| 摘要 |
A method for selecting a reference picture is provided to allocate an index value to a reference frame with a low display order than a B frame in reverse order and allocate remaining index values to a reference frame with a high display order than the B frame in a reference frame list 0, and allocate an index value to a reference frame with a high display order than a B frame and allocate remaining index values to a reference frame with a low display order than the B frame in reverse order in a reference frame list 1, thereby providing reference picture information used in motion compensation efficiently. A method for selecting a reference picture comprises the following steps of: acquiring a reference picture list including information about plural reference pictures by frame; realigning a reference picture index allocated to each reference picture of the reference picture list; acquiring a reference picture index indicating a reference picture by field for a field macro block; determining one of reference pictures by frame included into the reference picture list based on the reference picture index as a reference picture; and selecting a reference picture by field having a parity different from the parity of the field macro block if the reference picture index is an odd number. |
