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3 April 1997 Very low bit rate compression for one-to-N video broadcast
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Compression of video for low bitrate communication is studied in this paper. Use of vector quantization in the H.263 framework is proposed. A variable rate residual vector quantizer with a transform vector quantizer in the first stage is used along with a strategy to adapt the bit-rate to the activity in the block. This ability to adapt the bit- rate is very important for very low bitrate compression. The proposed multistage quantizer combined with an adaptive arithmetic codec produced very good results. The variability in the bit-rate was achieved by using smaller block sizes in the later stages of quantizer along with selective quantization of only high energy blocks at the later stages. Performance comparison of the proposed codec with that of H- 263 indicates that there is superior compression results especially bitrates less than 8kb/s.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Heesung Kwon, Mahesh Venkatraman, and Nasser M. Nasrabadi "Very low bit rate compression for one-to-N video broadcast", Proc. SPIE 3078, Wavelet Applications IV, (3 April 1997);

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