Patent ID: 8453181

Claim:
In a video processing apparatus having at least two video inputs, each video input able to receive a video signal originating from a respective one of a plurality of different external input sources including cable and antenna video signal sources and coupled to a display device, a method of performing a channel search comprising: utilizing information generated from a previous full channel search regarding whether a previously selected video input is coupled to one of said cable and antenna video signal sources in order to skip one of cable and air channel detection routines that has been performed in conjunction with said previously selected video input; selecting manually on a screen of a GUI by a user a video input as a currently selected video input exclusively from one of said at least two video inputs, wherein said at least two video inputs are receiving different video signals from respective ones of said plurality of different external input sources; determining by said video processing apparatus if said video signal received on said currently selected video input is at least one of a certain type of video signal and said video signal received on said currently selected video input originates from a certain type of video source; detecting available channels from various possible channels received from the video source connected to only said currently selected video input when said received video signal is at least one of said certain type of video signal and originates from said certain type of video source; and updating a channel list of all channels available for said currently selected video input.