公开(公告)号：BR7400446D0

公开(公告)日：1974-11-05

申请号：BR44674

申请日：1974-01-22

Applicant: MOTOROLA INC

Inventor： CECCIN G ,  HILBERT F

IPC: H04N5/21

Abstract: Unwanted noise components in a derived composite video signal are processed in a novel noise processing circuit to effectively minimize the otherwise deleterious effects on the operation of associated electronic apparatus, such as a television receiver or the like. The circuit arrangement is such that a control signal of a selectably fixed amplitude is developed in response to each such unwanted noise component above a set, predetermined amplitude. The derived control signals are then substituted in place of such undesired noise components, on a one for one basis. A feature of the invention is that the derived control signals replacing the noise components are effected at an intermediate, or gray level, with respect to the video information being displayed and thereby minimizes the overall visual impact that would otherwise be evident.