Processor based linked compressor-expander telecommunications sy

Details Processor based linked compressor-expander telecommunications sy Processor based linked compressor-expander telecommunications sy

1988-05-20

1989-06-13

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

333 14, 455 72, H04L 2700

Patent

active

048399060

ABSTRACT:
A digital linked compressor-expander telecommunications system (Lincompex), is implemented using a general purpose digital signal processor wherein the compression and expansion functions are performed by blocks of programmed code. Input audio analog signals are converted to parallel data digital signals thereupon the digitial signals are input for processing. After processing, the resultant signals are passed to a 16-bit digital-to-analog converter where either the compressed or expanded digital voice data signal is converted back into an audio frequency analog signal for either transmission or communication on an output device.

REFERENCES:
patent: 3602818 (1971-08-01), Anderlecht
patent: 4250470 (1981-02-01), Szarvas
patent: 4253072 (1981-02-01), Fisher et al.
patent: 4295223 (1981-10-01), Shutterly
patent: 4539707 (1985-09-01), Jacobs et al.
patent: 4677645 (1987-06-01), Kaniwa et al.
patent: 4700361 (1987-10-01), Todd et al.

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