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Principles and analysis of the squeezing approach to low bit rate spatial audio coding

Conference Paper


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Abstract


  • This paper presents a novel solution to multichannel spatial audio coding: Spatial Squeezing Surround Audio Coding (S3AC). The S3AC scheme analyses a multichannel audio signal and downmixes it into a stereo signal pair containing both the monophonic properties of audio sources and their localization information; this avoids the need for side information. The approach uses time-frequency analysis of a spatial audio scene and exploits virtual sources and amplitude panning techniques to squeeze 360ú of a horizontal soundfield to a 60ú stereo signal pair. In comparison with other spatial audio coding techniques, S3AC significantly advances in-band encoding of the localization information in the original sound scene and achieves accurate recoverability of dynamic localized sources.

Authors


  •   Cheng, Bin (external author)
  •   Ritz, Christian H.
  •   Burnett, Ian S. (external author)

Publication Date


  • 2007

Citation


  • B. Cheng, C. H. Ritz & I. S. Burnett, "Principles and analysis of the squeezing approach to low bit rate spatial audio coding," in International Conference on Acoustics, Speech, and Signal Processing, 2007, pp. I-13-I-16.

Scopus Eid


  • 2-s2.0-34547588330

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1518&context=infopapers

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/518

Start Page


  • I-13

End Page


  • I-16

Abstract


  • This paper presents a novel solution to multichannel spatial audio coding: Spatial Squeezing Surround Audio Coding (S3AC). The S3AC scheme analyses a multichannel audio signal and downmixes it into a stereo signal pair containing both the monophonic properties of audio sources and their localization information; this avoids the need for side information. The approach uses time-frequency analysis of a spatial audio scene and exploits virtual sources and amplitude panning techniques to squeeze 360ú of a horizontal soundfield to a 60ú stereo signal pair. In comparison with other spatial audio coding techniques, S3AC significantly advances in-band encoding of the localization information in the original sound scene and achieves accurate recoverability of dynamic localized sources.

Authors


  •   Cheng, Bin (external author)
  •   Ritz, Christian H.
  •   Burnett, Ian S. (external author)

Publication Date


  • 2007

Citation


  • B. Cheng, C. H. Ritz & I. S. Burnett, "Principles and analysis of the squeezing approach to low bit rate spatial audio coding," in International Conference on Acoustics, Speech, and Signal Processing, 2007, pp. I-13-I-16.

Scopus Eid


  • 2-s2.0-34547588330

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1518&context=infopapers

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/518

Start Page


  • I-13

End Page


  • I-16