摘要：

Describes how the space-frequency quantization (SFQ)-based image coder can be construed as a simplified attempt to design a global entropy-constrained vector quantizer (ECVQ). Summary of SFQ algorithm and SFQ-based coder; Two features of ECVQ; Empirical statistical study of the distribution of the coefficients of a typical high-frequency wavelet band; Discussion of the relationship between the high-level entropy-constrained framework and empirical studies.

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