Efficient encoding of DC coefficients in transform coding of images using JPEG scheme

Chun tat See, Kwok Tung Lo, Wai kuen Cham

Research output: Journal article publicationConference articleAcademic researchpeer-review

3 Citations (Scopus)


A minimum edge difference (MED) predictor is proposed to enhance the performance of the basic JPEG (Joint Photographic Experts Group) system. The MED predictor uses the edge difference between adjacent blocks for prediction of the DC coefficient of the current block. Analysis based on a statistical model shows that the proposed predictor can encode the DC coefficients more effectively than the JPEG predictor and the optimal signle element 1-D predictor. Computer simulation using real images also shows that, when the proposed MED predictor is used, there is about 5% bit rate reduction over the basic JPEG system.
Original languageEnglish
Pages (from-to)404-407
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 1 Dec 1991
Event1991 IEEE International Symposium on Circuits and Systems Part 1 (of 5) - Singapore, Singapore
Duration: 11 Jun 199114 Jun 1991

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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