Patent ID: 8422696

Claim:
A noise removal apparatus to receive a signal comprising a first and a second voice signal and including a first microphone mounted close to a speaker and at least one second microphone spaced a predetermined distance from the first microphone, comprising: a first and second frequency domain conversion units to convert the first and the second voice signal mixed with noise to frequency domain signals when the first and second voice signals are input from each of the microphones; a bin comparator to determine a voice section and a noise section using each of the converted first and second voice signals and to determine whether a current section of the signal is the voice section or the noise section using each of the converted first and second voice signals; a subtraction unit to subtract a voice signal component from the converted second voice signal; a noise clustering unit to determine, based on a result of the determination by the bin comparator, the noise type of the second voice signal, in which the voice signal component has been subtracted in the noise section; and a noise removal algorithm unit to remove noise corresponding to the noise type from the converted first voice signal.