面向高清视频存储的无编解码快速降帧压缩方法  

Fast frame reduction compression method without codec for high definition video storage

作　　者：童剑军 TONG Jianjun(iFLYTEK Company Limited,Hefei Anhui 230031,China)

机构地区：[1]科大讯飞股份有限公司,合肥230031

出　　处：《计算机应用》2023年第S02期176-181,共6页journal of Computer Applications

摘　　要：针对当前大规模高清(HD)视频监控系统存在的存储成本过高,只能设置7~30 d的历史视频存储时长,导致监控系统历史视频使用价值低的问题,提出一种面向高清视频存储的无编解码快速降帧压缩方法,名为“A-Jump”。首先,将准备进行前向参考编码的P帧分组分层;然后,定义了不同P帧所参考编码的特定前续P帧位置;最后,通过“定位-删除-重组合”的手段实现视频的快速降帧,规避了计算量非常大的“解码-抽帧-重编码”过程。数据对比分析表明,所提方法的“快速降帧存储方案”相较于全帧率存储方案,可以在相同的存储时长情况下节省70%的视频存储空间,在相同的存储空间情况下视频存储时长可达原来的329%;相较于“超级压缩方案”,在运算服务器方面仅需要27%的投入成本;相较于其他基于“解码-抽帧-重编码”方式的“降帧存储方案”,在运算服务器方面投入成本仅占23.5%。实验结果表明,所提方法可以低成本地节省历史视频存储空间,增加视频存储时长,提升监控系统使用价值。In response to the high storage cost of current large-scale High Definition(HD)video monitoring systems,which can only set a 7 to 30 d storage time for historical videos,resulting in low usage value of historical videos in the monitoring system,a fast frame reduction compression method without codec,named“A-Jump”,was proposed for HD video storage.Firstly,the P frames prepared for forward reference encoding were grouped and layered,Secondly,specific preceding P frame positions were defined for the reference encoding of different P frames.Finally,rapid video frame reduction was achieved through the method of“localization-deletion-recombination”,avoiding the computationally intensive process of“decoding-frame extraction-recoding”.After comparing and analyzing the implementation data,the“fast frame reduction storage solution”in the proposed method,can save 70% of video storage space compared to the full frame rate storage scheme under the same storage duration.Under the same storage space,the video storage duration can reach 329% of the original in this solution;compared to the“super compression solution”,in terms of computing servers,only 27% of the investment cost is required in this solution;compared to other“frame reduction storage solutions”based on the“decoding-frame extraction-recoding”method,the investment cost in computing servers only accounts for 23.5% in this solution.Experimental results show that the proposed method can effectively save historical video storage space at low cost,increase video storage duration,and enhance the value of monitoring systems.

关 键 词：高清视频监控系统 存储 无编解码 降帧 压缩 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]