IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 1 Motion and Disparity Compe.pdfVIP

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 1 Motion and Disparity Compe.pdf

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 1 Motion and Disparity Compe

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 1 Motion and Disparity Compensated Coding for Multi-View Video Markus Flierl, Member, IEEE, Aditya Mavlankar, Student Member, IEEE, and Bernd Girod, Fellow, IEEE Invited Paper Abstract— We investigate the rate-distortion efficiency of mo- tion and disparity compensated coding for multi-view video. Disparity compensation exploits the correlation among the view sequences and motion compensation makes use of the temporal correlation within each view sequence. We define a matrix of pictures with N view sequences, each with K temporally successive pictures. For experimental coding purposes, a scheme based on H.264/AVC is devised. We assess the overall rate- distortion efficiency for matrices of pictures of various dimensions (N, K). Moreover, we discuss the impact of inaccurate disparity compensation within a matrix of pictures. Finally, we propose and discuss a theoretical model for multi-view video coding that explains our experimental observations. Performance bounds are presented for high rates. Index Terms— Multi-view image sequences, motion and dis- parity compensated coding, video camera arrays. I. INTRODUCTION Today’s advances in display and camera technology en- able new applications for 3D scene communication: In free viewpoint video, image sequences recorded simultaneously with multiple cameras are transformed into a special data representation that enables interactive 3D navigation through the dynamic scene [1]. Driven by multi-view video, autostereo- scopic 3D displays can produce both stereo and movement parallax with a small number of views [2]. Other researchers have experimented with densely packed camera arrays [3]. Large video camera arrays may also be part of a 3D TV system which enables users to view a distant 3D world freely [4]. Such systems may be based on a ray-space representation as used for free viewpoint television (FTV) [5] [6]. Others may utilize the concept of a multi-video-plu