Video Quality Measurements

Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

User Quality of Experience factors (QoE) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Technical Factors

MEASUREMENT TAXONOMY ,[object Object],[object Object],[object Object]

Measurement methods review ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Objective Subjective Measurements

Multimedia monitoring methods ,[object Object],[object Object],[object Object],[object Object],[object Object],Subjective MOS (Voice) BT500 (Video) Measurements

Objective methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Measurements

Payload based Measurements ,[object Object],[object Object],[object Object]

Full Reference Methods PSNR Full Reference Objective Payload based MSE SSIM J.144 ,[object Object],[object Object],[object Object]

MSE=0, MSSIM=1 MSE=225, MSSIM=0.949 MSE=225, MSSIM=0.688 MSE=225, MSSIM=0.723 original Image PSNR/MSE Problems ,[object Object]

SSIM – “Solves” PSNR Problems ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Full Reference testing standards

Back to Objective measurement ,[object Object],[object Object],Measurements

Packet – Codec Aware ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The need a codec aware metrics Problem area Robust codec “ Raw” codec

Codec Aware Methods Codec aware Packet based VQI V-Factor VQS Telchemy Objective methods

Example V - Factor ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Packet – Codec Independent ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MEASUREMENT & MONITORING ,[object Object],[object Object]

Measurement & Monitoring phases Analysis Problem Solving Tuning Pre Deployment Testing Lab Testing Design 24/7 Monitoring Deployment Phase Pre-Deployment Phase

Measurement & Monitoring phases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Measurement Levels ,[object Object],[object Object],[object Object],Video Quality Transport Quality Transaction Quality

Transaction Level ,[object Object],[object Object],[object Object],[object Object]

Channel zapping delay ,[object Object],[object Object],[object Object],[object Object],[object Object],Leave latency Join latency Signaling Latency First I Frame Media Latency Total Channel zapping Latency Buffering latency First frame viewed

Transport Level ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Content Level ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Standardization landscape Used in Diagnostics / Lab Used for Monitoring DSL DSL Forum TR-64, TR-69 LAN and WAN monitoring standards ITU Study Group 12 Algorithms for end-to-end transmission performance ITU VQEG – Video Quality Expert Group Video performance measurement based on Subjective tests Database ATIS IIF – IPTV Interoperability Forum QoS Metrics Standardization

Example: ATIS IIF Quality Metrics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Monitoring levels ,[object Object],[object Object],[object Object],[object Object],TR101290 MPEG2TS Headers V-Factor, VQS MDI J.144, PSNR Video payload

Video Quality Measurements

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Video Quality Measurements