Inverting non-minimum phase FIR transfer functions with application to reverberant speech

The problem of removing reverberation in speech is considered when the room impulse response is non-minimum phase. The method does not require multiple sensors or the use of all-pass transfer function networks as in previous techniques. Instead we use spectral factorization of large polynomials. Spectral factorization gives a method of reflecting the non-minimum phase roots without having to calculate their actual values.