音声検出装置、音声会議システムおよび遠隔会議システム

  • Inventors:
  • Assignees: ヤマハ株式会社
  • Publication Date: February 01, 2012
  • Publication Number: JP-4867798-B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voice detection device for accurately detecting speaking voice without responding to noise regardless of the large and small of the noise. <P>SOLUTION: The voice detection device includes two directional microphones, environment noise is substantially equally input to both of the microphones, and a target voice signal (uttered voices of speakers) is input to only one microphone. The voice detection device calculates a level difference D between the voice signals (collected signals) collected by both of the microphones, and calculates a power ratio P. The voice detection device sets threshold values DT1, DT2 (DT1&lt;DT2) on the level difference D, and sets threshold values PT1, PT2 (PT1&gt;PT2) on the power ratio P. The voice detection device determines that the target voice signal is input when any one of D&gt;DT1 and P&gt;PT1 or D&gt;DT2 and P&gt;PT2 is satisfied. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

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