Title :
Very low bit-rate color video coding using adaptive subband vector quantization with dynamic bit allocation
Author :
Voukelatos, Stathis P. ; Soraghan, John J.
Author_Institution :
Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK
fDate :
4/1/1997 12:00:00 AM
Abstract :
A novel adaptive vector quantization (VQ) based subband coding scheme for very low bit rate coding of video sequences is presented. Overlapped block motion estimation/compensation is employed to exploit interframe redundancy. A two-dimensional (2-D) wavelet transform (WT) is applied to the resulting displaced frame difference (DFD) signal. The WT coefficients are encoded using an adaptive subband vector quantization (ASBVQ) scheme in combination with a dynamic bit allocation strategy based on marginal analysis. Fixed rate coding is provided. Comparative experimental results of the ASBVQ codec with the H.261 and the H.263 video coding standards are given
Keywords :
adaptive signal processing; image colour analysis; image sequences; motion compensation; motion estimation; transform coding; vector quantisation; video codecs; video coding; wavelet transforms; 2D wavelet transform; ASBVQ codec; H.261 video coding standard; H.263 video coding standard; VQ; adaptive subband vector quantization; displaced frame difference signal; dynamic bit allocation; experimental results; fixed rate coding; interframe redundancy; marginal analysis; overlapped block motion estimation/compensation; subband coding; very low bit-rate color video coding; video codec; video sequences; wavelet transform coefficients; Bit rate; Code standards; Codecs; Design for disassembly; Motion estimation; Two dimensional displays; Vector quantization; Video coding; Video sequences; Wavelet transforms;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
