发明名称 |
Steganographic encoding and decoding of auxiliary codes in media signals |
摘要 |
Methods of steganographically encoding auxiliary data into audio and decoding the auxiliary data. In an encoding method, a processor maps the auxiliary data to samples in the audio data. A processor modifies the mapping of the auxiliary data to the samples over time. A processor modifies a feature of the samples of the audio data to which the code signals are mapped to convey the auxiliary data substantially imperceptibly in the audio data. In a decoding method, a processor performs decoding of a multibit auxiliary code embedded in an audio signal. A processor decodes code values of the auxiliary code from two or more different portions of the audio signal, each having the multibit auxiliary code. A processor combines the code values decoded from the two or more different portions of the audio signal to determine the code values of the auxiliary code. |
申请公布号 |
US8204222(B2) |
申请公布日期 |
2012.06.19 |
申请号 |
US20050226847 |
申请日期 |
2005.09.13 |
申请人 |
RHOADS GEOFFREY B.;DIGIMARC CORPORATION |
发明人 |
RHOADS GEOFFREY B. |
分类号 |
H04N7/167;G06T1/00;G07C9/00;G07D7/00;G07D7/12;G07F7/08;G07F7/10;G07F7/12;G07F17/16;G10L19/00;G11B20/00;H04B1/66;H04N1/00;H04N1/32;H04N5/913 |
主分类号 |
H04N7/167 |
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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