Efficient transform coding of two-channel audio signals by means of complex-valued stereo prediction

  title={Efficient transform coding of two-channel audio signals by means of complex-valued stereo prediction},
  author={Christian R. Helmrich and Pontus Carlsson and Sascha Disch and Bernd Edler and Johannes Hilpert and Matthias Neusinger and Heiko Purnhagen and Nikolaus Rettelbach and Julien Robilliard and Lars F. Villemoes},
  journal={2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
Traditional MDCT-based perceptual audio coding schemes employ mid/side and intensity stereo techniques to allow efficient joint coding of the two channels of a stereophonic signal. These techniques, however, provide only little coding gain for critical stereo signals characterized by spectral components with a distinct level or phase difference between the channels. To overcome this deficiency, we propose an extension to the mid/side coding paradigm that utilizes complex-valued inter-channel… CONTINUE READING


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