Television signal scanning line converting apparatus

Claim 2

A television signal scanning line converting apparatus comprising: a delivering means comprising an adding means for obtaining a resolution component by determining the sum before and after a frame to which an input progressive scanning signal is given; a subtracting means for obtaining a motion component by determining the difference between before and after the frame to which the input progressive scanning signal is given and a band limiting means for limiting the horizontal and vertical bands of the motion component and delivering the motion component together with the resolution component; and a receiving means for converting an interlaced scanning signal from the delivering means to a progresssive scanning signal.

Claim 3

A television signal scanning line converting apparatus comprising: an adding means for obtaining a resolution component by determining the sum before and after a frame to which an input progressive scanning signal is given; a subtracting means for obtaining a motion component by determining the difference between before and after the frame to which the input progressive scanning signal is given; and a band limiting means for limiting the horizontal and vertical bands of the motion component, limiting the diagonal band of said resolution component and delivering them.

Claim 4

A television signal scanning line converting apparatus comprising: an adding means for obtaining a resolution component by determining the sum before and after a frame to which an input progressive scanning signal is given; a subtracting means for obtaining a motion component by determining the difference between before and after the frame to which the input progressive scanning signal is given; a first band limiting means for limiting the horizontal and vertical bands of the motion component; a second band limiting means for limiting the diagonal band of the resolution component; a still picture mode delivering means for converting the movtion component from the first band limiting means and the resolution component from the adding means to an interlaced scanning signal in case the input progressive scanning signal is a still picture and delivering the interlaced scanning signal; and a moving picture mode delivering means for limiting in the band the motion component from the first band limiting means in case the input progressive scanning signal is a moving picture, converting the motion component together with the resolution component from the second band limiting means to an interlaced scanning signal and delivering the interlaced scanning signal.

Claim 5

A television signal scanning line converting apparatus according to claim 4 wherein the moving picture mode delivering means multiplexes separately the band limited by the first band limiting means and delivers it.

Claim 6

A television signal scanning line converting apparatus according to any one of claims 4 and 5 wherein the first band limiting means will make the horizontal and vertical transmitting bands substantially 1/2 in case the still picture mode delivering means and moving picture mode delivering means delilver television signals of an NTSC system.

Claim 7

A television signal scanning line converting apparatus comprising: a scanning line converting means for outputting a first progressive scanning signal of a frame frequency of 1/2 that of an input progressive scanning signal when the input progressive scanning signal is given and a sum operation is made before and after the frame and for outputting a second progressive scanning signal of a frame frequency of 1/2 that of the input progressive scanning signal when a difference operation is made before and after the frame; a still picture mode processing means having a delaying circuit delaying the first progressive scanning signal for one frame period and outputting the first progressive scanning signal and the delaying signal as separated respectively into the first field and second field; a first interlacing converting means for outputting a moving picture resolution signal obtained by removing a high vertical space frequency range component of the first progressive scanning signal and a delayed signal obtained by delaying this moving picture resolution signal for one frame period as separated respectively into the first field and second field; a second interlacing converting means for outputting a motion component obtained by removing the high vertical space frequency range component of the second progressive scanning signal and a delayed turned signal obtained by delaying this motion component for one frame period and turning the polarity as separated into the first field and second field; a moving picture mode processing means for outputting the first interlacing converting means output and the second interlacing converting means output as added; and a switching means for selectively delivering the output of the still picture mode processing means and the output of the moving picture mode processing means in conformity with the motiion of the image.

Claim 8

A television signal scanning line converting apparatus comprising: a scanning line converting means for converting an input progressive scanning signal to a progressive scanning signal of 1/2 the frame frequency and outputting the progressive scanning signal; a vertical space frequency separating filter separating the progressive scanning signal into a high vertical space frequency range component and low vertical space frequency range component; a moving picture mode processing means for shifting a vertical space frequency by turning the polarity on each scanning line for the high vertical space frequency range component, shifting the temporal space frequency by turning the polarity in each field, then adding them to a field repeating component of the low vertical space frequency range component and outputting them; a still picture mode processing means for outputting a field repeating signal of a progressive scanning signal from the scanning line converting means; and a switching means for selectively outputting the outut of the moving picture mode processing means and the output of the still picture mode processing means in conformity with the motion.

Claim 9

A television signal scanning line converting apparatus comprising: a scanning line converting means having memories memorizing respectively the first and second field signals of an input interlaced scanning signal, reading out alternately the memorized first and second field signals on each scanning line and outputting a progressive scanning signal of the same frame frequency as of the interlaced scanning signal; a vertical space frequency separating filter separating the progressive scanning signal into a low vertical space frequency range component and high vertical space frequency range component; a vertical space frequency shifting means for turning the polarity of the high vertical space frequency range component on each scanning line; a first adder adding the output of the vertical space frequency shifting means and the low vertical space fraequency range component; a polarity turning circuit turning the polarity of the output of the vertical space frequency shifting means. a second adder adding the output of the polarity turning circuit and the low vertical space frequency range component; a motion detecting circuit judging whether the interlaced scanning signal is a still picture or a moving picture and outputting a judging signal; a first and second switching means respectively selecting a progressive scanning signal from the scanning line converting means at the time of a still picture controlled by the judging signal and selecting the first and second adder outputs at the time of a moving picture and outputting them; a first time compressing circuit compressing the time of the output of the first switching circuit and outputting the output; a delaying circuit delaying the output of the second switching circuit; a second time compressing circuit compressing the time of the output of the delaying circuit and outputting the output; and a switch alternately outputting the outputs of the first and second time compressing circuits in each field.