Originally Posted by sfhub
According to a TVGOS tech the conversion happens as part of standard line21 conversion which includes CC, ratings, etc. These are supposed to survive the digital transition and are reinserted into the analog signal output from the boxes. There is no special recognition of TVGOS on line21, all the data transmitted for line21 is just blindly reinserted. According to TVGOS tech, they tested this on the RCA CECB and it worked fine and expected others to work as well.
I haven't read that closely about DTV-PAL to see if they are doing anything beyond what the RCA unit is doing. As you said, actually decoding and using the TVGOS data would require DTV-PAL to license the system and add to costs, so they wouldn't be doing that for an entry level CECB product.
There's nothing around to read about the DTVPal so far that will tell you exactly what they are doing...one thing is that to set up an ANALOG TV Guide device so it will operate with the TVGOS data sent to it, you have to set up the device with a fake zip code instead of your actual one so that it picks out a set of data that uses just analog style channel numbers (and not digital-style 2-part channel numbers). The table of fake zip codes in the DTVPal manual has one for each metro area, e.g., 00001 for NYC, 00005 for San Fran area. Personally, I think this means the corresponding TVGOS data set is broadcast with the standard TVGOS data set in each zip code....but that's just my opinion.
With regard to your comments about line 21, I got the impression some months ago that, while cc is on line 21, TVGOS is on another - line 15 is currently being discussed in the thread for the LG3410a - and that the point was that a chip that converts line 21 could just as easily convert the batch of lines that has 21 (as well as the others, like 15)...which would reconcile the facts that you're discussing 21 and THEY are discussing looking directly at line 15 in the DTVPal output (though none of them have gotten their hands on a unit yet)...cf http://www.avsforum.com/avs-vb/showt...1#post14205361
I hope I'm representing what you and they said correctly, and that perhaps you can comment...
thanks - Tony