SYSTEM AND METHOD FOR DISCOURAGING COPYING BY RECURRING QUANTIZATION LOSS
摘要
The present invention alters a signal slightly after the decoding step so that the quantization loss is made recurring while not obvious to a human viewer of the decoded signal. The slightly altered signal, when re-encoded, is degraded enough to be annoying, without the measures being perceived in the first decoded signal. The present invention can be applied to a decoded digital signal if sufficient register space is available or to an analog signal after AD conversion.
申请公布号
WO2004102951(A2)
申请公布日期
2004.11.25
申请号
WO2004IB01591
申请日期
2004.05.03
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;U.S. PHILIPS CORPORATION;FONTIJN, WILHELMUS, F., J.