DocumentCode :
1656471
Title :
Coding directional angles using context-based adaptive arithmetic code
Author :
Hui, Chiu Wai ; Siu, Wan-chi
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong
fYear :
2008
Firstpage :
1190
Lastpage :
1193
Abstract :
When the quadtree-based segmentation technique is used for adaptive directional lifting-based (ADL) wavelet transform, the direction information usually consists of a segmentation quadtree map and prediction error of the directional angles. In an adaptive directional lifting-based wavelet transform, the prediction error is coded by the arithmetic coding. In this paper we modify the ADL scheme and propose a new directional angle coding scheme which uses the CABAC algorithm to code the prediction error by taking the direction information into account. Experimental results show that performance of the ADL is improved up to 0.13 dB.
Keywords :
adaptive codes; arithmetic codes; image coding; image segmentation; quadtrees; transform coding; wavelet transforms; ADL; CABAC algorithm; adaptive directional lifting-based wavelet transform; context-based adaptive arithmetic code; directional angle coding scheme; error prediction; image coding; image segmentation; quadtree-based segmentation technique; Arithmetic; Decoding; Discrete transforms; Discrete wavelet transforms; Image reconstruction; Kernel; Pixel; Video coding; Wavelet coefficients; Wavelet transforms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
Type :
conf
DOI :
10.1109/ICOSP.2008.4697343
Filename :
4697343
Link To Document :
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