Memory Requirements Reduction Technique for Delay Storage in Real Time Acoustic Cameras

Sánchez-Hevia HA, Mohino-Herranz I, Gil-Pita R, Rosa-Zurera M. Memory Requirements Reduction Technique for Delay Storage in Real Time Acoustic Cameras. In: AES Convention 136. Audio Engineering Society; 2014. Paper 9031. Available from: https://aes.org/publications/elibrary-page/?id=17178

@inproceedings{SanchezHevia2014_17178,
  author = {Sánchez-Hevia, Héctor A. and Mohino-Herranz, Inma and Gil-Pita, Roberto and Rosa-Zurera, Manuel},
  title = {{Memory Requirements Reduction Technique for Delay Storage in Real Time Acoustic Cameras}},
  booktitle = {AES Convention 136},
  note = {Paper 9031},
  year = {2014},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17178}
}

TY  - CPAPER
TI  - Memory Requirements Reduction Technique for Delay Storage in Real Time Acoustic Cameras
AU  - Sánchez-Hevia, Héctor A.
AU  - Mohino-Herranz, Inma
AU  - Gil-Pita, Roberto
AU  - Rosa-Zurera, Manuel
T2  - AES Convention 136
M1  - Paper 9031
PY  - 2014
DA  - 2014/04/06
UR  - https://aes.org/publications/elibrary-page/?id=17178
PB  - Audio Engineering Society
LA  - en
AB  - Acoustic cameras are devices capable of displaying a visual representation of sound waves. Typically these devices relay on delay-based techniques, such as Delay and Sum Beamforming, being the calculation of the proper delay values a key component of the system. For real-time systems with a large amount of microphones it is not practical to perform such calculation being common to go for an offline strategy in which the pre-calculated values are stored in memory, allowing a faster dispatch of the data while increasing memory requirements. In this paper we present a technique for delay storage optimization based on various symmetries found within the pre-calculated values that allow a reduction up to almost 16 times over the initial memory requirements.
ER  -