| 摘要 |
PROBLEM TO BE SOLVED: To provide an information delivery system capable of performing selective delivery in acoustic communication while suppressing an increase in data capacity.SOLUTION: An information delivery system 1 comprises: a transmission device 10 provided with an encoding unit 21 for calculating an error detection code by adding a selective delivery key to calculation source data, a modulation unit 25 for modulating a carrier wave by encoded data, and a speaker 17 for transmitting a modulated signal; and a receiving device 30 provided with a microphone 36, a storage unit 32 for keeping selective delivery keys recorded therein, a demodulation unit 41 for demodulating the received signal of the microphone 36, and a decoding unit 42 having a calculation error detection code generation unit 423 for calculating a calculation error detection code by adding the selective delivery key of the storage unit 32 to the calculation source data obtained from the demodulated signal, and a comparison unit 425 for comparing a reception error detection code directly obtained from the demodulated signal and the calculation error detection code, the decoding unit 42 used for decoding each kind of information only when the compared codes match. |
