HDMI Does Not Work for Captioning
Banjo's World has a captioned vlog about the problems with HDMI and captioning. Even though Banjo explains it in layman's terms, I don't fully understand it. However, the bottom line is clear - if you are deaf and buy a HDTV, the captions may not work! Of course this is not fair, and given that analog television is going away completely by February 2009, it is even more unfair! (I have yet to buy a HDTV myself. You better believe that if the captions don't work after I buy a HDTV, I'm going to give certain companies and federal agencies hell).
12 Comments:
Thanks for blogging on my vlog. :-)
Well, the problem with HDMI cable is that when the engineers designed it, they overlooked or ignored the importance of adding a channel for CC signal to go through.
HDMI carries video and audio. The video signal cannot carry the CC signal on HDMI, so a separate channel would be needed to carry it. It would require very, very tiny amount of data to go through. HDMI cables can carry quite a massive amount of data all at once. So why not a few bytes for the CC?
Hmm!
Again, thanks for blogging on this. I hope more people will!
Oddly, I just set up my nu LCD TV with HDMI cable from my Comcast cable box. Cable box captioning had been set to ON, and those captions come thru the HDMI just fine.
Q: BUT: I've lost the captions that comes on DVDs. Those captions had showed just fine when I'd connected my plain-old DVD player by composite cables to my old analog TV. The same DVD player is now connected to the LCD TV with composite cables. Could it be that composite cables don't carry captions? If so, would S-video cable be better for this important purpose ?
Oddly, I just set up my nu LCD TV with HDMI cable from my Comcast cable box. Cable box captioning had been set to ON, and those captions come thru the HDMI just fine.
Q: BUT: I've lost the captions that comes on DVDs. Those captions had showed just fine when I'd connected my plain-old DVD player by composite cables to my old analog TV. The same DVD player is now connected to the LCD TV with composite cables. Could it be that composite cables don't carry captions? If so, would S-video cable be better for this important purpose ?
Sorry. Dumb me.
To view subtitles, the DVD player had to be reset; it had been unplugged. It needs to be reset for every DVD.
alowin@earthlink.net said...
"Oddly, I just set up my nu LCD TV with HDMI cable from my Comcast cable box. Cable box captioning had been set to ON, and those captions come thru the HDMI just fine."
That's because your cable box is doing the rendering and overlaying it onto the video rather than sending the CC signal through the HDMI cable.
Hope this explains why you can see CC from your cable box.
Thank you for this blog...
I have seen many sites before and most of them do not look this good.
Regards,
SBL – Video audio tagging
Compostie and Compoment cables allows CC to pass through. NOT S-VIDEO... And now I'm appalled to find out that HDMI has the same problem. Grr...
There's info on this in WIKI on CC. Scroll down to DVD section and it briefly explains what Banjo explains...
http://en.wikipedia.org/wiki/Closed_captioning
I am so tired of having to fight for deaf/HOH rights. If you ask me, this is a discriminatory action to have us go through this kind of problem. The government should standardize captioning not just on tv sets, but all cable & satellite tv will have to make it readily available, and explain to all how to do this (send out a notice to all viewers). If you are not deaf, you may know someone who is. If they are at your home and cannot view the captioning on the TV, then the commercials will not be seen by 10% or more of the population who depend on captioning to view media. That's a large amount of people. That might make them think about it.
I've gotten a few websites to list whether or not movies were closed-captioned just by writing to them, and also some movie companies. It worked so something can be done. Write to your senator or congressman.
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DTV Help Center
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Hello everyone! My name is Tyler If you have a problem with closed Captioning contract us. We will help you fixing on Closed Captioning. Thank you.
About the only thing the HDMI consortium got right was locking the consumer out of their precious signal path. This is supposedly to protect the 'integrity' (eg. ensuring the consumer can't do anything to it they don't approve, such as overlaying useful OSD data, etc.)
Aside from not planning well for 'user data' like ability to display CC, there are hmany other problems with HDMI.
I'd personally recommend using component cables, and give any provider cutting the resolution on the analog ports serious hell!
It seems that HDMI's best (and only) real feature is to take control of your TV out of your hands through all the strong HDCP encryption.
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