A novel linear source model and a unified rate control algorithm for H.263/MPEG-2/ MPEG-4

Yong Kwan Kim, Zhihai He, and Sanjit K. Mitra
Department of Electrical and Computer Engineering
University of California, Santa Barbara, CA 93106
{zhihai, mitra} [at] iplab.ece.ucsb.edu


Let Rho be the percentage of zeros among the quantized transform coefficients. We discover that, in any typical video coding systems, there is always a strictly linear relationship between Rho and the actual coding bit rate R. This linearity leads to a novel and unified source model for different types of source data and different coding systems, such as H.263 1, MPEG-2 2, and MPEG-4 3. The proposed linear source model is much simpler, but much more accurate than other source models reported in the literature. Based on this source model, a unified rate control algorithm is proposed for the above three video coding systems. Despite its extreme sim- plicity, the proposed algorithm outperforms other rate control algorithms by providing more accurate and robust rate control.
[PDF] [BibTex]
Zhihai He and Sanjit K. Mitra,
ICASSP 2001, May. 2001.
Node ID: 321 , DB ID: 118 , Lab: IPL , Target: Conference
Subject: [IPL] « Look up more