Subframe-based correlation

摘要

A subframe-based correlation method for pitch and voicing is provided by finding the pitch track through a speech frame that minimizes pitch prediction residual energy over the frame. The method scans the range of possible time lags T and computes for each subframe within a given range of T the maximum correlation value and further finds the set of subframe lags to maximize the correlation over all of possible pitch lags. <IMAGE>