Keywords : Backward Channel Compression
European Journal of Molecular & Clinical Medicine,
2020, Volume 7, Issue 2, Pages 3258-3263
Video surveillance is an important tool to enhance public safety and privacy protection. It is used to
analyze video content and to monitor the activity required to effectively transmit and store surveillance video
data. Video compression techniques can be used to reduce or resize video. A less sophisticated encoding method
based on the Weiner-Civ coding principle can be used for surveillance video compression, and the backwardchannel-
aware Weiner-Civ video coding approach is applied to improve coding efficiency. Encoder Motion
vectors obtained from the decoder are sent back to the encoder via the feedback channel for object detection and
event analysis. Encoder and decoder use different motion vectors in motion compensation for the same frame.
Rebuilt frames on the encoder and decoder therefore lose synchronization, which causes a drift problem and
propagates to the rest of the range. To address the reliability of credible broadcasts, an error replacement plan
has been proposed for BCAWZ for reliable transmission on the back-channel, which is essential for direct and
reliable object identification, event analysis and video data quality. Watermarking is also applied to securely
transmit surveillance video stream.