Confirm please: HD-PVR records Closed Captions (CC)

[Eckwell]

Can anyone confirm that the recordings the HD-PVR records include Closed Captioning information?

Thank you.

[TechBill]

I wanted to know the same thing but I think what will likely happen is that the current HDTV the STB does the decoding so the CC is likely going to be recorded and burn into the video since HD-PVR is recording everything that come out of compoment.

On the bright side that will be fine with me and it will allow me to stream shows with Closed Caption already burnt into the video to other player or over internet not needing to worry about finding a player that could decode it but there are still issue with HDTV and CC like DirectTV HD STB still got delay issues in their HDTV CC which come up like 10 second later after they said it. I notice on the internet that most cable companies HDTV STB are having CC issue as well too.

But I still would like to hear from anyone who have experiement with CC and HD-PVR


Bill

[Eckwell]

Techbill...

I agree that the CC will most likely come through pre-decoded by STB. That should work for me too. I have the HD-PVR sitting in the box waiting for me to find time. It might be a late night tonight!

First step, as always, image my drive!

Anyone else out there with a CC story?

[phelme]

I'm bumping this thread.

I've never been able to get CC'ing out of the HD-PVR. It's coming from a DirecTV STB so I know the data is there. I notice that Comskip (donators) hasn't had any luck generating .smi's with content out of my HD-PVR .ts files either.

Has anyone had any luck with it?

[phelme]

FYI. Just found this in the Hauppauge FAQ

Does the captured transport stream contain closed caption data?

No, currently none of the VBI is captured in the stream. This feature will be added some time in the future.

(http://www.hauppauge.com/site/suppor...ort_hdpvr.html)

so I guess I've answered my own question.

[bcjenkins]

I wouldn't expect it to capture the data of a stream, but I would expect that it capture the raw video output which would have the decoded stream in the signal. Is that not the case?

B

[sic0048]

I guess closed caption doesn't work like that. It sounds like the CC is simply an extra data stream in the broadcast that the TV actually decodes and displays on the screen. So the STB isn't actually decoding the CC signals and making them appear on the screen - it's the TVs that do that. Therefore the output from the STB does not actually show the CC on the screen even if you have it selected on the TV.

If the HD-PVR cannot capture that extra CC data stream, then there is no data for the final display device to decode and display on the screen.

[jerryt]

I have CC with Dishnet VIP211 and HD-PVR.

The STB is set to display captions and the HD-PVR just records the captions as video.

[phelme]

Originally Posted by jerryt

I have CC with Dishnet VIP211 and HD-PVR.

The STB is set to display captions and the HD-PVR just records the captions as video.

so you have captions all the time and cannot "turn them off"?

[jerryt]

Originally Posted by phelme

so you have captions all the time and cannot "turn them off"?

I can turn them off on the STB for the next recordings.

But the shows already recorded have the captions burnt to the video, where they can not be separated.

Think of it as video taping a movie in a theatre with captions.

[phelme]

Heh, that's an option I guess.

So are there specific shows your manually engage the STB CC for? I could see doing that for certain BBC America shows.

[SHS]

There is no way to control Closed Captions/Subtitles with this product.

AFAIK there is no standard to transmit CC information over 480i/720p/1080i,p interconnects and that is why you will not seeing CC information.

The CC transmission AFAIK is just for NTSC compatible analog signals only and is sent over line21 VBI vertical blanking interval. The equivalent for this doesn't exist for 480i/720p/1080i,p interconnects.

By interconnect I mean the connection between your source (DVD player, HD tuner, STB, etc.) and your display. Interconnects are normally setup as Component or HDMI/DVI.

The solution for this for was to encode the CC information into the mpeg/x264 stream itself but this has the side effect that only the device that decodes the mpeg/x264 stream (in all case the DVD player or STB receiver) has access to the CC information. Once the mpeg/x264 stream is decoded and then needs to be transmitted to the display using Component or HDMI/DVI there is no way to transmit it (ie there is no standard for the CC transmission over Component/HDMI/DVI) Thus if there is CC information the source device needs to overlay that CC info on the picture prior to transmitting to the display over the interconnect.

This is what it boil down to if CC information exists, the stb receiver will need to be responsible for overlaying that CC info you want to see on to that output to 480i/720p/1080i,p input so end of story.
Usely this done by MTS decoder in the TV set and then added on top of the video.

I think but not 100% sure on this but I think of only two way a round this.
1: Re-embeded CC info back in to line21 VBI vertical blanking interval and pass on to output, this not going to happing any time soon the cable and sat stb receiver need support this good luck with that one.

2: Pull the CC info from Composite/SVideo output then encode the CC information into the mpeg/x264 stream itself or dump cc file.