Noise reduction device

Abstract

Abstract PURPOSE:To remove the noise of the plane part of an input signal, to keep the pulse characteristic of the edge of a video signal and to prevent a smear from being generated in a reproducing image by executing the noise removing of an edge part, a rounding correcting and the removal of the high frequency noise of a low level. CONSTITUTION:The title device provides first noise removing means 2, 4 and 5 to remove the edge part noise of the video signal, correcting means 8, 9, 10 and 11 to correct the rounding of an edge part waveform in an output signal by adding a signal to waveform-shape processing signals in the first noise removing means 2, 4 and 5 with the output signals of the first noise removing means 2, 4 and 5, a detecting means 7 to detect the edge part of the video signal and a second noise removing means 12 to remove only the high frequency noise of the low level of the video signal from the output signal of the correcting means with using a detecting signal in the detecting means 7. Thus, the high frequency noise is removed and the video signal without the rounding of the edge part waveform is obtained. As the result, without losing the clearness of the edge part, the reproducing signal not to generate the smear can be obtained.

Inventors

• 👤 Takao Sasakura

Bibliographic Details