Method and apparatus for selectively encoding digital messages i

Details Method and apparatus for selectively encoding digital messages i Method and apparatus for selectively encoding digital messages i

1995-06-29

1997-07-29

Cumming, William

Multiplex communications

Communication over free space

Portable address responsive receiver

34082503, 455 312, 455466, 455 381, H04Q 708

Patent

active

056527837

ABSTRACT:
A communication system providing selective encoding of digital messages (408) comprising a plurality of transmitting devices (116) and a plurality of receiving devices (122). The transmitting devices (116) transmit an encoded address (404), encoded message vector (406) in a first portion of the message, and digital message (408) in a second portion of the message. The digital message (408) is encoded in the second portion of the message with an error correction code if the digital message is a data message (414), and without the overhead of an error correction code if the digital message (408) is a voice message (410). The receiving device (122) decodes the encoded address (404), encoded message vector (406), and digital message (408) transmitted by the transmitting devices (116) in the first and second portion of the message. The receiving device (122) determines the encoding method of the digital message (408) based on the message type received in the message vector (406), and thereafter decodes the digital message.

REFERENCES:
patent: 5117460 (1992-05-01), Berry et al.
patent: 5146214 (1992-09-01), Yamada et al.
patent: 5412719 (1995-05-01), Hamamoto et al.
patent: 5517491 (1996-05-01), Nanni et al.

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