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What is MP3? | MPEG 1 audio layer 3
MPEG: Moving Picture Experts Group
Layer 3 is one of three coding schemes (layer 1, layer 2 and layer 3) for the compression of audio signals. Layer 3 uses perceptual audio coding and psychoacoustic compression to remove all superfluous information (more specifically, the redundant and irrelevant parts of a sound signal. The stuff the human ear doesn't hear anyway).
It also adds a MDCT (Modified Discrete Cosine Transform) that implements a filter bank, increasing the frequency resolution 18 times higher than that of layer 2.
Layer 3 is one of three coding schemes (layer 1, layer 2 and layer 3) for the compression of audio signals. Layer 3 uses perceptual audio coding and psychoacoustic compression to remove all superfluous information (more specifically, the redundant and irrelevant parts of a sound signal. The stuff the human ear doesn't hear anyway).
It also adds a MDCT (Modified Discrete Cosine Transform) that implements a filter bank, increasing the frequency resolution 18 times higher than that of layer 2.
What is WMA? | Windows Media Audio
WMA is an audio file format developed by Microsoft (www.microsoft.com), the maker of Windows Media Player. It may not be as popular as MP3, but it is still supported by a vast number of players and jukeboxes, including Winamp, Sonique, MusicMatch and J. River's Media Jukebox.