Intra compression efficiency in VP9 and HEVC

Sharabayko, Maxim P.; Ponomarev, O. G.; Chernyak, Roman

doi:10.12988/ams.2013.311644

Cited by 22 publications

(16 citation statements)

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“…In H.265/HEVC, the input frame was partitioned by using Coding Tree Unit (CTU) with sizes 8×8, 16×16, 32×32, 64×64 of macroblocks, HEVC partitioning is more flexible than previous stander because it's using larger size of block, each input frame of video is divided into square blocks is called Coding Tree Blocks (CTBs), and can be sub partitioning into smaller units, called Coding Unit (CU), the CU is represents the root for Prediction Unit (PU) or (Transform Unit (TU) [6]) [3], see that in Figure 2. There are three types of PU splitting: skipped, intra and inter coded [3], see Figure 3. The TU having coefficients that using for applying the transform and quantization processes, these coefficients are transmit to the decoder after quantization process [7].…”

Section: Hevc Systemmentioning

confidence: 99%

Optimal quality ultra high video streaming based H.265

al-azeez¹,

Khamiss

2020

IJEECS

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Using Ultra-High Definition (UHD) video streaming in real-time transmission over the internet is the main challenge of this paper. Due to the widely variation of the available Internet bandwidth makes the difficulties of video streaming with flexibility and efficiency. In this paper the UHD video is down sampled and encoded at different levels of 4K, FHD, 720p, 4CIF, CIF and QCIF. Experiments were done to find the optimal configuration of H265 features at each level that give the required PSNR, 36 dB, at assigned bitrate. A controller is incorporated with H265 encoder to achieve the adaptation of video streaming on<em> </em>the available bandwidth by choosing the proper level that is compatible with the channel bitrate results of keeping a good quality to the end user. The adaptation of video was realized by making the controller periodically reads the status of the buffer, such function helps the controller to select the proper level, 4K, FHD, 720p, 4CIF, CIF or QCIF to be streamed over the channel. At the decoder the reconstructed video for lower level is done by interpolation scaling up.

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Section: Hevc Systemmentioning

confidence: 99%

Optimal quality ultra high video streaming based H.265

al-azeez¹,

Khamiss

2020

IJEECS

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“…The experiment showed that, on average, the value of b → 0, and the value of a ≈ 1.08. With the value of a not equal to one, we overestimate the real value R(B), which is equivalent to the change of the parameter λ in Equation (1). Therefore, to compensate for the overestimation, we introduce the normalization coefficient k = 1/a = 0.93.…”

Section: Remaining Coefficient Level (Rl)mentioning

confidence: 99%

“…The H.265/HEVC video compression standard is able to provide approximately two-times [1][2][3] better compression efficiency compared to the current industrial video compression standard, H.264/AVC. HEVC is an evolution of the AVC standard, which introduces larger coding block sizes (64 ×64 pixels instead of 16 ×16 in AVC), improves intra-prediction and motion compensation, and refines arithmetic coder.…”

Section: Introductionmentioning

confidence: 99%

Fast Rate Estimation for RDO Mode Decision in HEVC

Sharabayko

Ponomarev

2014

Entropy

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The latter-day H.265/HEVC video compression standard is able to provide two-times higher compression efficiency compared to the current industrial standard, H.264/AVC. However, coding complexity also increased. The main bottleneck of the compression process is the rate-distortion optimization (RDO) stage, as it involves numerous sequential syntax-based binary arithmetic coding (SBAC) loops. In this paper, we present an entropy-based RDO estimation technique for H.265/HEVC compression, instead of the common approach based on the SBAC. Our RDO implementation reduces RDO complexity, providing an average bit rate overhead of 1.54%. At the same time, elimination of the SBAC from the RDO estimation reduces block interdependencies, thus providing an opportunity for the development of the compression system with parallel processing of multiple blocks of a video frame.

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“…Only 33 of these modes are directional interpolation of the neighboring pixels values, while the rest are Planar and DC modes. A comprehensive overview of HEVC intra prediction can be found in [9].…”

Section: Rdo Coding Decisionsmentioning

confidence: 99%

Intra prediction header bits estimation algorithm for RDO in H.265/HEVC

Sharabayko¹,

Ponomarev²

2014

ams

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The amount of video information to store and transmit is continuously increasing. The new video compression standard H.265/HEVC provides the ability to halve video bitrate at the cost of higher computational expenses. The most time-demanding part of a compression system is decision making, especially when based on rate-distortion optimization (RDO). There are a lot of papers that tend to decrease the complexity of decision making by either reducing the number of coding options to compare or by reducing the complexity of RDO estimation. The aim of the latter approach is to eliminate from rate estimation the binary arithmetic coder (BAC), as it is the most computationally expensive step. Most of works focus on proper estimation of the residual data, while proper estimation of prediction information is either neglected or is still performed with BAC.In our work we elaborate the proper rate estimation of the prediction header without the use of BAC. The suggested algorithm counts the symbols to be coded with BAC and estimates the bit size of the intra prediction header based on the entropy of the symbols, obtained in the statistical experiments. The proposed algorithm provides the average Maxim P. Sharabayko and Oleg G. Ponomarev bitrate overhead of 0.09% on JCT-VC test video sequences, and can be used as a part of decision making algorithm in H.265/HEVC video compression systems.Mathematics Subject Classification: 94A08

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Intra compression efficiency in VP9 and HEVC

Cited by 22 publications

References 0 publications

Optimal quality ultra high video streaming based H.265

Optimal quality ultra high video streaming based H.265

Fast Rate Estimation for RDO Mode Decision in HEVC

Intra prediction header bits estimation algorithm for RDO in H.265/HEVC

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