SPIE Proceedings Vol. 2298

Editor(s): Andrew G. Tescher, Lockheed Palo Alto Research Lab., Saratoga, CA, USA.
ISBN: 0-8194-1622-3, 804 pages
Published 1994
Meeting Date: 07/24 - 07/29/94, San Diego, CA, USA

Adaptive subregion variable shape block compensated prediction

Paper #: 2298-04, pp.35-44

Author(s):  Nigel W. Garnham, University of Nottingham, University Park, Nottingham, United Kingdom;

            Mohammad K. Ibrahim, University of Nottingham, University Park, Nottingham, United Kingdom


This paper describes a general approach to interframe video coding using a method of local feature-based motion compensation. Used in conjunction with a DPCM/DCT interframe coding technique, such as the CCITT H.261 algorithm, this technique is computationally viable at real-time rates, employing a simple process of evaluating the nature and content of features and their subsequent displacement. 

As a secondary means of interframe coding, it has proved possible to introduce mode-value blocking and quantization to speed the motion estimation process and results indicate that as part of a hybrid encoding algorithm, this approach is quite acceptable as no long-term errors are propagated.

In addition to a description of feature analysis as a combinational coding method, it is shown that the process of feature extraction and evaluation provides, in it's own right, scope to form the basis of a complete, efficient codec of low complexity.

Back to publications.