Victor Company of Japan, Limited

Yoshiaki Hanashiro

Hisao Kinjo

Katsuyuki Shudo

Michihiro Aso

Kenji Matsuoka

Taro Watanabe

Keigo Okano

In an apparatus for detecting amounts of relative motion of a picture expressed by a digital video signal, between successive fields of the signal, a fixed set of picture element positions are designated as respective representative points in each field of the video signal. For each representative point, the signal level value for that point during a preceding field is compared with each of a successive of picture element values in the current field, within a corresponding comparison interval which extends prior to and subsequent to the position of that representative point in the field. In addition, a corresponding value of relative distance between each picture element for which a result is obtained and that representative point is derived as a binary value, and the result is cumulatively stored with corresponding results for other representative points in an address of one of a plurality of memory sections, with the particular memory section being assigned in accordance with the state(s) of one or more high-order bits of the corresponding relative distance value and the address being assigned in accordance with the remaining low-order bits of that distance value.

Apparatus for detecting relative motion between contents of successive

In apparatus for recording/reproducing a composite video signal on and from a rotary recording medium (1), the field of the composite video signal is detected and only odd or even field signal is delayed by one half (H/2) a horizontal scanning period so that the composite video signal is changed to a modified composite video signal which is recorded on the rotary recording medium (1) together with a field distinguishing signal (Sf) produced using the result of the field detection. The field distinguishing signal (Sf) is arranged to be located at a given time position with respect to a predetermined vertical sync signal of every one frame period of the recording signal on a rotary recording medium (1) driven and rotated at a rotational period equal to the vertical scanning period of the composite video signal. This field distinguishing signal is extracted from a reproduced signal obtained in reproduce mode so that field switching is effected using the reproduced field distinguishing signal thereby delaying only even or odd field signal, which has not been delayed on recording, for obtaining a composite video signal having sync signals which with regular interlaced scanning can be performed.

Apparatus for recording/reproducing a composite video signal with a

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Yokohama, Japan

Yoshiaki Hanashiro