US 11,913,803 B2
Data compression method, non-transitory computer-readable storage medium, and data compression device
Hidetoshi Chikamori, Saitama (JP); Kazumasa Nakamura, Saitama (JP); Hitoshi Konishi, Saitama (JP); Takuji Harayama, Saitama (JP); Tomoaki Masakawa, Tokyo (JP); Naofumi Aso, Saitama (JP); Ryo Matsuzawa, Tokyo (JP); and Zhaoqi Wang, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Jan. 10, 2022, as Appl. No. 17/571,593.
Claims priority of application No. 2021-002772 (JP), filed on Jan. 12, 2021.
Prior Publication US 2022/0221302 A1, Jul. 14, 2022
Int. Cl. G01C 21/00 (2006.01); H03M 7/30 (2006.01); G01C 21/34 (2006.01)
CPC G01C 21/3822 (2020.08) [G01C 21/3469 (2013.01); H03M 7/30 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A data compression method for compressing data indicating a gradient of a route, the data compression method comprising:
acquiring a gradient table that shows gradient values in respective sections arranged between a starting point of the route and an ending point thereof, the sections including one section and a connecting section connecting to the one section:
ranking the gradient values; and
in a case where the gradient value of the one section and the gradient value of the connecting section are in a same rank, integrating the one section and the connecting section to generate a compressed gradient table with integrated section lengths and corresponding integrated section ranks ordered from the starting point.