QoE Evaluation Methodology for HD Video Streaming using Social Networking

Gardlo, B. Ries, M.;Rupp, M.;Jarina, R.Dept. of Telecommun. & Multimedia, Univ. of Zilina, Zilina, Slovakia

QoE Evaluation Methodology for HD Video Streaming using Social Networking

QoE

QoE1I. INTRODUCTIONQuality-of-Experience (QoE) and Social networks has gained strong interest, both from a research and a commercial perspective.Assessment methodologies are extremely time consuming and poorly reect real world scenarios.QoEQoEQoS[1][2]1ITUT SG12QoE[3]IPTV[4]

QoEQoE2II. USER BASED ASSESSMENT Relationship between user, application and network.Absolute Category Rating (ACR)

ACR5

ACR)3II. USER BASED ASSESSMENTInuence factors of quality of experience(QoE)

QoE[]

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[]4III. CONTEXT INFLUENCE AND QOEModern social networks rely not just on the messaging concept

46% of them are under 25 years old and another 26% is under 35 years.QoE

06 / 201170046 2526 359030[ 17 ] Facebook.com[ 17 ]700(11.6hr)Facebook.com

Facebook.com[ 16 ]QoE5III. CONTEXT INFLUENCE AND QOEA. Audiovisual contentSPATIAL AND TEMPORAL CHARACTERISTICS OF CONTENT CLASSES

B. Social and Cultural Aspects

TISI

QoEFacebook.com6IV. TECHNICAL SYSTEMA. Encoder settingsAudio content was encoded using an AAC codec with 48 kHz sampling rate and 96 kbit/s bit rate.

Each of these sequences was further encoded into ve equally distanced video bit rates, 2 Mbit/s for the best quality, and 800 kbit/s for the lowest quality (300 kbit/s step size). Facebook

H.264/MPEG-4 AVC AAC

AAC48 kHz96 kbit / s

> 2 Mbit / s800 kbit / s 300 kbit / s >>30

>>

7IV. TECHNICAL SYSTEMB. End User Devices

Targeting our QoE assessment application on the HD multimedia content, we cannot guarantee that this content will be also watched on native HD capable screens.

About 50% of the users use resolutions of 1024x768, 1280x800 or similar. QoEQoEQoE>>[19]800P50 1024768 1280800>>720p1080p>>Facebook>>8V. QOE ASSESSMENT

A. Statistical relevance of obtained subjective evaluations QoE 30

()() 95%

[20] 0.25 MOS 32-36

50-60

---95 3 95% MOS

0.25-0.3 MOS 0.95

9V. QOE ASSESSMENT

s : sample varianced : accuracy parameter(allowed error in estimation)x^: sample mean : true population meann : minimum sample size

10V. QOE ASSESSMENTB. Assessment results

Action movie 800 kbit/s MOS Histogram. Action movie 2000kbit/s MOS Histogram.

800 kbit / sMOS

>>QoE>>MOS>>MOS45800kbit/ s2000 kbit / s

>>800 kbit / s2.74MOS2 MOS4.11 MOSMOS4

11V. QOE ASSESSMENTMOS values with their 95% condence intervals.

MOS