Bruno Macchiavello

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A motion-based side-information generation scheme with semi super-resolution for a scalable Wyner-Ziv coder framework is introduced. It is known that the performance of any Wyner-Ziv coder is heavily dependent on the efficiency of the side-information generation. We propose an iterative block based scheme to generate a semi super-resolution frame using the(More)
Recommended by Frederic Dufaux The distributed video coding paradigm enables video codecs to operate with reversed complexity, in which the complexity is shifted from the encoder toward the decoder. Its performance is heavily dependent on the quality of the side information generated by motio estimation at the decoder. We compare the rate-distortion(More)
In a free-viewpoint video conferencing system, the viewer can choose any desired viewpoint of the 3D scene for observation. Rendering of images for arbitrarily chosen viewpoint can be achieved through depth-image-based rendering (DIBR), which typically employs " texture-plus-depth " video format for 3D data exchange. Robust and timely transmission of(More)
—Free-viewpoint video conferencing allows a participant to observe the remote 3D scene from any freely chosen viewpoint. An intermediate virtual viewpoint image is commonly synthesized using two pairs of transmitted texture and depth maps from two neighboring captured viewpoints via depth-image-based rendering (DIBR). To maintain high quality of synthesized(More)
The emerging video coding standard, HEVC, was developed to replace the current standard, H.264/AVC. However, in order to promote inter-operability with existing systems using the H.264/AVC, transcoding from H.264/AVC to the HEVC codec is highly needed. This paper presents a transcoding solution that uses machine learning techniques in order to map H.264/AVC(More)
Although images as viewed from intermediate virtual viewpoints can be synthesized using texture and depth maps from nearby camera views via depth-image-based rendering (DIBR), the rendered images contain disocclusion holes— spatial regions that were not visible in the reference views due to foreground object occlusion—that requires proper filling. In this(More)
In free viewpoint video, texture and depth maps from two camera-captured viewpoints are transmitted, so that at receiver, a novel virtual view chosen by the client can be synthesized via depth-image-based rendering (DIBR). When irrecoverable packet losses occur during transmission—typically affecting less important spatial regions in the video given unequal(More)