| 摘要 |
[Problem] To provide an information distribution system capable of selective distribution involving acoustic communication while preventing an increase in the volume of data. [Solution] An information distribution system (1) equipped with: an emitting device (10), equipped with an encoding unit (21) that adds a selective distribution key to calculation source data and calculates an error detection code, a modulation unit (25) that modulates a carrier wave by means of encoded data, and a speaker (17) that emits a modulated signal; and a reception device (30), equipped with a microphone (36), a storage unit (32) that records the selective distribution key, a demodulation unit (41) that demodulates the signal received by the microphone (36), and a decoding unit (42), having a calculation error detection code generation unit (423), which adds the selective distribution key in the storage unit (32) to the calculation source data obtained from the demodulated signal and calculates a calculation error detection code, and a comparison unit (425), which compares the calculation error detection code and the received error detection code obtained directly from the demodulated signal, with various information being decoded only when the comparison result is a match. |
