WMV 9 refers to a video codec developed by Microsoft which conforms to the Society of Motion Picture and Television Engineers (SMPTE) VC-1 standard to provide high-quality video for streaming and downloading.

SurfWare-Media 5.0 multimedia processing package is an established convergence technology, featuring decoders for WMV 9. It also allows for the transcoding and distribution of resulting files in a variety of other video formats.

The WMV 9 Series includes an advanced profile which supports interlaced video content. In the past, interlaced video content was always de-interlaced before encoding with the Windows Media Video codec. Now, encoding applications such as Windows Media 9 are able to support the compression of interlaced content without having to first convert it to progressive content. The advantage of this advancement is that the interlaced content may be viewed directly on an interlaced device, such as a television.

Furthermore, the advanced portfolio allows for transport independence, enabling the delivery of WMV 9's Advanced Profile over systems that are not Windows Media-based. Systems such as standards-based broadcast infrastructures (via MPEG-2 transport streams), wireless infrastructures (using real-time transfer protocol [RTP]), or even DVDs.

http://www.smpte.org
SMPTE official site – able to purchase VC-1 standards

http://en.wikipedia.org/wiki/VC-1
Wikipedia VC-1 article

http://www.microsoft.com/windows/windowsmedia/forpros/events/NAB2005/
VC-1.aspx
Microsoft General Information

http://msdn.microsoft.com/library/default.asp?url=/library/en-
us/wmform/htm/introducingwindowsmediaformat.asp
Microsoft Software development kit

http://www.microsoft.com/windows/windowsmedia/howto/articles/codecs.aspx
Microsoft Codecs page

http://www.digitalpreservation.gov/formats/fdd/fdd000095.shtml
More Information about WMV 9

http://www.digitalpreservation.gov/formats/fdd/fdd000091.shtml
Information about Windows Media Video