| 摘要 |
PURPOSE:To decrease noise with a simple constitution, by passing the same signal to a signal delay circuit repetitively. CONSTITUTION:A color difference signal via low pass filters LPF1, LPF2 is multiplied with a prescribed coefficient at coefficient devices FM1, FM2 and given to adders ADD11, ADD12. The output of the adders ADD11, ADD12 is given to modulators MOD1, MOD2 and given to delay circuits DL11, DL12 for a delay of 1H and given to coefficient devices FM3, FM4. The output of the devices FM3, FM4 is given to the adders ADD11, ADD12, where the outputs of the devices FM1, FM3 and FM2, FM4 are summed. |
