Home Made HD Cinema Cameras - Technical Discussion

[Wayne Morellini]

Yes, I believe it is dual core, that is what VIA told me 4 months ago, but this article doesn't seem toi clear, plus I wasn't in a very reading state of mind when I read it.

The thing is their new cores will be 1W @ !GHZ, they could add 4, 8, or 20 cores and still be low powered. 2Ghz will be 7W each core. That is the same reason that ARM embeeded chips are clocked down so much, to give them mvery low powered specs.

[Wayne Morellini]

Here is an interesting article on IBM Millipede technology:

http://www.tomshardware.com/hardnews...11_162423.html

Basically they can put 100GB on a chip sized device (inside a SD card). Now if they can keep the cost comparable to HD (they might be able to undercut it I think) low capacity hard disks, and high capacity SD cards, might have a hard time. Put 10 together you have 1 terabyte is the size of less than a 1.8 inch drive. Triple that and we could be talking about capacity for Ultra HD.

Now the downside, been waiting for this technology for years, and it will still be a couple of more years before it is scheduled to come out. I find it remarkable they did it at all, considering how fiddly the technology is compared to a circuited alternative (and I wonder what happens when you drop one of these).

[Wayne Morellini]

Obin, dual processor, unfortunately.

Wayne.

[Wayne Morellini]

Read over Tomshardware Cebit coverage.

Would be interesting to know what you can do with 12Mb/s plus on Dual Layer now days.

[Wayne Morellini]

JVC and Panasonic are introducing sub $10K cameras. I Imagine they are to be sub $5K too. They are finally moving beyond the limping HDV-1 with 50-100Mb/s. Hopefully somebody can do this at Mpeg2 variable compression with true RAW component output. They could easily record this 100Mb/s to HDD with this.

http://www.hdvinfo.net/articles/jvcp...d100teaser.php

Now a question comes up, is wide aperture (for shallow DOF) 1/3 inch (just question, I prefer at least 1/2 inch) with dual slope good enough? Dual slope provides more range, though not more sensitivity at the low end. So the question arises, like what Rai did with wide aperture lens on Drake, can it be done to make a dual slope 1/3 inch look like a 2/3 inch?

[Radek Svoboda]

What is dual slope? 1/3" will always be 1/3". You need 35 mm DOF for nice artist pictures.

[Wayne Morellini]

Dual slope is a scheme to greatly extend a chips latitude, so a smaller chip can get similar latitude to a standard 2/3rd. I believe it is safe to say that this definitely works for 1/2inch in comparison to 2/3rd. It works by double sampling a pixel. If the individual pixel reaches a certain level it resets and samples again, the data is amalgamated into a pixel value and sent.

What Rai did on the Drake was use a very fast lens, 1:0.75 I think. At wide apertures the DOF of field is reduced, thus giving him similar to 35mm DOF of less aperture size.

So what I am looking here, is can we get away with using similar technique to get 2/3rd inch value on a smaller chip.

[Wayne Morellini]

http://www.macrumors.com/pages/2005/...30102917.shtml

Others:
http://www.appleinsider.com/article.php?id=973

Interesting.

Just found this link JVC HD camera:

http://www.adcom.it/VisRecord.asp?ID=GY-HD100E

Toshiba 1 minute to 80% charge, 1% drop over 1000 cycles, Lithium Ion batteries, next year

http://www.macrumors.com/pages/2005/...29192959.shtml

Also at Brighthand and similar story over at tomshardware mentioning high discharge capability ( a problem for ordinary Lithiums).

A good laugh:

http://www.theregister.co.uk/2005/04...bs_joins_ikea/

That Ikea chair must be Steve Jobs Chair for Bill, certainly reminds me of a certain operating System.

1.8 inch drives are up around 80GB+ now.

[Wayne Morellini]

This is an Wired article on a Digital Cinema projection:

http://www.wired.com/wired/archive/1...ban&topic_set=

[Wayne Morellini]

Silent passive power supplies:
http://www6.tomshardware.com/howto/20050401/index.html

Magnetic heat exchangers:
http://www.theinquirer.net/?article=22309

ATI:
http://www.theregister.co.uk/2005/04...gen_chip_june/

Extra storage:
http://www.theregister.co.uk/2005/04...tachi_storage/
http://www.tomshardware.com/hardnews...04_172017.html


More on those 100GB SD millipede stuff (this stuff has been under development for years, so the release dates canbe taken more accurately, though I have seen many other "seemingly" technologies disappear):

http://blogs.zdnet.com/BTL/index.php?p=1143&tag=nl.e539
http://www.research.ibm.com/journal/.../vettiger.html


Camera Developers. Various portable Hardrive benchmarks (please note the 30GB 1.85inch, I suspect faster when the 80/90GB drives get here):

http://www6.tomshardware.com/storage...rocket-05.html


Interesting:
http://www.cnn.com/2005/TECH/ptech/0....ap/index.html

[Wayne Morellini]

Tech tip:

If you are blowing 20 Watts of hot air off a heat-sink, you maybe able to reclaim some of that heat and turn it back into electricity. I don't know what technologies are available nowadays but I think they were at least a couple of percent on human skin, a few years ago. The bigger the temperature difference the more efficient the process, but I don't know if you can get 10 Watt 50% return. But, in design, every little trick can add upto to the 50% saving.

Next tip, if you are blowing the hot air out, be careful not to blow it on people or flammable objects, realising that some warm/dry fabrics spontaneously combust, even on normal warm days all by themselves (minute chemical change/combustion builds up heat leading to fire). This doesn't happen very often, but if you got a 200/100 Watt personal heater (camera) on your shoulder blowing hot air into your collar, you get the point (you get hot, and if you are really unlucky so do your fabrics). Note, you might be able to reduce the heat enough being blown as well, so it is not necessarily a problem.

Finale tip, this is public release to invalidate other people from patenting, but if I do not have to claim this as a public release to invalidate them from patenting, or there is any possibility of personal patent still exists for me, I retain those relevant rights to this IP and limit this disclosure from being general public to private in commercial in confidence to what ever extent needed. (to stop other people from locking up the technology in patent, to stop people from using it):

Lots of civilised countries get quiet cold (unlike here, in this part of Australia), and camera men must as well. So, I was planning (on my case design) to passively (or via fan) vent waste heat onto, or into the clothing, or skin, of the camera operator, to keep him/her warm. This would be done either directly on the operators clothing/skin, into (among) or under layers of cloths, or via venting mechanisms (ie tubes, heat exchanger, vests etc ad infinitum) onto or among the same. So basically the whole process can be well hidden from the casual observers eye, with maybe only as little as a tube showing and connected. To regulate heat, only a portion of the air need be used, it canbe cooled (i.e, by mixing with surrounding air etc) either manually or automatically. It canbe manually, or automatically, turned off/airflow diverted or turned on, fully or partly.

The design I was going to use was simple, so it doesn't require too much, unless you want to make things like vests, that will not kill you from heat stroke or combustion. Done right, it will be very good on a winter's day, and everybody will suddenly like being around you, done wrong that hot heat spot on your otherwise frozen skin/body, will be annoying.

Wayne.

[Richard Mellor]

hi wayne; this is a link to some new products
It also has the latest ibis chips.

http://www.machinevisiononline.org/p...ex.cfm?cat=193

[Wayne Morellini]

Good one, that answers some questions. That Lupa looks interesting.

[Steve Nordhauser]

FYI, most of those Fill Factory parts have been available. We ship a camera with the 6600 sensor, the IBIS-5AE and are developing a camera with the LUPA-4000. That part is currently slated to be MONO ONLY.
Steve

[Wayne Morellini]

May launch, Autumn availability:
http://www.theregister.co.uk/2005/04..._xbox2_launch/

Two Hard drives (one removable).