| 主权项 |
1. A moving image encoder comprising:
a motion estimator configured to divide a picture including a luminance signal and a chrominance signal into a plurality of encoded blocks, to reference an encoded picture so as to calculate a motion vector of the luminance signal in each of the plurality of encoded blocks, the encoded picture being provided with a first area in which reference by a subsequent picture is allowed and a second area in which the reference is inhibited, the encoded picture having a reference area of the motion vector of the luminance signal restricted, and to calculate the motion vector of the chrominance signal on the basis of the calculated motion vector of the luminance signal; a filter configured to individually perform filtering on the luminance signal and the chrominance signal in a decoded image of a picture to be encoded; a boundary position calculator configured to calculate a reference restriction type that indicates a combination of a reference restriction boundary position indicating a boundary position between the first area and the second area before the filtering on a current picture to be encoded, and a position relationship between the first area and the second area; a suppression determiner configured to determine whether the filtering on the chrominance signal is suppressed on the basis of the reference restriction type, and to generate chrominance filter suppression information; an inhibiting mode specifier configured to calculate the encoded block in which the filtering on the chrominance signal is suppressed on the basis of the reference restriction boundary position before the filtering, and to specify a chrominance filter inhibiting mode indicating a chrominance filter mode in which a pixel included in the second area may be referenced; a reference restriction specifier configured to specify a reference restriction position of the luminance signal after the filtering on the basis of the reference restriction boundary position before the filtering and the chrominance filter suppression information; and an encoder configured to encode the picture to be encoded by using the motion vector of the luminance signal that has been derived by referencing the first area on the basis of the chrominance filter mode selected from among the chrominance filter modes other than the chrominance filter inhibiting mode, and the reference restriction position of the luminance signal after the filtering. |
