Hello, guys!
What's up?
Have you ever heard of SVAC(Surveillance Video and Audio Coding)? Today, I'm going to introduce to you the SVAC(Surveillance Video and Audio Coding) protocol with China's proprietary knowledge.
What is SVAC?
In the security industry, the H.26X international standard is the mainstream in the industry and has its unique advantages. In recent years, SVAC national standards with independent intellectual property rights also provide strong technical support for the construction of comprehensive prevention and control system of urban social security. Due to the special requirements and strategic significance of the industry, the SVAC security audio and video codec standard is born. It improves the security of the system and is conducive to the healthy development of the domestic video surveillance market.
In the surveillance industry, coding standards have been an issue that has been repeatedly discussed. In fact, every step of the way from the birth of SVAC(Surveillance Video and Audio Coding) to its growth, we can feel the industry's attention.
SVAC is a national standard for security surveillance applications. It meets the following needs:
Real-time transmission of video images
The resilience of monitoring environment 24/7
The video and audio information of the scene is highly reductive.
It also solves the problem that video surveillance systems are difficult to interconnect due to different source coding standards. It can be said that this is designed to meet the high security requirements of applications in the security industry and has independent intellectual property rights.
As a video encoding and decoding standard with independent intellectual property rights in China, SVAC is expected by some people in the industry and questioned by others. Why can SVAC compete with the leading international mainstream H.265/264 standards? In terms of algorithms, both mainstream H.264 and M-JPEG are encoding and decoding technologies for professional fields such as broadcast television and mass entertainment. SVAC designs for video surveillance.
What are the advantages of SVAC?
Compared with H.265/264, SVAC has the following irreplaceable advantages:
High security of encryption and authentication: SVAC defines encryption and authentication interfaces and data formats to ensure data security, integrity, and non-repudiation. The password is not encoded into the video information. Authentication data is required when the password is extracted. It not only ensures the uniform format, facilitates interconnection, but also retains sufficient extension flexibility.
Region of interest (ROI) encoding: An image is divided into multiple regions of interest (ROI) and a background area. Real-time video information is ensured in key surveillance areas. The frame rate is high. At the same time, the overhead of the non-interest region is reduced.
Video information embedding: The encoding algorithm is not a simple character superposition. Information such as voice recognition feature parameters, special events, and time can be embedded into the encoding algorithm. Without decoding the video, you can directly call up a video by inputting key information.
Scalable video decoding: Hierarchically encodes video data to meet the bandwidth requirements of different transmission networks and data storage environments. A common encoding program transmits a mainstream and a substream, which occupies a large bandwidth. SVAC transmits only one type of stream. Images information with different resolutions can be obtained by layering the streams.
Are you optimistic about the development of SVAC?
If you have any comments or suggestions, please let us know!
China!
