MP3 - definição. O que é MP3. Significado, conceito
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O que (quem) é MP3 - definição

OPEN STANDARD LOSSY COMPRESSION FORMAT FOR DIGITAL AUDIO
Data compression/MP3; Mp3; .mp3; MPEG Layer III; Mp3 files; MPEG-1 Audio Layer 3; Mp3s; MP3 audio; MP3 Audio; MP3 sound; MP3 Sound; MP3 Track; MP3 track; MP3 music; MP3 Music; MPEG Audio Layer 3; Mp3 download; MPEG-1 Audio Layer III; MP3 Downloader; MPEG-1 Layer III; MPEG-1 Layer 3; MP3G; Mp3 encoder; .MP3; MP3 (file format); PXFM; MP 3; MP3 file; MP£; MPEG-2 Audio Layer III; MPEG-2 Layer III; MPEG 1 Audio, Layer 3; MPEG-2 Audio Layer 3; MP3 download; Motion Picture Experts Group Audio Layer 3; MP3 encoding; Audio/mpeg; .mp3 file

MP3         
MP3 is a kind of technology which enables you to record and play music from the Internet.
N-UNCOUNT
MP3         
¦ noun a means of compressing a sound sequence into a very small file, used as a way of downloading audio files from the Internet.
Origin
from MPEG + Audio Layer-3.
MP3         

Wikipédia

MP3

MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany under the lead of Karlheinz Brandenburg, with support from other digital scientists in the United States and elsewhere. Originally defined as the third audio format of the MPEG-1 standard, it was retained and further extended — defining additional bit-rates and support for more audio channels — as the third audio format of the subsequent MPEG-2 standard. A third version, known as MPEG 2.5 — extended to better support lower bit rates — is commonly implemented, but is not a recognized standard.

MP3 (or mp3) as a file format commonly designates files containing an elementary stream of MPEG-1 Audio or MPEG-2 Audio encoded data, without other complexities of the MP3 standard.

With regard to audio compression (the aspect of the standard most apparent to end-users, and for which it is best known), MP3 uses lossy data-compression to encode data using inexact approximations and the partial discarding of data. This allows a large reduction in file sizes when compared to uncompressed audio. The combination of small size and acceptable fidelity led to a boom in the distribution of music over the Internet in the mid- to late-1990s, with MP3 serving as an enabling technology at a time when bandwidth and storage were still at a premium. The MP3 format soon became associated with controversies surrounding copyright infringement, music piracy, and the file ripping/sharing services MP3.com and Napster, among others. With the advent of portable media players, a product category also including smartphones, MP3 support remains near-universal.

MP3 compression works by reducing (or approximating) the accuracy of certain components of sound that are considered (by psychoacoustic analysis) to be beyond the hearing capabilities of most humans. This method is commonly referred to as perceptual coding or as psychoacoustic modeling. The remaining audio information is then recorded in a space-efficient manner, using MDCT and FFT algorithms. Compared to CD-quality digital audio, MP3 compression can commonly achieve a 75 to 95% reduction in size. For example, an MP3 encoded at a constant bitrate of 128 kbit/s would result in a file approximately 9% of the size of the original CD audio. In the early 2000s, compact disc players increasingly adopted support for playback of MP3 files on data CDs.

The Moving Picture Experts Group (MPEG) designed MP3 as part of its MPEG-1, and later MPEG-2, standards. MPEG-1 Audio (MPEG-1 Part 3), which included MPEG-1 Audio Layer I, II and III, was approved as a committee draft for an ISO/IEC standard in 1991, finalised in 1992, and published in 1993 as ISO/IEC 11172-3:1993. An MPEG-2 Audio (MPEG-2 Part 3) extension with lower sample- and bit-rates was published in 1995 as ISO/IEC 13818-3:1995. It requires only minimal modifications to existing MPEG-1 decoders (recognition of the MPEG-2 bit in the header and addition of the new lower sample and bit rates).

Exemplos do corpo de texto para MP3
1. Now you‘ve got an iPod or similar MP3 player, and you‘re considering buying the MP3 version.
2. MP3 players favour personal playlists or shuffling.
3. Listen to the session on your computer or MP3 player.
4. PodcastListen to the interview here (mp3, 27min 53 sec)
5. Nelson has more than 80 versions on his MP3 player.