Signal loss recovery in DCT-based image and video codecs

Yao Wang, Qinfan Zhu

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

Abstract

This paper presents a new technique for image reconstruction from a partial set of transform coefficients in DCT image coders. By utilizing the correlation between adjacent blocks and imposing smoothing constraints on the reconstructed image, the proposed algorithm produces an image which is maximally smooth among all the images with the same available coefficients. The optimal solution can be obtained either by a linear transformation or through an iterative process. The underlying principle of the algorithm is applicable to any unitary block-transform and is very effective for recovering the DC and other low frequency coefficients. Applications in DCT based still image codecs and video codecs using motion compensation have been considered. Simulation results with still images show that a very good reconstruction can be obtained even when DC and certain low frequencies are missing in many blocks.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages667-678
Number of pages12
Editionpt 2
ISBN (Print)0819407429
StatePublished - 1991
EventVisual Communications and Image Processing '91: Visual Communications Part 2 (of 2) - Boston, MA, USA
Duration: Nov 11 1991Nov 13 1991

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Numberpt 2
Volume1605
ISSN (Print)0277-786X

Other

OtherVisual Communications and Image Processing '91: Visual Communications Part 2 (of 2)
CityBoston, MA, USA
Period11/11/9111/13/91

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Wang, Y., & Zhu, Q. (1991). Signal loss recovery in DCT-based image and video codecs. In Proceedings of SPIE - The International Society for Optical Engineering (pt 2 ed., pp. 667-678). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1605, No. pt 2). Publ by Int Soc for Optical Engineering.