13-16 DVD Video
(1) Outline
U1(A/V decoder with video encoder) diverges from the 27MHz crystal, then generates VSYNC and HSYNC. U1
does RGB encoding,copy guard processing and D/A Conversion of 8bit Video data internally inputted from video
decoder block by Micro Process block.
Video signal converted into analog signal is outputted via amplifier of analog part.
A/V Decoder
Vibratto2 With
Video Encoder
ZIC1
Front
Micom
FIC1
LA73054
6dB
AMP
&
75ohm
Drive
LOW
PASS
FILTER
(6MHz)
Y
C
Y
Pb
Pr
To
VCR
MAIN
Board
(SCART
JACK)
VIC2
MM1503
(Switch)
R
B
G
CVBS
User Key Toggle
(Front Pannel)
User Selection
(OSD)
Interace/Progressive
Selection for Component Out
SCART/Component
Switch Control
CVBS
C
Y(C)
Pb(B)
Pr(R)
SCART Out
Componnet Out
S-V
ideo Out
Fig. 13-45
Video output Block diagram
(2) NTSC/PAL Digital Encoder (VADDIS 5E ; Bult in video encoder)
U1 inputted form pin2 with 27MHz generates HSYNC and VSYNC which are based on video signal. U1 is syn-
chronous signals with decoded video signal and control the output timing of 8bit video signal of ITU-R601 for-
mat. The separate signal is encoded to NTSC/PAL by control of IC601.
The above signals, which are CVBS(Composite Video Burst Synchronized)/G(Green)/Y[PIN139],Y(S-
Video)/B(Blue)/Pb[PIN145] and C(S-Video)/R(RED)/Pr[PIN151], are selectively ouputted CVBS + S-Video,
RGB/Component by User Control.
In Course of encoding, 8bit data can be extended to 10bit of more. To convert the extended data, U1 adopts 10bit
D/A converter. U1 perform video encoding as well as copy protection.
(3) Video Amplifier (VIC1: LA73054)
VIC1 is 6dB amplifier. Base on CVBS signal, the final output level must be 2Vpp without 75ohm therminal resis-
tance. Because the level of video encoder ouput is only 1.1Vpp, the level is adjusted with the special amplifier.
When mute port of pin 5 is active"High", the ouput siganl is "Muted". CVBS, Y(G) C, B(Pr), B(Pb) ouputted from
vidoe encoder are inputted to pin 2,8,6,16,14 of VIC1. Amplified signals by +6dB are ouputted via ouput termi-
anls(RCA, S-Video,SCART)with 75ohm Resistance(VR2~VR11)
Circuit Operating Descriptions
13-49
Samsung Electronics
Summary of Contents for DVD-V5450
Page 23: ...Reference Information 14 12 Samsung Electronics Fig 14 14 Mecha Timing Chart Kaiser II ...
Page 37: ...Reference Information 14 26 Samsung Electronics MEMO ...
Page 49: ...Product Specification 2 12 Samsung Electronics MEMO ...
Page 109: ...Operating Instructions 12 60 Samsung Electronics MEMO ...
Page 237: ...Troubleshooting 5 34 Samsung Electronics MEMO ...
Page 247: ...Exploded View and Parts List 6 10 Samsung Electronics MEMO ...
Page 263: ...Block Diagram 8 2 MEMO Samsung Electronics ...
Page 265: ...PCB Diagrams 10 2 Samsung Electronics 10 1 VCR Main PCB COMPONENT SIDE ...
Page 266: ...PCB Diagrams 10 3 Samsung Electronics CONDUCTOR SIDE ...
Page 267: ...PCB Diagrams 10 4 Samsung Electronics 10 2 DVD Main PCB COMPONENT SIDE ...
Page 268: ...PCB Diagrams 10 5 Samsung Electronics CONDUCTOR SIDE ...
Page 270: ...9 1 9 Wiring Diagram Samsung Electronics ...
Page 271: ...Wiring Diagram 9 2 MEMO Samsung Electronics ...