![]() More commonly referred to as an MP3 player, a digital audio player or "DAP" is a portable, handheld digital music player that stores, organizes and plays MP3 and often other audio files. Similar principles are used by JPEG, an image compression format. ![]() It provides a representation of pulse-code modulation - encoded audio in much less space than straightforward methods, by using psychoacoustic models to discard components less audible to human hearing, and recording the remaining information in an efficient manner. ![]() ![]() The compression removes certain parts of sound that are outside the hearing range of most people. It was invented by a team of European engineers at Philips, CCETT (Centre commun d'études de télévision et télécommunications), IRT and Fraunhofer Society, who worked in the framework of the EUREKA 147 DAB digital radio research program, and it became an ISO/IEC standard in 1991. It uses a lossy compression algorithm that is designed to greatly reduce the amount of data required to represent the audio recording, yet still sound like a faithful reproduction of the original uncompressed audio to most listeners. MPEG-1 Audio Layer 3, more commonly referred to as MP3, is an audio encoding format.
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