Patent ID: 9734842
Date: 2017-08-15
CPC Classifications: G10L

Claim:
1. A method of audio source separation from an audio signal comprising a mix of a background component and a speech component, wherein said method is based on a non-negative matrix partial co-factorization, the method comprising: producing a speech example relating to a speech component in the audio signal; converting said speech example and said audio signal to non-negative matrices representing their respective spectral amplitudes; receiving a first set of characteristics of the audio signal and a second set of characteristics of the produced speech example; estimating parameters for configuration of said separation, said received first set of characteristics and said received second set of characteristics being used for modeling mismatches between the speech example and the speech component, said mismatches comprising a temporal synchronization mismatch, a pitch mismatch and a recording conditions mismatch; obtaining an estimated speech component and an estimated background component of the audio signal by separation of the speech component from the audio signal through filtering of the audio signal using the estimated parameters; the first and the second set of received characteristics being at least one of a tessiture, a prosody, a dictionary built from phonemes, a phoneme order, or recording conditions.