| 摘要 |
An image encoder of the present invention includes an encoder unit for generating first encoded data, re-encoder unit for re-encoding the first encoded data to generate second encoded data, parameter updating unit for updating of the encoder unit when the sum of data amount of the first and second encoded data reaches a target amount, and controller for starting a re-encoding process when the sum reaches the target amount. The encoder unit encodes still unencoded image data using all encoding parameters that are updated from the parameter that has been used at the beginning of the encoding of the source image data. The image encoder thus encodes image data into data having a desired data amount on a substantial real-time basis. When the encoded data is decoded, non-uniformity in image quality of the decoded image due to different numbers of encoding and decoding operations is controlled.
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