Method and device for communication through loudspeakers

Abstract

The invention relates to a method and a device for communication through loudspeakers. The method can be applied between a first device with a first loudspeaker and a second loudspeaker and a second device with a microphone. Firstly, the first device broadcasts a first data sound wave through the first loudspeaker and simultaneously broadcasts a second data sound wave through the second loudspeaker, the combination of the first data sound wave and the second data sound wave can express coded data, then the second device receives the first data sound wave and the second data sound wave through the microphone, and finally, the coded data is acquired according to the first data sound wave and the second data sound wave.

Description

technical field [0001] The present invention relates to a communication method and device using a loudspeaker, in particular to a device with a microphone that receives multiple sound waves played by another device with multiple speakers, and obtains coded data from the combination of the sound waves. Background technique [0002] The development of communication technology has enabled people in different places to exchange opinions and emotions, and the emergence of wireless communication technology has broken through the limitations of wired communication technology, making communication more free and convenient. In fact, the earliest wireless communication technology was only 35 years later than the earliest wired communication. After the Italian inventor Muzi invented the telephone in 1860, the Italian engineer Marconi developed the method of sending and receiving wireless telegrams in 1895. In 1901, Marconi More successfully crossing the Atlantic Ocean with radio signal...

AI Technical Summary

Problems solved by technology

[0003] After a century, the Internet and various long-distance communication technologies have gradually developed and matured. In recent years, cutting-edge technology has been integrated into personal life, and short-distance wireless communication technology that connects various electronic products in series with the user as the center has become the focus of attention. Distance wireless communication technologies include Bluetooth (Bluetooth), IEEE802.11, ZigBee (ZigBee), near field communication (near field communication, NFC), ultrawideband (ultrawideband, UWB), etc., each has its advantages and disadvantages, such as: It has the characteristics of low power, and can reach the transmission speed of 700Kbps and the transmission distance of 10 meters, but the problem of signal interference is prone to occur in the 2.4GHz frequency band; IEEE802.11 can provide greater transmission speed and transmission distance than Bluetooth, For example, in an open space, IEEE802.11a can achieve a transmission power of about 24-35Mbps and a transmission distance of 50 meters, while IEEE802.11b can achieve a transmission power of about 5.5Mbps and a transmission distance of 100 meters, but consumes higher power ZigBee has the advantages of low energy consumption and flexible working frequency band, but with the increase of transmission distance, the problem of transmission speed and data integrity will decrease; NFC can achieve lower power consumption than Bluetooth, and the problem of signal interference is also Relatively few, but the maximum transmission speed is only 424Kbps, and the transmission distance is less than 20 cm; UWB can be called the rising star of short-range wireless transmission, and can provide a transmission rate of 100-500Mbps at a transmission distance of 5-10 meters. However, the current UWB technology is still under development, and its production cost cannot be lowered yet, making the equipment using UWB technology less affordable

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