Title :
A simplified algorithm of JPEG2000 rate control for VLSI implementation
Author :
Xing, Qin ; Xiaolang, Yan ; Haitong, Ge ; Ye, Yang
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou, China
Abstract :
It is an effective speedup technology in JPEG2000 VLSI implementation to integrate the rate control with tier-1 encoding. For VLSI implementation, a simplified rate-distortion optimization rate control algorithm is proposed. The algorithm includes component bit allocation based on weights, a simplified delta-distortion estimation model, and two-table optimal slope threshold generation. Compared with the existing one, the algorithm has some merits: it is code-block memory access free, has less memory requirement and lower computation complexity, with about 0.3dB decrease of image quality.
Keywords :
VLSI; code standards; image coding; optimisation; rate distortion theory; JPEG2000 rate control; VLSI implementation; code-block memory access; component bit allocation; computation complexity; delta-distortion estimation model; memory requirement; rate-distortion optimization; speedup technology; tier-1 encoding; two-table optimal slope threshold generation; Arithmetic; Bit rate; Context modeling; Image coding; Image quality; Partitioning algorithms; Rate distortion theory; Rate-distortion; Transform coding; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1466085
