AUDIO SIGNATURE EXTRACTION AND CORRELATION

摘要

A signature is extracted from the audio of a program
received by a tunable receiver such that the signature
characterizes the program. In order to extract the signature, blocks of
the audio are converted to corresponding spectral moments. At
least one of the spectral moments is then converted to the
signature. Also, a test audio signal from a receiver is
correlated to a reference audio signal by converting the test audio
signal and the reference audio signal to corresponding test and
reference spectra, determining test slopes corresponding to
coefficients of the test spectrum and reference slopes
corresponding to coefficients of the reference spectrum, and comparing
the test slopes to the reference slopes in order to determine a
match between the test audio signal and the reference audio
signal.