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Compression of IMU data for transmission of AP

  • US 8,981,904 B2
  • Filed: 03/27/2012
  • Issued: 03/17/2015
  • Est. Priority Date: 11/06/2009
  • Status: Active Grant
First Claim
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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.

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