Publication

Subjective Evaluation of Next-Generation Video Compression Algorithms: A Case Study

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Audiovisual focus of attention and its application to Ultra High Definition video compression

Touradj Ebrahimi, Martin Rerabek, Jong Seok Lee, Hiromi Nemoto

Using Focus of Attention (FoA) as a perceptual process in image and video compression belongs to well-known approaches to increase coding efficiency. It has been shown that foveated coding, when compression quality varies across the image according to regi ...

SPIE2014

Compression Performance Analysis in HEVC

Touradj Ebrahimi, Philippe Hanhart

In this chapter, performance analysis of HEVC (Recommendation ITU-T H.265 | ISO/IEC 23008-2) in comparison with AVC (Recommendation ITU-T H.264 | ISO/IEC 14996-10) in terms of both objective as well as subjective quality assessments are given. Because of t ...

Springer International Publishing2014

Consistent and imitable subjective measurement 3D video quality assessment is investigated for evaluating 3D service parameters and as an essential criterion towards the development of objective models. This paper analyzes the results obtained from three t ...

2014

UHD Video Dataset for Evaluation of Privacy

Touradj Ebrahimi

Ultra High Definition (UHD) is one of the emerging immersive video technologies already available to public, as even some of the smartphones are capable of capturing UHD video. The increasingly widespread availability of UHD capable recording devices has i ...

2014

Subjective evaluation of HEVC intra coding for still image compression

Touradj Ebrahimi, Philippe Hanhart, Martin Rerabek

High Efficiency Video Coding (HEVC) demonstrates a significant improvement in compression efficiency compared to H.264/MPEG-4 AVC, especially for video with resolution beyond HD, such as 4K UHDTV. One advantage of HEVC is the improved intra coding of video ...

2013

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After several generations of video coding standards, MPEG High Efficient Video Coding (HEVC) is likely to emerge as the video coding standards for HD and Ultra-HD TV. HEVC decoding is expected to be less computationally demanding and to provide a higher le ...

2013

Subjective quality evaluation of the upcoming HEVC video compression standard

Touradj Ebrahimi, Francesca De Simone, Philippe Hanhart, Martin Rerabek

High Efficiency Video Coding (HEVC) is the latest attempt by ISO/MPEG and ITU-T/VCEG to define the next generation compression standard beyond H.264/MPEG-4 Part 10 AVC. One of the major goals of HEVC is to provide efficient compression for resolutions beyo ...

2012

Dynamic Adaptive Streaming over HTTP (DASH) is a convenient approach to transfer videos in an adaptive and dynamic way to the user. As a consequence, this system provides high bandwidth flexibility and is especially suitable for mobile use cases where the ...

European Signal Processing (EURASIP) Society2012

Towards High Efficiency Video Coding: Subjective Evaluation of Potential Coding Technologies

Touradj Ebrahimi, Francesca De Simone, Jong Seok Lee, Lutz Goldmann

This paper describes the details and the results of the subjective quality evaluation performed at EPFL, as a contribution to the effort of the joint collaborative team on video coding (JCT-VC) for the definition of the high efficiency video coding (HEVC) ...

Elsevier2011

Efficient Video Coding based on Audio-Visual Focus of Attention

Touradj Ebrahimi, Francesca De Simone, Jong Seok Lee

This paper proposes an efficient video coding method using audio-visual focus of attention, which is based on the observation that sound-emitting regions in an audio-visual sequence draw viewers' attention. First, an audio-visual source localization algori ...

Elsevier2011