[mythtv-users] The state of ATSC closed captioning

[Michael T. Dean]

On 03/17/2009 01:55 PM, Phil Bridges wrote:
> 2009/3/17 Marco Nelissen marco.nelissen:
>   
>> On Tue, Mar 17, 2009 at 8:53 AM, Phil Bridges wrote:
>>     
>>> 2009/3/17 Marco Nelissen marco.nelissen@:
>>>       
>>>>> On Mon, Dec 1, 2008 at 8:48 PM, Yeechang Lee <ylee at pobox.com> wrote:
>>>>>           
>>>>>> Turn off "Prefer EIA-708 over EIA-608 captions" to use VBI captions
>>>>>> instead, which work, and work quite well.
>>>> I have turned off this option, but CCs are still broken in the same way
>>>> (CCs
>>>> printed on top of each other). I am using 0.21-fixes.
>>>>         
>>> During playback, are you selecting the ATSC captions, or the VBI captions?
>>>       
>> Unless I'm missing something, ATSC captions are the only ones available
>> (i.e. the menu only shows 'Select ATSC CC', and the only options in the
>> submenu for that are 'Toggle On/Off' and 'ATSC CC 1: English')
>>     
> Interesting - all the ATSC programs I've watched have options for both
> ATSC and VBI - at the resolutions I run, the VBI option is on the next
> "page".

Currently, FCC rules state that both EIA-608 (VBI captions) and EIA-708 
(ATSC captions) must be sent on ATSC transmissions for all nonexempt 
captioned programming.  I'm pretty certain this also applies to cable 
rebroadcasters, too, but only for unencrypted content.  However, some 
equipment may (unintentionally, even) "strip out" or corrupt VBI CC (so 
to speak).

Mike