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...http://www.google.fr/patents/US5995553?utm_source=gb-gplus-shareBrevet US5995553 - Encoder/decoder for emergency alert system
