Patent ID: 7499855

Claim:
An apparatus, realizing an electronic system for a Delay Free Noise Suppression operating on analog electric input signals from a sound sensor as physical input device and delivering analog electric output signals to a sound actor as physical output device, hereby digitally processing noisy sound signals and especially noisy speech signals, comprising: a first circuit block, wherein said electric input signal as analog input signal x(t), representing a noise polluted sound signal in time t, is continuously converted into a digital input data stream x(n) of noisy sound samples, with n as running counter index; a second circuit block containing a digital signal processing system processing said digital data stream x(n) of noisy sound samples using a method for ‘delay free’ noise suppression or noise cancelation for speech signals with Sample-Wise Discrete Cosine Transformation DCT and Spectral Minimum Detection SMD with Noise Gain Factors NGF producing a digital output data stream s(n), said method comprising: a Sample-Wise Discrete Cosine Transformation algorithm part a Spectral Minimum Detection SMD with Noise Gain Factors NGF algorithm part an Inverse Sample-Wise Discrete Cosine Transformation algorithm part; and a third circuit block, reconverting back said processed digital output data stream s(n) of noise canceled sound samples, representing a noise canceled sound signal, into an analog output signal s(t), which is, in form of an electric signal a noise free sound or speech output signal for said sound actor.