Atom modulus quantization for matching pursuit video coding
(2002) Proceedings of ICIP 2002 International Conference on Image Processing — Location: Rochester, NY, USA (22.September.2002)
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- Abstract
- We provide an analytical study of the selection and modulus quantization of matching pursuits (MP) coefficients. We demonstrate that an optimal rate-distortion trade-off is achieved by selecting the atoms up to a dead-zone threshold, and by defining the modulus quantizer in terms of that threshold. In doing so, we take into account quantization error re-injection resulting from inserting the modulus quantizer inside the MP atom computation loop. In-loop quantization affects the stepsize of the uniform quantizer, and results in a non-uniform optimal entropy constrained quantizer. Improvements larger than one dB are obtained for video coding.
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De Vleeschouwer, C., & Zakhor, A. (2002). Atom modulus quantization for matching pursuit video coding. Proceedings of the International Conference on Image Processing, Rochester, NY, USA. Published. Proceedings of ICIP 2002 International Conference on Image Processing, Rochester, NY, USA. https://doi.org/10.1109/ICIP.2002.1039062