Acoustic communication device and method

Abstract

The present invention relates to a device for sound wave communication, which transmits and receives sound waves so as to exchange data. An embodiment of the present invention may comprise: a hardware correction table for setting a correction frequency band in which a correction frequency is allocated to each correction value for correcting an error according to the hardware characteristic of a sound wave transmission unit, wherein a reference correction frequency is allocated to correction value "0"; the sound wave transmission unit for generating data frequencies at a predetermined base decibel level allocated to data digits, generating separate reception filter frequencies at the base decibel level for receiving data carried by a sound wave transmitted from the nearest location when sound waves are received, and generating the correction reference frequency at the base decibel level for correcting hardware transmission; and a sound wave reception unit for receiving a sound wave signal transmitted from the sound wave transmission unit, extracting decibel levels at each of the data frequencies to form an array of decibel levels, correcting the array by shifting the array by a correction value extracted using the hardware correction table, and reconstructing data by extracting, in descending order of decibel levels, as many data frequencies as the number of array factors allocated to the separate reception filter frequencies having the highest decibel level among a band of separate reception filter frequencies.

Description

technical field [0001] The present invention relates to a sound wave communication device and method, in particular, to a sound wave communication device and method for transmitting and receiving sound waves and receiving data. Background technique [0002] If you want to activate games and online chats using short-range wireless communications such as wireless broadband (WiFi) and Bluetooth (Bluetooth), almost all mobile communication terminals currently in use need to be used without additional devices and only by downloading software. of short-distance communication. Mobile communication terminals basically have a voice communication function, therefore, an effective solution is communication using sound waves. [0003] Also, generally, acoustic wave communication is low-power communication compared to RF communication such as Bluetooth. Acoustic communication is disclosed in Biometrics, Inc. US Patent No. 5,848,027. Said patent describes a method and system for transm...

AI Technical Summary

Problems solved by technology

[0008] However, there is a disadvantage that hardware characteristics are not considered when performing acoustic wave communication with bits exceeding binary numbers or bits exceeding binary numbers as described above.

That is, when a sound wave is sent through a speaker, due to the hardware characteristics of the speaker, the sound wave may be loaded on a slightly different frequency other than the originally set reference frequency and sent, and the speaker receiving it decodes at the original reference frequency. , cannot receive correct data

[0009] In addition, in the conventional acoustic wave communication, when different signals are transmitted in the same area due to the characteristics of the acoustic wave, there is no data basis. Therefore, when multiple acoustic waves overlap, data cannot be received.

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