close

Вход

Забыли?

вход по аккаунту

?

JP2008227942

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2008227942
PROBLEM TO BE SOLVED: To reproduce high quality voice. An output speaker selecting unit
calculates a listening position and a listening attitude based on a position detection signal POD
sent from a seating sensor and content type information CTI sent from a drive processing unit.
Further, an audio output speaker is selected such that a sound image close to a sound image can
be formed from a plurality of speakers disposed in the vehicle by an ideal speaker arrangement.
The listening position, the listening attitude, and the audio output speaker are sent to the audio
control unit 225 as the determination information SPD. Then, the audio control unit 225 controls
the channel processing unit 221 and the volume adjustment unit 223 based on the
determination information SPD. Thus, the audio signal adjusted under the control of the audio
control unit 225 is output from the audio output speaker toward the sound field space. [Selected
figure] Figure 6
Content reproduction apparatus and content reproduction method
[0001]
The present invention relates to a content reproduction apparatus and a content reproduction
method.
[0002]
With the recent technological development of recording media such as DVD (Digital Versatile
Disk), a multi-channel surround type content reproduction apparatus having a plurality of
speakers has become widespread.
09-05-2019
1
By using such a content reproduction apparatus, it is possible to reproduce realistic surround
sound similar to that in a movie theater even in a home space or a vehicle interior space.
[0003]
As described above, in the case of enjoying surround sound also in the home space or the vehicle
interior space, the arrangement position of the plurality of speakers is also restricted due to
space restrictions. For example, in order to set the sound field in the vehicle interior space in the
5.1 channel surround system, the speaker arrangement shown in FIG. 1 is generally employed.
That is, viewed from the center of the space in the vehicle, the center speaker is disposed in the
forward direction, and the subwoofer speaker is disposed in the rearward direction. Further,
when viewed from the center of the space in the vehicle, the left speaker is disposed in the
diagonal left front direction, and the light speaker is disposed in the diagonal right front
direction. Furthermore, as viewed from the center of the space in the vehicle, the surround left
speakers are disposed in the diagonal left rear direction, and the surround light speakers are
disposed in the diagonal right rear direction.
[0004]
However, the listener's listening posture in the vehicle interior space varies, and it is difficult to
reproduce realistic surround sound if it is possible to output only a fixed audio channel from a
fixed speaker. For this reason, for example, there is a technique for switching the channel sound
output from each speaker when a display screen for displaying a video is disposed rearward and
a listener faces backward to view the display screen (patented) Reference 1: Hereinafter, referred
to as “conventional example”).
[0005]
JP 2004-297447 A
[0006]
By the way, when adopting a multi-channel surround system, the recommended speaker
09-05-2019
2
arrangement is the BS. It is defined by the 775-1 standard (hereinafter simply referred to as "ITU
standard").
According to this standard, for example, in the 5.1 channel surround system, as shown in FIG. 2,
the center speaker is disposed in the forward direction of the listener, and the left speaker and
the right speaker It is recommended that they be placed in symmetrical directions. Furthermore,
it is recommended that the surround left speakers and the surround light speakers be arranged
in symmetrical directions diagonally to the left and the rear. The placement position of the
subwoofer speakers is not clearly defined in the ITU standard.
[0007]
However, for example, in the in-vehicle space, a driver's seat and a passenger seat are typical as
listening positions which are the seating positions of the listeners, and they are deviated from the
center position of the in-vehicle space in the longitudinal and lateral directions. Often For this
reason, in the above-described generally adopted speaker arrangement, a listener often can not
set a sound field based on the speaker arrangement recommended by the ITU standard. Such a
situation can not be eliminated even by switching the channel sound outputted from each
speaker as in the above-mentioned prior art.
[0008]
For this reason, when the multi-channel surround system is adopted, there is a strong demand for
a technology that enables setting of a sound field close to the ITU standard even in the vehicle
interior space. Responding to such a request is one of the problems to be solved by the present
invention.
[0009]
The present invention has been made in view of the above-described circumstances, and an
object thereof is to provide a content reproduction apparatus and a content reproduction method
capable of providing high-quality sound to a listener.
[0010]
The invention according to claim 1 is a content reproduction apparatus that reproduces audio
09-05-2019
3
content including a plurality of types of channel audio, and outputs audio from a plurality of
speakers disposed in a sound field space, and listening in the sound field space Selection means
for selecting at least two audio output speakers that perform audio output from the plurality of
speakers based on the estimated position and estimated attitude that are estimation results of the
position and listening attitude; and from each of the audio output speakers And means for
adjusting the audio output timing and the output volume of the content reproduction device.
[0011]
The invention according to claim 9 is a content reproduction method for reproducing audio
content including a plurality of types of channel audio, and outputting audio from a plurality of
speakers disposed in a sound space, the listening in the sound space A selection step of selecting
at least two audio output speakers that perform audio output from the plurality of speakers
based on the estimated position and estimated attitude that are estimation results of the position
and listening attitude; from each of the audio output speakers An adjusting step of adjusting the
audio output timing and the output sound volume of the above.
[0012]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In the following description and the drawings, the same or equivalent elements will be denoted
by the same reference symbols, without redundant description.
[0013]
[Configuration] FIG. 3 is a block diagram showing a schematic configuration of the content
reproduction apparatus 100 according to the present embodiment.
In the following description, the content reproduction device 100 is assumed to be a device
mounted on a vehicle CR (see FIG. 4).
[0014]
09-05-2019
4
As shown in FIG. 3, the content reproduction apparatus 100 includes a control unit 110, a drive
unit 120, and speakers 130C to 130SW.
The content reproduction apparatus 100 further includes a display unit 140 as a display unit, an
operation input unit 150 as an operation input unit, and a seating sensor 160 as a detection unit.
[0015]
The elements 120 to 160 other than the control unit 110 described above are connected to the
control unit 110.
[0016]
The control unit 110 centrally controls the entire content reproduction apparatus 100.
The details of the control unit 110 will be described later.
[0017]
When the drive unit 120 receives a data read command from the drive processing unit 210 of
the control unit 110, which will be described later, the data, etc. of the content recorded in the
content media CMD such as a loaded DVD or CD (Compact Disk). The read data is sent to the
drive processing unit 210 as a read data signal RDD. The types of content recorded in the
content media CMD include audio content, video content, and composite content in which audio
content and video content are combined.
[0018]
Note that audio content is recorded in the content media CMD in a 5.1 channel surround system,
which is one of multi-channel surround systems. In the 5.1 channel surround system, as a sound
channel, a center channel (hereinafter also referred to as “C channel”), a left channel
09-05-2019
5
(hereinafter also referred to as “L channel”), and a right channel (hereinafter referred to as “R
channel”) ), Surround left channel (hereinafter also referred to as “SL channel”), surround
light channel (hereinafter also referred to as “SR channel”), low-pass sound effect channel
(hereinafter also referred to as “LFE (low frequency effect channel)”) Is prepared.
[0019]
Also, video content is encoded in the MPEG format and recorded in the content media CMD.
[0020]
In the present embodiment, the speakers 130C to 130SW are composed of 12 speakers in total:
130C, 130L1, 130L2, 130L3, 130SL1, 130SL2, 130R1, 130R2, 130R3, 130SR1, 130SR2,
130SW.
[0021]
Here, the speaker 130C is a center speaker for outputting the sound of the C channel.
The speaker 130L1 is a left speaker for outputting L channel audio, and the speaker 130L2 is an
auxiliary left speaker for outputting L channel audio.
The speaker 130L3 is an auxiliary left speaker for outputting L channel audio in principle, but
may be also used for outputting SL channel audio as described later. The speaker 130SL1 is a
surround left speaker for outputting the sound of the SL channel, and the speaker 130SL2 is an
auxiliary surround left speaker for outputting the sound of the SL channel.
[0022]
The speaker 130R1 is a light speaker for outputting R channel audio, and the speaker 130R2 is
an auxiliary light speaker for outputting R channel audio. The speaker 130R3 is an auxiliary light
speaker for outputting the sound of the R channel in principle, but may be also used for
outputting the sound of the SR channel as described later. The speaker 130SR1 is a surround
light speaker for outputting sound of the SR channel, and the speaker 130SR2 is an auxiliary
surround light speaker for outputting sound of the SR channel.
09-05-2019
6
[0023]
The speaker 130SW is a subwoofer speaker for outputting the sound of the LFE channel.
[0024]
The speakers 130 </ b> C to 130 </ b> SW reproduce and output guidance voice, music and the
like under the control of the control unit 110.
[0025]
In the present embodiment, as shown in FIG. 4, the center speaker 130 </ b> C is disposed in the
dashboard in the front center of the sound field space ASP, which is the in-vehicle space of the
vehicle CR.
The center speaker 130C is disposed to face the rear.
[0026]
The left speaker 130L1 is disposed in a front door housing on the passenger seat side.
The left speaker 130L1 is disposed to face the front passenger seat. Auxiliary left speaker 130L2
is disposed in a dashboard on the front passenger side. The auxiliary left speaker 130L2 is
disposed to face the front passenger seat. The auxiliary left speaker 130L3 is disposed in the
front door housing on the passenger seat side, and is located slightly behind the left speaker
130L1. The auxiliary left speaker 130L3 is disposed to face the front passenger seat.
[0027]
The surround left speaker 130SL1 is disposed in a casing at the rear on the passenger seat side.
The surround left speaker 130SL1 is disposed to face the rear seat on the passenger seat side.
The auxiliary surround left speaker 130SL2 is disposed on the rear passenger side of the sound
09-05-2019
7
field space ASP. The auxiliary surround left speaker 130SL2 is disposed to face the driver's seat.
[0028]
The light speaker 130R1 is disposed in the front door housing on the driver's seat side. The light
speaker 130R1 is disposed to face the driver's seat. The auxiliary light speaker 130R2 is
disposed in the dashboard on the front driver's side. The auxiliary light speaker 130R2 is
disposed to face the driver's seat. The auxiliary light speaker 130R3 is disposed in the front door
housing on the driver's seat side, and is located slightly behind the light speaker 130R1. The
auxiliary light speaker 130R3 is disposed to face the driver's seat.
[0029]
The surround light speaker 130SR1 is disposed in a rear case on the driver's seat side. The
surround light speaker 130SR1 is disposed to face the rear seat on the driver's seat side. The
auxiliary surround light speaker 130SR2 is disposed on the driver's side in the rear of the sound
field space ASP. The auxiliary surround light speaker 130SR2 is disposed to face the front
passenger seat.
[0030]
The subwoofer speaker 130SW is disposed at the rear of the sound field space ASP. The
subwoofer speaker 130SW is disposed to face forward.
[0031]
As described above, the speaker arrangement in the vehicle CR in the present embodiment is
different from the general speaker arrangement in the vehicle shown in FIG. 1 in the auxiliary left
speakers 130L2 and 130L3, the auxiliary surround left speaker 130SL2 and the auxiliary light
speaker A total of six speakers, 130R2 and 130R3, and an auxiliary surround light speaker
130SR2 are added.
[0032]
09-05-2019
8
Among these, the auxiliary surround left speaker 130SL2 and the auxiliary light speaker 130R2
are disposed to face the driver's seat.
Further, the auxiliary left speaker 130L2 and the auxiliary surround light speaker 130SR2 are
disposed to face the front passenger seat.
[0033]
Returning to FIG. 3, the display unit 140 includes (i) a display device 141 such as a liquid crystal
display panel, an organic EL (Electro Luminescence) panel, or a PDP (Plasma Display Panel), and
(ii) display control sent from the control unit 110. A display controller such as a graphic renderer
that controls the entire display unit 140 based on data, and (iii) a display image memory that
stores display image data, and the like are configured. Here, the display device 141 is disposed
around the center speaker 130C at the front center in the sound field space ASP (see FIG. 4). The
display unit 140 displays content images, operation guidance information, and the like under the
control of the control unit 110.
[0034]
The operation input unit 150 is configured of a key unit provided on the main body of the
content reproduction apparatus 100 or a remote input device or the like including the key unit.
Here, a touch panel provided in the display device of the display unit 140 can be used as the key
part provided in the main body. In addition, it can replace with the structure which has a key
part, and can also employ | adopt the structure which voice-inputs.
[0035]
When the user operates the operation input unit 150, the setting of the operation content of the
content reproduction apparatus 100 is performed. For example, the user uses the operation input
unit 150 to set playback content and search for content. Such input contents are sent from the
operation input unit 150 to the control unit 110.
09-05-2019
9
[0036]
The seating sensor 160 detects the seating position of the passenger in the vehicle CR. A position
detection signal POD, which is a detection result of the seating sensor, is sent to an audio
processing unit 220, which will be described later, of the control unit 110.
[0037]
The control unit 110 generally controls the entire content reproduction apparatus 100 as
described above. As shown in FIG. 5, the control unit 110 includes a drive processing unit 210,
an audio processing unit 220, and a video processing unit 230.
[0038]
The drive processing unit 210 issues a data read command to the drive unit 120 according to the
user's command input IPD reported from the operation input unit 150, and the voice data
included in the read data signal RDD sent from the drive unit 120 The component and the video
data component are separated. The audio data component thus separated is sent as an audio data
signal ADD to the audio processing unit 220, and the separated video data component is sent as
a video data signal IDD to the video processing unit 230.
[0039]
Further, the drive processing unit 210 analyzes the information of the type of the reproduction
target content included in the read data signal RDD, and the type of the content whether the
reproduction target content is only the audio content or the audio content and the video content
Are sent as content type information CTI to an output speaker selecting unit 224 described later
of the audio processing unit 220. When the content recorded in the content media is only video
content, the drive processing unit 210 does not transmit the content type information CTI to the
audio processing unit 220.
[0040]
09-05-2019
10
The audio processing unit 220 performs processing for reproducing and outputting audio from
the speakers 130C to 130SW based on the audio data signal ADD from the drive processing unit
210 and the content type information CTI. The audio processing unit 220 includes an audio
control unit 225 and an output speaker selection unit 224, as shown in FIG. Further, the audio
processing unit 220 includes a channel processing unit 221, an analog conversion unit 222, and
a volume adjustment unit 223 as volume adjustment means.
[0041]
When the audio control unit 225 receives later-described decision information SPD from the
output speaker selection unit 224, the audio control unit 225 controls the channel processing
unit 221 and the volume adjustment unit 223 based on the decision information SPD. For such
control, a channel processing control instruction CPC for the channel processing unit 221 (more
specifically, a channel separation control instruction CSC for the channel separation unit 310
described later of the channel processing unit 221, a distribution control instruction ACC for the
signal distribution unit 320 described later, Also, a delay control instruction DLC (see FIG. 9) for
the signal delay unit 330 described later and a volume adjustment control instruction VLC for the
volume adjustment unit 223 are included.
[0042]
The audio control unit 225 is provided with a storage unit (not shown), and the storage unit
stores information necessary for data processing of audio content in the audio processing unit
220. The information includes the delay time of the sound output from each of the speakers
130C to 130SW and the volume correction value according to the listening position and the
listening attitude of the passenger in the vehicle CR.
[0043]
The output speaker selection unit 224 selects an audio output speaker that performs audio
output from the speakers 130C to 130SW based on the listening position and the listening
attitude of the passenger in the vehicle CR. As shown in FIG. 7, the output speaker selection unit
224 includes a listening posture calculation unit 226 as an estimation calculation unit, a sound
image direction calculation unit 227 as a direction calculation unit, and an audio output speaker
09-05-2019
11
determination unit 228 as a determination unit. And have.
[0044]
The listening posture calculation unit 226 calculates a listening posture based on the position
detection signal POD from the seating sensor 160 and the content type information CTI from the
drive processing unit 210. For example, in the case where the position detection signal POD is
"driver's seat" and the content type information CTI is "composite content", as shown in FIG. Is
calculated as the listening posture. When the position detection signal POD is "driver's seat" and
the content type information CTI is "audio content", the posture in which the passenger turns
from the driver's seat to the D2 direction, which is the front, is calculated as the listening posture.
The position and orientation information PDD, which is the calculation result of the listening
position calculation unit 226, is sent to the sound image direction calculation unit 227.
[0045]
Referring back to FIG. 7, the sound image direction calculation unit 227 calculates a sound image
direction by an ideal speaker arrangement based on the ITU standard in the 5.1 channel
surround system based on the position and orientation information PDD from the listening
posture calculation unit 226. . The sound image direction information ADD that is the calculation
result of the sound image direction calculation unit 227 is sent to the sound output speaker
determination unit 228.
[0046]
Based on the sound image direction information ADD from the sound image direction calculation
unit 227, the sound output speaker determination unit 228 determines a sound output speaker
that performs sound output from the twelve speakers 130C to 130SW mounted on the vehicle
CR. . The determination information SPD which is the determination result by the audio output
speaker determination unit 228 is sent to the audio control unit 225.
[0047]
09-05-2019
12
Returning to FIG. 6, the channel processing unit 221 performs the audio data signal ADD sent
from the drive processing unit 210 according to the channel processing control command CPC
from the audio control unit 225 based on the 5.1 channel surround system. While separating
into individual channel signals, 12 channel data signals PCDC to PCDLFE corresponding to the
number of speakers 130C to 130SW are generated. The channel data signals PCDC to PCDLFE
generated in this manner are output to the analog converter 222. As described above, the
channel processing control command CPC is composed of the channel separation control
command CSC, the distribution control command ACC, and the delay control command DLC.
[0048]
As shown in FIG. 9, the channel processing unit 221 having such a function includes a channel
separation unit 310 as individual channel signal generation means, a signal distribution unit 320,
and a signal delay unit 330 as delay adjustment means. There is.
[0049]
The channel separation unit 310 corresponds to the C to LFE channels in the 5.1 channel
surround system from the audio data signal ADD according to the channel separation control
instruction CSC which is a part of the channel processing control instruction CPC from the audio
control unit 225. The separated channel data signals SCDC, SCDL, SCDSL, SCDR, SCDSR, SCDLFE
are generated.
These separated channel data signals SCDC to SCDLFE are output toward signal distribution unit
320.
[0050]
Signal distribution unit 320 distributes six separated channel data signals SCDC to SCDLFE sent
from channel separation unit 310 according to distribution control instruction ACC which is a
part of channel processing control instruction CPC from audio control unit 225. Twelve
distribution channel data signals ACDC, ACDL1, ACDL2, ACDL3, ACDSL1, ACDSL2, ACDR1,
ACDR2, ACDR3, ACDSR1, ACDSR2, ACDLFE, which are the same as the number of speakers
130C-130SW, including no signal. The distribution channel data signals ACDC to ACDLFE are
output toward the signal delay unit 330.
09-05-2019
13
[0051]
In the present embodiment, the distribution control instruction ACC includes the distribution
control instruction ACCL for the L channel and the SL channel, and the distribution control
instruction ACCR for the R channel and the SR channel (see FIG. 10). The distribution control
command ACCL includes three individual distribution control commands ACCL1 to ACCL3 for the
L channel and three individual distribution control commands ACCSL1 to ACCSL3 for the SL
channel (see FIG. 11). The distribution control command ACCR includes three individual
distribution control commands ACCR1 to ACCR3 for the R channel and three individual
distribution control commands ACCSR1 to ACCSR3 for the SR channel (see FIG. 13).
[0052]
As shown in FIG. 10, the signal distribution unit 320 includes a left side distribution unit 321 and
a right side distribution unit 322. The separation channel data signal SCDC is not processed in
the signal distribution unit 320, and is output as it is to the signal delay unit 330 as the
distribution channel data signal ACDC. Further, the separation channel data signal SCDLFE is not
processed in the signal distribution unit 320 as in the separation channel data signal SCDC, and
is output as it is to the signal delay unit 330 as the distribution channel data signal ACDLFE.
[0053]
The left side distribution unit 321 performs distribution processing on the L channel and the SL
channel. As shown in FIG. 11, the left side distribution unit 321 includes switch elements 323L1,
323L2, 323SL1 and 323SL2 and a composite switch unit 324L. Among them, the switch
elements 323L1 and 323L2 are for generating the distribution channel data signals ACDL1 and
ACDL2 based on the separation channel data signal SCDL. The switch elements 323SL1 and
323SL2 are for generating the distribution channel data signals ACDSL1 and ACDSL2 based on
the separation channel data signal SCDSL.
[0054]
Each switch element has two terminals, one is connected to the channel separation unit 310 and
09-05-2019
14
the other is connected to the signal delay unit 330. The switch elements 323L1, 323L2, 323SL1,
and 323SL2 are turned on / off in accordance with the corresponding individual distribution
control commands ACCL1, ACCL2, ACCSL1, and ACCSL2.
[0055]
The composite switch unit 324L is for generating the distribution channel data signal ACDL3
based on the separation channel data signal SCDL and the separation channel data signal SCDSL.
As shown in FIG. 12, the composite switch unit 324L includes switch elements 323L3 and
323SL3 and a mixer 325L3.
[0056]
The switch elements 323L3 and 323SL3 each have two terminals, one is connected to the
channel separation unit 310, and the other is connected to the signal delay unit 330. The ON /
OFF operation of the switch elements 323L3 and 323SL3 is performed in accordance with the
corresponding individual distribution control commands ACCL3 and ACCSL3. The mixer 325L3
mixes the two signals sent from the switch elements 323L3 and 323SL3 to generate the
distribution channel data signal ACDL3.
[0057]
The light side distribution unit 322 performs distribution processing on the R channel and the SR
channel. As shown in FIG. 13, the light side distribution unit 322 includes switch elements
323R1, 323R2, 323SR1 and 323SR2 and a composite switch unit 324R. Among them, the switch
elements 323R1 and 323R2 are for generating the distribution channel data signals ACDR1 and
ACDR2 based on the separation channel data signal SCDR. The switch elements 323SR1 and
323SR2 are for generating the distribution channel data signals ACDSR1 and ACDSR2 based on
the separation channel data signal SCDSR.
[0058]
The configuration of each switch element is the same as the configuration of each switch element
09-05-2019
15
in the left side distribution unit 321. The ON / OFF operation of the switch elements 323R1,
323R2, 323SR1, and 323SR2 is performed in accordance with the corresponding individual
distribution control commands ACCR1, ACCR2, ACCSR1, and ACCSR2.
[0059]
The composite switch unit 324R is for generating the distribution channel data signal ACDR3
based on the separation channel data signal SCDR and the separation channel data signal SCDSR.
The composite switch unit 324R, as shown in FIG. 14, includes switch elements 323R3 and
323SR3 and a mixer 325R3.
[0060]
The configuration of the switch elements 323R3 and 323SR3 is the same as that of the other
switch elements. The ON / OFF operation of the switch elements 323R3 and 323SR3 is
performed in accordance with the corresponding individual distribution control commands
ACCR3 and ACCSR3. The mixer 325R3 mixes the two signals sent from the switch elements
323R3 and 323SR3 to generate a distribution channel data signal ACDR3.
[0061]
Referring back to FIG. 9, the signal delay unit 330 transmits the distribution channel data signals
ACDC to ACDLFE sent from the signal distribution unit 320 according to the delay control
command DLC which is a part of the channel processing control command CPC from the audio
control unit 225. The channel data signals PCDC to PCDLFE are generated with a delay for each
predetermined time. Thus, the channel data signals PCDC to PCDLFE generated by the signal
delay unit 330 are output to the analog conversion unit 222.
[0062]
As shown in FIG. 15, the signal delay unit 330 includes twelve delay devices 331C to 331LFE
corresponding to the twelve speakers 130C to 130SW. Each of the delay devices 331C to
331LFE delays the distribution channel data signals ACDC to ACDLFE, the distribution of which is
09-05-2019
16
completed by the signal distribution unit 320, according to the individual delay control
commands DLCC to DLCLFE by the audio control unit 225, by time DLC to DLLFE.
[0063]
Returning to FIG. 6, the analog conversion unit 222 converts the channel data signals PCDC to
PCDLFE, which are digital signals from the channel processing unit 221, into analog signals. The
analog conversion unit 222 includes twelve DA (Digital to Analogue) converters configured in the
same manner as each other in correspondence to the twelve digital data signals. The analog
signals PBSC to PBSLFE that are analog conversion results by the analog conversion unit 222 are
output to the volume adjustment unit 223.
[0064]
The volume adjuster 223 adjusts the volume of the analog signals PBSC to PBSLFE sent from the
analog converter 222 in accordance with the volume adjustment control command VLC from the
audio controller 225. The volume adjusting unit 223 includes 12 amplifiers configured in the
same manner as each other according to the number of the speakers 130C to 130SW, and
adjusts the level of the analog signal. The result of this adjustment is output toward the speakers
130C to 130SW as output audio signals AOSC to AOSLFE.
[0065]
Referring back to FIG. 5, the video processing unit 230 decodes the video data signal IDD coded
by the MPEG method or the like to generate an output video data signal DMD. The generated
output video data signal DMD is sent to the display unit 140.
[0066]
[Operation] Next, regarding the operation of the content reproduction apparatus 100 configured
as described above, the method of selecting an audio output speaker by the output speaker
selection unit 224 and the processing operation of audio content data by the audio control unit
225 will be mainly described. Description will be focused on.
09-05-2019
17
[0067]
As a premise, it is assumed that only one person is on board the vehicle CR, and that one person
is seated in the “driver's seat”.
Also, it is assumed that the content to be reproduced is “composite content”.
[0068]
<< Operation in Output Speaker Selection Unit 224 >> In the output speaker selection unit 224,
the listening posture calculation unit 226 receives the position detection signal POD sent from
the seating sensor 160 and the content type information CTI sent from the drive processing unit
210. The listening posture is calculated based on Since the position detection signal POD sent
from the seating sensor 160 is only “driver's seat” and the content type information CTI sent
from the drive processing unit 210 is “composite content”, the listening posture is the
passenger Is determined to be a posture facing the direction D1 of viewing the display device
141 from the driver's seat (see FIG. 16). The listening posture calculated by the listening position
calculation unit 226 and the listening position determined by the position detection signal POD
from the seating sensor 160 are sent to the sound image direction calculating unit 227 as
position and posture information PDD.
[0069]
The sound image direction calculation unit 227 calculates the direction (sound source direction)
of the ideal speaker arrangement based on the ITU standard in the 5.1 channel surround system
from the position and orientation information PDD sent from the listening posture calculation
unit 226. That is, as shown in FIG. 16, the sound image direction calculation unit 227 sets the
ideal sound source direction DL for the L channel and the ideal sound source direction DSL for
the SL channel from the listening position “driver's seat” and the listening posture “D1
direction”. Ideal sound source direction DR for the R channel and ideal sound source direction
DSR for the SR channel are calculated. The sound image direction information ADD that is the
calculation result of the sound image direction calculation unit 227 is sent to the sound output
speaker determination unit 228.
09-05-2019
18
[0070]
The audio output speaker determination unit 228 that has received the sound image direction
information ADD from the sound image direction calculation unit 227 should perform sound
output from among the speakers 130C to 130SW mounted on the vehicle CR based on the sound
image direction information ADD. Determine the audio output speaker. That is, as shown in FIG.
16, the audio output speaker determination unit 228 considers the ideal sound source direction
based on the ITU standard, the center speaker 130C for the C channel, and the left speaker
130L1 for the L channel. The auxiliary left speaker 130L3 is determined, and for the SL channel,
the surround left speaker 130SL1 and the auxiliary surround left speaker 130SL2 are
determined as audio output speakers. The audio output speaker determination unit 228
determines the light speaker 130R1 and the auxiliary light speaker 130R2 for the R channel, the
surround light speaker 130SR1 for the SR channel, and the subwoofer speaker 130SW for the
LFE channel as an audio output speaker.
[0071]
The auxiliary left speaker 130L2, the auxiliary light speaker 130R3, and the auxiliary surround
light speaker 130SR2 are largely different from the ideal speaker arrangement, and thus no
audio output is performed.
[0072]
The output speaker determination result by the audio output speaker determination unit 228, the
listening position and the listening direction are sent to the audio control unit 225 as the
determination information SPD.
[0073]
Thus, when the reproduction content is designated by the user and a content reproduction
instruction is issued, in the output speaker selection unit 224, when the position detection signal
POD is "driver's seat" and the content type information CTI is "composite content" The audio
output speaker of is determined.
[0074]
<< Operation in Audio Control Unit 225 >> Also, when a content reproduction command is issued
by the user using the operation input unit 150, the read data signal RDD from the drive unit 120
09-05-2019
19
is processed by the drive processing unit 210 to generate an audio. It is separated into a data
signal ADD and a video data signal IDD.
Then, the audio data signal ADD is sent to the audio processing unit 220, and the video data
signal IDD is sent to the video processing unit 230.
[0075]
In this state, when the audio control unit 225 receives the determination information SPD
described above from the output speaker selection unit 224 (more specifically, the audio output
speaker determination unit 228), the audio control unit 225 performs an audio processing unit
based on the determination information SPD. Control the playback processing of audio content in
220.
[0076]
The audio data signal ADD output from the drive processing unit 210 is first sent to the channel
processing unit 221 of the audio processing unit 220.
The channel processing unit 221 reproduces the audio content in accordance with the channel
processing control instruction CPC from the audio control unit 225.
As described above, the channel processing unit 221 includes the channel separation unit 310,
the signal distribution unit 320, and the signal delay unit 320 (see FIG. 9).
[0077]
In the channel processing unit 310, the channel separation unit 310 executes the C to LFE in the
5.1 channel surround system from the audio data signal ADD according to the channel separation
control instruction CSC which is a part of the channel processing control instruction CPC from
the audio control unit 225. Six separate channel data signals SCDC, SCDL, SCDSL, SCDR, SCDSR,
SCDLFE corresponding to the channels are generated.
09-05-2019
20
These data signals are output to the signal distribution unit 320.
[0078]
The signal distribution unit 320 has the same number as the speakers 130C to 130SW based on
the six separate channel data signals SCDC to SCDLFE in accordance with the distribution control
instruction ACC which is a part of the channel processing control instruction CPC from the audio
control unit 225. And 12 distributed channel data signals ACDC to ACDLFE. The distribution
control instruction ACC is generated based on the output speaker determination result in the
determination information SPD from the output speaker selection unit 224.
[0079]
That is, based on the output speaker decision result in decision information SPD, split channel
data signals ACDL1 and ACDL3 are generated from split channel data signal SCDL, and split
channel data signals ACDSL1 and ACDSL2 are created from split channel data signal SCDSL.
Distribution control command ACCL is generated. Further, distribution channel data signals
ACDR1 and ACDR2 are generated from separation channel data signal SCDR, and distribution
control command ACCR to generate distribution channel data signal ACDSR1 is generated from
separation channel data signal SCDSR.
[0080]
Note that, as described above, the processing of the separation channel data signal SCDC for the
C channel and the separation channel data signal SCDLFE for the LFE channel are not performed
in the signal distribution unit 320, and therefore distribution control commands for SCDC and
SCDLFE are not generated.
[0081]
The signal distribution unit 320 generates nine distribution channel data signals ACDC, ACDL1,
ACDL3, ACDSL1, ACDSL2, ACDR1, ACDR2, ACDSR1, and ACDLFE according to the distribution
control command ACC thus generated.
09-05-2019
21
These data signals are output toward the signal delay unit 330.
[0082]
The signal delay unit 330 delays the distribution channel data signal sent from the signal
distribution unit 320 by a predetermined time according to the delay control instruction DLC
which is a part of the channel processing control instruction CPC from the audio control unit
225. The channel data signals PCDC, PCDL1, PCDL3, PCDSL1, PCDSL2, PCDR1, PCDR2, PCDSR1,
PCDLFE are generated. The delay control command DLC is generated based on the listening
position in the determination information SPD from the output speaker selection unit 224.
[0083]
That is, although the delay control command DLC consists of 12 DLCC to DLCLFE, the delay time
is added only to the distribution channel data signal to be processed when the listening position
is "driver's seat" and the content type is "composite content" It is designed to perform control.
When the delay time is given, the delay time given to each signal is read out from the storage
unit of the audio control unit 225 and set in the delay unit, and the distribution channel data
signal is delayed for the set delay period. These delayed data signals are output to the analog
converter 222.
[0084]
The analog conversion unit 222 converts the channel data signals PCDC, PCDL1, PCDL3,
PCDSL1, PCDSL2, PCDR1, PCDR2, PCDSR1, PCDLFE sent from the signal delay unit 330 into
analog signals. Analog signals PBSC, PBSL 1, PBSL 3, PBSSL 1, PBSSL 2, PBSR 1, PBSR 2, PBSSR
1, PBSLFE, which are analog conversion results, are output to the volume adjuster 223.
[0085]
The volume adjuster 223 adjusts the volume of the analog signal sent from the analog converter
222 in accordance with the volume adjustment control VLC from the audio controller 225. The
volume adjustment control command VLC is generated based on the listening position and the
09-05-2019
22
listening attitude in the determination information SPD from the output speaker selecting unit
224.
[0086]
That is, although the volume adjustment control command VLC includes 12 VLCC to VLCLFE, the
volume adjustment control is performed only on the analog signal to be processed when the
listening position is “driver's seat” and the content type is “composite content”. It is
supposed to be. Then, when the volume adjustment is performed, the volume adjustment ratio of
each signal is read out from the storage unit of the audio control unit 225 and adjusted. The
output audio signals AOSC, AOSL1, AOSL3, AOSSL1, AOSSL2, AOSR1, AOSR2, AOSSR1, AOSLFE,
which are the results of this adjustment, are output to the corresponding speakers.
[0087]
The above-mentioned output audio signals sent from the volume adjustment unit 223 are the
center speaker 130C, left speaker 130L1, auxiliary left speaker 130L3, surround left speaker
130SL1, auxiliary surround left speaker 130SL2, light speaker 130R1, auxiliary light speaker
130R2 , Surround sound speaker 130SR1 and subwoofer speaker 130SW, and output toward the
sound field space ASP.
[0088]
When the listening position is “front passenger seat” and the content type is “composite
content”, the output speaker selection unit 224 functions as an audio output speaker for the
center speaker 130 C for the C channel, as shown in FIG. Left speaker 130L1 and auxiliary left
speaker 130L2 for L channel, surround left speaker 130SL1 for SL channel, light speaker 130R1
and auxiliary light speaker 130R3 for R channel, surround light speaker 130SR1 and auxiliary
surround light for SR channel The speaker 130SR2 is selected, and the subwoofer speaker
130SW is selected for the LFE channel.
Then, the processing in the audio control unit 225 performs the same operation as when the
above-described listening position is “driver's seat”.
[0089]
09-05-2019
23
When the listening position is "driver's seat" and the content type is "audio content", as shown in
FIG. 18, the output speaker selection unit 224 functions as an audio output speaker for the
center speaker 130C for channel C, Left speaker 130L1 and auxiliary left speaker 130L2 for L
channel, surround left speaker 130SL1 and auxiliary surround left speaker 130SL2 for SL
channel, light speaker 130R1 and auxiliary light speaker 130R2 for R channel, surround light for
SR channel The speaker 130SR1 is selected, and the subwoofer speaker 130SW is selected for
the LFE channel. The processing in the audio control unit 225 performs the same operation as
that described above.
[0090]
When the listening position is "front passenger seat" and the content type is "audio content", as
shown in FIG. 19, the output speaker selection unit 224 functions as an audio output speaker for
the center speaker 130C for channel C, Left speaker 130L1 and auxiliary left speaker 130L2 for
L channel, surround left speaker 130SL1 for SL channel, light speaker 130R1 and auxiliary light
speaker 130R2 for R channel, surround light speaker 130SR1 and auxiliary surround light for SR
channel The speaker 130SR2 is selected, and the subwoofer speaker 130SW is selected for the
LFE channel. The processing in the audio control unit 225 performs the same operation as that
described above.
[0091]
In addition, when there are a plurality of listening positions in the “rear seat” or the “driver's
seat” or the “passenger seat”, the above processing operation is not performed, and the
center speaker 130 C having a general speaker arrangement, Audio output is performed from the
left speaker 130L1, the surround left speaker 130SL1, the surround light speaker 130SR1, and
the subwoofer speaker 130SW.
[0092]
As described above, in the present embodiment, six speakers are added as compared with a
general speaker arrangement in a vehicle.
Among them, two of the speakers directly face the driver's seat, and the other two speakers
09-05-2019
24
directly face the passenger's seat. This new speaker arrangement can approach the speaker
arrangement in the ITU standard. In addition, it is possible to switch the audio channel output
from each speaker according to the listening position and the listening posture. Therefore,
according to this embodiment, high-quality sound can be reproduced.
[0093]
[Modification of Embodiment] The present invention is not limited to the above embodiment, and
various modifications are possible.
[0094]
For example, in the above embodiment, twelve speakers are provided. However, sounds
corresponding to each channel may be appropriately mixed, and sound may be output from
eleven or less or thirteen or more speakers. .
[0095]
In the above embodiment, the arrangement positions of the speakers 130C to 130SW are the
dashboard, the door case, the rear case, and the rear of the vehicle CR, but the arrangement
positions of the speakers 130C to 130SW are limited thereto. For example, it may be any
position such as a vehicle such as a pillar position of a vehicle.
[0096]
In the above embodiment, each speaker on the left side outputs the sound of the L channel and
SL channel and each speaker on the right side outputs the sound of the R channel and SR channel
as viewed from the center of the space in the vehicle. did.
On the other hand, considering that the listener is facing backwards, etc., the left speaker outputs
the sound of the R channel or SR channel, and the right speaker outputs the sound of the L
channel or SL channel, etc. Any channel sound may be output from any speaker.
[0097]
In the above embodiment, the listening position is determined based on the position detection
signal POD from the seating sensor 160. However, the listening position may be determined from
the operation input unit 150.
09-05-2019
25
[0098]
Further, in the above embodiment, the 5.1 channel surround system is exemplified, but other
systems such as the 6.1 channel surround system can also be adopted.
[0099]
In addition, a navigation device or the like mounted on a vehicle and functioning as a content
reproduction device may have the function of the content reproduction device 100 of the present
embodiment.
[0100]
In the above embodiment, the present invention is applied to a content reproduction apparatus
for reproducing content data stored in the content media CMD, but the present invention is
applied to a receiver of broadcast waves such as terrestrial digital television broadcasting. You
can also.
[0101]
In the above embodiment, the present invention is applied to a content reproduction apparatus
for reproducing content data recorded in a multi-channel method, but for example, the content
data has a 2-channel configuration or the broadcast reception result has a 2-channel
configuration If the audio signal has a configuration other than the multi-channel configuration,
the present invention is applied to an apparatus which converts the 2-channel configuration into
a multi-channel configuration such as 5.1 channel and provides it to the user. You can also.
[0102]
In the above embodiment, the present invention is applied to a content reproduction apparatus
mounted on a vehicle, but the present invention is also applied to an apparatus having an
acoustic reproduction function mounted on a mobile other than the vehicle. The present
invention can also be applied to an apparatus having a sound reproducing function that can not
be mounted on a moving object.
[0103]
A central processing unit (CPU: Central Processing Unit), DSP (Digital Signal Processor), read only
09-05-2019
26
memory (ROM: Read Only Memory), random access memory (RAM) Even if a part of the
processing in the above embodiment is executed by configuring a computer as an arithmetic unit
provided with a random access memory or the like and executing a prepared program by the
computer. Good.
This program is recorded on a computer-readable recording medium such as a hard disk, a CDROM, a DVD, etc., and is read from the recording medium and executed by the computer.
Also, this program may be acquired in the form of being recorded on a portable recording
medium such as a CD-ROM, a DVD or the like, or may be acquired in the form of delivery via a
network such as the Internet. It is also good.
[0104]
It is a figure for demonstrating the general speaker arrangement | positioning in a vehicle.
It is a figure for demonstrating the speaker arrangement | positioning by ITU-R recommendation.
FIG. 1 is a block diagram schematically showing a configuration of a content reproduction
apparatus according to an embodiment of the present invention.
It is a figure for demonstrating the arrangement position of 12 speakers of FIG.
It is a block diagram which shows the structure of the control unit of FIG.
It is a block diagram which shows the structure of the audio processing part of FIG.
It is a block diagram which shows the structure of the output speaker selection part of FIG. It is a
figure for demonstrating a listening position and a listening posture. It is a block diagram which
shows the structure of the channel process part of FIG. It is a block diagram which shows the
09-05-2019
27
structure of the signal distribution part of FIG. It is a block diagram which shows the structure of
the left side distribution part of FIG. It is a block diagram which shows the structure of the
compound switch part of FIG. It is a block diagram which shows the structure of the light side
distribution part of FIG. It is a block diagram which shows the structure of the compound switch
part of FIG. It is a block diagram which shows the structure of the signal delay part of FIG. It is a
figure for demonstrating arrangement | positioning of an audio | voice output speaker in case a
listening position is a driver's seat and a listening attitude | position is a direction which looks at
a monitor. It is a figure for demonstrating arrangement | positioning of an audio | voice output
speaker in case a listening position is a front passenger seat, and a listening attitude | position is
a direction which looks at a monitor. It is a figure for demonstrating arrangement | positioning of
an audio | voice output speaker in case a listening position is a driver's seat and it is a direction
which a listening attitude | position sees the front. It is a figure for demonstrating arrangement |
positioning of an audio | voice output speaker in case a listening position is a front passenger
seat, and it is a direction where a listening posture sees the front.
Explanation of sign
[0105]
100 ... content reproduction apparatus 130C-130SW ... speaker 140 ... display unit (display
means) 150 ... operation input unit (operation input means) 160 ... seating sensor (detection
means) 223 ... volume control unit (volume control unit) 226 ... listening attitude Calculation unit
(estimation calculation means) 227 ... sound image direction calculation unit (direction
calculation means) 228 ... voice output speaker determination unit (determination means) 310 ...
channel separation unit (individual channel signal generation means) 330 ... signal delay unit
(delay adjustment means )
09-05-2019
28
Документ
Категория
Без категории
Просмотров
0
Размер файла
40 Кб
Теги
jp2008227942
1/--страниц
Пожаловаться на содержимое документа