Title :
New bit-rate control models for image and video transmission
Author :
Canhui Cai ; Ding, Runfao ; Mitra, Sanjit K.
Author_Institution :
Sch. of Electron. Inf. Eng., Tianjin Univ., China
fDate :
29 June-1 July 2002
Abstract :
This paper presents two new schemes of bit rate control: a linear significant coefficient percentage model and a mixed power function model of step-size. Based on the rate-distortion characteristics of wavelet images, the relationship between the percentage of significant coefficients and the output bit-rate is examined, and a linear model is developed. Next, a mixed power function model is introduced as the regression of experimental results. Both bit rate control algorithms have been implemented for the X-tree wavelet coder. Simulation results have verified the effectiveness of the new bit-rate control models.
Keywords :
image coding; rate distortion theory; transform coding; video coding; wavelet transforms; X-tree wavelet coder; bit rate control; image coding; image transmission; linear model; linear significant coefficient percentage model; mixed power function model; rate-distortion characteristics; video transmission; wavelets; Bit rate; Computational complexity; Decoding; Image coding; Image communication; Laplace equations; Power engineering and energy; Power engineering computing; Rate-distortion; Streaming media;
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
DOI :
10.1109/ICCCAS.2002.1178947
