DEVICE FOR TRANSMISSION OF DATA OVER VOCODER PATH Russian patent published in 1994 - IPC

FIELD: electric communication equipment. SUBSTANCE: device for transmission of data over vocoder path has terminal for connection of output circuit of telephone set 1, voice control unit 2, electron key 3, band-pass filter 4, spectrum analyzer 5, tone-noise detector 6, pitch extractor 7, signal integrating unit 8, transmission control unit 9, terminal for connection of information source 10, terminal for connection of controlling circuit of source 11 of digital information, two change-over switches 12, 14, communication channel 13, signal isolation unit 15, spectrum synthesizer 16, tone-noise change-over switch 17, pitch generator 18, noise generator 19, attenuator 20, low-pass filter 21, terminal for connection of input circuit of TV set 22, unit 23 of threshold elements, three flip-flops 24, 25, 28, program control unit 26, AND gate 37, code combination receiver 29, terminal for connection of receiver of digital information, terminal for connection of controlling circuit of receiver of digital information. Transmission control unit 9 includes two flip-flops, two loggers, AND gate, counter and change- over switch 38. EFFECT: improved capability for prevention of losses of transmitted digital information without deterioration of quality of vocoder communication. 2 dwg