Surveillance industry: the development of HD road
Due to its relatively simple installation method and affordable price, the current market share of the analog surveillance system is about 70%. However, with the continuous advancement of IP network surveillance, its market share and sales are steadily losing ground. If you use high-definition network cameras to upgrade the original analog system, most of the equipment in the old system will need to be replaced, which not only consumes manpower and material resources, but more importantly, greatly increases the cost of project construction, making high-definition a luxury. In response to this situation, SLOC, HDCVI has appeared one after another. href="http://www.xldcctv.com" target="_blank">AHD and other high-definition upgrade solutions for the transition from analog to network high-definition. These three high-definition solutions all use coaxial cables as the transmission medium. In addition to promoting the development of high-definition, it also reflects the manufacturers' concern for the "sustainable development" of coaxial cables in the analog standard-definition era.
SLOC(SecurityLinkoverCoax)Coaxial cable composite video transmission technology
SLOCis a partnership between Sony Corporation and the American semiconductor manufacturer "Insel Corporation" (IntersilTechwell) technology developed through cooperation.2011year4monthOn June 6, Sony announced that it is developing the industry's first hybrid camera globally through a coaxial cable with the US semiconductor manufacturer Insel. Based on the mixed transmission of analog signals and digital signalsSLOCThe technical solution is based on SLOCTechnical camera modemPHYChipTW3801(2013has been used in TW3802) and one based on SLOC's receiver modemPHYChipTW3811 style="font-family:'Times New Roman';">). style="font-family:'Times New Roman';"
It can be seen that SLOC is a complete transmission solution developed by Intersil for video cable transmission in surveillance systems. This solution complies with the development trend of high-definition and intelligent video surveillance, and integrates analog and digital signal hybrid transmission methods, retaining the real-time nature of analog video transmission and other advantages. SLOCCombined with IntersilThe traditional advantages in video signal processing and digital-analog mixed signal processing are currently able to ensure analog signals and IPIP at a distance of 600 meters. style="font-family:宋体;">Reliable signal transmission greatly extends the distance of traditional network cable or coaxial cable transmissionIPsignal or analog signal;SLOCSupportIPsignals, allowing users to obtain high-definition encoded network transmission images while getting the real-time advantages of analog signals, and withIPtwo-way communication(uplink and downlink dual channels)SLOCcan integrate the camera'sPTZcontrol and guaranteeIPThe signal travels unimpeded on the coaxial line .
SLOC provides a brand new video transmission solution to various manufacturers. Since its inception, it has received support at home and abroad. But later in the security ecosystem, it failed to launch a series of products, and its promotion and application did not seem to be successful.
HDCVI（HighDefinitionCompositeVideoInterface) High Definition Composite Video Interface Technology
HDCVI technology is similar to SLOC technology, a high-definition video transmission technology based on coaxial cables. It uses baseband modulation and quadrature amplitude modulation technology to modulate the video into a coaxial million high-definition electrical signal for transmission; based on existing 75-3Video coaxial cables with specifications of style="font-family:'Times New Roman';">and above are used as transmission media and can achieve long-distance transmission at low cost. This technology successfully solves the problem of chrominance crosstalk by completely separating the luminance and chrominance signals. In addition, HDCVI has obvious advantages in intelligent control and real-time performance, especially in terms of upgrade cost control, because it follows the application of analog monitoring technology and simple construction deployment, saving a lot of manpower, material resources, and financial resources.
In order to successfully promote HDCVITechnology, Dahua has launched front-end to back-end products and complete supporting solutions to fully meet the actual needs of users.HDCVIHDCVITechnology, as a patented technology of Zhejiang Dahua, has passed42014201433Day, InternationalHDcctvThe alliance approved a new generation standard for high-definition surveillance video in Sydney, AustraliaHDcctv2.0ATBased on DahuaHDCVIATAT style="font-family:宋体;">New standard products are widely used in the upgrading of traditional analog products, new digital high-definition solutions, and new high-definition high-definition markets.
AHDAnalog HD
In order to be better compatible with the original simulation system and reduce the problems faced by our customers in engineering use. Ruidun International (Hong Kong) Co., Ltd. fully launched HDCVI in 2013 Roman';">2014AHD analog high-definition series products were fully launched in 2014. AHD was born to solve the HD-SDI disadvantages of conflicting transmission distance and resolution in products.
AHDMain performance advantages:
1, AHDThe high-definition camera module is based on the original ordinary75-3Coaxial-like cable is the transmission medium for transmission up to 500meters;
2, realizing the ability to carry 720P/1080P resolution video;
3, the front-end data is not encoded and compressed to the back-end, full real-time, high fidelity;
4, which uses advanced Y/C signal separation and analog filtering technology, which can effectively reduce color noise in high-frequency areas and achieve better image restoration.
Since the attenuation of analog signals in long-distance transmission is inevitable, advanced signal separation technology is used to amplify high-frequency signals. But another problem is that when transmitting at different distances, the degree of signal attenuation is also different, and the signal cannot be accurately amplified. However, based on the current processing technology, it does not affect ordinary applications. AHDThe new product is suitable not only for places with high visual surveillance requirements such as road traffic, schools, and banks, but also for general surveillance places such as supermarkets and homes.AHDWith its strong practicality and cost-effectiveness, the product will become a major competitor in high-definition solutions.
Summary
High-definition is currently one of the most mentioned concerns in the security industry, and high-definition is also an inevitable trend in the surveillance industry. However, there are many roads to high-definition surveillance. In addition to the 3 analog surveillance upgrade solutions introduced in this article, there are alsoHD-SDIDigital high-definition and network high-definition surveillance. When looking at the issue of high-definition video surveillance, users cannot blindly pursue it. They must take into account both current and long-term development and choose a solution that suits them.
Shenzhen Xinlaida Security Technology Co., Ltd. is a professional R&D and production enterprise of high-definition surveillance products. The company operates: Network HD Camera, AHD, Digital Matrix and its comprehensive management platform are deeply recognized by customers.
This article comes from: Xldcctv www.xldcctv.com