CALL CLASSIFICATION THROUGH ANALYSIS OF DTMF EVENTS
First Claim
1. A computer-implemented method to classify a call, the computer-implemented method comprising:
- receiving dual-tone multifrequency (DTMF) information from a call;
determining a feature vector based on the DTMF information;
comparing the feature vector to a model; and
classifying the call based on the comparison of the feature vector to the model.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods, and computer-readable media for call classification and for training a model for call classification, an example method comprising: receiving DTMF information from a plurality of calls; determining, for each of the calls, a feature vector including statistics based on DTMF information such as DTMF residual signal comprising channel noise and additive noise; training a model for classification; comparing a new call feature vector to the model; predicting a device type and geographic location based on the comparison of the new call feature vector to the model; classifying the call as spoofed or genuine; and authenticating a call or altering an IVR call flow.
5 Citations
33 Claims
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1. A computer-implemented method to classify a call, the computer-implemented method comprising:
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receiving dual-tone multifrequency (DTMF) information from a call; determining a feature vector based on the DTMF information; comparing the feature vector to a model; and classifying the call based on the comparison of the feature vector to the model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 33)
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15. A computer-implemented method to train a model for call classification, the computer-implemented method comprising:
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receiving dual-tone multifrequency (DTMF) information from a plurality of calls; determining, for each of the calls, a feature vector based on the DTMF information of the call; and training a model on the feature vectors. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification