Perceptually Motivated Bitrate Allocation for Object-Based Audio Using Opus Codec

Hirvonen T, Tejeda-Ocampo C, Souza-Blanes E, Bharitkar S. Perceptually Motivated Bitrate Allocation for Object-Based Audio Using Opus Codec. In: AES Convention 155. Audio Engineering Society; 2023. Paper 125. Available from: https://aes.org/publications/elibrary-page/?id=22279

@inproceedings{Hirvonen2023_22279,
  author = {Hirvonen, Toni and Tejeda-Ocampo, Carlos and Souza-Blanes, Ema and Bharitkar, Sunil},
  title = {{Perceptually Motivated Bitrate Allocation for Object-Based Audio Using Opus Codec}},
  booktitle = {AES Convention 155},
  note = {Paper 125},
  year = {2023},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22279}
}

TY  - CPAPER
TI  - Perceptually Motivated Bitrate Allocation for Object-Based Audio Using Opus Codec
AU  - Hirvonen, Toni
AU  - Tejeda-Ocampo, Carlos
AU  - Souza-Blanes, Ema
AU  - Bharitkar, Sunil
T2  - AES Convention 155
M1  - Paper 125
PY  - 2023
DA  - 2023/10/06
UR  - https://aes.org/publications/elibrary-page/?id=22279
PB  - Audio Engineering Society
LA  - en
AB  - With the increasing popularity of immersive audio, using legacy tools for these new formats can be challenging. This paper presents an overview of how to utilize the Opus audio codec for object-based audio. We reviewed the performance of Opus using two different bit-allocation strategies: a vanilla method that uses the same bitrate for each object, and a joint allocation method that distributes the total bitrate among objects using their perceptual importance. The proposed joint allocation outperformed the vanilla method at half the total bitrate, and achieved an "Excellent" score during MUSHRA testing at 480 kbit/s for content with 20 objects.
ER  -