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7-6 Video
7-6-1 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.
Video signal converted into analog signal is outputted via amplifier of analog part.
(Main Board)
ZIC1
(Vaddis-5E)
MPEG Decoder
& CPU
7-6-2 NTSC/PAL Digital Encoder (VADDIS 5E ; 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 of ITU-
R601 format.
The separate signal is encoded to NTSC/PAL.
The above signals, which are CVBS (Composite Video Burst Synchronized), Y(S_VIDEO)/R(RED), C(S_VIDEO)/
B(BLUE) and G(GREEN) 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
SCIC3
(MM1501)
CVBS
Y/R
C/B
G
DVD_L/R
DVD_Y
DVD_CVBS
FIC1
Front Micom
GMS81C2020
Fig. 7-19 Video Output Block Diagram
(Jack Board)
R/C
VIC1
6dB AMP
CVBS
TV_L/R
SCIC1
(MM1647)
SCL
SDL
Circuit Operating Descriptions
CVBS
Yout
Cout
SCJ1 (TV)
TV RGB/C
CVBS/Y
A L/R
Video Select
S/W
7-15
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