System for suppressing wind noise
AssigneeQNX Software Systems Limited
InventorsPhillip A. Hetherington, Xueman Li, Pierre Zakarauskas
Life of this patent
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Abstract
A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a noise detector and a noise attenuator. The noise detector detects a wind buffet and a continuous noise by modeling the wind buffet. The noise attenuator dampens the wind buffet to improve the intelligibility of an unvoiced, a fully voiced, or a mixed voice segment.
Claims36
A system for suppressing wind noise from a voiced or unvoiced signal, comprising:
- a noise detector that detects and models a wind buffet from an input signal;
- and
- a noise attenuator electrically connected to the noise detector to substantially remove the wind buffet from the input signal.
A system for detecting wind noise from a voiced and unvoiced signal, comprising:
- a time frequency transform logic that converts a time varying input signal into the frequency domain;
- a background noise estimator coupled to the time frequency transform logic, the background noise estimator configured to measure the continuous noise that occurs near a receiver;
- and
- a wind noise detector coupled to the background noise estimator, the wind noise detector configured to automatically identify and model a noise associated with wind.
A system for suppressing wind noise from a voiced or unvoiced signal, comprising:
- a time frequency transform logic that converts a time varying input signal into the frequency domain;
- a background noise estimator coupled to the time frequency transform logic, the background noise estimator configured to measure the continuous noise that occurs near a receiver;
- a wind noise detector coupled to the background noise estimator, the wind detector configured to fit a line to a portion of an input signal;
- and
- a wind attenuator coupled to the wind noise detector means;
- the wind attenuator being configured to remove a noise associated with wind that is sensed by the receiver.
A method of removing a wind buffet from an input signal comprising:
- converting a time varying signal to a complex spectrum;
- estimating a background noise;
- detecting a wind buffet when a high correlation exists between a line and a portion of an input signal;
- and
- dampening the wind buffet from the input signal.
A method of removing a wind buffet from an input signal comprising:
- converting a time varying signal to a complex spectrum;
- estimating a background noise;
- detecting a wind buffet when a high correlation exists between a line and a portion of an input signal;
- and
- removing the wind buffet from the input signal.
A signal-bearing medium having software that controls a detection of a noise associated with a wind comprising:
- a detector that converts sound waves into electrical signals;
- a spectral conversion logic that converts the electrical signals from a first domain to a second domain;
- and
- a signal analysis logic that models a portion of the sound waves that are associated with the wind.
Dependencies are inferred from the claim text.