Broadcast Engineering - April 2008 - (Page 40) FEATURE QOE FOR IPTV END USERS tern is considered ideal and will deliver a high-quality TV signal to the end user. The packets are evenly spaced, and the bit rate remains constant throughout the network path. In the second scenario, picture viewing problems are more likely because the buffer does not fill fast enough, and the feed to the decoder does not happen at a constant rate. In the third scenario illustrated, the stream of IP packets is flowing too Scenario 1: Lossless IP stream at a constant bit rate IPTV consumer device buffer IPTV content server Interpacket (even distances) and moving at a constant bit rate Decoder Packet rate remains constant Scenario 2: Poor-quality IPTV stream resulting from buffer underrun at IPTV consumer device IPTV consumer device buffer IPTV content server Large interpacket gaps present in stream Decoder No packets entering the buffer, which is causing viewing difficulties Scenario 3: Poor-quality IPTV stream resulting from buffer overrun at IPTV consumer device IPTV consumer device buffer IPTV content server Short interpacket gaps present in stream Decoder Dropped IPTV packets Packet rate has leveled out, however packets have been lost in the buffer, which creates video impairments Figure 2. Different jitter patterns across an IPTV network CROSS-PLATFORM, FRIENDLY, YOURS! Platform independent newsroom computer system that combines the best of previous OCTOPUS versions with the greatest newsroom users’ ideas and the latest technology. � Platform Independent � Robust Architecture � No popup windows � Single tap search � Sticky preferences � Rundown buddy Take advantage of all platforms! Is your newsroom Windows based and edit suites running on MacOS? With OCTOPUS 6 your newsroom reaches all the platforms natively, no virtual machines need to be installed. You can even consider saving some resources by using Linux on your desktops. � � More info at www.octopus-news.com Visit us at NAB, stand N2838 40 broadcastengineeringworld.com | April 2008 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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