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Proceedings Paper

Image Coding: Variable Rate Differential Pulse Code Modulation Through Fixed Rate Channel
Author(s): Andrew G. Tescher; Richard V. Coxt
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Paper Abstract

A previously-developed block adaptive Differential Pulse Code Modulation (DPCM) procedure has been combined with a buffer feedback technique. The result is an efficient variable rate DPCM algorithm. The new technique is fully adaptive, yet it retains the basic simplicity of DPCM. It utilizes the appropriate quantizer parameters and also assigns the available channel bandwidth according to need as determined by the local image structure. A buffer feedback procedure, previously reported by the authors, has been generalized and was implemented to control the bit rate selection. Examples demonstrate that the algorithm is successful in achieving adaptivity objectives. Although buffer control requires additional hardware, because of its relatively low speed, the impact on overall hardware complexity is negligible.

Paper Details

Date Published: 8 December 1977
PDF: 9 pages
Proc. SPIE 0119, Applications of Digital Image Processing, (8 December 1977); doi: 10.1117/12.955708
Show Author Affiliations
Andrew G. Tescher, The Aerospace Corporation (United States)
Richard V. Coxt, The Aerospace Corporation (United States)

Published in SPIE Proceedings Vol. 0119:
Applications of Digital Image Processing
Andrew G. Tescher, Editor(s)

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