Noise suppression apparatus and method

A noise suppression unit comprising:

• a sampler having an input coupled to receive a signal that includes noise and an output that provides a plurality of digital information samples that correspond to the signal;
• an accumulator having an input that receives the plurality of digital information signals and having an output that provides a predetermined number of the digital information samples as a set;
• an extender having an input that receives the set and an output that provides an extended set comprising at least one digital representation of silence attached to the beginning of the set;
• a Fourier transform unit having an input that receives the extended set and an output that provides a set of frequency domain coefficients;
• a scaler having an input that receives the set of frequency domain coefficients and an output that provides a set of scaled frequency domain coefficients;
• an inverse Fourier transform unit having an input that receives the set of scaled frequency domain coefficients and an output that provides a set of time domain samples;
• an alignment unit having an input that receives the set of time domain samples, a first output, and a second output that provides at least one pair of overlapping time domain samples, wherein one pair of the at least one pair of overlapping time domain samples comprises one sample of the set of time domain samples and one sample of a previously formed set of time domain samples;
• an adder having an input that receives the at least one pair of overlapping time domain samples and an output that provides at least one composite time domain sample;
• an output unit having a first input that receives the at least one composite time domain sample, a second input that receives non-overlapping time domain samples from the first output of the alignment unit, and an output that provides the non-overlapping time domain samples and the at least one composite time domain sample as a noise suppressed version of the signal.