Title :
Algorithm for JPEG2000 rate control based on number of coding passes
Author :
Zhang, Facun ; Wang, Qiankun ; Duan, Jinghong
Author_Institution :
Sch. of Comput. Sci. & Eng., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
Post-compression rate-distortion optimization (PCRD-opt) algorithm in JPEG2000 needs to calculate rate-distortion slope of every truncation point, and increases the cost of computation and storage as well. A new algorithm is proposed for JPEG2000 rate control, which truncates the code stream by the number of coding passes and needn´t to calculate rate distortion slope. Compared with the standard post-compression rate-distortion optimization algorithm, experimental results show that the proposed algorithm reduces the total encoding time with negligible loss in power signal-to-noise ratio (PSNR).
Keywords :
data compression; image coding; optimisation; rate distortion theory; JPEG2000 rate control algorithm; PCRD-opt algorithm; PSNR; code stream truncation; coding pass number; post-compression rate-distortion optimization algorithm; power signal-to-noise ratio; rate-distortion slope calculation; truncation point; Algorithm design and analysis; Bit rate; Encoding; Image coding; Image quality; Rate-distortion; Transform coding; Coding Pass; JPEG2000; Rate Control; Rate-distortion Slope;
Conference_Titel :
Multimedia Technology (ICMT), 2011 International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-61284-771-9
DOI :
10.1109/ICMT.2011.6001816
