A Hierarchical Approach to Lossless Coding of Multichannel and Immersive Audio

Hirvonen T, Namazi M, Tejeda Ocampo C. A Hierarchical Approach to Lossless Coding of Multichannel and Immersive Audio. In: Convention Paper. Audio Engineering Society; 2024. Paper 10686. Available from: https://aes.org/publications/elibrary-page/?id=22499

@inproceedings{Hirvonen2024_22499,
  author = {Hirvonen, Toni and Namazi, Mahmoud and Tejeda Ocampo, Carlos},
  title = {{A Hierarchical Approach to Lossless Coding of Multichannel and Immersive Audio}},
  note = {Paper 10686},
  year = {2024},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22499}
}

TY  - CPAPER
TI  - A Hierarchical Approach to Lossless Coding of Multichannel and Immersive Audio
AU  - Hirvonen, Toni
AU  - Namazi, Mahmoud
AU  - Tejeda Ocampo, Carlos
M1  - Paper 10686
PY  - 2024
DA  - 2024/06/06
UR  - https://aes.org/publications/elibrary-page/?id=22499
PB  - Audio Engineering Society
LA  - en
AB  - Techniques for improving multichannel lossless coding are introduced. A method is proposed for hierarchical simultaneous coding of two or more different mixes of the same content. Unlike in prior methods limited to cascaded Toeplitz systems, the prediction parameters are jointly optimized via a general linear solver, and the prediction residual is Rice coded. Additionally, the use of a projection prior to residual coding is proposed as being of general benefit in lossless audio coding. Comparisons with various multichannel and immersive material are made against more traditional methods, including FLAC. The proposed methods show improved compression ratios for surround music alone, as well as for hierarchical coding. Future work would include further validation and improved modeling of a non-static downmix relation to upmix.
ER  -