[opendtv] Re: New Sony COO bullish on Blu-ray
- From: Ron Economos <k6mpg@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 14 May 2006 04:11:56 -0700
All true, but don't forget, it's a also a recording interface
(for which HDMI is not capable).
Ron
Kilroy Hughes wrote:
>1394 output from cable settop boxes never made any sense anyway.
>It was limited to compressed bandwidth for SD video, and it's still
>limited to compressed bandwidth for HD video. A compressed display
>connection is a non-starter in many ways.
>
>One reason is that most of the "value add" of cable (and satellite)
>services, like EPGs, PVR, VOD, VOIP, email, etc. are not provided in the
>MPEG transport streams relayed from broadcast networks. They are
>uncompressed video/graphics rendered in the settop box. =20
>
>You could always add a realtime MPEG-2 MP@HL encoder and 1394 on the
>output of each settop box to take advantage of the piddling percentage
>of "digital" displays with ATSC tuner/decoders, but then you're limited
>to some arbitrary subset of image formats that might decode properly
>rather than an MPEG compliant decoder, and it would cost more than the
>STB and make ugly pictures worse. But, other than being a bad idea both
>technically and from a business perspective, and obsolete before it's
>deployed ... it's a great idea.
>
>The best solution is for settop boxes to output uncompressed, and these
>days that means HDMI because of content protection. Displays with HDMI
>input will remain useful long after various broadcast modulation and
>encoding schemes are dead and gone (and same for audio).
>
>The current challenge with uncompressed connections is to do a good job
>with the bulk of movies and dramatic TV shot at 24 frames per second and
>turn that back into 1080P in today's displays, which are progressive in
>nature (DLP, plasma, LCD, LCOS, SED, etc.). Raster scan displays are
>becoming an historical footnote for consumer HD displays, but live on as
>1080i30 signal format delivering an unknown mix of 24P and 30i to the
>progressive display system. When displays throw away the repeat fields
>and leave the 24P images alone, 1080P24 (with whatever display update
>rate) looks great. Unfortunately, the images processors often
>"deinterlace" resample, filter, and even scale up and crop (to simulate
>the bezel of a cathode ray tube ... how stupid is that?). The result
>looks like twitter filtered 1080i, or worse. =20
>
>Kilroy Hughes
>
>
>
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