Invention Grant
- Patent Title: Call classification through analysis of DTMF events
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Application No.: US17157848Application Date: 2021-01-25
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Publication No.: US11388490B2Publication Date: 2022-07-12
- Inventor: Nick Gaubitch , Scott Strong , John Cornwell , Hassan Kingravi , David Dewey
- Applicant: PINDROP SECURITY, INC.
- Applicant Address: US GA Atlanta
- Assignee: PINDROP SECURITY, INC.
- Current Assignee: PINDROP SECURITY, INC.
- Current Assignee Address: US GA Atlanta
- Agency: Foley & Lardner LLP
- Main IPC: H04M1/56
- IPC: H04M1/56 ; H04M15/06 ; H04Q3/70 ; H04M3/22 ; H04M7/12 ; H04Q1/45 ; G10L25/51 ; H04L25/02 ; H04M3/493

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.
Public/Granted literature
- US20210152897A1 CALL CLASSIFICATION THROUGH ANALYSIS OF DTMF EVENTS Public/Granted day:2021-05-20
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