Dynamic Audibility Enhancement
First Claim
1. A method of enhancing an audio signal comprising the steps of:
- a) receiving a primary audio input signal,b) receiving a detected audio signal which comprises;
A) an echo component derived from play-out of the primary audio input signal andB) a noise component, andc) estimating from the primary audio input signal and the detected audio signal;
1) a set of frequency-specific lower bound gains, such that each frequency-specific lower bound gain, when applied to a respective frequency of the primary audio input signal, would cause the noise component to just mask the echo component at that respective frequency and2) a set of frequency-specific upper bound gains, such that each frequency-specific upper bound gain, when applied to a respective frequency of the primary audio input signal, would cause the echo component to just mask the noise component at that respective frequency;
d) estimating a set of frequency-specific gains in such a way that each frequency-specific gain falls between the respective frequency-specific lower bound gain and respective frequency-specific upper bound gain; and
e) applying the frequency-specific gains to the primary audio input signal.
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Abstract
A method of enhancing an audio signal includes the steps of: a) receiving a primary audio input signal, b) receiving a detected audio signal which comprises: A) an echo component derived from play-out of the primary audio input signal and B) a noise component, and c) estimating from the primary audio input signal and the detected audio signal: 1) a set of frequency-specific lower bound gains, such that each frequency-specific lower bound gain, when applied to a respective frequency of the primary audio input signal, would cause the noise component to just mask the echo component at that respective frequency and 2) a set of frequency-specific upper bound gains, such that, each frequency-specific upper bound gain, when applied to a respective frequency of the primary audio input signal, would cause the echo component to just mask the noise component, at that respective frequency; d) estimating a sat of frequency-specific gains in such a way that each frequency-specific gain falls between the respective frequency-specific lower bound gain and respective frequency-specific upper bound gain; and e) applying the frequency-specific gains to the primary audio input signal.
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Citations
20 Claims
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1. A method of enhancing an audio signal comprising the steps of:
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a) receiving a primary audio input signal, b) receiving a detected audio signal which comprises; A) an echo component derived from play-out of the primary audio input signal and B) a noise component, and c) estimating from the primary audio input signal and the detected audio signal; 1) a set of frequency-specific lower bound gains, such that each frequency-specific lower bound gain, when applied to a respective frequency of the primary audio input signal, would cause the noise component to just mask the echo component at that respective frequency and 2) a set of frequency-specific upper bound gains, such that each frequency-specific upper bound gain, when applied to a respective frequency of the primary audio input signal, would cause the echo component to just mask the noise component at that respective frequency; d) estimating a set of frequency-specific gains in such a way that each frequency-specific gain falls between the respective frequency-specific lower bound gain and respective frequency-specific upper bound gain; and e) applying the frequency-specific gains to the primary audio input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for enhancing an audio signal comprising:
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a primary audio input for receiving a primary audio input signal, a detected audio input for receiving a detected audio signal wherein the detected audio signal comprises; A) an echo component derived from play-out of the primary audio input signal and B) a noise component, and an estimation unit for estimating from the primary audio input signal and the detected audio signal; 1) a set of frequency-specific lower bounds for gains, such that each frequency-specific lower bound gain value, when applied to a respective frequency of the primary audio input signal, would cause the noise component to just mask the echo component at that respective frequency and 2) a set of frequency-specific upper bounds for gains, such that each frequency-specific upper bound gain, when applied to a respective frequency of the primary audio input signal, would cause the echo component to just mask the noise component at that respective frequency; 3) a set of frequency-specific gains estimated in such a way that each frequency-specific gain fails between the respective frequency-specific lower bound and respective frequency-specific upper bound; and a processing unit for applying the frequency-specific gains to the primary audio input signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification