JPS6038915B2 - Television image plate making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plate-making apparatus, particularly a color television image plate-making apparatus for producing printing plates for color television Z images.

As the content of television programs has expanded, there has been a need to record desired images from television images as photographs or prints, and to reproduce them in large quantities.

Conventionally, when mass duplicating television images by printing, the television images are photographed using, for example, a steel camera, and the color photographs are made into color photographs.This color photograph is then run through a plate-making machine to create a printing plate, and this printing plate is used to reproduce the television images. A large amount of copying is carried out. However, the color temperature of a television image projected on a color fluoroun tube is usually around 9000K, and even red (R).
It emits three types of light, green (G) and blue (B), so although it looks good to the naked eye, it does not match the sensitivity distribution of the photographic emulsion, so it is difficult to see the television projected on the CRT surface. A satisfactory color photograph cannot be obtained by simply converting the color temperature by color photographing the image. Further, a television image is composed of 525 scanning lines regardless of the size of the screen, and has poor image quality among commonly used images. Furthermore, because the printing process has to be done again after making a color photograph, the actual printed television image has poor resolution, hue, gradation, etc.
It has deteriorated considerably. Therefore, an object of the present invention is to provide a television image plate making apparatus that does not deteriorate the resolution, hue, gradation, etc. of television images.

According to the present invention, a video signal corresponding to one desired frame is read out from a video tape recorder that has recorded a television video signal, and an intermediate scanning line is added between each scanning line to substantially increase the number of scanning lines. A television image plate-making device is provided that produces color separation plates and the like by converting the three primary color signals into three primary color signals and supplying the three primary color signals to an electronic plate-making device such as a color scanner.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a circuit of a plate making apparatus according to an embodiment of the present invention.

In this figure, video tape recorder (VTR) 1 1
is supplied with an NTSC television signal. As the video tape recorder 11, a 1-inch or 2-inch professional video tape recorder is used. In addition, this video tape recorder should preferably be capable of slow playback and still playback in order to select frames as a manuscript for plate making. A frame number generator 12 and a starting frame number indicator 13 are coupled to the video tape recorder 11 . A monitor television 14 and a frame memory 5 are connected to the playback output of the video tape recorder 11. The frame memory 15 is configured so that frame signals can be written and output in response to a recording or reading control signal from a recording/output control signal generation circuit 16. The recording/display control signal generation circuit 16 generates a recording control signal in synchronization with the synchronization signal from the television synchronization signal generator 17.
A frequency divider 18 that divides the frequency of the synchronization signal into 1/n (n: integer)
A delivery control signal is generated in synchronization with the frequency-divided signal from.
A playback (display) output of the frame memory 15 is connected to a switch circuit 19. This switch circuit 19 is controlled by a trimming signal generated from a trimming signal generator 20 in synchronization with the frequency division signal of the frequency divider 18. That is, in this switch circuit 19, the television image is trimmed as desired, and a video signal corresponding to the trimmed image is output from the switch circuit 19. switch circuit 1
The output of 9 is coupled to a monitor television 21 and a switch circuit 22. The switch circuit 22 is a logic circuit 23
1 via the switch circuit 19 according to the control signal from
Odd field scanning line signals and even field scanning line signals of a frame video signal are taken out alternately and in accordance with the order of the scanning lines. The output end of this switch circuit 22 is connected to a memory 30. The memory 30 performs recording or reading according to a control signal from the recording/output control signal generating circuit 27. The recording/output control signal generating circuit 27 generates a control signal in response to the output of the logic circuit 23, and the read timing is adjusted by the read time setter 28. The IH scanning line signal stored in the memory 30 is read out under the control of the signal generation circuit 27 and supplied to the memory 36, the intermediate scanning line generation device 35, and the distribution circuit 31. The scanning line signal received in the memory 36 is stored in the memory 36 and then read out and connected to the NTSC decoder 39. The distribution circuit 31, memories 32, 33, switch circuit 34, and intermediate scanning line generator 35 are for generating a virtual intermediate scanning line signal between two adjacent scanning line signals. The scanning line signals supplied to the distribution circuit 31 are alternately stored in either the memory 32 or the memory 33 by the distribution circuit 31, and in this embodiment, the scanning line signals of odd fields are stored in the memory 32 or the memory 33. In addition, even field scanning line signals are stored in memory 3.
3 is stored. The scanning line signal stored in the memory 32 or 33 is selected by a switch circuit 34 and coupled to an intermediate scanning line signal generator 35. Intermediate scanning line generator 3
5 synthesizes an intermediate virtual scanning line signal from the scanning line signal from the memory 30 and the scanning line signal from the switch circuit 34. In this embodiment, the intermediate scanning line generator 35 outputs the average value of the two input scanning line signals.
It is configured. The output of the intermediate scanning line generator 35 is NT
Supplied to the SC decoder.

As mentioned above, the scanning line signals stored in the memory 36 are sent to the NTSC decoder 3 under the control of the control signal generation circuit 27.
9.

Next, an intermediate scanning line signal between that scanning line signal and the next (adjacent) scanning line synthesized by the intermediate scanning line generator 35 is supplied to the NTSC decoder 39. Next, memory 3
The next scan line signal stored in 6 is supplied to the NTSC decoder 39. In this way, the intermediate scanning line signal combined with the scanning line signal is sequentially supplied to the NTSC decoder 39. This NTSC decoder 39 has a function of converting the supplied field video signal into three primary color signals R, G, and B.

The output of the NTSC decoder is connected to a plate making device 40. In the embodiment of the plate-making device Makoto Yotsukawa, it is a color scanner, which converts the R, G, and B signals provided by the plate into Y, M,
a color calculation device 41 that converts into C and BK signals and applies correction;
A correction circuit 42 for making necessary corrections such as gradation correction, Y, M,
It consists of an exposure device 43, etc., which performs exposure while scanning the C and BK signals to obtain separated Y, M, C and BK plates.

This exposure device 43 is configured to operate in synchronization with the frequency-divided signal from the frequency divider 18. Next, the operation of the television image plate making apparatus of the present invention will be explained based on the circuit shown in FIG.

When an NTSC television signal is supplied to the video tape recorder 11, this television signal is recorded on the VTRI I in synchronization with the synchronization signal from the synchronization signal generator 17. At that time, frame number information from the frame number generation circuit 12 is recorded for each frame. Note that this frame number information is preferably stored in unused audio tracks. When reading a desired frame from a VTRII that has recorded a television signal, the desired frame number is set by the output frame number indicator 13, and the VTRII is operated for reproduction. VTRI
The reproduced signal of I is supplied to the monitor television 14 and visualized. Also, during this reproduction, frame number information is read from the VTRII and compared with the set frame number information. When frame video signals corresponding to the set frame number information are successively output, a storage control signal is output from the storage/argument control signal generation circuit 16 to give a storage command to the frame memory 15. As a result, the frame video signal of the set frame number is stored in the frame memory 15. Although the frame memory 15 may be constructed from an analog magnetic disk memory or a digital solid state memory IJ, a magnetic disk memory is used in this embodiment. This magnetic disk memory stores video signals in the format shown in FIG. One frame of television image is formed by 525 scanning lines and consists of odd and even fields.

1-20 and 263-283 for frame images
It has a vertical blanking period of , and a horizontal synchronizing signal h is included between scanning lines (see FIG. 3). Incidentally, the odd field is defined by scanning lines 21 to 2 as shown in FIGS. 2 to 4.
63, and the even field consists of scanning lines 283 to 52.
Consists of 5. When reading a video signal from the frame memory 15 shown in FIG. 2, the order of the scanning lines in FIG. 4 corresponds to the even field scanning line 283, the odd field scanning line 21, the even field scanning line 284, etc.
. . , even-numbered fields, and odd-numbered fields are read out alternately and sequentially.

In this arrangement, the magnetic disk memory rotates at a constant speed, and a magnetic head (not shown) outputs video signals corresponding to the scanning lines in the order described above. The output of the signals in accordance with the above-mentioned order is performed by controlling the opening and closing of the switch circuit 22 using a control signal from the logic circuit 23. The output of this switch circuit 22 is IH
The memory 301 is stored. In Fig. 5, the memory 30, 3
Storage and readout timings are shown at 2, 33, and 36,
Additionally, the input signal to the NTSC decoder 39 is shown.

As shown in the figure, the logic circuit 23 and control signal generator 27 control the switch circuit 22, distribution circuit 31, switch circuit 34, memories 30, 32, 33, 36, etc. The signals of the scanning lines 21, 21 and 284, 284, . . . are sequentially supplied with a V voltage. Furthermore, when supplying the scanning line signal and intermediate scanning line signal to the NTSC decoder, it is necessary to determine the write and read timings in consideration of the exposure time by the scanner.

The exposure time of a scanner is determined by the sensitivity of the film mounted on the scanner drum and the intensity of light, but this exposure time is insufficient for the scanning time of a television signal. Therefore, it is necessary to read out the video signal at a timing several times slower than the scanning time. This read timing is determined by setting the frequency division ratio of the frequency divider 18 to an appropriate value. In this embodiment, if the frequency division ratio is n, the write logic output time can be set as follows. That is, if the writing time to the memory 30 is w, then w = house x pot 5 x n [seconds], and the time that the memory 30 can be used, that is, the time A until the next signal arrives, is A = longevity.

X damage x n [seconds].

Since the number of scanning lines is 1050 including the number of intermediate scanning lines, the time R that can be used for discussion is O<R<A/2.

Printing yellow plate Y, red plate M, black plate C, and black plate BK of the scanner shown in FIG. 6 are mounted on the exposure cylinder 44 side by side in a line.

Note that the 1050 scanning lines correspond to the Y direction (rotation direction). When the diameter of the cylinder 44 is S (side), the circumferential length L of the cylinder is L=mS. If the horizontal dimension of the screen to be made is Y (side), then the reading time R from the memory 30 can be found from Y:L=R:A/2, where R=total XY.

However, A is the time required for two rotations of the scanner cylinder. The rotational speed of the scanner cylinder, the exposure time, and the frequency division ratio are determined so as to satisfy the above calculation formula.
Writing/reading of the memory 30 is performed by a control signal generated from the storage/output control signal generation circuit 27 at the timing determined as described above. Note that the issue time can be adjusted to a specified value by adjusting the read time setting device 28. The scan line signal from the memory 36 and the intermediate scan line signal from the intermediate scan line generator 35 are sequentially N
Three primary color signals R, G,
It is converted to B. The three primary color signals R, G, B are sent to the plate making device 4.
The R, G, B/Y, M, C, BK converter 41 converts the signals into Y, M, C, and BK signals necessary for printing.

Y, M, C, and BK are subjected to various corrections such as gradation and hue by a correction circuit 42 and then supplied to an exposure device 43. In the exposure device 43, the Y, M, C, and BK signals are converted into light intensities and reproduced as optical images on color separation films of Y, M, C, and BK plates shown in FIG. In a specific embodiment, for example, when a DS scanner is used, the frequency division ratio n is preferably n=10.

From the frequency division ratio n=10, the writing time W is w = Kotobuki.

X value 5 ), plate making dimensions are 3
00×400 (fence), LnimS=47I,2 [
side] The reading time R from the IH memory 30 is.

-△V-83-Morozakura-3×4oo-7o-9 [mS] 1
・-Mountain 11, satisfying 0<R<A/2.

The time required to expose the film is about 1 minute and 2 minutes. In addition, the screen size for printing can be freely adjusted within a certain range.

The range can be found from the above formula: 0<Y<L. In this case, the meeting time will differ depending on the screen size, but this can be set in the meeting time setting 28 shown in Figure 1. .

At this time, there is no change in the rotation speed of the cylinder or the exposure time. As explained above, according to the present invention, a television signal is fed to a plate-making device such as a scanner, and plate-making is performed using the television signal, so that plate-making can be performed without impairing resolution, gradation, and hue.

In addition, when a television signal is supplied to a plate-making device, the number of scanning lines of the television signal is 525, but by combining virtual scanning line signals in the middle, the number of scanning lines can be substantially increased. It becomes possible to hide and print. still,
In the embodiment described above, an embodiment has been described in which one intermediate scanning line is combined between each scanning line, but the number is not limited to one, and two or more scanning lines can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of a television image plate making apparatus according to an embodiment of the present invention, FIG. 2 is a storage data pattern diagram of a magnetic disk memory used in the plate making apparatus of FIG. 1, and FIG. FIG. 4 is a diagram showing the scanning lines of a television screen. FIG. 5 is a diagram showing the writing and reading timing of the even field memory and odd field memory used in the plate making apparatus of FIG. 1. FIG. 6 is a perspective view of the cylinder of the scanner. 11... Video tape recorder, 12... Frame number generator, 13... Read frame number indicator, 15... Frame memory, 16...
...Recording/delivery control signal generation circuit, 17...
・Synchronization signal generator, 18... Frequency divider, 19...
...Switch circuit, 22...Switch circuit, 23.
...Logic circuit, 27 ... Control signal generator, 3
0, 32, 33, 36...memory, 31...frequency dividing circuit,
35... Intermediate scanning line generator, 39...
・NTSC decoder, 40... Plate making device. Figure 1 Figure 3 Figure 5 Figure 2 Figure 4 Figure 6

Claims (1)

[Claims] 1. A frame video signal storage device that stores one frame of color television video signal, a memory that stores scanning line signals sequentially read out from the frame video signal storage device, and a memory that stores virtual images between adjacent scanning line signals. an intermediate scanning line signal generating device for synthesizing signals corresponding to the intermediate scanning lines; a means for sequentially sequentially outputting each scanning line signal and the intermediate scanning line signal in synchronization with the scanning speed of the plate making device; a device for converting a signal into an R, G, B signal;
A television image plate-making device comprising a plate-making device such as a scanner that creates Y, M, C, and BK separated plates from G and B signals.