Invention Grant
US09350700B2 Watermark generator, watermark decoder, method for providing a watermark signal in dependence on binary message data, method for providing binary message data in dependence on a watermarked signal and computer program using a differential encoding
有权
水印发生器，水印解码器，用于根据二进制消息数据提供水印信号的方法，用于根据水印信号提供二进制消息数据的方法和使用差分编码的计算机程序
- Patent Title: Watermark generator, watermark decoder, method for providing a watermark signal in dependence on binary message data, method for providing binary message data in dependence on a watermarked signal and computer program using a differential encoding
- Patent Title (中): 水印发生器，水印解码器，用于根据二进制消息数据提供水印信号的方法，用于根据水印信号提供二进制消息数据的方法和使用差分编码的计算机程序
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Application No.: US13588165Application Date: 2012-08-17
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Publication No.: US09350700B2Publication Date: 2016-05-24
- Inventor: Stefan Wabnik , Joerg Pickel , Bert Greevenbosch , Bernhard Grill , Ernst Eberlein , Giovanni Del Galdo , Stefan Kraegeloh , Reinhard Zitzmann , Tobias Bliem , Marco Breiling , Juliane Borsum
- Applicant: Stefan Wabnik , Joerg Pickel , Bert Greevenbosch , Bernhard Grill , Ernst Eberlein , Giovanni Del Galdo , Stefan Kraegeloh , Reinhard Zitzmann , Tobias Bliem , Marco Breiling , Juliane Borsum
- Applicant Address: DE Munich
- Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Current Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
- Current Assignee Address: DE Munich
- Agency: Keating & Bennett, LLP
- Priority: EP10154964 20100226
- Main IPC: H04L9/32
- IPC: H04L9/32 ; G06F17/00 ; H04L29/06 ; G10L19/018
Abstract:
A watermark generator for providing a watermark signal in dependence on binary message data includes an information processor configured to provide, in dependence on information units of the binary message data, a first time-frequency domain representation, values of which represent the binary message data. The watermark generator also includes a differential encoder configured to derive a second time-frequency domain representation from the first time-frequency-domain representation, such that the second time-frequency-domain representation includes a plurality of values, wherein a difference between two values of the second time-frequency-domain representation represents a corresponding value of the first time-frequency-domain representation, in order to obtain a differential encoding of the values of the first time-frequency-domain representation. The watermark generator also includes a watermark signal provider configured to provide the watermark signal on the basis of the second time-frequency-domain representation.
Public/Granted literature
Information query
