High quality time-scaling and pitch-scaling of audio signals

IN ONE ALTERNATIVE, AN AUDIO SIGNAL (102) IS ANALYZED USING MULTIPLE PSYCHOACOUSTIC CRITERIA TO IDENTIFY A REGION OF THE SIGNAL IN WHICH THE TIMW SCALING AND/OR PITCH SHIFTING PROCESSING WOULD BE INAUDIBLE OR MINIMALLY AUDIBLE, AND THE SIGNAL (102) IS TIME SCALED AND/OR PITCH SHIFTED WITHIN THAT REG...

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Bibliographic Details
Main Author BRETT G. CROCKETT
Format Patent
LanguageEnglish
Published 13.11.2008
Subjects
ACOUSTICS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MUSICAL INSTRUMENTS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
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Summary:IN ONE ALTERNATIVE, AN AUDIO SIGNAL (102) IS ANALYZED USING MULTIPLE PSYCHOACOUSTIC CRITERIA TO IDENTIFY A REGION OF THE SIGNAL IN WHICH THE TIMW SCALING AND/OR PITCH SHIFTING PROCESSING WOULD BE INAUDIBLE OR MINIMALLY AUDIBLE, AND THE SIGNAL (102) IS TIME SCALED AND/OR PITCH SHIFTED WITHIN THAT REGION. IN ANOTHER ALTERNATIVE, THE SIGNAL IS DIVIDED INTO AUDITORY EVENTS, AND THE SIGNAL IS TIME SCALED AND/OR PITCH SHIFTED WITHIN AN AUDITORY EVENTS. IN A FURTHER ALTENATIVE, THE SIGNAL IS DIVIDED INTO AUDITORY EVENTS, AND THE AUDITORY EVENTS ARE ANALYSED USING A PSYCHOACOUSTIC CRITERION TO IDENTIFY THOSE AUDITORY EVENTS IN WHICH THE TIME SCALING AND/OR PITCH SHIFTING PROCESSING OF THE SIGNAL WOULD BE INAUDIBLE OR MINIMALLY AUDIBLE. FURTHER ALTENATIVES PROVIDE FOR MULTIPLE CHANNELS OF AUDIO.
Bibliography:Application Number: AU20020248431