| 摘要 |
PROBLEM TO BE SOLVED: To provide an attached information embedding device and a reproducing device capable of presenting attached information synchronized with the reproduction of audio signals without having to include time information in the attached information, and capable of reproducing the audio signals on a general reproduction apparatus. SOLUTION: A set 11 of each piece of attached information and the time when they should be presented is prepared on a delivery side. While reading out an audio signal (S11), the attached information embedding means 10 embeds the attached information in the part of the corresponding time of the audio signal as an electronic watermark (S14). When the length of the attached information is not a fixed time, a synchronization code is embedded prior to the attached information (S13). The audio signal in which the attached information is embedded as an electronic watermark is delivered to a receiving side (S16). On the receiving side, the attached information embedded as an electronic watermark is extracted from the audio signal, and presented in synchronization with the reproduction of the part of the corresponding time of the audio signal. COPYRIGHT: (C)2007,JPO&INPIT
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