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从2011年公安部科信局和原信产部共同明确了安全防范监控数字视音频编解码标准(即SVAC标准)应由SAC/TC100归口,并要求正式强制执行。发展至今,在“十三五规划”中更明确要求一类监控点及二类监控点要求SVAC监控做到全覆盖。而在二类监控点中最重要的环节就是镇、村级的监控覆盖。此类监控点不同与城市监控,往往夜间的公共照明设施并不完备,这就需要星光级的监控设备来进行部署。同时镇、村级在网络带宽建设上资源较城市缺乏,而SVAC编码标准中的可伸缩编码技术可在不影响监控
From 2011, the Ministry of Public Security Bureau of Science and Information and the Ministry of Information Industry and Industry jointly clarified that the safety precaution monitoring digital video and audio codec standard (ie SVAC standard) should be centralized by SAC / TC100 and require formal enforcement. In the “13th Five-Year Plan”, more and more requirements for a type of monitoring points and two kinds of monitoring points are required to achieve full coverage of SVAC monitoring. In the second type of monitoring point is the most important part of the town, village-level monitoring coverage. Such monitoring points vary with the city monitoring, often at night, public lighting facilities are not complete, which requires star-level monitoring equipment to be deployed. At the same time, towns and villages have a shortage of resources in cities for network bandwidth construction. However, scalable coding techniques in SVAC coding standards can be implemented without affecting the monitoring