Abstract: A motion detection apparatus which extracts a 1-frame differential signal from a video signal, separates the 1-frame differential signal into a vertical low frequency signal having a frequency which is lower than a predetermined frequency with respect to the vertical direction of a frame of the video signal and a vertical high frequency signal having a frequency which is equal to or higher than the predetermined frequency, separates, from the vertical low frequency signal and the vertical high frequency signal, signals having different frequency bands with respect to the horizontal direction of a frame of the video signal, respectively, and combines these separated signals.

Abstract: A motion detection apparatus which extracts a 1-frame differential signal from a video signal, separates the 1-frame differential signal into a vertical low frequency signal having a frequency which is lower than a predetermined frequency with respect to the vertical direction of a frame of the video signal and a vertical high frequency signal having a frequency which is equal to or higher than the predetermined frequency, separates, from the vertical low frequency signal and the vertical high frequency signal, signals having different frequency bands with respect to the horizontal direction of a frame of the video signal, respectively, and combines these separated signals.

Abstract: A video signal processing apparatus comprising a motion vector detecting section detecting a video motion vector from current-field and pre-field video signals or video signal before and after one field of the current-field video signal, a first interpolation signal generating section displacing the pre-field video signal at a unit of block in accordance with the motion vector to generate a first interpolation signal, a second interpolation signal generating section adding the current-field video signal to a vertical high-band component of the first interpolation to generate a second interpolation signal, a comparison reference signal generating section generating a comparison reference signal from the current-field video signal, and an output control section controlling the output of first and second interpolation signals based on a correlation between first and second interpolation signals and the comparison reference signal.

Abstract: A video signal processing apparatus comprising a motion vector detecting section detecting a video motion vector from current-field and pre-field video signals or video signal before and after one field of the current-field video signal, a first interpolation signal generating section displacing the pre-field video signal at a unit of block in accordance with the motion vector to generate a first interpolation signal, a second interpolation signal generating section adding the current-field video signal to a vertical high-band component of the first interpolation to generate a second interpolation signal, a comparison reference signal generating section generating a comparison reference signal from the current-field video signal, and an output control section controlling the output of first and second interpolation signals based on a correlation between first and second interpolation signals and the comparison reference signal.

Abstract: The DC level of the low-frequency component of a horizontal frequency is detected from a video signal by a horizontal low pass filter (LPF) 16d and a DC value detection circuit. In addition, the high-frequency component of the horizontal frequency is detected from the video signal by a horizontal band pass filter (BPF) and a nonlinear circuit. Furthermore, a high-frequency component in the vertical direction is detected from the video signal by a vertical BPF 16i and a nonlinear circuit 16i. On the basis of three detection results, the presence/absence of a non-image portion of the video signal is determined by a determination circuit.

Abstract: The DC level of the low-frequency component of a horizontal frequency is detected from a video signal by a horizontal LPF 16d and a DC value detection circuit 16g. In addition, the high-frequency component of the horizontal frequency is detected from the video signal by a horizontal BPF 16e and a nonlinear circuit 16h. Furthermore, a high-frequency component in the vertical direction is detected from the video signal by a vertical BPF 16f and a nonlinear circuit 16i. On the basis of three detection results, the presence/absence of a non-image portion of the video signal is determined by a determination circuit 16j.

Abstract: A vertical edge detection circuit for a progressive scanning conversion circuit including an input circuit for receiving an interlaced scanning television signal, a first circuit for generating an intra-field difference signal from the interlaced scanning television signal, a second circuit for generating an inter-field difference signal from the interlaced scanning television signal and a third circuit for selectively outputting a maximum value one of the intra-field and inter-field difference signals.