Abstract: A still picture reproducing apparatus is provided with means for reproducing still picture information having a 4-field sequence of NTSC system from a recording medium such as a magnetic disc, with the time base of reproduced still picture information being extended from the time base of a normal video signal. A memory is provided for storing reproduced still picture information of four fields. The memory is controlled for reading out the contents therein, with picture information being compressed in time so that the normal time base is restored. A color framing circuit is provided for producing an NTSC color video signal having the 4-field sequence from a memory output for at least one field. The output from said color framing circuit and the output for four fields from said memory are changed-over in order by a switch circuit.

Abstract: In a system for enhancing horizontal detail of a luminance signal, a horizontal peaking signal to be added to the luminance signal is cored with the depth of coring varied in accordance with a coring control potential. To develop the coring control potential, the input luminance signal is capacitively coupled to the input of a signal translator comprising an inverting amplifier with a frequency selective negative feedback path providing the translator with a low pass characteristic and a signal delay substantially equal to the delay of a delay line employed in peaking signal formation. An additional feedback path is provided by the emitter-collector path of a clamping transistor that conducts in response to sync pulse appearances to readjust the charge on the input capacitor, clamping the sync pulse peaks to a potential selected to establish a desired coring depth for black scene regions. Amplifier gain is set to provide translator output swing establishing a desired minimum coring depth (e.g.

Abstract: A Color Separator for a Map Display Video Generator utilizing a Fresnel lens to expand a multicolor light signal output from a point of light scanned map film to a stationary area that entirely fills an input end of a bundle of optical fibers the other end of which bundle is divided into three smaller bundles. The light output from each smaller bundle is first passed through a colored filter to thereby separate the light into the primary colors red, green and blue. The separated light is then converted to an electrical signal by photomultipliers and used to generate a color video signal applied to a color cathode ray tube display to display the map thereon.