Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1983-10-24
1988-07-12
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
360 13, 369 83, G10L 500
Patent
active
047575409
ABSTRACT:
A method for determining an acceptacle splice point is provided to facilitate splicing of a first segment of an audio signal to a second segment thereof. According to the method, an audio signal is converted into a sequence of samples and first and second edit points are selected along the sequence. The first edit point represents a nominal ending point of the first audio segment, and the second edit point represents a nominal starting point of the second audio segment. According to the method, a plurality of samples in a correlation window following the first edit point are weighted and correlated with a plurality of weighted samples in a correlation window following the second edit point for each position of the second edit point. The position of the second edit point is then shifted to the next sample in the sequence. After the correlation is calculated for each position of the second edit point, the location of an acceptable splice point can be determined. Specifically, if an average magnitude difference function (AMDF) is utilized for the correlation, the position of an acceptable splice point is that position of the second edit point which produces a minimum AMDF. However, if a cross correlation function (CCF) is utilized for the correlation, the position of an acceptable splice point is that position of the second edit point which produces a maximum CCF.
REFERENCES:
patent: 3369077 (1968-02-01), French et al.
patent: 4464784 (1984-08-01), Agnello
patent: 4586137 (1986-04-01), Frost, Jr. et al.
Rabiner, L., Digital Processing of Speech Signals, Prentice Hall 1978, pp. 147-149.
Crowder, Jr. Albert M.
E-Systems Inc.
Kemeny Emanuel S.
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