Frequency Domain Techniques for Stereo to Multichannel Upmix

Avendano C, Jot JM. Frequency Domain Techniques for Stereo to Multichannel Upmix. In: AES Conference: 22nd International Conference: Virtual, Synthetic, and Entertainment Audio. Audio Engineering Society; 2002. Paper 000251. Available from: https://aes.org/publications/elibrary-page/?id=11131

@inproceedings{Avendano2002_11131,
  author = {Avendano, Carlos and Jot, Jean-Marc},
  title = {{Frequency Domain Techniques for Stereo to Multichannel Upmix}},
  booktitle = {AES Conference: 22nd International Conference: Virtual, Synthetic, and Entertainment Audio},
  note = {Paper 000251},
  year = {2002},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11131}
}

TY  - CPAPER
TI  - Frequency Domain Techniques for Stereo to Multichannel Upmix
AU  - Avendano, Carlos
AU  - Jot, Jean-Marc
T2  - AES Conference: 22nd International Conference: Virtual, Synthetic, and Entertainment Audio
M1  - Paper 000251
PY  - 2002
DA  - 2002/06/06
UR  - https://aes.org/publications/elibrary-page/?id=11131
PB  - Audio Engineering Society
LA  - en
AB  - In this paper we propose a series of upmixing techniques for generating multichannel audio from stereo recordings. The techniques use a common analysis framework based on the comparison between the Short-Time Fourier Transforms of the left and right stereo signals. An inter-channel coherence measure is used to identify time-frequency regions consisting mostly of ambience components, which can then be weighed via a non-linear mapping function, and extracted to synthesize ambience signals. A similarity measure is used to identify the panning coefficients of the various sources in the mix in the time-frequency plane, and different mapping functions are applied to unmix (extract) one or more sources, and/or to re-pan the signals into an arbitrary number of channels. We illustrate the application of the various techniques in the design of a two-to-five channel upmix system.
ER  -