Patent
1995-07-17
1997-04-22
MacDonald, Allen R.
395 216, 395 223, 395 275, G10L 300
Patent
active
056235755
ABSTRACT:
A method for excitation synchronous time encoding of speech signals. The method includes steps of providing an input speech signal, processing the input speech signal to characterize qualities including linear predictive coding (LPC) coefficients, epoch length and voicing and characterizing the input speech signals on a single epoch time domain basis when the input speech signals comprise voiced speech to provide a parameterized voiced excitation function. The method further includes steps of characterizing the input speech signals for at least a portion of a frame when the input speech signals comprise unvoiced speech to provide a parameterized unvoiced excitation function and encoding a composite excitation function including the parameterized unvoiced excitation function and the parameterized voiced excitation function to provide a digital output signal representing the input speech signal.
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Bergstrom Chad S.
Fette Bruce A.
You Sean S.
Dorvil Richemond
Fliegel Frederick M.
MacDonald Allen R.
Motorola Inc.
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