Video signal recording and reproducing device

Abstract

Abstract PURPOSE:To effectively cope with both random noise and inpulse noise even if the amount of emphasis is made large by providing plural coefficient circuits and employing a feedback system in a reproduction system. CONSTITUTION:A video signal a3 inputted to a terminal 1 is converted to a signal C3 by a high-pass filter 8, amplitude-limited by a limiter 3, and turned to be a signal d3. The signal d3 is supplied to an adder 10 via a coefficient circuit 29 to be converted to a signal l3, and simultaneously supplied to a subtractor 12 via a coefficient circuit 11 and goes to be a signal b3 which is taken out from an output terminal 6. If an inpulse noise a4 is inputted to the terminal 1, it turned to a signal C4 by the filter 8 and to a signal d4 by a limiter 3. The signal d4 is supplied to an adder 10 via a circuit 29 to be changed to a signal e4, and simultaneously supplied to a subtractor 12 via a circuit 11 to go to be a signal b4 and taken out from the terminal 6. In such case, since the time constant of the filter 8 is set ss as not to let a cross-cut noise occur, both random and inpuse noises can be well coped with even if the emphasis amount is made large.

Inventors

• 👤 Yasutoshi Matsuo
• 👤 泰俊 松尾

Bibliographic Details