Pioneer Corporation

Increment P Corporation

Satoshi Kumada

Toshie Shirahama

Kiyoshi Yajima

A navigation terminal device includes a map information display unit, a destination display unit, a route line drawing unitfor holding retrieved location information or destination information or both of them and drawing a route from a reference point based on the retrieved information or destination information to the destination or the retrieved location information so as to be superimposed on the screen with the map information displayed thereon, and route searching unitfor exchanging the display between the reference point and the destination if the reference point disappears from the screen when the destination is displayed, thereby permitting to follow the route from the displayed reference point to the destination or from the destination to the reference point. In this configuration, the operability of a terminal device having a small capacity of screen can be improved and the burden for the user can be relaxed.

Navigation terminal device and navigation method

A navigation terminal device includes a map information receiving unit for receiving the map of the region around a reference point from the web server by inputting retrieval information; a display screen for displaying the received map; a route line drawing unit for drawing the destination from the starting point of the reference point by screen scrolling, computing the orientation from the reference point to the destination, and displaying the route line which can be traced from the reference point to the destination; a map information requesting unit for requesting again that the web server distributes the map information of the adjacent peripheral region if the destination is not within the received map of the peripheral region; and a route line re-drawing unit for searching the destination by screen scrolling the updated map information, re-compute the orientation and re-draw the route line.

A navigation terminal device includes a map information display unitfor displaying, on a screen, the map information containing the location information retrieved by a web servera destination display unit for displaying the destination searched from the map information displayed on the display screen by screen scrolling, a route drawing unitfor drawing the route connecting a reference point based on the location information retrieved by the web serverto the destination so as to be superimposed on the screen with the map information displayed thereon, and a route searching unitfor exchanging the display between the reference point and the destination when the destination is displayed but the reference point disappears from the screen, thereby following the route from the reference point to the destination according to the drawn route information. In this configuration, the operability of a terminal device having a small capacity of screen can be improved and the burden for the user can be relaxed.

There is provided an audio system which suppresses standing waves. An audio signal source ( ) outputs audio signals (S ) and (S ) which are then supplied to reproducing loudspeakers ( ) and ( ),installed in a room ( ), where the reproduced sounds are outputted. Furthermore, the audio signals (S ) and (S ) are added at an adder ( ) to obtain signal (S2) which is in turn filtered by a compensating filter and then inverted by means of an inverting circuit ( ). This generates a compensation signal (Sc) with a phase opposite to that of the standing wave. The compensation signal (Sc) is supplied to a compensating loudspeaker ( ) installed in the room ( ), whereby sound for canceling out the standing wave is outputted. The compensating filter has its frequency characteristics set in accordance with the cross-correlation function between a transfer function from the reproducing loudspeakers, ( ) and ( ), to a listening location and a transfer function from the compensating loudspeaker ( ) to the listening location.

Growing community of inventors

Meguro, Japan

Satoshi Kumada