MP3
Ing MPEG-1 Audio Layer 3, a mas maralas dang ausang MP3, metung yang encoding format para king digital audio a gagamit king metung a uri ning lossy data compression.
| MPEG-1 Audio Layer 3 | |
|---|---|
| File extension | .mp3
|
| MIME type | audio/mpeg
|
| Type of format | Audio |
Maralas yang magagamit iti para king pamanyimpan king consumer audio (deng patigtig o katni para king pansariling/personal a gamit). Metung ya muring de facto standard a encoding para king pamanalis ampong pamipatigtig king musika kareng digital audio player.
Metung yang format a audio-specific (bukud mung kareng tigtigan o katni) a diniseniu da reng mapilan a lupung da reng inieru king Fraunhofer IIS king in Erlangen, Alemania, AT&T-Bell Labs king Murray Hill, NJ, USA, Thomson-Brandt, ampong CCETT. Metanggap ya antimong ISO/IEC standard kanitang 1991.
Gagamit yang lossy compression algorithm ing MP3 bang mabawas mayap ing kantidad o karakal ning data a kailangan ba yang dalan ing data recording kabang manatili yang malapit ketang orihinal a audio (tigtigan o katni) a e mesiksik (uncompressed) para kareng keraklan a makiramdam. Nanupata, e re tuturing a high fidelity audio deng audiophile (mahilig king pamakiramdam musika). Ing metung a simpan (file) a MP3 a melalang king mid-range (kasantingan o makalibutad) a bitrate setting a 128 kbit/s, mamie yang simpan a metung a kapulu (1/10th) ning dagul ning CD a melalang ketang orihinal a pikuanan ning tigtigan. Maliaring maglalang simpan a MP3 king mas matas o mas mabanang bitrate, at mas matas o mas mababa ing kalidad a lunto. Gagana iting pamanyiksik (compression) kapamilata'ning pamagbawas king panga-saktu (accuracy) da reng mapilan a dake ning katni (parts of sound) a tuturing dang lagpus king daramdaman ding keraklan da reng tau. Keraklan, ausan dang Perceptual Coding iti. [1] Kilub na niti, babie yang pamilarawan o pamag-representa ning katni kilub ning makuyad (short term) a time/frequency analysis window, kapamilatan ning pamangamit kareng modelung psychoacoustic ba lang idayû o bawasan ing panga-saktu da reng dakeng e ra making daramdaman deng tau, at pamag-record king matalab o episienting paralan ketang mitatagan a impormasiun. E malaut iti kareng prinsipiu o paralan a ginamit da king JPEG, metung a format a magagamit king pamanyiksik larawan (image compression format).
Panaliling/Alternatibung teknolohiya
mag-editDakal la pa reng aliwang audio codec, lossy man o lossless. Pareu la pamilia king MP3 deng mp3PRO, AAC, ampong MP2, at magdependi la king alus miwawangis a psychoacoustic model. Ing Fraunhofer Gesellschaft murin ing makibandi kareng dakal karing pekamaulagang patent a nung nu la makabasi deting codec, kabang deng Dolby Labs, Sony, Thomson Consumer Electronics, ampong AT&T naman ing tatalan kareng aliwa.
Lon la murin deti
mag-editDalerayan
mag-edit- ↑ Jayant, N. S., Johnston, J. D. and Safranek, R. J. (1993–10). "Signal compression based on models of human perception". Proc. IEEE, Oct. 1993, pp. 1385-1422.
Suglung palual
mag-edit- Fraunhofer IIS
- The Story of MP3 — How MP3 was invented, by Fraunhofer IIS