With the improvement of network technology and camera chip processing, security monitoring HD video 1080p has been gradually popular, and the monitoring field does even begin 4K HD video, so we used MPEG-2, MPEG-4, H.264 / AVC foundation. It can't meet demand, so H.265 is born, so that compression efficiency is doubled.
H.265 is a new video coding standard established after ITU-T VCEG followed by ITU-T VCEG followed. The H.265 standard surrounds the existing video coding standard H.264, reserves the original technologies, and improves some related technologies. Compared to H.264, the video size encoded by H.265 will decrease approximately 39-44%, in the case of a decrease in code rate, the quality of H.265 encoded video can be approximately even better than H.264. It is essentially better than expected signal-to-noise ratio (PSNR).
Significant improvement in H.265 is not only in the frame compression, not only in the field of inter-frame compression, but also manifested in intra compression. Since the variable size conversion, H.265 has great improvements in block compression, but it also brings some new challenges while increasing compression efficiency.
The H.265 standard is based on H.264, and some techniques are improved, and only the original half bandwidth can play the same quality video. It is clear that the computer, mobile phone, tablet, TV, including our monitoring industry, can save more bandwidth and capacity on the basis of the same video quality when using H.265 encoding.
It should be noted that the camera and storage NVR need to support H.265 simultaneously to achieve a target of halving storage space. If the camera and NVR are supported, one party does not support, the device is generally compatible, the camera and NVR are the same, they can be used normally, but the goal of storage is not implemented.
For most industrial applications, H.265 is a method of resolving transmission bandwidth and reducing storage space. However, in the field of security video surveillance, the application of new products is also limited by many aspects. For example, outdoor remote monitoring projects designed for environmental or forest fire prevention, generally need to establish a special transmission route. In this case, the single route only needs to transmit 1 or several video, it is basically not considered transmission. Bandwidth problem (also possible project acceptance person in charge "is not understanding of the difference or some reason, after all, using H.265 video coding standard does not save transmission bandwidth, the rear end also saves storage space).
In addition, for the general consumers of the project, the general consumers that need to be monitored are, such as a safe city, traffic testing, and bank monitoring such professional users need more stable and reliable systems. Most of them have been using existing technologies. For H.265, they still need a longer verification cycle, after all, the security is the first.
In practical engineering projects, consumers such as SMEs and families, shop users need lower cost installation and operation, so it will be more preferred to adopt new technologies. Based on this reason, the application of H.265 products may first be successful in SME applications and recognized in the consumer market. If H.265 is rapidly mature, its compression efficiency is 50% higher than H.264, which can save 20% investment to ensure higher performance and replacement of network and system construction costs.
A large part of the traditional video surveillance screen is stationary, which means that many of the information in the picture is invalid. These invalid information will still have some bandwidth resources. On the basis of H.265, there is more security enterprises to launch. SMART265's solution, for video more advanced intelligent encoding, automatically interrupted the screen moving portion and the stationary portion, focus on the screen of the moving, thereby reducing the code rate, further reducing the code stream and storage cost than H.265.
H.265 Coding has a significant application advantage, high-quality, high compatible, high quality, low-size rate and low cost, under the market container of these years, will usher in the country and the world Duration.
However, when we were analyzed for the above analysis, it would also be necessary to mention a question that needs attention. In an interview with A & S, the respondents have been mentioned that the H.265 standard patents belong to an international organization, and there may be a patented fee in the future. Xiaobian's news, there are already three international organizations to claim to charge H.265 standards, which will become an obstruction of H.265 technology in the development and application of security enterprises, and require manufacturers to be cautious. , Read full text, original title: H.265 development application analysis
Article Source: [Micro Signal: Asmag001, WeChat public number: Safety Automation] Welcome to add attention! Please indicate the source of the article.
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