Color television system

Claim 2

In a color television system the combination of: camera means for scanning a color image; filter means disposed between said camera means and said color image including a luminance portion for translating all of said color image to said camera means during a first field of scan thereof, and a color filter portion for translating respectively first and second primary colors of said color image in each line of scan to said camera means during a second field of scan, said camera means providing luminance video signals during said first field and bicolor video signals during said second field; means for providing frame reference pulses defining the beginning of each frame of scan; sync generating means for providing synchronizing information for controlling the synchronization of said camera means and said filter means; and means for combining said luminance video signals, said bicolor video signals, synchronizing information from said sync generating means and said frame reference pulses to provide a composite video output.

Claim 3

The combination of claim 1 includes: clamping means for clamping said luminance and bicolor video signals to a reference level at the beginning of each line of scan; and means for down-gamma processing said luminance and bicolor video signals prior to application to said means for combining.

Claim 4

The combination of claim 1 wherein: said color filter portion of said filter means includes a first plurality of color filters responsive to one of said primary colors and a second plurality of color filters responsive to the other of said primary colors, said first and second portions are alternately disposed so that said two primary colors are alternately scanned in each line by said camera means.

Claim 5

The combination of claim 3 wherein: said filter means comprises a filter wheel wherein said luminance portion comprises one semicircular sector of said wheel and said color filter portion comprises the other semicircular sector wherein said first and second pluralities comprise semicircular strips, said color filter portion further includes opaque semicircular strips disposed between adjacent strips of said first and second pluralities to block said color image from said camera means.

Claim 6

The combination of claim 1 includes: means for transmitting said composite video signals; receiver means for receiving said transmitted composite video signals and recovering said composite video signals; gating means responsive to said frame reference signals and said synchronizing information in said composite video signals for translating said luminance video signals during said first frame and said bicolor video signals during said second frame; first processing means for processing said luminance video signals; means for extracting from said processed bicolor video signals first and second primary color video signals corresponding to said first and second primary colors; and means for receiving said processed luminance signals and said first and second primary color video signals and providing in response thereto third primary color video signals corresponding to the third primary color.

Claim 7

The combination of claim 5 wherein: said first processing means includes delay means for delaying said luminance signals for apprOximately one field and adding means for adding said luminance signals which are not delayed to said delayed luminance signals to provide said processed luminance signals; and said second processing means includes delay means for delaying said bicolor signals for approximately one field and adding means for adding said bicolor signals which are not delayed to said delayed bicolor signals to provide said processed bicolor signals.

Claim 8

The combination of claim 6 wherein: said means for extracting includes first and second sampling means for receiving said processed bicolor signals, and pulse generating means responsive to said processed bicolor signals for generating first and second sampling pulses for application to said first and second sampling means respectively so that said first and second primary color video signals are respectively provided from said first and second sampling means.

Claim 9

The combination of claim 5 includes: clamping means for clamping said luminance and bicolor video signals to a reference level at the beginning of each line of scan; means for down-gamma processing said luminance and bicolor video signals prior to application to said means for combining so that said transmitted luminance and bicolor video signals are down-gamma processed; said first processing means includes means for up-gamma processing said luminance signals that had previously been down-gamma processed to provide said luminance video signals, said means for extracting includes means for up-gamma processing said first and second primary color video signals extracted from said bicolor signals that had previously been down-gamma processed to provide said first and second primary color video signals.

Claim 10

The combination of claim 8 includes: means for bandwidth limiting said luminance signals provided by said means for up-gamma processing to provide bandwidth limited luminance signals; means for bandwidth limiting said down-gamma processed first primary color video signals so as to provide bandwidth limited down-gamma process first primary color video signals and bandwidth limited first primary color signals; means for bandwidth limiting said down-gamma processed second primary color video signals so as to provide bandwidth limited down-gamma processed second primary color video signals and bandwidth limited second primary color video signals; said means for receiving responsive to said bandwidth limited luminance video signals and said bandwidth limited first and second primary color video signals to provide bandwidth limited third primary color video signals; means for down-gamma processing said bandwidth limited third primary color video signals; means for providing low frequency luminance video signals in response to said bandwidth limited first, second and third primary color video signals; means for down-gamma processing said low frequency luminance video signals; means for substracting said down-gamma processed low frequency luminance video signals from said down-gamma processed luminance video signals to provide down-gamma processed high frequency luminance video signals; and means for combining said down-gamma processed high frequency luminance video signals respectively with said bandwidth limited down-gamma processed first, second and third primary color video signals to provide wide bandwidth down-gamma processed first, second and third primary color video signals respectively.