Method and apparatus for pitch tracking

摘要

In a method for tracking pitch in a speech signal, first and second window vectors are created from samples taken across first and second windows of the speech signal. The first window is separated from the second window by a test pitch period. The energy of the speech signal in the first window is combined with the correlation between the first window vector and the second window vector to produce a predictable energy factor. The predictable energy factor is then used to determine a pitch score for the test pitch period. Based in part on the pitch score, a portion of the pitch track is identified.