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Processing signals

A technology for processing signals and signals, which is applied in the direction of microphone signal combination, instruments, systems for eliminating unnecessary waves, etc., and can solve problems such as not providing sufficient beamformer distortion

Active Publication Date: 2013-04-24
MICROSOFT TECH LICENSING LLC
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  • Summary
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AI Technical Summary

Problems solved by technology

This method provides a way to regularize the adaptation of the beamformer to obtain slightly better beamformer performance, but it does not provide sufficient means to prevent distortion in the beamformer output

Method used

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Embodiment Construction

[0031] Preferred embodiments of the present invention will be described below, by way of example only.

[0032] In the following embodiments of the invention, techniques are described in which the input to the adaptive beamformer is directionally regularized during the adaptation of the beamformer filter coefficients. The embodiments described below relate to the case where the signal is an audio signal. However, other embodiments relate to the case where the signals are other types of transmission signals, such as generally wideband signals, generally narrowband signals, radar signals, sonar signals, antenna signals, radio waves or microwaves. An identical realization (i.e. a regularized signal) of noise of any particular spectral shape (which in a preferred embodiment could be, for example, white noise) is injected into a copy of the microphone input signal with the difference in signal delay between the microphone input signals (or delay pattern) is the same as the signal ...

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Abstract

A method, a device and a computer program product for processing signals at the device are disclosed. Signals are received, over a range of angles, at a plurality of sensors of the device, the received signals including an interfering signal received from an interfering source location. An interference delay pattern between receipt of signals at the sensors corresponding to receipt of a signal from the interfering source location is determined. A plurality of regularization signals having a delay pattern matching the determined interference delay pattern are generated. The generated regularization signals are used to determine beamformer coefficients to be applied by a beamformer, and the beamformer applies the determined beamformer coefficients to the signals received by the plurality of sensors, thereby generating a beamformer output.

Description

technical field [0001] The invention relates to processing signals received in a device. Background technique [0002] The device may have input means for receiving transmission signals from the surrounding environment. For example, a device may have an audio input such as a microphone, which may be used to receive audio signals from the surrounding environment. For example, a microphone of a user device may receive primary audio signals (such as speech from the user) and other audio signals. The other audio signal may be an interfering audio signal received at the device's microphone, may be received from an interfering source or may be ambient background noise or the microphone's own noise. Interfering audio signals can disrupt the main audio signal received in the device. A device may use received audio signals for many different purposes. For example, where the received audio signal is a voice signal received from a user, the device may process the voice signal to us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10K11/34H04R3/00
CPCH04R3/005G01S3/8086G01S3/86G10K11/34
Inventor K.索伦森P.阿格伦
Owner MICROSOFT TECH LICENSING LLC
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