Abstract: A method of detecting a digital color picture movement signal precisely and economically for three-dimensional processing for the purpose of improving TV and VTR picture quality comprises the steps of detecting the differential between the brightness signals of an input digital color picture signal and the preceding picture delayed one frame period, of detecting in the input signal brightness signal components having frequencies in the vicinity of the color subcarrier frequency, and of allowing the passage of the brightness signal having components in the higher frequency range of the color subcarrier frequency.

Abstract: In a detecting circuit of a video motion signal, luminance signal components of a video signal and a one-frame-delayed video signal of the video signal are respectively extracted by corresponding comb shaped filters, then the luminance signal component of the video signal is subtracted by that of the one-frame-delayed video signal to generate a luminance frame difference signal.

Abstract: A remote control signal transmitter generates a scan signal. A plurality of scan signal output terminals convey the scan signals to a key matrix circuit having a plurality of column lines and a plurality of row lines connected to the respective scan signal output terminals. Key input terminals are connected to the respective column lines. A custom code selection terminal is selectively connected to the scan signal output terminals in accordance with a custom code corresponding to an instrument to be controlled. The transmitter makes use of scan signals to provide the custom code of the instrument to be controlled. Therefore, only the instrument having this custom code can be activated by the transmitter, and the operating condition of the activated instrument is controlled by the subsequently transmitted key data.