I am in a intention of Porting Voice Activity Detection algorithm in real time hardware,so i was successful in classifying speech and silence/noise but now the problem is replacement of silence frames with comfort noise(preferebly any stationary noise)
so can any one suggest any opensource CNG algorithms or how a comfort noise can be of any type(pink,white etc)
to do this usually we use a rand() functions but where as these type of functions are not available with real time DSP so how to port such type of Algorithms?