High Def Forum
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How are HD signals packaged for broadcast?

04-20-2012, 05:13 PM

I'm new here, but it seems like the right place to find some answers about how digital TV signals work. What I mean is, how are the audio, video, and subtitle streams bundled together and sent over the airwaves.

In the world of online video streaming, mp4, ogg, or webm containers are used, but I have no idea how those Web technologies compare to how a digital signal is broadcast, and more importantly, consumed.

The bottom line here is that I'm wanting to know if it would be possible for software running on a smart TV to get access to the subtitles of an HDTV signal, assuming the hardware would support it.

04-20-2012, 08:27 PM
I used to have an analog ATI tuner card that could make a transcript file of the closed captions. If that is what you are looking for, then it is possible if the tuner hardware or card would support it.