发明名称 |
Real-time signature embedding in video |
摘要 |
A method and system for embedding an authentication signature in an audio-visual signal such that only a part of an entire frame of the audio-visual signal is stored in a memory while the signature bits are calculated and the watermark is embedded. A signature is formed based on a first portion of said audio-visual signal, whereby said first portion is a pattern of horizontal lines of said audio-visual signal and has fewer lines than the number of lines of the entire audio-visual signal. Thereafter the signature generated is embedded in said audio-visual signal in the first portion and/or in another portion of the frame to be authenticated, whereby the other portion also is a pattern of horizontal lines. Thus only memory for some lines instead for all lines of the audio-visual signal is needed. In the case of an interlaced audio-visual signal, the first portion is preferably the first field of a frame of said audio-visual signal and the second portion is the second field of said audio-visual signal. In the case of a non-interlaced audio-visual signal, slices of said lines are preferably used for said portions.
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申请公布号 |
US2005232417(A1) |
申请公布日期 |
2005.10.20 |
申请号 |
US20040518270 |
申请日期 |
2004.12.16 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS |
发明人 |
ROBERTS DAVID K.;KLIJN JAN;SCHIRRIS JOHAN L. |
分类号 |
G06T7/00;G06T1/00;H04N1/32;H04N1/387;H04N5/91;H04N7/08;H04N7/173;H04N7/26;(IPC1-7):H04N7/167 |
主分类号 |
G06T7/00 |
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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