Moving picture coding method and moving picture decoding method

Abstract

The moving picture coding apparatus includes a motion compensation coding unit ( 107 ) for deciding a coding mode for coding a current block to be coded and for generating predictive image data based on the coding mode; and a direct mode enable/disable judgment unit ( 109 ) for judging whether or not scaling processing can be performed when the coding mode decided by the motion compensation coding unit ( 107 ) is a temporal direct mode. When it is judged that the scaling processing cannot be performed, the motion compensation coding unit ( 107 ) performs motion compensation either by using another coding mode or without the scaling processing.

1 . A semiconductor for coding a block image of a picture, comprising: 
 an obtaining unit operable to obtain a motion vector of a co-located block included in a coded picture, the co-located block being co-locked with a current block included in a current picture to be coded;    a judging unit operable to judge whether or not scaling can be performed for the motion vector by determining whether or not a display order information of the coded picture including the co-located block is identical to the display order information of a reference picture to be referred to by the co-located block; and    a generating unit operable to generate a motion vector of the current block without scaling in a case in which said judging unit judges that scaling cannot be performed, and to generate a motion vector of the current block through scaling in a case in which said judging unit judges that scaling can be performed; and    a performing unit operable to perform motion compensation of the current block using the motion vector generated by said generating unit.    
   
   
       2 . A mobile terminal comprising the semiconductor according to  claim 1.