Encoder/decoder for emergency alert system

Details Encoder/decoder for emergency alert system Encoder/decoder for emergency alert system

1997-01-28

1999-11-30

Chin, Wellington

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

455404, 455521, H04L 2710

Patent

active

059955538

ABSTRACT:
An encoder/decoder for an emergency alert system to enable broadcasters to receive, store, re-broadcast and originate emergency alert messages. Multiple emergency alert signals are received by the encoder/decoder. A digital signal processor of the encoder/decoder scans the reception of the multiple emergency alert messages to determine the presence of an incoming emergency alert signal. The digital signal processor provides digital implementation of a frequency shift key modulation and a frequency shift key demodulation to encode and decode emergency alert messages. Additionally, the digital signal processor functions as a central processing unit to control input/output ports over a digital signal processor bus for performing all encoding and decoding functions and to control all encoding and decoding functions.

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Article by Frederick M. Baumgartner entitled Upgrading The Emergency Broadcast System: published during the year 1993.
Article by TFT, Inc. and submitted by Frederick M. Baumgartner,entitled "Emergency Information System" circulated on Dec. 11, 1992 at a Federal Communication Conference in Washington, D.C.

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