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Adaptive hierarchical vector quantization for image coding |
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| Authors: | Sheng Zhong Qing-yun Shi Min-Teh Cheng |
| Affiliation: | a Department of Mathematics, Peking University, Beijing 100871, People's Republic of China b The Center of Information Science, Peking University, Beijing, 100871, People's Republic of China c The National Laboratory of Machine Perception, Peking University, Beijing 100871, People's Republic of China |
| Abstract: | In this paper an adaptive hierarchical algorithm of vector quantization for image coding is proposed. First the basic codebook is generated adaptively, then the codes are coded into higher-level codes by creating an index codebook using the redundance presented in the codes. This hierarchical scheme lowers the bit rate significantly and causes little more computation and no more distortion than the single-layer adaptive VQ algorithm does which is used to create the basic codebook. |
| Keywords: | Adaptive VQ Index map Index-codebook |
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