Noise reducer, noise reducing thereof, picture signal processing apparatus, and motion detecting method

摘要

A detecting circuit detects a moving vector for each block. Corresponding to the moving vectors, a plurality of moving portions in one field are extracted. Thus, a moving vector of each moving portion is generated. In a field memory, a motion compensating process is performed corresponding to the moving vectors. A field difference between the input signal and a signal that has been movement-compensated is supplied to an Hadamard transform circuit. The Hadamard transform circuit divides the field difference signal into a plurality of frequency components. A non-linear circuit has noise components corresponding to individual frequency bands. An output signal of the non-linear circuit is supplied to an inverse-Hadamard transform circuit. The inverse-Hadamard transform circuit performs an inverse-Hadamard transform process. The resultant signal is subtracted from the input picture signal.