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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 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) |
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