As part of our demo we did HDMI with a $.50 VCSEL biased with a BF862 and an off the shelf 10G TIA through 100' of cheap fiber.
I'm currently using this for 4K from my PC to my 43" monitor (occasionally TV).....
http://www.argos.co.uk/static/Product/partNumber/1084551.htm?CMPID=GS001&_$ja=cgid:12488203370|tsid:59158|cid:200217410|lid:94809232970|nw:g|crid:66128550770|rnd:10545786780268098387|dvc:c|adp:1o1|bku:1&gclid=COTs4ae76MoCFScGwwodOJUDVg
The picture is better than the cable.... cheap black connectors, in fact the whole cable oozes cheapness but it works🙂
http://www.argos.co.uk/static/Product/partNumber/1084551.htm?CMPID=GS001&_$ja=cgid:12488203370|tsid:59158|cid:200217410|lid:94809232970|nw:g|crid:66128550770|rnd:10545786780268098387|dvc:c|adp:1o1|bku:1&gclid=COTs4ae76MoCFScGwwodOJUDVg
The picture is better than the cable.... cheap black connectors, in fact the whole cable oozes cheapness but it works🙂
The CNET guy also did some cable tests that he links to. They pretty much mimic my experience. Cheap cables work most of the time. But the HDMI send and receive chipsets can make a difference as to whether a cable works or not.
Oddly, we have a lot better luck with cheap HDMI cables than with DVI. In fact we've given up going over 35' on DVI. It's supposed to be the same video signal, but maybe the receivers aren't' as good.
Oddly, we have a lot better luck with cheap HDMI cables than with DVI. In fact we've given up going over 35' on DVI. It's supposed to be the same video signal, but maybe the receivers aren't' as good.
used DVI for a monitor, didn't recognise it, changed to HDMI no problem, I wonder whether there is a hand shaking problem....
shouldn't be. HDMI should be good for 50ft and only reason I can see for DVI not going that high would be if the refresh rate is different.
Display port is the newest interface, I will dig into my rubbish ....
The DVI connection was definitely a handshaking issue, it wouldn't recognise the monitor or its resolution, whereas as soon as I plugged in my Audioquest Diamond HDMI lead it recognised the monitor and its resolution....
The DVI connection was definitely a handshaking issue, it wouldn't recognise the monitor or its resolution, whereas as soon as I plugged in my Audioquest Diamond HDMI lead it recognised the monitor and its resolution....
Yes, especially given that both HDMI and DVI use TDMS as their basic analog signal on which the digital data are coded.
https://en.wikipedia.org/wiki/Transition-minimized_differential_signaling
BTW it is my understanding that the voltage levels, and wave forms, and signaling frequencies are comparable.
I have a number of DVI to HDMI converters in use, and they appear to be very simple passive adapters.
My take is that any observed differences are due to varying implementations, not the basic technology.
One of the problems is that HDMI is that is not just one thing. The standard has evolved over the years by quite a bit. The maximum video signalling frequencies were upped early on, and extra conductors for computer networking and looping back video were added along the way.
Any of these features can render a old-tech HDMI cable unusable with modern equipment.
Hell marce, anything from Argos is cheap. Mind you, if it works and that's all that counts.
Having said that, I know twin flex works ok with my speakers and amp but I just can't bring myself to use it. Its the 'peekers curse' at work I am afraid. I bought some fantastic 5mm cross sectional diameter multi- strand in Akihabara when I lived over in Japan. Each cable pair weighs a few Kg. Good solid over engineering just like those TKD pots that go for a few hundred bucks.
My wife especially objects to them, so I hide them behind the drapes for the most part.
Having said that, I know twin flex works ok with my speakers and amp but I just can't bring myself to use it. Its the 'peekers curse' at work I am afraid. I bought some fantastic 5mm cross sectional diameter multi- strand in Akihabara when I lived over in Japan. Each cable pair weighs a few Kg. Good solid over engineering just like those TKD pots that go for a few hundred bucks.
My wife especially objects to them, so I hide them behind the drapes for the most part.
Ditto, I have dozens. All passive, they work fine. The HDMI to VGA cables, not so much. 🙂
Quite possible. No really good tests were done. It's just accumulated experience with dozens of different cables and devices on a daily basis. 50' HDMI - rarely a problem. 50' DVI, very often a problem. When your livelihood depends on it working, you become cautious.
I did some digging around with friends who are into this stuff. The best that they could come up with (unless it is a frame rate issue) is that HDMI cables are generally better specified. It was also pointed out that the different pairs are likely to have different twist rates to control cross-talk which will set the max length over which things work.
So nothing conclusive and life's too short to take a pile of cables apart...
So nothing conclusive and life's too short to take a pile of cables apart...
I didn't want to spend loads on a cable and find that the set up was no good, now I don't have to spend loads because it works... One happy cheapskate.
Bill, looking at some pro monitor specs last night, one does 1billion colours on HDMI only a few million on DVI so I wonder if there is a data reduction... or whether HDMI can handle 10 bit and DVI only 8....
True, but getting back on topic, obviously not a property of the cable itself, because one can route HDMI signals over DVI cables and vice-versa.
DVI and HDMI are two different standards that include some fairly complex details about the logic of the fairly complex circuitry at each end of the cable. That's where differences like color space depth come about.
I also wonder is the HDMI receivers are just newer and better than the DVI chipsets. That might be hard to test, but would explain the differences we've been seeing.
You are wrong. Digital cables do have different sonic and visual differences. But if you wish to remain convinced it not possible, so be it. My first experiments with them was with two identical USB cables. One as received and the other cryogenically treated. Cables were both 10 feet long. Sonic improvement was obvious. Close your textbooks and give it a try. It will require a stereo better than sold by white vans and hearing not truncated by age or poor hygiene.
Many (most?) current LED-backlit LCD TVs will switch off the backlight, even momentarily, whenever a full-screen, full-black image is detected. This "feature" can be used as an HDMI sparkly detector.
When I first tried to run my 4K TV at 60 Hz (HDMI 2.0) with a new video card, I thought I could see sparklies, but they are a bit elusive sometimes to say the least. To attempt a more visible test, I put up a full-screen, completely black GIF image. Sure enough, in a darkened room I could see the backlight intermittently flashing on & off behind the black image - the sparklies were being detected by the TV as a non-black scene.
I then macheted my way into the cable jungle in the closet and pulled out a different <$10 generic, Monoprice-type HDMI cable to replace the <$10 cable I had started with, and the sparklies disappeared. The black screen stayed black, no backlight, for as long as I cared to watch it (several minutes). I've been using that cable for close to a year now with no glitches.
Both cables are marked "HDMI 1.4 High Speed With Ethernet." There are some cosmetic differences in the connectors, but they're basically the same grade of cheapo cable. Both work perfectly at every other resolution/refresh rate I've tried them at - one just couldn't quite hack it at HDMI 2.0.
- Jim
When I first tried to run my 4K TV at 60 Hz (HDMI 2.0) with a new video card, I thought I could see sparklies, but they are a bit elusive sometimes to say the least. To attempt a more visible test, I put up a full-screen, completely black GIF image. Sure enough, in a darkened room I could see the backlight intermittently flashing on & off behind the black image - the sparklies were being detected by the TV as a non-black scene.
I then macheted my way into the cable jungle in the closet and pulled out a different <$10 generic, Monoprice-type HDMI cable to replace the <$10 cable I had started with, and the sparklies disappeared. The black screen stayed black, no backlight, for as long as I cared to watch it (several minutes). I've been using that cable for close to a year now with no glitches.
Both cables are marked "HDMI 1.4 High Speed With Ethernet." There are some cosmetic differences in the connectors, but they're basically the same grade of cheapo cable. Both work perfectly at every other resolution/refresh rate I've tried them at - one just couldn't quite hack it at HDMI 2.0.
- Jim
Two words: sighted evaluation.
Here's a book that will explain why you think that the cables sound different, and that I predict you will totally hate and not be able to read more than 20 pages of:
You Are Not So Smart: Why You Have Too Many Friends on Facebook, Why Your Memory Is Mostly Fiction, an d 46 Other Ways You're Deluding Yourself - Kindle edition by David McRaney. Politics & Social Sciences Kindle eBooks @ Amazon.com.
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