Voice guidance timing in a vehicle navigation system

Details Voice guidance timing in a vehicle navigation system Voice guidance timing in a vehicle navigation system

G - Physics

08

G

G08G 1/0968 (2006.01) G01C 21/34 (2006.01) G06F 19/00 (2006.01)

Patent

CA 2217319

A method and apparatus are provided for providing route guidance to a user of a vehicle navigation system. A route is generated which corresponds to a plurality of maneuvers. A warning distance is determined from a particular geographic location associated with a particular maneuver, the warning distance being based in part on a variable parameter. A maneuver instruction corresponding to the particular maneuver is then provided at the warning distance from the particular geographic location. In some embodiments, where the particular maneuver corresponds to a first junction, and a second junction similar to the first junction is within the warning distance, the warning distance is adjusted to an adjusted warning distance.

Méthode et appareil permettant d'indiquer un itinéraire à l'utilisateur d'un navigateur de véhicule. Un itinéraire correspondant à un certain nombre de manoeuvres est généré. Une distance d'avertissement, basée en partie sur un paramètre variable, est déterminée à partir d'un lieu géographique particulier associé à une manoeuvre particulière. Une instruction de manoeuvre correspondant à une manoeuvre particulière est alors émise à la distance d'avertissement du lieu géographique particulier. Dans certaines versions, lorsque la manoeuvre correspond à une première intersection et qu'une seconde intersection, similaire à la première, se situe en deçà de la distance d'avertissement, cette dernière est modifiée et constitue une distance d'avertissement ajustée.

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