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venkatesh-adaptivedepletion-1996.pdf (1.57 MB)

Adaptive depletion for improvement of MPEG video compression

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conference contribution
posted on 1996-01-01, 00:00 authored by D Tan, Svetha VenkateshSvetha Venkatesh, G West
Traditional data compression algorithms for 2D images work using the information theoretic paradigm, attempting to reduce redundant information by as much as possible. However, through the use of a depletion algorithm that takes advantage of characteristics of the human visual system, images can be displayed using only half or a quarter of the original information with no appreciable loss of quality.

The characteristics of the human visual system that allows the viewer to perceive a higher rate of information than is actually displayed is known as the beta or picket fence effect. It is called the picket fence effect because its effect is noticeable when a person is travelling along a picket fence. Despite the person not having an unimpeded view of the objects behind the fence at any instant, as the person is moving, the objects behind the picket fence are clearly visible. In fact, in most cases the fence is hardly noticeable at all.

The techniques we have developed uses this effect to achieve higher levels of compression than would otherwise be possible. As a fundamental characteristic of the beta effect is the requirement that there is movement of the fence in relation to the object, the beta effect can only be used in image sequences where movement between the depletion pattern and objects within the image can be achieved.

As MPEG is the recognised standard by which image sequences are coded, compatibility with MPEG is essential. We have modified our technique such that it performs in conjunction with MPEG, providing further compression over MPEG.

History

Pagination

154 - 168

Location

San Jose, Calif.

Open access

  • Yes

Start date

1996-01-31

End date

1996-02-02

ISSN

0277-786X

ISBN-10

0819420425

Language

eng

Publication classification

E1.1 Full written paper - refereed

Copyright notice

1996, SPIE

Editor/Contributor(s)

V Bhaskaran, F Sijstermans, S Panchanathan

Title of proceedings

SPIE 1996 : Proceedings of SPIE - the International Society for Optical Engineering

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