Vizio GV46L HDTV Service Manual page 50

Data Input and Conversion
Mode Control Logic
The mode control logic determines if the decrypted data is video, audio or auxiliary
information, and directs it to the appropriate logic block.
Video Data Conversion and Video Output
The SiI 9011 can output video in many different formats (see examples in Table 2). The
receiver can also process the video data before it is output, as shown in Figure 5. Each of the
processing blocks may be bypassed by setting the appropriate register bits. (See page 38 for
a more detailed path diagram.)
Figure 8-16 HDMI Video Processing Path
Color Range Scaling
The color range depends on the video format, according to the CEA-861B specification. In
some applications the 8-bit input range uses the entire span of 0x00 (0) to 0xFF (255) values.
In other applications the range is scaled narrower. The receiver cannot detect the incoming
video data range, and there is no required range specification in the HDMI AVI packet.
Therefore the receiver's firmware will have to program the scaling depending on the detected
video format. Refer to the SiI 9011 Programmer's Reference (SiI-PR-0006) for more details.
When the receiver outputs embedded syncs (SAV/EAV codes), it also limits the YCbCr output
values to 1 to 254.
Figure 8-17 Digital Video Output Formats
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