Subband Coding
Abstract
In this chapter, we present the second of three approaches to compression in which the source output is decomposed into constituent parts. Each constituent part is encoded using one or more of the methods that have been described previously. The approach described in this chapter, known as subband coding, relies on separating the source output into different bands of frequencies using digital filters. We provide a general description of the subband coding system and, for those readers with some knowledge of Z-transforms, a more mathematical analysis of the system. The sections containing the mathematical analysis are not essential to understanding the rest of the chapter and are marked with a ★. If you ...
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