To enable the transmission of a uniform resource locator(URL) between non-connected equipment by superimposing the URL on an acoustic signal and transmitting it as the acoustic signal.

A keyboard 1101 supplies an URL to be transmitted to an encoder 1102. Based on the URL from the keyboard 1101, the encoder 1102 supplies an acoustic URL signal to an amplifier 1103. The amplifier 1103 amplifies the acoustic URL signal from the encoder 1102 at the level required for a loudspeaker 1104 and supplies it to the speaker 1104. The speaker 1104 outputs the acoustic URL signal supplied from the amplifier 1103.