A Spatial Filtering Approach for Directional Audio Coding

Kallinger M, Ochsenfeld H, Del Galdo G, Kuech F, Mahne D, Schultz-Amling R, Thiergart O. A Spatial Filtering Approach for Directional Audio Coding. In: AES Convention 126. Audio Engineering Society; 2009. Paper 7653. Available from: https://aes.org/publications/elibrary-page/?id=14849

@inproceedings{Kallinger2009_14849,
  author = {Kallinger, Markus and Ochsenfeld, Henning and Del Galdo, Giovanni and Kuech, Fabian and Mahne, Dirk and Schultz-Amling, Richard and Thiergart, Oliver},
  title = {{A Spatial Filtering Approach for Directional Audio Coding}},
  booktitle = {AES Convention 126},
  note = {Paper 7653},
  year = {2009},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14849}
}

TY  - CPAPER
TI  - A Spatial Filtering Approach for Directional Audio Coding
AU  - Kallinger, Markus
AU  - Ochsenfeld, Henning
AU  - Del Galdo, Giovanni
AU  - Kuech, Fabian
AU  - Mahne, Dirk
AU  - Schultz-Amling, Richard
AU  - Thiergart, Oliver
T2  - AES Convention 126
M1  - Paper 7653
PY  - 2009
DA  - 2009/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14849
PB  - Audio Engineering Society
LA  - en
AB  - In hands-free telephony, spatial filtering techniques are employed to enhance intelligibility of speech. More precisely, these techniques aim at reducing the reverberation of the desired speech signal and attenuating interferences. Additionally, it is well-known that the spatially separate reproduction of desired and interfering sources enhance intelligibility of speech. For the latter task, Directional Audio Coding (DirAC) has proven to be an efficient method to capture and reproduce spatial sound. In this contribution, we propose a spatial filtering processing block, which works in the parameter domain of DirAC. Simulation results show that compared to a standard beamformer the novel technique offers significantly higher interference attenuation, while introducing comparably low distortion of the desired signal. Additional subjective tests of speech intelligibility confirm the instrumentally obtained results.
ER  -