| 摘要 |
An image processor codes image data utilizing a first memory which stores a reference image in a forward direction, a second memory which stores a reference image in a backward direction, and a third memory which stores an expanded reference image of the reference image stored in the first memory. A first motion vector detector detects a motion vector by reading image data stored in the first memory, and a second motion vector detector detects a motion vector by selectively reading image data stored in the second and third memory. A coder codes input image data by motion compensation prediction using a motion vector detected by the first or second motion vector detector.
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