| 摘要 |
<p>A method, apparatus, and article of manufacture for restoring a deteriorated signal (201) to an undeteriorated signal (213). A deteriorated signal (201) consists of a plurality of deteriorated and undeteriorated data points. For each deteriorated data point, a plurality of class types is created based upon characteristics of the area containing the deteriorated data point. The data point is classified with respect to one of the plurality of class types and assigned a corresponding input signal class (205). The undeteriorated signal (213) is generated by adaptively filtering the deteriorated input signal (201) in accordance with the input signal classification result (209). More than one classification method is used to create the plurality of class types. Created classes may include a motion class (1809), an error class (1811), a spatial class (1807) or a spatial activity class. An adaptive class tap structure (1813) is used to create the plurality of class types for improvement of classification quality. The spatial class taps can be selected adaptively according to the motion and/or error class. The spatial activity class taps can be selected adaptively according to the motion and/or error class.</p> |
