Samsung DVD-905, Service Manual

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Reference Information
2-34 Samsung Electronics
2-7-2 DVD audio output
Fig. 2-56 Audio data and CLK
1. AC-3 5.1 channel
The system CLK generated by AIC14 built-in PLL circuit is provided for A/V decoder and audio D/A converter
and Sync. of each channel is agreed.
DVD audio data outputted from VIC1 A/V decoder are supplied to DATA0 for 2 channels and to DATA0-2 for
5.1 channel. Then, LRCK is outputted by 48KHz or 96KHz.
Front L/R channel is outputted in DATA0, rear L/R channel in DATA1 and center and sub woofer channel in
DATA2. DATA0 data are outputted to front L/R channel after D/A conversion and filtering of
AIC3(PCM1720E).
DATA1 data are ouputted by analog signal of D/A converter of AIC9 and to rear L/R via HPF after filtering.
DATA2 data are converted into analog signal by D/A converter of AIC14 and to rear L/R via HPF after filtering
and a channel is outputted by center signal via post filter nad HPF.
The other channel of AIC14 is outputted by subwoofer signal through amplifier of +4.5dB and LPF.
2. Bass redirection(2 Channel down mixing)
If only 2 speakers are used in spite of output to 5.1 channel, center/rear and subwoofer signal may be down
mixed in 2 channel L/R.
If there is a subwoofer speaker, it is outputted directly to subwoofer without down mixing.
VIC1
(LC6120P)
A/V DECODER
KIC3
(PCM1710U)
AIC9
(PCM1720E)
AIC3
(PCM1720E)
AIC
(PCM1723E)
27MHz Master CLK
DATA0
LRCK
BCK
DATA1
DATA2
System clock synchronized with
PLL
PLL built-in
D/A converter