Performance and Signal Processing Annual Report to Committee T1 -- Topic Overview

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1 Performance and Signal Processing Annual Report to Committee T1 -- Topic Overview Value of T1A1 Activities and Products to the Industry Examples of Year 2001 Projects and Accomplishments Objective Video Quality Assessment Quality Standards for IP-Based Networks Reliability Guidelines for IP-Based Public Networks Emerging Issues / New Work Areas T1A1 was highly productive in 2001, and is well positioned to address compelling industry telecom needs during 2002

2 Value of T1A1 Activities and Products to the Industry Network Performance Standards and Technical Reports Basis for network planning, design, operation, maintenance Framework for cooperative provision of end-to-end services Common language for matching services with user needs Signal Processing Standards and Technical Reports Adapt source signals to network transmission characteristics Improve network economy and end-to-end quality of service Examples from 2001 T1A1 Accomplishments QOS clssses for real-time interactive IP services (e.g., VoIP) Video signal processing methods for viewer MOS prediction

3 Objective Video Quality Assessment: Five New T1 Technical Reports Issue: Objective video quality measurement tool needed NOW; 2000 ITU test of proponent systems ended in a dead heat T1A1 Response: Defined best current practices and a way forward TR 72: Accuracy/comparison of video quality metrics TR 73: VQM normalization methods (e.g., calibration) TR 74: VQM specification - Peak Signal/Noise Ratio TR 75: VQM specification - Picture Quality Rating (Emmy!) TR 77: Data/code for calculating VQM resolving power Industry Benefits: Video quality metrics for near term video service deployment Basis for ITU agreement on a single optimum VQM standard

4 Quality Standards for IP-Based Networks Issue: Future IP-based infrastructures must support assured QOS for real-time interactive services T1A1 Response: Key Inputs to Consented ITU-T Rec. Y.1541 Relate subjective descriptions of QoS imperfections (Video: blurry, jerky, blocky, busy, blotchy ) With measurable IP network/terminal characteristics (Packet loss, delay, delay variation, error) Capture results in a limited set of QoS classes Y.1541 will advance PSTN/IP convergence by linking user application needs with network QoS mechanisms

5 Reliability Guidelines for IP-Based Networks Issue: Guidelines and metrics are urgently needed to achieve reliability and availability goals in IP-based networks T1A1 Response: TR 70 Reliability/Availability Framework for IP-Based Networks and Services Provides reliability design guidelines for IP-based networks Presents techniques for IP network reliability enhancement Specifies metrics for reliability service level agreements (SLAs) Will assist service providers, manufacturers in planning, deploying, operating, and maintaining IP-based networks that meet carrier-class reliability requirements

6 Emerging Issues / New Work Areas -- Some Examples Develop Web-based standard defining user-perceived impairments for (e.g.) Voice over IP (VoIP), and illustrate each impairment through the use of associated audio files Develop new TRs addressing reliability and the provision of Emergency Telecommunications Service (ETS) in NGNs Develop standards addressing availability, call set-up, video distribution quality, and dynamic performance negotiation in IP-based networks Substantial work is under way in most of these areas

7 Acknowledgements TSC Leaders: Meeting Hosts: ATIS Staff: John Grigg, Spilios Makris, Oscar Avellaneda, Garry Couch ATIS/T1, NTIA/ITS Elizabeth Jackson, Susan Carioti, Steve Barclay, Jim Crandall Thanks to the leadership and members of Committee T1 for your outstanding support, guidance, and trust!