摘要 |
A video signal processing circuit of motion adaptive type includes a circuit for identifying motion of a picture in a video signal on the basis of a difference signal between at least a line signal appearing in an M-th field and a corresponding line signal appearing in an (M-1)th field so that, when a scanning line produced on the basis of the video signal is interpolated between scanning lines of the video signal to improve the picture quality, a signal for interpolating said scanning line is produced in a different manner depending on whether a portion of the video signal to the displayed is a still picture or a moving picture. The motion identifying circuit comprises a horizontal filter (15, 16) spreading the difference signal in the horizontal direction a circuit (17, 18) delaying the output signal of the horizontal filter by one field after attenuation, a line memory (19) delaying the output signal of the attenuating and delaying circuit (17, 18) by one line, and an output circuit (20) generating a signal identifying the motion of the picture on the basis of the output signals of the horizontal filter (15), attenuating and delaying circuit (17, 18) and line memory (19). |
申请人 |
HITACHI, LTD., TOKIO/TOKYO, JP;HITACHI VIDEO & INFORMATION SYSTEM, INC., YOKOHAMA, KANAGAWA, JP |
发明人 |
KATSUMATA, KENJI, TOTSUKA-KU YOKOHAMA, JP;SUGIYAMA, MASATO, SAKAE-KU YOKOHAMA, JP;OKUDA, AKIHIDE, TOTSUKA-KU YOKOHAMA, JP;HIRAHATA, SHIGERU, HODOGAYA-KU YOKOHAMA, JP;NAKAGAWA, ISAO, TOTSUKA-KU YOKOHAMA, JP;SUZUKI, SUNAO, DAI-5-CHOME KAMAKURA-SHI, JP |