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Proceedings Paper

Use of Moment Preserving Quantizers In Differential Pulse Code Modulation (DPCM) Image Coding
Author(s): Edward J. Delp; O. Robert Mitchell
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Paper Abstract

In this paper we present results of a study using a moment preserving (MP) quantizer in predictive (DPCM) coding of images. The MP quantizer is designed such that the quantizer preserves statistical moments of the input and output of the quantizer. This quantizer has previously been shown by the authors to work quite well in a PCM image compression scheme. In this paper we extend the use of MP quantizers to predictive coding. We show that the moment preserving quantizer works quite well at data rates of 1.18 bits/pixel. The quantizer scheme is block adaptive, i.e. the picture to be coded is divided into non-overlapping blocks and from block to block the quantizer parameters are changed. A theoretical analysis is presented whereby necessary and sufficient conditions are derived relating the moment preserving properties of the quantizer to the moment preserving properties of the original image data. The performance of the moment preserving quantizer in DPCM is compared to classical minimum mean square error quantizers. These methods are also compared in the presence of channel errors.

Paper Details

Date Published: 11 November 1980
PDF: 8 pages
Proc. SPIE 0249, Advances in Image Transmission II, (11 November 1980); doi: 10.1117/12.959416
Show Author Affiliations
Edward J. Delp, Purdue University (United States)
O. Robert Mitchell, Purdue University (United States)

Published in SPIE Proceedings Vol. 0249:
Advances in Image Transmission II
Andrew G. Tescher, Editor(s)

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