Entropy-constrained quantization for existing video decoders

Yong Han Kim; Katsutoshi Sawada

doi:10.1117/12.131494

1 November 1992 Entropy-constrained quantization for existing video decoders

Yong Han Kim, Katsutoshi Sawada

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131494
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

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.

Citation Download Citation

Yong Han Kim and Katsutoshi Sawada "Entropy-constrained quantization for existing video decoders", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131494

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