PCM subcode communications technique between a regional radio tr

Details PCM subcode communications technique between a regional radio tr PCM subcode communications technique between a regional radio tr

1994-02-28

1996-05-07

Chin, Stephen

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

345242, 349 58, 455 541, H04B 1404

Patent

active

055153976

ABSTRACT:
In a radiotelephone network, processing steps previously applied to digital voice transmissions received by a regional radio transmitter/receiver but not applied to analog voice transmissions received by the transmitter/receiver are applied to such analog voice transmissions at the transmitter/receiver itself such that analog voice transmissions and digital voice transmissions may be transmitted identically between the regional radio transmitter/receiver and a regional switching center. In particular, a digital speech encoder/compressor and a corresponding digital speech decoder/decompressor (together referred to as a codec) provided at remote transmitter/receivers and the regional switching center are also provided at the regional radio transmitter/receiver so as to apply the same processing to analog voice transmissions received from the remote transmitter/receivers as is applied to digital voice transmissions at the remote transmitter/receivers.

REFERENCES:
patent: 3922497 (1975-11-01), Artom et al.
patent: 4041393 (1977-08-01), Reed
patent: 4131849 (1978-12-01), Freeburg et al.
patent: 4143242 (1979-03-01), Horiki
patent: 4377860 (1983-03-01), Godbole

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