Bitrate relation at transcoding from MP3 to AC3

[yup]

Hi folk!
Now I want transcode my collection of MP3 music to AC3 (my standalone player do not read MP3). How choose speed for transcoding? AC3 better compressor than DD? For example which AC3 will be enough for 320kb/s CBR MP3? May be very important AC3 encoder? Now i use Besweet and Adobe Encore.
With kind regards yup.

[jimmy basushi]

your post is a little hard to follow, so please bare with me if i make a few mistakes..

dd = dolby digital, which is generally how people refer to ac3. adobe is a good ac3 encoder i believe. you wont keep all your quality from the 320 mp3, so you could drop the bitrate slightly, but anything above 250ish should be unnoticable even transcoding.

[yup]

immy basushi thanx for reply.
If I right understand I can litle drop bitrate from MP3 to AC3 without quality loss.
For 320kb/s CBR MP3 enough 256kb/s AC3 Dolby Digital 2.0.
With kind regards yup.

[stephanV]

Originally posted by yup
If I right understand I can litle drop bitrate from MP3 to AC3 without quality loss.

no, re-encoding with (another) lossy codec will always lead to quality loss. whether it is noticeable/acceptable or not? well, listen for yourself :)

[yup]

stephanV :)
Best way decode as wav without compression, or may be Dolby Digital 2.0 448kb/s enough?
yup.

[stephanV]

well, decoding to wav would give you an enormous file size so i wouldn't do that.

just encode to 256kbps AC3 Dolby Digital 2.0 and see (listen i guess :D) if you find the sound acceptable. if you do, then thats fine. if you don't then try a higher bitrate. what is acceptable is quite subjective: best way is to judge that for yourself. I can tell you 256 kbps sounds like cr4p (which i actually don't know, I've never tested it), but you shouldn't believe me or anyone when they make such claims out of the blue. I'm already quite happy with +/-192 kbps MP3 (for most music at least), which maybe other people find horrible.

there are no ears like your own. after all, you are going to be the one who has to listen to it. ;)

[yup]

stephanV
that means cr4p.
yup.

[Soulhunter]

Originally posted by yup
that means cr4p
When that = what then 4 = a !!!

Someone should post a tranlation list for this stuff... :D


Bye

[hendrix]

Originally posted by yup
stephanV :)
Best way decode as wav without compression, or may be Dolby Digital 2.0 448kb/s enough?
yup.

2.0 @ 448kbs will just be wasting space - 448 is used for 5.1
192kbs is good enough for 2.0 has a audio bandwidth of 20khz, you can even try 256kbs if 192 isn't good enough...of course you should use a Dolby Licenced encoder and not Besweet if quality is your thing