Dial pulse detection method and detector
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United States of America Patent
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Issued Date -
Nov 15, 2007
app pub date -
Apr 25, 2006
filing date -
Apr 25, 2006
priority date (Note) -
Abandoned
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Abstract
A method apparatus and system are provided for detecting pulses in a received signal wherein the spacing between the pulses may alternate in an expected manner. Generally, the method exploits intrinsic characteristics in the ensemble pulses, by performing correlation between pulses in a data stream representative of the received signal. Pulses may be related to an ensemble of pulses if their correlation result complies with a predefined criteria and the spacing between the correlated pulses is substantially the expected spacing. The correlation may be performed between two successive pulses, or it may be performed between non-successive pulses. The pulses may be alternating 'start' and 'stop' pulses of telephonic dial (rotary) pulses, and the expected spacing between the pulses may alternate between two values, 'break' period and 'make' period. Pulses may be correlated if their energy exceeds a predefined threshold value. The pulses may be interpreted to corresponding dialed digit, and a signal representative of the dialed digit may be forwarded to an IVR-enabled system.
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