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Dolby True HD / DTS HD with receivers / players
#155121 01/05/07 07:43 PM
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OK, I've tried figuring this out online, but I seem to be missing something.

Will A/V receivers eventually be able to receive, digitally (HDMI or Optical, I guess?), Dolby True HD or DTS HD from an HD-DVD or Bluray disc? Or will I have to use the analog inputs?

To my understanding, these are both full 7.1. Will players be able to decode this at full rates and send, analog, the signal through 8 cables to a receiver?

I just want to make sure I am future proof in my next receiver purchase.

Thanks guys.

Re: Dolby True HD / DTS HD with receivers / player
ravi_singh #155122 01/05/07 07:46 PM
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There is no future proof. Especially not these days.

Anyone remember when DVI was future proof?


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Re: Dolby True HD / DTS HD with receivers / player
Ken.C #155123 01/05/07 08:11 PM
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I dont know the answer, but i vaguely remember seeing something about hdmi 1.3 that may have talked about multichannel audio over a single cable


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Re: Dolby True HD / DTS HD with receivers / player
Jim_Perkins #155124 01/05/07 09:44 PM
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If you have a player that is capable of decoding these audio formats (not many do currently, only the Panasonic blu-ray, and I think the Toshiba HD-DVD players), then you can use the analog outputs- but then there is the separate issue of bass managment as most receivers don't perform bass management on the analog inputs. Some do. Analog may limit you to 5.1 only (although the Panisonic Blu-ray player has 7.1 analog outs, others may follow but as HDMI v1.3 takes over, you'll probably see the analog outputs on less players).

You can also send the fully decoded multichannel LPCM stream from the player over HDMI to your receiver- but many receivers that support HDMI v1.1, don't handle this correctly.

If your player won't decode these audio formats (I have a Sony BDP-S1 that doesn't), it will just extract the DTS or Dolby Core audio stream at 1.5Mbps, but not the Dolby or DTS extension stream. This is also all it can output over the coax or optical paths (not enough bandwidth for anything more). The advantage however is you get bass management with your receiver, and 6.1 or 7.1 if the source supports it.

A third option is to send the raw bitstream direct from the player to the receiver. This requires HDMI v1.3 on both the player and receiver (2007 models should start to support this). This way, your player doesn't have to be capable of decoding the stream, but your receiver will need to have the decoders for these HD audio formats. Hopefully the new receivers that have HDMI v1.3 will also have the Dolby and DTS decoders.

This topic is confusing, as the technologies are still being refined.

*** EDIT *** One thing to clarify is that you will not be able to get the full bandwitdh of the Dolby TrueHD or DTS HD Master Audio streams over Optical or Coax, only HDMI or analog (if decoded by the player). If this is selected now, what you are actually getting is the lower bitrate core stream.

Last edited by dllewel; 01/05/07 10:04 PM.

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Re: Dolby True HD / DTS HD with receivers / player
ravi_singh #155125 01/05/07 10:02 PM
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>>I just want to make sure I am future proof in my next receiver purchase.>>

If you are serious about this statement and don't wish to buy another reciever for a long time (5 years?) then I would suggest waiting another 6 months until the new models roll out that feature HDMI 1.3 which may (or may not) be the standard of HDMI for more than a year

Regardless, if you are looking to future proof, wait for HDMI 1.3 compatible receivers.


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Re: Dolby True HD / DTS HD with receivers / player
Hutzal #155126 01/09/07 04:36 AM
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It looks like I won't be waiting for the "next best thing"!

I have resigned myself to waiting for this ridiculous format war to end, if it ever does. In the meantime, I will buy something with 7.1 analog inputs and hope for the best. I miss using my surround sound (I sold my little Denon to my Dad).

Thanks for all the replies.

Re: Dolby True HD / DTS HD with receivers / player
ravi_singh #155127 01/09/07 04:45 AM
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If you have a receiver that accepts LPCM over HDMI and the player decodes and will send the discrete 7.1 over HDMI then you are ok. CES will more than likely unvail new receivers with the builtin codecs and HDMI 1.3. However, as long as the recever you have now will accept LPCM then you are really ok.

If you aren't in current need, however, we should definitely see some receivers with HDMI 1.3 unveiled at CES this year.


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Re: Dolby True HD / DTS HD with receivers / player
nicholc2 #155128 01/09/07 04:50 PM
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I’ve done more research on HDMI and HDMI receivers/pre amp / processors in the last two weeks than I can stand.

I know about as much about it now as I did two weeks ago. This is nothing but a moving target and when you think you understand it, it moves.

What I have learned however, and this can not be disputed, is 1.3 is not the HDMI holy grail. Anyone who thinks if they wait for 1.3 they are ‘future proof’, or even ‘safe’, is sadly mistaken and will be in for a disappointment. 1.3 comes with its own issues and bugs just like all other versions have. Don’t kid yourself thinking if you wait for 1.3 that you will not have problems. You will most likely be bitching louder than the rest of us with 1.1 HDMI equipment.

The ‘safest’ thing to do is buy HDMI equipment that works from manufactures that actually put an effort into ensuring that it does work before rolling it out the door. Some manufactures just roll their crap out with little testing and quality control and it won’t make a bit of difference if they roll it out with 1.1, 1.2, or the latest 1.3. If it has 1.3 but won’t get along with all the other HDMI equipped stuff on your rack, what good is it?? Also, don’t believe a thing you read in the manuals because they are quite illusive in describing what the unit will do. It’s best to find someone who has the same model you are thinking about buying and asking them to verify what it will do. But then you will be at the mercy of that individual’s understanding of how to configure the unit correctly. Oh yeah, good luck with getting a straight anser from tech support too. Chances are that you will be teaching them.

Re: Dolby True HD / DTS HD with receivers / player
michael_d #155129 01/09/07 05:51 PM
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Sad, but true.

v1.3 is being waited for because you will be able to send the DTS-HD (High Resolution and/or Master Audio) and Dolby TrueHD raw bitstream over it, where you can't with v1.2. Of course, to take advantage of this the new receiver will also need to be able to decode these formats. At least this go around, the logo will either be on the front of the receiver, or it won't... giving some sign of assurance.

Although the naming of the new formats will probably add to confusion here, because a consumer may not realize a receiver doesn't support these new codecs if it just says DD / DTS on it. As Mike said, talking to someone who has tried it will be the best assurance. Isn't it great we have our forums?


-Dave

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Re: Dolby True HD / DTS HD with receivers / player
dllewel #155130 01/10/07 02:13 AM
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Gotta chime in here.
Was reading a CNET review of CES 2007 and they said that they failed to see any receivers showing off hdmi 1.3. What gives? If these receivers arent at CES now then when will they hit the market....holiday 2007 or Winter 2008????


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