Patent ID: 6356592
Filing Date: 2002-03-12
Classification: H04N

Abstract:
A moving image coding apparatus comprising:motion compensation type moving image coding means comprising a subtraction circuit having first and second inputs and an output connected to an encoder, said coding means for predicting a pixel block in a current frame from a preceding frame by a motion compensation scheme, and performing orthogonal transformation and quantization for a predicted error, thereby coding the predicted error; intraframe filter means for performing intraframe filtering for each pixel of an input frame and having an output connected to said first input of said subtraction circuit; and means, operative without the use of an activity signal indicating a variation of luminance intensities of pixels within an input frame, for adaptively determining and setting a filter characteristic of said intraframe filter means on the basis of a pixel of the input frame and a corresponding pixel of a predicted image or adaptively selecting an output from said intraframe filter means having an optimal filter characteristic on the basis of a pixel of the input frame and a corresponding pixel of a predicted image said pixels of said predicted image providing a predicted image signal to said second input of said subtraction circuit.