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PostPosted: Thu Oct 26, 2006 10:08 am 
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One of the things they said was possible lack of demand. I'm not sure how people can demand a card that doesn't work in their OS, but I've made a poll to gauge interest in the card: http://mysettopbox.tv/phpBB2/viewtopic. ... 2213#72213

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PostPosted: Thu Oct 26, 2006 2:19 pm 
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Location: USA, New Hampshire
I am in there on this one. However, I would only want it if it worked with comcast though. Can you bypass the problem child with the media converter.

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PostPosted: Thu Oct 26, 2006 2:26 pm 
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wanttoknow wrote:
I am in there on this one. However, I would only want it if it worked with comcast though. Can you bypass the problem child with the media converter.

That's the big IF at this point. They have said that the card requires an HDCP-compliant source. So the question is whether or not a converter box from a non-HDCP compliant source could produce HDCP-compliant output that spoke HDCP to the card and said, "It's ok to copy me."

I'm not a lawyer, but it also needs to be determined if this would be construed as circumventing the media's copy protection. Technically, Comcast's STB is already circumventing it for you if it sends you S/PDIF audio and unprotected component/DVI video, so nothing in the process would actually be removing content protection.

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PostPosted: Fri Oct 27, 2006 7:22 am 
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wasn't there something in the lines that uncompressed ts stream is abnormally large, in other words what kind of storage would be needed to store the streams.

I wouldn't see this as circumventing the HDCP, as Comcast is outputting the stream via DVI out unencrypted, correct? Would this card be able to just capture the stream via that method? Is there actually HDCP code going through that as well?

Hopefully this would turn out good for us!!

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PostPosted: Fri Oct 27, 2006 8:19 am 
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I know that HD streams take up alot of space regardless of what device is bringing them in. You'd think the Air2PC cards and other HD OTAs would give you a larger file than a set-top box due to compression on the far end.

Comcast (now Time Warner) in my area has no DVI. They do have HDMI and component as well as firewire, which I use when it wants to work. The HD streams are large but transcode can smash them down and there are known hacks to get them re-encoded to h264.

I don't think the current streams are all that large. They won't take any kind of fancy raid arrays to record. You would think that Firewire would give you a ton of data and that'd be the benchmark but we'll see.


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PostPosted: Fri Oct 27, 2006 9:33 am 
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wanttoknow wrote:
wasn't there something in the lines that uncompressed ts stream is abnormally large, in other words what kind of storage would be needed to store the streams.

Yeah, if nothing steps in to do compression, if my math is right, 1080i would fill an average HDD up in about an hour...

1920x1080 pixels at 24bpp (bits per pixel) = 49,766,400 bits
x 30 fps (frames per second) = 1,492,992,000 bits
x 0.5 for interlaced (someone check me on this, please) = 746,496,000 bits per second
/ 1,048,576 bits per megabit = 711.914 Mbps
/ 8 bits per byte = 88.989 MBps
x 3600 seconds in an hour = 320,361.33 MB/hr
/ 1024 Megabytes per Gigabyte = 312.85 GB/hr

wanttoknow wrote:
I wouldn't see this as circumventing the HDCP, as Comcast is outputting the stream via DVI out unencrypted, correct?

Yes, for some STBs. (Although in the case of Comcast, their DVI implementation may have been intentionally broken to drive more people to HDMI.)
wanttoknow wrote:
Would this card be able to just capture the stream via that method? Is there actually HDCP code going through that as well?

No. The way this would work would be via a converter that takes DVI and S/PDIF audio and converts it to HDCP-compliant HDMI, such as this device: https://www.audioauthority.com/indexh.p ... Product=16

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