Title :
Robust image and video coding with pyramid vector quantisation
Author :
Chung-How, J.T.H. ; Bull, D.R.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
Abstract :
Most current image and video coding standards use variable length codes to achieve compression, which renders the compressed bitstream very sensitive to channel errors. In this paper, image and video coders based on Pyramid Vector Quantisation (PVQ) and using only fixed length codes are proposed. Still image coders using PVQ in conjunction with DCT and wavelet techniques are described and their robustness to random channel errors are investigated. This work is then extended to video coding. A novel fixed rate motion compensated wavelet/PVQ video coder suitable for low bit-rate applications and generating only fixed length codewords is presented. Its compression performance and robustness to random bit errors is compared with H.263
Keywords :
coding errors; discrete cosine transforms; image coding; motion compensation; vector quantisation; video coding; wavelet transforms; DCT; compression performance; fixed length codes; fixed rate motion compensated video coder; low bit-rate applications; pyramid VQ; pyramid vector quantisation; random bit errors; random channel errors; robust image coding; robust video coding; still image coders; wavelet techniques; Application software; Decoding; Discrete cosine transforms; Image coding; Robustness; Transform coding; Vector quantization; Video coding; Video compression; Wireless networks;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780009
