Television – Image signal processing circuitry specific to television – Motion vector generation
Patent
1994-10-31
1995-09-19
Britton, Howard W.
Television
Image signal processing circuitry specific to television
Motion vector generation
348208, H04N 736
Patent
active
054520215
ABSTRACT:
When an image motion vector is to be detected, correlation calculations are performed by a correlation calculation circuit (12) and the motion vector is detected from the result. At this time, the video signal undergoing correlation calculations has a half-line deviation between the fields in the vertical direction caused by interlace. Then, the detected motion vector contains an error of half a line derived from the above deviation. Therefore, a motion vector correction circuit (14) corrects the error by adding to or subtracting from the motion vector derived by the motion vector detection circuit (13) a predetermined number corresponding to half a line. Further, a vertical-direction interpolation circuit (31) is provided to produce a vertical-direction interpolation signal for a video signal. One of video signals performed with correlation calculations in a correlation calculation circuit (33) is always the video signals interpolated in the vertical direction. Thereby the above described error is corrected.
REFERENCES:
patent: 4731651 (1988-03-01), Matsumoto
patent: 4984074 (1991-01-01), Uomori
Uomori, et al, "Automatic Image Stabilizing System By Full-Digital Signal Processing," IEEE Transactions on Consumer Electronics, vol. 36, No. 3, pp. 510-519, Aug. 1990.
Kai, et al, "The Electronic Picture Stabilizer," ITEJ Technical Report, vol. 11, No. 3, pp. 43-48, May 1987.
Kusaka Hiroya
Sakaguchi Takashi
Britton Howard W.
Matsushita Electric - Industrial Co., Ltd.
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