Re: ISDB caption support

[David Liontooth <lionteeth@cogweb.net>]

Hi Devin,

Great, thanks.

I realize captions is an application-layer function, and intend to work 
with the CCExtractor team. Do any other applications already have ISDB 
caption support?

For DVB and ATSC there's quite a bit of code written by several people 
for teletext and captions -- has anything at all been done for ISDB 
captions?

It's used in nearly all of Central and South America, plus the 
Philippines and of course Japan -- you would have thought someone has 
started on the task?

We're looking for a good solution for capturing television in Brazil, 
when the signal is encrypted -- are there set-top boxes or tv capture 
cards that handle the decryption so that the decoded signal is passed on 
with the ISDB-Tb caption stream intact?

Our test system generates captions as an overlay and does not pass on 
the closed captions.

Cheers,
David


On 11/28/14, 6:40 PM, Devin Heitmueller wrote:
> Hi David,
>
> ISDB-T subtitles are done in a similar manner to DVB-T subtitles -
> there is a PID in the stream which contains the subtitle data, which
> needs to be decoded by the application (just as you would handle DVB-T
> subtitles or ATSC closed captions).  It's entirely an application
> level function, having nothing to do with the driver layer.
>
> In short, this has nothing to do with DVBv5, as that is all about how
> the tuner is controlled, not what gets done with the resulting MPEG
> stream.  You would need to talk to whoever is responsible for the
> application you are working with (whether that be VLC, mplayer,
> ccextractor, etc).
>
> Cheers,
>
> Devin
>
> On Fri, Nov 28, 2014 at 2:55 PM, David Liontooth <lionteeth@cogweb.net> wrote:
>> What is the status of ISDB-Tb / ISDB-T International / ISDB Japanese closed
>> captioning support?
>>
>> If anyone is working on this, please get in touch -- we're particularly
>> interested in getting Brazilian SBTVD working.
>>
>> I see Mauro has been working on DVBv5 support, but does this include
>> captioning?
>>
>> Cheers,
>> David
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>