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Multi-view video plus depth (MVD) data is a set of multiple sequences capturing the same scene at different viewpoints, with their associated per-pixel depth value. Overcoming this large amount of data requires an effective coding framework. Yet, a simple but essential question refers to the means assessing the proposed coding methods. While the challenge in compression is the optimization of the...
Scalable Video Coding (SVC) provides an efficient solution for video adaptation to satisfy different requirements from heterogeneous mobile clients due to their display sizes and channel conditions. Based on the encoding structure and dependency relationship, SVC packets are entitled with different priorities in presenting quality of video sequences. In this paper, a functional model is derived to...
A classification-based method is proposed to select an optimal path for video streaming over multi-hop mesh networks. Our main contribution is translating of path selection over multi-hop networks to a standard classification problem. The classification is based on minimizing average video packet distortion at the receiving nodes. We also consider long range dependence (LRD) characteristics of variable...
In several telepresence applications the transmitting end is resource constrained, hence multi-view video has to be source coded and transmitted to a location where stereo matching is performed. The effect of video source coding on stereo matching techniques is presently not well understood. In this paper, we present an analysis which quantitatively demonstrates the impact of standard video coding...
Sprite-based video coding offers higher compression efficiency than conventional block-based hybrid video coders. In sprite coding a sequence is divided into a model of its background, i.e. a so-called background sprite image, and a foreground object sequence. These are then encoded and transmitted to the receiver. At the decoder the output video sequence is synthesized using content previously transmitted...
H.264 rate control is an interesting problem that has motivated numerous possible solutions. The challenge lies in determining a quantization parameter Qp that will be used for both the rate-distortion (R-D) optimization process and the quantization of transform coefficients. In this work, we attempt to achieve effective rate control with a different approach. By modelling the relationships of distortion,...
In order to facilitate the H.264/AVC implementation in application system with low bit rate; its coding algorithm should be optimized. In this paper, through analysis of the motion vector distribution in the video image and the serial search strategy, a type of parallel program based on the cross search algorithm is presented, designed and implemented. Finally this design program is played in the...
Pattern-based video coding (PVC) has already established its superiority over recent video coding standard H.264, at low bit rate because of an extra pattern-mode to segment out the arbitrary shape of the moving region within the macroblock (MB). To determine the pattern-mode, the PVC however uses three thresholds to reduce the number of MBs coded using the pattern- mode. By setting these content-sensitive...
In this article we propose an optimization method for encoding low resolution soccer video sequences. The considered video codec is the state of the art H.264/AVC, as recommended by the 3GPP specifications. The proposed optimization aims at maximizing the user perceived quality, considering the characteristic features of soccer videos. In the typical wide angle shots, about one fourth of each frame...
In this paper, a robust FGS video transmission scheme is proposed for streaming video over bandwidth-constrained packet loss channel, which aims to reducing both the overall distortion and quality fluctuation at the same time. We first use channel budget and packet loss property to determine the bits of enhancement layers that should be allocated per frame. Then unequal loss protection (ULP) using...
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