Title:
ロバスト・チェックサム
Document Type and Number:
Japanese Patent JP2004529526
Kind Code:
A
Abstract:
The invention relates to a method of checking the correct operation of a signal transformation wherein a input signal is transformed into an output signal. The method comprises: deriving a first robust feature from the input signal; deriving a second robust feature from the output signal; comparing said first and second robust features; in case of sufficient sumilarity, concluding a correct operation of said signal transformation, and in case of insufficient sumilarity, concluding a false operation of said signal transformation. In a special embodiment, the method is applied wherein the first robust feature is embedded in the input signal through watermark technology, the thus obtained signal being transmitted to a receiver so as to retrieve an output signal corresponding to said input signal.
Inventors:
Brukers, Alphonse AMR
Heights, Japoor
Van der fehn, mine
Karkel, Antonius
Heights, Japoor
Van der fehn, mine
Karkel, Antonius
Application Number:
JP2002558617A
Publication Date:
September 24, 2004
Filing Date:
December 18, 2001
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G06T1/00; G11B20/18; H03M7/30; H03M13/09; H03M13/29; H03M13/47; (IPC1-7): H03M13/47; G11B20/18; H03M7/30
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito