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96/24 and DVD

811 Views 9 Replies 6 Participants Last post by sspears, Jan 25, 2000

Bernd

Discussion Starter · Jan 20, 2000

I am really confused. I read about the ability of high end DVD players to decode 96/24 audio. Does this mean that the player is doing digital to audio conversion or does it mean that it is passing a digital stream to the reciever? I am particularly interested in figuring out the HTPC implications of this question, since I want to design a HTPC that sounds as good as the high end DVD players (I already know that the HTPC is going to look better).

Thanks,

Bernd

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migliore

· #2 · Jan 20, 2000

From what I know, you cant pass 96kHz signals across SPDIF, it isn't allowed in the interface. Maybe in the AC-3 interface you can (although AC-3 is nominally 20b/48k compressed). So, I think the only way to listen to 24/96 is to take the analog outs of your DVD player.......

Rob

------------------
display: toshiba 40" widescreen hdtv,
speakers: acoustic energy 500 series, paradigm ps-1200 sub,
pre-amp: ead encore,
amp: b&k av654,
front-end: rega planet, sony 7700,
cables: synergistic research, kimberkable, audioquest, monstercable,
misc: rotel line conditioner, synergy racks

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jackson

· #3 · Jan 21, 2000

Check out the MSB web page. Just purchased their Link DAC III. You won't believe what you've been missing. Less than $400. Who needs DVD-A.

Jack

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Bernd

Discussion Starter · #4 · Jan 21, 2000

I'll have to say that I am not getting any less confused. The high end recievers all sport Burr-Brown DAC's for 96/24 audio processing. The high end DVD players talk about this as well. There is a great deal of focus on the Toslink optical cables as the best way to move the signal to the reciever. So, my bottom line question is.... Does a 96/24 digital signal go from the DVD player over the optical cable to the reciever or not?

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Bernd

Discussion Starter · #5 · Jan 21, 2000

Just looked at the MSB web site ( http://www.msbtech.com/home.html ). Sounds like they cut through the BS that is going on here. Now, one more question.... If I go with a HTPC, how does all of this fit together?

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sspears

· #6 · Jan 21, 2000

Many Pioneer DVD players will output a 96/24 signal through the S/PDIF. Its a seletable option in the menu system.

The Theta DVD players will do the same thing since they contain many Pioneer parts underneath.

Toshiba and Sony players do NOT output a 96/24 signal through the S/PDIF. You must use analog outputs if you want that.

A DVD can tell a dvd player not to output a 96/24 signal. All of the current 96/24 DVDs from Chesky do not do this. If they did, then your DVD player is supposed to downsample. Since no DVDs have been encoded this way there is no way to tell if Pioneer is playing by the rules.

The above has probably confused some of you so I will explain a little more. Sony and Toshiba ALWAYS downsample 96/24. Pioneer does not downsample (well you have the option to) on non-protected DVDs. If Chesky turned on that feature then a DVD player iS NOT supposed to output a 96/24 signal. Currently we do not know if the Pioneer will do what it is supposed to.

Now the Meridian 800 DVD player is allowed to encrypt a protected DVD and output a 96/24 using MHR. That means they can pass a 96/24 signal all the way to their speakers. If you have MHR turned off then it will only downsample if the DVD is marked as protected.

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sspears

· #7 · Jan 24, 2000

Phunt,

The light on your DVD player is telling you that you have a 96/24 disc and it is outputing that on the analog jacks only. You digitial output is 48 kHz.

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Steve Bruzonsky

· #8 · Jan 25, 2000

My Theta Voyager DVD/CD outputs a 96/24 digital signal, or a downsampled 48/20 digital signal, per menu selection. When my Casablanca finally gets upgraded with new Casablanca 2 features in a few months, including 96/24 DACs, I'll be able to play 96/24 stereo digital direct! (I've been waiting an awful darned too long for this, haven't I?)

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philhu

· #9 · Jan 25, 2000

ok, so the 96k is output only on analog.

How would my Sony accept 96k on the analog port?

Do you mean the standard RCA Audio out jacks?

Phil

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sspears

· #10 · Jan 25, 2000

When you say Sony, do you mean your receiver/processor?

If so, then yes, on its analog inputs. Now a problem that would limit the quality is if the analog inputs are ran through an A/D converter that has lower resolution than the source. Not sure if any A/Ds today support 96 kHz. They do handle 24-bit and are usually 48 kHz.

here is an interesting tidbit for everyone. S/PDIF can handle 96 kHz but not 192 kHz. What has been, and is being, considrered is using two S/PDIFs to handle 192 kHz. This is using the current connectors. Lets hope that everyone will agree on a new interface.

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