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Distributed video coding (DVC, Wyner-Ziv coding) gained a lot of interest in this research decade. The major application of DVC is low complexity video encoding, which is well investigated in the literature. Generally, a distributed video coding system uses a feedback channel for rate control, otherwise the data send cannot be used for improved reconstruction quality in most cases. The feedback channel...
Distributed video coding (DVC) gains more and more interest in the recent decade. State-of-the-art Wyner-Ziv decoding is performed by a mandatory feedback channel. It's mandatory for rate allocation and high reconstruction quality. The feedback channel is a handicap for real application. If no feedback channel is available the RD-performance of the system is decreased. We propose a soft reconstruction...
In this paper, we propose a blind geometric warping-based watermarking for images and videos. We put emphasis on high robustness and security as well as decreased complexity. Our previous works have shown that the geometric structure of images and videos is a suitable embedding domain for watermark information. To describe the geometric structure, detection or segmentation methods are used, which...
In this paper, we present a study of video-quality relevant warping parameters. Motivation of our work is to estimate the influence of warping on the quality of videos. This is required for watermarking embedding and attacking approaches that base on warping of images or videos. Therefore, we propose a universal set of parameters, which can be used to describe any warping field. Aim is to estimate...
In object/region-based video coding, the side information is increased by the contour information. Thus, efficient lossy contour coding algorithms have to be developed. A class of very suitable motion segmentation algorithms provide a so-called layered representation of video sequences. Algorithm for segmentation map coding of layered object representations is proposed. It exploits the temporal connectivity...
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