Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1987-06-03
1989-12-26
Clark, David L.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 702
Patent
active
048903272
ABSTRACT:
An analog to digital converter for a speech signal is implemented in modules to allow for changes in bit rate and changes in bit stream length according to requirements of the digital transmission system. A pre-emphasis circuit provides an array of pre-emphasized speech samples which are stored in memory. A linear predictive coder provides an array of reflection coefficients and an array of filter coefficients. A pulse processor receives the speech samples and filter coefficients and generates speech amplitude and location signals. These signals are multiplied to generate quantized speech samples. The quantized speech samples and reflection coefficients are provided to a buffer which provides an output signal of a proper bit stream length and bit rate for the digital transmission system.
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Bertrand John
Noah Matthew J.
Clark David L.
ITT Corporation
Merecki John A.
Twomey Thomas N.
Werner Mary C.
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