Moving image coding apparatus, moving image decoding apparatus, moving image coding method and moving image decoding method

Abstract

In a decoding apparatus in accordance with H.264, when the POC type is determined as “1” and a recovery point SEI is detected, the maximum frame number MaxFrameNum (or its integral multiple) is set as the initial value of the frame number offset (FrameNumOffset).

What is claimed is: 
     
         1 . A moving image decoding apparatus in accordance with H.264/AVC, comprising:
 an initialization unit initializing, when decoding is started from a picture to which a recovery point SEI is attached, FrameNumOffset specified in H.264/AVC to an integral multiple of MaxFrameNum; and   a decoding unit decoding a coded stream.   
     
     
         2 . The moving image decoding apparatus according to  claim 1 , wherein
 the initialization unit initializes FrameNumOffset to a same value as MaxFrameNum.   
     
     
         3 . The moving image decoding apparatus according to  claim 1 , comprising
 a calculation unit calculating absFrameNum by adding an integral multiple of MaxFrameNum to frame_num.   
     
     
         4 . Amoving image decodingmethod in accordance with H . 264 /AVC, comprising:
 initializing, when decoding is started from a picture to which a recovery point SEI is attached, FrameNumOffset specified in H.264/AVC to an integral multiple of MaxFrameNum; and   calculating a POC (Picture Order Count) difference using the initialized FrameNumOffset.   
     
     
         5 . The moving image decoding method according to  claim 4 , wherein
 absFrameNum is calculated by adding an integral multiple of MaxFrameNum to frame_num.