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0xFF
0x00
0x00
Flags
Cb0
Y0
Cr0
Y1
Cb1
Y2
Cr1
Y3
time
Internal Modules
157
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
The key code words are Start of Active Video (SAV) and End of Active Video (EAV). Three flags are found
in these code words: F (field), V (vertical sync), and H (horizontal sync). These flags signify the position in
the frame corresponding to the data immediately following the codeword. The flags determine whether the
code is EAV or SAV and where they lie in the picture. The first byte of the code word is 0xFF. The second
and third bytes are 0x00. The bit ordering of the fourth byte is detailed in
Table 1-55. Fourth Byte of EAV/SAV Code Word
7
(fixed)
6
(F)
5
(V)
4
(H)
3
(P3=V^H)
2
(P2=F^H)
1
(P1=F^V)
0
(P0=F^V^H)
Description
1
0
0
0
0
0
0
0
SAV, Field 0, Active Video
1
0
0
1
1
1
0
1
EAV. Field 0, Horizontal
Blanking
1
0
1
0
1
0
1
1
SAV, Field 0, Vertical
Blanking
1
0
1
1
0
1
1
0
EAV, Field 0, Horizontal
Blanking in Vertical Blanking
Region
1
1
0
0
0
1
1
1
SAV, Field 1, Active Video
1
1
0
1
1
0
1
0
EAV, Field 1, Horizontal
Blanking
1
1
1
0
1
1
0
0
SAV, Field 1, Vertical
Blanking
1
1
1
1
0
0
0
1
EAV, Field 1, Horizontal
Blanking in Vertical Blanking
Region
An example of the input ordering of the embedded code word, followed by active video, is shown in
. The input data mode is 8 bits for the example.
Figure 1-108. Code Word Format Example Followed by Video Data