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Proceedings Paper

Entropy-constrained quantization for existing video decoders
Author(s): Yong Han Kim; Katsutoshi Sawada
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Paper Abstract

Once video coding standards are finalized, decoders are completely specified so that encoders from different providers can maintain the inter-operability. However, some of the encoding parameters such as the decision thresholds of the embedded quantizers and the buffer-control schemes still remain at designer's freedom. Taking advantage of this freedom, this paper concentrates on the design of encoders for existing decoders. More specifically, an entropy- constrained design approach is described only for the quantizer decision thresholds within encoders while the reconstruction levels and the variable-length code (VLC) table remain unchanged. The efficiency of the new method is demonstrated through an example of the well- known Lloyd-Max quantizers operating on broad-tailed generalized Gaussian distributed memoryless sources.

Paper Details

Date Published: 1 November 1992
PDF: 7 pages
Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); doi: 10.1117/12.131494
Show Author Affiliations
Yong Han Kim, Electronics and Telecommunications Research Institute (South Korea)
Katsutoshi Sawada, NTT Human Interface Labs. (Japan)

Published in SPIE Proceedings Vol. 1818:
Visual Communications and Image Processing '92
Petros Maragos, Editor(s)

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