Broadcast Engineering - April 2008 - (Page 38) FEATURE QOE FOR IPTV END USERS is busy processing other IP packets. Once these IP packets are processed, the network device selects the next packet in the buffer queue. The number of queues supported by routers will vary Scenario 1: Ideal network conditions Interpacket gap 1.5ms according to the number of services that are supported across the network. The process of queuing packets is illustrated by the following example. Suppose a broadcast IP streaming server sends an H.264 compressed IPTV multicast channel onto a distribution network at a constant bit rate (CBR) of 2.5Mb/s. Some of the potential network traffic patterns Interpacket gap 1.5ms Interpacket gap 1.5ms Interpacket gap 1.5ms IPTV content server Distribution router Interpacket gap 3.5ms Aggregation router Interpacket gap 3.5ms Interpacket gap 3.5ms Interpacket gap 3.5ms Scenario 2: Mini-burst conditions IPTV content server Distribution router Aggregation router Scenario 3: Triple-play network traffic pattern Web server Interpacket gap 2.5ms Interpacket gap 2.5ms IPTV content server Distribution router Aggregation router VoIP server Figure 1. Potential IPTV traffic patterns Freedom… Link Research, innovators in RF and wireless camera systems, add brilliance to moving news See Link at and sports programmes. NAB Booth Always striding forwards, we’re creating new C1807B solutions for wireless cameras and cellular sites, to give you faster breaking news, bigger live sports coverage and more freedom in the studio. …to broadcast any time, any place, any shot Link’s modular L1500 for SD and HD is more flexible than ever, with a choice of accessories, frequencies and camera control options. Perfect for any landscape. From the crowded city to the stadium or race track – one system works everywhere. Contact us today and we’ll change your view forever. www.linkres.co.uk tel (UK): +44 (0)1923 474060 tel (Singapore): +65 9823 9495 e: sales@linkres.co.uk 38 broadcastengineeringworld.com | April 2008 http://www.linkres.co.uk http://www.linkres.co.uk 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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