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Suppressing noise in an audio signal

An audio signal and noise technology, applied in the field of electronic devices, can solve the problems of distinguishing, difficult noise, audio signal quality degradation, etc.

Inactive Publication Date: 2012-07-04
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such noise is also captured, the quality of the resulting audio signal may be degraded
For example, when using a degraded audio signal to reproduce captured sound, the desired sound may be corrupted and indistinguishable from noise

Method used

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  • Suppressing noise in an audio signal
  • Suppressing noise in an audio signal
  • Suppressing noise in an audio signal

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Embodiment Construction

[0023] As used herein, the term "base station" generally refers to a communication device capable of providing access to a communication network. Examples of communication networks include, but are not limited to, telephone networks (e.g., "landline" networks such as the public switched telephone network (PSTN) or cellular telephone networks), the Internet, local area networks (LANs), wide area networks (WANs), metropolitan Network (MAN) and so on. Examples of base stations include, for example, cellular telephone base stations or nodes, access points, wireless gateways, and wireless routers. Base stations may operate according to certain industry standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac (eg, Wireless Fidelity or "Wi-Fi") standards. Other examples of standards that base stations may comply with include IEEE 802.16 (e.g., Worldwide Interoperability for Microwave Access, or "WiMAX"), Third Gener...

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Abstract

An electronic device for suppressing noise in an audio signal is described. The electronic device includes a processor and instructions stored in memory. The electronic device receives an input audio signal and computes an overall noise estimate based on a stationary noise estimate, a non-stationary noise estimate and an excess noise estimate. The electronic device also computes an adaptive factor based on an input Signal-to-Noise Ratio (SNR) and one or more SNR limits. A set of gains is also computed using a spectral expansion gain function. The spectral expansion gain function is based on the overall noise estimate and the adaptive factor. The electronic device also applies the set of gains to the input audio signal to produce a noise-suppressed audio signal and provides the noise-suppressed audio signal.

Description

[0001] Related applications [0002] This application is related to and claims priority to U.S. Provisional Patent Application No. 61 / 247,888, filed October 1, 2009, entitled "Enhanced Noise Suppression with Single Input Audio Signal" . technical field [0003] The present invention generally relates to electronic devices. More specifically, the invention relates to suppressing noise in audio signals. Background technique [0004] In recent decades, the use of electronic devices has become commonplace. In particular, advances in electronic technology have reduced the cost of increasingly complex and useful electronic devices. Decreasing costs and consumer demand have proliferated the use of electronic devices, making them virtually ubiquitous in modern society. As the use of electronic devices has expanded, a need has arisen for new and improved features of electronic devices. More specifically, electronic devices that perform functions faster, more efficiently, or wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G11B20/24
CPCG10L21/0208G10L21/0232G10L21/02G11B20/24
Inventor 迪内希·拉马克里希南胡马云·沙赫里王松
Owner QUALCOMM INC
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