Title :
Rate-distortion based optimization for zerotree entropy wavelet coding
Author :
Hung-Ju Lee ; Tihao Chiang ; Ya-Qin Zhang
Author_Institution :
Sarnoff Corp., Princeton, NJ
fDate :
8/1/1999 12:00:00 AM
Abstract :
We present a rate-distortion (R-D) based bit allocation scheme for MPEG-4 zerotree entropy based wavelet coding, specifically, the multiscale zerotree entropy coding mode (MQ) of the MPEG-4 visual texture coding tool. With an iterative quadratic R-D model, our algorithm achieves accurate target bit rate and better image quality with fast convergence
Keywords :
code standards; entropy codes; image coding; image texture; iterative methods; optimisation; rate distortion theory; telecommunication standards; transform coding; trees (mathematics); wavelet transforms; MPEG-4; algorithm; bit allocation; entropy wavelet coding; fast convergence; image coding; image quality; iterative quadratic R-D model; multiscale zerotree entropy coding; rate control algorithm; rate-distortion based optimization; visual texture coding tool; Bit rate; Entropy coding; Image coding; Image quality; MPEG 4 Standard; Quantization; Rate-distortion; Scalability; Video coding; Wavelet coefficients;
Journal_Title :
Consumer Electronics, IEEE Transactions on
