gary sheppard wrote:
On 4/19/07, *James Richard Tyrer* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Timothy Normand Miller wrote:
Is that what you really want? A video decoder? Not a graphics
card?
The current situation is that a user must purchase a high end video
card suitable for serious game or 3D CAD usage to get h.264 HiP
1080p/30. A market niche, therefore, exists for a video card that
*can* decode video and which provides basic 2D & 3D acceleration for
normal GUI based apps. If we build a card based on a set-top box
chip/media processor chip, this is what we will have -- video decode
with basic graphics.
If you want a graphics card, I think what you'll need is some
combination of a processing element (some processor) and a small
FPGA
to send the video data. Most likely, you'll want a DSP with a bus
on it for memory, not a built-in memory controller, because we'd
most likely want to do the memory through the FPGA so that we have
enough
bandwidth for video.
IIRC, some DSPs allow external access to the memory bus or we could
use the DSP's DMA controllers to output the video data.
Minimize, minimize, minimize.
Yes, HDMI and either VGA or DVI should do it. I suggest an add on
board for separate audio output. Note that HDMI to DVI + PSDMI boxes
do exist.
-- JRT
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--- what about the Cell Broadband Engine Family? IBM wants folks to
sign on pretty badly.
Yes, a Cell Processor is a possibility. I don't know about price and
availability.
It may simplify getting the "processing power/bandwidth" needed. I
doubt it would make the design overly easy. --- As far as audio, i
hear Dolby has some sweetheart incentives going to get better PC
market penetration.
We would probably be using an existing chip so this probably wouldn't
make a large difference.
--- Display Port just recently was upgraded. I hear they may even
support Optical connections. --- There probably will be a market for
H.264 and MPEG 4. Basicly you would be trying to enter the home
entertainment pc market. With basic video card functions. ---
People do play DVD movies on their computers.
Probably better think about DRM legalities.
This is something which I have considered. Vista uses DRM based on
system software. Some of it has already been cracked. This probably
hasn't pleased the relevant DRM groups. I think that it would be
possible for us to make a system where software could NOT disable
encryption. DRM questions would be handled by an independent OTP MCU
soldered and potted to the board and not using any surface traces for
control signals. IIUC, this would meet the requirements of the license
agreement. This would be much more secure than Vista and I would hope
that it would make the DRM groups very happy since the integrity of
encryption would not be dependent on a software driver.
--
JRT
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