upconverting dvd problem with 5.1 audio channel

[iiggoorr]

Your like the guy, kept messing with his car.
It was a Dodge, a lost cause and a waste of time, basically.
Even if you do solve the "problem" what are you left with?
Some stuff is made "broken", the only tool that will "fix" it is the nearest dumpster.

And the point is....

neither my TV or DVD are for dumpster.
No I do not have modern AV recieve with dd or DTS decoder.
Yes I want to make the most of what I have...
So please be constructive or be quiet...

[Sir Terrence the Terrible]

iiggoorr,
Let me take a crack at this. First, your DVD player is probably sending out a Dolby Digital stream, but the television does not decode the 5.1 mix, it mixes it down to 2.0. This is correct in that your television does not have 6 speakers to decode the multichannel stream, so the internal decoder folds the surrounds and center into thye 2.0 stream. The .1 channel is discarded completely in this case.

SRS truesurround does not output as a 5.1 signal. It takes the downmixed 2.0 digital stream and through phase manipulation and timing algorythms it attempts to recreated the 5.1 channel experience, add clarity to the dialog using a EQ boost in the voice freqencies, and optimize the bass to compensate for the loss of the LFE channel to downmixing using dynamically adjustable bass boost that works to keep bass full sounding even when the volume is lowered. It is a simulated effect that when you move off axis of center, it disappears.

Just set your DVD player to 5.1 or 2.0. It will go through the set, be downmixed(if 5.1), and you can engage the Tru-surround XT to turn the 2.0 signal into faux 5.1.

I hope that helps ya.

P.S. Sorry you had to deal with the village idiot, but we all have this cross to bare.

[iiggoorr]

iiggoorr,
Let me take a crack at this. First, your DVD player is probably sending out a Dolby Digital stream, but the television does not decode the 5.1 mix, it mixes it down to 2.0. This is correct in that your television does not have 6 speakers to decode the multichannel stream, so the internal decoder folds the surrounds and center into thye 2.0 stream. The .1 channel is discarded completely in this case.

SRS truesurround does not output as a 5.1 signal. It takes the downmixed 2.0 digital stream and through phase manipulation and timing algorythms it attempts to recreated the 5.1 channel experience, add clarity to the dialog using a EQ boost in the voice freqencies, and optimize the bass to compensate for the loss of the LFE channel to downmixing using dynamically adjustable bass boost that works to keep bass full sounding even when the volume is lowered. It is a simulated effect that when you move off axis of center, it disappears.

Just set your DVD player to 5.1 or 2.0. It will go through the set, be downmixed(if 5.1), and you can engage the Tru-surround XT to turn the 2.0 signal into faux 5.1.

I hope that helps ya.

P.S. Sorry you had to deal with the village idiot, but we all have this cross to bare.

Thank you very much for explanation...

I am more and more convinced that your explanation is correct.
I am still a bit confused about SRS true surround because on the SRS web page the explanation of the system is that it takes 5 audio channel and reproduce it over 2 channels thus creating virtual surround... So as i understood it SRS true surround is black box with 5 channel input and 2 channel output...

But here is the question... I am using DVD to select audio chanel/source... and DVDs audio is selected to bit stream mode. So why is DVD down converting multichannel audio to 2.1 mode. Wouldn't it be correct to reproduce multichannel audio and to let the connected device to deal with it. .
I mean this why SRS "black box" can't use 5 channel input and do its job...

[Sir Terrence the Terrible]

Thank you very much for explanation...

I am more and more convinced that your explanation is correct.
I am still a bit confused about SRS true surround because on the SRS web page the explanation of the system is that it takes 5 audio channel and reproduce it over 2 channels thus creating virtual surround... So as i understood it SRS true surround is black box with 5 channel input and 2 channel output...

You got it!

But here is the question... I am using DVD to select audio chanel/source... and DVDs audio is selected to bit stream mode. So why is DVD down converting multichannel audio to 2.1 mode. Wouldn't it be correct to reproduce multichannel audio and to let the connected device to deal with it. .
I mean this why SRS "black box" can't use 5 channel input and do its job...

Are you sure it is downcoverting? Is it telling you it is outputting a 2.1 stream? If so, there is something missing here.

If you are sending the audio via HDMI to the television, you cannot know that it is downconverting unless you make that choice, or you are missing a output setting. If you tell the DVD player to send a 5.1 signal to the television, it should do exactly that. There should be no down conversion taking place.

[Mr Peabody]

IIggoor, what is the model number of your LG player?

[pixelthis]

And the point is....

neither my TV or DVD are for dumpster.
No I do not have modern AV recieve with dd or DTS decoder.
Yes I want to make the most of what I have...
So please be constructive or be quiet...

The point is don't worry about it.
Even if you do get it to work, what have you got?
What have you learned?
You can get a cheap HTIB that will probably sound better.
In other words, you are like the guy on this site that is rebuilding a pair of
Bose 901's, the question being why?
I think you've been messing with this so long, you have to step back and ask that
simple question...why?
Is it worth the trouble?
After getting caught up in a few dead end projects like this one, I now stop and ask
myself that question every once in awhile.

[iiggoorr]

You got it!
If you are sending the audio via HDMI to the television, you cannot know that it is downconverting unless you make that choice, or you are missing a output setting. If you tell the DVD player to send a 5.1 signal to the television, it should do exactly that. There should be no down conversion taking place.

Well here is the situation... I can not even chose the 5.1 audio channel... I can only chose from 2.1 and 2.0 audio options, and that choosing is done on DVD. Just for the information I am certain that DVDs I tried do have 5.1 audio.

I have made a little test... I copied one DVD, and I have chosen to copy only DD 5.1 audio.
When i insert that copied DVD in to the player, the only available audio is again DD 2.1.

So I guessed that DVD is automatically down converting it...

[iiggoorr]

IIggoor, what is the model number of your LG player?

I have LG DVX492H and it is connected to LG 32SL8000 TV SET via HDMI 1.3 compatible cable...

[Sir Terrence the Terrible]

I have LG DVX492H and it is connected to LG 32SL8000 TV SET via HDMI 1.3 compatible cable...

Okay now this make sense to me. The HDMI protocol see's only the televisions speaker set it is transmitting audio to, that is why it downmixes before coming out of the player. If the HDMI signal communicates with a receiver, then it will give YOU the choice of 5.1 or 2.0.

HDMI is a two way protocol that send out signals to identify the device it is communicating with. So when you set up your Bluray player, it send out a signal to ask whether the device is a 720p, 1080i. or 1080p source, and when the source communicates back what it is, the HDMI protocol will automatically set the resolution. This happen with video as well as audio, and since your television can only do stereo, that is what the protocol see's, and that is what it scales the audio to.

There is nothing wrong with your set up. You should still be able to engage the SRS signal even with two channels, and it will simulate(or should) Dolby surround(Lt/Rt), not 5.1 channel surround. The effect in the end will be pretty much the same.

[iiggoorr]

Sir Terrence the Terrible...

Thank you very much for excelent explanation, I understand it complitly now and I can stop worrying that something is wrong with either my TV or DVD...

Thanks...

[pixelthis]

Sir Terrence the Terrible...

Thank you very much for excelent explanation, I understand it complitly now and I can stop worrying that something is wrong with either my TV or DVD...

Thanks...

WHAT I SAID on 2-10, 2010.
Probably where sir talky got it from.