Locally adaptive perceptual quantization without side information for compression of visual data

Ingo Hontsch, Lina Karam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This paper presents a locally-adaptive perceptual quantization scheme for visual data compression. The strategy is to exploit human visual masking properties by deriving masking thresholds in a locally-adaptive fashion based on a sub-band decomposition. The derived masking thresholds are used in controlling the quantization stage by adapting the quantizer reconstruction levels to the local amount of masking present at the level of each sub-band transform coefficient. Compared to the existing non locally-adaptive perceptual quantization methods, the new locally-adaptive algorithm exhibit superior performance and does not require additional side information. This is accomplished by estimating the amount of available masking from the already quantized data and linear prediction of the coefficient under consideration. By virtue of the local adaptation, the proposed quantization scheme is able to remove a large amount of perceptually redundant information. Since the algorithm does not require additional side information, it yields a low entropy representation of the image and is well suited for perceptually-lossless image compression.

Original languageEnglish (US)
Title of host publicationConference Record / IEEE Global Telecommunications Conference
Editors Anon
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages1042-1046
Number of pages5
Volume2
StatePublished - 1997
EventProceedings of the 1997 IEEE Global Telecommunications Conference. Part 2 (of 3) - Phoenix, AZ, USA
Duration: Nov 3 1997Nov 8 1997

Other

OtherProceedings of the 1997 IEEE Global Telecommunications Conference. Part 2 (of 3)
CityPhoenix, AZ, USA
Period11/3/9711/8/97

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Global and Planetary Change

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  • Cite this

    Hontsch, I., & Karam, L. (1997). Locally adaptive perceptual quantization without side information for compression of visual data. In Anon (Ed.), Conference Record / IEEE Global Telecommunications Conference (Vol. 2, pp. 1042-1046). IEEE.