Random rounding in redundant representations

Bernhard G. Bodmann; Stanley P. Lipshitz

doi:10.1117/12.730798

13 September 2007 Random rounding in redundant representations

Bernhard G. Bodmann, Stanley P. Lipshitz

Proceedings Volume 6701, Wavelets XII; 670103 (2007) https://doi.org/10.1117/12.730798
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

This paper investigates the performance of randomly dithered first and higher-order sigma-delta quantization applied to the frame coefficients of a vector in a infinite-dimensional Hilbert space. We compute the mean square error resulting from linear reconstruction with the quantized frame coefficients. When properly dithered, this computation simplifies in the same way as under the assumption of the white-noise hypothesis. The results presented here are valid for a uniform mid-tread quantizer operating in the no-overload regime. We estimate the large-redundancy asymptotics of the error for each family of tight frames obtained from regular sampling of a bounded, differentiable path in the Hilbert space. In order to achieve error asymptotics that are comparable to the quantization of oversampled band-limited functions, we require the use of smoothly terminated frame paths.

Citation Download Citation

Bernhard G. Bodmann and Stanley P. Lipshitz "Random rounding in redundant representations", Proc. SPIE 6701, Wavelets XII, 670103 (13 September 2007); https://doi.org/10.1117/12.730798

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