 42, and the surround back left audio data SBL and the
surround back right audio data SBR The switching unit 46 is controlled to output to the
converting unit 45. That is, the switch SW1 selects the terminal a, and the switches SW2 to SW5
select the terminal b. Therefore, the surround back left audio data SBL and the surround back
right audio data SBR are converted into HDMI data and transmitted to the projector 30. Thereby,
in FIG. 1, the central audio data C is reproduced from the central speaker SC, the surround back
left audio data SBL is reproduced from the projector left speaker SLP, and the surround back
right audio data SBR is reproduced from the projector right speaker SRP S22).
[0079]
When the projector 30 is disposed in front of the user (NO in S21), the system control unit 23
outputs the surround back left audio data SBL and the surround back right audio data SBR to the
DAC 42, and the central audio data C. The switching unit 46 is controlled to output to the
converting unit 45. That is, the switch SW1 selects the terminal b, and the switches SW2 to SW5
select the terminal a. Accordingly, the central audio data C is converted into HDMI data and
transmitted to the projector 30. Thereby, in FIG. 12, the surround back left audio data SBL is
reproduced from the surround back left speaker SSBL, the surround back right audio data SBR is
reproduced from the surround back right speaker SSBR, and the center from the projector left
speaker SLP and the projector right speaker SRP. The audio data C is reproduced (S23).
[0080]
As described above, according to the present embodiment, since the audio data reproduced from
the speaker of the projector 30 can be appropriately changed by the arrangement of the
projector 30, optimal audio data can be reproduced. Further, by the arrangement of the projector
30, the turning angle can be appropriately set so that the direction of the projector left speaker
SLP and the projector right speaker SRP is directed to the user.
[0081]
Although the preferred embodiments of the present invention have been described above, the
present invention is not limited to these embodiments. The projector may have three or more
speakers, and the rear audio data may have three or more channels. The sink device is not
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limited to the projector, and may be a display device such as a television receiver. The program
may also be provided in the form of a program for causing a computer to execute the abovedescribed operation of the AV amplifier or the projector, and a recording medium recording the
program. 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.
[0082]
The present invention can be suitably adopted for an AV amplifier, a projector and the like.
[0083]
It is a figure which shows arrangement ¦ positioning of AV amplifier 20, the projector 30, and a
speaker.
FIG. 3 is an external view showing a projector 30. FIG. 2 is a block diagram showing
configurations of a DVD player 10, an AV amplifier 20, and a projector 30. FIG. 2 is a block
diagram for explaining an audio processing unit 26. It is a figure which shows a speaker setting
table. It is a conceptual diagram explaining the relationship between a viewing position, the
setting content of a speaker setting table, and rotation angle (theta). FIG. 6 is a block diagram for
explaining an audio processing unit 39. 5 is a flowchart illustrating the operation of the AV
amplifier 20. 5 is a flowchart illustrating an operation of the projector 30. 5 is a flowchart
illustrating the operation of the AV amplifier 20. 5 is a flowchart illustrating an operation of the
projector 30. It is a figure which shows arrangement ¦ positioning of AV amplifier 20, the
projector 30, and a speaker. It is a figure which shows a projector arrangement ¦ positioning
table. It is a block diagram explaining sound processing unit 26B. It is a conceptual diagram
explaining the relationship between a viewing position, the setting content of a speaker setting
table, and rotation angle (theta). 5 is a flowchart illustrating the operation of the AV amplifier 20.
It is a figure explaining the audio ¦ speech data of each channel.
Explanation of sign
[0084]
DESCRIPTION OF SYMBOLS 10 DVD player 20 AV amplifier 21 HDMI receiving part 22 HDMI
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transmitting part 23 System control part 25 Memory 26 Audio processing part 30 Projector 31
HDMI receiving part 33 System control part 37 Speaker rotation control part
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