Analysis of video coding standards using PSNR and bit rate saving

Prabhakar, B.; Reddy, D. Narasimha

doi:10.1109/spaces.2015.7058271

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…HEVC has already replaced the successful H.264/AVC standard [2], especially for high-resolution formats beyond HD, like the ultra-high definition formats termed as 4 and 8 K. The new HEVC video coding tools allow to achieve bit rate savings of over 50% compared to H.264/AVC, for the same objective video quality [3]. Furthermore, HEVC also outperforms other widespread video codecs used in the Internet such as VP8 and VP9 [4].…”

Section: Introductionmentioning

confidence: 99%

A unified architecture for fast HEVC intra-prediction coding

Ruiz

Fernández–Escribano

Martínez

et al. 2017

J Real-Time Image Proc

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The high efficiency video coding (HEVC) is the new video coding standard, which obtains over 50% bit rate savings compared with H.264/AVC for the same perceptual quality. Intra-prediction coding in HEVC achieves high coding performance in expense of high computational complexity, due to the exhaustive evaluation of all available coding units (CU) sizes, with up to 35 prediction modes for each CU, selecting the one with the lower rate distortion cost, among other new features. This paper presents a Unified Architecture to form a novel fast HEVC intra-prediction coding algorithm, denoted as fast partitioning and mode decision. This approach combines a fast partitioning decision algorithm, based on decision trees, which are trained using machine learning techniques, and a fast mode decision algorithm, based on a novel texture orientation detection algorithm, which computes the mean directional variance along a set of co-lines with rational slopes using a sliding window over the prediction unit. Both algorithms proposed apply a similar approach, exploiting the strong correlation between several image features and the optimal CTU partitioning and the optimal prediction mode. The key point of the combined approach is that both algorithms compute the image features with low complexity, and the partition decision and the mode decision can also be taken with low complexity, using decision trees (if-else statements) and by selecting the minimum directional variance between a reduced set of directions. This approach can be implemented using any combination of nodes, obtaining a wide range of time savings, from 44 to 67%, and light penalties from 1.1 to 4.6%. Comparisons with similar state-of-the-art works show the proposed approach achieves the best trade-off between complexity reduction and rate distortion.

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Section: Introductionmentioning

confidence: 99%

A unified architecture for fast HEVC intra-prediction coding

Ruiz

Fernández–Escribano

Martínez

et al. 2017

J Real-Time Image Proc

View full text Add to dashboard Cite

show abstract

“…Furthermore, HEVC also outperformances other widespread video codecs used in the Internet such as VP8 and VP9 [4]. Special interest has been aroused in the high performance of HEVC using exclusively intra-picture tools for the still images coding, showing gains of around 40% compared with the successful JPEG-2000 standard [5].…”

Section: Introductionmentioning

confidence: 99%