Thread Subject: Re: thoughts from another discussion (related)
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From: Larry Goldberg
Date: Thu, Feb 08 2007 10:19 AM
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Not quite - the DVD players need to reconstitute the caption data that was
written onto the disks in the video user bits and encode it onto line 21 for
transmission to and decoding by the displays' caption decoding circuitry.
The original (1st gen) DVD players were not able to do this but later models
fixed that design flaw.
Now we are facing the same situation with BluRay and HD-DVD - the hardware
cannot "sense" nor reconstitute caption data for transfer to the HD display
and the high-end connections make this impossible too. So the DVD would need
to decode the captions to make this work - like cable set-top boxes and
other HD receivers that are external to the display.
- Larry
David Poehlman wrote:
> Greg, DVD players have nothing to do with capttions, it's the dvds
> themselvs which have or do not have them. If they are available, dvd
> players will honor them if asked.
>
> On Feb 7, 2007, at 4:17 PM, Gregg Vanderheiden wrote:
>
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>>> /This article states that most DVD players don't support closed
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>>> captions.
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>> Ugh.
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>> On a similar note, I learned this morning that the strict
>> definition of
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>> "podcast" doesn't allow video files to be captioned. From what I
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>> understand, if a QuickTime file includes a text track (which is how
>> you
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>> include captions for this format), then it can't be downloaded via
>
>> iTunes or played on an iPod...
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> Gregg
>
> ------------------------
>
> Gregg C Vanderheiden Ph.D.
> Professor - Depts of Ind. Engr. & BioMed Engr.
> Director - Trace R & D Center
> University of Wisconsin-Madison
> < <http://trace.wisc.edu/> http://trace.wisc.edu/> FAX 608/262-8848
>
> DSS Player at http://tinyurl.com/dho6b
>
> <http://trace.wisc.edu:8080/mailman/listinfo/>
>
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