Subband coding is a well known technique for lossy data compression and has been widely used in speech, music, and image compression practice. However, unlike transform coding theory, the theory of optimal subband coders is only beginning to be understood. In this talk we begin with a brief overview of known results and open problems and then give a detailed presentation of optimal subband coders. In particular we consider the problem of designing the analysis filters in an orthonormal subband coder in such a way that the coding gain is maximized. Some less-known differences between subband coders and transform coders, and their connection to the energy compaction problem will also be highlighted.
12:00 PM (NOTE TIME)
Abercrombie A126
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