Speech encoder

The invention relates to a speech encoder using linear predictive coding and proposes a code comprising the parameters of a linear predictor and an excitation signal consisting of a plurality of pulses of which the timing and the amplitude is selected for each frame of speech. To enable the excitati...

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Bibliographic Details
Main Authors GIDEON ABRAHAM SENENSIEB, ANTHONY JOHN MILBOURN
Format Patent
LanguageEnglish
Published 26.09.1984
Subjects
ACOUSTICS
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MUSICAL INSTRUMENTS
PHYSICS
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
TRANSMISSION
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Summary:The invention relates to a speech encoder using linear predictive coding and proposes a code comprising the parameters of a linear predictor and an excitation signal consisting of a plurality of pulses of which the timing and the amplitude is selected for each frame of speech. To enable the excitation signal pulses for the recursive filter to be evaluated in real time, the speech signal is passed through a pole-zero filter to suppress the effects of reverberations and the output of the filter 38 is correlated with the time weighted impulse response of the recursive filter with the encoded parameters.
Bibliography:Application Number: GB19830006685