12
M
t8
58
0
COXIAL
INPUT
DSP
ADSP
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Section Three Audio processing circuit
3.3.1 Block diagram of audio signal is shown in figure 3.3.1.1:
Decoding
chip
D/A
converter
Figure 3.3.1.1 Block diagram of audio signal
DATA_LF_RF_MTK
DATA_LS_RS_MTK
BCLK_MTK
LRCK_MTK
DATA_C_SW_MTK
DATA_LSB_RSB_MTK
DATA_LDOWNMIX_RD
OWNMIX_MTK
SLRCK_DSP
SBCLK_DSP
SDATA,_L_RDOWNMIX_ DSP
SDATA_LSB_RSB_DSP
SDATA_C_SW_DSP
SDATA_LS_RS_DSP
SDATA_LF_RF_DSP
MCLK_MTK
U
6
74
LC
X
H
16
22
44
M
T
D
SBCLK_DAC
SLRCK_DAC
SDATA_LF_RF_DAC
SDATA_LS_RS_DAC
SDATA_C_SW_DAC
SDATA_LSB_RSB_DAC
SDATA_LDOWNMIX_RDOWNMIX_DAC
U17/U20/
U23/U23/
U26
Wm8740
DAC1~DAC5_MCLK
Output
Amplifier
A
ud
io o
ut
pu
t t
er
m
in
al
Audio
processing
board
U18
U19
U21
U22
U24
U25
U27
U28
U30
U31
LEFT_DOWNMIX
RIGHT_DOWNMIX
LEFT_FRONT
RIGHT_FRONT
CENTER
SW
LS
RS
SBL
SBR
COXIAL
OPTICAL
U33
88DE2755
H
D
M
I1
HD
HDMI2_TX2-
HD
HDMI2_TX1-
HD
HDMI2_TX0-
HD
HDMI2_TXC-
SPDIF_OUT
HDMI2
TX2+/TX2-/TX1+/TX1-/TX0+/TX0-/TXC+/TXC-
AO2SI2S_BCK
AO2SI2S_LRCK
AO2SI2SD0(MLR)
AO2SI2SD1(SURLR)
AO2SI2SD2(CSW)
AO2SI2SD3(SURBLR)
SPDIF2
OPTICAL_IN_ARC_MVL
OPTICAL
INPUT
COAXIAL_IN
OPTICAL_IN
ARC_MVL_OPTICAL_IN
COAXIAL/OPTICAL
INPUT BOARD
U4
SN74CBT3257
COAXIAL_IN
USBDAC_CIAXIAL_IN
OPTICAL_IN_ARC_
MVL_OPTICAL_IN
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