Nova Patents
AT386322T

Apparatus and method for embedding and extracting information in analog signals using replica modulation

Abstract

Method for inserting an auxiliary signal in an analog cover signal, comprising the steps of: selecting at least a portion of said carrier signal in a predetermined domain according to a stego key; generating a replica signal from said selected portion of the carrier signal modifying said selected portion of said carrier signal according to the stego key; modifying said replica signal as a function of said auxiliary signal; and inserting the modified replica signal into said analog carrier signal.

Term

Term ended

Expired 16 June 2019, 7.3 years ago.

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10621398United States of AmericaA

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CA2288213A1CanadaA1
WO9853565A1World Intellectual Property Organization (WIPO)A1
US5940135AUnited States of AmericaA
CA2335975A1CanadaA1
WO0000969A1World Intellectual Property Organization (WIPO)A1
EP1002388A1European Patent Office (EPO)A1
US6175627B1United States of AmericaB1
KR20010012707ARepublic of KoreaA
EP1095376A1European Patent Office (EPO)A1
KR20010053329ARepublic of KoreaA
JP2001527660AJapanA
JP2002519916AJapanA
US2002097873A1United States of AmericaA1
US6427012B1United States of AmericaB1
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US2004151316A1United States of AmericaA1
EP1002388B1European Patent Office (EPO)B1
AT336119TAustriaT
ATE336119T1AustriaT1
DE69835521D1GermanyD1
DE69835521T2GermanyT2
ES2270516T3SpainT3
EP1095376B1European Patent Office (EPO)B1
AT386322TThis recordAustriaT
ATE386322T1AustriaT1
DE69938135D1GermanyD1
ES2297927T3SpainT3
JP4217381B2JapanB2
DE69938135T2GermanyT2
JP4251378B2JapanB2
JP2009122680AJapanA
US7606366B2United States of AmericaB2
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JP4807405B2JapanB2
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