[opendtv] Re: Format Independence
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 10 Nov 2005 08:45:42 -0500
At 1:44 AM -0800 11/10/05, Ron Economos wrote:
>Also at the MPEG-2 encoder end. Most (if not all) encoders need
>to be restarted when switching formats.
>
>Some encoders can switch 1080i horizontal resolution on the fly
>(between 1920, 1440 or 1280 wide). However, it's another
>decoder compatibility issue as to how seamless the resolution
>switch is.
>
Exactly. The only transparent way to change formats on the fly is to
open up a new PID, before the old one expires, and use a second
decoder in the receiver to start up the decoding process; the display
processor can then either switch or transition between
streams/decoders, depending on it's inter-format conversion
capabilities.
Regards
Craig
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