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What's the Matter with HDMI?
mrnomas writes with a link to the Audioholics site, which wonders why the HDMI standard is such a mess? The article's author suggests that the format was designed for the benefit of the content-producers and not the consumer. The result is a signal that's hard to route and switch, as well and unnecessarily complicated cable assemblies. They reach back to the DVI standard to see what might be done to make HDMI a little more consumer-friendly, with numerous technical elements woven through the discussion. "DVI lacked a couple of things which the consumer audio/video industry wanted. It was implemented on a variety of HD displays and source devices, but it was confusing for the consumer because of the many variants on the standard and different connector configurations, and it didn't carry audio signals. A consortium to develop and promote a new interface, HDMI, was formed; the idea was to come up with a standard which could be implemented more uniformly, was less confusing, and offered the option of routing audio signals along with video."
...what might be done to make HDMI a little more consumer-friendly?
Drop the DRM.
------ Take away the right to say fuck and you take away the right to say fuck the government.
I always considered HDMI a anti-consumer,DRM laden, proprietary, and expensive USB cord. What's wrong with DVI? It's more compatible and I don't believe it requires any licensing to use in a product. So I ask you again, what is wrong with DVI? Why is everyone so HDMI-centric?
622677120
What we need is an Open Source standard for connecting audio and video devices. That way every piece of gear would have a consistent interface and connections, and it would be easy to configure and understand.
Especially for people without specialized technical expertise.
Three Squirrels
The first thing that needs to be done is to create legislation that makes DRM illegal. This would remove the threat that HDMI poses to other technologies (such as component) and force it to compete on technical merit. Not to mention solve a lot of other consumer issues.
The second thing to be done - obviously - is make a single standard and stick to it; however that requires cooperation among the manufacturers and seems unlikely at best. Still, we can always ask them nicely, and follow up by voting with our wallets.
HDMI has been a nightmare for me. I started out with a hi-def (I thought) component video system, fully capable of 1080p bandwidth-wise and full of switching capabilities I liked and thought could take me quite some distance down the road; then the collusion between manufacturers not to provide full hi-def on component, but only on HDMI, came about, and there went that investment out the window. That system can only do 720p now (I find 1080i to be useless - part of the point was to get RID of flicker) and it lives in my basement. I had to re-buy my theater system, invest in a bunch of new cabling to reproduce signal routing I already had in place that was perfectly adequate, technically speaking... man. That was one irritating evolution.
Also, I have yet to see a single home theater receiver that has a reasonable number of HDMI inputs. HD-DVD. Blue-ray. PS3. a new XBox 360. A computer. A camera. That's six, even if you only have one of each. And you need lots of component, S-Video and composite inputs with up-conversion; as well as standard audio, coaxial digital and optical digital... just because HDMI canwant it to. There are plenty of older tech gadgets out there that could still be very reasonable assets to such a system but need other types of inputs. So far, typically you find 2 or 3 HDMI inputs on a higher end theater system.
I've fallen off your lawn, and I can't get up.
The HDCP copy protection crap is what causes HDMI devices to have trouble communicating with each other, especially if there is anything between the source and display devices, like an A/V receiver or HDMI switch box.
They are too stupid to realize that pirates aren't going to copy shows and movies by capturing uncompressed frames coming through the cables; they're going to make copies of the discs. But they insist on making the honest customers suffer through the slow cryptographic handshake that occurs any time you switch on an HDMI device or even switch sources on a TV.
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There is inferior bacteria on the interior of your posterior.
As a physicist, it drives me nuts how much people are willing to pay for Monster cables or other "high-end" stuff. Need speaker wire? Just buy some heavy-gauge electrical wire. Home Depot sells 500 feet (152 m) of stranded 2-conductor 10-gauge (2.588 mm dia.) wire for about $85 USD. A similar length of thinner 12-gauge (2.053 mm dia.) Monster wire would cost a small fortune.
Some of you may note that, at 20 kHz (high end of human hearing range), the skin depth of copper is only about 0.47 mm, and so for high frequency, your conductivity will only scale with wire circumference, not area. That's true for solid-core, but keep in mind the Home Depot cable I mention is stranded, and has a 25% larger circumference than the Monster stuff. That should be more than enough to make up for any slight resistivity advantage the Monster cable might have from using purer copper (assuming they do).
What's really funny is the people who assume all this stuff matters for digital signals (as I saw in a few of the "reviews" on the Monster website). Unless you're stringing really long cables or your no-name stuff is really, really bad, there won't be a difference. Bits are bits, and small amounts of analog noise will be ignored.
You can buy a 3ft HDMI cable for something like $4, 6ft for $6. Yes you can buy some ludicrously expensive HDMI cables but you can blame consumer ignorance and retailer greed for that. There is no reason to spend that much seeing as it is digital.
I see no reason at all to use component in an everyday situation if your device (be it a 360, PS3, DVD player etc.) and TV both support HDMI. It would be as dumb as connecting your PC to your monitor with VGA even when both have DVI-D support. The picture quality is far better over HDMI / DVD-D because it's digital. Analogue by definitiion degrades so even the best composite signal will still be worse than HDMI.
The simple fact is that the ONLY choice for HD digital video transmission SHOULD have been fiber optic:
1) With two fibers in a cable, there would be more than enough bandwidth for 1080P + digital surround sound. It is future proof.
2) It is fully bidirectional, which can be useful for error correction or detection, or for signal confirmation, or perhaps for two-way audio/video.
3) It can operate at great distance.
4) The cables would be FAR cheaper than the extremely complex and expensive DVI/HDMI cables.
5) With serial transmissions over a single pair, the encoding could be changed at any point in the future for different formats.
Let's look at the author's problems with twisted pairs and what it would mean with optical:
1) Time- not a problem, because it is all serial
2) Resistance: fiber has none
3) Skin effect: fiber has none
4) Capacitance: fiber has none
5) Impedance: fiber has none
6) Crosstalk: fiber has none
7) Inductance: fiber has none
Lets add
8) RFI: fiber has none
9) Signal leak (causing potential interference with OTHER devices): fiber has none
10) Cable thickness: fiber would be 6+ times narrower and easier to route and hide
11) Connector size: perhaps 4 times smaller with fiber? (Think handhelds, laptops, etc)
When I first saw DVI, I thought the designers had gone insane. WHO CARES about analog signals? We already have PLENTY of cable standards for that (VGA, Component, SVideo, Composite)! It looks tremendously complex and overkill to relay a stream of information THAT IS ALREADY being delivered serially over the air, from DVD's, from tuners, from ANY source. Then they "fixed" it with HDMI?? Right- make the connector IMPOSSIBLE for anyone to ever make their own or repair, add audio, and ignore all other issues (oh, and the cable costs are even more expensive than the already expensive DVI). Then to have to throw "dual link" into the mess because the "standard" set of over a dozen wires doesn't have enough bandwidth...
About the only negative with fiber is that you can't kink the cable and expect it to survive. I say "small price to pay". Oh well, maybe the next revision they will wake up??
Don't buy anything with DRM on it. Let their accountants do your talking.
Don't hack anything with DRM on it. Don't help other people watch their crap for free.
Don't watch anything with DRM on it. Make them afraid of losing mind share.
Instead: Watch DRM wither and die.