A Comparison of the Performance of 'Pruned Tree' versus 'Stack" Algorithms for Look-Ahead Sigma delta Modulators

Angus, JAS 2006, 'A Comparison of the Performance of 'Pruned Tree' versus 'Stack" Algorithms for Look-Ahead Sigma delta Modulators' , Journal of the Audio Engineering Society, 54 (6) , pp. 477-494.

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Look-ahead Sigma-Delta modulators look forward k samples before deciding to output a “one” or a “zero”. The Viterbi algorithm is then used to search the trellis of the exponential number of possibilities that such a procedure generates. This paper describes alternative tree based algorithms. Tree based algorithms are simpler to implement because they do not require backtracking to determine the correct output value. They can also be made more efficient using “Stack” algorithms. Both the tree algorithm and the more computationally efficient “Stack” algorithms are described. Implementations of both algorithms are described in some detail. In particular, the appropriate data structures for both the trial filters and score memories. Comparative results of their performance are also presented.

Item Type: Article
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Schools > School of the Built Environment
Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Journal of the Audio Engineering Society
Publisher: Audio Engineering Society Inc
Refereed: Yes
ISSN: 0004-7554
Depositing User: H Kenna
Date Deposited: 10 Sep 2007 10:18
Last Modified: 03 Nov 2017 15:16
URI: http://usir.salford.ac.uk/id/eprint/419

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