Title :
A rate control scheme for three-dimensional wavelet-based video coders
Author :
Lizhi Zhang ; Tao Wang ; Huadong Sun ; Long Yang ; Jinzhao Ma ; Lei Zhou
Author_Institution :
Sch. of Comput. & Inf. Eng., Harbin Univ. of Commerce, Harbin, China
Abstract :
The rate control problem for scalable wavelet video coding system based on motion compensated temporal filtering (MCTF) has been studied in this paper, we first investigate and verify the rate-distortion (RD) function for the temporal frames, and estimate the coding efficiency parameters. Optimal rate allocation among the frames in the group is then examined based on the Lagrangian optimization method, and a rate control strategy related to the variance and coding efficiency parameter of the temporal frames has been presented, the algorithm and its complexity is suitable for video applications. Experiments show that compared with the fixed rate allocation, the proposed rate control strategy can obviously improve the average PSNR.
Keywords :
motion compensation; video coding; Lagrangian optimization; average PSNR; fixed rate allocation; motion compensated temporal filtering; rate control scheme; rate distortion function; three dimensional wavelet based video coders; Discrete wavelet transforms; Encoding; Filtering; Optical fibers; PSNR; Resource management; Video coding; Discrete Wavelet Transform (DWT); MCTF; rate allocation; rate-distortion function; scalable coding;
Conference_Titel :
Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on
Conference_Location :
Harbin, Heilongjiang, China
Print_ISBN :
978-1-61284-087-1
DOI :
10.1109/EMEIT.2011.6023589
