HD-DVD Audio? A must read!

[Sycho]

I had this idea, with the new HD-DVD finlized I think its time the audiophiles said something about.

I have heard all this talk about 10.2 channels and more channels, things like this (http://groups.google.ca/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&th=a66b7f20953df79d&seekm=19971101193100.OAA04038%40ladder02.news.aol.com&frame=off), but, I think that the HD-DVD sould have a B-Format 4-Channel on it.

So I can up with this:

For proper phase in the high end you need a sampling rate 3x the desired bandwidth, so a minimum sampling rate of 64kHz filter at about 21.3kHz, still to low, so lets say 96kHz sampling rate filtered at 32kHz.

Now quananize it a 24bit you got for 64kHz 6.144 Mbps and for 96kHz 9.216 Mbps.

Okay, HD-DVD will have a max bitrate of about 30mbps, so I don't think that 1/3 of it should goto audio. Lossless compression will bring the bitrate to just over half of those alreadly stated.

But what about ADPCM? I have been told that it cuts out some high frequencys, but if they are ready filter out it would appear transparent to the original, but take up 1/4 the size so, you can have full spherical sound reproduction at 64kHz 1.536 Mbps or 96kHz at bout 2.304 Mbps without compromising quality.

If some knows of a way to create an ADPCM 64kHz/24bit and/or 96kHz/24bit codec, or modify an existing one it would help alot or anyother ideas or improvements, please tell me.

I think we should start a petition to tell the DVD-Forum that we want Ambisonics on HD-DVD.

Let me say this: Give us Ambisonics on HD-DVD

[specise_8472]

It has already been put forward as a new DVD format.
But it is something that we will never see.

Ambisonics had its chance years ago when first discovered. But the people responsable were more interested in protecting their discoveries than letting it out and becoming popular.
There was a chance when UHJ recordings were released on albums, but it never took off.
Also manufacturers of DVD players and/or Amps would not be to happy at having to add this method to their goods. Not enouth interest out there to warrent it. But then again, more and more players are being released to can handle DVD and DVD Audio.

Now, with Dolby and DTS ruling the roost, forget about it. Unless one of them can obtain full rights and patents to it. Not gonna happen in this earth's lifetime.
About all the surround formats are Dolby and DTS, yes and even DVD audio is controlled by them. Dolby has the rights to MLP, so basically controls DVD audio.
The only light at the end of the tunnel is SACD. Which is a far better sounding format for music. And it could be added onto DVD easily enouth.

[bond]

was there already a decision made on what audio format will be used on hd-dvd? or which formats are under discussion?

[specise_8472]

You might find this interesting.

As mainstreaqm consumers around the world are rapidly moving towards recordable DVD standards, the fight for the next generation optical disc winner is already getting more heated than the good olde DVD-R vs DVD+R ever.

We already have Blu-Ray drives in Japanese markets. DVD Forum decided to use AOD in its HD-DVD specs. Then Chinese government-backed royalty evasion scheme EVD was unveiled by group of Chinese consumer electronics companies (who currently dominate most of the DVD player markets around the world, most notably American markets). Now, Taiwanese government-backed standard has been released. FVD or Finalized Versatile Disc has been developed by Taiwanese Opto-electronics & Systems Laboratories and uses Microsoft's Windows Media Video 9 (WMV9) and Windows Media Audio 9 (WMA9) formats to store the video on a disc. News sources don't mention whether the disc will use red or blue laser technology, but the fact that it uses Microsoft's codecs is a significant one as it is likely that Microsoft will start pushing the standard heavily into living rooms, at least in Asia.


So while the DVD forum sits on its hands and waits for the biggest "money under the table" deal. Microsoft is manouvering itsself to become the new standard.
The same thing happened in the VHS/Betamax wars. The Asian market was first and had more power, and so the inferior format won out. What is significant is that a lot of TV studios around the world are still using Betamax for broadcast material.

[bond]

well i doubt that these selfmade standards like EVD and FVD without broad backing of the big consumer multis will have any longtime chance

now that HD-DVD was used by the dvdforum finally (and not blu-ray) the question to come will be if they will use wmv9 or h.264 as video format (from what i read mpeg-2 will not be used)

i hope the latter...

[hendrix]

Originally posted by specise_8472
What is significant is that a lot of TV studios around the world are still using Betamax for broadcast material.

actually we use BetaCAM not Betamax...its a big difference - although the casing is the same