EP1968044A2 - Système de signaux audiovisuels basés sur des données d'identification contrôlée - Google Patents

Système de signaux audiovisuels basés sur des données d'identification contrôlée Download PDF

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Publication number
EP1968044A2
EP1968044A2 EP08425067A EP08425067A EP1968044A2 EP 1968044 A2 EP1968044 A2 EP 1968044A2 EP 08425067 A EP08425067 A EP 08425067A EP 08425067 A EP08425067 A EP 08425067A EP 1968044 A2 EP1968044 A2 EP 1968044A2
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EP
European Patent Office
Prior art keywords
identification data
audio visual
decoder
signal
unit
Prior art date
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Withdrawn
Application number
EP08425067A
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German (de)
English (en)
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EP1968044A3 (fr
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
P&DA Enterprise Support Srl
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P&DA Enterprise Support Srl
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Filing date
Publication date
Application filed by P&DA Enterprise Support Srl filed Critical P&DA Enterprise Support Srl
Publication of EP1968044A2 publication Critical patent/EP1968044A2/fr
Publication of EP1968044A3 publication Critical patent/EP1968044A3/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/018—Audio watermarking, i.e. embedding inaudible data in the audio signal

Definitions

  • the invention relates an electronic system device able to generate sound signals, of audio frequency range, to insert, by means of a coding unit, both text messages and digital signatures, into musical and speech files, besides it is able to decode them and check their authenticity using a decoder unit.
  • the coder inserts in real time the text containing the data identifying the file and the user's digital signature on line. For this purpose it uses a pseudo random coding in the audio frequency range.
  • the process performed by the coder on the audio frequency signals doesn't alter the sound quality since the changing introduced is imperceptible and unchangeable. Besides this process allows identifying the file and the user through his digital signature.
  • the decoder is the relevant part of the system presented and is able to detect, also in critical conditions, the text and the digital signatures, inserted by the coder in the elaborated files.
  • Critical condition is every situation in which the files, managed in the initial phase by the coder, have had distortions, elaborations and different types of treatments able to modify the audio frequency characteristics.
  • the invention is a solution able to fight the counterfeiting of CD musical, video films and other recordings in the multimedia area of illegal reproduction.
  • the invention uses the "watermarking" in the situations where it is required to know with certainness the producer of the multimedia files in order to allow the identification of the source and to stop the illegal diffusion.
  • the aim of this invention is fighting the hackers of the recording duplication and the illegal diffusion of audio and audiovisual files, including those concerning telephone traces authorized by legal Authority.
  • the main advantage of this invention associated to its innovative architecture, is the relevant protection against every type of attack performed by means of well known solutions to delete the source identity.
  • the invention is a typical electronic product and properly an audiovisual electronic device utilised in the multimedia electronic devices. It basically consists of:
  • the controller is a unit that uses the decoder to extract the hidden message and identify the source.
  • the "source” is considered the unit responsible for the multimedia production process including the place where the recording has been done.
  • the insertion of the algorithm does not allow the cancellation of inserted hidden message in the multimedia signal.
  • the hidden message will remain unaltered in spite of the attempt of erasing it because it is inserted so that it cannot be modified or destroyed without making the basic audiovisual not understandable. Its strength is obtained by working in the frequency range and "spreading" the identification data message in redundant way and mistake correction using the whole frequency range available.
  • the most relevant aspect is the absence of the deletion capability.
  • the watermarking algorithm is programmed in order to provide the no deletion feature of marking signals instead of the no perception feature.
  • the system, Fig.3 is mainly based on the coder unit, Fig.1 , and on the decoder unit, Fig.2 .
  • the coder system consists of, Fig.1 , a cipher unit 1 using a private authentication key k2 of the text message T1, a decipher unit 2 of the audiovisual digital signal S1 using a decipher key k1, a sequence generator 3 using a key k3 controlling the pseudo random sequences, a large range modem 4, a signal audiovisual characteristics analyzer/detector 5, a signal processor 6 which makes a conversion from time to frequency, a signal processor 7 which performs a "watermarking" procedure, a signal processor 8 which makes a reverse conversion from frequency to time, a processor 9 and a storage buffer 10.
  • the digital signal S1 musical sound or speech is received as a ciphered signal and forwarded to the input of the deciphered unit 2 using the K1 key.
  • the multimedia signal will not be reproduced so far as the marker is not applied. As long as the signal is out of the marker device it is transmitted in a ciphered way.
  • the marker device deciphers the signal, makes ready the message consisting of the certified message containing the identification data and it inserts a protected support in the audio (visual) file. When the marker is applied, the audio message is deciphered and it is again understandable.
  • the message T1 is provided to the cipher unit 1 digital input, using K2 key and it is transmitted to the extended range modem 4 to process in computer 7 the watermarking of signal S1, previously processed and transferred in the frequency field by analyser 5 and computer 6.
  • the codex system process ends by the reversing change from the frequency to the time performed by computer 8 which produces on line the audiovisual signal S2 marked in unchangeable and imperceptible way.
  • the decoder Fig 2 , consists of signal elaborator 1 which processes, according to a mathematic algorithm, the S2 signal from the time field to the frequency field, a correlator 3, a pseudo random sequences generator 2 based on the K3 key, a decipher unit for the message based on K4 key, of an analyser-detector 5 of the audiovisual signal parameters, a processor 6 and a buffer device 7.
  • the S2 signal after the treatment 1 in the frequency field, is provided to the correlator 3, working on the pseudorandom sequence generated by source 2, using K3 key and the parameters of the sound signals from analyser 5.
  • the signal originated from the correlation, the hidden message is deciphered in the unit 4 which defines on the public k4 key the text message T1.
  • the decoder can be working off-line, due to the controller need to verify the "ad hoc" message T1 previously inserted and coded.
  • the system presented is implemented by means of a component available on the consumer market.
  • the invention allows coding and decoding phases for audio recorders and it is used mainly in the treatment and in the protection of confidential and private owned.
  • the system is managed by SW program specifically developed, being user interface with coder and decoder and performing the following functions:

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
EP08425067.9A 2007-02-20 2008-02-05 Système de signaux audiovisuels basés sur des données d'identification contrôlée Withdrawn EP1968044A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000094A ITRM20070094A1 (it) 2007-02-20 2007-02-20 Sistema per la marcatura di segnali audio-video con dati identificativi di origine certa

Publications (2)

Publication Number Publication Date
EP1968044A2 true EP1968044A2 (fr) 2008-09-10
EP1968044A3 EP1968044A3 (fr) 2013-09-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425067.9A Withdrawn EP1968044A3 (fr) 2007-02-20 2008-02-05 Système de signaux audiovisuels basés sur des données d'identification contrôlée

Country Status (2)

Country Link
EP (1) EP1968044A3 (fr)
IT (1) ITRM20070094A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2958057A1 (fr) * 2014-06-16 2015-12-23 Wul4 Système et procédés pour transmettre des informations au moyen de signaux acoustiques inaudibles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999017537A1 (fr) * 1997-09-29 1999-04-08 Hewlett-Packard Company Marquage en filigrane d'un objet numerique
US20020191809A1 (en) * 2001-02-27 2002-12-19 Darko Kirovski Asymmetric spread-spectrum watermarking systems and methods of use
US20060156003A1 (en) * 2002-08-21 2006-07-13 Junbiao Zhang Watermarking digital data at a user device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999017537A1 (fr) * 1997-09-29 1999-04-08 Hewlett-Packard Company Marquage en filigrane d'un objet numerique
US20020191809A1 (en) * 2001-02-27 2002-12-19 Darko Kirovski Asymmetric spread-spectrum watermarking systems and methods of use
US20060156003A1 (en) * 2002-08-21 2006-07-13 Junbiao Zhang Watermarking digital data at a user device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BENDER W ET AL: "TECHNIQUES FOR DATA HIDING", IBM SYSTEMS JOURNAL, IBM CORP. ARMONK, NEW YORK, US, vol. 35, no. 3/04, 1 January 1996 (1996-01-01), pages 313-335, XP000635079, ISSN: 0018-8670 *
DARKO KIROVSKI ET AL: "Spread-Spectrum Watermarking of Audio Signals", IEEE TRANSACTIONS ON SIGNAL PROCESSING, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 51, no. 4, 1 April 2003 (2003-04-01), XP011080401, ISSN: 1053-587X *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2958057A1 (fr) * 2014-06-16 2015-12-23 Wul4 Système et procédés pour transmettre des informations au moyen de signaux acoustiques inaudibles
WO2015193226A1 (fr) * 2014-06-16 2015-12-23 Wul4 Système et procédés pour transmettre des informations au moyen de signaux acoustiques inaudibles

Also Published As

Publication number Publication date
EP1968044A3 (fr) 2013-09-04
ITRM20070094A1 (it) 2008-08-21

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