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Separable Karhunen Loeve transforms for the weighted universal transform coding algorithm

Feng, Hanying and Effros, Michelle (1999) Separable Karhunen Loeve transforms for the weighted universal transform coding algorithm. In: IEEE International Conference on Acoustics, Speech, and Signal (ICASSP '99), Phoenix, AZ, 15-19 March 1999. Vol.5. IEEE , Piscataway, NJ, pp. 2435-2438. ISBN 0-7803-5041-3.

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The weighted universal transform code (WUTC) is a two-stage transform code that replaces JPEG's single, non-optimal transform code with a jointly designed collection of transform codes to achieve good performance across a broader class of possible sources. Unfortunately, the performance gains of WUTC are achieved at the expense of significant increases in computational complexity and larger codes. We here present a faster, more space-efficient WUTC algorithm. The new algorithm uses separable coding instead of direct KLT. While separable coding gives performance comparable to that of WUTC, it uses only 1/8 of the floating-point multiplications and 1/32 of storage of direct KLT. Experimental results included in this work compare the performance of new separable WUTC with both the WUTC and other fast variations of that algorithm.

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Additional Information:© Copyright 1999 IEEE. Reprinted with permission. This material is based upon work supported by NSF CAREER Award No. MIP-9501977, the Intel 2000 program, and the Powell Foundation.
Subject Keywords:Karhunen-Loeve transforms, computational complexity, image coding, transform coding, WUTC, separable coding, KLT, source code design, universal source coding, transforms for source coding
Record Number:CaltechAUTHORS:FENicassp99
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7387
Deposited By: Archive Administrator
Deposited On:07 Feb 2007
Last Modified:08 Nov 2021 20:42

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