Adjusted noise suppression and voice activity detection

摘要

Dual microphones can be used to improve noise suppression by better distinguishing between speech and background noise. If the user does not hold the handset according to a prescribed orientation, however, the dual microphone noise suppression can actually do a worse job than a single microphone noise suppression algorithm because of mistakes made distinguishing between speech and noise. Here it is proposed to use an accelerometer to determine the orientation of the phone and use this orientation information in the noise suppression algorithm. Also when a person speaks, the vibrations when the device is held against the head can be used to detect speech.

主权项

1. A method of adjusting a noise suppression algorithm in a mobile communication device, the method comprising:
receiving input related to vibration of the mobile communication device from an accelerometer, the vibration of the mobile communication device resulting from the mobile communication device being against a head; processing the input from the accelerometer; adjusting, based on the input, a noise suppression algorithm, thereby producing an adjusted noise suppression algorithm; receiving audio signals; performing the adjusted noise suppression algorithm on the audio signals, thereby producing noise suppressed audio signals, wherein the processing relates to determining a likelihood of a presence of a voice signal in the audio signals; and transmitting the noise suppressed audio signals.