发明名称 |
METHODS AND APPARATUS FOR GENERATING SIGNATURES |
摘要 |
<p>Signaturing methods and apparatus as described. An example method includes applying a first function to a portion of digital data to produce a first windowed block, applying a second function different from the first function to the same portion of the digital data to produce a second windowed block, determining a first characteristic of a band of frequencies in the first windowed block, determining a second characteristic of the band of frequencies in the second windowed block, comparing the first characteristic to the second characteristic, and assigning a signature bit representative of the portion of the digital data based on the comparison of the first characteristic and the second characteristic.</p> |
申请公布号 |
EP2263335(B1) |
申请公布日期 |
2014.07.23 |
申请号 |
EP20080873178 |
申请日期 |
2008.11.06 |
申请人 |
THE NIELSEN COMPANY (US), LLC |
发明人 |
TOPCHY, ALEXANDER, PAVLOVICH;RAMAMSWAMY, ARUN;SRINIVASAN, VENUGOPAL |
分类号 |
H04H20/14;G10L25/48;H04H60/58 |
主分类号 |
H04H20/14 |
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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