Video transfer method using time-spaced interleaved fields

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The basic film to video transfer process of the present invention is best understood by referring to FIG.
1.
This represents the upper left hand corner of a television display in which a dark capital letter A is presented against a bright background.
A close inspection of the television screen will reveal that the letter is not actually solid, but rather is composed of a series of horizontal scan lines which are modulated ON and OFF to form the desired image.
Although ten lines are shown in the figure for simplicity, current conventional television images comprise over 500 lines, and future high definition television images are expected to comprise over 1,000 lines.
The darker areas of the lines 2 represent areas where the television CRT electron beam has been turned off, with the result that no light comes from the television screen in these areas.
The lines are divided into two fields, one of odd numbered lines and the other of even numbered lines.
With conventional interleaved video, the field of odd numbered lines is first scanned across the screen, followed by the field of interleaved even numbered lines.
The scanning is performed rapidly enough, typically at a rate of 30 frames (60 fields) per second, so that the viewer perceives a continuous and complete image.
The manner in which the present invention transfers the images of a movie film onto videotape so as to substantially eliminate the image jumping and smearing problem encountered with the referenced 3-D method is illustrated in FIG.
2.
A strip of movie film 4 is shown as consisting of a series of successive frames 6, each presenting a still image.
The film is organized into successive film units of two frames each, the first film unit consisting of the frames numbered 1 and 2, the second film unit of frames 3 and 4, etc.
Each of the film units is transferred onto a single corresponding frame of a videotape 8.
The odd numbered lines of the first frame within each film unit are used for the first field of lines within the corresponding video frame, while the even numbered lines from the second frame within each film unit are used for the second field of lines in the corresponding video frame, the first and second video fields being interleaved with each other