XPost: comp.dsp, sci.crypt, sci.electronics.design   
   From: OneBigLever@InfiniteSeries.Org   
      
   On Fri, 18 Dec 2009 10:50:36 -0500, "Michael A. Terrell"   
    wrote:   
      
   >   
   >glen herrmannsfeldt wrote:   
   >>   
   >> In comp.dsp Michael A. Terrell  wrote:   
   >> (snip)   
   >>   
   >> >   Videocipher-I was digital video & audio.  Videocipher-II was analog.   
   >>   
   >> And then there was the system that adds a sine wave to the   
   >> video signal such that the sync is not the lowest level anymore,   
   >> and wonders around enough that you won't try watch it.   
   >   
   >   
   >   
   >  That was 'On TV' or the 'Hamlin' scrambling system on Cable TV. That   
   >was '70s technology.   
      
      
    It was called "In band gated sync scrambling".   
      
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