The CVBS Chinese name is a composite synchronous video broadcast signal or composite video blanking and synchronization.
CVBS is a widely used standard, also known as baseband video or RCA video, is a traditional image data transmission method for National Television Standards Committee (NTSC) television signals that transmits data in analog waveforms. The composite video contains color difference (hue and saturation) and brightness (brightness) information and synchronizes them in the blanking pulse, transmitting with the same signal.
It is a format in which an analog television program (picture) signal is combined with a sound signal and modulated onto a radio frequency carrier. In fast-scanning NTSC TVs, the Very High Frequency (VHF) or Ultra High Frequency (UHF) carrier is the modulation amplitude used by the composite video, which produces a signal that is approximately 6 MHz wide. Some CCTV systems use coaxial cable to transmit composite video at close range. Some DVD players and video tape recorders (VCRs) provide composite video inputs and outputs through a pickup socket, also known as an RCA connector.
In composite video, interference between chromatic aberration and luminance information is unavoidable, especially when the signal is weak. This is why long-distance use of VHF or UHF NTFS TV stations with old whip antennas, "rabbit ears", or outdoor "air" often contain fake or up and down shaking colors. CVBS is an older display mode, more accurately the first generation of video display output (the second generation is S-VIDEO, the third generation is VGA, the fourth generation is DVI, the fifth generation is HDMI).
