TY - JOUR
T1 - A model-based rate allocation mechanism for wavelet-based embedded image and video coding
AU - Yu, Ya Hui
AU - Tsai, Chun-Jen
PY - 2005
Y1 - 2005
N2 - In wavelet-based embedded coding for still images and/or videos, a trade-off between scalability and coding efficiency is achieved via layered-packetization of the embedded bitstreams optimized for several target operating bitrate points. This process is called rate allocation (tier-2 coding). The typical rate allocation mechanism is formulated as a rate-distortion optimization problem and a simple searching method with slow convergence rate is used. In this paper, a highly efficient model-based rate allocation mechanism is proposed. The algorithm is base on the adaptive analysis of the relationship between rate and distortion of the image/video data. Experiments conducted on a scalable video codec show that the time to obtain the optimal solution is greatly reduced. The techniques can be applied to various wavelet-based embedded image and video coding schemes, such as JPEG2000 and scalable video coding.
AB - In wavelet-based embedded coding for still images and/or videos, a trade-off between scalability and coding efficiency is achieved via layered-packetization of the embedded bitstreams optimized for several target operating bitrate points. This process is called rate allocation (tier-2 coding). The typical rate allocation mechanism is formulated as a rate-distortion optimization problem and a simple searching method with slow convergence rate is used. In this paper, a highly efficient model-based rate allocation mechanism is proposed. The algorithm is base on the adaptive analysis of the relationship between rate and distortion of the image/video data. Experiments conducted on a scalable video codec show that the time to obtain the optimal solution is greatly reduced. The techniques can be applied to various wavelet-based embedded image and video coding schemes, such as JPEG2000 and scalable video coding.
UR - http://www.scopus.com/inward/record.url?scp=67649105722&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2005.1466023
DO - 10.1109/ISCAS.2005.1466023
M3 - Conference article
AN - SCOPUS:67649105722
SN - 0271-4310
SP - 6066
EP - 6069
JO - Proceedings - IEEE International Symposium on Circuits and Systems
JF - Proceedings - IEEE International Symposium on Circuits and Systems
M1 - 1466023
T2 - IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005
Y2 - 23 May 2005 through 26 May 2005
ER -