Smart rejecter for keyboard click noise

摘要

According to various embodiments of the invention, a new and effective keyboard click noise reduction scheme is presented. The keyboard click noise reduction scheme may have various processing units including: Dynamic Signal Modeler, Smart Model Selector, Adaptive Filtering Module, Keyboard/Impulse Noise and Voice Activity Detectors, and a Post-Processing Unit. By adaptively changing the coefficients of the proposed adaptive filter through minimizing the output energy, the scheme can provide the target signal/voice with nearly zero keyboard click noise. The scheme could be used in real-time to minimize keyboard click noise or any kind of unwanted noise, especially noise having transient impulse characteristics.

主权项

1. A method for an impulse noise filter to minimize impulse noise in a communication session, comprising:
receiving an audio input from an audio source; determining whether the audio input includes impulse noise; determining whether the audio input includes voice; and generating an audio output by adaptively filtering the audio input based on the determination of impulse noise being included in the audio input and based on the determination of voice being included in the audio input, wherein the adaptive filtering minimizes the impulse noise and maximizes the voice in the audio input, wherein determining whether the audio input includes impulse noise comprises:
applying an impulse noise detection to the audio input in identifying the impulse noise in the audio input, the impulse noise detection being selected from the group consisting of noisy excitation analysis and power estimation analysis; anddetermining whether the identified impulse noise matches an impulse noise sample from a database of impulse noise samples,wherein the audio input includes impulse noise if there is a match, andwherein the audio input does not include impulse noise if there is no match.