A novel coherence-function-based noise suppression algorithm by applying sound-source localization and awareness-computation strategy for dual microphones

Shin Chi Lai, Hsu Cheng Lai, Feng Chung Hong, Huan Ru Lin, Sheau Fang Lei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper presents a novel coherence-function-based noise suppression algorithm (NSA) with a weighted overlap-add (WOLA) filter bank design for dual microphones. It solved the following two issues: One is that traditional method cannot efficiently suppress the noise from the front, and the other is that it may cause estimation errors while the noise is from the back. Consider the complexity in algorithm, the proposed method employs a simple sound source localization (SSL) algorithm, and an awareness computation (AC) strategy to improve these drawbacks instead of using complex voice active detector (VAD). By calculating the cross-correlation of dual microphones, the information of time difference of arrival (TDOA) is obtained. Hence, the direction of noise source can be effectively estimated. To reduce the error rate of finding out the exact noise source, an adaptive threshold value is introduced. From the view of system integration, the AC and module-sharing scheme are also adopted to reduce the computational complexity. The results show that the number of multiplication of the proposed method is only 9.09% increased, and the SNR of the proposed algorithm has at least 3dB growth which is higher than that of other approaches. In FPGA implementation, the proposed SSL design can be operated at 25 MHz which is easily to achieve the real-time requirement of 72.625 kHz. Overall, it is very suitable for integrating with Fourier-transform-based WOLA hearing aid design in the future.

Original languageEnglish
Title of host publicationProceedings - 2014 10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2014
EditorsJunzo Watada, Akinori Ito, Chien-Ming Chen, Jeng-Shyang Pan, Han-Chieh Chao
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages313-316
Number of pages4
ISBN (Electronic)9781479953905
DOIs
Publication statusPublished - 2014 Dec 24
Event10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2014 - Kitakyushu, Japan
Duration: 2014 Aug 272014 Aug 29

Publication series

NameProceedings - 2014 10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2014

Other

Other10th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2014
CountryJapan
CityKitakyushu
Period14-08-2714-08-29

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Artificial Intelligence
  • Signal Processing

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