Efficient Multichannel Audio Transform Coding with Low Delay and Complexity

Schuh F, Dick S, Füg R, Helmrich CR, Rettelbach N, Schwegler T. Efficient Multichannel Audio Transform Coding with Low Delay and Complexity. In: AES Convention 141. Audio Engineering Society; 2016. Paper 9660. Available from: https://aes.org/publications/elibrary-page/?id=18464

@inproceedings{Schuh2016_18464,
  author = {Schuh, Florian and Dick, Sascha and Füg, Richard and Helmrich, Christian R. and Rettelbach, Nikolaus and Schwegler, Tobias},
  title = {{Efficient Multichannel Audio Transform Coding with Low Delay and Complexity}},
  booktitle = {AES Convention 141},
  note = {Paper 9660},
  year = {2016},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18464}
}

TY  - CPAPER
TI  - Efficient Multichannel Audio Transform Coding with Low Delay and Complexity
AU  - Schuh, Florian
AU  - Dick, Sascha
AU  - Füg, Richard
AU  - Helmrich, Christian R.
AU  - Rettelbach, Nikolaus
AU  - Schwegler, Tobias
T2  - AES Convention 141
M1  - Paper 9660
PY  - 2016
DA  - 2016/09/06
UR  - https://aes.org/publications/elibrary-page/?id=18464
PB  - Audio Engineering Society
LA  - en
AB  - For multichannel input such as 5.1-surround material, contemporary transform-based perceptual audio codecs provide good coding quality even at very low bit-rates. These codecs rely on discrete joint-channel coding and parametric spatial coding schemes. The latter require dedicated complex-valued filter-banks around the core-codec, which increase both the algorithmic complexity and latency. This paper demonstrates that the discrete joint-channel as well as known semi-parametric spatial coding principles can also be realized directly within the real-valued modified discrete cosine transform (MDCT) domain of the core-coder, thereby eliminating the need for auxiliary filter-banks. The resulting fully flexible signal-adaptive coding scheme, when integrated into the MPEG-H 3D Audio codec, offers the same quality as the state of the art even at bit-rates as low as 80 kbit/s for 5.1-surround.
ER  -