- Basic Characteristics
- Composite video carries single channel 405, 525 or 625 line interlaced signal
- Uses yellow RCA connector with separate audio connectors
- Also known as CVBS or SD video
- Combines video information with synchronization pulses
- Technical Details
- Color signal combines luminance (Y) and chrominance (C) subcarriers
- Frequency separation uses harmonics of horizontal scanning rate
- Colorburst signal added to horizontal blanking interval
- Three main variants: NTSC, PAL, and SECAM
- Artifacts and Solutions
- Dot crawl artifact occurs due to intermodulation of chrominance and luminance
- Comb filters used to separate signals
- S-Video and component video avoid this problem
- Modern Usage
- Digital sampling possible since 1980s
- Still used in CCTV systems and fpv drones
- Modern TVs use digital tuners, not analog
- Can be converted to FM RF for modern devices
- RF conversion introduces additional noise and interference