Luminance signal unfolding and reemphasizing circuit

摘要

A video playback device for playing back a video signal recorded to a recording medium such as a magnetic tape by folding a high frequency signal component onto a low frequency signal component. A luminance signal decoding circuit is made such that since a transition between regions of the luminance signal is controlled by utilizing a motional signal contained within the folded luminance signal. The luminance signal of the folded full band width can be restored so as to be distributed in an original frequency band without any deterioration of picture quality.