| 摘要 |
During re-encoding, the picture type before frame-by-frame decoding and the picture type during re-encoding are matched thus enhancing an image quality during the re-encoding operation. Further, by making variable the data volumes that need to be matched between picture information before decoding and picture information during re-encoding, it is possible to realize re-encoding of optimal processing volumes (volumes of picture information that need to be matched in units of frame) for a variety of systems. Further, during re-encoding, the bit volume information used in decoding is used by the encoding unit. The encoding unit uses this bit volume information by combining the bit volume information with the bit allocation target value or I, P, B picture used during re-encoding and performing arithmetic operations on the bit volume information-based bit allocation target value.
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