Windows Media Audio is a new audio format introduced by Microsoft, which is as famous as MP3 format. WMA surpasses MP3 in compression ratio and sound quality, and is far superior to RA(Real Audio), so it can produce better sound quality even at a lower sampling frequency.
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Wma format characteristics
WMA can be used for coded files of various formats. Applications can use the Windows Media Format SDK to encode and decode WMA formats.
Some common applications supporting WMA include Windows Media Player, Windows Media Encoder, RealPlayer, Winamp, etc. Other platforms, such as software and hardware in Linux and mobile devices, also support this format.
1, advantages
WMA after WMA 7 supports certificate encryption. Without permission (that is, without a license certificate), even if it is illegally copied to the local area, it is impossible to listen. At the same time, Microsoft's original claim that the same file, the same sound quality, is twice as small as MP3 has also been fulfilled.
In fact, this statement only applies to low bit rates. In addition, Microsoft has greatly improved the engine in WMA 9, which is almost smaller than MP3 1/3 under the same file and sound quality, and is very suitable for network streaming media and mobile devices.
2. Deficiencies
High bit rate has low rendering ability. Compared with WMA 192 kbps, the 320kbps MP3 with the same sound source has better sound quality and rendering power. Like MP3, WMA is a file format that weakens data compression, and WMA is not suitable for demanding users.
(Version 9.0 supports lossless compression) In addition, WMA, like MP3, is a patented file format. Supported devices need to purchase copyright.
Wma format is the same as avi format and mp4 format. It has sound and images. But mp3 doesn't support avi. Mp4 format only supports wma.
Baidu encyclopedia -WMA format