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Voice Morpher

In: Computers and Technology

Submitted By saikatsaha
Words 279
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VOICE MORPHER The Design Principles Used:
The Voice Morpher has been designed by taking the synthesizer implemented in previous assighnment as the starting point . The term ‘voice morphing’ refers to the process of modifying a speaker’s (source)speech to sound as if it were spoken by a different (target) speaker. An attempt has been made to alter the means and variances of each of the 12 controlling parameters (and overall timing) in such a way as to match those of a target speaker.A separate object pd compute is included to calculate the Mean and Variance of the pfs file and supplied to the morpher code. The morpher should takes three inputs: (i) the pfs file for the source speaker, (ii) the statistics file for the source speaker and (iii) the statistics file for the target speaker. It should then transform the input pfs (in real-time) and output the converted speech.

The Evaluation Procedures Employed :
The Voice Morpher is tested using the test samples ’sentences_male.pfs’ and ‘sentences_female.pfs’ .This is passed as input to the Vocoder Analyser for the source speaker to transform the input pfs using some mathematical formula .The converted speech is then output by passing it through the vocoder synthesiser.(using the source and target means and variances as constants).It is to be noted that the pitch of a female speaker would be close to twice that of the male speaker. i.e., if the constant is 0.2, then the morphed signal will be closer in pitch to the source signal and if it is say some 0.8,then the value will be closer in pitch to the target signal.…...

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