发明名称 |
APPARATUS FOR, AND METHOD OF, ENCODING A SIGNAL. |
摘要 |
<p>There is provided an apparatus and method for encoding a code signal particularly into an audio signal. Previously as a result of data compression protocol codes hidden into "sync periods" have been degraded or lost as a result of, for example, low pass filtering. Sometimes, during quiet intervals codes were audible. The invention overcomes the problem of encoding a code into an audio signal by sampling the audio signal in order to determine its energy content and embedding the code into a suitable portion of the audio signal so that the code is hidden within a sufficiently energetic portion of audio signal. The advantage is that code is never audible.</p> |
申请公布号 |
MXPA01003391(A) |
申请公布日期 |
2003.07.21 |
申请号 |
MX2001PA03391 |
申请日期 |
1999.10.04 |
申请人 |
CENTRAL RESEARCH LABORATORIES LIMITED |
发明人 |
YIN, JIA, HONG |
分类号 |
G10L11/00;G10L19/00;H04B1/66;H04H20/31;(IPC1-7):H04B1/66;H04H1/00 |
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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