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Convention Paper

Iterative Method for Natural Sampling

Authors: Jang, Seong-cheol; Shimanskiy, Vladislav

AES Convention 121 · Paper 6947 · October 2006

Abstract

Performance of pure digital audio amplifiers using pulse width modulation (PWM) highly depends on the accuracy of the pulse-coded audio (PCM) signal to PWM modulation sequence conversion. This process implies the recovery of original analog signal values at irregular time instances bearing on a uniformly distributed PCM data only. The recovery, or “natural sampling”, requires interpolation processing giving a trade-off between accuracy of the result and computation speed. In this paper we propose a method for natural sampling providing tunable speed-performance constrains while giving the advantage of easy implementation in VLSI. Cubic polynomial interpolation and iterative solving algorithm, as well as experimental results, are presented in the paper.

Details

Published in
AES Convention 121
AES Convention
121
Paper number
6947
Publication date
October 6, 2006
Session subject
Amplifiers & High Resolution
Affiliation
Samsung Electronics Co., Ltd. (See document for exact affiliation information.)
Type
Convention Paper