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How can a TV know that an image is coming from a computer, not acomsumer set-top box?
Hello!
According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On 14 Dec, 12:51, D wrote:
Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Some possible reasons below http://www.behardware.com/articles/6...nightmare.html http://www.drmblog.com/index.php?/ar...__BAD_DRM.html Doc |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 14, 7:51 am, D wrote:
Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima DVI uses discrete time binary addressing, whereas a sampling is derived from the DB15's pin-out voltages (potentially leading to crosstalk between pixel addressing). Two of three DVI versions, DVI- digital and DVI-integrated (digital and analog), are within HDMI standards. Seems like a question as to what version of HDMI (version 2.3b is the latest) Samsung employs. If within industry specifications, I'd obtain the cable you're contemplating to test the videoboard's DVI output and verify Samsung's statement that its HDMI does not meet industry compliance. I'd also first identify the DVI output of the videoboard for the cable pinout forms illustrated he http://en.wikipedia.org/wiki/Image:D...ctor_Types.svg If your output is visually a pin-match of the DVI-A illustration, then I wouldn't. |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
In alt.tv.tech.hdtv Dr Hfuhruhurr wrote:
| On 14 Dec, 12:51, D wrote: | Hello! | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | image from a computer through its HDMI input, but through its d-sub | only. Is it really true? How can the TV know that an image is coming | from a computer, not a comsumer set-top box? My video card is Gigabyte | HD 2600Pro. I would like to use a DVI-HDMI cable. | Regards, | Dima | | Some possible reasons below | | http://www.behardware.com/articles/6...nightmare.html | | http://www.drmblog.com/index.php?/ar...__BAD_DRM.html NON-encrypted video over the DVI/HDMI is supposed to be displayed OK. When DRM restricted content is being played, the player is supposed to engage HDCP with includes encrypting the digital data over the HDMI wires so you can't tap into it (otherwise that would be a massively huge hole in the whole works). In the computer, much of that work is in the video card (the HDCP part of it) and much of it is in the player software (the DRM part of it, and making sure the video card driver turns on HDCP before sending it any restricted video). For ordinary computer desktop video, that should not have HDCP engaged and thus the video over the DVI/HDMI wires should not be encrypted. Monitors and TVs should display that. Those that do not are defective. When you play a restricted video, then things change and it starts the HDCP unless you are operating the playback in a reduced mode acceptable to the video source (like 480i/576i in a small window). But it is rather well known that firmware programmers make lots of defects. I've not only seen such in products, I've even dealt with such programmers in a tech support role (though none of these were developing TV monitor or DVD player firmware). A lot of them can't program their way out of a soap bubble. Just last week I had to explain how the POSIX standard read() and write() functions work to one that had supposedly be programming embedded systems for years. So I would not be surprised at all if mistakes are made in such programming in the case of TVs that fail to handle NON-encrypted video over HDMI (which would break a lot of things, as there are also some DVD players and set top boxes that have HDMI without HDCP). For example, LCD does not flicker even at low frame rates. So if the video is literally being transmitted at 24 frames per second, which would totally suck on a CRT if it tried to display that directly without upconversion, an LCD display should have no problem with it. Yet, LCDs are made which will refuse to display if the frame rate is below 50 fps. I can understand a limit on the upper end (might exceed the speed the circuits are able to handle). But on the lower end at 50 fps? LCD should be fine down to 20 fps displaying it directly, and even lower. OTOH, this could also just be a similar defect on the part of documentation writers. -- |---------------------------------------/----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/-------------------------------------| |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
I think you can use the "input" button on your TV remote to choose HDMI
input. "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Fri, 14 Dec 2007 04:51:41 -0800, D wrote:
Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Don't know if it's true or not, but my Olevia 427V has no problem with it. Why don't you just try it and see? Cross posting removed. -- Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org My Tivo Experience http://wesnewell.no-ip.com/tivo.htm Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm AMD cpu help http://wesnewell.no-ip.com/cpu.php |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
In alt.tv.tech.hdtv D wrote:
| According to Samsung LE-32r71b HDTV manual the TV cannot receive an | image from a computer through its HDMI input, but through its d-sub | only. Is it really true? How can the TV know that an image is coming | from a computer, not a comsumer set-top box? My video card is Gigabyte | HD 2600Pro. I would like to use a DVI-HDMI cable. A colleague at work has verified that his Sharp Aquos 37" TV works fine with his video card DVI output connected to the TV HDMI input via a DVI to HDMI cable. His computer is running Linux, not Windows. So in this case, the TV is accepting NON-encrypted digital video correctly as it should. Hopefully, for non-protected content, Windows will properly NOT use HDCP. It's only for protected content that it is expected to use HDCP to ensure you cannot use a monitor that is really something like a recorder, or let you tap the HDMI cable wires (it's encrypted in HDCP). -- |---------------------------------------/----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/-------------------------------------| |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
"T Shadow" wrote in message ... "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Wouldn't rule out technical reasons but probably they just don't want to answer questions about it. Puts the onus on you. Likely because HDMI has authentication handshaking built in to its protocol and the PC may not be savvy to such things. -- Woody harrogate three at ntlworld dot com |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 14, 4:08 pm, Dr Hfuhruhurr wrote:
On 14 Dec, 12:51, D wrote: Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Some possible reasons below http://www.behardware.com/articles/6...ic-card-and-mo... http://www.drmblog.com/index.php?/ar...V_+_HDMI_+_HDC... Doc Thanks Doc for replying! I have bought Gembird DVI-HDMI cable. Samsung is WRONG: Samsung LE-32r71b does show video through HDMI input from a computer DVI output (not a blank screen as Samsung affirms), but of much lower quality than through D-sub input. There is no audio through HDMI also, although Gigabyte HD 2600Pro outputs audio through DVI output. Regards, Dima |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
In alt.tv.tech.hdtv Woody wrote:
| | "T Shadow" wrote in message | ... | "D" wrote in message | ... | Hello! | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | image from a computer through its HDMI input, but through its d-sub | only. Is it really true? How can the TV know that an image is coming | from a computer, not a comsumer set-top box? My video card is | Gigabyte | HD 2600Pro. I would like to use a DVI-HDMI cable. | Regards, | Dima | | Wouldn't rule out technical reasons but probably they just don't want | to | answer questions about it. Puts the onus on you. | | | Likely because HDMI has authentication handshaking built in to its | protocol and the PC may not be savvy to such things. HDMI and DVI are essentially the same thing, but with different connection and no standard for audio over DVI. Presumably you can even do HDCP over DVI if it doesn't need the sound are part of its authentication checks. -- |---------------------------------------/----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/-------------------------------------| |
How can a TV know that an image is coming from a computer, nota comsumer set-top box?
wrote:
use HDCP. It's only for protected content that it is expected to use HDCP to ensure you cannot use a monitor that is really something like a recorder, or let you tap the HDMI cable wires (it's encrypted in HDCP). Unless you install AnyDVD on it first, and then the whole sorry mess ceases to matter. ;-) -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
On Fri, 14 Dec 2007 04:51:41 -0800, D wrote:
Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima It probably can't tell that. But it can 'tell' if it's asked to do something outside it's range of capabilities. |
How can a TV know that an image is coming from a computer, nota comsumer set-top box?
Woody wrote:
"T Shadow" wrote in message ... "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Wouldn't rule out technical reasons but probably they just don't want to answer questions about it. Puts the onus on you. Likely because HDMI has authentication handshaking built in to its protocol and the PC may not be savvy to such things. In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. Give it a try on the HDMI input. It just work out. On the other hand if you have a 1080p screen, buy good card with a HDMI output capable of 1080p. Regards Glenn. |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
wrote in message ... In alt.tv.tech.hdtv Woody wrote: | | "T Shadow" wrote in message | ... | "D" wrote in message | ... | Hello! | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | image from a computer through its HDMI input, but through its d-sub | only. Is it really true? How can the TV know that an image is coming | from a computer, not a comsumer set-top box? My video card is | Gigabyte | HD 2600Pro. I would like to use a DVI-HDMI cable. | Regards, | Dima | | Wouldn't rule out technical reasons but probably they just don't want | to | answer questions about it. Puts the onus on you. | | | Likely because HDMI has authentication handshaking built in to its | protocol and the PC may not be savvy to such things. HDMI and DVI are essentially the same thing, but with different connection and no standard for audio over DVI. Presumably you can even do HDCP over DVI if it doesn't need the sound are part of its authentication checks. Most cable STB use DVI and they most certainly have HDCP enabled. steveo |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
On Sat, 15 Dec 2007 22:03:14 +0000, Glenn Millar
wrote: In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. Regards Glenn. The VGA 15 pin D style handles higher resolutions pretty well; I use 1600x1200 via that connection and it has no problems I detect. What I'd like, without spending money, of course, is 2400x1600 ... or maybe 3200x1200 dual monitor. But that costs money. With 6+ megapixel cameras, can the monitors be far behind? |
How can a TV know that an image is coming from a computer, nota comsumer set-top box?
In article ,
Glenn Millar wrote: In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. There's no reason you can't use the same modeline over DVI or HDMI that you would use with VGA. On the contrary, in my experience it's been much easier to get LCDs working on a digital connection than on an analog connection. LCDs sold for computer use have a button on them that usually allows them to sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 correspondence between pixels in the framebuffer and pixels on the screen, you then have to do extensive tinkering with modelines...and you might never come up with a working modeline. My TV has a native resolution of 1280x768. I generated a modeline for that resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just Works. _/_ / v \ Scott Alfter (remove the obvious to send mail) (IIGS( http://alfter.us/ Top-posting! \_^_/ rm -rf /bin/laden What's the most annoying thing on Usenet? |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 15, 2:03 pm, Glenn Millar wrote:
snip In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. Give it a try on the HDMI input. It just work out. On the other hand if you have a 1080p screen, buy good card with a HDMI output capable of 1080p. Regards Glenn. How is 1080 less than 768? GG |
How can a TV know that an image is coming from a computer, nota comsumer set-top box?
Scott Alfter wrote:
In article , Glenn Millar wrote: In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. There's no reason you can't use the same modeline over DVI or HDMI that you would use with VGA. On the contrary, in my experience it's been much easier to get LCDs working on a digital connection than on an analog connection. LCDs sold for computer use have a button on them that usually allows them to sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 correspondence between pixels in the framebuffer and pixels on the screen, you then have to do extensive tinkering with modelines...and you might never come up with a working modeline. My TV has a native resolution of 1280x768. I generated a modeline for that resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just Works. _/_ / v \ Scott Alfter (remove the obvious to send mail) (IIGS( http://alfter.us/ Top-posting! \_^_/ rm -rf /bin/laden What's the most annoying thing on Usenet? Your experience may well be correct with other LCD or Plasma TV's but my reply was in relation to the Samsung screens. They don't like being connected to a PC via HDMI. If someone get a profile for PowerStrip that works correctly with a samsung i'd like a copy. Regards Glenn. |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
In alt.tv.tech.hdtv steveo wrote:
| | wrote in message | ... | In alt.tv.tech.hdtv Woody wrote: | | | | "T Shadow" wrote in message | | ... | | "D" wrote in message | | | ... | | Hello! | | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | | image from a computer through its HDMI input, but through its d-sub | | only. Is it really true? How can the TV know that an image is coming | | from a computer, not a comsumer set-top box? My video card is | | Gigabyte | | HD 2600Pro. I would like to use a DVI-HDMI cable. | | Regards, | | Dima | | | | Wouldn't rule out technical reasons but probably they just don't want | | to | | answer questions about it. Puts the onus on you. | | | | | | Likely because HDMI has authentication handshaking built in to its | | protocol and the PC may not be savvy to such things. | | HDMI and DVI are essentially the same thing, but with different connection | and no standard for audio over DVI. Presumably you can even do HDCP over | DVI if it doesn't need the sound are part of its authentication checks. | | Most cable STB use DVI and they most certainly have HDCP enabled. DVI? Really? So when you hook it to your TV with a DVI-to-HDMI cable, do you hear anything? -- |---------------------------------------/----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/-------------------------------------| |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
In alt.tv.tech.hdtv Scott Alfter wrote:
| In article , | Glenn Millar wrote: |In reality, you wouldn't want to use the HDMI connection to connect a |PC. The best results on my 50" samsung is via the VGA connector. That |way I get full [email protected] progressive whereas 720p or 1080i is in |actually a lesser resolution. | | There's no reason you can't use the same modeline over DVI or HDMI that you | would use with VGA. On the contrary, in my experience it's been much easier | to get LCDs working on a digital connection than on an analog connection. | LCDs sold for computer use have a button on them that usually allows them to | sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 | correspondence between pixels in the framebuffer and pixels on the screen, | you then have to do extensive tinkering with modelines...and you might never | come up with a working modeline. | | My TV has a native resolution of 1280x768. I generated a modeline for that | resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just | Works. Don't forget that some poor saps are stuck with Windows and don't know how to get into the registry. Now if I could only find a TV _or_ monitor that would do video at 23.976 Hz frame rate, in LCD, in the size and resolution of interest. -- |---------------------------------------/----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/-------------------------------------| |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
In alt.tv.tech.hdtv M?ns Rullg?rd wrote:
| Glenn Millar writes: | | Scott Alfter wrote: | In article , | Glenn Millar wrote: | In reality, you wouldn't want to use the HDMI connection to connect | a PC. The best results on my 50" samsung is via the VGA | connector. That way I get full [email protected] progressive whereas | 720p or 1080i is in actually a lesser resolution. | There's no reason you can't use the same modeline over DVI or HDMI | that you | would use with VGA. On the contrary, in my experience it's been much easier | to get LCDs working on a digital connection than on an analog | connection. LCDs sold for computer use have a button on them that | usually allows them to | sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 | correspondence between pixels in the framebuffer and pixels on the screen, | you then have to do extensive tinkering with modelines...and you might never | come up with a working modeline. My TV has a native resolution of | 1280x768. I generated a modeline for that | resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just | Works. | | Your experience may well be correct with other LCD or Plasma TV's but | my reply was in relation to the Samsung screens. They don't like being | connected to a PC via HDMI. If someone get a profile for PowerStrip | that works correctly with a samsung i'd like a copy. | | My Samsung TV (LE26R41BD, panel resolution 1366x768) happily accepts | any reasonable input over HDMI. If queried, it claims to only support | the usual HDTV modes (720x480/576, 1280x720, 1920x1080i), but if | another mode is forced it works just fine. For the VGA input, all the | usual adjustments are possible through the onscreen menu. Any chance it "works just fine" on frame rates below 50 Hz, like maybe at 24 Hz? -- |---------------------------------------/----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/-------------------------------------| |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 14, 4:08 pm, Dr Hfuhruhurr wrote:
On 14 Dec, 12:51, D wrote: Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Some possible reasons below http://www.behardware.com/articles/6...ic-card-and-mo... http://www.drmblog.com/index.php?/ar...V_+_HDMI_+_HDC... Doc Hello! I have bought Gembird DVI-HDMI cable. Samsung LE-32r71b does show video through HDMI input from a computer DVI output, but of much lower quality than through D-sub input: there ara black borders around the image, the image is much less sharp. Regards, Dima |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
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How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Sun, 16 Dec 2007 09:48:40 +0100, Nigel Barker wrote:
On Sat, 15 Dec 2007 16:48:01 -0600, (Scott Alfter) wrote: My TV has a native resolution of 1280x768. I generated a modeline for that resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just Works. Are you sure about that resolution? I have seen 1024x768, 1366x768 but never 1280 pixels as the horizontal resolution. It likely only supports 1280 over DVI/HDMI but the native resolution is actually 1366 if you connected via VGA. Mines set to 1280x720. That feeds the TV an ATSC standard via either DVI or VGA. I let the TV upscale it to 1366x768 in both cases. Works just like it's supposed to. -- Want the ultimate in free OTA SD/HDTV Recorder? http://mythtv.org My Tivo Experience http://wesnewell.no-ip.com/tivo.htm Tivo HD/S3 compared http://wesnewell.no-ip.com/mythtivo.htm AMD cpu help http://wesnewell.no-ip.com/cpu.php |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
writes:
In alt.tv.tech.hdtv M?ns Rullg?rd wrote: | Glenn Millar writes: | | Scott Alfter wrote: | In article , | Glenn Millar wrote: | In reality, you wouldn't want to use the HDMI connection to connect | a PC. The best results on my 50" samsung is via the VGA | connector. That way I get full [email protected] progressive whereas | 720p or 1080i is in actually a lesser resolution. | There's no reason you can't use the same modeline over DVI or | HDMI that you would use with VGA. On the contrary, in my | experience it's been much easier to get LCDs working on a | digital connection than on an analog connection. LCDs sold for | computer use have a button on them that usually allows them to | sync up to a VGA signal, but LCD TVs rarely have this option. | To get a 1:1 correspondence between pixels in the framebuffer | and pixels on the screen, you then have to do extensive | tinkering with modelines...and you might never come up with a | working modeline. My TV has a native resolution of 1280x768. I | generated a modeline for that resolution at 60 Hz and plugged it | into xorg.conf, and over DVI, it Just Works. | | Your experience may well be correct with other LCD or Plasma TV's but | my reply was in relation to the Samsung screens. They don't like being | connected to a PC via HDMI. If someone get a profile for PowerStrip | that works correctly with a samsung i'd like a copy. | | My Samsung TV (LE26R41BD, panel resolution 1366x768) happily accepts | any reasonable input over HDMI. If queried, it claims to only support | the usual HDTV modes (720x480/576, 1280x720, 1920x1080i), but if | another mode is forced it works just fine. For the VGA input, all the | usual adjustments are possible through the onscreen menu. Any chance it "works just fine" on frame rates below 50 Hz, like maybe at 24 Hz? I haven't tried, so I don't know. -- Måns Rullgård |
How can a TV know that an image is coming from a computer, nota comsumer set-top box?
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How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 16, 1:03 am, Glenn Millar wrote:
Woody wrote: "T Shadow" wrote in message ... "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Wouldn't rule out technical reasons but probably they just don't want to answer questions about it. Puts the onus on you. Likely because HDMI has authentication handshaking built in to its protocol and the PC may not be savvy to such things. In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. Give it a try on the HDMI input. It just work out. On the other hand if you have a 1080p screen, buy good card with a HDMI output capable of 1080p. Regards Glenn.- Hide quoted text - - Show quoted text - Hello! I have bought Gembird DVI-HDMI cable. Samsung LE-32r71b does show video through HDMI input from a computer DVI output, but of much lower quality than through D-sub input: there ara black borders around the image, the image is much less sharp. Regards, Dima |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 16, 3:00 am, Måns Rullgård wrote:
Glenn Millar writes: Scott Alfter wrote: In article , Glenn Millar wrote: In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. There's no reason you can't use the same modeline over DVI or HDMI that you would use with VGA. On the contrary, in my experience it's been much easier to get LCDs working on a digital connection than on an analog connection. LCDs sold for computer use have a button on them that usually allows them to sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 correspondence between pixels in the framebuffer and pixels on the screen, you then have to do extensive tinkering with modelines...and you might never come up with a working modeline. My TV has a native resolution of 1280x768. I generated a modeline for that resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just Works. Your experience may well be correct with other LCD or Plasma TV's but my reply was in relation to the Samsung screens. They don't like being connected to a PC via HDMI. If someone get a profile for PowerStrip that works correctly with a samsung i'd like a copy. My Samsung TV (LE26R41BD, panel resolution 1366x768) happily accepts any reasonable input over HDMI. If queried, it claims to only support the usual HDTV modes (720x480/576, 1280x720, 1920x1080i), but if another mode is forced it works just fine. For the VGA input, all the usual adjustments are possible through the onscreen menu. -- Måns Rullgård - Hide quoted text - - Show quoted text - Hello! I have bought Gembird DVI-HDMI cable. Samsung LE-32r71b does show video through HDMI input from a computer DVI output, but of much lower quality than through D-sub input: there ara black borders around the image, the image is much less sharp. I do not change output resolution 1360*768 when switching from d-sub to DVI. Regards, Dima |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
John Rumm wrote:
wrote: use HDCP. It's only for protected content that it is expected to use HDCP to ensure you cannot use a monitor that is really something like a recorder, or let you tap the HDMI cable wires (it's encrypted in HDCP). Unless you install AnyDVD on it first, and then the whole sorry mess ceases to matter. ;-) Does it in fact allow the display of HD content off blu-ray disks at 1920x1080 resolution on a non-HDCP compliant monitor? I was under the impression that down-conversion was implemented at the firmware level or below. -- -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 16, 1:09 pm, Wes Newell wrote:
On Sun, 16 Dec 2007 09:48:40 +0100, Nigel Barker wrote: On Sat, 15 Dec 2007 16:48:01 -0600, (Scott Alfter) wrote: My TV has a native resolution of 1280x768. I generated a modeline for that resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just Works. Are you sure about that resolution? I have seen 1024x768, 1366x768 but never 1280 pixels as the horizontal resolution. It likely only supports 1280 over DVI/HDMI but the native resolution is actually 1366 if you connected via VGA. Mines set to 1280x720. That feeds the TV an ATSC standard via either DVI or VGA. I let the TV upscale it to 1366x768 in both cases. Works just like it's supposed to. -- Want the ultimate in free OTA SD/HDTV Recorder?http://mythtv.org My Tivo Experiencehttp://wesnewell.no-ip.com/tivo.htm Tivo HD/S3 comparedhttp://wesnewell.no-ip.com/mythtivo.htm AMD cpu helphttp://wesnewell.no-ip.com/cpu.php The upscaling makes the image less sharp, doesn't it? Regards, Dima |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 16, 4:41 am, wrote:
In alt.tv.tech.hdtv Scott Alfter wrote: | In article , | Glenn Millar wrote: |In reality, you wouldn't want to use the HDMI connection to connect a |PC. The best results on my 50" samsung is via the VGA connector. That |way I get full [email protected] progressive whereas 720p or 1080i is in |actually a lesser resolution. | | There's no reason you can't use the same modeline over DVI or HDMI that you | would use with VGA. On the contrary, in my experience it's been much easier | to get LCDs working on a digital connection than on an analog connection. | LCDs sold for computer use have a button on them that usually allows them to | sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 | correspondence between pixels in the framebuffer and pixels on the screen, | you then have to do extensive tinkering with modelines...and you might never | come up with a working modeline. | | My TV has a native resolution of 1280x768. I generated a modeline for that | resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just | Works. Don't forget that some poor saps are stuck with Windows and don't know how to get into the registry. Now if I could only find a TV _or_ monitor that would do video at 23.976 Hz frame rate, in LCD, in the size and resolution of interest. -- |---------------------------------------/-----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/--------------------------------------| Why do you need the 23.976 Hz frame rate in LCD? Regards, Dima |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 16, 3:00 am, Måns Rullgård wrote:
Glenn Millar writes: Scott Alfter wrote: In article , Glenn Millar wrote: In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. There's no reason you can't use the same modeline over DVI or HDMI that you would use with VGA. On the contrary, in my experience it's been much easier to get LCDs working on a digital connection than on an analog connection. LCDs sold for computer use have a button on them that usually allows them to sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 correspondence between pixels in the framebuffer and pixels on the screen, you then have to do extensive tinkering with modelines...and you might never come up with a working modeline. My TV has a native resolution of 1280x768. I generated a modeline for that resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just Works. Your experience may well be correct with other LCD or Plasma TV's but my reply was in relation to the Samsung screens. They don't like being connected to a PC via HDMI. If someone get a profile for PowerStrip that works correctly with a samsung i'd like a copy. My Samsung TV (LE26R41BD, panel resolution 1366x768) happily accepts any reasonable input over HDMI. If queried, it claims to only support the usual HDTV modes (720x480/576, 1280x720, 1920x1080i), but if another mode is forced it works just fine. For the VGA input, all the usual adjustments are possible through the onscreen menu. -- Måns Rullgård - Hide quoted text - - Show quoted text - Thanks Måns Rullgård for your reply! My Samsung TV (LE32R71B, panel resolution 1366x768) accepts 1360x768 resolution over HDMI too, but the image is much less sharp than over d- sub (after applying the TV automatic calibration), and there are black borders around the image. Do you have the same borders and less sharp image? If queried, it claims to only support the usual HDTV modes (720x480/576, 1280x720, 1920x1080i) too. Regards, Dima |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 16, 4:42 am, wrote:
In alt.tv.tech.hdtv M?ns Rullg?rd wrote: | Glenn Millar writes: || Scott Alfter wrote: | In article , | Glenn Millar wrote: | In reality, you wouldn't want to use the HDMI connection to connect | a PC. The best results on my 50" samsung is via the VGA | connector. That way I get full [email protected] progressive whereas | 720p or 1080i is in actually a lesser resolution. | There's no reason you can't use the same modeline over DVI or HDMI | that you | would use with VGA. On the contrary, in my experience it's been much easier | to get LCDs working on a digital connection than on an analog | connection. LCDs sold for computer use have a button on them that | usually allows them to | sync up to a VGA signal, but LCD TVs rarely have this option. To get a 1:1 | correspondence between pixels in the framebuffer and pixels on the screen, | you then have to do extensive tinkering with modelines...and you might never | come up with a working modeline. My TV has a native resolution of | 1280x768. I generated a modeline for that | resolution at 60 Hz and plugged it into xorg.conf, and over DVI, it Just | Works. | | Your experience may well be correct with other LCD or Plasma TV's but | my reply was in relation to the Samsung screens. They don't like being | connected to a PC via HDMI. If someone get a profile for PowerStrip | that works correctly with a samsung i'd like a copy. | | My Samsung TV (LE26R41BD, panel resolution 1366x768) happily accepts | any reasonable input over HDMI. If queried, it claims to only support | the usual HDTV modes (720x480/576, 1280x720, 1920x1080i), but if | another mode is forced it works just fine. For the VGA input, all the | usual adjustments are possible through the onscreen menu. Any chance it "works just fine" on frame rates below 50 Hz, like maybe at 24 Hz? -- |---------------------------------------/-----------------------------------| | Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below | | first name lower case at ipal.net / | |------------------------------------/--------------------------------------| Thanks Phil Howard for your reply! Why do you need frame rates below 50 Hz, like 24 Hz? Regards, Dima |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
wrote in message ... In alt.tv.tech.hdtv steveo wrote: | | wrote in message | ... | In alt.tv.tech.hdtv Woody wrote: | | | | "T Shadow" wrote in message | | ... | | "D" wrote in message | | | ... | | Hello! | | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | | image from a computer through its HDMI input, but through its d-sub | | only. Is it really true? How can the TV know that an image is coming | | from a computer, not a comsumer set-top box? My video card is | | Gigabyte | | HD 2600Pro. I would like to use a DVI-HDMI cable. | | Regards, | | Dima | | | | Wouldn't rule out technical reasons but probably they just don't want | | to | | answer questions about it. Puts the onus on you. | | | | | | Likely because HDMI has authentication handshaking built in to its | | protocol and the PC may not be savvy to such things. | | HDMI and DVI are essentially the same thing, but with different connection | and no standard for audio over DVI. Presumably you can even do HDCP over | DVI if it doesn't need the sound are part of its authentication checks. | | Most cable STB use DVI and they most certainly have HDCP enabled. DVI? Really? So when you hook it to your TV with a DVI-to-HDMI cable, do you hear anything? Yes, DVI can carry HDCP encrypted video and yes it is a common interface from cable STB. They do not pass audio over DVI. The two different HD STBs I have had from Cox have had both coaxial and optical audio connections, along with stereo RCA of course. I keep see people making comments that they expect it to. Is there some specification for DVI to carry audio that some computers and monitors use? I'm pretty sure no monitors marketed as TVs accept audio over DVI and everything I have ever read on DVI says that it does not carry audio. steveo |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 17, 1:38 am, "T Shadow" wrote:
"D" wrote in message ... On Dec 16, 1:03 am, Glenn Millar wrote: Woody wrote: "T Shadow" wrote in message ... "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Wouldn't rule out technical reasons but probably they just don't want to answer questions about it. Puts the onus on you. Likely because HDMI has authentication handshaking built in to its protocol and the PC may not be savvy to such things. In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. Give it a try on the HDMI input. It just work out. On the other hand if you have a 1080p screen, buy good card with a HDMI output capable of 1080p. Regards Glenn.- Hide quoted text - - Show quoted text - Hello! I have bought Gembird DVI-HDMI cable. Samsung LE-32r71b does show video through HDMI input from a computer DVI output, but of much lower quality than through D-sub input: there ara black borders around the image, the image is much less sharp. Regards, Dima I was under the impression HDCP was only used for protected content but according to the link below it may be needed to get full resolution or even a picture. Does your video card support HDCP? An article I read last year indicated none did. That probably has changed. http://en.wikipedia.org/wiki/Hdcp- Hide quoted text - - Show quoted text - Yes, my video card supports HDCP: http://www.giga-byte.co.uk/Products/...ProductID=2589 |
How can a TV know that an image is coming from a computer, not acomsumer set-top box?
On Dec 18, 8:32 am, "steveo" wrote:
wrote in message ... In alt.tv.tech.hdtv steveo wrote: | | wrote in message ... | In alt.tv.tech.hdtv Woody wrote: | | | | "T Shadow" wrote in message | ... | | "D" wrote in message | | | ... | | Hello! | | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | | image from a computer through its HDMI input, but through its d-sub | | only. Is it really true? How can the TV know that an image is coming | | from a computer, not a comsumer set-top box? My video card is | | Gigabyte | | HD 2600Pro. I would like to use a DVI-HDMI cable. | | Regards, | | Dima | | | | Wouldn't rule out technical reasons but probably they just don't want | | to | | answer questions about it. Puts the onus on you. | | | | | | Likely because HDMI has authentication handshaking built in to its | | protocol and the PC may not be savvy to such things. | | HDMI and DVI are essentially the same thing, but with different connection | and no standard for audio over DVI. Presumably you can even do HDCP over | DVI if it doesn't need the sound are part of its authentication checks. | | Most cable STB use DVI and they most certainly have HDCP enabled. DVI? Really? So when you hook it to your TV with a DVI-to-HDMI cable, do you hear anything? Yes, DVI can carry HDCP encrypted video and yes it is a common interface from cable STB. They do not pass audio over DVI. The two different HD STBs I have had from Cox have had both coaxial and optical audio connections, along with stereo RCA of course. I keep see people making comments that they expect it to. Is there some specification for DVI to carry audio that some computers and monitors use? I'm pretty sure no monitors marketed as TVs accept audio over DVI and everything I have ever read on DVI says that it does not carry audio. steveo- Hide quoted text - - Show quoted text - Most of ATI Redeon HD cards output HD audio trough DVI. See http://www.giga-byte.co.uk/Products/...ProductID=2589 or http://ati.amd.com/products/Radeonhd2400/specs.html |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
D wrote:
On Dec 18, 8:32 am, "steveo" wrote: wrote in message ... In alt.tv.tech.hdtv steveo wrote: wrote in message ... In alt.tv.tech.hdtv Woody wrote: "T Shadow" wrote in message ... "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Wouldn't rule out technical reasons but probably they just don't want to answer questions about it. Puts the onus on you. Likely because HDMI has authentication handshaking built in to its protocol and the PC may not be savvy to such things. HDMI and DVI are essentially the same thing, but with different connection and no standard for audio over DVI. Presumably you can even do HDCP over DVI if it doesn't need the sound are part of its authentication checks. Most cable STB use DVI and they most certainly have HDCP enabled. DVI? Really? So when you hook it to your TV with a DVI-to-HDMI cable, do you hear anything? Yes, DVI can carry HDCP encrypted video and yes it is a common interface from cable STB. They do not pass audio over DVI. The two different HD STBs I have had from Cox have had both coaxial and optical audio connections, along with stereo RCA of course. I keep see people making comments that they expect it to. Is there some specification for DVI to carry audio that some computers and monitors use? I'm pretty sure no monitors marketed as TVs accept audio over DVI and everything I have ever read on DVI says that it does not carry audio. steveo- Hide quoted text - - Show quoted text - Most of ATI Redeon HD cards output HD audio trough DVI. See http://www.giga-byte.co.uk/Products/...ProductID=2589 or http://ati.amd.com/products/Radeonhd2400/specs.html FWIW, HDMI doesn't have separate wires for audio, so it has to be multiplexed into the datastream. That being the case there's no reason it can't be carried over DVI. -- -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
"D" wrote in message ... On Dec 18, 8:32 am, "steveo" wrote: wrote in message ... In alt.tv.tech.hdtv steveo wrote: | | wrote in message ... | In alt.tv.tech.hdtv Woody wrote: | | | | "T Shadow" wrote in message | ... | | "D" wrote in message | | | ... | | Hello! | | According to Samsung LE-32r71b HDTV manual the TV cannot receive an | | image from a computer through its HDMI input, but through its d-sub | | only. Is it really true? How can the TV know that an image is coming | | from a computer, not a comsumer set-top box? My video card is | | Gigabyte | | HD 2600Pro. I would like to use a DVI-HDMI cable. | | Regards, | | Dima | | | | Wouldn't rule out technical reasons but probably they just don't want | | to | | answer questions about it. Puts the onus on you. | | | | | | Likely because HDMI has authentication handshaking built in to its | | protocol and the PC may not be savvy to such things. | | HDMI and DVI are essentially the same thing, but with different connection | and no standard for audio over DVI. Presumably you can even do HDCP over | DVI if it doesn't need the sound are part of its authentication checks. | | Most cable STB use DVI and they most certainly have HDCP enabled. DVI? Really? So when you hook it to your TV with a DVI-to-HDMI cable, do you hear anything? Yes, DVI can carry HDCP encrypted video and yes it is a common interface from cable STB. They do not pass audio over DVI. The two different HD STBs I have had from Cox have had both coaxial and optical audio connections, along with stereo RCA of course. I keep see people making comments that they expect it to. Is there some specification for DVI to carry audio that some computers and monitors use? I'm pretty sure no monitors marketed as TVs accept audio over DVI and everything I have ever read on DVI says that it does not carry audio. steveo- Hide quoted text - - Show quoted text - Most of ATI Redeon HD cards output HD audio trough DVI. See http://www.giga-byte.co.uk/Products/...ProductID=2589 or http://ati.amd.com/products/Radeonhd2400/specs.html No where on that page does it say that there is audio over the DVI. It does say that you can get "HDMI and 5.1 surround audio (by optional adapter)" but that would be achieved by combining the output from the DVI port and one of the audio ports through the aforementioned adapter. steveo |
How can a TV know that an image is coming from a computer, not a comsumer set-top box?
"T Shadow" wrote in message ... "D" wrote in message ... On Dec 17, 1:38 am, "T Shadow" wrote: "D" wrote in message ... On Dec 16, 1:03 am, Glenn Millar wrote: Woody wrote: "T Shadow" wrote in message ... "D" wrote in message ... Hello! According to Samsung LE-32r71b HDTV manual the TV cannot receive an image from a computer through its HDMI input, but through its d-sub only. Is it really true? How can the TV know that an image is coming from a computer, not a comsumer set-top box? My video card is Gigabyte HD 2600Pro. I would like to use a DVI-HDMI cable. Regards, Dima Wouldn't rule out technical reasons but probably they just don't want to answer questions about it. Puts the onus on you. Likely because HDMI has authentication handshaking built in to its protocol and the PC may not be savvy to such things. In reality, you wouldn't want to use the HDMI connection to connect a PC. The best results on my 50" samsung is via the VGA connector. That way I get full [email protected] progressive whereas 720p or 1080i is in actually a lesser resolution. Give it a try on the HDMI input. It just work out. On the other hand if you have a 1080p screen, buy good card with a HDMI output capable of 1080p. Regards Glenn.- Hide quoted text - - Show quoted text - Hello! I have bought Gembird DVI-HDMI cable. Samsung LE-32r71b does show video through HDMI input from a computer DVI output, but of much lower quality than through D-sub input: there ara black borders around the image, the image is much less sharp. Regards, Dima I was under the impression HDCP was only used for protected content but according to the link below it may be needed to get full resolution or even a picture. Does your video card support HDCP? An article I read last year indicated none did. That probably has changed. http://en.wikipedia.org/wiki/Hdcp- Hide quoted text - - Show quoted text - Yes, my video card supports HDCP: http://www.giga-byte.co.uk/Products/...ProductID=2589 I'd assume "HDMI ready" means something else is needed and not presently supported. DVI is not HDMI and has no pins for sound.. DVI can carry HDCP encrypted content, but not all implementations of DVI have the decoders. steveo |
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