发明授权
- 专利标题： Watermark decoder and method for providing binary message data
- 专利标题（中）： 水印解码器和提供二进制消息数据的方法
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申请号： US13589696申请日： 2012-08-20
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公开(公告)号： US09299356B2公开(公告)日： 2016-03-29
- 发明人: Stefan Wabnik , Joerg Pickel , Bert Greevenbosch , Bernhard Grill , Ernst Eberlein , Giovanni Del Galdo , Stefan Kraegeloh , Reinhard Zitzmann , Tobias Bliem , Marco Breiling , Juliane Borsum
- 申请人： Stefan Wabnik , Joerg Pickel , Bert Greevenbosch , Bernhard Grill , Ernst Eberlein , Giovanni Del Galdo , Stefan Kraegeloh , Reinhard Zitzmann , Tobias Bliem , Marco Breiling , Juliane Borsum
- 申请人地址： DE Munich
- 专利权人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- 当前专利权人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- 当前专利权人地址： DE Munich
- 代理机构： Keating & Bennett, LLP
- 优先权： EP10154951 20100226
- 主分类号： G06F17/00
- IPC分类号： G06F17/00 ; G10L19/018
摘要：
A watermark decoder includes a time-frequency-domain representation provider, a memory unit, a synchronization determiner and a watermark extractor. The time-frequency-domain representation provider provides a frequency-domain representation of the watermarked signal for a plurality of time blocks. The memory unit stores the frequency-domain representation of the watermarked signal for a plurality of time blocks. Further, the synchronization determiner identifies an alignment time block based on the frequency-domain representation of the watermarked signal of a plurality of time blocks. The watermark extractor provides binary message data based on stored frequency-domain representations of the watermarked signal of time blocks temporally preceding the identified alignment time block considering a distance to the identified alignment time block.
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