| 摘要 |
<p>PURPOSE:To predict an erroneous important word with high accuracy in the block conversion coding such as ADRC. CONSTITUTION:A motion detection circuit 5 detects a motion at every block at the time of coding and records a motion flag together with coded data. A motion flag is given to a memory 24 at the time of decoding to switch data used for prediction. That is, when an important word of a remarkable block has an error and the remarkable block is a motion block, data belonging to a same filed only are used as prediction data, and when the remarkable block is a still block, data without belonging to the same field are also used. Thus, an important word is predicted with high accuracy even in a motion block or a still block.</p> |
