The format of the advanced (ASF) is a file format extensible is that, in order for a service and broadcast disciplines (streams) digital synchronous (synchronized), and transferring them in a network of computer etc. design. ASF includes The for content-based audio media of Windows (Windows Media Audio) and video media Windows (Windows Media Video). The extension WMA or WMV to specify a file, ASF will be used in such a manner that this file contains the contents of the code by the code manufacturer (coder) of the MWA and WMV. The format SDK is format media be to create and read files of media Windows used and as files of ASF include other types of , compressed, or compaction Walmart (uncompressed Data), as an example.