Lots More Information Prev Next Related HowStuffWorks Articles Top Ten TVsHow HDTV WorksHow Television WorksHow Digital Television WorksHow Cable Television WorksHow Satellite Television WorksHow the ESRB WorksWhat do movie ratings mean, and who applies them?What do video game ratings mean?Do violent video games lead to real violence? More Great Links V-Chip Homepage - from the FCCPatent 4,554,584: Video and audio blanking system - A key V-chip patentPatent 5,828,402: Method and apparatus for selectively blocking audio and video signalsFCC DocketWhat do movie ratings mean and who applies them?