Title :
Hybrid DCT/wavelet I-frame coding for efficient H.263+ rate control at low bit rates
Author :
Song, Hwangjun ; Ifim, J. ; Kuo, C. C Jay
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
fDate :
31 May-3 Jun 1998
Abstract :
At low bit rates, the bit budget for I-frame coding in H.263+ can be too high to be practical. A hybrid DCT/wavelet transform based I-frame coding is proposed in this work as a solution to the rate control problem. This new coder is compatible with the H.263+ bit stream syntax, and aims at an R-D optimized performance with a reasonable amount of computational complexity. By employing fast estimation of the coding efficiency with a rate-distortion model and performing an R-D based rate allocation, the hybrid coding scheme achieves higher coding gain at low bit rates
Keywords :
computational complexity; data compression; discrete cosine transforms; video coding; wavelet transforms; H.263+ rate control; R-D optimized performance; bit budget; bit rates; coding efficiency; coding gain; computational complexity; hybrid DCT/wavelet I-frame coding; rate allocation; Bit rate; Computational complexity; Discrete cosine transforms; Image coding; Performance gain; Rate-distortion; Robustness; Video compression; Visual communication; Wavelet transforms;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.698818
