| 摘要 |
An excellent picture coding scheme, adapted to suit any particular picture movement, divides an input picture data into two-dimensional small blocks including frame small blocks and field small blocks, then calculates the block activity of the frame and field small blocks. By comparing field block activity with frame block activity, a total of two-dimensional blocks indicating that field block activity is greater than frame block activity is calculated. When the total calculated above is equal to or greater than a predetermined value, frame unit coding is performed. When the total calculated above, however, is below the predetermined value, the frame is divided into odd-and even-numbered fields and a field unit coding is performed for the frame.
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