TC32LX85 Signal Circuit Block Diagram
TC32LX85 Signal Circuit Block Diagram
72
The main function of the A board is to select and process incoming video signals. The HDMI receiver located
inside IC4003 converts the HDMI signal into YUV data. Analog signals such as; Video inputs, component video Input,
composite video output of the tuner are all connected to IC4003 for selection. The selected analog signal enters the A/D
converter circuit for conversion into YUV data. An internal switch of IC4003 selects the desired signal and outputs to the
PEAKS LITE IC, IC8001.
Digital television reception of the tuner is output in the form of a transport stream (CHODATA). The transport
stream enters the DTV decoder section of IC8001 where the video signal is extracted and converted to YUV data. The JPEG
data of the GS board enters the SD/IF section of IC8001 for conversion into YUV data. The internal video selector of IC8001
(not shown in the diagram) selects and outputs the desired picture data to the Video Process circuit.
The Video Process section of the IC8001 performs all picture control operations such as brightness, contrast,
color, tint, etc. On Screen Display data such as channel numbers, Digital TV closed caption, and picture adjustments are
mixed with the video data. The RGB output of the video process section of the IC undergoes conversion to a LVDS signal
before being output to the LCD panel for display.
To Next Page
Loading...
