DIGITAL COMMUNICATIONS

A device to apply a digital fingerprint to a digital signal comprises a means of intercepting or acquiring a signal, a storage element and a processor for executing computer implemented program code components in the storage element to effect the methods. The methods include transforming a plurality...

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Bibliographic Details
Main Authors TIRKEL, ANATOL ZYGMUNT, MORENO DE AYALA, OSCAR
Format Patent
LanguageEnglish
French
German
Published 05.08.2015
Subjects
ACOUSTICS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MUSICAL INSTRUMENTS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SPEECH ANALYSIS OR SYNTHESIS
SPEECH OR AUDIO CODING OR DECODING
SPEECH OR VOICE PROCESSING
SPEECH RECOGNITION
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Summary:A device to apply a digital fingerprint to a digital signal comprises a means of intercepting or acquiring a signal, a storage element and a processor for executing computer implemented program code components in the storage element to effect the methods. The methods include transforming a plurality of signal samples onto a discrete orthonormal basis and ranking the transformed samples according to their magnitude. The n largest principal components of the ranked transformed samples are optionally permuted to generate a re-ordered set of principal components, which are then altered by a marking angle. The marked principal components and unmarked non-principal components are converted and combined and applying an inverse of the transform function to the combined principal and non-principal components to generate a fingerprinted digital signal. Methods to prepare the signal for marking, recover the digital fingerprint and verify the distributor and/or recipients of the signal are also disclosed.
Bibliography:Application Number: EP20120847715