Implementation of "Tree" and “Stack” Algorithms for Look-Ahead Sigma Delta Modulators

Angus JAS. Implementation of "Tree" and “Stack” Algorithms for Look-Ahead Sigma Delta Modulators. In: AES Convention 117. Audio Engineering Society; 2004. Paper 6281. Available from: https://aes.org/publications/elibrary-page/?id=12938

@inproceedings{Angus2004_12938,
  author = {Angus, James A. S.},
  title = {{Implementation of "Tree" and “Stack” Algorithms for Look-Ahead Sigma Delta Modulators}},
  booktitle = {AES Convention 117},
  note = {Paper 6281},
  year = {2004},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12938}
}

TY  - CPAPER
TI  - Implementation of "Tree" and “Stack” Algorithms for Look-Ahead Sigma Delta Modulators
AU  - Angus, James A. S.
T2  - AES Convention 117
M1  - Paper 6281
PY  - 2004
DA  - 2004/10/06
UR  - https://aes.org/publications/elibrary-page/?id=12938
PB  - Audio Engineering Society
LA  - en
AB  - 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.
ER  -