| 摘要 |
PCT No. PCT/JP95/01019 Sec. 371 Date Sep. 30, 1996 Sec. 102(e) Date Sep. 30, 1996 PCT Filed May 26, 1995 PCT Pub. No. WO95/33341 PCT Pub. Date Dec. 7, 1995This invention relates to a video coding decoding apparatus for effectively refreshing a video and for recovering degradation of a video caused by code error, in a short time. A video coding decoding apparatus according to the present invention comprises area shape detection (12) for dividing the picture in the single frame into a motion compensation area and the remaining area and then detecting a shape of the motion compensation area by distinguishing between the motion compensation area and the remaining area, and motion vector estimation (14) for estimating a resultant motion vector of the overall motion compensation area from a motion vector of each block in the motion compensation area. A refreshing operation is carried out from a starting point of the estimated resultant motion vector towards the direction of the estimated resultant motion vector in a motion compensation area. When a code error has occurred, code error block number informing circuit (13) informs the number of the block where the code error has occurred. The starting point of the refreshing operation is a block which, among many other adjacent blocks to the informed block, is located in an opposite direction with respect to the estimated motion vector. For this reason, a video can be refreshed effectively and degradation of a video caused by code error, can be recovered in a short time.
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