218 Chapter 9 CONFORMING AND FINISHING Avid Media Composer provides three different uncompressed media formats: 1:1 OMF: 8-bit 4:2:2 Y C B C R uncompressed OMF media. This type of media is stored in OMFI MediaFiles folders on your media drives. 1:1 MXF: 8-bit 4:2:2 Y C B C R uncompressed MXF media. This type of media is stored in Avid MediaFiles folders on your media drives. 1:1 10b MXF: 10-bit 4:2:2 Y C B C R uncompressed MXF media. This type of media is stored in Avid MediaFiles fold- ers on your media drives. As mentioned earlier in this handbook, only MXF can store 10-bit media on Avid. Choosing the Finishing Resolution: High Definition Avid systems support both uncompressed and compressed HD media. Depending on your finishing requirements, you may find that compressed media files are more than sufficient. However, if your project contains extensive keying and compositing, you may prefer to work with uncompressed HD media. All HD media are stored in the MXF format in the Avid MediaFiles folders on your media drives. The following HD media types are available: 1:1 10b HD: 10-bit 4:2:2 Y C B C R full-raster (1920 1080 or 1280 720) uncompressed media. 1:1 HD: 8-bit 4:2:2 Y C B C R full-raster (1920 1080 or 1280 720) uncompressed media. Avid DNxHD: Mastering-quality compressed HD media. The DNxHD family of resolutions provides both 8- and 10- bit, extremely high-quality, full-raster compressed media. Multiple compression levels are provided for each HD for- mat. All of the DNxHD resolutions are considered master- ing quality and an equivalent or higher data rate than either HDCAM, D5 HD, or DVCPRO HD. DNxHD compres- sion and decompression are performed in real time in hardware on the Avid Symphony Nitris. DNxHD media are named by their data rate in megabits/sec- ond instead of the compression level. As the data rate varies based on the HD format and frame rate, the specific numbering of DNxHD media varies from one format to another. For reference, the following resolutions are available in the 1080i/59.94 format: DNxHD 220x: 10-bit 4:2:2 Y C B C R full-raster (1920 1080 or 1280 720) 220 Mbsec compressed media. The