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This work gives an efficient integer coefficient based discrete cosine transform (I-DCT) module architecture of different sizes that can be incorporated in favor of high efficiency video coding (HEVC) benchmark. This formation is optimized in terms of power and area. It is accompanied by a quantization block. Optimized constant matrix multiplication scheme is adapted to implement the I-DCT architectures...
The second generation Audio-video Coding Standard (AVS2) is the latest video standard currently under the development of Audio-video Coding Standard (AVS) Workgroup of China for achieving higher coding efficiency than previous (AVS1). In intra luminance prediction of AVS2, the AVS2 video encoder has to compute the rate-distortion optimization (RDO) of 9 selected candidate prediction modes in order...
The H.264 Advanced Video Coding (H.264/AVC) standard is considered to be the most commonly used format for video compression. Although it supports a very broad applications range covering all forms of digital compressed video, the confidentiality of the encoded content needs enhancements. The present work proposes a new selective encryption scheme with multiple security levels. In fact, depending...
High Efficiency Video Coding (HEVC) standard represents the newest video coding standard generation for both ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group. The new standard reduces bitrates by 50% compared to the existing standards using Advanced Video Coding (AVC) for equal video quality. This paper provides an overview of the technical features and characteristics...
Encoders based on the High Efficiency Video Coding (HEVC) standard consider an input sequence as a succession of slices grouped in Structures of Pictures (SOP). The SOP used while encoding specifies many parameters, such as the coding order of frames, or the reference frames used during inter-prediction. Reference encoders typically make use of a fixed SOP structure of a given size, which is periodically...
The demands for high quality multimedia contents and the advent of the Ultra High Definition (UHD) resolution have motivated the development of the High Efficiency Video Coding (HEVC) standard, which outperforms prior standards by up to 50% in terms of coding efficiency. This improvement, however, involves higher computational complexity in the encoder side, making it essential for realtime encoders...
This paper proposes a history-based tiling algorithm aiming at the increase of speedup when using Tiles. The algorithm is composed of two independent steps that use workload history information to define the vertical and horizontal boundaries of the Tiles. The workload distribution of previous frames are used as reference to perform the tiling of the current frame exploiting the temporal similarity...
High Efficiency Video Coding (HEVC) is an ongoing standard, which is an extension of H.264/AVC which is the latest coding standard. In HEVC encoder an exhaustive search method is employed to select the best mode for each macro block which consumes more encoding time. Rate and Distortion tradeoff attained for encoding each macroblock introduces more computation complexity. Although, HEVC has better...
Sub-Pixel Motion Estimation and compensation is a high-precision algorithm with very high complexity in HEVC/MPEGH/H.265 Video Codec's. This is because moving objects do not move by integer pixel locations between successive video frames. Typically, fractional pixel accuracy is obtained by means of bilinear interpolation producing a spatially blurred predicted signal. The motion estimation and compensation...
Many video coding standards, including the state-of-the-art High Efficiency Video Coding (HEVC) standard, employ Motion Estimation (ME) at sub-pel precision level to improve the prediction accuracy. However, interpolation and additional Motion Vector (MV) search associated with sub-pel ME result in increased computational complexity. In this paper, an algorithm for fast ME is proposed based on neighbouring...
Since the introduction of the H.261 standard in 1990, the transform step has always been a key feature of video coding technologies. The successive generations of standard have always found a better way to further de-correlate the residual signals and thus improve the coding efficiency. Recently, MPEG and the ITU have jointly launched the Joint Video Exploration Team (or JVET) to prepare the next...
High Efficiency Video Coding (HEVC/H.265) is an emerging standard for video compression that provides almost double compression efficiency at the cost of major computational complexity increase as compared to current industry-standard Advanced Video Coding (AVC/H.264). In HEVC more flexible coding options and partitioning types are provided for prediction units (PUs) and consequently motion estimation...
MV-HEVC is a 3D extension of the High Efficiency Video Coding (HEVC) standard, which is developed to improve the coding efficiency of multi-view video. However, this improved efficiency leads to greater computational complexity. Recently, how to reduce the encoding time for multi-view coding is becoming a hot issue in real-time applications. In this paper, a fast coding unit (CU) decision algorithm...
Like the previous video coding standard, DCT and quantization are also adopted in HEVC. Compared with H.264/AVC, HEVC employs larger transform blocks, which makes the all zero block detection algorithm designed for H.264/AVC inefficient for HEVC. An efficient all zero block detection algorithm aimed at HEVC, especially for 16×16 and 32×32 transform blocks, is proposed in this paper based on frequency...
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...
Intra frame coding plays an important role in video coding. To get better performance, high efficiency coding standards exploit new techniques to improve the performance of intra-coding. A flexible partition structure and multiple prediction modes are applied to achieve accurate intra prediction. Different block sizes and prediction modes are traversed to find the best coding unit and accurate prediction...
In this paper, adaptive PU mode estimation algorithm is proposed to achieve a fast High Efficiency Video Coding (HEVC) encoding. According to HEVC standard, a picture is composed of a number of Coding Tree Units (CTU's). These CTUs are further divided in quadtree structure to form Coding Units (CUs), and CUs have one or more Prediction Units (PUs). The PU mode decision processing to find a best PU...
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...
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)...
High Efficiency Video Coding (HEVC) employs a coding unit (CU), prediction unit (PU), and transform unit (TU) based on the quadtree coding tree unit (CTU) structure to improve coding efficiency. However, the computational complexity increases greatly because the rate-distortion (RD) optimization process should be performed for all CUs, PUs, and TUs to obtain the optimal CTU partition. In this paper,...
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