H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/33
H04N 7/36 (2006.01) G06T 7/20 (2006.01)
Patent
CA 1224870
ABSTRACT OF THE DISCLOSURE In a method for detection of moving points in a television image for digital television systems providing conditional-replenishment bit-rate compres- sion, the image is split-up into blocks of N x M points, the points of one block being located at the intersections of N lines and M columns of the image. The N x M inter-image differences between values of luminance and/or of chrominance are converted to N x M coefficients by means of an orthogonal transformation. The absolute values of the coefficients obtained are compared with one or a number of predetermined reference thresholds in order that the points placed at the center of a block should be stated as moving when the absolute value of at least one coefficient obtained as a result of this transformation is higher than at least one predetermined reference threshold. The device comprises an array of shift registers for storing the inter-image differences, a matrixing element for calculating the coefficients and a decision element.
458790
Goudreau Gage Dubuc
Thomson-Csf
LandOfFree
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