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New Bit Reduction of Vector Quantization Using Block Prediction and Relative Addressing

100%

Hu Y.-C. , Tsai P. , Lo C.-C.

2008

tom Vol. 87, nr 3-4

313-329

A low bit rate image coding scheme based on vector quantization is proposed. In this scheme, the block prediction coding and the relative addressing techniques are employed to cut down the required bit rate of vector quantization. In block prediction coding, neighboring encoded blocks are taken to compress the current block if a high degree of similarity between them is existed. In the relative addressing technique, the redundancy among neighboring indices are exploited to reduce the bit rate. From the results, it is shown that the proposed scheme significantly reduces the bit rate of VQ while keeping good image quality of compressed images.