Ambience extraction and synthesis from stereo signals for multi-channel audio up-mix

@article{Avendao2002AmbienceEA,
  title={Ambience extraction and synthesis from stereo signals for multi-channel audio up-mix},
  author={Carlos Avenda{\~n}o and Jean-Marc Jot},
  journal={2002 IEEE International Conference on Acoustics, Speech, and Signal Processing},
  year={2002},
  volume={2},
  pages={II-1957-II-1960}
}
In this paper we propose a frequency-domain technique to identify and extract the ambience information in stereo audio signals. The method is based on the computation of an inter-channel coherence index and a non-linear mapping function that allow us to determine time-frequency regions that consist mostly of ambience components in the two-channel signal. Ambience signals are then synthesized and used to feed the surround channels of a multichannel playback system. Simulation results demonstrate… CONTINUE READING

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