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POSITIONING SYSTEM AND METHOD WITH STEGANOGRAPHIC ENCODED DATA STREAMS IN AUDIBLE-FREQUENCY AUDIO
POSITIONING SYSTEM AND METHOD WITH STEGANOGRAPHIC ENCODED DATA STREAMS IN AUDIBLE-FREQUENCY AUDIO
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机译:音频音频中具有隐写编码数据流的定位系统和方法
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摘要
A system and method for location positioning with steganographic encoded data streams in audible-frequency range audio is disclosed. The method comprises encoding, modulating and audio-hiding data streams into corresponding audible-frequency range steganographic audio signal; transmitting each audio signal by a corresponding loudspeaker, wherein each data stream includes the geographic location of the corresponding loudspeaker, a time stamp of transmission of periodic frames of the data stream and the like. In addition, a mobile device is used for: acquiring an audio signal that includes the transmitted audio signals; separating, demodulating and decoding the data streams therefrom; calculating the distance between the mobile device and each of the loudspeakers based on the time of flight between transmission and acquisition of each of the audio signals; and estimating the geographic location of the mobile device based on the distance between the mobile device and the loudspeakers and the geographic location of the loudspeakers.
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