Generalized amplitude interpolation by β-divergence for virtual microphone array

Hiroki Katahira, Nobutaka Ono, Shigeki Miyabe, Takeshi Yamada, Shoji Makino

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

3 Citations (Scopus)

Abstract

In this paper, we present a generalization of the virtual microphone array we previously proposed to increase the microphone elements by nonlinear interpolation. In the previous work, we generated a virtual observation from two actual microphones by an interpolation in the logarithmic domain. This corresponds to a linear interpolation of the phase and the geometric mean of the amplitude. In this paper, we generalize this interpolation using a linear interpolation of the phase and a nonlinear interpolation of the amplitude with adjustable nonlinearity based on β-divergence. Improvement of the array signal processing performance is obtained by appropriate tuning of the parameter β We evaluate the improvement in speech enhancement using a maximum SNR beamformer.

Original languageEnglish
Title of host publication2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages149-153
Number of pages5
ISBN (Electronic)9781479968084
DOIs
Publication statusPublished - 2014 Nov 11
Externally publishedYes
Event2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 - Juan-les-Pins, France
Duration: 2014 Sep 82014 Sep 11

Publication series

Name2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014

Conference

Conference2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
CountryFrance
CityJuan-les-Pins
Period14/9/814/9/11

Keywords

  • array signal processing
  • maximum SNR beamformer
  • speech enhancement
  • virtual microphone

ASJC Scopus subject areas

  • Signal Processing
  • Software
  • Acoustics and Ultrasonics
  • Computer Networks and Communications

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