Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1995-04-26
1997-12-16
Bost, Dwayne
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
375222, H04Q 720
Patent
active
056994052
ABSTRACT:
A communication information signal from a portable radiophone is concurrently decoded by two decoder units to decode data and voice signals. A data signal portion of the information signal is decoded by a data decoder and then a data signal sensor decides whether or not the decoded signal is a normal data signal. Only the normal signal is fed to a signal converter to conduct a code conversion. The resultant signal is outputted from a transmitter circuit. On the other hand, a voice signal portion of the information signal is decoded by a voice decoder and then a voice signal sensor determines whether or not the decoded signal is a normal voice signal. Only the normal signal is sent to a digital-to-analog converter to be transformed into an analog voice signal. Validity of the decoded signal is verified according to, for example, variation in a frequency band and/or amplitude of the decoded signal. Due to the concurrent decoding operation, data and voice signals are efficiently decoded by one modem card at a high speed. There is hence configured a modem card for a portable radiophone capable of concurrently sending data and voice signals to the information terminal.
REFERENCES:
patent: 4377860 (1983-03-01), Godbole
patent: 5359644 (1994-10-01), Tanaka et al.
patent: 5365576 (1994-11-01), Tsumura et al.
patent: 5559792 (1996-09-01), Bottoms et al.
patent: 5594952 (1997-01-01), Virtuoso et al.
"Newton's Telecom Dictionary", 8th. ed., Harry Newton, pp. 659-660, Nov. 1994.
Bost Dwayne
NEC Corporation
Trost William G.
LandOfFree
Modem card for portable radiophone does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modem card for portable radiophone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modem card for portable radiophone will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-214485