Method and apparatus for encoding and decoding speech signal pri

Details Method and apparatus for encoding and decoding speech signal pri Method and apparatus for encoding and decoding speech signal pri

1986-12-09

1989-03-28

Shoop, Jr., William M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 37, 381 43, 381 53, G10L 500

Patent

active

048171549

ABSTRACT:
An encoder, decoder and method is provided with each being usable independently of each other for improving the dynamic range of digitized speech signals systems by providing amplitude and frequency components to the digitized signals. The encoder processes a speech signal by first converting the speech signal to a single sideband signal and then passing that signal along two signal paths. The first signal path includes an envelope detector and a digitizing means for forming a first digitized signal having amplitude information. The second signal path includes a clipper, frequency-to-voltage converter and digitizer means for forming a second digitized signal havig frequency information. Both digitized signals may then be transmitted to the decoder for reconstruction or stored for reconstruction at a later time. The signals may be transmitted in parallel or serially using multiplexing techniques.

REFERENCES:
patent: 4477925 (1984-10-01), Avery et al.
patent: 4707857 (1987-11-01), Marley et al.
patent: 4713777 (1987-12-01), Klovstad et al.
patent: 4713778 (1987-12-01), Baker
patent: 4763278 (1988-08-01), Rajasekaran et al.

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