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Care este diferenta intre mp3 si mp4?

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file format fisiere format video audio layer

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4848

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08-04-2005 20:30:20

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(5.00 - 2 voturi)

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Raspunsuri

Comentariul lui:

oana

08-04-2005 21:43:25

Data:

marea diferenta, din cate stiu eu, e ca mp3 e numai pt audio iar mp4 e pt audio si/sau video.

acuma uite si 2 definitii mai... de specialitate :)

MP3 (ordinarily referring to MPEG-1 Audio Layer 3, more formally known as MPEG-1 Part 3 Layer 3 or ISO/IEC 11172-3 Layer 3) is an audio compression format capable of a great reduction in the amount of data required to reproduce audio, while sounding like a faithful reproduction of the original uncompressed audio to most listeners. MP3 has become widespread and thus informally refers also to sound or music recording stored on computer devices as files. Reportedly, the .mp3 filename extension is also sometimes used on audio files encoded using the newer MPEG-2 Audio Layer 3 standard (a.k.a. MPEG-2 Part 3 Layer 3 or ISO/IEC 13818-3 Layer 3). (http://en.wikipedia.org/wiki/MP3)

MPEG-4 Part 14 or *.mp4, is a file format specified as a part of the ISO/IEC MPEG-4 international standard. It is used to store media types defined by the ISO/IEC Moving Picture Experts Group, and can be used to store other media types as well. It is, or will be, typically used to store data in files, though it will be used in data streams and possibly in other ways.
*.mp4 allows streaming over the internet. It also allows multiplexing of multiple video and audio streams in one file, variable frame- and bit-rates, subtitles and still images. Apple's QuickTime file format was the start point design of the *.mp4 file format. Although still very reminiscent of each other, *.mp4 has changed and been improved in many different ways apart from *.mov that they are really not the same file format anymore. (http://en.wikipedia.org/wiki/MP4)

Comentariu

Voturi:

31 Voteaza

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Comentariul lui:

mihai

08-04-2005 23:19:26

Data:

good po!nt ;)

Comentariu

Voturi:

29 Voteaza

Comentariul lui:

mizdan

08-04-2005 23:44:49

Data:

Cand zici MP4 cred ca te referi de fapt la AAC (advanced audio coding). Vorbim, deci, scrict de partea audio MP4.
Avantaje MP4 (strict tehnic) :))

- esantione de frecventa intre 8KHz si 96 KHz..mp3 folosea intre 16 si 48khz

- o manipulare mult mai buna a spectrului de frecventa peste 16KHz ( daca te uiti in winamp la osciloscop o sa vezi ca in partea dreapta a graficului spectrul nu prea variaza)

Ce inseamna asta?
Pe scurt: pentru fisierele cu bitrate mic se va auzi mult mai bine!!!
ca un expemlu: bitrate:96 kbit/sec MP4 e la fel de ok ca si 128 kbit/s MP3

io zic ca e destul nu?

Raspuns acceptat

Voturi:

27 Voteaza

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Comentariul lui:

monix

16-04-2005 22:23:42

Data:

cu toate ca mp4 e mai bun ca mp3-ul, mp4-ul nu se potriveste cu mp3playerul. din cate stiu eu, in us sau in canada inca nu a aparut mp4playere... s-ar putea sa ma insel si sa se cheme altfel....

Comentariu

Voturi:

22 Voteaza

Comentariul lui:

nomax

22-04-2005 17:21:18

Data:

Formatul mp4 este formatu cel mai comprimat format de muzica... il poate citi winampul.

Comentariu

Voturi:

24 Voteaza

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Comentariul lui:

babynoza

31-03-2011 10:15:22

Data:

Mp4 e o metoda de compresie pentru fisiere video, mp3 idem pentru fisiere audio.

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Voturi:

17 Voteaza

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