IEEE Trans Image Process - Interactive streaming of stored multiview video using redundant frame structures.

Tópicos

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Resumo

While much of multiview video coding focuses on the rate-distortion performance of compressing all frames of all views for storage or non-interactive video delivery over networks, we address the problem of designing a frame structure to enable interactive multiview streaming, where clients can interactively switch views during video playback. Thus, as a client is playing back successive frames (in time) for a given view, it can send a request to the server to switch to a different view while continuing uninterrupted temporal playback. Noting that standard tools for random access (i.e., I-frame insertion) can be bandwidth-inefficient for this application, we propose a redundant representation of I-, P-, and "merge" frames, where each original picture can be encoded into multiple versions, appropriately trading off expected transmission rate with storage, to facilitate view switching. We first present ad hoc frame structures with good performance when the view-switching probabilities are either very large or very small. We then present optimization algorithms that generate more general frame structures with better overall performance for the general case. We show in our experiments that we can generate redundant frame structures offering a range of tradeoff points between transmission and storage, e.g., outperforming simple I-frame insertion structures by up to 45% in terms of bandwidth efficiency at twice the storage cost.

Resumo Limpo

much multiview video code focus ratedistort perform compress frame view storag noninteract video deliveri network address problem design frame structur enabl interact multiview stream client can interact switch view video playback thus client play back success frame time given view can send request server switch differ view continu uninterrupt tempor playback note standard tool random access ie ifram insert can bandwidthineffici applic propos redund represent p merg frame origin pictur can encod multipl version appropri trade expect transmiss rate storag facilit view switch first present ad hoc frame structur good perform viewswitch probabl either larg small present optim algorithm generat general frame structur better overal perform general case show experi can generat redund frame structur offer rang tradeoff point transmiss storag eg outperform simpl ifram insert structur term bandwidth effici twice storag cost

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