One of the types of objects in Praat. A CrossCorrelationTable represents the cross-correlations between a number of signals. Cell [i,j] of a CrossCorrelationTable contains the cross-correlation between the i-th and the j-th signal. For example, the CrossCorrelationTable of an n-channel sound is a n×n table where the number in cell [i,j] is the cross-correlation of channel i with channel j (for a particular lag time τ).
A CrossCorrelationTable has a square matrix whose cells contain the cross-correlations between the signals and a centroid vector with the average value of each signal.
Sometimes in the statistical literature, the cross-correlation between signals is also called "covariance". However, the only thing a Covariance has in common with a CrossCorrelationTable is that both are symmetric matrices. The differences between a CrossCorrelationTable and a Covariance are:
© djmw, September 8, 2017