RADIO BROADCASTING SYSTEM Russian patent published in 2013 - IPC H04H40/27 H03M7/00 

FIELD: radio engineering, communication.

SUBSTANCE: transmitting side comprises: four audio signal processing channels, each including series-connected acoustic detector, audio signal amplifier and an ADC, merged into a coding unit, and a "binary code-to-continuous binary code" converter and a decoder included once more in each audio signal processing channel. Outputs of the decoders are connected to four data inputs of a group signal generator, which includes series-connected sinusoidal oscillator and frequency divider, and a radio signal transmitter as part of the series-connected carrier frequency generator, which is a frequency multiplier, an amplitude modulator and an output amplifier, and at the receiving side, each channel includes a decoder and a unit for restoring the primary code.

EFFECT: lower clock frequency of transmission of digital audio information via 5-bit codes instead of 16-bit codes, which reduces the electromagnetic load of broadcasting by 3,2 times.

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