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Scalable video coding (SVC) is desirable for video communication in heterogeneous environments where end-users retain different types of terminals. Because motion estimation and compensation are used in SVC to reduce redundancy between frames, the visual quality degrades due to the errors of transmission channels and the error propagation across multiple frames. In order to decrease error propagation...
Flexible Macroblock Ordering (FMO) is one of the new error resilience tools introduced in H264/AVC. Several slice grouping methods have been studied for improving error robustness using FMO. In this paper, a simple and fast slice grouping method for inter frames is introduced. Fast mode decision and early Skip Mode decision are applied for the first encoding pass, and only the features that are available...
In this paper we advocate a multi-resolution mechanism for redundant information generation and transmission with low overheads in bit-rate, in order to enable reliable video communication over challenging lossy networks with low latency. Our previous work entitled RECAP, transmitted a low resolution redundant version of a parent video stream, in order to achieve effective concealment of isolated...
Digital transmission of uncompressed high-definition video is challenging because of its high data rate and its extreme sensitivity to bit errors. In this paper we propose a simple error correction scheme to reduce the bit error effects in the video at the receiver end of a wireless channel. Our scheme uses the large amount of spatial redundancy already present in uncompressed HD video data to provide...
Video streaming is a promising multimedia application and is gaining popularity over wireless/mobile communications. The quality of the video depends heavily on the type of content. The aim of the paper is threefold. First, video sequences are classified into groups representing different content types using cluster analysis based on the spatial (edges) and temporal (movement) feature extraction....
In pixel-domain distributed video coding (DVC), due to the largely translational nature of motion, residue errors in the side-information frame are often clustered together. These clusterings can be exploited to reduce the number of syndrome bits required to successfully perform low density parity check (LDPC) decoding, and therefore improve the overall rate-distortion performance. We shall see that...
Video transmission over noisy channels, like wireless channels, leads to errors on video. Effect of information loss is worse in case of transmission of compressed video. With growing interest in compressed video transmission over such environments, error concealment is becoming more important. In this paper we describe error concealment scheme which uses weighted pixel averaging to obtain each pixel...
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