DVI to TV help

[Danzig]

OK.... got a lovely shiny new graphic card with DVI output. Have run the cable to my TV into the DVI socket. Ran the wizard on the the computer and can now display my PC screen on my TV.

My problem is, that i thought, sound would be run with the picture, but no it seems. Have i done something wrong or do i need to run the sound leads as well?

Any help is greatfully appreciated. Thanks

[J_C_COOL]

Originally Posted by Danzig

OK.... got a lovely shiny new graphic card with DVI output. Have run the cable to my TV into the DVI socket. Ran the wizard on the the computer and can now display my PC screen on my TV.

My problem is, that i thought, sound would be run with the picture, but no it seems. Have i done something wrong or do i need to run the sound leads as well?

Any help is greatfully appreciated. Thanks

sorry mate DVI doesn't carry sound, you'll have to run some audio cable from your sound card too.

[Danzig]

Bugger... thanks for quick reply though.

[gubar]

I was considering getting a DVI to HDMI cable - would this put me in the same position then? What kind of cable would I need to buy to get the sound to my PC?

The reason being, I would like to be able to stream HD DVDs and Blueray from my PC to my LCD tv - I think that I need a DVI cable to do that because of protection issues, is that correct?

Thanks,

g

[Bruciebaby]

Originally Posted by gubar

I was considering getting a DVI to HDMI cable - would this put me in the same position then? What kind of cable would I need to buy to get the sound to my PC?

The reason being, I would like to be able to stream HD DVDs and Blueray from my PC to my LCD tv - I think that I need a DVI cable to do that because of protection issues, is that correct?

Thanks,

g

HDMI has the sound bundled with the video. You could get a dvi-hdmi connector but you mention protection issues. I just started a new thread asking about this very topic. I think that even the dvi will (eventually) have to be compliant with hdcp if you want to play HD/Blueray discs.(At full resolution, 1080p for example)

[gubar]

Hi Bruce,

I thought DVI already was compliant with HD protection - that's why I was going to get that type of cable. I'm wondering now if VGA to VGA would be as good a choice?

Since the 360 (if you've got the add on drive) can play HD-DVD, I guess that means that it is compliant with the protection?

I basically just want to know how to get HD DVD / Blueray footage from my PC to my TV.


cheers,

g

[oldnewbie]

Its the graphics card that needs to be hdcp compliant, then you need an hdcp compliant cable like dvi to hdmi ( but vga may work ) and you need to carry the sound separately because a pc doesn't send sound to either vga or dvi, its all a bit hit and miss I'm afraid. I'm sure that all hd films at the minute don't carry hdcp encryption, but if I'm wrong someone will put me right

[NicolasB]

There is no such thing as an HDCP-compliant cable. DVI inputs and outputs may or may not be HDCP-compliant (and usually aren't). HDMI inputs and outputs (for practical purposes) always support HDCP.

Neither DVI nor VGA can carry audio. HDMI can, in principle, carry digital audio, but the only way to get digital audio via HDMI out of a PC is to use an ATI HD2900XT graphics card; nothing else is currently capable of it. The lower-end ATI cards that are just about to launch (e.g. 2600XT) will also have this ability, and are much better at decoding video than the 2900XT cards are (but crap for playing games).

Using a DVI to HDMI converter with any other card will not help you with audio.

Unfortunately even these ATI cards are not compliant with HDMI version 1.3, only v1.2, which means they will not be able to transmit "next generation" lossless audio formats over HDMI, only current-generation formats like DD or DTS.

You should also be able to persuade your PC's sound card to process DD or DTS. Either it can decode them and produce analogue output (which could be fed to the TV or, via an amp, to speakers), or it could output the original digital signal via S/PDIF, which you could then feed to an external surround sound processor.

It is likely that the lossless next-gen audio formats will eventually be decodable by the sound-card, but this will not allow digital output, of course, only analogue. That may not sound very good, depending on what sound card you have.

Present-day BluRay or HD-DVD discs can be played back over an analogue video connection such as VGA, but the facility exists for the disc publishers to disable this ability in future releases. A disc that is flagged in that way will only play back at 1/4 of the normal resolution over VGA; to get the full resolution you would need to use an HDCP-enabled video card talking to an HDCP-enabled television or monitor.

[oldnewbie]

Originally Posted by NicolasB

There is no such thing as an HDCP-compliant cable. DVI inputs and outputs may or may not be HDCP-compliant (and usually aren't). HDMI inputs and outputs (for practical purposes) always support HDCP.

Neither DVI nor VGA can carry audio. HDMI can, in principle, carry digital audio, but the only way to get digital audio via HDMI out of a PC is to use an ATI HD2900XT graphics card; nothing else is currently capable of it. The lower-end ATI cards that are just about to launch (e.g. 2600XT) will also have this ability, and are much better at decoding video than the 2900XT cards are (but crap for playing games).

Using a DVI to HDMI converter with any other card will not help you with audio.

Unfortunately even these ATI cards are not compliant with HDMI version 1.3, only v1.2, which means they will not be able to transmit "next generation" lossless audio formats over HDMI, only current-generation formats like DD or DTS.

You should also be able to persuade your PC's sound card to process DD or DTS. Either it can decode them and produce analogue output (which could be fed to the TV or, via an amp, to speakers), or it could output the original digital signal via S/PDIF, which you could then feed to an external surround sound processor.

It is likely that the lossless next-gen audio formats will eventually be decodable by the sound-card, but this will not allow digital output, of course, only analogue. That may not sound very good, depending on what sound card you have.

Present-day BluRay or HD-DVD discs can be played back over an analogue video connection such as VGA, but the facility exists for the disc publishers to disable this ability in future releases. A disc that is flagged in that way will only play back at 1/4 of the normal resolution over VGA; to get the full resolution you would need to use an HDCP-enabled video card talking to an HDCP-enabled television or monitor.

You said exactly the same as me but in a really long explanation lol ps if there is not such a thing as an hdcp compliant cable (compliant actually means conforming to requirements) how do you suppose you carry the signal from hdmi (hdcp) out to hdmi (hdcp) in, a piece of string. Instead of picking holes in someone else's answer (who by the way was only trying to help) and trying to look all superior, maybe it would be more helpful and dare i say polite to just answer the original question.

[nwgarratt]

DVI on new equipment is very likely to be HDCP now. Even my projector which isn't HD Ready has a HDCP DVI socket.

[NicolasB]

Originally Posted by oldnewbie

if there is not such a thing as an hdcp compliant cable (compliant actually means conforming to requirements) how do you suppose you carry the signal from hdmi (hdcp) out to hdmi (hdcp) in, a piece of string.

The point is that, while there are such things as DVI cables and HDMI cables, the cable has no influence on HDCP-compliance. The cable simply transmits a digital signal down it. That signal may be encrypted with HDCP or it may not be, but the cable doesn't care either way.

Talking about "hdcp-compliant cables" implies that it is possible for a DVI or HDMI cable not to be compliant with HDCP, which is nonsense.

[oldnewbie]

Originally Posted by NicolasB

The point is that, while there are such things as DVI cables and HDMI cables, the cable has no influence on HDCP-compliance. The cable simply transmits a digital signal down it. That signal may be encrypted with HDCP or it may not be, but the cable doesn't care either way.

Talking about "hdcp-compliant cables" implies that it is possible for a DVI or HDMI cable not to be compliant with HDCP, which is nonsense.

Nonsense or not encryption will require that both the output and input of hdcp enabled devices will have to be either hdmi or dvi ( although older dvi equipped devices will not meet hdcp encryption standards ) and therefor the cable used is an integral part of the hdcp equation so arguing semantics on how a cable is named is a waste of both our time.

[NicolasB]

If I can save someone from looking like an idiot by asking a salesman if the DVI cable they're buying is HDCP-compliant, I regard that as a job well done.

[oldnewbie]

Originally Posted by NicolasB

If I can save someone from looking like an idiot by asking a salesman if the DVI cable they're buying is HDCP-compliant, I regard that as a job well done.

Your missing the hole point, By there very nature all DVI and HDMI cables are HDCP compliant because no other type of cable will carry a HDCP encrypted signal, And if I can stop someone looking a complete fool by arguing semantics over such a blatantly obvious and very minor fact then I think it is my duty to do so lol.

[Liam @ Prog AV]

I would like a Dolby Digital compliant optical lead please.