Patent ID: 8631433

Claim:
A method for operating an apparatus for providing an image on a display, the method comprising: (a) receiving a signal for a corresponding channel at an input of the apparatus, the received signal including program information and one of first type of information and second type of information, the first type of information including a video information and the second type of information consisting essentially of at least one of an audio information, a data information or a scrambled information; (b) providing (i) a first thumbnail image based on the video information when the received signal includes the first type of information or (ii) a second thumbnail image based on program information included in the received signal when the received signal includes the second type of information; (c) providing a thumbnail list having a plurality of thumbnail images for a plurality of channels based on (a) the receiving of the signal and (b) the providing of the first thumbnail image or the second thumbnail image, a thumbnail image for the thumbnail list being one of the first thumbnail image and the second thumbnail image; (d) when a thumbnail image corresponding to a scrambled channel in the thumbnail list is selected, de scrambling a video signal of the scrambled channel; and (e) displaying the broadcast image corresponding to the descrambled video signal of the scrambled channel, wherein when the thumbnail image corresponding to the scrambled channel in the thumbnail list is displayed, the thumbnail image corresponding to the scrambled channel includes the scrambled information rather than the video signal of the scrambled channel, wherein the providing of the first thumbnail image or the second thumbnail image comprises: demultiplexing an input stream corresponding to a channel, determining whether or not a broadcast signal of the channel is scrambled, when the broadcast signal of the channel is determined to be scrambled, extracting the program information from the demultiplexed stream, generating the second thumbnail image based on the program information, and multiplexing the generated second thumbnail image, when the broadcast signal of the channel is determined to not be scrambled, extracting the video information from the demultiplexed stream, generating the first thumbnail image based on the video information, and multiplexing the generated first thumbnail image, demultiplexing the multiplexed stream, and extracting the first thumbnail image or the second thumbnail image based on the multiplexed stream, wherein the providing of the first thumbnail image or the second thumbnail image further comprises determining errors in the extracted first thumbnail image or the second thumbnail image, wherein when there is determined to be no error, the first thumbnail image or the second thumbnail image in the thumbnail list is displayed, and wherein when there is determined to be an error, the first thumbnail image or the second thumbnail image in the thumbnail list is removed.