UHD Video Coding: A Light-Weight Learning-Based Fast Super-Block Approach

Wang, Miaohui; Xie, Weixin; Meng, Xiandong; Zeng, Huanqiang

doi:10.1109/tcsvt.2018.2873910

Cited by 15 publications

(21 citation statements)

References 29 publications

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“…2 shows the flowchart of the proposed FR-ALF method that is highlighted by the orange color. Our method is based on one of the latest SCU frameworks [12]. Wang et al [12] constructs a data-driven framework in which the extension of CTU to super coding unit (SCU) is systematically studied based on the HEVC platform.…”

Section: Proposed Fr-alf Methods a Super-block Coding Frameworkmentioning

confidence: 99%

“…Our method is based on one of the latest SCU frameworks [12]. Wang et al [12] constructs a data-driven framework in which the extension of CTU to super coding unit (SCU) is systematically studied based on the HEVC platform. Specifically, this SCU framework mainly consists of two phases, including SCU modes and fast SCU decision.…”

Section: Proposed Fr-alf Methods a Super-block Coding Frameworkmentioning

confidence: 99%

“…The associate editor coordinating the review of this manuscript and approving it for publication was Victor Sanchez. (left) [12], and (right) Proposed. employs two in-loop filters to alleviate these artifacts and enhance the reconstruction quality of the reference frames: (1) Deblocking filter (DF) [10] is used to remove the blocking artifact appeared in the boundary of coding units (CUs);…”

Section: Introductionmentioning

confidence: 99%

“…a larger CTU size up to 512×512) has been studied to encode the UHD content, which achieves a higher coding efficiency based on the HEVC platform. It is believed that superblock [12], [28] is essential to solve the compression problem of the UHD videos. Despite the existing contributions, the ALF method has not been fully investigated in the context of super-block video coding.…”

Section: Introductionmentioning

confidence: 99%

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Fine-Grained Region Adaptive Loop Filter for Super-Block Video Coding

et al. 2020

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In video coding, in-loop filter plays an essential role to reduce compression artifacts. This paper introduces a Fine-grained Region Adaptive Loop Filter (FR-ALF) approach for super-block coding based on the High Efficiency Video Coding (HEVC) framework. To address the over-smoothing and low-efficient problems, we introduce a flexible low-complexity FR-ALF method that achieves a finer granularity to control the filtering effect. Moreover, we design a new communication mechanism in order to avoid encoding the same overhead information. Experimental results show that compared with recent advances, our FR-ALF method achieves a satisfactory bit-rate saving by 2.76% on average, and consumes an affordable complexity increment.INDEX TERMS Adaptive loop filter (ALF), super-block coding, ultra high-definition video coding.

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Section: Proposed Fr-alf Methods a Super-block Coding Frameworkmentioning

confidence: 99%

Section: Proposed Fr-alf Methods a Super-block Coding Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fine-Grained Region Adaptive Loop Filter for Super-Block Video Coding

et al. 2020

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“…UHD video is widely applied in various fields, education, amusement, sports, etc. [ 2 , 3 ]. Unfortunately, the large bandwidth and storage space are required for realization of these UHD video applications [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Perceptual Video Coding Scheme Using Just Noticeable Distortion Model Based on Entropy Filter

Cui

Peng

Jiang

et al. 2019

Entropy

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Because perceptual video coding (PVC) can reduce bitrates with negligible visual quality loss in video compression, a PVC scheme based on just noticeable distortion (JND) model is proposed for ultra-high definition video. Firstly, the proposed JND model is designed, considering the spatial JND characteristics such as contrast sensitivity, luminance adaptation and saliency weight factor. Secondly, in order to perform precise JND suppression, the Gauss differential entropy (GDE) filter is designed to divide the image into smooth and complex texture region. Thirdly, through incorporating the proposed JND model into the encoding process, the transform coefﬁcients are suppressed in harmonization with the transform/quantization process of high efﬁciency video coding (HEVC). In order to achieve the JND suppression effectively, a distortion compensation factor and distortion compensation control factor are incorporated to control the extent of distortion in the rate distortion optimization process. The experimental results show that the proposed PVC scheme can achieve a remarkable bitrate reduction of 32.98% for low delay (LD) configuration and 28.61% for random access (RA) configuration with a negligible subjective quality loss. Meanwhile, the proposed method only causes about average 12.94% and 22.45% encoding time increase under LD and RA configuration compared with an HEVC reference software, respectively.

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Boron‐Based Narrowband Multiresonance Delayed Fluorescent Emitters for Organic Light‐Emitting Diodes

Konidena

Naveen

2022

Advanced Photonics Research

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Recently, the exploration of boron (B)/heteroatom-embedded polycyclic nanographites featuring multiresonance thermally activated delayed fluorescence (MR-TADF) garners astonishing attention to promote the advancement of organic light-emitting diodes (OLEDs). Contrary to the traditional donor-acceptor (D-A)-type TADF emitters, the MR-TADF emitters manifest narrowband emission with full width at half maximum (FWHM ≤ 40 nm) and superior photoluminescence quantum yield (PLQY) coupled with the small singlet-triplet energy splitting, which appeal their potential as promising candidates in fabricating efficient OLEDs. Growingly, MR-TADF emitters deliver benchmark device performance comparable to the conventional TADF/phosphorescent emitters. However, they are suffering from the major drawbacks such as difficult to realize full-color emitters, slow exciton upconversion dynamics, aggregationcaused emission quenching, severe efficiency roll-off, and poor operational lifetime, which jeopardizes their practical applicability. Herein, a comprehensive review on B-based MR-TADF emitters reported till date is presented, focusing on the different design strategies documented for circumventing the aforementioned shortcomings. This review is divided into several subgroups based on the emission color of the materials to draw the attention of organic electronics community toward constructing efficient full-color MR-OLEDs. Finally, challenges and opportunities in the MR-TADF emitters are discussed.

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UHD Video Coding: A Light-Weight Learning-Based Fast Super-Block Approach

Cited by 15 publications

References 29 publications

Fine-Grained Region Adaptive Loop Filter for Super-Block Video Coding

Fine-Grained Region Adaptive Loop Filter for Super-Block Video Coding

Perceptual Video Coding Scheme Using Just Noticeable Distortion Model Based on Entropy Filter

Boron‐Based Narrowband Multiresonance Delayed Fluorescent Emitters for Organic Light‐Emitting Diodes

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