A Board Video Processing - Panasonic LX600 Technical Information

A Board Video Processing

Video processing is performed on the A board. The A board incorporated
in these models is now responsible for signal processing, and system
control operation. The video processing function that had been performed
by the DG board of the previous models is now accomplished on the A
Board by IC4002. This IC is also responsible for selectively switching all
video inputs (Tuner, Component, Composite, S-Video, and HDMI). The
HDMI video is converted to an eight-bit YUV signal by the HDMI IF
receiver (IC5004) before being output to the video selector. IC5002
provides the copyright protection for the incoming HDMI signals. The
ATSC interface (DT board) processes the ATSC, NTSC, and QAM television
signals. The analog NTSC and digital ATSC or QAM signal of the DT board are
output to the A board via the connector DT12/A12. IC4002 is responsible for
processing all video, which includes image resizing, noise reduction, I/P
conversion and Gamma adjustment control. Although selected by a
different IC, the audio processing function is also performed by IC4002.
OSD is also generated by IC4002 and mixed with the video signal before
being output to IC4004. IC4004 is a Field Programmable Gate array
responsible for the pixel conversions and addressing of the Active Matrix
display within the LCD Panel. This IC also contains the low voltage
differential signaling (LVDS) transmitter, used for the conversion of the 8-
bit RGB video into a differential RGB output signal. The LVDS receiver
on the LCD panel (not shown in the drawing) converts the differential
RGB output signal from the A board into an 8-bit RGB signal that is
provided to the LCD Panel.
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