关键词: 高清视频监控系统, 存储, 无编解码, 降帧, 压缩

Abstract:

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.

Key words: high definition video monitoring system, storage, codec-free, frame reduction, compression