| 摘要 |
<p>PURPOSE: To exclude jitter from a picture by dividing the sequential line cycle of a picture into two parts, and selecting one of three field sequence processed based on additional information components. CONSTITUTION: The sequence of an original picture is obtained with a 50Hz frequency, and a line cycle for forming those pictures is divided into two parts with the first line cycle. Sequential fields for forming the pictures are stored in an acting cycle corresponding to one cycle of those pictures, that is, 40ms in this case, and at a rate corresponding to a prescribed time rate after conversion, and the stored fields are processed in parallel by three processing channels. In the case of a picture without any large movement, it is processed by simple field repeated use, in the case of a picture with intermediate prevailing movement, it is processed by the half of movement-compensated sum, therefore, it is compensated as a result, and in the case of a picture with hard movement, it is processed by a filter. Then, only one of the three field sequence processed in this way is selected so that a signal obtained with a new time rate after conversion can be constituted. Thus, jitter can be excluded.</p> |
