Codage de source ciblé : Transmission sécurisée, détection

Abstract : This thesis investigates some task-oriented source coding problems. In this framework, an information source is compressed/quantized in view of the task for which it is to be used. While the methods implemented in traditional communication systems aim at enabling good reconstruction of the source, the eventual use of the data is here considered all along the process (from their observation to their transmission). In particular, we derive fundamental results on source coding for secure transmission (following Shannon's approach) and high-rate quantization for detection (following Bennett's approach). In both cases, the characteristics of the environment are used in a smart way to enhance the overall performance of the system. Applications of these results arise in many practical contexts (e.g. for production control, field surveillance, environmental monitoring, multimedia broadcasting, etc.).
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Joffrey Villard. Codage de source ciblé : Transmission sécurisée, détection. Autre. Supélec, 2011. Français. ⟨NNT : 2011SUPL0021⟩. ⟨tel-00777653⟩

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