venkatesh-adaptivedepletion-1996.pdf (1.57 MB)
Adaptive depletion for improvement of MPEG video compression
conference contribution
posted on 1996-01-01, 00:00 authored by D Tan, Svetha VenkateshSvetha Venkatesh, G WestTraditional 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.
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
Event
Digital Video Compression : Algorithms and Technologies (1996 : San Jose, Calif.)Pagination
154 - 168Publisher
SPIELocation
San Jose, Calif.Place of publication
Bellingham, Wash.Publisher DOI
Start date
1996-01-31End date
1996-02-02ISSN
0277-786XISBN-10
0819420425Language
engPublication classification
E1.1 Full written paper - refereedCopyright notice
1996, SPIEEditor/Contributor(s)
V Bhaskaran, F Sijstermans, S PanchanathanTitle of proceedings
SPIE 1996 : Proceedings of SPIE - the International Society for Optical EngineeringUsage metrics
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