METHOD FOR SEARCHING A NOISE MODEL IN NOISY SOUND SIGNALS

摘要

More precisely it is related to noise model in voice signal the invention mainly relates in the noisy environment to noise reduction voice signal, such as in the cockpit of pilot or any other vehicle. This method is to digitize input and handles these signals from noise model to eliminate corresponding noise model as much as possible. Input gates each sampling of continuous pattern P, the noise model of iterative search for good and all carries out input signal itself, search for the noise that N number of continuous pattern (the minimum value N1 and maximum value N2 between N) has expected characteristics, it can be used for noise reduction process input signal by the corresponding samples of storage NxP to constitute noise model, and a new noise model and the storage new noise model found by search to replace previous one or keep previous two models according to reapective features. The model obtains finding what energy content by N number of mode (ratio between energy content is two value S 1/S) closer to each other.