SVAC Promotes China's Security to International Standards

In May this year, the GB/T 25724-2010 National Standard for Security and Surveillance Digital Video Audio Coding (SVAC), approved by the National Standardization Administration Committee, was formally implemented, which solved the long-standing difficulties of unification of standards and protocols in the field of digital surveillance. . China is a big country for security products. SVAC standards not only affect the domestic market, but are more likely to qualify as international standards. What innovation does it have in the end? How will it affect the security industry?

In response to this, as one of the initiators of the SVAC standard, Zhang Yundong, senior vice president and chief technology officer of Zhongxing Electronics, said that the previous video and audio codec standards are mainly aimed at media and mass entertainment, and are difficult to directly apply to security monitoring areas such as on-site Poor reduction, poor compression efficiency and quality, lack of support for intelligent analysis and machine identification, lack of dedicated monitoring information, insufficient protection for the authenticity, integrity, and security of audio and video content...

In response to the problem, Zhongxing Electronics proposed the SVAC standard formulation idea: taking the “high fidelity video and audio codec faithful to the scene” as the core idea, in the process of encoding and decoding, as far as possible, the information of the monitoring site should be kept as true and complete, so as to avoid loss of information. , To realize the high-fidelity restoration of monitoring live video and audio content and guarantee follow-up work.

Under the premise of ensuring the quality of video and audio, SVAC provides higher coding efficiency; the technical architecture is suitable for a variety of video and audio monitoring applications from simple to complex and guarantees the scalability of the standard; on the premise of equal performance, specific algorithms are preferred to have Domestic independent intellectual property rights program to avoid foreign patent traps.

Zhang Yundong pointed out that there are eight major technological innovations in the SVAC standard, one is the improvement of the accuracy of video data, and the other is the use of intra-frame 4×4 prediction and transformation, context-adaptive binary arithmetic coding (CABAC) and other technologies, resulting in higher image quality and coding efficiency; The third is to support variable quality coding; the fourth is to support scalable video coding; the fifth is dual-core audio coding; and the sixth is to support voice recognition feature parameter coding to avoid coding distortion affecting voice recognition and voiceprint recognition; seven is to support monitoring of dedicated information and video and audio The code stream is encoded together; the eighth is to support encryption and authentication.

As China is a major producer of security products, the National Standards Committee has in 2010 guided the establishment of a special “International Standards Promotion Group”, striving to recommend the SVAC standard with independent intellectual property as an international standard with international influence, and to upgrade China’s security companies. The competitiveness and influence.

Zhang Yundong emphasized that the SVAC standard was formally implemented in May 2011 with far-reaching implications. In Shanghai, the SVAC standard has been written into the standard of high-definition cameras. In the future, it may become a basic requirement for bids for various projects. Actively participating manufacturers are bound to “run ahead”.

As the top promoter of the SVAC standard, Zhongxing Electronics was jointly funded by Tianjin Economic and Technological Development Zone State-owned Assets Management Company and Beijing Zhongxing Microelectronics Co., Ltd., and was established in 2008. It is one of the few companies in the domestic security industry that possess both core technology and overall program supply capabilities. One of them is the main bearer of SVAC technology, and is responsible for the implementation of the 28nm chip core algorithm, package, and practical application for security applications.

It is reported that China Star Electronics has taken the lead in realizing the commercialization and commercialization of the SVAC standard to form a set of SD/HD, all-digital, and full-series monitoring solutions based on the SVAC standard, including: HD network cameras capable of supporting up to 1080P resolution. High-definition SDI interface network encoder supports SD network encoders with D1 resolution.