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A method for decreasing the output bit-rate of video transmission over limited bandwidth in communication networks is proposed in this paper. To increase the efficiency of video transmission, the method based on a concept of zone coding of discrete cosine transform (DCT) coefficients is used in video coding scheme to achieve a lower output bit-rate of encoded video. The experiments are carried out by implementing the proposed method with a low bit-rate video coding standard i.e. H.263. The performance of the coding scheme is measured in term of peak signal to noise ratio (PSNR), output bit-rate and quality of the decoded video sequence. The experimental results show significant improvements in term of output bit-rate. Although the quality of resultant image frames is slightly degraded, it is difficult to notice by the human visual system (HVS), and hence considered being in an acceptable level.
Industrial Technology, 2002. IEEE ICIT '02. 2002 IEEE International Conference on (Volume:2 )
Date of Conference: 11-14 Dec. 2002