Broadcast Engineering - April 2008 - (Page 21) TECHNOLOGY IN ACTION BEYOND THE HEADLINES Paris, for their assistance with this article. Ted Taylor is a director of the Media Asset Capital partnership. is therefore the result of a choice of a family of spatio-temporal directions and a set of different interpolations along these directions. A criterion has to be found to choose one estimator. This criterion has to be comparative, and one uses a mathematical norm on the video signal. A total variation norm measures the amplitude of oscillations and variations of the image (jaggies and flickers are spatio-temporal oscillatory artifacts), without penalizing discontinuities. The total variation of an image is essentially proportional to the total length of edges, whether these edges are discontinuous or smooth transitions. When the search for a best directional interpolation is limited to a spatio-temporal neighborhood that is too small, the best estimator may not be ideal. A spatio-temporal bandlet thresholding regularizes the estimation with a spatio-temporal geometric flow that is derived from the directions of the computed best interpolators. Per pixel cadence A film frame is divided into two or three fields corresponding to even or odd rows. The deinterlacing should replace each field by the corresponding full frame. This requires copying appropriate pixels. The deinterlacing of films in video thus requires identifying an appropriate space-time interpolation. From the algorithm’s point of view, this is no different from deinterlacing any other interlaced video content. The result is that the upconversion process is not compromised by mixed cadence sequences. This is important in real-world content with multimedia contributions. User reaction Thanks to some pioneering work by academics from outside the broadcast industry, a new generation of format conversion products is emerging, which breaks the established quality/ cost barriers to the benefit of broad- casters and viewers alike. Recent field trials and customer evaluations have indicated that this affordable and practical new technology will indeed raise the expectations for quality and consistency in upconversion. BE The author would like to thank Steve Sherlock from Brick House Video Ltd and the engineering team at Let It Wave, April 2008 | broadcastengineeringworld.com 21 http://community.broadcastengineering.com/forums 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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