Pioneer Electronic Corporation

Shinichi Takemura

Tsutomu Honda

Hitoshi Ando

Masashi Shimakata

Masaya Adachi

Hayato Yoshida

Shigeru Tsujimura

Tohru Yoshihara

Isao Endo

Shozaburo Sakaguchi

Kenichiro Kawasaki

A navigation apparatus for a vehicle using a GPS (Global Positioning System) as sensing means in which information on the basis of sensing results, such as a present position, a running locus and the like are displayed in a predetermined form of display on a display section is disclosed. In cases where the GPS receiver cannot receive radio waves from artificial satellites, and sensing thus becomes disabled, a sensed final present position is displayed with an altered form of display.

Navigation apparatus for vehicles

A navigation apparatus for a vehicle using a GPS (Global Positioning System) as sensing means in which information on the basis of sensed results, such as a present position, a running locus and the like are displayed in a predetermined form of display on a display section is disclosed. In cases where the GPS receiver cannot receive radio waves from artificial satellites, and sensing thus becomes disabled, a sensed final present position is displayed with an altered form of display.

A vehicle navigation apparatus comprises a self-contained positioning system, GPS positioning system, and a controller for performing arithmetic operation on the basis of the output of any one of the self-contained positioning system and the GPS positioning system so as to display various navigation information on a display. The controller corrects the bearing data based on the self-contained positioning system with respect to that based on the GPS positioning system if the bearing data of self-contained positioning system differs from that of the GPS positioning system by more than a predetermined value when a vehicle velocity determined on the basis of the position data from any one of the positioning systems exceeds a predetermined value.

Vehicle navigation apparatus

A drop-out corrector circuit for video signals read from a recording medium such as a video disk or the like. Predetermined components, specifically envelope components, are detected in the high-frequency signal read from the disk including the video signal. The output level of the detection signal thus produced is compared with a reference level, and a drop-out detection signal is produced as the result of this comparison.

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Saitama, Japan

Shinichi Takemura