document: 8 September 2016 Last updated at 02:42 BST
  When the PS4 Pro is released in November, it will be the first time the Japanese firm has had two consoles on sale with significantly different graphics capabilities within the same generation.
  The head of PlayStation Europe, Jim Ryan, told the BBC's Michelle Fleury that the move was designed to future-proof the PlayStation 4.
summary: Sony has announced a more powerful version of its PlayStation 4 console at an event in New York.