SDTV RGB Interface
Some SDTV consumer video equipment supports an analog R′G′B′ video interface. NTSC and PAL VBI data may be present on 480i or 576i R′G′B′ video signals. Three separate RCA phono connectors (consumer market) or BNC connectors (pro-video and PC market) are used.
The horizontal and vertical video timing are dependent on the video standard, as discussed in Chapter 3. For sources, the video signal at the connector should have a source impedance of 75 Ω±5%. For receivers, video inputs should be AC-coupled and have a 75 Ω±5% input impedance. The three signals must be coincident with respect to each other within ±5 ns.
Sync information may be present on just the green channel, all three channels, as a separate composite sync signal, ...