MP3 pakning

En forklaring:

Joint stereo coding takes advantage of the fact that both channels of a stereo channel pair contain far the same information.

These stereophonic irrelevancies and redundancies are exploited to reduce the total bitrate. Joint stereo is used in cases where only low bitrates are available but stereo signals are desired.

En anden forklaring:

In the case of a stereophonic signal, the MP3 format can then use a few more tools, reffered as Joint Stereo (JS) coding, to further shrink the compressed file size.

In many mid-range Hi-fi sets , there is a unique subwoofer. However you usually do not have the feeling that the sound comes from this boomer, but rather from satellite speakers. Indeed for very low and very high frequencies, the human ear is no longer able to locate the spacial origin of sounds with full accuracy. The mp3 format can therefore (optionally) revert to such a trick by using what is called Intensity Stereo (IS). Some frequencies are then recorded as a monophonic signal followed by a few additional information in order to restore a minimum of spatialisation.

The second joint stereo tool is called Mid/Side (M/S) stereo. When the left and the right channels are quite similar, then a middle (L+R) and a side (L-R) channels are encoded instead of left and right. This allows to reduce the final file size by using less bits for the side channel. During playback, the MP3 decoder will reconstruct the left and right channels.

http://pub41.ezboard.com/fr3mixfrm1.showMessage?topicID=626.topic

Så jeg tror ikke det er optimalt til Surround, da der vil mangle nogle informationer...

Jeg blev ikke helt med hvad der er bedst at pakke i, især i ædre pakkeprogrammer er det kun muligt at pakke i \"stereo\", mens nogle nyere pakke programmer kun har muligheden \"Joint stereo\", andre nye har begge muligheder.

Hvad er bedst ?

Stereo er absolut bedst, joint stereo benyttes til at lave lydfilerne en smule mindre...med tab af kvalitet.

Okey, så blev jeg så meget klogere. Men ved du så hvorfor at et program som f.eks. Audio Catalyst kun har mulighed for at pakke i Joint stereo ? Der er en del personer som mener at det er en godt pakkeprogram.

Jeg mener at Audio Catalyst stinker, de er vist gået sammen med Xing, der godtnok har en hurtig encoder, men den har ret lave kvalitet.

Så hellere bruge Audiograbber, sammen med Blade .dll\'en (det bedste mp3 codec jeg har mødt)

Jeg har en ældre version af Audiograbber, hvordan får man den til at bruge sidste nye blade.dll ? Kan dll. filen downloades, og indsættes ?

Er det noget med at nyere versioner af audiograbber kan pakke mp3 filer i rammen, istedet for at bruge harddisken ?

Du kan hente både Audiograbber og et lign codec (lame.dll) på: http://www.audiograbber.com-us.net/download.html

Det er vist lige så godt som blade.dll!

Det er bare helt kanon, tak for hjælpen !

AudioGrabber er rigtig fed.