The full name of WMA is Windows Media Audio, a new audio format that Microsoft has introduced as a MP3 format. Because WMA is more than MP3 in terms of compression ratio and sound quality, it is far better than RA (real Audio), which produces better sound quality even at lower sampling frequencies.
Microsoft said the WMA format has a considerable copyright protection, can even limit the playing machine, playback time and number of times, can effectively prevent piracy. As you all know, since the early 90 's, lossy audio coding has undergone a golden period of development, the popular MP3 coding program is in this period of growth and become the most popular computer users of digital audio products, it to 128kbps data rate to achieve acceptable quality, has been recognized by the overwhelming majority of users, but in the high compression ratio of the sound quality is not satisfying, with the Internet and the development of digital audio equipment, the demand for higher quality and higher compression ratio of the voice is more and more high, after the emergence of TWINVQ (file name extension VQF), Microsoft WMA, the United States Thomson Multimedia Company (Thomson multimedia SA) and mp3PRO of the Francheves Association (Fraunhofer Institute) all claimed to be able to achieve better results than MP3 under the same low data rate conditions.