Image signal processing apparatus.

摘要

An image signal processing apparatus for processing an MUSE signal or an NTSC signal comprises frame delay means (500); movement detection means (600, 610, 617) for detecting the movement of an image on the basis of the difference signals in one frame interval and two frame interval of image signals which are supplied from said frame delay means and relatively different in their time; moving picture processing means (300) for providing a first image signal for a moving picture part of a field of the image in issue; still image processing means (400) for providing a second image signal for a still image part using the image signals of plural frames; and mixing means (70) for mixing outputs from said moving picture processing means and still image processing means using an output from said movement detection means as a control signal. The movement detection means comprising a one frame interval movement detection circuit (600), a two frame interval movement detection circuit (610) and a composition circuit (617) for composing output from said movement detection circuits. The one frame interval movement detection circuit is adapted to use a low frequency signal component which does not include a frequency-multiplexed signal component for both A and B signals in the transmission modes with different detected signal components, and said two frame interval movement detection circuit comprises a frame memory for providing frame delay to a movement signal based on a two frame interval difference signal so as to produce an inter-frame interpolated signal for the MUSE signal and prepare a composite signal of an input to and an output from the frame memory for the NTSC signal.