Effros, M. and Chou, P. A. (1995) Weighted universal bit allocation: optimal multiple quantization matrix coding. In: IEEE International Conference on Acoustics, Speech, and Signal (ICASSP '95), Detroit, MI, 9-12 May 1995. Vol.4. IEEE , Piscataway, NJ, pp. 2343-2346. ISBN 0-7803-2431-5. https://resolver.caltech.edu/CaltechAUTHORS:EFFicassp95
![]()
|
PDF
See Usage Policy. 362kB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:EFFicassp95
Abstract
We introduce a two-stage bit allocation algorithm analogous to the algorithm for weighted universal vector quantization (WUVQ). The encoder uses a collection of possible bit allocations (typically in the form of a collection of quantization matrices) rather than a single bit allocation (or single quantization matrix). We describe both an encoding algorithm for achieving optimal compression using a collection of bit allocations and a technique for designing locally optimal collections of bit allocations. We demonstrate performance on a JPEG style coder using the mean squared error (MSE) distortion measure. On a sequence of medical brain scans, the algorithm achieves up to 2.5 dB improvement over a single bit allocation system, up to 5 dB improvement over a WUVQ with first- and second-stage vector dimensions equal to 16 and 4 respectively, and up to 12 dB improvement over an entropy constrained vector quantizer (ECVQ) using 4 dimensional vectors.
Item Type: | Book Section | ||||||
---|---|---|---|---|---|---|---|
Related URLs: |
| ||||||
Additional Information: | © Copyright 1995 IEEE. Reprinted with permission. This material is based upon work partially supported by an AT&T Graduate Scholarship and by a grant from the Center for Telecommunications at Stanford. | ||||||
Subject Keywords: | discrete cosine transforms; image coding; matrix algebra; medical image processing; transform coding; vector quantization; source code design; universal source coding; transforms for source coding | ||||||
DOI: | 10.1109/ICASSP.1995.479962 | ||||||
Record Number: | CaltechAUTHORS:EFFicassp95 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:EFFicassp95 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 7337 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Archive Administrator | ||||||
Deposited On: | 01 Feb 2007 | ||||||
Last Modified: | 08 Nov 2021 20:41 |
Repository Staff Only: item control page