Patent ID: 9002487
Filing Date: 2015-04-07
Classification: G10L,G11B,H03G,H04B,H04H,H04K

Abstract:
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.