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A NEW FAMILY OF LOW OVERHEAD ERROR REDISTRIBUTING (LOER) CODING TECHNIQUES WILL…

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
1788
Program Year/Program:
1984 / SBIR
Agency Tracking Number:
1788
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Time & Space Processing Inc.
3410 Central Expressway Santa Clara, CA 95051
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1984
Title: A NEW FAMILY OF LOW OVERHEAD ERROR REDISTRIBUTING (LOER) CODING TECHNIQUES WILL BE EXPLORED.
Agency: NASA
Contract: N/A
Award Amount: $49,680.00
 

Abstract:

A NEW FAMILY OF LOW OVERHEAD ERROR REDISTRIBUTING (LOER) CODING TECHNIQUES WILL BE EXPLORED. CODES IN THIS FAMILY INTRODUCE A SMALL BIT ERROR RATE BUT CONCENTRATE THE TRANSMISSION BIT ERRORS ON SOME OF THE BITS WHILE SHIELDING CERTAIN OTHER BITS. THIS LOER CODING TECHNIQUE IS COMBINED WITH A DATA QUALITY INDICATOR (DQI) SIGNAL FROM THE MODEM TO YIELD AN ALGORITHM FOR TRANSMISSION OF LINEAR PREDICTIVE CODING (LPC) SPEECH OVER FADING MOBILE SATELLITE CHANNELS. THIS ALGORITHM USES LOER CODING TO MINIMIZE THE EFFECT OF BIT ERRORS AND THE DQI SIGNAL TO TRIGGER INTER-FRAME SMOOTHING OF LPC MODEL PARAMETERS. THE LOER CODING SCHEME IS IMPLEMENTED IN A REAL TIME VOICE DIGITIZER. THE DQI SIGNAL IS IMPLEMENTED IN A MOBILE SATELLITE MODEM. THESE DEVICES ARE INTERFACED AND THE OVERALL EFFECT OF THE ERROR PROTECTION ALGORITHMS IS MEASURED IN ACTUAL LISTENING TESTS.

Principal Investigator:

Lon radin
INVESTIGATOR
0

Business Contact:

Small Business Information at Submission:

Time & Space Processing Inc.
3410 Central Expressway Santa Clara, CA 95051

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No