4.1. Full-Raster Frame Structure
For sync-timing systems you can have:
- Hsync – horizontal synchronization pulse
- Vsync – vertical synchronization pulse
For blank-timing systems you can have:
- Hblank – horizontal blanking interval
- Vblank – vertical blanking interval
Several video technical organizations, such as the Video Electronics Standard Association (VESA), and the Consumer Electronics Association (CEA), define full-raster video timing parameters. For example, the selected video standard (e.g., SMPTE 424, CEA-861-D and VESA) or custom timing parameters programmed in the host interface define the width and timing of the Hsync, Hblank, Vsync and Vblank signals. The full-raster protocol adheres to the industry norm.
Usually, the active video data is geometrically in between the horizontal and vertical blanking areas. Both vertical and horizontal blanking areas are in four distinctive groups:
- Front porch
- Sync pulse
- Back porch
- Active video
The figures superimpose full-raster streams on top of a video frame raster, The figures show where the IP injects full raster timing information (FRn), ancillary (An) data (Pn) and active video data into the payload of the TDATA bus.
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