With the continuous development of monitoring technology, the two signals of AHD and CVBS have gradually become well-known concepts. So, what do AHD and CVBS mean? This article will give you a detailed introduction.
1. What is AHD?
AHD is the abbreviation of Analog High Definition. It is a new type of analog high-definition video transmission technology, which can transmit high-definition signals through analog. AHD technology is an emerging analog high-definition video transmission technology. It uses advanced digital signal processing technology and analog modulation technology to convert high-definition video signals into analog signals for transmission, thereby realizing high-definition video transmission and display.
The advantage of AHD technology is that it does not need to replace the original monitoring equipment and wiring, only the camera and DVR need to be replaced. At the same time, AHD technology can realize 1080P high-definition video transmission, and has low delay and high stability, which can meet the needs of various complex monitoring environments.
2. What is CVBS?
CVBS is the abbreviation of Composite Video Baseband Signal, it is an analog video signal, which is the most basic video signal in traditional analog surveillance systems. A CVBS signal is composed of a luminance signal and a chrominance signal, which are mixed together by a signal mixer to form a composite video signal.
The advantage of CVBS technology is that it has wide compatibility and stability, and can be compatible with various monitoring equipment and display equipment. At the same time, CVBS technology is relatively mature, and the cost is low, which is suitable for some low-cost monitoring systems.
3. The difference between AHD and CVBS
1. Different transmission methods
AHD technology adopts analog signal transmission, which can realize 1080P high-definition video transmission. The CVBS technology uses composite video baseband signal transmission, which can only realize standard definition video transmission. Understand AHD and CVBS, what do they mean?
2. The cost is different
Compared with the CVBS technology, the cost of the AHD technology is relatively high. Because AHD technology needs to replace the camera and DVR, and CVBS technology only needs to replace the camera.
3. Different compatibility
Compared with CVBS technology, AHD technology has poor compatibility. Because AHD technology can only be compatible with AHD equipment, and CVBS technology can be compatible with various monitoring equipment and display equipment.
4. Different stability
Compared with CVBS technology, AHD technology has higher stability. Because AHD technology uses advanced digital signal processing technology and analog modulation technology, it can achieve lower delay and higher stability.
Generally speaking, compared with CVBS technology, AHD technology has higher image quality and higher stability, but the cost is higher and the compatibility is poor. The CVBS technology has wide compatibility and stability, low cost, suitable for some low-cost monitoring systems.
Four. Conclusion
Through the introduction of this article, we can understand the basic concepts and differences between the two monitoring signals of AHD and CVBS. When choosing a monitoring system, we should choose the monitoring signal that suits us according to our actual needs and budget.