Method and apparatus for limiting band of moving-picture signal

摘要

A motion-compensated predictive error signal is generated in response to a moving-picture signal for every frame related to the moving-picture signal. Calculation is made as to an activity for each of pixels composing the frame in response to the motion-compensated predictive error signal. The activities for the respective pixels composing the frame are accumulated to calculate a 1-frame activity accumulation value. A band of the moving-picture signal in at least one of a spatial direction and a temporal direction is limited with a controllable band limiting characteristic. The controllable band limiting characteristic is controlled in response to the activity for each of the pixels and the 1-frame activity accumulation value. <IMAGE>