Auto-alignment of clear voice and low speed digital data signals in a simulcast system
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United States of America Patent
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Nov 24, 1998
Grant Date -
N/A
app pub date -
Sep 28, 1995
filing date -
Sep 28, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a wide band radio frequency (RF) simulcast communications system analog voice signals are distributed in a digitized form over high speed data channels and processed as high speed data. A conventional Ericsson, Inc. EDACS.TM. simulcast communications system is improved by altering the apparatus and manner by which 'clear voice' (unencrypted analog voice) is distributed from a control point and 'aligned' at multiple transmitter sites for simultaneous RF broadcasting. In the improved arrangement, the EDACS.TM. simulcast system inherent digital data stream alignment process produces the requisite time domain alignment for the digitized 'clear voice' signals without the need for costly analog audio alignment procedures and equipment.
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