发明名称 |
PROCESSING A COMPRESSED MEDIA SIGNAL |
摘要 |
<p>A method and arrangement are disclosed for processing a compressed media signal, for example, embedding a watermark in an MPEG2 video signal. The watermark, a spatial noise pattern (140), is embedded (123) by selectively discarding the smallest quantized DCT coefficients. The discarded coefficients are subsequently merged in the runs of other run/level pairs. To compensate for a too large reduction of the bit rate, some of the new run/level pairs are not variable-length encoded (124) but represented by longer code words according to further coding rule (125) providing such longer code words, for example, MPEG's "Escape coding".</p> |
申请公布号 |
WO03009602(A1) |
申请公布日期 |
2003.01.30 |
申请号 |
WO2002IB02737 |
申请日期 |
2002.07.02 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
STEENHOF, FRITS, A.;LANGELAAR, GERRIT, C. |
分类号 |
H04N7/30;G06T1/00;H03M7/40;H04N1/32;H04N7/08;H04N7/081;H04N7/26;(IPC1-7):H04N7/26 |
主分类号 |
H04N7/30 |
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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