Videos Signal Processing; Audio Signal Processing; Vdc Device Operation Concept - BenQ MP611 Product Service Manual

3.3 Videos Signal Processing

Video and S-Video input: The Video and S-video signal will be fed to a Video Decoder (VDC) device built on main
board. The video decoder accepts NTSC/PAL/SECAM composite and s-video inputs. The output is formatted as YCrCb
and routed to the DDP2000.
The VDC device is the key component of video signal processing. It is an integrated device that consists of A/D
interface, Sync processing, Luma/Chroma decoding and processing, and Digital output interface. Please see Figure 9.
Video
S-Video
Component

3.4 Audio Signal Processing

The PC Audio signal input to source board. There is an audio amplifier built on it. It supplies the mute control and
volume control. The output audio power is 2 watts.
Luma/Chroma
A/D
decoding
processing
Figure 9 VDC device operation concept
Sync
138
Digital
Digital YUV 16
output
bits output
interface