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13 - VC-1

Posted in Neothings by bill on the April 10th, 2006
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From Wikipedia.org http://en.wikipedia.org/wiki/VC-1
VC-1 is the informal name of the SMPTE standard 421M describing a video codec based on Windows Media Video version 9. On April 3, 2006, SMPTE announced the formal release of the VC-1 standard as SMPTE 421M.
It is an evolution of the conventional DCT-based video codec design also found in H.261, H.263, MPEG-1, MPEG-2, and MPEG-4. It is widely characterized as an alternative to the latest ITU-T and MPEG video codec standard known as H.264 (a.k.a. AVC a.k.a. MPEG-4 Part 10). Although VC-1 and WMV9 refer to the same codec technology as far as Microsoft is concerned, VC-1 is actually a superset of WMV9, containing more coding tools for interlaced video sequences than the original WMV9 codec which concentrated on progressive encoding for computer displays. The main goal of VC-1/WMV9 Advanced Profile development and standardization was to support the compression of interlaced content without first converting it to progressive, making the codec more attractive to broadcast and video industry professionals.
Although widely considered to be Microsoft’s product, there are actually 15 other companies in the VC-1 patent pool (as of April 2006). As a SMPTE standard, VC-1 is open to implementation by 3rd parties which in turn have to pay licensing fees to the MPEG-LA licensing body.
Both HD-DVD and Blu-ray Disc have adopted VC-1 as a mandatory codec, meaning all video playback devices will be capable of decoding and playing video-content compressed using VC-1.
The FFmpeg project is already working on a free implementation of this codec.
An interesting note is that Microsoft has designated VC-1 as the Xbox 360 video game console’s official video codec, and game developers will use VC-1 for full motion video included with games.

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