The Digital Fact Book - Quantel

Windows MediaAudio and video compression schemes, encoders and decoders (players) devisedby Microsoft. The latest Windows Media 9 (WM9) uses the VC-1 compression codecwith similar efficiency as MPEG-4 H.264/AVC.WirelessHD (WiHD)A formal special interest group comprising consumer electronics and other technologycompanies (LG Electronics, Matsushita (Panasonic), NEC, Samsung, SiBEAM, Sonyand Toshiba), formed to promote and enable the rapid adoption, standardization andmulti-vendor interoperability of WirelessHD technology worldwide. It will provide a wirelessdigital interface to combine uncompressed high-definition video, multi-channel audio,intelligent format and control data, and Hollywood-approved content protection. It meansthe elimination of audio and video cables and short distance limitations. First-generationimplementation high-speed rates range from 2-5 Gb/s for CE, PC, and portable devices,with up to 20 Gb/s eventually possible.WM9 and WMVSee: VC-1Word clockClock information associated with AES/EBU digital audio channels. Synchronous audiosampled at 48 kHz is most commonly used in TV. The clock is needed to synchronizethe audio data so it can be read.See also: AES/EBU audioWWorkflowLiterally, the flow of work. The wide-scale adoption of digital technology in the productionchain of television and media in general has produced many possibilities for arrangingexactly where and in what order the various required steps are done. This can be oneof the big advantages of ‘digital’. In many cases this does not follow the traditional analogpath where there were few, if any, choices. Today there are any number of ways to arrangeworkflows but only the good ones will offer the most efficient and fast way of achievingresults. Important elements are ensuring there are no bottlenecks – powerful enoughprocessing to achieve fast results and fast connections to make sure data is available whereand when you want it. Often the better workflows involve less movement of data as moretasks are completed in one area.Workflow patterns are altered by technology. For example, traditional film grading iscompleted prior to editing and any visual effects work. Today it is possible to edit a digitalfilm and then grade while seeing the material in context.180