Method and device for detection of moving points in a television

Details Method and device for detection of moving points in a television Method and device for detection of moving points in a television

1984-07-09

1986-05-27

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, H04N 712

Patent

active

045919070

ABSTRACT:
In a method for detection of moving points in a television image for digital television systems providing conditional-replenishment bit-rate compression, the image is split-up into blocks of N.times.M points, the points of one block being located at the intersections of N lines and M columns of the image. The N.times.M inter-image differences between values of luminance and/or of chrominance are converted to N.times.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.

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Heath, "Reshaping Information to Suit the Channel", Wireless World, vol. 78, No. 1441, Jul. 1972, pp. 320-324.

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