| 摘要 |
A method of generating a set of filters for a touch sensitive device comprising a touch-sensitive member and a plurality of transducers mounted to the member. The method comprises: determining an initial estimate of a filter to be applied to a respective signal associated with each transducer; defining a model of the system whereby the relationship of vibration of the member to the respective signals can be calculated, the model having a plurality of parameters, calculating the vibration of the member as an output of the model of the system; calculating the output of the model by comparing the output of the model with a measured value; determining changed parameter values of the parameters of the model; recalculating the error value for the output of the model by comparing the output of the model with the changed parameter values with the measured value; comparing the recalculated error value with the reference error value; if the compared recalculated error value is less than the reference error value, setting the recalculated error value as the reference error value, setting the changed parameter values as the model parameters, and repeating the above steps, or, if the compared recalculated error value is greater than the reference error value, outputting the model parameters; generating a set of new filters each using respective output model parameters. |
