| 发明名称 |
Motion vector detecting circuit. |
| 摘要 |
A motion vector detecting circuit is for detecting a motion vector in moving picture coding using motion compensation prediction in the unit of block composed of L pixels by block matching between a block in a prediction target image and a candidate block in a reference image. The motion vector detecting circuit comprises a calculating section for calculating a first prediction error between a block in a prediction target image and a candidate block in a reference image using L1 (<L) pixels in block, comparing the first prediction error thus calculated with a threshold, and calculating a second prediction error between a block in the prediction target image and a candidate block in the reference image using L2 (L1<L2</=L) pixels in block if a first prediction error of the candidate block is not more than the threshold; and a comparing section for comparing the second prediction error with a predetermined value and, if the second prediction error is smaller than the predetermined value, replacing the predetermined value with the second prediction error, whereby a motion vector to a candidate block giving a minimum second prediction error is determined as an optimum motion vector. <IMAGE> |
| 申请公布号 |
EP0624981(A2) |
申请公布日期 |
1994.11.17 |
| 申请号 |
EP19940105476 |
申请日期 |
1994.04.08 |
| 申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
MIYAKE, TOSHIYUKI;KUSAO, HIROSHI;KATATA, HIROYUKI |
| 分类号 |
G06T7/20;H04N5/14;H04N7/26 |
主分类号 |
G06T7/20 |
| 代理机构 |
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