Graphics video resolution improvement apparatus

Claim 2

A video signal generator comprising: a scan line generating means for repetitively generating video scan lines having a predetermined scan line period including a plurality of picture elements, each picture element having at least one video attribute; a delay means connected to said scan line generating means for delaying video scan lines for one scan line period; an interpolation means connected to said scan line generating means and said delay means for repetitively generating interpolation scan lines by generating picture elements having at least one video attribute formed by combining said at least one video attribute of a picture element of a video scan lines and said at least one video attribute of a corresponding picture element of a delayed video scan line from said delay means; and a video signal combining means connected to said scan line generating means and said interpolation means for generating a combined video signal including said video scan lines and said interpolation scan lines.

Claim 3

A video signal generator as claimed in Claim 1, wherein said scan lines generating means comprises: a memory means for storing a plurality of digitally coded words, each digitally coded word representing said at least one video attribute of a corresponding picture element; a memory controller means connected to said memory for causing said memory to read out digitally coded words in a preselected order corresponding to the order of picture elements in successive video scan lines; and an analog signal generating means connected to said memory means for converting said digitally coded words read out of said memory means into picture elements having at least one video attribute represented by said corresponding digitally coded words.

Claim 4

A video signal generator as claimed in Claim 2, wherein said analog signal generating means includes a picture element interpolation means for generating interpolation picture elements between said picture elements corresponding to successively read out digitally coded words, said interpolation picture element having at least one video attribute formed by combining the at least one video attribute represented by said successively read out digitally coded words.

Claim 5

A video signal generator as claimed in Claim 2, wherein: each of said digitally coded words stored in said memory means comprises one of a predetermined set of color codes, each color code representing a predetermined brightness and predetermined first and second primary color intensities; and said analog signal generating means includes means for generating a first analog signal corresponding to said predetermined brightness, a second analog signal ' corresponding to said predetermined first color intensity and a third analog signal corresponding to said predetermined second primary color intensity of each digitally coded word.

Claim 6

A video signal generator as claimed in Claim 4, wherein: said interpolation means includes means for combining said predetermined brightness, said predetermined first primary color intensity and said predetermined second primary color intensity of a picture element of said video scan line with said predetermined brightness, said predetermined first primary color intensity and said predetermined second primary color intensity, respectively, of said corresponding picture element of said delayed video scan line from said delay means.

Claim 7

A video signal generator as claimed in Claim 2, wherein: each of said digitally coded words stored in said memory means comprises one of a set of color codes, each color code representing predetermined first, second and third primary color intensities; and said analog signal generating means includes means for generating a first analog signal corresponding to said predetermined first primary color intensity, a second analog signal corresponding to said predetermined second color intensity and a third analog signal corresponding to said predetermined third primary color intensity of each digitally coded word.

Claim 8

A video signal generator as claimed in Claim 6, wherein: said interpolation means includes means for combining said predetermined first primary color intensity, said predetermined second primary color intensity and said predetermined third primary color intensity of a picture element of said video scan line with said predetermined first primary color intensity, said predetermined second primary color intensity and said predetermined third primary color intensity, respectively, of said corresponding picture element of said delayed video scan line from said delay means.

Claim 9

A video signal generator as claimed in Claim 1, wherein said at least one video attribute includes brightness.

Claim 10

A video signal generator as claimed in Claim 1, wherein said at least one video attribute includes at least one primary color intensity.

Claim 11

A video signal generator as claimed in Claim 1, wherein: said scan line generating means generates a first set of a predetermined number of video scan lines corresponding to a single video frame and then repeats generation of said first set of video scan lines; and said video signal combining means generates a first interlace frame signal for placing said first set of video scan lines in first alternate frame lines during said generation of said first set of video scan lines and generates a second interlace frame signal for placing interpolation scan lines in second alternate frame lines during said repeat generation of said first set of video scan signals.

Claim 12

ll. A video signal generator comprising: a scan line generating means for repetitively generating video scan lines having a predetermined scan line period and including a plurality of picture elements, each picture element having a predetermined picture element period and at least one video attribute; a first picture element delay means connected to said scan line generating means for delaying video scan lines for one picture element period; a scan line delay means connected to said scan line generating means for delaying scan lines for one scan line period; a second picture element delay means connected to said scan line delay means for delaying video scan lines from said scan line delay means for one picture element period; an interpolation means connected to said scan line generating means, said scan line delay means and said first and second picture element delay means for repetitively generating interpolation scan lines by generating picture elements having at least-one video attribute formed by combining said at least one video attribute of picture elements received from said scan line generating means, said first picture element delay means, said scan line delay means and said second picture element delay means; and a video signal combining means connected to said scan line generating means and said interpolation means for generating a video signal including said video scan lines and said interpolation scan lines.

Claim 13

ll. A video signal generator comprising: a scan line generating means for repetitively generating video scan lines having a predetermined scan line period and including a plurality of picture elements, each picture element having a predetermined picture element period and at least one video attribute; a first picture element delay means connected to said scan line generating means for delaying video scan lines for one picture element period; a scan line delay means connected to said scan line generating means for delaying scan lines for one scan line period; a second picture element delay means connected to said scan line delay means for delaying video scan lines from said scan line delay means for one picture element period; an interpolation means connected to said scan line generating means, said scan line delay means and said first and second picture element delay means for repetitively generating interpolation scan lines by generating picture elements having at least-one video attribute formed by combining said at least one video attribute of picture elements received from said scan line generating means, said first picture element delay means, said scan line delay means and said second picture element delay means; and a video signal combining means connected to said scan line generating means and said interpolation means for generating a video signal including said video scan lines and said interpolation scan lines.

Claim 14

A video signal generator as claimed in Claim 4, wherein said scan lines generating means comprises: a memory means for storing a plurality of digitally coded words, each digitally coded word representing said at least one video attribute of a corresponding picture element; a memory controller means connected to said memory for causing said memory to read out digitally coded words in a preselected order corresponding to the order of picture elements in successive video scan lines; and an analog signal generating means connected to said memory means for converting said digitally coded words read out of said memory means into picture elements having at least one video attribute represented by said corresponding digitally coded words.

Claim 15

A video signal generator comprising: a scan line generating means for repetitively generating video scan lines having a predetermined scan line period and including a plurality of picture elements, each picture element having a predetermined picture element period and at least one video attribute; a scan line delay means connected to said scan line generating means for delaying video scan lines for one scan line period; an interpolation means connected to said scan line generating means and said scan line delay means for generating interpolation scan lines, said interpolation means including summing means for summing the video attributes of video scan lines and delayed scan lines from said scan line delay means, summing integrator means having a first input connected to the output of said summing means, a second input and an output which is an integral over a time interval approximating the picture element period of video attributes, said output being said interpolation lines and a picture element delay means having an input connected to the output of said summing integrator means and an output which is delayed one picture element period connected to said second input of said summing integrator means; and a video signal combining means connected to said scan line generating means and said interpolator means for generating a video signal including said video scan lines and said interpolation scan lines.

Claim 16

A video signal generator comprising: a scan line generating means for repetitively generating video scan lines having a predetermined scan line period and including a plurality of picture elements, each picture element having a predetermined picture element period and at least one video attribute; a scan line delay means connected to said scan line generating means for delaying video scan lines for one scan line period; an interpolation means connected to said scan line generating means and said scan line delay means for generating interpolation scan lines, said interpolation means including summing means for summing the video attributes of video scan lines and delayed scan lines from said scan line delay means, summing integrator means having a first input connected to the output of said summing means, a second input and an output which is an integral over a time interval approximating the picture element period of video attributes, said output being said interpolation lines and a picture element delay means having an input connected to the output of said summing integrator means and an output which is delayed one picture element period connected to said second input of said summing integrator means; and a video signal combining means connected to said scan line generating means and said interpolator means for generating a video signal including said video scan lines and said interpolation scan lines.

Claim 17

A video signal generator as claimed in Claim 13, wherein said scan lines generating means comprises: a memory means for storing a plurality of digitally coded words, each digitally coded word representing said at least one video attribute of a corresponding picture element; a memory controller means connected to said memory for causing said memory to read out digitally coded words in a preselected order corresponding to the order of picture elements in successive video scan lines; and an analog signal generating means connected to said memory means for converting said digitally coded words read out of said memory means into picture elements having at least one video attribute represented by said corresponding digitally coded words.