System and method for data reception and transmission in audible frequency band

摘要

Disclosed are a system and a method for transceiving data in an audio frequency band. The system includes a data input unit to input data for acoustic communication into an audio signal, a transmitting unit to transmit the audio signal including the data in the audio frequency band, and a receiving unit that receives the audio signal including the data and performs synchronization of the audio signal through a matched filtering using a matched filter in order to extract the data according to predetermined extraction processing. The data to be transmitted are added to an audio signal and the audio signal is transmitted in the audio frequency band, so that the data for the acoustic communication are effectively transmitted to the recipient in the audio frequency band.

主权项

1. A system for transceiving data in an audio frequency band, the system comprising:
a data input unit to input audio signal data including additional data for acoustic communication as a time axis audio signal, wherein the data input unit divides the time axis audio signal into a plurality of N sections and comprises; a frequency-axis transform part for transforming each of N sections of the time axis audio signal into a frequency-axis signal with each transformed section overlapping the preceding transformed section by a predetermined level; a frequency band selection part which selects a frequency band to establish a group section having a predetermined frequency range based on the frequency axis signal so as to input the data including the additional data for the acoustic communication according to the frequency band selection; a frequency conversion part that converts a subject frequency corresponding to the selected frequency band to input the data including the additional data according to formation of the data; and a time-axis inverse transform part to inversely transform the frequency-axis signal into the time-axis signal to generate the audio signal including the additional data, with said system further comprising; a data transmitting device including a time section selection part to determine time sections having a level suitable for inputting the data including the additional data based on the power intensity of each of the N sections of the time axis signal and a signal output part for transmitting the audio signal including the additional data in the audio frequency band and with the system further comprising; a receiving that receives the audio signal including the additional data and performs synchronization of the audio signal through a matched filtering and extracts the additional data according to predetermined extraction processing.