| 摘要 |
PURPOSE:To transfer a gain control data to a transversal filter without giving any effect on picture reproduction by providing a storage means storing a produced gain control data. CONSTITUTION:Before a gain control data produced by a gain control data producing means is fed to the transversal filter 16, the data is stored once in an RAM17 provided for the purpose and when a gain control data producing means stops generation of a gain control data, the gain control data stored in the RAM17 is transferred to the transversal filter 16 in a picture non-display period before or after the vertical synchronizing signal. When the transfer is finished, the operation of the said gain control data producing means is restarted and also gate circuits 47, 48 are provided in the input path to the address data and gain control data to the transversal filter, the gate circuits are opened when the gain control data is transferred and closed in other periods. |
