MPEG-4 and rate-distortion-based shape-coding techniques

Aggelos K. Katsaggelos*, Lisimachos P. Kondi, Fabian W. Meier, Jörn Ostermann, Guido M. Schuster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

152 Scopus citations


In this paper, we address the problem of the efficient encoding of object boundaries. This problem is becoming increasingly important in applications such (is content-based storage and retrieval, studio and television postproduction, and mobile multimedia applications. The MPEG-4 visual standard will allow the transmission of arbitrarily shaped video objects. The techniques developed for shape coding within the MPEG-4 standardization effort arc described and compared first. A framework for the representation of shapes using their contours is presented next. Such representations are achieved using cun'es of various orders, and they are optimal in the rate-distortion sense. Last, conclusions are drawn.

Original languageEnglish (US)
Pages (from-to)1126-1153
Number of pages28
JournalProceedings of the IEEE
Issue number6
StatePublished - 1998


  • Boundary coding
  • MPEG-4
  • Rate-distortion theory
  • Shape coding
  • Video coding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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