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A FYI for this thread is Rovi was created when Gemstar TV Guide International let Macrovision buy them and then they changed their name to Rovi. Eventually Rovi acquired TiVo and then took on the TiVo name. They recently merged with Xperi which owns DTS audio.

Gemstar created and owns the rights to TVGOS and the iGuide which is used in a lot of cable company set top boxes. They acquired PassPort Echo back in 2005 and that is also used by a number of cable systems in the US. They also owned the original TV Guide magazine which was sold weekly at most supermarkets. They also created and owns the rights to the VCR plus codes. They also own the massive TV Guide database which dates back to the 1950's. The database was used for the magazine and then they started to use it digitally in the 1990''s when the started to embed TV Guide On Screen in high end televisions starting in 1997. I had a number of TVs that had the guide embedded and I currently have to 8 gen Kuros that have version 9 of TVGOS. Also the Sony DHG used the guide when they released their DVR in 2004. The TVGOS service was ended in the spring of 2013.
 
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