发明名称 |
Data embedding device, data embedding method, data extraction device, and data extraction method |
摘要 |
A data embedding device has: a phase adjusting unit for adjusting a phase of an acoustic signal in accordance with a frame unit in which arbitrary transmission data is to be embedded; and a combining unit for embedding the transmission data in the phase-adjusted acoustic signal. A data extraction device has: a removing unit for removing a low frequency component from an acoustic signal in which arbitrary transmission data is embedded, to generate a low-frequency-removed acoustic signal; a synchronizing unit for synchronizing the low-frequency-removed acoustic signal generated by the removing unit, in accordance with a frame unit used when the transmission data was embedded in the acoustic data; and an extraction unit for extracting the transmission data from the low-frequency-removed acoustic signal synchronized by the synchronizing unit. |
申请公布号 |
US8428756(B2) |
申请公布日期 |
2013.04.23 |
申请号 |
US20060913849 |
申请日期 |
2006.07.07 |
申请人 |
MATSUOKA HOSEI;NTT DOCOMO, INC. |
发明人 |
MATSUOKA HOSEI |
分类号 |
G06F17/00 |
主分类号 |
G06F17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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