P1
P0
P2
PIXCLK
DATA
Horizontal
Blanking
Vertical Blanking/
Ancillary Data
Active Field
Luma
Frame
Buffer
Chroma
Frame
Buffer
Vertical Ancillary Data
Buffer
2X Bytes/line
X bytes/line
Active Field
Internal Modules
156
SPRUHI7A – December 2012 – Revised June 2016
Copyright © 2012–2016, Texas Instruments Incorporated
High-Definition Video Processing Subsystem (HDVPSS)
For Progressive source video, the FIELD ID does not change. So, the Vertical Ancillary Data Buffer will
contain all the information beginning from the vertical blanking of the previous frame. This situation is
shown in
.
Figure 1-106. Progressive Frame Vertical Blanking Ancillary Data Storage
1.2.8.2.6 BT.656 Style Embedded Sync
1.2.8.2.6.1 Data Input
Like Discrete Sync Input, Embedded Sync mode takes data from the 24b input bus. Input data can be 8,
16, or 24 bits wide. A sample is retrieved each and every Pixel Clock cycle. There is no valid signal gating
data entry.
shows a valid data sample each Pixel Clock period.
Figure 1-107. Embedded Sync Data Entry
1.2.8.2.6.2 Sync Words
In embedded sync mode, code words are inserted into the stream at pixel clock rates. For external
devices that send out 10 bits (single pixel interface) or 20 bits (parallel Y-Cb/Cr interface) of data, only the
8 (single pixel interface) or 16 (parallel 8bY-8bCb/Cr interface) most significant bits of each pixel are used.