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NAVAL RESEARCH LAB WASHINGTON DC (16)
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Simple Search
Hits 1 – 16 of 16
1
Speech Analysis and Synthesis Based on Pitch-Synchronous Segmentation of the Speech Waveform.
Kang, George S.
;
Fransen, Lawrence J.
In: DTIC AND NTIS (1994)
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2
Template Based Low Data Rate Speech Encoder
Fransen, Lawrence
In: DTIC AND NTIS (1993)
Abstract:
The 2400-b/s linear predictive coder (LPC) is currently being widely deployed to support tactical voice communication over narrowband channels. However, there is a need for lower-data-rate voice encoders for special applications: improved performance in high bit-error conditions, low- probability-of-intercept (LPI) voice communication, and narrowband integrated voice/data systems. An 800-b/s voice encoding algorithm is presented which is an extension of the 2400-b/s LPC. To construct template tables, speech samples of 420 speakers uttering 8 sentences each were excerpted from the Texas Instrument - Massachusetts Institute of Technology (TIMIT) Acoustic-Phonetic Speech Data Base. Speech intelligibility of the 800-b/s voice encoding algorithm measured by the diagnostic rhyme test (DRT) is 91.5 for three male speakers. This score compares favorably with the 2400-b/s LPC of a few years ago.
Keyword:
*CODERS
;
*TACTICAL COMMUNICATIONS
;
*TEMPLATES
;
*VOICE COMMUNICATIONS
;
ACOUSTICS
;
ALGORITHMS
;
CHANNELS
;
CODING
;
DATA BASES
;
DATA RATE
;
ERRORS
;
INTELLIGIBILITY
;
LOW RATE
;
MASSACHUSETTS
;
MULTIPLEXING
;
NARROWBAND
;
PARAMETERS
;
PHONETICS
;
PROBABILITY
;
QUANTIZATION
;
RATES
;
REAL TIME
;
SPEECH
;
SPEECH ANALYSIS
;
SYNTHESIS
;
TEST AND EVALUATION
;
Voice Communications
URL:
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA270900
http://www.dtic.mil/docs/citations/ADA270900
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3
Vocabulary Synthesis Based on Line Spectrum Pairs
Everett, Stephanie S.
In: DTIC AND NTIS (1989)
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4
Evaluating the Performance of the LPC (Linear Predictive Coding) 2.4 kbps (Kilobits per second) Processor with Bit Errors Using a Sentence Verification Task.
Schmidt-Nielsen, Astrid
;
Kallman, Howard J
In: DTIC AND NTIS (1987)
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5
Intelligibility of ICAO (International Civil Aviation Organization) Spelling Alphabet Words and Digits Using Severely Degraded Speech Communication Systems. Part 1. Narrowband Digital Speech.
Schmidt-Nielsen,Astrid
In: DTIC AND NTIS (1987)
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6
Activities as an ONT Postdoctoral Fellow.
Kallman, Howard J
In: DTIC AND NTIS (1987)
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7
Parameters for Automatic Speaker Recognition over LPC (Linear Predictive-Coding) Systems.
Everett,Stephanie S.
In: DTIC AND NTIS (1986)
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8
Speaker Recognition Using Phoneme Specific Sentences.
Schmidt-Nielsen,Astrid
In: DTIC AND NTIS (1986)
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9
Automatic Speaker Recognition over Military Communication Systems. A Feasibility Evaluation.
Everett,S S
In: DTIC AND NTIS (1985)
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10
The Effect of LPC (Linear Predictive Coding) Processing on the Recognition of Unfamiliar Speakers.
Schmidt-Nielsen,Astrid
;
Stern,Karen R
In: DTIC AND NTIS (1985)
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11
Automatic Speaker Recognition for Military Applications: Applications Survey and Operational Requirements.
Everett,S S
In: DTIC AND NTIS (1985)
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12
Identification as a Function of Familiarity for Known Voices Talking Over an Unprocessed Channel and an LPC (Linear Predictive Coding) Voice Processor.
Schmidt-Nielsen,A
;
Stern,K R
In: DTIC AND NTIS (1984)
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13
Isolated-Word Speech Recognition Using Multi-Section Vector Quantization Code Books.
Burton,D K
;
Shore,J E
;
Buck,J T
In: DTIC AND NTIS (1984)
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14
Controlled Test Procedures for Using Intervocalic Consonants to Assess Speech Intelligibility: A Feasibility Study.
Schmidt-Nielsen,Astrid
In: DTIC AND NTIS (1983)
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15
Automatic Translation of English Text to Phonetics by Means of Letter- to-Sound Rules
Elovitz, Honey S.
;
Johnson, Rodney W.
;
McHugh, Astrid
...
In: DTIC AND NTIS (1976)
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16
PITCH VARIATIONS IN VOCODED VOICE
Jewett, W. M.
In: DTIC AND NTIS (1966)
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