Impulsive Sound Detection Directly in Sigma-Delta Domain
Recent implementations of Sigma-delta converters have achieved low cost, low power consumption and high integration while maintaining resolution as high as in Nyquist-rate converters. However its usage implies on a pre-processing stage to demodulate the source signal delivered from Sigma-delta modul...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2017-03-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/1904 |
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| _version_ | 1849250907298988032 |
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| author | Igor Dantas dos Santos MIRANDA Antonio C. de C. LIMA |
| author_facet | Igor Dantas dos Santos MIRANDA Antonio C. de C. LIMA |
| author_sort | Igor Dantas dos Santos MIRANDA |
| collection | DOAJ |
| description | Recent implementations of Sigma-delta converters have achieved low cost, low power consumption and high integration while maintaining resolution as high as in Nyquist-rate converters. However its usage implies on a pre-processing stage to demodulate the source signal delivered from Sigma-delta modulation to Pulse-Code Modulation (PCM). This work proposes an algorithm based on Discrete Cosine Transform for impulsive signal detection to be applied directly on modulated Sigma-delta bitstream, targeting to reduce computational cost in acoustic event detection applications such as gunshot recognition systems. From pre-recorded impulsive sounds in Sigma-delta format, it has been shown that the new method presents similar error rate in comparison with traditional energy-based approaches in PCM meanwhile reduces significantly the number of operation per unit of time. |
| format | Article |
| id | doaj-art-7eb3de7dc3284eea9530e6aea6b56ac9 |
| institution | Kabale University |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2017-03-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-7eb3de7dc3284eea9530e6aea6b56ac92025-08-20T03:57:08ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2017-03-0142210.1515/aoa-2017-0028Impulsive Sound Detection Directly in Sigma-Delta DomainIgor Dantas dos Santos MIRANDA0Antonio C. de C. LIMA1Federal University of BahiaFederal University of BahiaRecent implementations of Sigma-delta converters have achieved low cost, low power consumption and high integration while maintaining resolution as high as in Nyquist-rate converters. However its usage implies on a pre-processing stage to demodulate the source signal delivered from Sigma-delta modulation to Pulse-Code Modulation (PCM). This work proposes an algorithm based on Discrete Cosine Transform for impulsive signal detection to be applied directly on modulated Sigma-delta bitstream, targeting to reduce computational cost in acoustic event detection applications such as gunshot recognition systems. From pre-recorded impulsive sounds in Sigma-delta format, it has been shown that the new method presents similar error rate in comparison with traditional energy-based approaches in PCM meanwhile reduces significantly the number of operation per unit of time.https://acoustics.ippt.pan.pl/index.php/aa/article/view/1904impulsive signal detectionsigma-delta modulationdiscrete cosine transform |
| spellingShingle | Igor Dantas dos Santos MIRANDA Antonio C. de C. LIMA Impulsive Sound Detection Directly in Sigma-Delta Domain Archives of Acoustics impulsive signal detection sigma-delta modulation discrete cosine transform |
| title | Impulsive Sound Detection Directly in Sigma-Delta Domain |
| title_full | Impulsive Sound Detection Directly in Sigma-Delta Domain |
| title_fullStr | Impulsive Sound Detection Directly in Sigma-Delta Domain |
| title_full_unstemmed | Impulsive Sound Detection Directly in Sigma-Delta Domain |
| title_short | Impulsive Sound Detection Directly in Sigma-Delta Domain |
| title_sort | impulsive sound detection directly in sigma delta domain |
| topic | impulsive signal detection sigma-delta modulation discrete cosine transform |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/1904 |
| work_keys_str_mv | AT igordantasdossantosmiranda impulsivesounddetectiondirectlyinsigmadeltadomain AT antoniocdeclima impulsivesounddetectiondirectlyinsigmadeltadomain |