One embodiment relates to a method of velocity prediction using a sensor
array. Differential signals are obtained from the sensor array at
multiple frame rates. A first velocity prediction is determined from the
differential signals at a first frame rate, and a second velocity
prediction is determined from the differential signals at a second frame
rate. Another embodiment relates to an optical navigation apparatus which
includes a sensor array, differential circuitry, driver circuitry, and a
signal processing device. The driver circuitry is configured to drive the
sensor array and differential circuitry so as to operate at multiple
frame rates in an interleaved manner. The signal processing device is
configured to compute a first velocity prediction from the differential
signals at a first frame rate and to compute a second velocity prediction
from the differential signals at a second frame rate. Other embodiments
and features are also disclosed.