Importance

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Abstract

The luminance and chrominance signals of a PAL or SECAM composite video signal are separated by means of a method comprising the following steps: sampling and digitizing the composite video signal; determination of a luminance signal and a chrominance signal by means of a first processing channel, from the digital sample of the current point of the image, from a previous sample corresponding to the current point located on the line in the previous field which is spatially positioned in the image immediately beneath the current line, from the luminance signal values already determined in a spatiotemporal neighborhood of the current point and in accordance with an analysis of the local spatiotemporal context of the current point; determination of a luminance signal and a chrominance signal by means of a second processing channel by applying the digital composite signal to the input respectively of a luminance filter and a chrominance filter; selection of the luminance and chrominance signals which are present at the output of the first processing channel or of the second processing channel as a function of an analysis of the local spatiotemporal context of the point performed on the basis of the luminance signal determined by the second processing channel and on the basis of the luminance signal values already selected and delayed by a field period.

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First Claim