Patent ID: 6895056
Filing Date: 2005-05-17
Classification: H04N

Abstract:
1. A method of performing an adaptive filter operation on an input data sample to generate an output data sample, where a logical computation is performed on a logical data item to determine whether a filtering computation should be applied to the input data sample, the method comprising the steps of: (a) transforming the logical computation into an equivalent logical computation that incorporates the filtering computation; (b) storing the input data sample and the logical data item within a data word; (c) employing a data processing unit to apply the filtering computation to the data word, resulting in the data word containing a filtered data sample and a modified logical data item; (d) comparing the modified logical data item with predetermined criteria; and (e) outputting as the output data sample either the input data sample or a data sample derived from the filtered data sample, dependent on the comparison at said step (d).