Low-Delay Directional Audio Coding for Real-Time Human-Computer Interaction

Pihlajamäki T, Pulkki V. Low-Delay Directional Audio Coding for Real-Time Human-Computer Interaction. In: AES Convention 130. Audio Engineering Society; 2011. Paper 8413. Available from: https://aes.org/publications/elibrary-page/?id=15880

@inproceedings{Pihlajamaki2011_15880,
  author = {Pihlajamäki, Tapani and Pulkki, Ville},
  title = {{Low-Delay Directional Audio Coding for Real-Time Human-Computer Interaction}},
  booktitle = {AES Convention 130},
  note = {Paper 8413},
  year = {2011},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15880}
}

TY  - CPAPER
TI  - Low-Delay Directional Audio Coding for Real-Time Human-Computer Interaction
AU  - Pihlajamäki, Tapani
AU  - Pulkki, Ville
T2  - AES Convention 130
M1  - Paper 8413
PY  - 2011
DA  - 2011/05/06
UR  - https://aes.org/publications/elibrary-page/?id=15880
PB  - Audio Engineering Society
LA  - en
AB  - Games and virtual worlds require low-cost, good-quality and low-delay audio engines. The short-time Fourier transform (STFT) -based implementation of Directional Audio Coding (DirAC) for virtual worlds fulfills the two first demands. Unfortunately, the delay can be perceivably large. In this paper, a modification to DirAC is introduced that uses different time-frequency resolutions for STFT concurrently, which are not aligned in time in reproduction. This leads to the high-frequency non-diffuse content being reproduced as soon as possible and thus reduces the perceived delay. Informal tests show that the delay was short enough for a musician to play an instrument through the processing. Moreover, the results of formal listening tests show that the reduction in quality is perceptible but not annoying.
ER  -