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Transform coding with backward adaptive updates

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3 Author(s)
Goyal, V.K. ; Math. of Commun. Res. Dept., Lucent Technol. Bell Labs., Murray Hill, NJ, USA ; Zhuang, J. ; Veiterli, M.

The Karhunen-Loeve transform (KLT) is optimal for transform 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

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Information Theory, IEEE Transactions on  (Volume:46 ,  Issue: 4 )