Patent ID: 7720600

Claim:
A navigation system, comprising: means for receiving a broadcast signal having a content stream, comprising digital audio signal and digital video signal, including a commercial message, and an associated data stream; means for displaying the digital video signal and playing the digital audio signal in the content stream in real-time; means for determining whether the associated data stream contains a first keyword that matches a second keyword from a stored list of keywords that respectively correspond to businesses, such that a given business corresponding to the matched second keyword is determined to correspond to the commercial message in the content stream; means for identifying a position information of a landmark for the given business; means for determining whether the position information of the landmark resides within a map area to be displayed by the navigation system relative to a detected position for a vehicle; and means for triggering off real-time display of the digital video signal, while the display mean displays the commercial message, and providing a map area display of the map area including a landmark display for the landmark that is superimposed within the map area display, wherein the landmark display is caused to flicker to distinguish the landmark from other landmarks on the map area display.