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Inter prediction plays an important role in most video encoding systems since it could significantly improve coding performance. The more accurate the prediction of the current block, the smaller the residual, and the higher coding efficiency could be achieved accordingly. In this paper, a localized weighted prediction method is proposed to improve inter prediction accuracy. The linear regression...
In this paper, we analyze the binary arithmetic coding of High Efficiency Video Coding (HEVC) and the second generation of audio and video coding standard (AVS2). Then an optimized probability estimation scheme is proposed for arithmetic coder. The proposed scheme is incorporated into the HEVC reference software (HM 16.0) and AVS2 reference software (RD 10.1). Experimental results demonstrate that...
Recently, the renewable distributed energy resources (DERs) have become more and more popular due to carbon-free energy sources and environment-friendly electricity generation. Due to the intermittent power generation patterns, the smart grid has a strong requisite for an efficient communication infrastructure to facilitate estimating the DER states. Different from the traditional methods of centralised...
This paper presents regular method for improving the quality indices of 2D code control systems with respect to minimizing of redundancy and complicity of the systems based on the “perfect” combinatorial configurations prospected from 2D torus cyclic groups, namely the concept of 2D Ideal Ring Bundles (IRBs).
The latest video coding standard HEVC has already improved 40% coding efficiency than H.264/AVC, but it still follows the hybrid coding structure with the translational motion compensation scheme. In this paper, an affine motion representation is described first. The proposed algorithms to improve the motion vector coding for Affine SKIP/MERGE modes are also presented. The experimental results show...
The assembly line balancing problem (ALBP) consists in finding the best assignment of tasks between several workstations. An evenly distribution reduces idle time and therefore results in more efficient production systems. Although several models have been proposed for ALBP, real lines present restrictions that usually violate simplifications assumptions. This paper presents a hybrid genetic algorithm...
Network coding is a new communication paradigm which allows network nodes not only to forward packets but also to combine them together to reduce the number of transmissions. COPE has been the first network coding scheme designed for unicast traffic in wireless networks. COPE-based network coding-aware routing optimization has been proposed to improve network performances. However, it is interesting...
View level bit allocation is an fundamental optimization problem in multiview video plus depth (MVD) based 3D video coding (3DVC). In this paper, we propose a smooth view quality oriented view level bit allocation framework for MVD based 3DVC. The Cauchy-density based rate-distortion model of the texture video and depth map are employed to represent the rate distortion properties. The relationship...
In this paper we present a method for multi-lead ECG signal compression using Predictive Coding combined with Set Partitioning In Hierarchical Trees (SPIHT). We utilize linear prediction between the beats to exploit the high correlation among those beats. This method can optimize the redundancy between adjacent samples and adjacent beats. Predictive coding is the next step after beat reordering step...
In this paper we proposed correcting codes-based on modular arithmetic — to improve the data transmission robustness in wireless sensor networks. We developed a new method and algorithm for the detection and correction of multiple errors. The codes are characterized by high correction characteristics as well as the simplified coding procedure1.
We study the transmission over a cloud radio access network, in which multiple base stations (BS) are connected to a central processor (CP) via finite-capacity backhaul links. Focusing on maximizing the allowed sum-rate, we develop a lattice based coding scheme that generalizes both compute-and-forward and successive Wyner-Ziv coding for this model. The scheme builds on Cover and El Gamal partial-decode-compress-and-forward...
Flash memories use the amount of charge (e.g., electrons) trapped in floating gate transistors to represent data. Charge leakage will cause data retention problem by unidirectionally shifting the cell-level distribution. Balanced codes are an effective means to adjust read thresholds adaptively and tolerate the charge leakage under unknown retention environments. For multi-level cell (MLC) flash memories...
A probabilistic approach is adopted to propose a novel solution to a perplexing puzzle from semantic theory involving the interpretation of generic sentences.
Based on the over-complete dictionary, the signal can be described as sparse linear combination of atoms. Traditionally, the dictionary learning methods are mostly based on a single atom unit. In our framework, sparse subspace clustering is used to categorize the atoms that have the same sparse expressions into groups to form block structure of the dictionary, and then encode the training signal with...
Removing perceptual redundancy plays an important role in image compression. In this paper we developed a foveated just-noticeable-difference (FJND) model to quantify the perceptual redundancy in the image and integrate it in the H.265/HEVC intra encoding framework to provide a perceptually lossless image coding method. The experiments demonstrate that the proposed method effectively increases the...
While inheriting from RAID-6 codes protecting data against two simultaneous disk failures, XOR-based RAID-6 codes are low computational complexity due to only using exclusive-or operations to encode and decode, and are extensively studied and employed in practical. But the potential parallelism of these codes have not yet been sufficiently explored. In this paper, we observe that for XOR-based RAID-6...
Colour shift keying (CSK) is a visible light communication (VLC) modulation scheme, designed for multi-colour light emitting diodes (LEDs), standardised in IEEE 802.15.7. The standard specifies a Reed-Solomon (RS) encoder for the CSK physical layer (PHY). Currently, no investigations have been made to analyse the performance of the RS coded CSK. This paper details, that the CSK systems yield to soft...
Consider a remote estimation system formed by a channel and an encoder that assesses a continuous random variable denoted as source. The internal structure of the channel has a finite state machine (FSM) whose state dictates the transmission characteristics. Each state of the FSM corresponds to a discrete memoryless channel (DMC). At each channel use, information is transmitted from the encoder to...
A recursive encoding of spatially coupled LDPC codes with low complexity has been proposed in recent works. But it has to solve a system of linear equations to terminate the codes. In this paper we modify the protograph of spatially coupled LDPC codes by adding extra variable nodes, called repeat-accumulate(RA) tail, which can simplify the termination without time delays. Performance analysis with...
This paper presents a new degree distribution based on power law so that LT code can perform well. Here, we have simulated our proposed degree distribution and have compared this distribution with robust soliton, binomial, pareto and parabolic distributions. Simulation result shows that this proposed degree distribution outperforms compared to other distribution techniques in terms of message length...
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