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Systems, methods, apparatus, and computer-readable media for source localization using audible sound and ultrasound

A device and sound technology, applied in the field of signal processing, can solve problems affecting the performance of spatial selective processing operations

Inactive Publication Date: 2013-12-11
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such cases, the movement of the user's mouth relative to the device can significantly affect the performance of the spatially selective processing operation

Method used

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  • Systems, methods, apparatus, and computer-readable media for source localization using audible sound and ultrasound
  • Systems, methods, apparatus, and computer-readable media for source localization using audible sound and ultrasound
  • Systems, methods, apparatus, and computer-readable media for source localization using audible sound and ultrasound

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Embodiment Construction

[0055] This description contains a disclosure of systems, methods, and apparatus that configure operations for estimating a direction of arrival of an audio frequency component using ultrasonic ranging. This operation may provide more accurate source localization to support better performance of direction-selective audio processing operations.

[0056] Unless expressly limited by context, the term "signal" is used herein to indicate any of its ordinary meanings, including the state of a memory location (or collection of memory locations) expressed on a wire, bus, or other transmission medium. Unless expressly limited by context, the term "generate" is used herein to indicate any of its ordinary meanings, such as computing or otherwise producing. Unless expressly limited by context, the term "calculate" is used herein to indicate any of its ordinary meanings, such as calculating, evaluating, estimating, and / or selecting from a plurality of values. Unless expressly limited by con...

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Abstract

A method of signal processing includes calculating a range based on information from a reflected ultrasonic signal. Based on the calculated range, one among a plurality of direction-of-arrival (DOA) estimation operations is selected. The method also includes performing the selected operation to calculate an estimated direction of arrival (DOA) of an audio-frequency component of a multichannel signal. Examples of DOA estimation operations include operations based on phase differences between channels of the multichannel signal and operations based on a difference in gain between signals that are based on channels of the multichannel signal.

Description

[0001] Claim of priority under 35 U.S.C. §119 [0002] This patent application asserts the 61st patent application titled ROBUST MULTIMICROPHONE TRACKING SYSTEM USING AUDIBLE SOUND AND ULTRASOUND filed on March 3, 2011 and assigned to the present assignee. Priority to Provisional Application No. 448,950. technical field [0003] The present invention relates to signal processing. Background technique [0004] For applications where voice recording (eg, for communication) occurs in a noisy environment, it may be necessary to separate the desired voice signal from background noise. Noise may be defined as the combination of all signals that interfere with or otherwise degrade the desired signal. Background noise may include many noise signals generated within an acoustic environment, such as other people's background conversations, as well as reflections and reverberations generated from any of the desired signal and / or other signals. Unless the desired speech signal is se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/521G01S3/80G01S15/02G01S15/42G01S15/87G01S15/86
CPCG01S3/8006G01S7/521G01S15/42G01S2015/465G01S2013/468G01S15/876G01S15/86G01S3/80G10L17/00
Inventor 埃里克·维瑟布赖恩·莫迈尔
Owner QUALCOMM INC
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