HDCVI That is, the high-definition composite video interface is a high-definition video transmission standard based on a coaxial cable, and adopts an analog modulation technology to transmit progressively scanned high-definition video. Such as the Sony HD movement FCB-EH6300.
The HDCVI HD composite video interface standard has completely independent intellectual property rights. Its first draft version 0.50 was published on July 31, 2012 by Zhejiang Dahua Technology Co., Ltd., and the latest version is currently at version 1.00, which was already on November 15, 2012. Officially released. [1] HDCVI technical specifications include two high-definition video formats, 1280H and 1920H (1280x720 in 1280H format; 1920x1080 in 1920H format), and analog modulation using uncompressed video data with proprietary intellectual property rights. The technology uses point-to-point transmission of megapixel high-definition video over coaxial cable to achieve video transmission with no delay, low loss and high reliability.
HDCVI technology adopts self-adaptive technology with independent intellectual property rights to ensure that the coaxial cable with the size of 75-3 and above transmits at least 500 meters of high-quality high-definition video, breaking the transmission limit of the existing transmission technology of high-definition video. In addition, HDCVI technology also possesses a number of proprietary intellectual property technologies, including synchronous audio signal transmission technology and real-time two-way data communication technology. [2]2 Key Features Editing the breakthrough innovation and practical technical features of HDCVI HD video transmission technology, it gives a huge value space and industry application fit in the field of analog video surveillance in the high-definition era. It is a real HD that meets the needs of the security industry. Video transmission technology represents the development direction of the industry and will also help create new standards for the security industry.
This is also Dahua’s introduction of the industry’s first embedded DVR in 2001. It once again brings new breakthroughs and innovations in the field of security video surveillance. The popularity of this technology will certainly enable the security industry to take off again and create new business development history. milestone. DaHua will fully demonstrate the series of DVR products and high-definition camera products applying this technology at the 2012 Beijing Expo.
The basic parameters support two resolutions of 1280×720 and 1920×1080, four frame rates of 25, 30, 50, and 60. 1280H/25f, 1280H/30f, 1280H/50f, 280H/60f, 1920H/25f, 1920H/30f Six HD formats.
The proportion of video images meets the 16:9 standard.
Using analog video transmission technology.
Use progressive scan, frame-by-frame transmission mode.
Use coaxial cable as the transmission medium.
Audio coaxial transmission is supported. The transmission direction is sent from the camera side to the receiving device side.
The highest supported audio sample rate is 44.1kHz. (1280H/25f supports up to 32KHz sampling rate.)
Support bidirectional bidirectional data communication, can send the control signal such as PTZ rotation, zoom control to the collection end through the receiving end.
The supported baud rate is 2400/4800/9600. (The forward transmission supports 2400/4800/9600, and the reverse transmission supports 2400/4800.)
Automatic correction compensates for signal distortion in different transmission channels.
Technical advantages Edit coaxial transmission of real high-definition video, such as: Sony HD 30 times movement FCB-EH6500
Coaxial cable transmission, including 1280H and 1920H video formats, corresponds to 1280×720 and 1920×1080 resolutions, achieving the effective resolution of 720P and 1080P HD video standards.
With the new analog modulation technology, there is no CVBS chroma crosstalk in the transmitted high-definition video images.
Long-distance reliable transmission When using 75-3 coaxial cable, 1280H can guarantee the reliable transmission of 500 meters high-quality high-definition video signal.
When using 75-3 coaxial cable, 1920H can guarantee the reliable transmission of 300 meters high-quality high-definition video signal.
With a 75-5 or higher specification, the 1280H ensures reliable transmission of 650 meters of high-quality high-definition video signal.
With the 75-5 or higher specification, the 1920H guarantees reliable transmission of 400-meter high-quality HD video signals.
Non-delay, high-quality transmission technology uses point-to-point transmission, which is a high-definition video transmission technology with no delay, high efficiency, and high picture quality.
The encoding and decoding process and the resulting loss of picture quality are avoided.
When the composite video signal is transmitted in high-definition video signals, the composite audio signal and the bi-directional data transmission signal are synchronized, and a variety of signals are transmitted in a common cable.
The methods and methods for convenient construction and deployment and low system cost along the analog SD transmission can reduce the complexity of construction and deployment, reduce the cost and maintenance complexity of auxiliary materials, and technical requirements for construction personnel.
The old system can be upgraded in high-definition without changing the original line.
You can avoid the 100-meter transmission limit that comes with the HD-SDI HD solution and the IPC HD solution.
Anti-jamming capability can avoid high-frequency electromagnetic radiation in space and have high anti-interference ability.
In the strong interference environment, it can guarantee the transmission and display of high-definition video without loss of lock or frame dropping.
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