| 摘要 |
A video signal processing apparatus includes a non-equidistant section determination circuit, a sample data register, and an interpolation computation circuit. The non-equidistant section determination circuit detects a non-equidistant section having different intervals between plural sample points set for the dynamic range of a video signal to be inputted. The sample data register holds the signal level (correction level) of a video signal after correction for each sample point. The interpolation computation circuit obtains the signal level of the video signal after correction by executing cubic interpolation computation with reference to the correction level. Here, a first section is defined as a section located on a lower signal level side and having intervals of X (X>0) between sample points, and a second section is defined as a section located on a higher level side and having intervals of Y (Y>0, X<>Y) between sample points. With respect to the border point between the first and the second sections, the interpolation computation circuit obtains the signal level of the video signal after correction by use of the correction level of a sample point added so that the second section can be formed on the lower level side and/or the first section can be formed on the higher level side.
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