A few questions

[Eye of Horus]

Hi,

I am not a complete newbie on ripping, but I am a newbie on this forum. So I hope this is the right place to ask my questions.

-My brother in Law has a SB 5.1 in his PC and he can play directly ac3 files with it. Now I was wondering.... my standalone DVDplayer can play almost anything, except.... standalone AC3 files and mini-dvd's. Ac3-files must be converted to 44.100/16 bit wavs (stereo, Pro Logic, DD 5.1 or DTS). Now in WinonCD there is an option to burn mp3's in a video cd.
Is there a way to do the same with ac3 ?? I tried a mini DVD, but my DVD player just doesn't like the format.

-What is the reason there still is no software to decode DTS ?? If I understand it right, it is a digital stream going through a hardware decoder. Why is it impossible to do that with software ? There are software DVD players that can handle DTS... so it must be possible, I guess.

-Last but not least.... I always used to decode DD 5.1 to DTS by hand and used SF to downsample to 44.1. You can choose in SF 4 different quality-levels for the downsampling. My question : How does the downsampling in Besure compare to the one in SF ?
I really like Besure/besweet but sometimes it is still necessary to do it by hand. (remove speech and silent parts...).

regards,

Eye of Horus

The Alan Parsons Pages (http://www.thealanparsonspages.com)

[aleksander]

I'm a little bit outdated (if you can say that about a person), but I guess that DSPGuru (and I must say that he really is a GURU for most of us ;) ) will answer this question, hence I'll move this thread to the Audio forum.

take care

[Eye of Horus]

Ok, I hope answers will flooding in then :-)

Eye of Horus

[DSPguru]

Originally posted by Eye of Horus
-My brother in Law has a SB 5.1 in his PC and he can play directly ac3 files with it. Now I was wondering.... my standalone DVDplayer can play almost anything, except.... standalone AC3 files and mini-dvd's. Ac3-files must be converted to 44.100/16 bit wavs (stereo, Pro Logic, DD 5.1 or DTS). Now in WinonCD there is an option to burn mp3's in a video cd.
Is there a way to do the same with ac3 ?? I tried a mini DVD, but my DVD player just doesn't like the format. you can use BeSure's AC3-CD mode to transcode an AC3 stream to Dolby-Digital WAVs that can be burned on a plain-cd, and can be played with any cd/dvd player. but requires digital connection from your cd player to the reciever.

-What is the reason there still is no software to decode DTS ?? If I understand it right, it is a digital stream going through a hardware decoder. Why is it impossible to do that with software ? There are software DVD players that can handle DTS... so it must be possible, I guess.in order to decode a compressed audio streams, we need to read the specs, but we don't have it.
in case of AC3, since this stream is used in digital television, the spec was public, so a few programmers wrote decoders that based on atsc52.

-Last but not least.... I always used to decode DD 5.1 to DTS by hand and used SF to downsample to 44.1. You can choose in SF 4 different quality-levels for the downsampling. My question : How does the downsampling in Besure compare to the one in SF ?
I really like Besure/besweet but sometimes it is still necessary to do it by hand. (remove speech and silent parts...).BeSweet's downsampling is based on SSRC routines, which is the best downsampler ever written.

Dg.

[Eye of Horus]

Originally posted by DSPguru
you can use BeSure's AC3-CD mode to transcode an AC3 stream to Dolby-Digital WAVs that can be burned on a plain-cd, and can be played with any cd/dvd player. but requires digital connection from your cd player to the reciever. [/B]

That doesn't quite answer my question. Perhaps my bad English ?
I said I have a standalone DVD player and I said I always need to conert to wavs.
My question is (or should be !): Is there any way to use these ac3 files directly on a cd (so without converting) and play them on my standalone DVD player ??

Hope my question makes more sense now :-)

[Eye of Horus]

I know I can burn the ac3 files to CD as wavs.
In Win98 they give, after the converting, a filelength a few bytes longer than the original AC3. When burning, they return on CD to full length.
Don't know if this should be considered a bug or something in my system, but this way it is difficult to predict how much you can put on the CD !!

regards,

Eye of Horus

[DSPguru]

Originally posted by Eye of Horus
Is there any way to use these ac3 files directly on a cd (so without converting) and play them on my standalone DVD player ??STANDARD dvds can handle UDF or CDDA file structure, they can't just read a "regular data-cd", they "dont know" how to browse the files, etc'...

the idea of burning ac3 as dd-wav, is to create a cdda which is compliant with the specs.

in that case, 74mins = 74mins.