Pulse or digital communications – Pulse code modulation
Patent
1997-12-23
2000-03-07
Chin, Stephen
Pulse or digital communications
Pulse code modulation
375219, 375241, 375354, 704212, 704221, H04B 1404
Patent
active
060349948
ABSTRACT:
A method for controlling the point of time when a bypass mode operation is begun, based on the format of pulse code modulation (PCM) data. A switching unit, which is coupled between outgoing-end and incoming-end mobile stations, receives signals output from vocoders respectively associated with the outgoing-end and incoming-end mobile stations, thereby checking respective operation modes of the vocoders. Based on the result of the checking, the switching unit controls the vocoders so that communications between the outgoing-end and incoming-end mobile stations can be enabled when both the mobile stations operate in a bypass mode. Accordingly, it is possible to achieve smooth communications without a degradation in speech quality, as compared to conventional communications methods which do not take into consideration operation modes of outgoing-end and incoming-end mobile stations.
REFERENCES:
patent: 5491719 (1996-02-01), Sellin et al.
patent: 5768308 (1998-06-01), Pon et al.
patent: 5793810 (1998-08-01), Han et al.
patent: 5903862 (1999-05-01), Weaver, Jr. et al.
patent: 5956673 (1999-09-01), Weaver, Jr. et al.
Chin Stephen
Fan Chieh M.
Hyundai Electronics Industries Co,. Ltd.
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