Method and apparatus for adaptively superimposing bursts of text

Details Method and apparatus for adaptively superimposing bursts of text Method and apparatus for adaptively superimposing bursts of text

1989-10-16

1993-05-18

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358142, H04N 708

Patent

active

052125513

ABSTRACT:
An apparatus is disclosed for adaptively superimposing bursts of text over audio signals comprising an encoder and a decoder wherein said encoder comprises means for separating unencoded audio signals into discrete passbands; means for measuring power levels contained in each discrete passband; a time delay; a plurality of power level comparators; means for generating concatenated bursts of digital header, digital text and digital footer signals; a frequency modulator; a modulator output power adjusting means; means for combining time delayed unencoded audio signals with modulator output level; and, means for transmitting or recording resultant encoded sound signals; wherein said decoder comprise means for separating received encoded sound into discrete passbands; an FM demodulator; a text separator; a television modulator; and sound reproduction means.

REFERENCES:
S. Crowley, "Bringing Radio Up to Date", The Washington Post D3 Jun. 1990.

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