A game console capable of communicating with other game consoles over a link or network is provided with a headphone and microphone for each player who will engage in voice communication. Verbal communications directed to one or more other players are converted to pulse code modulated (PCM) digital data...http://www.google.de/patents/US20030216178?utm_source=gb-gplus-sharePatent US20030216178 - Use of multiple player real-time voice communications on a gaming device
