Crosstalk reduction in color reproduction system

Claim 2

In a system for reproducing a color image from composite signals having signal components formed from spatial modulations of a first color in a first line pattern and spatial modulations of a second color in a second line pattern having a directional orientation different from the first line pattern and with the spatial modulations of the first and second colors at the same frequency and wherein the composite signals are formed from a scanning of the image in successive lines, means for operating upon the signals representing the composite image to recover from such signals the signal components representing first and second adjacent lines of scan, means for averaging the signal components over a plurality of cycles of modulation in at least one of the first and second lines of scan, and means for operating upon the signal components representing the first and second lines of scan and including the averaged line of scan to obtain a reproduction of the first and second colors with a reducing of luminance/chrominance crosstalk.

Claim 3

The system of claim 1 wherein the means for averaging the signal components over a plurality of cycles of modulation includes a delay line tapped at one cycle intervals.

Claim 4

The system of claim 1 wherein the signal components are averaged over three cycles.

Claim 5

The system of claim 1 wherein both of the first and second adjacent lines of scan are averaged over a plurality of cycles of modulation.

Claim 6

In a system for reproducing a color image from composite signals having signal components formed from spatial modulations of a first color in a first line pattern and spatial modulations of a second color in a second line pattern having a different angular relationship from the first line patterns where the composite signals represent periodic phase relationships between the two modulators in first and second successive line intervals taken in a direction different from either modulator; means responsive to the composite signals representing at least one of the first and second successive line intervals for averaging the composite signals over a plurality of cycles of modulation in the one line interval; electronic means responsive to the relative phase of the composite signals representing at least one averaged line and the other line forming the successive line intervals of the composite image to recover from such signals the signal component representing the first color; electronic means responsive to the relative phase of the composite signals representing at least one averaged line and the other line forming the successive line intervals of the composite image to recover from such signals the signal components representing the second color; and means for operating upon the signals representing the first and second colors to obtain a reproduction of the color image.

Claim 7

In a system for reproducing a color image from composite signals having signal components formed from spatial modulations of a first color in a first line pattern and spatial modulations of a second color in a second line pattern having a different angular relationship from the first line patterns where the composite signals represent periodic phase relationships between the two modulators in first and second successive line intervals taken in a direction different from either modulator; means responsive to the composite signals representing at least one of the first and second successive line intervals for averaging the composite signals over a plurality of cycles of modulation in the one line interval; electronic means responsive to the relative phase of the composite signals representing at least one averaged line and the other line forming the successive line intervals of the composite image to recover from such signals the signal component representing the first color; electronic means responsive to the relative phase of the composite signals representing at least one averaged line and the other line forming the successive line intervals of the composite image to recover from such signals the signal components representing the second color; and means for operating upon the signals representing the first and second colors to obtain a reproduction of the color image.

Claim 8

The system of claim 5 wherein the means for averaging the composite signals over the plurality of cycles of moduLation includes a delay line tapped at one cycle intervals.

Claim 9

The system of claim 6 additionally including a delay line for compensating for the tapped delay line and with the compensating delay line having a delay of n/2f where n is the number of cycles averaged over and f is the frequency of modulation.

Claim 10

The system of claim 5 wherein both of the first and second successive line intervals are averaged over a plurality of cycles of modulation.

Claim 11

In combination in a system for reproducing a color image from composite signals including signal components of a first color spatially modulated in a first line pattern and signal components of a second color spatially modulated in a second line pattern having a different angular relationship from the first line pattern where the composite signal represents first and second successive line intervals on the composite image and where the signal components produced from the modulations of the first color have a first phase relationship in successive lines of scan and where the signal components produced from the modulations of the second color have a second phase relationship different from the first phase relationship in the successive scan lines; means for recovering the composite signal in the successive line intervals; means responsive to the composite signal in the successive line intervals for averaging the composite signal of at least one of the first and second successive line intervals over a plurality of cycles of modulation to form an averaged composite signal; first means responsive to the averaged composite signal and the composite signal for passing the signal components having the first phase relationship in the successive lines of scan to obtain the recovery of the signal components representing the second color in the color image; electronic means responsive to the composite signal to produce signal components representing the luminance of the color image; electronic means responsive to the signal components representing the first and second colors and the luminance to produce signal components representing the third color; and means for operating upon the signal components representing the first, second and third colors and the luminance to reproduce the color image.

Claim 12

In combination in a system for reproducing a color image from composite signals including signal components of a first color spatially modulated in a first line pattern and signal components of a second color spatially modulated in a second line pattern having a different angular relationship from the first line pattern where the composite signal represents first and second successive line intervals on the composite image and where the signal components produced from the modulations of the first color have a first phase relationship in successive lines of scan and where the signal components produced from the modulations of the second color have a second phase relationship different from the first phase relationship in the successive scan lines; means for recovering the composite signal in the successive line intervals; means responsive to the composite signal in the successive line intervals for averaging the composite signal of at least one of the first and second successive line intervals over a plurality of cycles of modulation to form an averaged composite signal; first means responsive to the averaged composite signal and the composite signal for passing the signal components having the first phase relationship in the successive lines of scan to obtain the recovery of the signal components representing the second color in the color image; electronic means responsive to the composite signal to produce signal components representing the luminance of the color image; electronic means responsive to the signal components representing the first and second colors and the luminance to produce signal components representing the third color; and means for operating upon the signal components representing the first, second and third colors and the luminance to reproduce the color image.

Claim 13

The system of claim 9 wherein the means for averaging the composite signal over the plurality of cycles of modulation includes a delay line tapped at one cycle intervals.

Claim 14

The system of claim 10 additionally including a delay line for compensating for the tapped delay line and with the compensating delay line having a delay of n/2f where n is the number of cycles averaged over and f is the frequency of modulation.

Claim 15

The system of claim 9 wherein both of the first and second successive line intervals are greased over a plurality of cycles of modulation.

Claim 16

In combination in a system for reproducing a color image from a composite image having a first color spatially modulated in a first line pattern and a second color spatially modulated in a second line pattern having a different angular relationship from the first line pattern and where the composite image is obtained from successive lines of scan of the color image and where, when scanned, the modulations of the first color in the successive lines of scan have a different phase relationship from the modulations of the second color in the successive lines of scan; first means for scanning the composite image in the successive lines of scan to produce signals representing the composite image in the successive lines of scan and having signal components modulated in accordance with the first and second line patterns and representing the first and second colors; second means responsive to the signals representing the composite image to produce signal components representing the luminance of the color image; third means responsive to the signals representing the composite image in the succeSsive lines of scan for producing signals representing first and second successive lines of scan and with the signals of at least one of the first and second successive lines averaged over a plurality of cycles of modulation, fourth means responsive to the signals representing the first and second successive lines of scan for operating upon the modulations in the first line pattern in accordance with the first phase relationship in the first and second successive lines of scan to recover the signal components representing the first color; fifth means responsive to the signals representing the first and second successive lines of scan for operating upon the modulations in the second line pattern in accordance with the second phase relationship in the first and second successive lines of scan to recover the signal components representing the second color; and sixth means responsive to the signal components representing the first and second colors and the luminance for reproducing the color image.

Claim 17

In combination in a system for reproducing a color image from a composite image having a first color spatially modulated in a first line pattern and a second color spatially modulated in a second line pattern having a different angular relationship from the first line pattern and where the composite image is obtained from successive lines of scan of the color image and where, when scanned, the modulations of the first color in the successive lines of scan have a different phase relationship from the modulations of the second color in the successive lines of scan; first means for scanning the composite image in the successive lines of scan to produce signals representing the composite image in the successive lines of scan and having signal components modulated in accordance with the first and second line patterns and representing the first and second colors; second means responsive to the signals representing the composite image to produce signal components representing the luminance of the color image; third means responsive to the signals representing the composite image in the succeSsive lines of scan for producing signals representing first and second successive lines of scan and with the signals of at least one of the first and second successive lines averaged over a plurality of cycles of modulation, fourth means responsive to the signals representing the first and second successive lines of scan for operating upon the modulations in the first line pattern in accordance with the first phase relationship in the first and second successive lines of scan to recover the signal components representing the first color; fifth means responsive to the signals representing the first and second successive lines of scan for operating upon the modulations in the second line pattern in accordance with the second phase relationship in the first and second successive lines of scan to recover the signal components representing the second color; and sixth means responsive to the signal components representing the first and second colors and the luminance for reproducing the color image.

Claim 18

The system of claim 13 wherein the third means includes a tapped delay line providing a plurality of outputs and with a summing of the outputs providing the averaging of at least one of the first and second successive lines over the plurality of cycles of modulation.

Claim 19

The system of claim 14 additionally including a compensation delay line for delaying the other of the first and second successive lines for a period to compensate for the tapped delay line and with the compensating delay line having a delay of n/2f where n is the number of cycles averaged over and f is the frequency of modulation.

Claim 22

The method of claim 16 wherein the step of averaging the signals over a plurality of cycles of modulation includes summing a plurality of outputs from a tapped delay line.

Claim 23

The method of claim 17 additionally including the step of compensation for the delay provided by the tapped delay line.

Claim 24

In a method of producing a composite image of a color image and reproducing the composite image from the color image wherein the color image is scanned in successive lines to produce composite signals representing the color image and wherein the composite signals are produced by first and second filters which are provided in first and second particular line patterns to control the passage of modulated signals representing first and second particular colors in accordance with the first and second particular line patterns, including the steps of: operating upon the composite signals to recover the modulated signals representing a first line of scan; operating upon the composite signal to recover the modulated signals representing a second successive line of scan; operating upon the modulated signals representing one of the first and second lines of scan to average the modulated signals of the one line of scan over a plurality of cycles of modulation; operating upon the modulated signals of the one averaged line of scan and the other line of scan to recover the signals representing the first color; operating upon the modulated signals of the one averaged line of scan and the other line of scan to recover the signals representing the second particular color; operating upon the signals representing the composite image to produce signals representing the luminance of the color image; operating upon the signals representing the first and second particular colors and the luminance to reproduce the color image.

Claim 25

In a method of producing a composite image of a color image and reproducing the composite image from the color image wherein the color image is scanned in successive lines to produce composite signals representing the color image and wherein the composite signals are produced by first and second filters which are provided in first and second particular line patterns to control the passage of modulated signals representing first and second particular colors in accordance with the first and second particular line patterns, including the steps of: operating upon the composite signals to recover the modulated signals representing a first line of scan; operating upon the composite signal to recover the modulated signals representing a second successive line of scan; operating upon the modulated signals representing one of the first and second lines of scan to average the modulated signals of the one line of scan over a plurality of cycles of modulation; operating upon the modulated signals of the one averaged line of scan and the other line of scan to recover the signals representing the first color; operating upon the modulated signals of the one averaged line of scan and the other line of scan to recover the signals representing the second particular color; operating upon the signals representing the composite image to produce signals representing the luminance of the color image; operating upon the signals representing the first and second particular colors and the luminance to reproduce the color image.

Claim 26

The method of claim 19 wherein the step of averaging the modulated signals over a plurality of cycles of modulation includes summing a plurality of outputs from a tapped delay line.

Claim 27

The method of claim 20 additionally including the step of compensating for the delay provided by the tapped delay line. 22 In a method of producing a composite image of a color image and reproducing the composite image from the color image wherein the color image is scanned in successive lines to produce composite signals representing the color image and wherein the composite signals are produced by first and second filters which are provided in first and second particular line patterns to control the passage of modulated signals representing first and second particular colors in accordance with the first and second particular line patterns, including the steps of: operating upon the composite signals to average the modulated signals over a plurality of cycles of modulations, operating upon the composite signal to recover the modulated signals representing first averaged line of scan; operating upon the composite signal to recover the modulated signals representing a second successive averaged line of scan; operating upon the modulated signals of the first averaged line of scan and the second averaged line of scan to recover the signals representing the first color; operating upon the modulated signals of the first averaged line of scan and the second averaged line of scan to recover the signals representing the second particular color; operating upon the signals representing the composite image to produce signals representing the luminance of the color image; operating upon the signals representing the first and second particular colors and the luminance to reproduce the color image.

Claim 28

The method of claim 22 wherein the step of averaging the signals over a plurality of cycles of modulation includes summing a plurality of outputs from a tapped delay line.