Vector quantization and signal compression
Vector quantization and signal compression
A fast LBG codebook training algorithm for vector quantization
IEEE Transactions on Consumer Electronics
IEEE Transactions on Image Processing
A fast search algorithm for vector quantization using L2-norm pyramid of codewords
IEEE Transactions on Image Processing
An efficient encoding algorithm for vector quantization based on subvector technique
IEEE Transactions on Image Processing
A comparison of several vector quantization codebook generation approaches
IEEE Transactions on Image Processing
Fast VQ encoding by an efficient kick-out condition
IEEE Transactions on Circuits and Systems for Video Technology
An adaptive image authentication scheme for vector quantization compressed image
Journal of Visual Communication and Image Representation
A fast VQ codebook search with initialization and search order
Information Sciences: an International Journal
Engineering Applications of Artificial Intelligence
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In this paper, a fast codebook search algorithm that is equivalent to the full search algorithm for image vector quantization is proposed. The image encoding procedure of VQ needs to find the closest codewords in the codebook for image blocks. A great deal of computational cost is consumed in the image encoding procedure. The proposed algorithm employs two test conditions to speedup the image encoding procedure without incurring any extra image distortion. According to the results, an average 95.23% reduction of execution time can be achieved when the codebook of 256 codewords is used in the proposed algorithm.