28 April 2011 Voice Morphing / Voice Morphing / Speech Speech Transformation Transformation
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28 April 2011
Voice Morphing / Speech Voice Morphing / Speech TransformationTransformation
What is voice morphing?What is voice morphing?
Voice morphing means transition of one speech signal into another one.
Technology developed at the Los Alamos
National Laboratory in New Mexico, USA
by George Papcun .
28 April 2011
What it perform?What it perform?
It is a technique to modify a source speaker's speech to sound as if it was spoken by a target speaker.
Voice morphing enables speech patterns to be cloned.
28 April 2011
Need of voice morphing…Need of voice morphing…
Text To Speech (TTS).
In public speech systems.
For special effects( just like video or image morphing is done ).
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Steps in voice morphing process..Steps in voice morphing process..
Preprocessing.Cepstral Analysis.Warping and Interpolation.Signal Re-estimation
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Preprocessing….Preprocessing….
Pre-Processing Involves processes
like signal acquisition in discrete form
and windowing
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Preprocessing block diagram….Preprocessing block diagram….
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Pitch And Envelope Analysis… Pitch And Envelope Analysis…
This process will extract the pitch.Formant information in the speech
signal.
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Matching and Warping..Matching and Warping..
DTW(Dynamic Time Warping)
It is used to find the best match between the pitch of the two sounds.
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Signal Re-Estimation..Signal Re-Estimation..
Due to signals being transformation into the cepstral domain a magnitude function is used. This results in a loss of phase information in the representation of the data
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Limitations..Limitations..
Lots of normalizing problems. Some applications require extensive
sound libraries. Different languages require different
phonetics. It is very seldom complete.
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Advantages… Advantages…
Allows speech model to be duplicated and an exact copy of a person voice.
Used in a entertainment field.
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Disadvantages…Disadvantages…
Use to pull out the useful information.
It hides the actual identity of the user.
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Application Areas..Application Areas..
Fake telephone conversations as evidence in courts of law.
Powerful battlefield weapon. Provide fake orders to the enemy's troops
appearing to come From their own commanders.
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Future Scope..Future Scope..
Extending the functionality of tool. Create a powerful and flexible morphing
tool. Increased user interaction.
Graphical User Interface could be designed and Integrated to make the package more user-friendly
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It is all about on the topic voice morphing…
THANK YOU!!!!!!
BY:-
ASHISH MISHRA
I.T. 3’RD YEAR
0836313008
28 April 2011
QUESTION?
28 April 2011