2006-12-20 19:45:52 · 8 answers · asked by Sergio M 1 in Consumer Electronics ➔ Cell Phones & Plans
MPEG Audio Layer 3 = MP3
* Ogg Vorbis from the Xiph.org Foundation, a free software and patent free codec.
* MPEG-1/2 Audio Layer 2 (MP2), MP3's predecessor;
* MPEG-4 AAC, MP3's successor, used by Apple's iTunes Music Store and iPod
* MPC, also known as Musepack (formerly MP+), a derivative of MP2;
* mp3PRO from Thomson Multimedia combining MP3 with SBR;
* AC-3, used in Dolby Digital and DVD;
* ATRAC, used in Sony's Minidisc;
* Windows Media Audio (WMA) from Microsoft.
* QDesign, used in QuickTime at low bitrates;
* AMR-WB+ Enhanced Adaptive Multi Rate WideBand codec, optimized for cellular and other limited bandwidth use;
* RealAudio from RealNetworks, frequently in use for streaming on websites;
* Speex, free software and patent free codec based on CELP specifically designed for speech and VoIP.
mp3PRO, MP3, AAC, and MP2 are all members of the same technological family and depend on roughly similar psychoacoustic models. The Fraunhofer Gesellschaft owns many of the basic patents underlying these codecs, with Dolby Labs, Sony, Thomson Consumer Electronics, and AT&T holding other key patents.
There are also some lossless audio compression methods used on the Internet. While they are not similar to MP3, they are good examples of other compression schemes available. These include:
* FLAC stands for 'Free Lossless Audio Codec'
* Monkey's Audio
* SHN, also known as Shorten
* TTA
* WavPack
* Apple Lossless
Listening tests have attempted to find the best-quality lossy audio codecs at certain bitrates. At 128 kbit/s, Ogg Vorbis, AAC, MPC and WMA Pro tied for first place with LAME MP3 a little behind. At 64 kbit/s, AAC-HE and mp3pro performed marginally better than other codecs. At high bitrates (128 kbit/s+), most people do not hear significant differences. What is considered 'CD quality' is quite subjective.
Though proponents of newer codecs such as WMA and RealAudio have asserted that their respective algorithms can achieve CD quality at 64 kbit/s, listening tests have shown otherwise; however, the quality of these codecs at 64 kbit/s is definitely superior to MP3 at the same bitrate. The developers of the patent-free Ogg Vorbis codec claim that their algorithm surpasses MP3, RealAudio and WMA sound quality, and the listening tests mentioned above support that claim. Thomson claims that its mp3PRO codec achieves CD quality at 64 kbit/s, but listeners have reported that a 64 kbit/s mp3PRO file compares in quality to a 112 kbit/s MP3 file and does not come reasonably close to CD quality until about 80 kbit/s.
MP3, which was designed and tuned for use alongside MPEG-1/2 Video, generally performs poorly on monaural data at less than 48 kbit/s or in stereo at less than 80 kbit/s.
Review By,
David Jeba
IT-Manager
www.univercell.in
davidjeba@univercell.in
2006-12-20 20:04:30 · answer #1 · answered by Anonymous · 0⤊ 0⤋
MP3 is the abbreviation for MPeG1 Audio Layer 3 - where MPeG comes from MovingPicturesExperts Group which is a standard to compress movie data.
2006-12-21 03:48:55 · answer #2 · answered by Joe B 3 · 1⤊ 0⤋
MP means Music Player! Am I right?
2006-12-21 03:48:54 · answer #3 · answered by Rayzel 1 · 0⤊ 0⤋
"MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding and lossy compression format."
2006-12-21 03:47:36 · answer #4 · answered by Baby Doll. 4 · 0⤊ 0⤋
Mpeg
2006-12-21 03:48:06 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Just to let you know.
MPEG stands for "Moving Pictures Experts Group"
2006-12-21 03:51:48 · answer #6 · answered by The Stig 3 · 1⤊ 0⤋
music player
2006-12-21 04:57:18 · answer #7 · answered by •°o.O чĀпИǎĤ O.o°• 3 · 0⤊ 0⤋
media player3 ???????????
2006-12-21 13:07:10 · answer #8 · answered by neethul c 2 · 0⤊ 0⤋