Title :
Joint spatial frequency quantization of zerotree wavelet video coding
Author :
Wu, Z.Y. ; Wong, W.C.
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
This paper proposes joint spatial-frequency quantization for a zerotree wavelet video encoder. Following temporal redundancy reduction via block motion estimation, the displaced frame difference signal is discrete wavelet transformed, zerotree encoded and optimally quantized. Improved performance is obtained compared to H.263 and systems nor employing joint quantization, while at the same time preserving spatial and frequency scalability.
Keywords :
discrete wavelet transforms; vector quantisation; video coding; block motion estimation; displaced frame difference signal; frequency scalability; joint spatial frequency quantization; spatial scalability; temporal redundancy reduction; zerotree wavelet video coding; zerotree wavelet video encoder; Bit rate; Design for disassembly; Discrete cosine transforms; Discrete wavelet transforms; Frequency; MPEG 4 Standard; Quantization; Scalability; Video coding; Wavelet coefficients;
Conference_Titel :
Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-5467-2
DOI :
10.1109/ICIP.1999.822902
