User Interface Service Software Developerís Guide - Hitech Projects

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January 2008 Public Then the collection of training data is starting. The Application displays a predefined phrase and asks user to repeat it while it records his speech and creates a audio file in the userId\Train folder named after the userID and the particular phrase number: i.e. mary1.pcm to Mary10.pcm. The training sentences as well as the threshold sentences are defined in the C:\Amigo\sr\TrainingPrompts.txt file. For the purposes of this demo the “Cycles of Heaven” of Edgar Allan Poe is used. When all 10 training sentences are collected the user is asked to speak additional 4 sentences for thresholds calculation. These sentences are stored userId\Thresh folder named after the userID and the particular phrase number: i.e. mary1.pcm to Mary4.pcm. When the process of collecting threshold data also finishes the application asks confirmation for starting produce the new voice print model and the thresholds for the particular user. Amigo IST-2004-004182 37/114
January 2008 Public On a successful voice print production the model of the new speaker is added in the C:\Amigo\sr\Codebooks folder and information for this speaker is included in the SpkSettings.cfg configuration file. For now on the new speaker voiceprint can be used for performing verification and identification tasks as described in the next sections. 1.4.1.4 Run Identifier Demo Application Identifier application is implemented to demonstrate the use of SpeakerRecognition service for identifying a speaker’s identity. Launch the application by executing the Identifier.exe located in C:\Amigo\sr\SpeakerRecognition\Identifier\bin\Release\. SpeakerRecognition service should be run because the application tries to discover the service and use it. As soon as the application finds the SpeakerRecognition service it starts a loop, asking user to record some speech input (i.e. one utterance). The WaveIO.dll library is used for capturing a 6 seconds speech input and storing it into the C:\Amigo\recordings directory with a unique file name: recFileURL = myWaveIO.CaptureMic(6); Amigo IST-2004-004182 38/114
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