![]() In the near future, hardware acceleration of decoding will also make playback of both 720p and 1080p content possible even on midrange Pentium 4 class computers." WMV9_PRO offers variable bit rate encoding that provides "optimal quality with a lower average bit rate and file size." Its efficiency can bring high-definition quality to computer users, enabling storage and delivery of a complete movie at 720p resolution (1280 x 720 pixels per frame), with 5.1 digital discrete channel surround sound, on a single standard DVD. Windows Media Video 9 Professional defines profiles of the Windows Media Video 9 codec that are automatically applied at higher bit rates and resolutions. The Microsoft Windows Media web site codecs page is regularly edited and updated (see links listed in Useful references below) in 2004, the text included this note: "For content that requires ultra-high video quality. ![]() Moderate to excellent, considering this is a compression algorithm, varies according to level selected. See ASF for link to pages covering licensing of Windows Media and the Advanced Systems Format.ĭepends upon algorithms and tools to read will require sophistication to build tools. Generally used in files that represent a final-state format for end-user delivery. Comments on the best way to elucidate this topic are welcome. At this Library of Congress Web site, the VC-1 connection is highlighted in the description of WMV9, the fundamental Windows Media video codec. At the same time, a number of profiles and levels were established for example, see the Wikipedia VC-1 article and this Microsoft information page (link available through Internet Archive). During 2006, however, SMPTE finalized the VC-1 standard (421M), thus placing the Microsoft video codec family more in the mainstream. During 2005, the Microsoft Web site stopped referring to a "professional" codec and instead began promoting an Advanced Profile with features tailored to high definition video content (see Notes below). This format description seems to have been overtaken by events. However, the spec doesn't indicate which video codecs will support HTML 5.Video bitstream produced by the Windows Media 9 professional video codec. The HTML 5 spec, currently under development by the Worldwide Web Consortium, promises to enable native Web browser support for video playback. Lately, video codecs have made the news, mostly because of disputes among browser makers with regard to HTML 5 support. VC-1 is supported by various devices, such as Blu-ray disc players, mobile devices, video cameras, set-top boxes and game machines, including Microsoft's Xbox 360 video game console. The patents for technologies used in VC-1 are held by a number of companies (including Microsoft) under MPEG LA, which controls licensing of the video codec. VC-1 follows standards set by the Society of Motion Picture and Television Engineers (SMPTE) and is formally known as "SMPTE 421M." Microsoft contributed the VC-1 technology in its Windows Media Player 9 video player product for the SMPTE standard, according to a Microsoft technical overview article, which describes the two technologies as being "functionally equivalent." Microsoft is currently investigating the issue, the article states, without indicating when a resolution will be found. ![]() ![]() VC-1 currently does not use all of the cores in processing video on three-core and six-core computer systems, according to a Microsoft support article. Microsoft last week acknowledged that the VC-1 video codec has limited performance on multicore systems running Windows 7. News Windows 7 Limited on VC-1 Video Codec Use ![]()
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