Video In/Out Block - Samsung DVD-R130 Service Manual

13-4 Video In/out Block

DVD-R130 has the two single CVBS Video input(AV3) and two Scart input from AV1 or AV2.
AV3 Video input is CVBS at the at the Front Panel. AV2 Scart has CVBS & RGB input and CVBS output, AV1
Scart is vice versa at the Rear Panel.
The analog Video signal is selected by the IC201(BU4051 Mux). It is controlled by FIC1 (Front Micom).
TIC1 (Video Decoder) diverges from the 14.318185MHz crystal, then generates ITU-R656 (10bits) and 27MHz
clock.
TIC1 (Video Decoder) does closed caption, copy guard detect processing and A/D conversion of analog Video
signal converted into 11bit Digital Video signal (ITU-R656 Format) is outputted via DIC1 (MPEG2 Decoder &
Encoder with video Encoder) of digital part.
13-4-1 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/Aconversion of 10bit Video signal converted into analog signal is outputted via amplifer of analog part.
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
576i(interlaced Video Output), 576P(progressive Video Output).
DIC1 adopts 10bit D/A converter. DIC1 perform video en-coding as well as copy protection.
MPEG-2
A/V CODEC
(DIC1)
Video
Decoder
(TIC1)
Samsung Electronics
OSD
CVBS
MM1647
(SIC1)
Front Micom
RGB
RF
AV3
CVBS/Y
74HC4051
(IC201)
AV1 (CVBS)
AV2 (CVBS)
OSD_SEL
MM1501
(VIC3)
MM1623
(VIC1)
CVBS
RF Tuner
NJM 2267
(6dB AMP)
Fig. 13-8
Circuit Operating Descriptions
S-Video 1
Video 1
Component
SCART1 (TV)
MM1507
(VIC2)
POST2
SCART2 (EXT)
VPS/Sync
OSD
Detector
RGB
Y/C
CVBS
13-9