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Author Topic: 24/96 on dvd-v discs  (Read 6629 times)

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Offline mizary

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24/96 on dvd-v discs
« on: May 24, 2007, 02:04:42 PM »
I always though you could only put 16/48 on a video dvd...  Also is there any difference between an audio dvd and a video dvd?  I'm not talking about DVD-A...  but when people put just audio on a dvd that will play in any dvd player.

I'd also seen people say the audio DVD will only hold 2hrs of 24/96 PCM...  so it doesn't sound like the authoring app is resampling.

Here is the real question....  If all of the above is true...  What does a regular dvd player do with the 24/96?  Does it downsample/dither it?  Or does it really output 24/96.  Does it vary by player?

I'm all confused. I'd always thought the only way to put 24/96 on a disc was to burn a DVD-A disc, which will only play in a DVD-A player.

--mizary
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Offline nickgregory

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Re: 24/96 on dvd-v discs
« Reply #1 on: May 24, 2007, 02:24:40 PM »
I use Audio DVD creator and make 24/96 DVD-V discs and it works fine.  Player outputs 24/96 and unlike DVD-A, I have not had any compatibility issues with decks...

Offline Colin Liston

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Re: 24/96 on dvd-v discs
« Reply #2 on: May 24, 2007, 02:33:21 PM »
Neil Young's two new DVDs have 24/96 audio. 
Occasionally....music mics record

Offline bkirby

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Re: 24/96 on dvd-v discs
« Reply #3 on: May 24, 2007, 02:36:42 PM »
Now some DVD-V players may only output 48kHz. It may vary depending on the player. Some players may still read a 24/96 source DVD-V (or DVD-A), but may resample the output to something else. YMMV...
Hope this helps...

Offline mizary

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Re: 24/96 on dvd-v discs
« Reply #4 on: May 24, 2007, 03:27:06 PM »
How can you figure out what the player is outputting?

Isn't there RIAA restrictions on sending 24/96 over coax/optical?  Do you still have to use analog outs like on a DVD-A player to get 24/96?  Or does that not matter if the content isn't copy protected.

--mizary
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Offline bkirby

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Re: 24/96 on dvd-v discs
« Reply #5 on: May 24, 2007, 04:24:52 PM »
Best thing to do is either read the specs. of your player or contact the manufacturer. If you have one though, you can hook up a 24bit recorder to the digi output and figure out what signal it is outputting. As for the analog outputs, only the specs. and/or the manufacturer would be able to answer that question. Sorry I can't be more specific. Please provide us with the model you are referring to and some of the internet gurus might be able to shed some light on the questions...

Offline Lil Kim Jong-Il

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Re: 24/96 on dvd-v discs
« Reply #6 on: May 24, 2007, 09:15:04 PM »
Isn't there RIAA restrictions on sending 24/96 over coax/optical?

No.
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Offline udovdh

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Re: 24/96 on dvd-v discs
« Reply #7 on: May 28, 2007, 04:40:08 AM »
Now does anybody know about a Linux application that can make DVD-V's with a simple 'dull' video background and my PCM audio?
What could or should I use?

Offline udovdh

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Re: 24/96 on dvd-v discs
« Reply #8 on: June 01, 2007, 01:17:59 PM »
FWIW: I managed to build a few DVD-video's with PCM audio from the command line, e.g.:

# sox /test3.wav -t raw -x -s -w -c2 -r48000 out.lpcm       

# jpeg2yuv -v 0 -f 25 -I p -n 102000  -j "image.jpg"| mpeg2enc -v 1 -q 31 -f 8 -b 1000 -o image.mpg

# mplex -f 8 -S 0 -L 48000:2:16 -o out.mpg image.mpg out.lpcm

# dvdauthor -t -a pcm+16bps+2ch+48khz -c 0,00:10:00,00:20:00,00:30:00,00:40:00,00:50:00,01:00:00,01:05:00 out.mpg -o DVD

# dvdauthor -T -o DVD

# mkisofs -dvd-video -udf DVD > videodvd.iso

# growisofs -speed=4 -Z /dev/dvd=videodvd.iso


(yes I am in PAL land, the example is about audio that is a little over 1 hour)

Offline udovdh

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Re: 24/96 on dvd-v discs
« Reply #9 on: June 05, 2007, 12:19:41 PM »
Aaaargh!

Both my NAD T524 and the Cyberhome show a buffering problem (again), but this time with the DVD-videos I just created.
When nearing the end of the 1GB VOB there is a slight pause near 01:18:18 or so.
Both on the Cyberhome and the (much more expensive) NAD T524.
(this is with 16/48, what would it be with 24 bits or even 96 Khz?)

Beware!

Offline noam

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Re: 24/96 on dvd-v discs
« Reply #10 on: June 05, 2007, 01:23:03 PM »
If you have one though, you can hook up a 24bit recorder to the digi output and figure out what signal it is outputting.

How would you do that? You mean a 24-bit recorder like the SONY PCM D1 or the R-09? The recorders would record in whatever bit depth you choose. Say the player outputs only 16 bits - if you hook up a 24 bit recorder to its digi output and tape it in 24 bit, the software will show a 24 bit recording.

Or do you mean some kind of 24-bit meter?

Noam

Offline udovdh

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Re: 24/96 on dvd-v discs
« Reply #11 on: June 05, 2007, 02:23:34 PM »
If you have one though, you can hook up a 24bit recorder to the digi output and figure out what signal it is outputting.

How would you do that? You mean a 24-bit recorder like the SONY PCM D1 or the R-09? The recorders would record in whatever bit depth you choose. Say the player outputs only 16 bits - if you hook up a 24 bit recorder to its digi output and tape it in 24 bit, the software will show a 24 bit recording.
In that case you can look at the samples. a zeroed byte every two bytes indicates that the lowest byte is unused. (a sample consists of 3 bytes per channel, so the upper 16 bits and the lower 8. recording 16-bit at 24-bit will yield zeroes in the lower 8 bits)

Offline noam

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Re: 24/96 on dvd-v discs
« Reply #12 on: June 06, 2007, 10:55:51 AM »
If you have one though, you can hook up a 24bit recorder to the digi output and figure out what signal it is outputting.

How would you do that? You mean a 24-bit recorder like the SONY PCM D1 or the R-09? The recorders would record in whatever bit depth you choose. Say the player outputs only 16 bits - if you hook up a 24 bit recorder to its digi output and tape it in 24 bit, the software will show a 24 bit recording.
In that case you can look at the samples. a zeroed byte every two bytes indicates that the lowest byte is unused. (a sample consists of 3 bytes per channel, so the upper 16 bits and the lower 8. recording 16-bit at 24-bit will yield zeroes in the lower 8 bits)

I don't know how to do that. Can you please elaborate very specifically? I use SF8 - where in SF8 do I look at the samples?

thanks, Noam

Offline udovdh

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Re: 24/96 on dvd-v discs
« Reply #13 on: June 06, 2007, 01:26:31 PM »
Dunno. I meant to just look at a hexdump of the file.
Maybe others can test with 16-bit audio in a '24-bit' file and have a look?
Maybe statistics can tell something?

Offline udovdh

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Re: 24/96 on dvd-v discs
« Reply #14 on: June 16, 2007, 12:29:30 PM »
BTW: yesterday, friday, I had another telephone call with NAD electronics (Canada? USA?).
They say I am the only person having issues with their T524 DVD-A player (non-gapless DVD-A playback and now also the skips near VOB end when playing DVD with low-bitrate video and stereo PCM audio).  ???

If you have a NAD DVD-player and have noticed the non-gapless DVD-A playback or other issues, please use the support form on their website or give them a call so they get their statistics corrected a little. The phone number is on their site.

 

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