DocumentCode :
1700516
Title :
A New Rate Adaptive Control Algorithm for JPEG2000
Author :
Li Qi-hu ; Zhang Yan-yan ; Ren Guo-qiang ; Wu Qin-zhang ; Han Wen-jun
Author_Institution :
Inst. of Opt. & Electron., Chinese Acad. of Sci., Chengdu, China
fYear :
2010
Firstpage :
23
Lastpage :
27
Abstract :
In this paper, a new rate adaptive control algorithm is proposed based on study of JPEG2000 rate control algorithm, in order to reduce the amount of bits sent to the arithmetic coder, without any significant changes into the standard architecture and without loosing performance. After wavelet transform, the coefficient is modeled as Gaussian distribution, but remove the offspring of the lowest frequency. Each block bit rate of the actual encoding has been achieved based on rate-distortion theory in the overall rate certain, and the bit rate should be real-time deadline in the entropy coding. The offspring of the lowest frequency has been code at without distortion. This algorithm achieve bit rate deadline in real-time, reducing the encoder computation and memory usage. Experimental results show that after the removal of the most low frequencies, the remaining band coefficient modeled as a Gaussian distribution, the image compression is significantly better than results that the whole band is the Gaussian distribution, when the compression rate is not too high. And rate allocation algorithm is accurate and low complex, and that it is most suitable for hardware implementation.
Keywords :
Gaussian distribution; image coding; wavelet transforms; Gaussian distribution; JPEG2000; actual encoding; arithmetic coder; encoder computation; memory usage; new rate adaptive control algorithm; rate distortion theory; standard architecture; wavelet transform; Algorithm design and analysis; Image coding; Rate-distortion; Resource management; Signal processing algorithms; Transform coding; Wavelet transforms; DWT; bit rate allocation; rate control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multimedia Information Networking and Security (MINES), 2010 International Conference on
Conference_Location :
Nanjing, Jiangsu
Print_ISBN :
978-1-4244-8626-7
Electronic_ISBN :
978-0-7695-4258-4
Type :
conf
DOI :
10.1109/MINES.2010.12
Filename :
5670910
Link To Document :
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