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Quality of ExperienceThe Good, The Bad,and The Ugly!
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Quality of Experience The Good, The Bad, and The Ugly!

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Slides presented at NTNU Audio Visual Forum International Seminar, May 4th, 2009, Trondheim, Norway

Slides presented at NTNU Audio Visual Forum International Seminar, May 4th, 2009, Trondheim, Norway

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    Quality of ExperienceThe Good, The Bad,and The Ugly! Quality of Experience The Good, The Bad, and The Ugly! Presentation Transcript

    • Quality of Experience The Good, The Bad, and The Ugly! Touradj Ebrahimi Adjunct Professor at NTNU/Q2S Professor at EPFL
    • A few initial words
      • This talk is inspired from another talk I gave with the same approach (The Good, The Bad, and The Ugly!) on the future of multimedia retrieval research at CBMI, June 2008, in London, UK
      • This talk also revisits some issues addressed at a previous talk I gave at Yokosuka Research Park (YRP), in Japan, on February 2001, where I suggested the use of Quality of Experience (QoE) as opposed to Quality of Service in communication
    • Pointers to these talks
      • CBMI 2008 talk
        • Title: Future of Multimedia retrieval Research - The Good, The Bad, and The Ugly!
        • Slides of presentation: http://tinyurl.com/d2sxcw
      • YRP 2001 workshop talk
        • Title: Quality of Experience – A new look into quality and its impact in future personal communication
        • Slides of presentation: http://tinyurl.com/d5ebdf
        • Video of presentation: http://www.youtube.com/mmspgroup
    • Communication – a definition
      • Communication is about sharing experience (real or imaginary) with others
      • It all started with story telling and wall drawing around the fire in the caves of early men
      • Modern communication systems are mostly evolved versions of the good old story telling and wall drawing, which hopefully offer increasingly richer experience
      • The degree of richness of the experience is measured by Quality of Experience (QoE)
    • Evolutions versus Revolutions in communication
      • Evolution: A given modality of communication improves itself in terms of Quality of Experience :
        • B&W TV
        • Color TV
        • Stereo and CD quality audio TV
        • HDTV
      • Revolution: New modalities of communication and expression are introduced bringing new dimensions in Quality of Experience
        • Photography
        • Cinema
        • Internet
    • Some of the major evolutions and revolutions in communication
      • Story telling and cave drawing
      • Books and written press
      • Photography
      • Telegraph
      • Telephone
      • Radio and music recording
      • Cinema
      • Television and video recording
      • Internet (including VOIP, IPTV, etc.)
      • Mobile communication
      • Social networking (Web 2.0)
      • (What is next?)
    • Quality of Experience
      • A terminology and concept used in many fields:
        • Religion: S. Crites (1971)
        • Marketing: SW Brown, TA Swartz (1989)
        • Philosophy: G. Harman (1990)
        • Psychology: U. Schiefele (1996)
        • Design: L Alben (1996)
        • Internet: A. Van Moorsel (2001)
        • … and many many other…
    • The Good
    • The Good
      • Digital world has (re-)discovered the notion of quality
        • Lower quality content is less and less tolerated by end-users
        • Digital technology can now rival and even surpass the old analog systems performance while remaining cost effective
      • Increasing interest in QoE
        • Extending from device- and system-centric quality optimization to end-to-end and especially user-centric optimization
    • The Good
      • Challenges in QoE currently under investigation:
        • Reliable quality assessment methods and metrics for speech
        • Reliable quality assessment methods and metrics for pictures
        • Reliable quality assessment methods and metrics for audio
        • Reliable quality assessment methods and metrics for video
        • Reliable quality metrics with full, no, and reduced reference
        • Device and content independent quality metrics
      • Increased interest in workshops and conferences around the notion of quality assessment and metrics
        • QoMEX: International Workshop on Quality of Multimedia Experience (http://www.qomex.org)
        • VPQM: International Workshop on Video Processing and Quality Metrics for Consumer Electronics (http://www.vpqm.org)
        • IMQA: International Workshop on Image Media Quality and its Applications ( http://www.mi.tj.chiba-u.jp/imqa2008/)
    • The Good
      • Standardization efforts in quality assessment and metrics
        • Video Quality Experts Group (VQEG)
        • ITU-T SG 12 (Performance, QoS and QoE)
        • ITU-R WP6C (Prog. production and quality assessment)
        • JPEG (Advanced Image Coding - AIC)
        • MPEG (High performance Video Coding – HVC)
      • Increased interest from industry
    • The Bad
    • The Bad
      • Challenges in QoE not sufficiently addressed
        • Content-dependent quality assessment methods and metrics
        • Context-dependent quality assessment methods and metrics
        • Quality assessment methods and metrics beyond AV (haptics, …)
        • Multi-modal quality assessment methods and metrics (AV, … )
        • 3D quality assessment methods and metrics (3D sound, 3D video, …)
        • HDR content quality assessment methods and metrics
        • Interactivity quality metrics (closely related to usability)
        • Naturalness and Realism quality metrics
      • Lack of quality certification mechanisms
        • Similar to ISO 9000 series
      • Lack of better coordination between experts and disciplines relevant to QoE
    • The Ugly
    • The Ugly
      • Lack of a widely accepted definition of Quality of Experience
        • Some definitions are even contradictory!
      • Increasing usage of ‘QoE’ as a buzz word similar to the usage of ‘ Multimedia’
      • Lack of research funding and coordination especially from the European Commission
        • Several past attempts to get funding have faced failure
        • Lack of vision, understanding, clarity?
        • Costly strategic error for countries and programs not paying sufficient attention to this important topic?
      • Current efforts on QoE are still too fragmented
    • Thank you for your attention Questions?