Invention Grant
US08693703B2 Method of combining at least two audio signals and a microphone system comprising at least two microphones
有权
组合至少两个音频信号的方法和包括至少两个麦克风的麦克风系统
- Patent Title: Method of combining at least two audio signals and a microphone system comprising at least two microphones
- Patent Title (中): 组合至少两个音频信号的方法和包括至少两个麦克风的麦克风系统
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Application No.: US12989916Application Date: 2008-05-02
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Publication No.: US08693703B2Publication Date: 2014-04-08
- Inventor: Martin Rung
- Applicant: Martin Rung
- Applicant Address: DK
- Assignee: GN Netcom A/S
- Current Assignee: GN Netcom A/S
- Current Assignee Address: DK
- Agency: Altera Law Group, LLC
- International Application: PCT/DK2008/000170 WO 20080502
- International Announcement: WO2009/132646 WO 20091105
- Main IPC: H04R3/00
- IPC: H04R3/00

Abstract:
A method of combining at least two audio signals for generating an enhanced system output signal is described. The method comprises the steps of: a) measuring a sound signal at a first spatial position using a first transducer, such as a first microphone, in order to generate a first audio signal comprising a first target signal portion and a first noise signal portion, b) measuring the sound signal at a second spatial position using a second transducer, such as a second microphone, in order to generate a second audio signal comprising a second target signal portion and a second noise signal portion, c) processing the first audio signal in order to phase match and amplitude match the first target signal with the second target signal within a predetermined frequency range and generating a first processed output, d) calculating the difference between the second audio signal and the first processed output in order to generate a subtraction output, e) calculating the sum of the second audio signal and the first processed output in order to generate a summation output, f) processing the subtraction output in order to minimise a contribution from the noise signal portions to the system output signal and generating a second processed output, and g) calculating the difference between the summation output and the second processed output in order to generate the system output signal.
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