Method and apparatus for performing two dimensional video convolving

A two dimensional video convolver comprising:

• a first adder stage responsive to a reception of binary data from a plurality of three pixels in a predetermined line in a first direction of a video picture to be reproduced on a video display during each pixel scan period for adding the binary data of the plurality of X pixels multiplied by predetermined weights by using bits of the binary data of a pixel as received when the weight for that pixel is an integer one, and by shifting the received bits of the binary data for the pixel by a predetermined number of y bits when the weight to be applied is greater than the integer one and is equal to 2.sup.y, to generate a binary first adder stage output signal corresponding to an weighted sum of the plurality of 3 pixels in the predetermined line in the first direction;
• delay means for receiving the binary first adder stage output signal, and generating therefrom a first delayed output signal corresponding to the binary first adder stage output signal delayed by one pixel scan period, and generating a second delayed output signal corresponding to the binary first adder stage output signal delayed by two pixel scan periods;
• and
• a second adder stage responsive to the binary first adder stage output signal and the first and second delayed output signals from the delay means for each of first, second, and third predetermined lines, respectively, in a second orthogonal direction of the video picture to be reproduced on the video display, and processing the signals for each of the plurality of three lines with predetermined weights by using bits of the binary data of a line as received from the first adder stage output signal and the first and second delayed output signals when the weight for a line is an integer one, and by shifting the received bits of the binary data by a predetermined number of y bits when the weight for the line is greater than the integer one and is equal to 2.sup.y, to generate a binary video convolver output signal corresponding to an weighted sum of the plurality of three pixels in a first direction over the plurality of three lines in the second orthogonal direction.

A method of convolving a three-by-three matrix of binary pixel data received in a two dimensional video convolver for generating a video convolver output signal corresponding to a weighted sum of three pixels in a first direction or the matrix in three lines in a second orthogonal direction of the matrix, the method comprising the steps of:

• (a) simultaneously receiving binary data for three pixels in a predetermined line in the first direction during each pixel scan period;
• (b) adding the binary data for the three pixels received in step (a) in a first adder stage of the video convolver and multiplying the binary data for the three pixels by predetermined weights by using bits of the binary data of a pixel as received when the weight for that pixel is an integer one, and by shifting the received bits of the binary data by a predetermined number of y bits when the weight of that pixel is greater than the integer one and is equal to 2.sup.y, for generating a binary first adder stage output signal corresponding to an weighted sum for the plurality of three pixels in the predetermined line in the first direction;
• (c) generating a first delayed output signal corresponding to the binary first adder stage output signal from step (b) delayed by one pixel scan period, and a second delayed output signal corresponding to the binary first adder stage output signal from step (b) delayed by two pixel scan periods in a delay means;
• and
• (d) adding the binary first adder stage output signal and the first and second delayed output signals from the delay means for three predetermined lines in a second orthogonal direction of the video picture to be reproduced on the video display, and processing the output signals for each of the plurality of three lines with predetermined weights by using the bits of the binary data of a line as received in the first adder stage output signal and the first and second delayed output signals when the weight for that line is an integer one, and by shifting the received bits of the binary data by a predetermined number of y bits when the weight for that line is greater than the integer one and is equal to 2.sup.y, to generate the video convolver output signal corresponding to a weighted sum of the plurality of three pixels in a first direction over the plurality of three lines in the second orthogonal direction.