Video Output - Toshiba D-VR3SU Service Manual

7-5 Video Output

7-5-1 Outline
DIC1 (MPEG2 Decoder & Encoder with video Encoder) diverges from the 13.5MHz crystal, then generates
VSYNC and HSYNC.
DIC1 (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
DIC1
7-5-2 NTSC/PAL Digital
DIC1 inputted from pin E1 with 13.5MHz generates HSYNC and VSYNC which are based on video signal. DIC1
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 Front switch.
DIC1 adopts 10bit D/A converter.
DIC1 perform video en-coding as well as copy protection.
CVBS
Y
C
Y
Cb
Cr
IC601
VCR
Main Micom
Fig. 7-9
Circuit Operating Descriptions
6dB
LOW
AMP
PASS
&
FILTER
75ohm
(6MHz)
Drive
LA73054
VIC1
Video TACT S/W
:Progressive/Interlacing
SELECTING
Analog
Mux
CVBS
SV1274
Y
C
Y
Cb
Cr
7-11