Texas Instruments DM38x DaVinci, User Manual

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4-Way Muxed
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Internal Modules
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162 SPRUHI7A – December 2012 – Revised June 2016
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High-Definition Video Processing Subsystem (HDVPSS)
1.2.8.2.7.3 4-Way Multiplexing
For 4-Way Multiplexing, four embedded sync streams are multiplexed into one as seen in Figure 1-112 .
Again, the sync codeword is in all four sources. Like 2-Way Multiplexing, the sizes of the four camera
sources are the same and the sizes of the Vertical Ancillary Data regions are the same. The four streams
are not necessarily sending the same pixel site in adjacent clock cycles.
Figure 1-112. Example of 4-Way Multiplexing
1.2.8.2.7.4 Line Multiplexing
In Line Multiplexing, n-different sources are sent into the VIP a complete line at a time using a modified
version of embedded sync. An example of Line Multiplexing for two sources is shown in
Figure 1-113 .
Figure 1-113. Example of Line Multiplexing
The width and height of each source in Line Multiplexed data can be different. For instance, one source
can be PAL while another one can be NTSC. A line is comprised of YUV422 pixels in repeating patterns
of CbYCrY.