Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Patent
1982-03-05
1984-05-15
Kemeny, E. S. Matt
Electrical audio signal processing systems and devices
Monitoring/measuring of audio devices
Loudspeaker operation
3645135, 381 35, G10L 100
Patent
active
044492332
ABSTRACT:
This system includes an LPC parameter speech synthesizer which basically needs ten binary bits for each LPC coefficient. However, external sources are allowed reduced storage and frame rate requirements by encoding the set of LPC coefficients in a data frame with bit-allocation, repeat-bit, and variable-length features. A three-memory system provides transformation: a speech word selected by controller 11 is transformed by a ROM (30) into an address to a ROM (12 or 13) which outputs corresponding speech data in reduced encoded format to a ROM (202) which converts the coded frame of coefficients to uncoded ten-bit coefficients as needed by the speech synthesizer.
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"A Real-Time Floating Point Variable Frame Rate LPC Vocoder"-Randolph E. Cole and Thomas L. Boynton, IEEE Conference Record on Acoustics, May 9-11, 1977.
Comfort James T.
Hiller William E.
Kemeny E. S. Matt
Sharp Melvin
Texas Instruments Incorporated
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