VOICE ACTIVITY DETECTOR AND VALIDATOR FOR NOISY ENVIRONMENTS

摘要

A communication unit 100 includes an audio processing unit 109 having a voice activity detection mechanism 130, 135. The voice activity detection mechanism 130, 135 measures an energy acceleration of a singal input to the communication unit 100 and determines whether said input signal is speech or noise, based on said masurement. A method of detecting voice and a method of deciding whether an input signal is voice or noise are also described.Using an energy acceleration based voice activity detector and validator, particularly for noisy environments, provides the advantages of noise robustness, fast response and independence of the level of input speech.