Doc Type: Patent Application
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Abstract

A stop detection unit 112 detects that a vehicle is stopped without utilizing the result of detection by a vehicle speed sensor 171 which employs vehicle speed pulses. And a vehicle speed pulse accuracy decision unit 113 detects the level of vehicle speed pulse accuracy according to the presence or absence of vehicle speed pulses in the state in which stopping of the vehicle is being detected. The degree to which the vehicle speed pulses are employed in processing by a navigation processing unit 116 to perform sensor offset measurement processing, calculation processing for the distance traveled, map matching processing, and the like is varied according to the vehicle speed accuracy which has been obtained in this manner. As a result, it is possible to present navigation information of good accuracy to the user.


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Document History
  • Publication: Oct 15, 2008
  • Application: Jan 18, 2007
    EP EP 07706966 A
  • Priority: Jan 18, 2007
    JP 2007050662 W
  • Priority: Feb 3, 2006
    JP 2006026895 A

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