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Three Improved Codebook Searching Algorithms for Image Compression Using Vector Quantizer

Abstract In this paper, we propose three improved codebook searching algorithms for vector quantization (VQ). Our improved schemes are based on three fast searching methods proposed by Huang et al., IEEE Transactions on Image Processing, 1(3), 1992, 413–416 and the double test (DT) method proposed by Torres and Huguet, IEEE Transactions on Communications, 42(2|3|4), 1994, 208–210. Compared with three codebook searching schemes proposed by Huang et al. [9], we find our proposed algorithms have better performance in terms of encoding time and distortion computations according to the experimental results.