Patent ID: 11869511
Assignee: CISCO TECHNOLOGY, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 8:
9. An apparatus, comprising:
a network interface configured to enable network communications;
one or more processors; and
one or more memories storing instructions that when executed configure the one or more processors to perform operations comprising:
establishing a conference session with a plurality of participant user devices;

receiving, via the conference session, a digitized audio signal from a participant user device of the plurality of participant user devices;
establishing a user account identity associated with the participant user device;
determining reference speech mannerism features using a plurality of speech classifiers configured to evaluate multiple distinct features of speech mannerisms extracted from of one or more digitized audio signals generated by a particular individual associated with the user account identity;
converting the digitized audio signal to text;
generating, based on the text, observed speech mannerism features that are exhibited by the digitized audio signal using the plurality of speech classifiers;
determining a similarity measure between the reference speech mannerism features and the observed speech mannerism features based on a number of instances and a frequency of occurrence of respective features of the multiple distinct features in the observed speech mannerism features compared to the reference speech mannerism features;
validating an integrity of the digitized audio signal based on the similarity measure; and
selectively maintaining the participant user device in the conference session based on the validating,

wherein determining the similarity measure includes at least:
identifying a first feature of the multiple distinct features evaluated by the plurality of speech classifiers; and
applying a mismatch frequency weight to the similarity measure as a scaling factor when the frequency of the first feature in the observed speech mannerism features does not correspond with a frequency of the first feature in the reference speech mannerism features associated with the user account identity.