IMAGE ENCODING METHOD AND IMAGE DECODING METHOD

摘要

A picture coding apparatus (400), which employs pixel interpolation for generating a predictive picture, selects either a pixel interpolating unit A (403) or a pixel interpolating unit B (404) according to the value of a picture type signal PicType. When the value of the picture type signal PicType is "0" indicating a B picture, the pixel interpolating unit A (403), which is embodied by a pixel filter whose filter tap number is "4", for calculating a pixel value of a half pixel in the predictive picture is selected, and when the value of the picture type signal PicType is "1" indicating a picture other than a B picture, the pixel interpolating unit B (404), which is embodied by a pixel filter whose filter tap number is "8", is selected.