A decoder for use in a television system. The decoder includes a receiver for receiving a television signal having at least one channel. Each channel of the television signal includes video and audio components. A channel maps the channel received by the receiver to a plurality of virtual channels. A...http://www.google.com/patents/US5200823?utm_source=gb-gplus-sharePatent US5200823 - Virtual channels for a multiplexed analog component (MAC) television system
