An inter-frame coding algorithm based on vector quantization

A kind of low complexity inter-frame coding algorithm based on vector quantization (VQ) is presented in this paper. There are three inter encode modes according to the motion type of the image block. Not-encode mode is adopted by static block, residual mean coding mode is adopted by the smooth motion block, VQ and mean encode mode are adopted by general motion block. The motion type of the image block is determined by the moving threshold TH and smoothing threshold T. The size of each encode block is adjusted adaptively by the size of the static region or smoothing motion region. Simulations show that this algorithm can get great rate distortion performance, especially for the head shoulder sequences with large static and smoothing background. PSNR can be achieved at 35.63 dB, while the compression rate can be achieved at 150.38, and bit rate with frame rate of 10 fps is 50.69 kbps. The quality and bit rate can meet the visual and bandwidth requirements in the application of video telephony communications.