发明名称 |
Electronic watermarking method and apparatus for compressed audio data, and system therefor |
摘要 |
The present invention provides a method and a system with which information embedded in compressed digital audio data can be directly operated. An embodiment of the system for embedding additional information in compressed audio data includes: means for extracting MDCT (Modified Discrete Cosine Transform) coefficients from the compressed audio data; means for employing the MDCT coefficients to calculate a frequency component for the compressed audio data; means for embedding additional information in the frequency component obtained in a frequency domain; means for transforming into MDCT coefficients the frequency component in which the additional information is embedded; and means for using the MDCT coefficients, in which the additional information is embedded, to generate compressed audio data.
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申请公布号 |
US6985590(B2) |
申请公布日期 |
2006.01.10 |
申请号 |
US20000741715 |
申请日期 |
2000.12.20 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
TACHIBANA RYUKI;SHIMIZU SHUHICHI;KOBAYASHI SEIJI |
分类号 |
G10L11/00;H04L9/00;G06F17/14;G10L19/00;G10L19/02;H04K1/00 |
主分类号 |
G10L11/00 |
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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