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13-5 Video Output
13-5-1 Outline
U1 (MPEG2 Decoder & Encoder with video Encoder) diverges from the 50MHz crystal, then generates
VSYNC and HSYNC.
U1 (MPEG2 Decoder & Encoder with video Encoder) does RGB encoding, copy guard processing and D/A
conversion of 10bit Video signal converted into analog signal is outputted via amplifer of analog part.
A/V CODEC
U1
13-5-2 NTSC/PAL Digital
U1 inputted from pin E1 with 50MHz generates HSYNC and VSYNC which are based on video signal. U1
is synchronous signals with decoded video signal.
The above signals, which are CVBS (Composite Video Burst Synchronized), Y(S_Video), C(S_Video),
Y(Component)/G(Green), Cr(component)/R(Red), Cb(component)/B(Blue), are selectively outputted 480i
(interlaced Video Output), 480P(progressive Video Output) by the Pront button U1 adopts 10bit D/A converter.
U1 perform video en-coding as well as copy protection.
Samsung Electronics
CVBS
Y
C
Y
Cb
Cr
Front
Micom
IC601
Fig. 13-8
Circuit Operating Descriptions
6dB
LOW
AMP
PASS
&
FILTER
75ohm
(6MHz)
Drive
MM1623
VIC1
CVBS
Y
C
Y
Cb
Cr
PSO
13-11
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