speech secure

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Published on April 1, 2008

Author: Atzmon_ghilai

Source: authorstream.com

Slide 1: 1 Overview Jürgen Boving, 21-Sep-2005 Version 3.1 Agenda : 2 Agenda Speaker Verification – What’s it all about ? SpeechSecure - Products and Versions SpeechSecure 3.1 – Overview, Architecture, Features Questions and Answers Speaker Verification : 3 Speaker Verification Speech Biometrics Overview : 4 Speech Biometrics Overview Collect one or more recordings known to come from a specific individual Extract features that capture salient characteristics of that individual’s speech Save features as a unique “voiceprint” for future reference Collect speech from an unknown individual Extract features, just as during enrollment Compare features to oneor more voiceprints Determine which, if any, voiceprint matches best Enrollment Phase Authentication Phase Speech Biometrics Taxonomy : 5 Speech Biometrics Taxonomy Do we know who the caller claims to be?(e.g., using their account number) Does authentication require a fixed password? Speaker Verification Accuracy : 6 Speaker Verification Accuracy System can be biased to favor False Accepts (higher convenience) or False Rejects (higher security) Equal Error Rate (EER) is determined when the number of False Accepts and False Rejects are equal EER can be a helpful guide for comparisons but is rarely the best operating point for an application False Accept False Reject Correct Correct Imposter Enrollee Caller is… Granted Access Refused Access Caller is… Architecture : 7 Architecture SOAP Client Application SpeechSecure Server 3.1 HTTP / SOAP Voice model database 3rd Party DB Server SpeechSecure 3.1 Java API & sample code Web Server VXML Application Java API and sample code cannot replace OSDMbut help OSDM customers migrate to SpeechSecure 3.1. Tomcat Appl. Server Web Server HTTP utterance files (audio data) SpeechSecure Server fetches utterance through HTTP. Also possible: send audio data as DIME attachment to SOAP message (using Java API). Two integration methods are shown:either use JavaAPI or SOAP directly. Architecture (2) : 8 Architecture (2) HTTP / SOAP Web Server VXML Application Java API & sample code VXML/JSPs forverification tasks (Derived from)JSP sample code SOAP “wrapper“;providing Java methods on the client side that map to SOAP API messages

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