JP2010011075A5 - - Google Patents

Claims (5)

In the moving picture coding method for dividing an input image signal into a plurality of pixel blocks, performing a prediction process of each pixel block using a reference image signal, and coding a difference signal between the input image signal and the predicted image signal,
A mask generating step for generating a binary moving area separation mask indicating a moving area and a background area for each reference image signal;
A background image generating / updating step for generating or updating one background image signal based on a comparison of two or more reference image signals or a binary moving region separation mask value for each reference image signal;
Using the moving region separation mask, (1) motion compensation processing is performed on the first portion of the prediction target image corresponding to the moving region, and (2) the prediction target image corresponding to the background region is selected. In the second part, a predicted image generation step of generating a predicted image signal by supplementing a signal obtained by interpolating the signal of the background image, and
A moving picture encoding method configured to include:   In the mask generation step, a criterion for determining a pixel of the reference image as the moving region or the background region is determined according to a value derived from a difference value of pixels between two or more available reference images or in the reference image. The moving image encoding method according to claim 1, wherein the determination is performed. The mask generation step and the background image generation / update step include
Estimating a global vector for correcting an amount of change between images due to a change in an imaging system between any of two or more available reference images and the prediction target image; and an estimated global Using the image interpolated based on the vector, generating the dynamic region separation mask and generating or updating the background image signal;
Encoding information on the global vector in units of any one of a sequence, an image, a slice, and a block;
The moving picture coding method according to claim 1 or 2, characterized by comprising: The predicted image generation step includes a step of changing a coefficient of a filter that generates an interpolated image of integer accuracy or fractional accuracy for each pixel position, for the pixel in which the moving region separation mask is determined to be a moving region, and the change Encoding the information regarding the filter coefficients in units of any one of each sequence, each image, each slice, and each block;
The moving picture encoding method according to claim 1, further comprising:   The mask generation step is derived from a weight based on a distance between a plurality of pixels of the moving region separation mask and spatially or temporally close to the generated moving region separation mask and a difference value of the pixels. The method includes a step of performing correction such as isolated point removal, discontinuous point connection, area enlargement / reduction to a rectangular block, edge correction, pixel compensation, pixel matching, and the like based on the value to be determined. 5. The moving image encoding method according to any one of 1 to 4.