What is the difference between CVBS, AHD, HD CVI, HDTVI connections?
HD CCTV is a new open standard for trait HD digital video over coaxial cable. HD CCTV doesn’t require changing the existing coaxial cable infrastructure and it is an only a matter of replacing the camera and a security camera recorder. Camius TRiVault series security camera recorders support not only regular CVBS analog cameras but AHD, HDCVI and HDTVI types.
- CVBS stands for "Composite Video Blanking and Sync”. It is a conventional analog signal delivered through an analog BNC connector. It also can be delivered through an RCA connector or other types (older cameras sometimes used a PL-259 connector). CVBS signal can support max. 960H video resolution. 960H represents the number of horizontal pixels in a video signal transmitted from a camera or received by a security camera recorder DVR (Digital Video Recorder). 960H represent 960 x 576 (PAL) or 960 x 480 (NTSC) pixels, you can compare it with the lower D1 resolution providing 720 x 576 pixels (PAL), or 720 x 480 pixels (NTSC).
- AHD stands for “Analog High Definition” and means an analog closed-circuit television video surveillance standard that uses a coax cable to transmit HD 720P and 1080P video from a security camera to a security camera recorder DVR (Digital Video Recorder).
- HD-TVI means “High DefinitionTransport Video Interface”, it is an Analog CCTV standard transmitted over coax supporting HD 720P to 3MP Video signal in real-time. HDTVI can support long distance video transmission reaching up to 500 meters.
- HD-CVI (High Definition Composite Video Interface), an analog transmission standard based over-coaxial-cable delivering two HD video formats: 1920H or called otherwise Full HD 1080P (1920×1080) & 1280H or called otherwise 720P (1280×720) through progressive scanning.