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1
Speech Compression and Synthesis
Berouti, Michael
;
Cosell, Lynn
;
Klovstad, John
;
Makhoul, John
;
Schwartz, Richard
In: DTIC AND NTIS (1979)
Abstract:
This report describes our work for the past year on speech compression and synthesis. We implemented a real-time variable-frame-rate LPC vocoder operating at an average rate of 2000 bits/s. We also tested our mixed- source model as part of the vocoder. To improve the reliability of the extraction of LPC parameters, we implemented and tested a range of adaptive lattice and autocorrelation algorithms. For data rates above 5000 bits/s, we developed and tested a new high-frequency regeneration technique, spectral duplication, which reduces the roughness in the synthetic speech. As part of an overall very-low-rate speech compression system, we designed and implemented a program for phonetic synthesis from diphone templates. The lengthy process of extracting the 3000 needed diphone templates has been half completed.
Keyword:
*SPEECH COMPRESSION
;
*VOCODERS
;
ADAPTIVE SYSTEMS
;
ALGORITHMS
;
CODING
;
COEFFICIENTS
;
Computer Programming and Software
;
COMPUTER PROGRAMS
;
DATA BASES
;
DATA RATE
;
DIGITAL FILTERS
;
Diphones
;
HIGH RATE
;
LINEAR SYSTEMS
;
LPC(Linear Prediction Coding)
;
Non-radio Communications
;
PHONETICS
;
PREDICTIONS
;
REAL TIME
;
SPEECH
;
SYNTHESIS
URL:
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA074497
http://www.dtic.mil/docs/citations/ADA074497
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