Efficient Algorithms for Look-Ahead Sigma-Delta Modulators

Angus JA. Efficient Algorithms for Look-Ahead Sigma-Delta Modulators. In: AES Convention 115. Audio Engineering Society; 2003. Paper 5950. Available from: https://aes.org/publications/elibrary-page/?id=12436

@inproceedings{Angus2003_12436,
  author = {Angus, James A.},
  title = {{Efficient Algorithms for Look-Ahead Sigma-Delta Modulators}},
  booktitle = {AES Convention 115},
  note = {Paper 5950},
  year = {2003},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12436}
}

TY  - CPAPER
TI  - Efficient Algorithms for Look-Ahead Sigma-Delta Modulators
AU  - Angus, James A.
T2  - AES Convention 115
M1  - Paper 5950
PY  - 2003
DA  - 2003/10/06
UR  - https://aes.org/publications/elibrary-page/?id=12436
PB  - Audio Engineering Society
LA  - en
AB  - Trellis Noise-Shaping Sigma-Delta modulators look forward at k samples of the signal 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. Means of making the search more computationally efficient have been proposed. This paper describes alternative tree based algorithms that can also be used search the exponential number possibilities generated by lookahead noise-shaping S-D modulators. Tree based algorithms are simpler to implement because they do not require backtracking through an array of scores to determine the correct output value. They can also be made more efficient via the use of the 'Fano' or 'Stack' algorithms, which are described.
ER  -