Route information transmitting method and device

G - Physics – 01 – C

Patent

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G01C 21/00 (2006.01)

Patent

CA 2522808

A route information transmitting method for correctly communicating a recommended route or guide route with an irreducible minimum amount of data to the receiving side. The transmitting side arithmetically processing position data on locations along a route to convert the data into data including statistical deviation, encodes the data into variable length codes, and provides the thus produced compressed data to the receiving side who has requested information on the route. The receiving side decodes the compressed data, restores the position data, and specifies the route by map matching. Thus, route information can be correctly transmitted with a small amount of data.

L'invention concerne un procédé de transmission d'informations routières permettant de communiquer correctement au destinataire une route recommandée ou une route de guide avec une quantité minimale irréductible de données. L'émetteur permet de traiter au niveau arithmétique des données de positionnement sur des emplacements le long d'une route de manière à convertir les données en données renfermant une déviation statistique, de coder les données en codes de longueur variable, et de fournir les données comprimées ainsi produites au destinataire qui a demandé des informations sur la route. Ledit destinataire décode les données comprimées, restocke les données de positionnement et spécifie la route en faisant correspondre les cartes. Ainsi, des informations routières peuvent être correctement transmises avec une petite quantité de données.

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