| 摘要 |
Video decoder decodes pictures B 0 , B 1 , I 2 , B 3 of GOP-3 which have been read out from a recording medium along with recording of new compressed picture data onto the recording medium thereafter to further decode pictures B 4 , P 5 , B 6 . . . to restore them. Namely, it is impossible to restore, only by the compressed picture data of pictures B 4 , P 5 , B 6 . . . , these pictures corresponding thereto. For this reason, picture data of pictures B 4 , P 5 , B 6 . . . which have not been caused to be missing by recording of new compressed picture data are re-encoded to generate new GOP. Thus, the video decoder decodes and restores those non-missing pictures on the basis of the pictures B 0 , B 1 , I 2 , B 3 within the new GOP.
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