Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1998-02-18
2000-07-11
Bost, Dwayne D.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455343, 704215, H04B 138
Patent
active
060886013
ABSTRACT:
It is judged before encoding sound data whether one frame of the sound data for transmission is silent, and if judged as silent, switching circuits 202 and 203, which is for stopping/resuming electric power supply to a circuit 201 for encoding the sound data, are turned off by a power control circuit 30A during an encoding period of one frame. The power control circuit 30A consists of a counter 32 initialized by a frame synchronization pulse FSYNC and counting a sound sampling clock CLKS, a constant setting part 34, a comparator 33 activating a coincident signal EQ when a count of the counter 32 coincides with a set value, and a flip-flop 31 set by a no-voice detect pulse NOV and reset when EQ is activated.
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Bost Dwayne D.
Fujitsu Limited
Trinh Sonny
LandOfFree
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