SHENZHEN JIAXINJIE TECHNOLOGY CO.,LTD

Related tags: HDCVI, AHD, HDTVI, HD-SDI, ccHDtv, 960H solution

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Compare and contrast between solutions
HDCVI, HDTVI, and AHD share one thing in common: as opposed to 960H that uses the CCD sensor, HDCVI, HDTVI, and AHD use the megapixel-level CMOS or Exmor CMOS sensor. The purpose is to capture HD images at the source level. Among manufacturers of CMOS sensors are Sony, Omnivision, Pixelplus, and BYD. The formation of images differs slightly according to brand.

Another similarity as far as components are concerned is the use of an image signal processor (ISP) in conjunction with the sensor. This device ultimately determines the final image displayed by HDCVI, HDTVI, and AHD solutions. The chipset could be integrated into the sensor module or into the transceiver at the backend of the HDCVI, HDTVI, or AHD camera. Image signal processors, whose manufacturers include Sony, Fullhan, Nextchip, and Eyenix, process and enhance images formed by the sensor. As ISPs of different companies are designed differently, they have different ways of handling backlight compensation, WDR noise reduction, and the 3As, namely auto white balance, auto exposure, and auto focus.

One final thing that the solutions have in common is the presence of a signal transceiver, which produces different signal formats based on the technology in question, namely HDCVI, HDTVI, and AHD. Regardless of the technology, these transceivers are similar in that they combine signal augmentation, voltage augmentation, and MCU all in one device and emit signals over different transmission distances. There is also a circuit switch that allows cameras to switch between HD-over-coaxial and CVBS output.

All HD-over-coaxial signals travel through coaxial cables, which can be 5C-2V (RG-59U) or 3C-2V (RG-6) for transmission of between 300 and 500 meters. Among the things that set them apart are the codec engine, which is made by TI, Hisilicon, or Grain Media, and the performance of ISP processing.

Application in verticals
Based on how things look right now, to popularize HDCVI, HDTVI, and AHD and widen their reach in different verticals, it seems manufacturers still have lots of publicity and marketing to do. In fact, I still have doubts over their market acceptance beyond the banking, financial, and retail verticals, as 960H and HD-SDI themselves are still mostly deployed in retail, banking, and education. It is my hope that fiber optic providers can develop and commercialize HD-over-coaxial interfaces, so that HDCVI, HDTVI, and AHD can go beyond small and medium implementations and find their way into city and highway surveillance, which requires HD and real-time video transmission.

Currently, there aren't any credible or authoritative figures on the market acceptance toward HDCVI, HDTVI and AHD. Yet, marketing strategies differ according to manufacturers and their OEM partners. Based on our observation, a lack of understanding of the different solutions is the biggest obstacle that manufacturers need to deal with right now.

Opportunities and future development
HD and intelligence are future development trends that analog players seeking to upgrade their HD products future, advances in CMOS, ISP, and transceivers will cause HD-over-coaxial surveillance to become a norm. Applications in different verticals will also become more noticeable. In security, there is a notion that IP will replace analog. But this will not happen anytime soon, and HD-over-coaxial marks the effort by analog players to at least slow the IP invasion and analog's decline. In the end, maybe there is a purpose for the existence of these solutions.

Shenzhen Jiaxinjie Technology Co., Ltd is developing 720P HD CVI, CVR, 720P / 1080 P AHD, AHD DVR. For more details, please send inquiry to : info@szjxj.com or skype: jxjcctv