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Method and apparatus for voice signal extraction

A technology of audio signal and signal, applied in the field of extracting target audio signal

Inactive Publication Date: 2003-08-13
克拉里提有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] As a result, typical techniques for producing clean audio signals have the disadvantage of not addressing many practical situations that require simultaneous consideration of all circumstances (e.g. overlap in time, overlap in direction of arrival, overlap in spectrum)

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  • Method and apparatus for voice signal extraction
  • Method and apparatus for voice signal extraction
  • Method and apparatus for voice signal extraction

Examples

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Embodiment Construction

[0038] Methods and systems for performing blind signal separation in signal processing systems are disclosed in US Application Serial No. 09 / 445778, entitled "Method and Apparatus for Blind Signal Separation," which is incorporated herein by reference. Also, the signal processing system and method are extended to include state space schemes according to U.S. Application Serial No. 09 / 701920, entitled "Adaptive StateSpace Signal Separation, Discrimination and Recovery Architectures and Their Adaptations for Use in Dynamic Environments," incorporated herein by reference. feedback structure. These pending patents disclose general techniques for signal separation, discrimination and recovery applicable to many types of signals received by sensors capable of registering the type of received signal, and also disclose voice identification systems or voice extraction systems utilizing these signal processing techniques. The process of isolating and obtaining the desired individual voi...

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Abstract

A method is provided for positioning the individual elements of a microphone arrangement including at least two such elements. The spacing among the microphone elements supports the generation of numerous combinations of the signal of interest and a sum of interfering sources. Use of the microphone element placement method leads to the formation of many types of microphone arrangements, comprising at least two microphone elements, and provides the input data to signal processing system for sound discrimination. Many examples of these microphone arrangements are provided, some of which are integrated with everyday objects. Also, enhancements and extensions are provided for a signal separation-based processing system for sound discrimination, which uses the microphone arrangements as the sensory front end.

Description

technical field [0001] The present invention relates to the field of noise reduction in speech based systems. In particular, the invention relates to the extraction of target audio signals from a signal environment. Background technique [0002] Voice-based systems and technologies are becoming commonplace, with some of the more popular configurations being cellular telephones, handheld computing devices and systems that rely on voice recognition functionality. Thus, as speech-based technologies become more commonplace, a major obstacle to the growth and user acceptance of such speech-based technologies are sources of noise or interference that contaminate speech signals and degrade the performance and quality of speech processing results. Current commercial remedies such as noise canceling filters and noise canceling microphones are no longer adequate for many real situations, providing at best limited improvement and sometimes making things worse. [0003] Noise pollutio...

Claims

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Application Information

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IPC IPC(8): G10L15/20G10L21/02G10L21/0208H04R1/40H04R3/00
CPCH04R1/406H04R25/405G10L15/20
Inventor G·埃尔滕
Owner 克拉里提有限公司
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