XPost: sci.electronics.components, sci.electronics.design, sci.e   
   ectronics.equipment   
   XPost: sci.electronics.repair   
   From: excretatauris@invalid.invalid   
      
   On Mon, 11 Feb 2013 18:19:31 +0000, Ian Field wrote:   
      
   > PAL may have given the Jap designers a bit more trouble - some of the   
   > early loss-leader sets had 2 colour subcarrier crystals - they had some   
   > pretty strange looking circuitry where the 7.8kHz ident oscillator should   
   > have been.   
      
   Some, if not all, of that was to get around the Bruch PAL patent.   
   Supposedly, not using the swinging burst for phase ident got them out of   
   paying Telefunken royalties.   
      
   Early on, Tfunk would not license manufacturers in countries that didn't   
   themselves operate the PAL system.   
      
   Sony used the 4-field alternating blanking cycle, that was a PAL   
   afterthought to get rid of top disturbances, and reputedly wasn't   
   patented. That system effectively threw away alternate line chroma,   
   reusing the previous line.   
      
   --   
   "For a successful technology, reality must take precedence   
   over public relations, for nature cannot be fooled."   
                                          (Richard Feynman)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)