| 摘要 |
PURPOSE:To rewrite a screen securely regardless of whether motion occurs or not and its direction by performing interframe predictive encoding while regarding information on the motion as ''0'' for a predetermined time as to a part where the screen is rewritten. CONSTITUTION:A digital television signal is supplied from an input signal line 1 to an interframe encoder with motion compensation. A refreshing circuit 2 generates a refreshing execution signal and a motion compensation inhibiting signal and supplies them to the interframe encoder 5 to control the execution and stop of refreshing and motion compensation. Lines for which refreshing is designated are encoded without interframe prediction and once the refreshing is carried out, predictive encoding is carried out with the motion compensation inhibiting signal while it is considered that there is not any motion at all for a prescribed period, e.g. N-line period. Consequently, the movement and expansion of an error occurring in the endocing are removed. |
