Audio processing apparatus
US 20110142262Al
(19)
United States
(12) Patent Application Publication (10) Pub. N0.: US 2011/0142262 A1
SUNAGA et al.
(54)
(43) Pub. Date:
AUDIO PROCESSING APPARATUS
(76) Inventors..
Publication Classi?cation
Tadaharu SUNAGA, Osaka (JP),.
Susumu KOAZE, Osaka (JP);
( 51)
Junichi KOBAYASHI, Osaka (JP);
(52)
N0ri0 ETOH, Osaka (JP); Yataro
YAJIMA, Osaka (JP); Shintaro
(21) Appl- NO-I
_
(22) Flled?
Int. Cl.
H0317 99/00
(200901)
us. Cl. ...................................................... .. 381/120
57
ABSTRACT
JO, Osaka (JP); Ayako
( )
NAKATANI, Osaka (JP); Yohei
A switching section causes the ?rst ampli?cation section to
KOIKE, Osaka (JP)
amplify the expansion left audio signal and supply the ampli
?ed expansion left audio signal to the ?rst speaker terminal
and causing the second ampli?cation section to amplify the
expansion right audio signal and supply the ampli?ed expan
sion right audio signal to the second speaker terminal When
13/022,698
Feb- 81 2011
_
_
the Bi-Amp function is not used. The switching section
Related U‘s‘ Apphcatlon Data
causes the ?rst ampli?cation section to amplify the left audio
(63) Continuation-in-part of application No. 12/564,196,
?led on Sep 22’ 2009
(30)
Jun. 16, 2011
Signal for Bi'AmP and Supply the ampli?ed left audio Signal
for Bi-Amp the ?rst speaker terminal and causing the second
ampli?cation sectlon to amplify the right audio signal for
Foreign Application Priority Data
Bi-Amp and supply the ampli?ed right audio signal for Bi
Amp to the second speaker terminal When the Bi-Amp func
Feb. 3, 2009
(JP) ................................. .. 2009-23103
tion is used
AV AMPLIFIER
1
C)
LISTENER
Patent Application Publication
Jun. 16, 2011 Sheet 1 0f 14
FIG. 1
AV AMPLIFIER
l
C)
LISTENER
US 2011/0142262 A1
Patent Application Publication
Jun. 16, 2011 Sheet 2 0f 14
US 2011/0142262 A1
FIG. 2
SPEAKERS
300
AV AMPLIFIER 1
AUDIO
PROCESSING
UNIT 5
HDMI
HDMI
BD PLAYER
RECEIVING
100
UNIT 3
UNIT 4
CONTROL
UNIT 2
DISPLAY
TRANSMITTING —@>— APPARATUS
OPERATION
UNIT 6
DISPLAY UNIT 7
200
Patent Application Publication
Jun. 16, 2011 Sheet 3 0f 14
US 2011/0142262 A1
FIG. 3
LW
L
C
R
RW
SW
SL
Q
SR
LISTENER
SBL
SBR
Patent Application Publication
Jun. 16, 2011 Sheet 4 0f 14
US 2011/0142262 A1
FIG. 4
PRE-OUT UNIT 11
POWER AMPLIFIERS 12
SP RELAY 13
SP TERMINALS 14
L
.
1.mm
m
m.
L1
Habd.Ce
4
u
Patent Application Publication
Jun. 16, 2011 Sheet 5 0f 14
US 2011/0142262 A1
FIG. 5
EETERMINED
rm
AREcHANNELs
'
YES
ARE mam Paw
"
ARE u-mw RH
_
-
YES
'
RESBLAN
_
mm‘? 513mm?
YE$
-
ENGLLFTJEFB m
_
9
31:
YES
E
i?
m
Patent Application Publication
Jun. 16, 2011 Sheet 6 0f 14
US 2011/0142262 A1
FIG. 6
PRE-OUT UNIT 2]
POWER AMPLIFIERS 22
SP RELAY 23
SP TERMINALS 24
$81.
55R
4
Patent Application Publication
Jun. 16, 2011 Sheet 7 0f 14
US 2011/0142262 A1
FIG. 7
-
ARE QHANNELg,
YES
UNEQUELY DETERMENEQ 3y
US'E'ENINQ Maggi,‘
'
________ _.
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GQNNFROL SWEY$HE$
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WHEGH ARE UNEGUELY
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AND RW
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Patent Application Publication
Jun. 16, 2011 Sheet 8 0f 14
US 2011/0142262 A1
FIG. 8
§5c
PRE-OUT UNIT 3]
POWER AMPLIFIERS 32
SP RELAY 33
SP TERMINALS 34
Patent Application Publication
Jun. 16, 2011 Sheet 9 0f 14
US 2011/0142262 A1
FIG. 9
.SSD
PRE-OUT UNIT 41
POWER AMPLIFIERS 42
SP RELAY 43
SP TERMINALS 44
Patent Application Publication
Jun. 16, 2011 Sheet 10 0f 14
US 2011/0142262 A1
FIG. 10
5E
PRE-OUT UNIT 41
POWER AMPLIFIERS 42
SP RELAY 43
SP TERMINALS 44
Patent Application Publication
Jun. 16, 2011 Sheet 11 0f 14
US 2011/0142262 A1
FIG. 11
‘S 5F
PRE-OUT UNIT 41
POWER AMPLIFIERS 42
SP RELAY 43
SP TERMINALS 44
Patent Application Publication
Jun. 16, 2011 Sheet 12 0f 14
US 2011/0142262 A1
FIG. 12
Pre-out unit 51
Power ampll?er 52
SP relay 53
-----------------l
SP terminal 54
54a
Patent Application Publication
Jun. 16, 2011 Sheet 13 0f 14
US 2011/0142262 A1
FIG. 13
55H
PRE—OUT UNIT 41
POWER AMPLIFIERS 42
SP RELAY 43
SP TERMINALS 44
Patent Application Publication
Jun. 16, 2011 Sheet 14 0f 14
US 2011/0142262 A1
FIG. 14
PRE-OUT UNIT 41
POWER AMPLIFIERS 42
SP RELAY 43
SP TERMINALS 44
US 2011/0142262 A1
AUDIO PROCESSING APPARATUS
[0001]
This is a Continuation-in-Part of co-pending US.
application Ser. No. 12/564,196 ?led on Sep. 22, 2009, the
entire contents of Which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
[0002]
[0003]
1. Field of the Invention
The present invention relates to an audio processing
apparatus.
[0004] 2. Description of the Related Art
[0005] An audio playback system including a BD player, an
AV ampli?er, and a display apparatus has been used. Audio
data transmitted from the BD player to the AV ampli?er is
obtained by encoding multichannel audio data. For example,
the multichannel audio data includes, as shoWn in FIG. 3, a
left audio signal L, a right audio signal R, a center audio signal
C, a loW-frequency audio signal SW, a surround left audio
signal SL, a surround right audio signal SR, a surround back
left audio signal SBL, and a surround back right audio signal
SBR. Recently, HD (High De?nition) related audio formats
such as Dolby True HD, Dolby Digital Plus, and DTS-HD
have appeared. In these formats, an upper left audio signal
LH, an upper right audio signal RH, an outer left audio signal
LW, and an outer right audio signal RW are further added.
[0006]
HoWever, When ampli?ers associated With audio
signals of all these channels are provided to the AV ampli?er,
ampli?ers for 1 1.1 channels in total are to be provided, result
ing in very high cost. Furthermore, the ampli?ers for further
2 channels are needed When the left audio signal and the right
audio signal are reproduced using the Bi-Amp function,
resulting in very high cost. If performing the Bi-Amp func
tion using ampli?ers for the surround back left audio signal
and the surround back right audio signal, the left audio signal
and the right audio signal are not able to be reproduced by
using the Bi-Amp function in the state that the surround back
left audio signal and the surround back right audio signal are
reproduced.
Bi-Amp; a third speaker terminal that outputs the surround
back left audio signal; a fourth speaker terminal that outputs
the surround back right audio signal; and sWitching section
for causing the ?rst ampli?cation section to amplify the
expansion left audio signal and supply the ampli?ed expan
sion left audio signal to the ?rst speaker terminal and causing
the second ampli?cation section to amplify the expansion
right audio signal and supply the ampli?ed expansion right
audio signal to the second speaker terminal When the Bi-Amp
function is not used; and causing the ?rst ampli?cation sec
tion to amplify the left audio signal for Bi-Amp and supply
the ampli?ed left audio signal for Bi-Amp to the ?rst speaker
terminal and causing the second ampli?cation section to
amplify the right audio signal for Bi-Amp and supply the
ampli?ed right audio signal for Bi-Amp to the second speaker
terminal When the Bi-Amp function is used.
[0009] Preferably, the third ampli?cation section ampli?es
the surround back left audio signal or a center audio signal for
Bi-Amp; the third speaker terminal outputs the surround back
left audio signal or the center audio signal for Bi-Amp, and
the sWitching section causes the third ampli?cation section to
amplify the surround back left audio signal and supply the
ampli?ed surround back left audio signal to the third speaker
terminal When the Bi-Amp function is not used; and causes
the third ampli?cation section to amplify the center audio
signal for Bi-Amp and supply the ampli?ed center audio
signal for Bi-Amp to the third speaker terminal When the
Bi-Amp function is used.
[0010] Preferably, When the Bi-Amp function is used, the
sWitching section causes the fourth ampli?cation section to
amplify the adding signal that is a signal produced by adding
the surround back left audio signal and the surround back
right audio signal and supply the ampli?ed adding signal to
the fourth speaker terminal.
[0011] Preferably, the third ampli?cation section ampli?es
the surround back left audio signal or the surround left audio
signal for Bi-Amp; the fourth ampli?cation section ampli?es
the surround back right audio signal or the surround right
audio signal for Bi-Amp; the third speaker terminal outputs
the surround back left audio signal or the surround left audio
SUMMARY OF THE INVENTION
[0007]
Jun. 16, 2011
An object of the present invention is to provide an
audio processing apparatus capable of amplifying the left
audio signal L and the right audio signal R using the Bi-Amp
function in the state that the surround back left audio signal
SBL and the surround back right audio signal are reproduced
Without providing the dedicated ampli?ers for the Bi-Amp
function.
[0008] According to a preferred embodiment of the present
invention, an audio processing apparatus comprises: a ?rst
ampli?cation section for amplifying an expansion left audio
signal Whish is one of an outer left audio signal, an upper left
audio signal and a center left audio signal, or a left audio
signal for Bi-Amp; a second ampli?cation section for ampli
fying an expansion right audio signal Whish is one of an outer
right audio signal, an upper right audio signal and a center
right audio signal, or a right audio signal for Bi-Amp; a third
ampli?cation section for amplifying a surround back left
audio signal; a fourth ampli?cation section for amplifying a
surround back right audio signal; a ?rst speaker terminal that
outputs the expansion left audio signal or the left audio signal
for Bi-Amp; a second speaker terminal that outputs the
expansion right audio signal or the right audio signal for
signal for Bi-Amp, the fourth speaker terminal outputs the
surround back right audio signal or the surround right audio
signal for Bi-Amp, and the sWitching section causes the third
ampli?cation section to amplify the surround back left audio
signal and supply the ampli?ed surround back left audio
signal to the third speaker terminal and the fourth ampli?ca
tion section to amplify the surround back right audio signal
and supply the ampli?ed surround back right audio signal to
the fourth speaker terminal When the Bi-Amp function is not
used; and causes the third ampli?cation section to amplify the
surround left audio signal for Bi-Amp and supply the ampli
?ed surround left audio signal for Bi-Amp to the third speaker
terminal and the fourth ampli?cation section to amplify the
surround right audio signal for Bi-Amp and supply the ampli
?ed surround right audio signal for Bi-Amp to the fourth
speaker terminal When the Bi-Amp function is used.
[0012] Preferably, the audio processing apparatus further
comprising: a ?fth speaker terminal that outputs the second
expansion left audio signal Whish is one of the outer left audio
signal, the upper left audio signal and the center left audio
signal and is different from the expansion left audio signal; a
sixth speaker terminal that outputs the second expansion right
audio signal Whish is one of the outer right audio signal, the
upper right audio signal and the center right audio signal and
US 2011/0142262 A1
is different from the expansion right audio signal; and channel
determination section for determining Which one of a com
bination of the expansion left audio signal and the expansion
right audio signal and a combination of the second expansion
left audio signal and second expansion right audio signal is
included in multichannel audio data. In case that the Bi-Amp
function is not used, the sWitching section causes the ?rst
ampli?cation section to amplify the expansion left audio sig
nal and supply the ampli?ed expansion left audio signal to the
?rst speaker terminal and causes the second ampli?cation
section to amplify the expansion right audio signal and supply
the ampli?ed expansion right audio signal to the second
speaker terminal When the combination of the expansion left
audio signal and the expansion right audio signal is deter
mined to be included; and causes the ?rst ampli?cation sec
tion to amplify the second expansion left audio signal and
supply the ampli?ed second expansion left audio signal to the
?fth speaker terminal and causes the second ampli?cation
section to amplify the second expansion right audio signal
and supply the ampli?ed second expansion right audio signal
to the sixth speaker terminal When the combination of the
second expansion left audio signal and second expansion
right audio signal is determined to be included.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013]
FIG. 1 is a diagram shoWing an arrangement of an
AV ampli?er 1 and speakers;
[0014]
FIG. 2 is a diagram shoWing an audio playback
system;
[0015]
FIG. 3 is a diagram shoWing channels of audio sig
nals;
[0016]
FIG. 4 is a diagram shoWing an audio processing
unit 5;
[0017] FIG. 5 is a ?owchart shoWing a process performed
by a control unit 2;
[0018] FIG. 6 is a diagram shoWing an audio processing
unit 5B;
[0019]
FIG. 7 is a ?owchart shoWing a process performed
by the control unit 2;
[0020]
FIG. 8 is a diagram shoWing an audio processing
unit SC;
[0021]
FIG. 9 is a diagram shoWing an audio processing
unit 5D;
[0022]
FIG. 10 is a diagram shoWing an audio processing
unit SE;
[0023]
FIG. 11 is a diagram shoWing an audio processing
unit SF;
[0024]
FIG. 12 is a diagram shoWing an audio processing
unit 5G;
[0025] FIG. 13 is a diagram shoWing an audio processing
unit 5H; and
[0026] FIG. 14 is a diagram shoWing an audio processing
unit 5I.
DETAILED DESCRIPTION OF THE PREFERRED
EMBODIMENTS
[0027] Audio playback systems including a disc playback
apparatus (hereinafter, referred to as the BD player), an audio
processing apparatus (hereinafter, referred to as the AV
ampli?er), and a display apparatus, according to preferred
embodiments of the present invention Will be speci?cally
described beloW With reference to the draWings but the
present invention is not limited thereto.
Jun. 16, 2011
[0028] FIG. 1 is a diagram shoWing an example of an
arrangement of an AV ampli?er 1 and speakers. To the AV
ampli?er 1 are connected a left speaker SL, a right speaker
SR, a center speaker SC, a loW-frequency speaker SSW, a
surround left speaker SSL, a surround right speaker SSR, a
surround back left speaker SSBL, a surround back right
speaker SSBR, an upper left speaker SLH, an upper right
speaker SRH, an outer left speaker SLW, and an outer right
speaker SRW.
[0029] FIG. 2 is a block diagram shoWing a con?guration of
an audio playback system. A BD player 100, an AV ampli?er
1, and a display apparatus 200 conform to the HDMI stan
dard, for example, and are connected to each other via HDMI
cables. The BD player 100 transmits HDMI data including
multichannel audio data and video data to the AV ampli?er 1.
The AV ampli?er 1 ampli?es the multichannel audio data
included in the HDMI data received from the BD player 100
and outputs the ampli?ed multichannel audio data to speak
ers. Also, the AV ampli?er 1 transmits the HDMI data includ
ing video data to the display apparatus 200. The display
apparatus 200 displays the video data included in the HDMI
data received from the AV ampli?er 1.
[0030] The AV ampli?er 1 has a control unit 2, an HDMI
receiving unit 3, an HDMI transmitting unit 4, an audio pro
cessing unit 5, an operation unit 6, a display unit 7, and HDMI
terminals 8 and 9. To the AV ampli?er 1 are connected speak
ers 300 (corresponding to the speakers in FIG. 1).
[0031] The HDMI receiving unit 3 receives HDMI data
transmitted from the BD player 100, generates original video
data from the received HDMI data, and supplies the video
data to the HDMI transmitting unit 4. Also, the HDMI receiv
ing unit 3 generates original multichannel audio data from the
received HDMI data and supplies the multichannel audio data
to the audio processing unit 5.
[0032] The audio processing unit 5 decodes the multichan
nel audio data supplied from the HDMI receiving unit 3,
performs processes including an acoustic process, a D/A con
version process, a volume control process, an ampli?cation
process, and the like, on the decoded multichannel audio data,
and supplies audio signals of various channels to the speakers
3 00.
[0033]
Multichannel audio data to be supplied to the audio
processing unit 5 Will be described. In HD (High De?nition)
related audio formats such as Dolby True HD, Dolby Digital
Plus, and DTS-HD, as shoWn in FIG. 3, there are, for
example, a left audio signal L (front left audio signal), a right
audio signal R (front right audio signal), a center audio signal
C, a loW-frequency audio signal SW, a surround left audio
signal SL, a surround right audio signal SR, a surround back
left audio signal SBL, a surround back right audio signal
SBR, an outer left audio signal LW (?rst left audio signal), an
outer right audio signal RW (?rst right audio signal), an upper
left audio signal LH (second left audio signal), an upper right
audio signal RH (second right audio signal), and the like.
[0034] The upper left audio signal LH is an audio signal
played back from a position on the upper side of the left audio
signal L (i.e., the front upper left side of a user). The upper
right audio signal RH is an audio signal played back from a
position on the upper side of the right audio signal R (i.e., the
front upper right side of the user). The outer left audio signal
LW is an audio signal played back from a position on the outer
side (left side) of the left audio signal L (i.e., the front outer
left side of the user). The outer right audio signal RW is an
US 2011/0142262 A1
Jun. 16, 2011
audio signal played back from a position on the outer side
is in an on state. The sWitch S13d sWitches Whether to supply
(right side) of the right audio signal R (i.e., the front outer
right of the user).
the outer right audio signal RH inputted from the ampli?er
[0035] FIG. 4 is a block diagram showing the main part of
the audio processing unit 5. The audio processing unit 5 has a
brought into an on state When the sWitch S11e is in an on state.
pre-out unit 11, poWer ampli?ers 12, an SP (speaker) relay 13,
and SP (speaker) terminals 14. In FIG. 4, circuits for basic 5.1
channels (a left audio signal L, a right audio signal R, a center
audio signal C, a loW-frequency audio signal SW, a surround
left audio signal SL, and a surround right audio signal SR) are
the same as those in conventional art and thus are not shoWn.
A DSP and the like provided in a previous stage to the pre-out
unit 11 are not shoWn, either.
[0036] The DSP decodes and D/A converts multichannel
audio data supplied from the HDMI receiving unit 3 and
thereby generates audio signals of various channels. The gen
erated audio signals are supplied to the pre-out unit 11.
[0037] The pre-out unit 11 includes sWitches S1111 to S11]:
The sWitch S1111 sWitches Whether to output a surround back
left audio signal SBL to an ampli?er 1211. The sWitch S11b
sWitches Whether to output an upper left audio signal LH to
the ampli?er 1211. The sWitch S11c sWitches Whether to out
put an outer left audio signal LW to the ampli?er 1211.Any one
of the sWitches S1111 to S110 is brought into an on state and
any one of the surround back left audio signal SBL, the upper
left audio signal LH, and the outer left audio signal LW is
supplied to the ampli?er 1211.
[0038]
The sWitch Slid sWitches Whether to output a sur
round back right audio signal SBR to an ampli?er 12b. The
12b, to an upper right SP terminal 1411. The sWitch S131! is
The sWitch 513f sWitches Whether to supply the outer right
audio signal RW inputted from the ampli?er 12b, to an outer
right SP terminal 14f The sWitch S13f is brought into an on
state When the sWitch S11f is in an on state.
[0042] The SP terminals 14 include the SP terminals 1411 to
14f The surround back left speaker SSBL is connected to the
surround back left SP terminal 1411, the surround back right
speaker SSBR is connected to the surround back right SP
terminal 1411, the upper left speaker SLH is connected to the
upper left SP terminal 140, the upper right speaker SRH is
connected to the upper right SP terminal 1411, the outer left
speaker SLW is connected to the outer left SP terminal 14e,
and the outer right speaker SRW is connected to the outer
right SP terminal 14f
[0043] Returning to FIG. 2, the HDMI transmitting unit 4
converts the video data supplied from the HDMI receiving
unit 3 to HDMI data and transmits the HDMI data to the
display apparatus 200.
[0044]
The control unit 2 controls each unit based on an
operating program of the AV ampli?er 1 stored in a memory
(not shoWn) built therein or connected thereto. The control
unit 2 is, for example, a microcomputer or CPU.
[0045] The control unit 2 performs control to sWitch
betWeen the sWitches S1111 to S11fand S1311 to S13f(a detail
of Which Will be described later).
sWitch S11e sWitches Whether to output an upper right audio
[0046] The display unit 7 displays images shoWing the SP
signal RH to the ampli?er 12b. The sWitch S11f sWitches
terminals 1411 to 14f and the channels and functions of audio
Whether to output an outer right audio signal RW to the
signals assigned to the SP terminals 1411 to 14f (a detail of
Which Will be described later).
ampli?er 1211. Any one of the sWitches Slid to S11fis brought
into an on state and any one of the surround back right audio
[0047]
signal SBR, the upper right audio signal RH, and the outer
right audio signal RW is supplied to the ampli?er 1211.
[0039] The poWer ampli?ers 12 include the ampli?ers 1211
and 12b. The ampli?er 1211 ampli?es the surround back left
by the control unit 2. The HDMI receiving unit 3 generates
original multichannel audio data from HDMI data and sup
plies the multichannel audio data to the audio processing unit
5. The audio processing unit 5 decodes the multichannel
audio signal SBL, the upper left audio signal LH, or the outer
audio data, reads channel information included in an infor
mation area of the multichannel audio data, and supplies the
channel information to the control unit 2.
[0048] The control unit 2 determines Whether a determina
left audio signal LW inputted thereto and supplies the ampli
?ed audio signal to the SP relay 13 (a sWitch S1311, S13c, or
S13e). The ampli?er 12b ampli?es the surround back right
audio signal SBR, the upper right audio signal RH, or the
outer right audio signal RW inputted thereto and supplies the
ampli?ed audio signal to the SP relay 13 (a sWitch S1311,
S1311, or S13f).
[0040] The SP relay 13 has the relay sWitches (hereinafter,
referred to as the sWitches) S1311 to S13]: The sWitch S1311
sWitches Whether to supply the surround back left audio sig
nal SBL inputted from the ampli?er 1211, to a surround back
left SP terminal 1411. The sWitch S1311 is brought into an on
state When the sWitch S1111 is in an on state. The sWitch S13c
sWitches Whether to supply the upper left audio signal LH
inputted from the ampli?er 1211, to an upper left SP terminal
FIG. 5 is a ?owchart shoWing a process performed
tion as to Whether Which one of a combination of the surround
back left audio signal SBL and the surround back right audio
signal SBR, a combination of the upper left audio signal LH
and the upper right audio signal RH, and a combination of the
outer left audio signal LW and the outer right audio signal RW
is supplied to corresponding SP terminals is uniquely made
by a listening mode selected by a user operation (S1). If the
determination is uniquely made (YES in S1), then the control
unit 2 controls the sWitches S1111 to S11fand S1311 to S13fto
supply a combination to be determined to corresponding SP
terminals (S2).
140. The sWitch S130 is brought into an on state When the
sWitch S111) is in an on state. The sWitch S13e sWitches
[0049] If the determination is not uniquely made (NO in
S1), then the control unit 2 determines Whether in the listen
ing mode selected by the user operation a channel combina
Whether to supply the outer left audio signal LW inputted
tion to be supplied to SP terminals is determined by a user
from the ampli?er 1211, to an outer left SP terminal 14e. The
sWitch S13e is brought into an on state When the sWitch S110
ampli?er 12b, to a surround back right SP terminal 14b. The
operation (S3). If a channel combination is thus determined
(YES in S3), then the control unit 2 controls the sWitches
S1111 to S11fand S1311 to S13fto supply a channel combina
tion to be determined to corresponding SP terminals (S4, S5,
and S8 to S10).
[0050] If a channel combination is not thus determined (NO
sWitch S131) is brought into an on state When the sWitch Slid
in S3), then the control unit 2 determines Which one of a
is in an on state.
[0041]
The sWitch S13b sWitches Whether to supply the
surround back right audio signal SBR inputted from the
US 2011/0142262 A1
Jun. 16, 2011
combination of the surround back left audio signal SBL and
the surround back right audio signal SBR, a combination of
the upper left audio signal LH and the upper right audio signal
RH, and a combination of the outer left audio signal LW and
the outer right audio signal RW is included, based on the
channel information of input signals included in the multi
channel audio data supplied from the audio processing unit 5
back left audio signal SBL to a sWitch S2311. The ampli?er
(S6, S7, and S11).
?es the upper left audio signal LH or the outer left audio
[0051] If a combination of the outer left audio signal LW
and the outer right audio signal RW is included in the multi
channel audio data (YES in S6), then the control unit 2 con
trols the sWitches to supply the outer left audio signal LW to
the outer left SP terminal 14e and supply the outer right audio
signal RW to the outerright SP terminal 14f(S8). Speci?cally,
[0057] PoWer ampli?ers 22 include ampli?ers 2211 to 2211.
The ampli?er 2211 ampli?es a surround back left audio signal
SBL inputted thereto and supplies the ampli?ed surround
22b ampli?es a surround back right audio signal SBR input
ted thereto and supplies the ampli?ed surround back right
audio signal SBR to a sWitch S23b. The ampli?er 22c ampli
signal LW inputted thereto and supplies the ampli?ed audio
signal to a sWitch S23c or S23e. The ampli?er 22d ampli?es
the upper right audio signal RH or the outer right audio signal
RW inputted thereto and supplies the ampli?ed audio signal
to a sWitch S2311 or S23f
the control unit 2 controls the sWitches S11c, S11], S13e, and
[0058] An SP relay 23 includes the sWitches S2311 to S23]:
The sWitch S2311 sWitches Whether to supply the surround
S13f to be an on state and other sWitches to be an off state.
back left audio signal SBL inputted from the ampli?er 2211, to
[0052] If a combination of the upper left audio signal LH
and the upper right audio signal RH is included in the multi
channel audio data (NO in S6 andYES in S7), then the control
unit 2 controls the sWitches to supply the upper left audio
signal LH to the upper left SP terminal 140 and supply the
upper right audio signal RH to the upper right SP terminal 141!
a surround back left SP terminal 2411. The sWitch S23c
sWitches Whether to supply the upper left audio signal LH
inputted from the ampli?er 220, to an upper left SP terminal
240. The sWitch S230 is brought into an on state When the
sWitch S2111 is in an on state. The sWitch S23e sWitches
Whether to supply the outer left audio signal LW inputted
S11b, S11e, S130, and S131! to be an on state and other
from the ampli?er 220, to an outer left SP terminal 24e. The
sWitch S23e is brought into an on state When the sWitch S211)
sWitches to be an off state.
is in an on state.
(S9). Speci?cally, the control unit 2 controls the sWitches
[0053]
If a combination of the surround back left audio
signal SBL and the surround back right audio signal SBR is
included in the multichannel audio data (NO in S6, NO in S7,
andYES in S11), then the control unit 2 controls the sWitches
to supply the surround back left audio signal SBL to the
surround back left SP terminal 1411 and supply the surround
back right audio signal SBR to the surround back right SP
terminal 14b (S10). Speci?cally, the control unit 2 controls
the sWitches S1111, Slid, S1311, and S131) to be an on state and
other sWitches to be an off state.
[0054] If none of a combination of the outer left audio
signal LW and the outer right audio signal RW, a combination
of the upper left audio signal LH and the upper right audio
signal RH, and a combination of the surround back left audio
signal SBL and the surround back right audio signal SBR is
included in the multichannel audio data (NO in S1 1), then the
control unit 2 controls the sWitches not to supply audio signals
of all these channels to the SP terminals (S12). Speci?cally,
the control unit 2 controls all the sWitches to be an off state.
[0055] As described above, only With the provision of the
tWo ampli?ers 1211 and 1211, by determining channel infor
mation included in multichannel audio data to be inputted and
sWitching betWeen the sWitches, any one of a combination of
the surround back left audio signal SBL and the surround
back right audio signal SBR, a combination of the outer left
audio signal LW and the outer right audio signal RW, and a
combination of the upper left audio signal LH and the upper
[0059]
The sWitch S23b sWitches Whether to supply the
surround back right audio signal SBR inputted from the
ampli?er 22b, to a surround back right SP terminal 24b. The
sWitch S2311 sWitches Whether to supply the upper right audio
signal RH inputted from the ampli?er 2211, to an upper right
SP terminal 2411. The sWitch S231! is brought into an on state
When the sWitch S210 is in an on state. The sWitch S23f
sWitches Whether to supply the outer right audio signal RW
inputted from the ampli?er 2211, to an outer right SP terminal
24f The sWitch S23f is brought into an on state When the
sWitch S211! is in an on state.
[0060] FIG. 7 is a ?owchart shoWing a process performed
by a control unit 2 according to the present example. S11 to
S14 are the same as S1 to S5 in FIG. 5 and thus description
thereof is omitted.
[0061] The control unit 2 determines Whether a combina
tion of the outer left audio signal LW and the outer right audio
signal RW is included in multichannel audio data (S15). If
included (YES in S15), then the control unit 2 controls the
sWitches to supply the outer left audio signal LW to the outer
left SP terminal 24e and supply the outer right audio signal
RW to the outer right SP terminal 24f (S16). Speci?cally, the
control unit 2 controls the sWitches S2111, S2111, S23e, and
S23fto be an on state and the sWitches S2111, S210, S230, and
S231! to be an off state.
[0062]
If determined to be NO in S15, then the control unit
2 determines Whether a combination of the upper left audio
right audio signal RH can be ampli?ed and the ampli?ed
signals can be supplied to corresponding SP terminals.
[0056] Next, an audio processing unit 5B of anAV ampli?er
according to another preferred embodiment of the present
signal LH and the upper right audio signal RH is included in
the multichannel audio data (S18). If included (YES in S18),
invention Will be described With reference to FIG. 6. A pre-out
unit 21 includes sWitches S2111 to S2111. The sWitch S2111
sWitches Whether to output an upper left audio signal LH to an
ampli?er 220. The sWitch S21b sWitches Whether to output an
outer left audio signal LW to the ampli?er 220. The sWitch
S21c sWitches Whether to output an upper right audio signal
RH to an ampli?er 2211. The sWitch S2111 sWitches Whether to
and supply the upper right audio signal RH to the upper right
SP terminal 241! (S17). Speci?cally, the control unit 2 controls
output an outer right audio signal RW to the ampli?er 2211.
then the control unit 2 controls the sWitches to supply the
upper left audio signal LH to the upper left SP terminal 240
the sWitches S2111, S210, S230, and S231! to be an on state and
the sWitches S2111, S2111, S23e, and S23fto be an off state.
[0063] If determined to be NO in S18, then the control unit
2 controls the sWitches not to supply a combination of the
outer left audio signal LW and the outer right audio signal RW
and a combination of the upper left audio signal LH and the
US 2011/0142262 A1
Jun. 16, 2011
upper right audio signal RH to corresponding SP terminals
(S19). Speci?cally, the control unit 2 controls the sWitches
sWitches Whether to supply the outer left audio signal LW
inputted from the ampli?er 32a, to an outer left SP terminal
S2111 to S21d and S230 to S23].to be an off state.
34e. The sWitch S33e is brought into an on state When the
sWitch S31a is in an on state and the outer left signal LW is
[0064] Next, an audio processing unit 5C of anAV ampli?er
according to still another preferred embodiment of the
present invention Will be described With reference to FIG. 8.
The audio processing unit 5C is a Variant of the audio pro
cessing unit 5 in FIG. 4 and is con?gured to be able to use
Zone2 and Bi-Amp functions.
[0065] A pre-out unit 31 includes sWitches S31a to S31].
The sWitch S31a sWitches Whether to output any one of a
surround back left audio signal SBL, an upper left audio
signal LH, and an outer left audio signal LW inputted from a
DSP, to an ampli?er 32a. Speci?cally, by an instruction from
a control unit 2, in the DSP, as a channel to be supplied to the
sWitch S31a, any one of the surround back left audio signal
SBL, the upper left audio signal LH, and the outer left audio
signal LW is selected. The sWitch S31b sWitches Whether to
output a Zone2 left audio signal Z2L inputted from the DSP,
to the ampli?er 32a. The sWitch S31c sWitches Whether to
supplied to the sWitch S31a.
[0069] The sWitch S33b sWitches Whether to supply the
surround back right audio signal SBR, the Zone2 right audio
signal Z2R, or the right audio signal R (for Bi-Amp) inputted
from the ampli?er 32b, to a surround back right SP terminal
34b. The sWitch S331) is brought into an on state When the
sWitch S3 1d is in an on state and the surround back right audio
signal SBR is supplied to the sWitch S31d, When the sWitch
S31e is in an on state, or When the sWitch S31]is in an on state.
The sWitch S33d sWitches Whether to supply the upper right
audio signal RH inputted from the ampli?er 32b, to an upper
right SP terminal 34d. The sWitch S33d is brought into an on
state When the sWitch S31d is in an on state and the upper right
audio signal RH is supplied to the sWitch S31d. The sWitch
S33] sWitches Whether to supply the outer right audio signal
output a left audio signal L (for Bi-Amp) inputted from the
RW inputted from the ampli?er 32b, to an outer right SP
terminal 34]. The sWitch S33]is brought into an on state When
DSP, to the ampli?er 3211. Any one of the sWitches S31a to
the sWitch S31d is in an on state and the outer right audio
S310 is brought into an on state depending on Whether to use
signal RW is supplied to the sWitch S31d.
[0070] SP terminals 34 include the SP terminals 34a to 34].
the Zone2 or Bi-Amp function.
[0066] The sWitch S31d sWitches Whether to output any one
of a surround back right audio signal SBR, an upper right
audio signal RH, and an outer right audio signal RW inputted
from the DSP, to an ampli?er 32b. Speci?cally, by an instruc
tion from the control unit 2, in the DSP, as a channel to be
supplied to the sWitch S31d, any one of the surround back
right audio signal SBR, the upper right audio signal RH, and
the outer right audio signal RW is selected. The sWitch S31e
sWitches Whether to output a Zone2 right audio signal Z2R
When the functions are not used, the same speakers as those
described above are connected to the SP terminals. When the
Zone2 function is used, a Zone2 left speaker SZ2L is con
nected to the surround back left SP terminal 34a and a Zone2
right speaker SZ2R is connected to the surroundback right SP
terminal 34b. When the Bi-Amp function is used, a Bi-Amp
terminal of a left speaker SL is connected to the surround back
left SP terminal 34a and a Bi-Amp terminal of a right speaker
SR is connected to the surround back right SP terminal 34b.
[0071] Next, operations in the present example Will be
inputted from the DSP, to the ampli?er 32b. The sWitch S31]
sWitches Whether to output a right audio signal R (for Bi
Amp) inputted from the DSP, to the ampli?er 32b. Any one of
described.
[0072]
(1) When the Bi-Amp Function is Used
the sWitches S31d to S3 1]is brought into an on state depend
[0073]
The control unit 2 controls the DSP and the sWitches
ing on Whether to use the Zone2 or Bi-Amp function.
to supply the left audio signal L (for Bi-Amp) to the surround
back left SP terminal 34a and supply the right audio signal R
(for Bi-Amp) to the surround back right SP terminal 34b.
[0067] PoWer ampli?ers 32 include the ampli?ers 32a and
32b. The ampli?er 32a ampli?es the surround back left audio
signal SBL, the upper left audio signal LH, the outer left audio
signal LW, the Zone2 left audio signal Z2L, or the left audio
signal L (for Bi-Amp) inputted thereto and supplies the
ampli?ed audio signal to a corresponding one of sWitches
S33a, S330, and S33e. The ampli?er 32b ampli?es the sur
round back right audio signal SBR, the upper right audio
signal RH, the outer right audio signal RW, the Zone2 right
audio signal Z2R, or the right audio signal R (for Bi-Amp)
inputted thereto and supplies the ampli?ed audio signal to a
corresponding one of sWitches S33b, S33d, and S33].
Speci?cally, the control unit 2 causes the DSP to supply the
left audio signal L (for Bi-Amp) to the sWitch S310 and
supply the right audio signal R (for Bi-Amp) to the sWitch
S31]. The control unit 2 controls the sWitches S31c, S31],
S33a, and S331) to be an on state and other sWitches to be an
off state.
[0074] (2) When the Zone2 Function is Used
[0075] The control unit 2 controls the DSP and the sWitches
to supply the Zone2 left audio signal Z2L to the surroundback
left SP terminal 34a and supply the Zone2 right audio signal
Z2R to the surround back right SP terminal 34b. Speci?cally,
[0068] An SP relay 33 includes the sWitches S33a to S33].
The sWitch S33a sWitches Whether to supply the surround
the control unit 2 causes the DSP to supply the Zone2 left
back left audio signal SBL, the Zone2 left audio signal Z2L,
or the left audio signal L (for Bi-Amp) inputted from the
audio signal Z2L to the sWitch S311) and supply the Zone2
right audio signal Z2R to the sWitch S31e. The control unit 2
controls the sWitches S31b, S31e, S33a, and S331) to be an on
ampli?er 32a, to a surround back left SP terminal 34a. The
sWitch S33a is brought into an on state When the sWitch S31a
is in an on state and the surround back left audio signal SBL
is supplied to the sWitch 53111, When the sWitch S311) is in an
on state, or When the sWitch S310 is in an on state. The sWitch
S33c sWitches Whether to supply the upper left audio signal
LH inputted from the ampli?er 32a, to an upper left SP
terminal 340. The sWitch S330 is brought into an on state
When the sWitch S31a is in an on state and the upper left audio
signal LH is supplied to the sWitch S31a. The sWitch S33e
state and other sWitches to be an off state.
[0076]
(3) When a Combination of the Outer Left Audio
Signal LW and the Outer Right Audio Signal RW is Included
[0077] The control unit 2 controls the DSP and the sWitches
to supply the outer left audio signal LW to the outer left SP
terminal 34e and supply the outer right audio signal RW to the
outer right SP terminal 34]. Speci?cally, the control unit 2
causes the DSP to supply the outer left audio signal LW to the
sWitch S31a and supply the outer right audio signal RW to the
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