| 摘要 |
A method of coding a current field macroblock in a B-frame comprises the steps of obtaining a reference frame picture list including multiple reference frame pictures and determining a reference frame picture index of the multiple reference frame pictures in the reference frame picture list based on display order information for the multiple reference frame pictures, reference frame picture index numbers being allocated in a reverse order to the reference frame pictures whose display order is lower than the display order of a current frame picture and the remaining reference frame picture index numbers being allocated in the display order to the reference frame pictures whose display order is higher than the display order of the current frame picture, wherein the current frame picture includes the current field macroblock. According to the invention, the method further comprises the steps of alternately allocating reference field picture indexes that are increased by one to reference field pictures, starting from the reference field picture having a parity equal to the parity of a field picture containing the current field macroblock to the reference field picture having a parity different from the parity of the field picture containing the current field macroblock, while sequentially visiting the reference frame pictures according to the order of the reference frame picture index and performing motion compensation for the current field macroblock in the B-frame by using the reference field picture indicated by the reference field picture index. |
