Information Terminal, Server Device, Searching System, and Searching Method Thereof

An information terminal comprising,

• an audio input accepting unit adapted to accept an input of speech information,
• a communication unit adapted to establish communication with a predetermined server device via a network,
• an output unit,
• a POI specifying unit adapted to transmit the speech information accepted by the audio input accepting unit to the server device, and receive information specifying a candidate of a POI (Point Of Interest) associated with the speech information,
• a POI candidate output unit adapted to output to the output unit, the information specifying the candidate of the POI received by the POI specifying unit, and
• a route searching unit adapted to accept a selective input of the information specifying the candidate of the POI, and search for a route directed to the POI, wherein,
• the POI specifying unit compresses the speech information accepted by the audio input accepting unit with a predetermined compression rate and transmits the speech information being compressed to the server device, and
• when a quality of the speech information being accepted by the audio input accepting unit is equal to or lower than a predetermined level, the POI specifying unit sets the predetermined compression rate to be a value which mitigates deterioration of the quality.