Patent ID: 7725005

Claim:
A signal processing apparatus comprising: a signal processing means; a first storage means for storing first data, wherein the first data includes data associating position data and linkage data referring to second data; a second storage means for storing the second data and connected to the signal processing means; a position signal receiving means for receiving a position signal indicating a position of the signal processing apparatus; a display control means for controlling display of the first data and the second data; wherein the linkage data includes format attribute of the second storage means; deciding means for deciding, based on analyzing the format attribute of the second storage means included in the linkage data, whether the second data in the second storage means is retrievable; wherein the display control means controls display of additional information indicating the second data in the second storage means is retrievable, based on the decision of the deciding means, and wherein the displayed additional information is selectable by a user of the signal processing apparatus; and wherein the signal processing means is operative to retrieve the first data stored in the first storage means based on the position signal received by the position signal receiving means, and retrieve the second data in the second storage means when the second data in the second storage means is retrievable, based on the decision of the deciding means; wherein, in response to the user selecting the displayed additional information, the signal processing means retrieves the second data from the second storage means.