基于高频声音信号的商家信息推广系统

Business information spreading system based on high frequency sound signal

提出利用声音为传输媒介并利用人耳听觉特性,将所要传送的资讯,埋藏在高频音讯中,并实际应用在行动装置上,让店家可以使用扬声器不停的播放声音信号,使消费者靠近店家即可收到该店家的消费资讯。在传送端使用18 k Hz左右的音频,配合RS code,preamble encoder和PSK传递信号,并在接收端使用preamble detection,PLL,RS decoder解出信号,让整个系统最后实现在i OS装置上,实验结果证实系统可以成功传递商家信息。

A new business information spreading system based on high frequency sound signal is proposed.Researching the sound transmission medium and the human ear bearing characteristics, the new business information spreading system hides spreading information in high frequency sound signal and applied on mobile devices to constantly broadcast voice signals by loudspeaker for stores.The consumers can receive the store house consumption information if they are near the stores. The sender uses around 18 kHz audio, RS code, preamble encoder and PSK to pass information signal, and the receiving end use the preamble detection, PLL, the RS to decoder signal.The whole system is finally implemented in the lOS device.the experimental results show that the system can transfer business information successfully.