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Proceedings Paper

Preprocessing of video for compression
Author(s): Rajesh Rajagopalan; Michael T. Orchard
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Paper Abstract

This paper addresses the issue of introducing information loss in a video sequence prior to coding with the objective of maintaining visual quality while lowering the bit rate required to code the video. We argue that managing perceptually meaningful information if better accomplished in the motion domain rather than the pixel intensity domain. Based on recent advances in motion estimation and modeling, we introduce a representation of video data using motion information wherein every frame of a sequence is replaced with a field of interframe correspondences. Knowledge of the previous frame along with the filed of interframe correspondences is sufficient to reconstruct the current frame. Preprocessing is accomplished by filtering interframe correspondences and generating processed video using the filtered correspondence field. Simulations using the MPEG video coding standard reveal that rate gains of up to 20 percent are possible when filtering such that the processed and original video are of similar visual quality.

Paper Details

Date Published: 10 January 1997
PDF: 12 pages
Proc. SPIE 3024, Visual Communications and Image Processing '97, (10 January 1997); doi: 10.1117/12.263205
Show Author Affiliations
Rajesh Rajagopalan, IBM Thomas J. Watson Research Ctr. (United States)
Michael T. Orchard, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 3024:
Visual Communications and Image Processing '97
Jan Biemond; Edward J. Delp III, Editor(s)

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