Communicating Information Between Devices Using Ultra High Frequency Audio

摘要

A client device encodes data into an audio signal and communicates the audio data to an additional client device, which decodes the data from the audio signal. The data is partitioned into characters, which are subsequently partitioned into a plurality of sub-characters. Each sub-character is encoded into a frequency, and multiple frequencies that encode sub-characters are combined by the client device to generate an audio signal. Frequencies encoding sub-characters may be above 16 kilohertz, so the sub-characters are transmitted using frequencies that are inaudible to humans. The audio signal is communicated to an additional client device, which decodes frequencies from the audio signal to sub-characters, which are then combined into characters by the additional client device to generate the data.

主权项

1. A method comprising:
retrieving data from a client device; partitioning the data into one or more characters; partitioning each character into a plurality of sub-characters; determining a base frequency, an increment frequency, and a number of frequency blocks; encoding each sub-character into a frequency associated with a frequency block based on the base frequency, the increment frequency, the number of frequency blocks, and a value of each sub-character; generating an audio signal from the frequencies; and transmitting the audio signal to an additional client device via a speaker of the client device.