Inventors:
Bruce Robertson - Oracle AZ, US
Thomas Wood - Salt Lake City UT, US
International Classification:
H04L012/66, H04L012/28, H04L012/56
Abstract:
The present invention provides an audio FSK encoded digital data packet embedded in the audio message portion of an EAS protocol transmission, and to methods for encoding and for recognizing and decoding the data packet. A digital audio FSK encoded digital data packet embedded in the audio message portion of an EAS protocol transmission comprises a packet header, control codes, and content data. The data packet header identifies the beginning of the data packet. The control codes provide structural information about the content data segment of the data packet. The content data comprising at least primary text and/or other primary data as described by the control codes, and optionally, containing auxiliary device control data and content encryption data as described by optional control codes, and the end of content data identifying the end of the embedded data packet, all from which an EAS audio FSK decoder may reconstruct the original embedded digital data.