Compression and Transmission of Video Stream over Mesh Network

Abstract

The article is devoted to the tasks of video compression and video transmission for surveillance system by means or effective decreasing of redundancy. The conception of codec is a combination of layered representation and differential pulse-code modulation. The layers, from which each frame of decoded video is composed, are alpha channel, background estimation, image with difference between intensities of objects and background estimation, correcting image. Layen are compressed with WebP. The result of test on real videos shows that proposed codec outperforms MPEG4 and H.264 in the desired range of values of compression factor. The reliable transmission of video over long distance is a complex task, which was solved by the use of mesh network.

Keywords

• video compression
• video transmission
• WebP
• H.264
• MPEG4
• mesh network
• radio modem
• routing
• link quality