A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding

Vilermo M. A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding. In: AES Convention 125. Audio Engineering Society; 2008. Paper 7621. Available from: https://aes.org/publications/elibrary-page/?id=14772

@inproceedings{Vilermo2008_14772,
  author = {Vilermo, Miikka},
  title = {{A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding}},
  booktitle = {AES Convention 125},
  note = {Paper 7621},
  year = {2008},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14772}
}

TY  - CPAPER
TI  - A Framework for a Near-Optimal Excitation Based Rate-Distortion Algorithm for Audio Coding
AU  - Vilermo, Miikka
T2  - AES Convention 125
M1  - Paper 7621
PY  - 2008
DA  - 2008/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14772
PB  - Audio Engineering Society
LA  - en
AB  - An optimal excitation based rate-distortion algorithm remains an elusive target in audio coding. Typical complexity of the problem for one frame alone is in the order of 60^50. This paper presents a framework for reducing that complexity. Excitation is calculated using cochlear filters that have relatively steep slopes above and below the central frequency of the filter. An approximation of the excitation can be calculated by limiting the cochlear filters to a small frequency region. For example, the cochlear filters may span 15 subbands. In this way, the complexity can be reduced approximately to the order of 60^15*50.
ER  -