Superposition of data over voice

Details Superposition of data over voice Superposition of data over voice

2006-02-07

2006-02-07

Ramakrishnaiah, Melur (Department: 2643)

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

C329S350000, C329S350000, C370S493000

Reexamination Certificate

active

06996213

ABSTRACT:
Method and apparatus for transmitting messages between communication devices via a communication channel allowing at least voice messages to be transmitted, the messages including data subdivided in a sequence of basic data units, the method including; a) encoding the basic data units as unique signals (usj) including a predetermined number of basic signals (bi), each basic signal having a unique fixed frequency (fi); b) transmitting a sequence of unique signals (usj) during a sequence of fixed time periods (t1,t2,t3, . . .); c) receiving and decoding the sequence of unique signals (usj) into the sequence of basic data units; the data being transmitted in superposition over voice.

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