Introducing ATI's OCUR

Although their GPU teams have gone through their ups and downs, the one group at ATI that has consistently done well is their multimedia team. While they have always been quite competitive in the PC multimedia space, nothing is even remotely close to what they are showing off at this year's CES.

At the show ATI is demonstrating the world's first and only CableCard HDTV tuner for PCs, and we were fortunate enough to get a hands-on demo of it.

Currently called ATI's OCUR (Open Cable Uni-directional Receiver), the CableCard tuner is presently only a technology demo, with the final product shipping alongside Windows Vista sometime in 2006 (Microsoft is officially saying "Holiday Season 2006"). Despite the early nature of the product, the reference design is done and simply waiting for Microsoft to ship their OS.

The first versions of the OCUR will be provided exclusively to OEMs and not for retail sale, but ATI will eventually release a product directly to consumers. ATI is currently the only manufacturer to have a ready and certified reference design, and they do say that it is possible that they will be the only one at launch.

Windows Vista with CableCard support - running on a laptop

Currently there are two versions of the OCUR design, one external and one internal, but both offer the same functionality. The external box is obviously no where near polished, but the internals of the design are complete.

The way it works is simple: you connect a coaxial cable to the front of the OCUR, plug in your CableCard and run a USB cable from the back of the unit to your Windows Vista PC. To your PC, it appears to be nothing more than a regular tuner, except that it can now tune all channels - analog channels as well as premium HD content. Note that the tuner only supports CableCard 1.0, but with Vista you'll have your own EPG (Electronic Programming Guide) so you really only lose out on on-demand and pay-per-view functionality. The pros definitely outweigh the cons though, as you'll be able to finally have a PC based HD-DVR.

The internal version of ATI's OCUR

It's worth noting that both the internal and external versions use USB 2.0 to interface to your PC. The internal version will either have an external USB port you can connect (externally) to your PC, or it will have an internal connection that you can run to your motherboard's 4-pin USB header. The output of the tuner is at maximum a 19.2Mbps signal, so USB 2.0 is more than enough to carry it.

You'll also notice an Ethernet port at the back of the box we were shown, however that won't be in the final design. ATI will eventually bring a design to market that will work over Ethernet and not just USB. An Ethernet design could potentially mean that the tuner wouldn't be tied to a single PC but accessible by any PC on the same network (obviously only one machine could access it at a time).

Inside the tuner are two pieces of ATI silicon - a Theater 550 and a NXT 2003, the combination of which handle all of the tuning and demodulation on the device. There is a FPGA in the device that along with some other custom silicon handles all decryption from the original broadcasted signal as well as encryption before handing the content off to the USB controller for transmission to the PC.

Index OCUR in Action


View All Comments

  • Venomous - Thursday, January 5, 2006 - link

    Ok, so we get cablecard support. Why is it, everyone keeps forgetting about Satellite people? Its a cold day in hell when i submit to the ripoff programming of cable companies in my area. Ill be impressed when SATV owners are included. Reply
  • Yianaki - Thursday, January 5, 2006 - link

    I bought XP the day it came out and unlike 9x I was extremely happy with the stability and it all around. I do not know if I want to deal with Vista's bloat on any of my boxes. Am I to believe that no one will be coming out with HDTV cable card support in MCE 2005 in the future? I can't say I am nervously waiting for Vista to suck up 512 megs of my memory. I have XP tweaked to 140 MB on loadup and XP suits me fine for the forseable future. Reply
  • Dismal - Thursday, January 5, 2006 - link

    So this card can tune HD and digital channels? I'm a newbie in the tuner world but thought that without connecting your existing cable box to your tuner, you could only tune into analog channels with these cards. Reply
  • SynthDude2001 - Thursday, January 5, 2006 - link

    Yes, that's the whole point of Cable Cards. They can do the decryption that a cable box can, with some limitations as mentioned in the article.

    Personally I think the idea is cool (though it'll likely be dragged down by DRM as others have said), but I don't really have any interest in paying for premium HDTV channels when I can already get the national networks in HD just fine over the air or cable.
  • Dismal - Thursday, January 5, 2006 - link

    Ahh, I understand. Thanks for the replies guys. Reply
  • Furen - Thursday, January 5, 2006 - link

    I think that's what the Cablecard slot is for, to allow you to decode the encoded crap your cable provider sends you. Reply
  • AlexWade - Thursday, January 5, 2006 - link

    Just curious, but is it possible that this device will work for Linux instead? Reply
  • Doormat - Thursday, January 5, 2006 - link

    Snowball's chance in hell. DRM is the name of the game here.

    It is possible however, that there would be Mac drivers, allowing the Mac Mini to act like a PVR utilizing Front Row.
  • Xenoterranos - Thursday, January 5, 2006 - link

    Well, if there is a MAC driver, then you're only a step away from a serviceable *nix driver for any x86 PC now that MAC's are using intel processors. Reply
  • DigitalFreak - Thursday, January 5, 2006 - link

    I'm betting we'll see a lot similar products from Taiwan and South Korea that will work just fine without all the DRM crap. I'd much rather see a 1394 interface though, since connecting multiple ones to your PC is going to drive up the CPU utilization over USB. Reply

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