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Séparation de sources audio informée par tatouage pour mélanges linéaires instantanés stationnaires

Abstract : The source separation issue is addressed, in this PhD thesis, with an innovative point of view. This work joint associates two main domains in the signal processing area : digital watermarking and source separation which are most of the time considered unrelated. Our work aims at giving a "client-user" the possibility to separate different digital source signals that have been mixed together by the only use of their single mixture. To enable such a separation, a watermark is embedded by a "provider-user" into the signal before the mixture has been fixed on its digital support. This watermark which has to be imperceptibly inserted into the signal is made of several pieces of information from original signals. The message can be embedded either directly on source signals available to the "provider" before they are mixed or onto the mixture signal. This method is composed of two main parts, a coder where a "provider" can mix signals and embed the watermark, and a decoder where a client can control the separation based on the mixture signal study. In the present work, it was chosen to embed the watermark into the mixture signal. A typical application addressed by the proposed method is the process of Audio-CD polyphonic (stereo) music. The informed separation must enable a client to control several parameters (such as volume) of the different sources (instruments, voices) that compose the audio scene.
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Submitted on : Friday, January 21, 2011 - 11:33:24 AM
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  • HAL Id : tel-00558209, version 1



Mathieu Parvaix. Séparation de sources audio informée par tatouage pour mélanges linéaires instantanés stationnaires. Sciences de l'ingénieur [physics]. Institut National Polytechnique de Grenoble - INPG, 2010. Français. ⟨tel-00558209⟩



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