| Codec | Company | Description |
| Windows Media Audio | Microsoft | This codec is
used to encode complex audio files, such as music files. The most recent
versions of this codec are the Windows Media Audio 9 codec and the Windows
Media Audio 9.1 codec. |
| Windows Media Audio
Professional | Microsoft | This codec is used to encode complex
audio files, such as music files. This codec supports multichannel
encoding and 24-bit encoding. Two versions of this codec are the Windows Media
Audio 9 Professional codec and the Windows Media Audio 9.1 Professional
codec. |
| Windows Media Audio 9 Lossless | Microsoft | This
codec is used for lossless encoding of audio files. Two versions of this codec
are the Windows Media Audio 9 Lossless codec, and the Windows Media Audio 9.1
Lossless codec. |
| Windows Media Audio 9 Voice | Microsoft | This
codec is optimized for encoding the human voice at a high compression ratio.
This codec is the preferred codec for encoding data streams that primarily
consist of spoken words. For content that is a mixture of music and speech,
this codec yields a very high quality audio file. |
| Windows Media Video 9 | Microsoft | This codec is
used to encode complex video files, such as movie files. The Windows Media
Video 9 Advanced Profile Video codec is a version of this codec. The Windows
Media Video 9 Advanced Profile Video codec is incorporated into advanced
encoding features such as interlaced encoding. |
| Windows Media Video 9 Screen | Microsoft | This
codec is optimized for encoding sequential screen shots. For example, this
codec is frequently used to record screen shots of monitor images of software
applications. The monitor images are later used for software training. |
| Windows Media Video 9 Image | Microsoft | This
codec is used to convert bitmap images with the deformation information into a
compressed video. Two versions of this codec are the Windows Media Video 9 Image
codec, and the Windows Media Video 9 Image v2 codec. |
