The scalar quantization discussed in Chap. 2 quantizes the samples of a source signal one by one in sequence. It is simple because it deals with only one sample each time, but it can only achieve so much for quantization efficiency. We now consider quantizing two or more samples as one block each time and call this approach vector quantization (VQ).
KeywordsVector Quantization Quantization Error Decision Boundary Decision Region Voronoi Region
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- 19.Gersho, A., Gray, R.M.: Vector Quantization and Signal Compression, first edn. Springer, New York (1991)Google Scholar