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IEEE Journal on Selected Areas in Communications
Volume 16 Number 1, January 1998

Object-Oriented H.263 Compatible Video Coding Platform for Conferencing Applications

Page 42.

Abstract:

This paper describes a prototype video coding platformThroughout this paper, the term "platform" is used to actually mean an encoding platform, which produces a compressed bit stream, and a decoding platform which produces decoded images from the bit stream. meant for the conception and testing of multimedia products such as next-generation videophones. The platform is largely based on ITU-T Recommendation H.263, with a number of additional object-oriented quality enhancement features which make it especially well suited for very low bit-rate coding of "head-and-shoulders" video material typical of real-time multimedia applications, video teleconferencing, and video telephony. These features consist of: 1) segmentation into objects of interest, 2) segmentation-based prefiltering, 3) model-assisted rate control, 4) adaptive vector quantization, and finally 5) segmentation-based postfiltering. In the spirit of Recommendation H.263, these enhancements are modular and can be selectively turned on or off, thereby enabling a wide variety of coding modes.

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