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Proceedings Paper

Low Bit-Rate Image Coding Based On Evaluation Of Motion Sequence
Author(s): G. Tu; L. Cleymans; L. Van Eycken; A. Oosterlinck
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Paper Abstract

A new coding strategy for low bit-rate (64 Kb/s) image sequence transmission is presented. On the contrary to the conventional motion estimation methods in which only the immediate former frame is referenced for obtaining the motion patterns, more than one previous frames are used in the motion evaluation procedure to estimate the temporary motion behavior. Another sequence, which is called "the motion sequence", is estabished, alongside the image sequence. Through investigating and analysing the previous frame of the motion sequence the moving objects can be identified from the background and consequently two different image signals are separated. The coding operation is then controlled by the information from the motion sequence. The moving parts of the image data are coded in its normal frame sampling frequency while the background data can be treated coarsely by refreshing them in a much lower frequency. A finally reconstructed image frame is then an unchanged background superimposed by the decoded moving objects. This low bit-rate coding method is especially interesting in the applications such as teleconferencing and videophone in which the moving objects are usually the type of "head and shoulder" and the background data are usually unchanged.

Paper Details

Date Published: 30 January 1990
PDF: 8 pages
Proc. SPIE 1153, Applications of Digital Image Processing XII, (30 January 1990); doi: 10.1117/12.962307
Show Author Affiliations
G. Tu, Catholic University of Leuven (Belgium)
L. Cleymans, Catholic University of Leuven (Belgium)
L. Van Eycken, Catholic University of Leuven (Belgium)
A. Oosterlinck, Catholic University of Leuven (Belgium)

Published in SPIE Proceedings Vol. 1153:
Applications of Digital Image Processing XII
Andrew G. Tescher, Editor(s)

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