Accession Number : ADD017906

Title :   Method and Apparatus for Segmenting a Speech Waveform.

Descriptive Note : Patent Application, Filed 7 Nov 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kang, George S ; Fransen, Lawrence J

PDF Url : ADD017906

Report Date : 07 Nov 1995

Pagination or Media Count : 58

Abstract : A system that synchronously segments a speech waveform using pitch period and a center of the pitch waveform. The pitch waveform center is determined by finding a local minimum of a centroid histogram waveform of the low-pass filtered speech waveform for one pitch period. The speech waveform can then be represented by one or more of such pitch waveforms or segments during speech compression, reconstruction or synthesis. The pitch waveform can be modified by frequency enhancement/filtering, waveform stretching/shrinking in speech synthesis or speech disguise. The utterance rate can also be controlled to speed up or slow down the speech.

Descriptors :   *PATENT APPLICATIONS, *ACOUSTIC WAVES, *SPEECH ANALYSIS, *SOUND PITCH, COMPUTER PROGRAM DOCUMENTATION, SIGNAL PROCESSING, OPTIMIZATION, WAVEFORMS, INPUT OUTPUT PROCESSING, RESONANT FREQUENCY, ACOUSTIC SIGNALS, SPEECH RECOGNITION, SPEECH TRANSMISSION, DATA COMPRESSION, ACOUSTIC FILTERS, SUBROUTINES, AMPLITUDE, DISCRETE FOURIER TRANSFORMS, LOW PASS FILTERS, PHASE MODULATION, PHASE SHIFT, SPEECH COMPRESSION

Subject Categories : Acoustics
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE