An Active Multichannel Downmix Enhancement for Minimizing Spatial and Spectral Distortions

Thompson J, Warner A, Smith B. An Active Multichannel Downmix Enhancement for Minimizing Spatial and Spectral Distortions. In: AES Convention 127. Audio Engineering Society; 2009. Paper 7913. Available from: https://aes.org/publications/elibrary-page/?id=15108

@inproceedings{Thompson2009_15108,
  author = {Thompson, Jeffrey and Warner, Aaron and Smith, Brandon},
  title = {{An Active Multichannel Downmix Enhancement for Minimizing Spatial and Spectral Distortions}},
  booktitle = {AES Convention 127},
  note = {Paper 7913},
  year = {2009},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15108}
}

TY  - CPAPER
TI  - An Active Multichannel Downmix Enhancement for Minimizing Spatial and Spectral Distortions
AU  - Thompson, Jeffrey
AU  - Warner, Aaron
AU  - Smith, Brandon
T2  - AES Convention 127
M1  - Paper 7913
PY  - 2009
DA  - 2009/10/06
UR  - https://aes.org/publications/elibrary-page/?id=15108
PB  - Audio Engineering Society
LA  - en
AB  - With the continuing growth of multichannel audio formats, the issue of downmixing to legacy formats such as stereo or mono remains an important problem. Traditional downmix methods use fixed downmix coefficients and mixing equations to blindly combine N input channels into M output channels, where N is greater than M. This commonly produces unpredictable and unsatisfactory results due to the dependence of these passive methods on input signal characteristics. In this paper, an active downmix enhancement employing frequency domain analysis of key inter-channel spatial cues is described which minimizes various distortions commonly observed in passively downmixed audio such as spatial inaccuracy, timbre change, signal coloration, and reduced intelligibility.
ER  -