Video - Samsung DVD-P360/CDM Service Manual

Circuit Operating Descriptions

13-4 Video

13-4-1 Outline
ZIC1(A/V decoder with video encoder) diverges from the 27MHz crystal, then generates VSYNC and HSYNC.
ZIC1(A/V decoder with video encoder) does RGB encoding, copy guard processing and D/A conversion of 8bit
video data internally inputted from video decoder block by ZIC1.
Video signal converted into analog signal is outputted via amplifier of analog part.
Fig. 13-13 Video Output Block Diagram
13-4-2 NTSC/PAL Digital Encoder (VADDIS 882 ; Built in video encode)
ZIC1 inputted from pin 161 with 27MHz generates HSYNC and VSYNC which are based on video signal.
ZIC1 is synchronous signals with decoded video signal and control the output timing of 8bit video signal.
The separate signal is encoded to NTSC by control of ZIC1.
The above signals, which are CVBS (Composite Video Burst Synchronized)/G (GREEN)/Y,
Y (S_VIDEO)/R (RED)/Pr and C (S_VIDEO)/B (BLUE)/Pb [PIN162], are selectively outputted CVBS +S_VIDEO,
RGB/Component by the rear switch. In Course of encoding, 8bit data can extend to 10bit or more.
To convert the extended data to quantization noise as possible, ZIC1 adopts 10bit D/A converter.
ZIC1 perform video en-coding as well as copy protection.
Samsung Electronics 13-9