Patent ID: 7796783

Claim:
A motion detection device comprising: an oblique correlation detection section for detecting an oblique correlation of a composite video signal; a motion detection section for detecting a motion amount based on an inter-frame difference of the composite video signal; and a motion determination section for determining the presence of a motion in the composite video signal based on the motion amount detected by the motion detection section, wherein the motion determination section determines the presence of the motion considering the detection results of the oblique correlation obtained by the oblique correlation detection section, wherein the motion detection section comprises: a first motion detection circuit for detecting a motion amount based on a one-frame difference of the composite video signal; and a second motion detection circuit for detecting a motion amount based on a two-frame difference of the composite video signal, wherein the motion determination section comprises: a first motion determination circuit for determining the presence of a motion in the composite video signal based on the motion amount detected by the first motion detection circuit; and a second motion determination circuit for determining the presence of a motion in the composite video signal based on the motion amount detected by the second motion detection circuit, and wherein the first and/or second motion determination circuit determines the presence of a motion considering the determination results of the oblique correlation obtained by the oblique correlation detection section.