JPS59174840A - Plate making system for image of captain (character and pattern telephone access information network) system - Google Patents

Abstract

PURPOSE:To prevent the deterioation in picture quality, bleeding, etc., by providing a color shift adjusting circuit, level impedance converting circuit, etc., and performing processing based upon units of video signals R, G, B, and Y. CONSTITUTION:Signals R, G, B, and Y from a CAPTAIN system 3 are made into Rm, Gm, Bm, and Ym by the color shift adjusting circuit 21 of a CAPTAIN connecting device 2, and the level impedance converting circuit 22 synthesizes the signals Rm and Ym, Gm and Ym, and Bm and Ym respectively to perform level conversion, so that signals R', G', and B' are inputted as external RGB signals to a video plate making device. Then, gradation correction part 14 corrects contrast, gradatiols, etc., and the resulting signals are stored in a frame memory 15. Then, the contents of the memory 15 are read out when necessary and color separation plates for a color film and a layout are made on the basis of the result of proper interpolation. Thus, deterioration in picture quality, bleeding, etc., are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cabden distem (+Jaracter
and Pattern Telephone ASs
cess InformationNetwork
The present invention relates to a captain system image plate-making system for easily producing high-quality printing color films or printing separation plates from images of a captain system without using a videotape or the like as a medium.

Conventionally, when obtaining a printed document from an image on the monitor of a captain system, it was common to photograph the image on the monitor with a camera. However, with this method, high-resolution results cannot be obtained, the color temperature of the monitor causes a large difference between the color on the monitor and the color of the finished color film, and the distance between the monitor and camera is short, making it difficult to take close-up shots. Therefore, there is a large aberration between the center and the periphery of the screen, resulting in disadvantages such as distortion of the film image.

Another conventional method is to convert the RGB i of the Captain System image into a standard television signal (NTSC signal in Japan) and record it on a VTR (Video Cheap Recorder). There is a way to obtain.

As shown in Figure 1, the video plate-making device is used for VTR, VDR, etc.
(video disc recorder), telecine equipment, TV receiver, or capture any of the video signals from a TV camera! an input editing section 11 that performs 1iil collection, and an image quality improvement section 1 that corrects the temporal shift between each scanning line of a video signal, suppresses various noises, improves the image quality, and emphasizes the contours of the image.
2, RGB decoders 13 and 19 that convert a video signal into an RGB signal, a gradation correction section 14 that performs contrast correction, parallel movement of seven gradations, adjustment of the gradation of a light part or a shadow part, etc., and RBG correction. a frame memory 15 for storing processed still image information; an interpolation processor 16 for interpolating between scanning lines according to a predetermined calculation formula to obtain high-density RGB image information; a color film production device 17 for producing a color film; a layout system 18 for obtaining color separations, and a monitor 20 for observing image information of each processing step;
It is made up of. In this method, R
The image quality deteriorates because the GB signal is converted to a band-limited standard television signal, and since the RGB signals are once combined, color blurring occurs when the RGB decoder separates the colors again. There are drawbacks such as the fact that each computer uses a different method of converting to a standard television signal.

In light of the above, an object of the present invention is to provide a captain system image plate making system that does not have the above-mentioned drawbacks.

This invention will be explained below.

FIG. 2 is a block diagram briefly showing an embodiment of the present invention, which is composed of a captain system 3 as an image information source, a captain connection device 2, and a video plate making unit 1. The configuration of the video plate making apparatus 1 is shown in FIG. 1 described above.

The captain system 3 outputs R, G, and B as synchronization signals for 5YNC1 character colors, and also outputs a signal Y for background colors.

The captain connection device 2 includes a color shift adjustment circuit 21 and a level/impedice conversion circuit 22. FIG. 4 is a circuit diagram of a portion of the color shift adjustment circuit 21 that converts R2 to Rm. ICI at the input section is an open collector buffer, and a Schmitt trigger circuit IC2 is connected to it.
is connected. Also, R connected to the input stage of IC1
1 is a resistor provided for the final stage open collector buffer of the captain system that outputs the signal R, and
R2 connected to the input stage of 2 is a resistor for circuit protection, R3
is a variable resistor for color shift adjustment. When this resistor R3 is adjusted, the signal Rt immediately before the Schmitt trigger circuit IC2 fluctuates up and down with respect to the threshold value SL of the Schmitt trigger circuit IC2 as shown in FIG. 5, so that its output Rm becomes Rml'.

This results in signals with different widths such as Bm2. The circuit configuration for converting G, B, and Y into Gm, Bm, and Ym, respectively, is also similar. FIG. 6 is a circuit diagram of a portion of the level Φ impedance conversion circuit that converts the signal Rm and the signal Ym into the signal R'', and shows the level conversion transistor TR of the signal Rm.
A transistor TR for level conversion of the signal Ym is provided at the output stage of I.
2 is connected to the output stage of the transistors TRI and TR2, and a transistor T for impedance conversion of the signal R' is connected to the output stage of the transistors TRI and TR2.
R3 is connected. Transistors TRI, TR2,
Resistors R4 and R56, RI3 are connected to the power supply side of TR3, respectively.
．． R9 is connected, a resistor R7 is connected to the output side of the transistors TRI and TR2, a resistor R8 is connected to the input side of TR3, and resistors RIO and R11 are connected to the output side of the transistor TR3. The operation of this circuit is shown in the timing chart of Rm, Ym, and R' in FIG.
' takes three values: A low level, B level indicating the background color, and C level indicating the character color. Furthermore, Gm:
The circuit configuration for converting Ym, Bm and Ym into G' and B', respectively, is also similar.

In the above configuration, the signals R, G, B, and Y from the captain system 3 are respectively connected to the captain connection device 2.
The output width is adjusted by the color shift adjustment circuit 21 of Rm, Gm.
.
) to the analog level (θ-IV), matching the impedance or the input of the video plate making device 1, for example, about 7
5Ω respectively, and the signals R', G', and B'
and is input as an external RGB signal to the video plate making apparatus. Then, the gradation correction unit 14 performs parallel movement of the contrast tone, adjusts the gradation of the light portion or the shadow portion, etc., and stores the results in the frame memory 15. Thereafter, the contents of the frame memory 15 are read out as necessary, and the interpolation processing unit 16 performs appropriate interpolation processing such as the nearest neighbor method, pi-linear method, cubic method, cu-compolation method, etc., and based on the result, , a color film is produced by a color film production device 17, and a color separation plate for layout is produced by a layout system 18, respectively.

Furthermore, the synchronization signal 5YNC from the captain system 3 is input to the video plate making apparatus 1 as it is without being changed by the captain connection device 2, and is used as a synchronization signal.

The present invention has the above-described configuration, and the video signal RGBY
Since it is processed in units and not converted into standard television signals, there are no problems with image deterioration due to band limitations or color blurring due to inaccurate color separation. Furthermore, since the video engraving device 2 is used, there is an advantage that it has functions such as gradation correction and interpolation processing. In addition.

The present invention uses color signals R', G', and B' that are slightly simplified text colors and background colors based on the RGBY signals of the captain system 3.

Although this invention targets the captain system, it is not necessarily limited to this, and includes teletext broadcasting, teletext broadcasting,
Since still image broadcasting uses the same method as the captain system, these systems can also be handled by slightly changing the level/impedice conversion values. The current specifications of the captain system itself are provisional specifications based on experimental stairs.
It is expected that the specifications at the time of commercialization will be slightly different, but this can be addressed by making slight changes.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of the video plate making device;
FIG. 3 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 3 is a block diagram showing the configuration of the captain connection device, FIG. 4 is a partial circuit diagram of the color shift adjustment circuit, and FIG. 5 is a block diagram showing the configuration of the captain connection device. FIG. 6 is a diagram showing a part of the circuit diagram of the level-impedance conversion circuit, and FIG. 7 is a diagram explaining the operation. 1... Video plate making device, ] 1... Input editing section, 12
...Image quality improvement section, 13.18...ROB decoder,
14... Gradation correction unit, 15... Frame memory, 1
8... Interpolation processing unit, 17... Color film creation device, 18... Layout system, 20... Monitor, 2... Captain connection device, 21... Color shift adjustment circuit, 22...・Level-impedance conversion circuit, 3
...Captain system. \. Applicant's agent Yuzo Yasugata 43 Figure 4 Speed diagram 7i Figure 7

Claims (1)

[Claims] a) A color shift adjustment circuit that adjusts the color shift of the RGBY signals from the captain system, and a level controller that synthesizes the RGBY signals and converts the output level and output impedance.
a) a captain connection device consisting of an impedance conversion circuit; b) a gradation correction unit that corrects the color gradation; a frame memory that stores the corrected image information; and an interpolation unit that performs interpolation processing between image scanning lines. Captain System image plate making, characterized in that it comprises: a video plate making device consisting of processing and a color film making device for making a color film for printing from the results of interpolation processing or a layout system for making color separation plates for printing; system.