Patent ID: 8981904
Filing Date: 2015-03-17
Classification: G01C,H04Q

Abstract:
1. A method for data compression in a motion sensing device having an inertial measurement unit with a strap down integration unit and an application processing unit, the method comprising: generating a first velocity increment and a first orientation increment at the inertial measurement unit; rounding the first velocity increment and first orientation increment at the inertial measurement unit, thereby producing a first remainder velocity value and a first remainder orientation value, wherein the step of rounding each velocity increment and orientation increment reduces its bit count from a first bit count to a second lower bit count; combining the first remainder velocity value and the first remainder orientation value with a second velocity increment and a second orientation increment respectively at the inertial measurement unit; and repeating the rounding and combining steps for subsequent velocity and orientation increments at the inertial measurement unit.