CTA-861 Optimized Video Timing (OVT) Generator

Version

Input Timing Parameter

Output Timing Parameter

Video Format:

AVI InfoFrame:

RID= FR= M=  VIC=

Additional Info:

Frame Rate Index = , Frame Rate Group =

Show Video Format Timing Diagram

Hide Diagram

CTA-861 Figure 2 - General Progressive Video Format Timing (Positive Sync)

This Figure shows the horizontal and vertical timing diagrams of the Video Timing. The Vfront, Vsync, and Vback values are defined in terms of Video Lines, see CTA-861, Section 2.2. The signals Hsync, Vsync, Data Enable, and Clock are encoded in an interface-specific manner. Please refer to the interface specification for details.

High-definition Video Timings, including all OVT Video Timings, use positive vertical and horizontal sync. Lines are always numbered sequentially from 1 to Vtotal. The Ln value, indicated in the diagrams, provides the line number of the leading-line of vertical sync in field 1 for the Video Timing. In the case of high-definition Video Timings, including OVT, Ln is always 1.

Algorithm Parameter Values

NOTE: Modifying these parameters from their default values will result in non-compliant video timings. Experimental use only! See CTA-861-I, Table 181.

Calculation Steps

Active Formats

EDID

Select Video Resolutions and Frame Rates supported by the Sink Device. Add the VFDB data to the CTA Data Block Collection in a CTA Extension Block of the EDID. Disabled selections are not valid for VFDBs, and have to be indicated by VIC-based SVDs in VDBs. Checked disabled selections indicate implied support, but must be ignored by the Source.