what are the types of video signals
A color analog video signal contains information about luminance (Y) and chrominance (C). When combined into one channel, it is called composite video. Composite, formerly the most common type of video signal in consumer-level video equipment, is typically delivered over a single cable with a yellow RCA-type connector.
The color difference channels are so named because they are derived from RGB by subtracting signals from the luma channel for each of the color channels (for example, R-Y or B-Y). S-Video (Y/C): An S-Video signal is also considered a component video signal because the luma and chroma signals are separate. However, the C signal is derived by combining the CB and CR component signals, which reduces the quality of the color channel compared to Yâ²CBCR.