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In this paper, we address the problem of HEVC encoding complexity with Ultra High Definition videos. Block partitioning probabilities given the variance operator are learned off-line and are then used in our low complexity Intra encoder to speed-up the quad-tree construction. Two variants of the partitioning scheme are proposed and experimental results show that the encoding time can be reduced by...
The H.264/AVC video coding standard is used in a wide range of applications from video conferencing to high-definition TV. Compared to the previous standard, the H.264/AVC has significantly better performance in terms of PSNR and visual quality at the same bit rate. It uses a complex mode decision technique based on rate-distortion optimization (RDO). Therefore, this technique introduces a high computational...
The High Efficiency Video Coding (HEVC) is the next generation video coding standard. The HEVC provides equivalent perceptual quality with bit-budget saving greater than 50% compared to the H.264/AVC. In this paper, we propose a new fast intra prediction mode decision algorithm for the HEVC. We apply an early termination method based on the statistics of the resulted IPMs from both rough mode decision...
This paper proposes a model and algorithm to compute the time encoded output of a linear filter directly from the time encoded input. The time encoding machine considered in this study is the integrate-and-fire neuron model. The proposed direct encoding approach is much faster than the indirect approach, involving simulating the filter output and subsequent encoding. A numerical simulation study is...
The latest generation standard of video coding, High Efficiency Video Coding (HEVC) achieves the goal of requiring 50% bit-rate of the H.264/AVC at the same image quality. It adopts quad-tree based flexible coding unit structure as prediction unit (PU) sizes which are defined from 64×64 to 4×4, and plenty of intra prediction modes whose reference samples are spatially reconstructed neighboring samples...
The latest high efficiency video coding (HEVC) has increasing requirement to be implemented in a heterogeneous platforms or a GPU accelerators. However, due to the data dependency between neighboring blocks merge candidate lists of neighboring blocks cannot be generated in parallel and induce a bottleneck for parallel encoder designs. In this paper, a parallel merge mode prediction algorithm is presented,...
The increasing availability of 3D video systems and applications has attracted more consumers for 3D viewing experiences and, consequently, the demand for storage and transmission of 3D video content is growing. An interesting alternative for this need is the transmission of 3D video based on the Multiview Video plus Depth (MVD) format. The upcoming 3D High Efficiency Video Coding (3D-HEVC) standard...
Motivated by the need to secure cyber-physical systems against attacks, we consider the problem of estimating the state of a noisy linear dynamical system when a subset of sensors is arbitrarily corrupted by an adversary. We propose a secure state estimation algorithm and derive (optimal) bounds on the achievable state estimation error. In addition, as a result of independent interest, we give a coding...
The latest High Efficiency Video Coding was aggregated in order to enhance the previous H264.AVC by a rate compression decrease of 50% with the same image quality. The HEVC intra prediction procedure requires a high computational complexity that needs to be alleviated. To this end, the paper proposes a new approach of intra prediction process without the use of the planar mode. The performance of...
Forward error correction techniques are commonly used for delay-sensitive video streaming applications. Streaming of compressed videos can usually withstand a certain level of packet loss, depending on the compression methods and error concealment techniques. In this paper, a QoS-driven optimization algorithm is proposed for the streaming of scalable videos using layer-aligned multipriority rateless...
This paper presents a qualitative discussion of the depth maps properties that can be considered to achieve complexity reduction for 3D-High Efficiency Video Coding (3D-HEVC) depth maps coding. Both intra and inter-frame predictions are considered in this discussion that conduced to the proposition of two simple complexity reduction techniques: the Simplified Edge Detector (SED) and the Diamond Search...
This paper introduces a novel approach for coding luminance images using kernel-based adaptive filtering and context-adaptive arithmetic coding. This approach tackles the problem that is present in current image and video coders; these coders depend on assumptions of the image and are constrained by the linearity of their predictors. The efficacy of the predictors determines the compression gain....
This paper proposes a fast intra prediction algorithm for the High Efficiency Video Coding (HEVC). HEVC has 35 modes, such as DC mode, Planar mode, and 33 angular modes for the intra-prediction. To reduce the complexity and to support fast decision for intra prediction, this paper proposes a hierarchical mode decision method (HMD). The proposed HMD mainly focuses on how to reduce the number of prediction...
A Fast Segment-wise DC Coding (SDC) algorithm is proposed for 3D-HEVC depth intra coding. Since SDC is a supplementary option for intra prediction modes, it is not necessary to check SDC option for all intra candidate modes during full Rate-Distortion (RD) cost calculation. Based on the observation that most Prediction Units (PUs) choose the same intra coding mode with and without SDC option, we propose...
In this paper, a frame compatible format fast encoder with stereo matching is proposed. Through packing the two neighboring views after down-sampling into one frame, the frame compatible format coding allows stereo video to be encoded on the conventional video applications. The matching of content similarity is the key of the fast encoder of Frame Compatible Format (FCF) H.264. Experiments show that...
High Efficiency Video Coding (HEVC) is the next generation video compression standard providing significant coding performance. It adopts 35 intra prediction modes with larger CU size to improve the intra encoding efficiency, so that cause a high computational complexity. In this paper, two fast intra-prediction algorithms are proposed to reduce the number of candidate modes for rate-distortion (RD)...
The High Efficiency Video Coding (HEVC) standard makes use of flexible partitioning to achieve high compression ratios. Each frame is divided in Coding Tree Units (CTUs) of fixed size, which are further partitioned into Coding Units (CUs) following a recursive quadtree structure. Typically, CUs at each level of recursion are tested to select the optimal coding configuration, hence this process is...
In video coding, the coding decisions made during the encoding of a reference frame impact the achievable rate distortion performance of all inter-predicted frames which refer to it. Most encoders operate frame-by-frame and do not specifically consider this inter-dependency. In this paper, a multi-frame transform coefficient optimization method for H.265/HEVC is proposed. The inter-frame dependencies...
An efficient inter-coding algorithm for H.264 video coding standard is presented that gives a simultaneous improvement of encoding time and bit rate without a loss in SNR. This is an extension of 3DRS algorithm for variable block sizes which was previously known for fixed block sizes. We use central difference to find boundaries in a consistent motion vector field to make macroblock partition decision...
In this paper we propose the use of adaptive-context-based prediction in a sequential mode for lossless audio compression. We show that lossless compression algorithms with sequential context based prediction can achieve better compression results than with forward-frame-based linear prediction. Two distinct algorithms are proposed and evaluated for audio signal sampled at 48 kHz with 16 bits/sample...
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