Chapter 1 - Features and Circuit Descriptions
CTV-41 10
Video Processing
An overall block diagram of the video process circuits is illustrated in Figure
1-5 for the S series models and in Figure 1-6 for the 32”XBR 40” D3000
models. Processing of the video is the same except for the additional
HDMI input available via the U2 board and frame doubling on the BH
board.
New Trident Processor
IC4500 has been designed to handle many of the tasks once done by
separate components. It has eliminated a separate CCP processor, HDMI
Micro, DRC and Wega Engine. It is capable of handling video resolutions
from 480i all the way up to 1080p (via the HDMI inputs only). All signals
exit Trident as 720p 60FPS.
Video Switching
Only composite and Y/C signals are switched by IC4800. Component,
HDMI, and PC inputs are routed directly to Trident IC4500 where they are
selected internally. Only video input 1 accepts a Y/C signal source.
Digital Tuner
If a digital tuner source is selected, the signal is sent directly to the ATI
Micro IC7300 where the signal will be demodulated and decoded to
extract the audio and video information. The video digital stream is then
sent to Trident video processor IC4500 and audio data is input to Audio
DSP IC2002 (not shown).
HDMI Inputs
Note the lack of an HDMI Microprocessor. This is now integrated within
the Trident processor IC4500. HDMI sources pass through HDMI EQ
IC550 for impedance matching and into IC4500 for processing of the
audio and video information. IC5501 and IC5502 contain the Enhanced
Display Information Data (EDID) to provide display capability information
to the device connected to the input. In the XBR model an additional EDID
IC250 (not shown) is located on the U2 board.
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