| 摘要 |
PROBLEM TO BE SOLVED: To provide a motion compensation scanning conversion circuit for an image signal. SOLUTION: A still picture interpolation section 2 generates an interpolation signal IPS suitable for a still region, a moving picture interpolation section 3 generates an interpolation signal IPM suitable for a moving picture region from an interlace scanning input image signal S1 (luminance and color-difference signals), and an MC interpolation section 4 generates an interpolation signal IPMC on the basis of a motion vector MV through motion compensation signal processing. A mixer section 8 applies weight sum calculations using a coefficient value determined by a weight coefficient WT to the interpolation signals IPS, IPM, IPMC to generate an interpolation signal IP. Then a double speed conversion section 9 obtains a signal S2 whose time delay attended with the signal processing is adjusted by a delay section 1 and an output image signal S3 (luminance and color-difference signals) converted into noninterlaced scanning through time base half compression and time series rearrangement processing applied to the interpolation signal IP. A motion vector detection section 5 detects a motion vector from the luminance signal of the input image signal S1 through block matching processing to output a motion vector MV and its prediction error ER. An MC interpolation reliability discrimination section 6 discriminates the reliability of motion compensation processing from the input image signal S1 and the luminance signal of the interpolation signal IPMC and outputs the result as a binary signal CF. A setting section 7 sets the value of the weight coefficient WT on the basis of the motion vector MV, its prediction error ER and the binary signal CF.
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