Graphics Multimedia

Complexity-Aware High Efficiency Video Coding by Guilherme Corrêa, Pedro Assunção, Luciano Agostini, Luis A.

By Guilherme Corrêa, Pedro Assunção, Luciano Agostini, Luis A. da Silva Cruz

This booklet discusses computational complexity of excessive potency Video Coding (HEVC) encoders with assurance extending from the research of HEVC compression potency and computational complexity to the relief and scaling of its encoding complexity. After an creation to the subject and a evaluation of the cutting-edge examine within the box, the authors offer a close research of the HEVC encoding instruments compression potency and computational complexity. Readers will reap the benefits of a suite of algorithms for scaling the computational complexity of HEVC encoders, all of which make the most from the pliability of the body partitioning buildings allowed by way of the traditional. The authors additionally offer a suite of early termination tools in keeping with information mining and desktop studying concepts, that are capable of lessen the computational complexity required to discover the easiest body partitioning buildings. The applicability of the proposed equipment is eventually exemplified with an encoding time keep an eye on approach that employs the easiest complexity aid and scaling tools awarded in the course of the publication. The equipment provided during this publication are specially precious in power-constrained, moveable multimedia units to lessen strength intake and to increase battery lifestyles. they could even be utilized to moveable and non-portable multimedia units working in actual time with constrained computational resources.

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The same PB splitting mode is used for luminance and chrominance PBs, which together form the prediction unit (PU). When transform coding the prediction residual, each CB is assumed to be the root of another quadtree-based structure called residual quadtree (RQT). Likewise the CTBs, each CB is recursively partitioned into transform blocks (TB), which are the basic units to which both transform and quantisation operations are applied. 9) are the final TBs, which are chosen in an RDO-based scheme in the HM encoder.

1), where MAX is the maximum value that a sample can assume (2n−1, where n is the number of bits per sample) and MSE is the mean-squared error (MSE) for the image or block, calculated as in Eq. 2). In Eq. 2), m and n are the image dimensions, and O and R represent the original and reconstructed luminance or chrominance samples, respectively. MSE is by itself a distortion metric that quantifies the difference between the samples from two images or blocks. Just as MSE, there are other metrics with the same purpose, which perform this function with larger or smaller computational complexity.

Neighbouring pixels have similar values), redundancy can be reduced through intra-frame prediction, a technique present in most current image and video coding standards. This type of correlation is visible to the human eye, since the neighbouring pixels present similar values [3]. Temporal or inter-frame redundancy arises due to similarities between temporally adjacent frames. g. sky or wall). g. a bird). Efficient techniques for reducing inter-frame redundancy yield high levels of compression and for this reason all current video coding standards exploit such techniques [3].

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