MP3 is a revolutionary digital audio format developed by Fraunhofer-Gesellschaft and Thompson Multimedia in the late and brought to the mainstream through the Internet . mp3 is short for MPEG (Moving Pictures Experts Group),the group that help make mp3an international standard.
mp3 is a compressed audio format that allows for smaller file sizes with similar sound quality to pcm wav format, the format found on normal music cds you would buy in a store.
Thompson and Fraunhofer helped develop the coding algorithm, or system of rules and processes, that encoded audio to this incredible format. For more on exactly how this encoding technology works.
why mp3 is Popular?The popularity of MP3 comes from its practical uses. Music tracks in wav format are extremely large in file size, averaging around 50MB in size. Since it is so large, it is not practical to send wav files through email or offer them for download on the Internet.
mp3, however, compresses audio on average of times smaller than the original size. The result is audio tracks around 4 mb in size, perfect for downloading and sending through the Internet. Thus, custom mp3 format CDs can be created with times the amount of tracks of a normal track audio , producing cds with over tracks easily. The format is also popular for turning your PC into a jukebox of hundreds or thousands of songs or loading them into a portable mp3 player and taking your music collection wherever you want.
The use in mp3 of a lossy compression algorithm is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An mp3 file can also be constructed at higher or lower bit rates, with higher or lower resulting quality.
The compression works by reducing accuracy of certain parts of sound that are deemed beyond the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. It uses psychoacoustic models to discard or reduce precision of components less audible to human hearing, and then records the remaining information in an efficient manner
This technique is often presented as relatively conceptually similar to the principles , an image compression format. The specific algorithms, however, are rather different: jpeg uses a built-in vision model that is very widely tuned (as is necessary for images), while mp3 uses a complex, precise masking model that is much more signal dependent.
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