Title :
Accurate rate control method in transcoding
Author :
Chen, L. ; Cheng, L.J. ; Yu, S.Y.
Author_Institution :
Inst. of Image Commun. & Inf. Process., Shanghai Jiao Tong Univ., China
Abstract :
An accurate rate control method for transcoding is presented. A linear relationship between the number of bits generated from the quantised discrete cosine transform (DCT) coefficients and the number of nonzero DCT coefficients is used in this method. By estimating variation of average values of run-level codes at different bit rates, errors of model parameters are corrected. Good results compared to TM5 are reported.
Keywords :
discrete cosine transforms; quantisation (signal); transform coding; video coding; MPEG-2 video; accurate rate control method; average values variation; compressed bitstream scaling; linear relationship; model parameters; nonzero numbers; number of bits generated; quantisation parameters; quantised discrete cosine transform coefficients; run-level codes; transcoding;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040026
