H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/8
H04M 11/00 (2006.01) H04Q 1/30 (2006.01) H04Q 1/453 (2006.01) H04Q 1/50 (2006.01)
Patent
CA 2022750
ABSTRACT OF THE DISCLOSURE A method and device for recognizing a signature of dialing pulse present in a communication signal isolate from the latter signal the signature. The so isolated signature is correlated with a statistic model obtained from a large number of dialing pulse signatures to determine whether the isolated signature corresponds to a dialing pulse. During this correlation, a first complex function representative of the isolated signature is calculated and correlated with a second complex function representative of the statistic model. The result of the correlation is normalized and whether the isolated signature is a signature of dialing pulse is decided in function of this normalization. The method and device can be used to convert into a tone frequency signal a series of dialing pulse signatures present in the communication signal and corresponding to a dialed digit. Each recognized signature is counted in order to determine the number of signatures in the series and a tone signal having a frequency which is function of this counted number is generated.
Gareau Marc A.
Girard Normand
Lemieux Yves
Ponton Michel
Gareau Marc A.
Girard Normand
Lemieux Yves
Ponton Michel
Teleliaison
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