Analysis of the Perceptual Quality Performance of Different HEVC Coding Tools

Atencia, Javier Ruiz; Granado, Otoniel Lopez; Malumbres, Manuel P.; Martínez-Rach, Miguel; Wallendael, Glenn Van

doi:10.1109/access.2021.3062938

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…The test video sequences (see Table 1) from HEVC conformance test proposal [34] were encoded with the SCL parameter set to 1 (default weighting matrices) and 2 (custom weighting matrix scheme), and the gains (BD-rate) were obtained compared to the default encoding (SCL set to 0). The other coding tools have been left with their default values, with the exception of the transform skip (TransformSkip) parameter, which has been disabled for all sequences except those of class F to maximize the perceptual response, as stated in [35].…”

Section: Proposed Contrast Sensitivity Functionmentioning

confidence: 99%

A Hybrid Contrast and Texture Masking Model to Boost HEVC Perceptual RD Performance

Atencia,

López,

Perez Malumbres

et al. 2024

Preprint

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As most of the videos are destined for human perception, many techniques have been designed to improve video coding based on how the human visual system perceives video quality. In this paper, we propose the use of two perceptual coding techniques, namely contrast masking and texture masking, jointly operating under the High Efficiency Video Coding (HEVC) standard. These techniques aim to improve the subjective quality of the reconstructed video at the same bit rate. For contrast masking, we propose the use of a specific weighting matrix for each block size (from 4×4 up to 32×32). We achieve average Bjøntegaard Delta-Rate (BD-rate) gains of between 2.5% and 4.48%, depending on the perceptual metric and coding mode used. The texture masking scheme is based on the classification of each coding unit, using its mean directional variance features as input to a support vector machine model. According to this classification, the block’s energy, the type of coding unit, and its size, an over-quantization is computed to provide a QP offset (DQP) for this coding unit. By applying both techniques in the HEVC Reference Software, an overall average of 5.79% BD-rate gain is achieved.

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Section: Proposed Contrast Sensitivity Functionmentioning

confidence: 99%

A Hybrid Contrast and Texture Masking Model to Boost HEVC Perceptual RD Performance

Atencia,

López,

Perez Malumbres

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Multi-Layer Features Fusion Model-Guided Low-Complexity 3D-HEVC Intra Coding

Liu,

Jia

2024

IEEE Access

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Impact of Video Motion Content on HEVC Coding Efficiency

Salih,

Ali,

Mstafa

2024

Computers

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Digital video coding aims to reduce the bitrate and keep the integrity of visual presentation. High-Efficiency Video Coding (HEVC) can effectively compress video content to be suitable for delivery over various networks and platforms. Finding the optimal coding configuration is challenging as the compression performance highly depends on the complexity of the encoded video sequence. This paper evaluates the effects of motion content on coding performance and suggests an adaptive encoding scheme based on the motion content of encoded video. To evaluate the effects of motion content on the compression performance of HEVC, we tested three coding configurations with different Group of Pictures (GOP) structures and intra refresh mechanisms. Namely, open GOP IPPP, open GOP Periodic-I, and closed GOP periodic-IDR coding structures were tested using several test sequences with a range of resolutions and motion activity. All sequences were first tested to check their motion activity. The rate–distortion curves were produced for all the test sequences and coding configurations. Our results show that the performance of IPPP coding configuration is significantly better (up to 4 dB) than periodic-I and periodic-IDR configurations for sequences with low motion activity. For test sequences with intermediate motion activity, IPPP configuration can still achieve a reasonable quality improvement over periodic-I and periodic-IDR configurations. However, for test sequences with high motion activity, IPPP configuration has a very small performance advantage over periodic-I and periodic-IDR configurations. Our results indicate the importance of selecting the appropriate coding structure according to the motion activity of the video being encoded.

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Analysis of the Perceptual Quality Performance of Different HEVC Coding Tools

Cited by 4 publications

References 23 publications

A Hybrid Contrast and Texture Masking Model to Boost HEVC Perceptual RD Performance

A Hybrid Contrast and Texture Masking Model to Boost HEVC Perceptual RD Performance

Multi-Layer Features Fusion Model-Guided Low-Complexity 3D-HEVC Intra Coding

Impact of Video Motion Content on HEVC Coding Efficiency

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