Broadcast Engineering - April 2008 - (Page 37) FEATURE QOE FOR IPTV END BY GERARD O’DRISCOLL USERS D elivering TV services over an IPbased network has a unique set of technical and commercial challenges. Ensuring that end users receive a TV experience that compares favorably with other services offered by cable and satellite pay-TV operators is one of the biggest challenges faced by IPTV service providers. At its most basic level, IPTV operators need to ensure that their customers immediately receive a channel that they request via their remote control and that high-quality video content is displayed on screen. From a subscriber’s perspective, this is just a basic requirement, but the implementation of this functionality, particularly for a large IPTV network, can be problematic for network operators. QoE and QoS defined One of the core requirements of achieving high satisfaction levels is to implement a quality of experience (QoE) measurement system that will closely monitor and benchmark the perception that an IPTV end user has of the service. The term QoE refers to the experience associated with watching an IPTV service. This not only relates to picture quality but can also cover other areas such as responsiveness and usability. This contrasts with quality of service (QoS), where the measurements are purely based on networking parameters such as jitter, packet loss and delays. Before examining both topics in greater detail, it is first helpful to understand some of the factors that reduce QoE and QoS levels. There are several factors that negatively affect an end user while interacting with IP-based TV services. Packet queuing and video jitter are two of the most common issues faced by providers when attempting to maximize QoE and QoS levels. Packet queuing At its most basic level, the queuing of IPTV packets involves a router or a switch storing packets of IP data for a short period, while the network device April 2008 | broadcastengineeringworld.com 37 http://broadcastengineeringworld.com
Table of Contents Feed for the Digital Edition of Broadcast Engineering - April 2008 Broadcast Engineering - April 2008 Contents Editorial HD Newsrooms Wavelet Compression Mobile TV Audio Processing for HDTV, Part 1 QoE for IPTV End Users NAB Update Asset Management Advertisers Index Broadcast Engineering - April 2008 Broadcast Engineering - April 2008 - Broadcast Engineering - April 2008 (Page Cover1) Broadcast Engineering - April 2008 - Broadcast Engineering - April 2008 (Page Cover2) Broadcast Engineering - April 2008 - Broadcast Engineering - April 2008 (Page 3) Broadcast Engineering - April 2008 - Contents (Page 4) Broadcast Engineering - April 2008 - Contents (Page 5) Broadcast Engineering - April 2008 - Contents (Page 6) Broadcast Engineering - April 2008 - Contents (Page 7) Broadcast Engineering - April 2008 - Editorial (Page 8) Broadcast Engineering - April 2008 - Editorial (Page 9) Broadcast Engineering - April 2008 - HD Newsrooms (Page 10) Broadcast Engineering - April 2008 - HD Newsrooms (Page 11) Broadcast Engineering - April 2008 - HD Newsrooms (Page 12) Broadcast Engineering - April 2008 - HD Newsrooms (Page 13) Broadcast Engineering - April 2008 - HD Newsrooms (Page 14) Broadcast Engineering - April 2008 - HD Newsrooms (Page 15) Broadcast Engineering - April 2008 - Wavelet Compression (Page 16) Broadcast Engineering - April 2008 - Wavelet Compression (Page 17) Broadcast Engineering - April 2008 - Wavelet Compression (Page 18) Broadcast Engineering - April 2008 - Wavelet Compression (Page 19) Broadcast Engineering - April 2008 - Wavelet Compression (Page 20) Broadcast Engineering - April 2008 - Wavelet Compression (Page 21) Broadcast Engineering - April 2008 - Mobile TV (Page 22) Broadcast Engineering - April 2008 - Mobile TV (Page 23) Broadcast Engineering - April 2008 - Mobile TV (Page 24) Broadcast Engineering - April 2008 - Mobile TV (Page 25) Broadcast Engineering - April 2008 - Mobile TV (Page 26) Broadcast Engineering - April 2008 - Mobile TV (Page 27) Broadcast Engineering - April 2008 - Mobile TV (Page 28) Broadcast Engineering - April 2008 - Mobile TV (Page 29) Broadcast Engineering - April 2008 - Mobile TV (Page 30) Broadcast Engineering - April 2008 - Mobile TV (Page 31) Broadcast Engineering - April 2008 - Mobile TV (Page 32) Broadcast Engineering - April 2008 - Audio Processing for HDTV, Part 1 (Page 33) Broadcast Engineering - April 2008 - Audio Processing for HDTV, Part 1 (Page 34) Broadcast Engineering - April 2008 - Audio Processing for HDTV, Part 1 (Page 35) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 36) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 37) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 38) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 39) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 40) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 41) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 42) Broadcast Engineering - April 2008 - QoE for IPTV End Users (Page 43) Broadcast Engineering - April 2008 - NAB Update (Page 44) Broadcast Engineering - April 2008 - NAB Update (Page 45) Broadcast Engineering - April 2008 - NAB Update (Page 46) Broadcast Engineering - April 2008 - NAB Update (Page 47) Broadcast Engineering - April 2008 - NAB Update (Page 48) Broadcast Engineering - April 2008 - NAB Update (Page 49) Broadcast Engineering - April 2008 - NAB Update (Page 50) Broadcast Engineering - April 2008 - NAB Update (Page 51) Broadcast Engineering - April 2008 - NAB Update (Page 52) Broadcast Engineering - April 2008 - NAB Update (Page 53) Broadcast Engineering - April 2008 - Asset Management (Page 54) Broadcast Engineering - April 2008 - Asset Management (Page 55) Broadcast Engineering - April 2008 - Advertisers Index (Page 56) Broadcast Engineering - April 2008 - Advertisers Index (Page Cover3) Broadcast Engineering - April 2008 - Advertisers Index (Page Cover4)
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