Transform coding with backwards adaptive updates

The Karhunen–Loève transform (KLT) is optimal for trans- form coding of a Gaussian source. This is established for all scale-invariant quantizers, generalizing previous results. A backward adaptive technique for combating the data dependence of the KLT is proposed and analyzed. When the adapted transform converges to a KLT, the scheme is universal among transform coders. A variety of convergence results are proven.


Published in:
IEEE Transactions on Information Theory, 46, 4, 1623-1633
Year:
2000
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 Record created 2005-04-18, last modified 2018-03-17

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