System and method for babble noise detection

摘要

at each change of direction , as the sum of the sizes of the gradient (gradient) of the speech signal from the received frames and calculating a gradient index ; The gradient index , energy information , and background noise level exceeds a predetermined threshold , or a voice activity detector algorithm and sound level indicates the multiple cross-talk noise , the frame includes a method of providing an indication that a multiple cross-talk noise , device , system , and computer program . The gradient index is calculated as the sum of each of the direction change when , in the gradient of the received input signal from the speech signal magnitude . Energy information is used to measure how often quite probable any value , which is based on the result divided by the second derivative of signal energy in energy .