Title :
Achieving optimal rate-distortion performance in arbitrarily-shaped transform coding
Author :
Shen, Guobin ; Zeng, Bing ; Liou, Ming L.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, Hong Kong
Abstract :
In this paper, we present a simple but effective method to enhance the coding performance of shape-adaptive DCT (SA-DCT). By choosing the first processing direction (between horizontal and vertical) within each boundary block for doing the 1D transform, the proposed method guarantees to achieve optimal rate-distortion results and actually outperforms the existing SA-DCT algorithms significantly. The proposed method is also applicable to arbitrarily-shaped coding based on some padding techniques
Keywords :
discrete cosine transforms; rate distortion theory; transform coding; video coding; 1D transform; arbitrarily-shaped transform coding; boundary block; coding performance; optimal rate-distortion performance; padding techniques; processing direction; shape-adaptive DCT; Approximation algorithms; Bit rate; Computational complexity; Councils; Discrete cosine transforms; MPEG 4 Standard; Rate-distortion; Telecommunication computing; Transform coding; Virtual manufacturing;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856244
