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Systems, methods, and apparatus for signal separation

A signal and equipment technology, applied in speech analysis, instruments, etc., can solve problems such as multipath, time delay, and frequency dependence

Active Publication Date: 2010-01-06
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reality capture environments often include effects such as time delays, multipath, reflections, phase differences, echoes, and / or reverberations
Such effects produce convoluted mixtures of source signals that can cause problems with traditional linear modeling methods and can also be frequency dependent

Method used

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  • Systems, methods, and apparatus for signal separation
  • Systems, methods, and apparatus for signal separation
  • Systems, methods, and apparatus for signal separation

Examples

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Embodiment Construction

[0050] The systems, methods, and devices disclosed herein are applicable to processing many different types of signals, including acoustic signals (e.g., speech, sound, ultrasound, sonar), physiological or other medical signals (e.g., electrocardiogram, electroencephalogram, magnetoencephalography) and imaging and / or ranging signals (eg, magnetic resonance, radar, seismometry). Applications for such systems, methods and devices include use in speech feature extraction, speech recognition and speech processing.

[0051] In the following description, the symbol i is used in two different ways. When used as a factor, the symbol i represents the imaginary square root of -1. The symbol i is also used to indicate an index, such as a column of a matrix or an element of a vector. Both uses are common in the art, and a skilled artisan will recognize which of the two uses is desired depending on the context in which each instance of the symbol i occurs.

[0052] In the following desc...

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Abstract

Methods, apparatus, and systems for source separation include a converged plurality of coefficient values that is based on each of a plurality of M-channel signals. Each of the plurality of M-channel signals is based on signals produced by M transducers in response to at least one information source and at least one interference source. In some examples, the converged plurality of coefficient values is used to filter an M-channel signal to produce an information output signal and an interference output signal.

Description

[0001] Claim of priority under 35 U.S.C. §119 [0002] This patent application claims priority to Provisional Application No. 60 / 891,677, filed February 26, 2007, entitled "SYSTEM AND METHOD FOR SEPARATION OF ACOUSTIC SIGNALS." [0003] References to Co-Pending Patent Applications [0004] This patent application is related to the following co-pending patent applications: [0005] Application by Visser et al. on June 9, 2005 and entitled "SYSTEM AND METHOD FOR SPEECH PROCESSING USING INDEPENDENT COMPONENT ANALYSIS UNDER STABILITY RESTRAINTS )” in U.S. Patent Application No. 10 / 537,985; and [0006] International Patent Application No. PCT / US2007 / 004966 by Chan et al., filed February 27, 2007 and entitled "SYSTEM AND METHOD FOR GENERATING A SEPARATED SIGNAL" case. technical field [0007] The present invention relates to signal processing. Background technique [0008] It is possible to capture information signals in environments that inevitably have noise. According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02
CPCG10L21/0272
Inventor 埃里克·维瑟詹国梁玄珍·帕克
Owner QUALCOMM INC
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