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Erasure-coded storages provide data reliability for big data archiving and backup with high storage efficiency. However, erasure code generates a large amount of data transmission traffic in both encoding (write) and decoding (repair) which costs substantial bandwidth in the network. Most of the existing work focus on the decoding cost due to the importance of data repair, but unfortunately overlooks...
Data reliability is a significant issue in large-scale storage systems. Erasure codes provide high data reliability via data recovery, which however generates a large amount of data transmission in the network. The bandwidth cost of transmitting the recovery needed data significantly impacts the performance of the located cluster. Existing work considers the single-failure as the most common failure...
In multiview distributed video coding (DVC) systems, both temporal and inter-view correlations can be exploited through a fusion scheme to generate a better side information (SI) in order to improve the rate distortion (R-D) performance. However, many fusion methods available can not always achieve considerable performance for the influence of some subjective factors. In this paper, we present a new...
Distributed video coding (DVC) is a new kind of video codec scheme that exploits the statistical characteristics of source at the decoder part. The estimated side information is modeled with the original Wyner-Ziv frame and an additive noise. Side information plays an important role in determining the performance of the codec. In turbo-or-LDPC-based DVC decoding, the log-likelihood ratio (LLR) for...
Rate control plays an important role in video coding and transmission. current initialization of quantization parameter (QP) in H.264 rate control takes the same value for images with different complexity as long as the bit number per pixel is the same which is different from the real-world situation. In this paper, we propose a new R-Q model and QP initializing method to improve the precision of...
H.264 is becoming the worldwide digital video standard for consumer electronics and personal computers. In particular, H.264 has already been selected as a key compression codec for the next generation of optical disc formats, HD-DVD and Blue-ray disc. Rate control (RC) plays an important role in allocating H.264 bits to adapt to the actual channel bandwidth and meanwhile achieve high-quality reconstructed...
Summary form only given: In all existing codec designs for asymmetric Slepian-Wolf coding (SWC), it is assumed that the source sequence is i.i.d and equiprobable. When it comes to more complex source statistics, the encoder should firstly remove the redundancy within the source. However, this increases the complexity of the encoder. In this paper, we propose an asymmetric SWC scheme which explores...
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