 - Composite video, also called baseband video or RCA video, is the analog
waveform that conveys the image data in a conventional National
Television Standards Committee (NTSC) television signal. Composite video contains chrominance (hue and saturation) and luminance (brightness) information, along with synchronization and blanking pulses, all together in a single signal.
In fast-scan NTSC television, a very high frequency (VHF) or ultra high frequency (UHF) carrier wave is amplitude-modulated by composite video. This produces a signal approximately 6 MHz wide. Some closed-circuit television
systems transmit composite video for short distances over coaxial cables.
Some DVD players and video cassette recorders (VCRs)
accommodate composite video input or output through a phono jack, also known
as an RCA connector.
In composite video, interference between the chrominance and luminance
information is inevitable, and tends to be worst when the signal is weak.
This is why a distant NTSC television station at VHF or UHF, received with
an old-fashioned whip antenna, "rabbit ears," or outdoor
"aerial" often contains false or fluctuating colors.
Compare S-Video.
| LAST UPDATED: |
20 Jan 2004
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