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In this paper, we present an efficient lossless ECG compression method for real-time applications. The proposed method hybridizes ECG predictive coding algorithm based on R-wave identification and Takagi-Sugeno fuzzy neural network. The ECG signal is predicted and encoded by using the periodicity of the electrocardiogram, the correlation between the electrocardiogram signal and the adjacent heartbeat,...
This work presents a low-area scalable architecture for the Depth Modelling Mode 1 (DMM-1) encoder of the 3D High Efficiency Video Coding (3D-HEVC) standard, removing the refinement stage. This simplification causes a small BD-rate increase (0.09%) but a significant reduction in memory usage of 30%. The scalable architecture can support different block sizes. Synthesis results for ST 65 nm Standard...
The latest video compression standards, such as the H.264/AVC and the High Efficiency Video Coding (HEVC), provide fast Motion Estimation (ME) algorithms in their reference software aiming at complexity reduction. Test Zone Search (TZS) is the state-of-the-art fast ME algorithm, currently deployed in the reference HEVC encoder due to its great coding efficiency. However, ME is still one of the main...
A few years after standardization of the High Efficiency Video Coding (HEVC), now the Joint Video Exploration Team (JVET) group is exploring post-HEVC video compression technologies. In the intra prediction domain, this effort has resulted in an algorithm with 67 internal modes, new filters and tools which significantly improve HEVC. However, the improved algorithm still suffers from the long distance...
This paper presents two intra prediction algorithms in High Efficiency Video Coding (HEVC) encoder for reducing the computational complexity and increase the encoding speed. The first algorithm takes advantage of the high spatial correlation among neighboring pixels to substitute the reference samples as the first row or first and second rows of the current block to be predicted, while the pixels...
The WRGB-OLED with larger-sized display resolution can bring us more colorful and better visual experiences. However, it also makes OLED display system suffer from a serious bottleneck on memory bandwidth. In this paper, the lossless pixel-gradient EC algorithm is proposed to overcome this bottleneck. It consists of two core techniques: Finer-Gradient-Based Prediction (FGBP) and Gradient-Based Golomb-Rice...
In this paper we propose a new lossless compression algorithm suitable for Internet of Things (IoT). The proposed algorithm, named RAKE, is based only on elementary counting operations and has low memory requirements, and therefore it can be easily implemented in low-cost and low-speed micro-controllers as those used in IoT devices. Despite its simplicity, simulation results show that, in the case...
The 3D High Efficiency Video Coding (3D-HEVC) has recently been approved by the Joint Collaborative Team on 3D Video coding (JCT-3V) and standardized as an extension of HEVC. To improve the intra coding efficiency of Multi-view Video plus Depth maps (MVD), the 3D-HEVC brings a good intra coding solution, but the computational complexity load increase significantly, which restricts the use of 3D-HEVC...
This work presents the Edge-Aware Depth Motion Estimation (E-ADME), a complexity reduction scheme developed for depth maps coding on 3D High Efficiency Video Coding (3D-HEVC). This scheme focuses on obtaining an execution time reduction while keeping a high quality of the encoded depth map. E-ADME starts classifying each encoding depth block as edge or homogeneous. If the block is classified as an...
In order to reduce the computational complexity of the intra prediction module in HEVC, this paper proposes an optimization method for intra prediction mode selection. First, the size of the prediction block PU in HEVC is obtained. For 4×4 size PU block, the prewitt operator is used to extract the texture direction. Then, we judge whether the texture direction is obvious or not. If it is obvious,...
Intra prediction plays an important role in H.264/AVC. The mode fast decision is a significant factor for video coding efficiency in current video coding standard. Therefore, in this paper, the authors propose a method with equivalent Mean Square Error (Eq-MSE) to choose the prediction mode quickly to save coding resource. According to the frame texture characteristics, the authors choose the block...
As the latest 3D video coding standard, 3D High Efficiency Video Coding (3D-HEVC) achieves efficient coding. Depth coding plays an important role in 3D-HEVC. For better prediction of edges in depth maps, new depth intra modes were proposed, such as Depth Modeling Modes (DMMs). DMM Mode 1, namely explicit wedgelet signalization mode, can improve the performance of synthesized views, but leads to unaffordable...
In recent years, surveillance videos are playing an important role in modern security systems. As a state-of-the-art video coding standard, High Efficiency Video Coding (HEVC) has been deployed in many surveillance cameras. Nevertheless, the request of real-time and high subjective quality coding still poses the great challenging problem of efficient representation and compression for high complexity...
The present work describes the PPM — Prediction by Partial (string) Matching algorithm for lossless compression of text. It studies the procedure of extending the source alphabet for the PPM encoding in order to allow using of symbols not yet present in the source alphabet at the very beginning of the process of text encoding. The work describes the procedure of extending the alphabet and presents...
This paper proposes a fast algorithm based on depth map segmentation for the depth coding of 3D video coding to reduce the coding complexity of the depth map. The proposed algorithm segments the depth map into different regions by modifying automatic thresholding technique. We also propose the search range adjustment according to the classification of the coding tree unit (CTU). The early termination...
Compared with H.264/AVC, H.265/HEVC achieves better image quality at the same coding bit rate, but requires more complexity in its coding process. In this paper, we propose a fast inter/intra decision method that can reduce the required encoding time with very little increase in required rate and PSNR degradation. We also introduce the weighted sampling and adaptive threshold condition to determine...
High Efficiency Video Coding (HEVC) standard has a superior video compression rate compared with previous H.264/AVC. At the same time, Ultra-high-definition (UHD) video applications are becoming a reality under the development of the display technology. In this paper, a hardware-friendly multi-layer HEVC motion estimation (ME) algorithm for UHD applications are proposed. To keep the computational...
This paper presents a complexity reduction technique for 3D High Efficiency Video Coding (3D-HEVC) using Rate-Distortion (RD) list reduction in the depth maps intra-frame prediction. In the 3D-HEVC standardization, the HEVC intra-frame prediction was inherited from texture to depth maps. However, considering depth maps simpler behavior than texture, the intra-frame prediction contains an unnecessary...
Designing ultra-low latency coding algorithms has been the key concern for the development of live video system. In the current video coding standards, the capacities of frame memory and bus bandwidth are the major aspects that affect the performance of encoder and decoder. To address this issue, this paper proposes a low-latency reference frame compression algorithm, which utilizes spatial correlation...
The H.264 video coding standard can greatly outperform other previous coding standards in both PSNR and visual quality. This efficiency is achieved by using several powerful coding techniques. One important technique is the variable block-size mode prediction. However, this feature results in extremely high computational complexity when the rate distortion optimization (RDO) technique is used. In...
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