|Originally posted by PVR
The technology is here to be able to do
HDTV PVRs but the content and potential customers
don't yet justify the expense to market such
a beast. We _will_ see HD PVRs in the next
couple of years as there is more content and
more people aware of the benefits of HDTV
(and cheaper displays).
There's certainly exactly as much reason and market for HD PVR as there is for HD VCRs, and two of those have just shipped (I saw the Mitsubishi at a Tweeter in "Baja" La Jolla (the UTC, across Genesee from Westfield Mall :)) today.
|The HiPix stores all of the program stream
regardless of how much "padding" exists in
the ATSC packets. So the recordings take
about 8gb/hr even if they are NTSC upconverts
letterboxed with 4:3. The 19.3MBit/sec
spec is "fixed"... They don't reduce it or
increase it for different programs.
I'm aware of that. You don't need to store the ATSC packets--just demux the program being recorded out of the MPEG-2 TS into a more compact elementary MPEG-2 stream and store that. I'm quite certain that the HD D-VHS VCRs do exactly that. Tom Barry has stated elsewhere
that there are programs readily available for doing this that can reduce HiPix recordings anywhere from 10-30%. Of course, they produce MPEG files that can no longer be played through the HiPix card with its software, but that's a minor technicality :). The MPEG streams would be as playable through 1394 video equipment as HD prerecorded tape or DVD would be, which wouldn't contain any of that trash either.
DTCP compliant devices would probably store any DTCP_descriptor packets, and remux the playback stream to contain these, since they encapsulate copy-protection information to make it easily picked out and interpreted by non-MPEG-decoding devices. (CGMS flags can be present in the MPEG data itself, but you have to decode it to see them).
-- Mike Scott