| 摘要 |
PURPOSE:To ensure the effective elimination of the ghost signal by extracting the speficied horizontal scanning line signal waveform, calculating the tap gain correction value based on the signal waveform and the refrence waveform and correcting the tap gain of the transversal filter with the output. CONSTITUTION:The tap gain load addition is given to the TV picture receiving signal via the transversal filter consisting of CCD11 and multiplier 12 to be then deliversed. And the specified horizontal scanning line signal waveform is extracted through shift register 15 and 16 within the vertical flyback time of the output. The tap gain correction value is obtained through arithmetic circuit 23 and based on the extracted signal waveform and the reference waveform set previously at memory 21, and the tap gain is corrected for the transversal filter via adder circuit 25 and based on the tap gain correction value. In such way, the ghost signal can be eliminated effectively for the TV picture receiver. |
