JPS60103883A - Printing system of still picture - Google Patents

Abstract

PURPOSE:To allow usage of a small-capacity memory suitable for writing picture signals for one horizontal scanning period as a memory by storing regenerating picture signals for one horizontal scanning period by field or frame and reading them at a reading speed in accordance with a copying speed of a printer to supply them. CONSTITUTION:R (red) signals from an input terminal 1 are supplied to an analogue/digital convertor 2, converted into digital signals by a clock pulse from a writing clock pulse generator 6 and supplied to an IC memory 3. Digital R signals (c) for one hour period from the nth horizontal synchronizing signals to the (n+1) said signals are written in the IC memory 3. Then the IC memory 3 starts a reading action due to a fall of a reading pulse (g), a reading clock pulse (b) is supplied from a printer 5, and written digital R signal (c) is read out. The readout digital R signal (c) is supplied to the printer 5 through a buffer circuit 4 which allows matching between the IC memory 3 and the printer 5, and printing is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a still image printing system suitable for copying a reproduced image based on a reproduced video signal l of a video tape recorder.

[Background of the invention]

Conventional techniques for printing images of television broadcast programs 9
Aj is known. (KakaZ) technology is that while watching the reproduced Lthi image projected on the television receiver, when Nogata Nozomu's picture mound is projected, one frame or one frame is displayed depending on the required Hosaku se line γ. The image key signal is stored in the memory ζ0, and it is roughly retrieved and supplied to the printer.

On the other hand, video tape recorders have become extremely popular in recent years, and it has become possible to record a desired television set or to record a desired scene by connecting it to a television camera. J) Recording by video tape recorder8
Images that have been printed can be copied in a similar manner using conventional printing systems.

However, in conventional printing systems, as mentioned above, a video signal of one frame or one field is stored once and then read out and supplied to the printer, so a memory capacity of about 1 Mbit is required. . Even if such a memory is used as an IC memory, since the memory MM is extremely large, it is very expensive as a memory. Moreover, in recent years, printers with multiple gradations have become available.
In general, since it is possible to make a color copy by 7, you will need 1 memo link with a capacity of 1,000 Jl,)
, it is necessary to convert it into a B signal and supply it to the printer.
A memory is required for each signal, which increases the size of the printing system, and also has the disadvantage that it is very expensive.

[Purpose of the invention]

The purpose of this invention is to eliminate the drawbacks of the above-mentioned prior art, make the memory 8n'E-small, and make it small and inexpensive.
The purpose of the present invention is to provide a stationary '-I printing system.

[Summary of the invention]

In order to achieve this object, the present invention makes use of the still image playback function of a video tape recorder to obtain one of the reproduced video signals.
A pinched image signal is stored for one horizontal scanning period for each field or frame, and this is applied to the copy speed of the printer.
The feature is that it is possible to use a small-capacity memory that can read out the image signal at the same output speed and supply it to the printer as a memory. be.

[Implementation sequence of the invention]

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a still image printing system according to the present invention, in which 1 is an input terminal, 2 is an analog-to-digital converter, 3 is an IC memory, 4 is a recess; Printer, 6 is a write clock pulse generator, 7 is a counter, 8 is an input terminal, 9 is a counter, 10
．． 11 is an input terminal.

2, 3IA and 4 are timing charts showing the operation of FIG. 1.

In Fig. 41: At j5, enter 1Arf1. io, 11
is the input terminal of the primary color signal, the R (亦) signal is sent from the input terminal l, the (ma G (y) 1i-edge) is sent from the input terminal 10, and the B (H) 1i signal is sent from the input terminal 11. A composite synchronizing signal a is supplied from the input terminal 8.The R, G, and B signals are not output by a conventional video tape recorder, but these R, G, and B signals are output from the reproduced color video signal. , it is easy to output the B signal.Furthermore, the processing method used to send the 0.B9 signal supplied from the input signal 1011 to the printer 5 is completely C for these primary color signals. Since they are the same, only the processing for the It partner number will be explained below.

The signal R(fi) from the input terminal 1 is supplied to the analog-to-digital converter 2, and converted into a digital signal by the clock pulse from the input terminal 6.
The C memory 3 supplied to the U memory 3 has a capacity to record 1L of 1L for 1 time period, and is constantly supplied with clock pulses from the write clock pulse generator 6. Now, I'll explain how to write R15 into the IC memory 3 using Figures 2 and 3.

When the printer 5 is put into operation by operating the operation section (not shown), the video tape recorder 7J (shown in the figure) enters the still image playback mode, a color still image signal is played back, and its R signal is supplied to the input terminal 1. .

Also, the read clock pulse b from the printer 5 is output from the IC.
The signal is supplied to the memory 3 and the counter 9. At this time, I.C.
The memory 3 is in an inactive state, and the digitized signal (hereinafter referred to as digital R signal) C is not transferred to the IC memory 3. On the other hand, the counter 9 counts the number of read clock pulses bB1 field period (hereinafter, this number f Np
) When counting, pulse d6 is generated and this pulse d
is supplied to the IC memory 3 and the counter 7 as a write command pulse.

As shown in FIG. 2, after receiving this 1° step command pulse dB, the counter 7 detects the first vertical synchronizing signal of the composite synchronizing signal a supplied from the input terminal 8, and receives this vertical direction signal. count horizontal synchronization signals from When the counter 7 counts the number, for example (n-1), a homokomi section designation pulse e is generated, and this sokomi section 1u is generated.
The J designation pulse e is supplied to the IC memory 3.

The IC memory 3 is supplied with a composite synchronization signal a' from an input terminal 8. FIG. 3 is an enlarged view of the period T including the n-th horizontal synchronizing signal and the (n+1)-th horizontal synchronizing signal in FIG.
When the memory 3 is supplied, the IC memory 3 receives the digital signal C from the analog-to-digital converter 2 at the falling edge of the horizontal synchronization signal immediately after the write interval pulse e, that is, the nth horizontal synchronization signal. Start writing. Then, this writing ends at the rising edge of the next (n+1)th horizontal synchronizing signal.

In the end, the IC memory 3 stores information starting from the nth horizontal synchronization signal (
IH at the n+1)th horizontal synchronization signal talk (however, H is l
A digital signal C for the period (horizontal scanning period) is written.

In this write, the write clock pulse f is
This is done by supplying the data to the memory 3.

This (n+1)th horizontal inter-horizontal M signal is the write end pulse g, but is also the bladder ejecting start pulse. FIG. 4 is a timing chart showing the bladder ejecting operation of the IC memory 3 from this bladder ejecting start pulse g.

Therefore, if the read operation of the IC memory 3 is performed as follows:
The IC memory 3 starts a read operation at the fall of the read start pulse g, and the digital R signal C written in response to the bladder evacuation clock pulse b being supplied from the printer 5 is read out. The digital signal C output from the bladder 6 is sent to the IC memory 3
and the printer 5.
The image is supplied to the printer 5 via the printer 5 and printed.

At the same time, the counter 9 is supplied with the read clock pulse b and starts counting. When the count value becomes NF and the count for one frame period is completed, the read end pulse di
Occur. This =a output end pulse d is supplied to the IC memory 3 and the counter 7, and these are the read end pulse d.
It is reset at the rising edge of , and reading ends. At the same time, the counter 9 is also reset.

(Note) I interpreted the present invention as printing by sequentially shifting L to H every frame (or one field) and printing with the reproduced signal of the IH period. The convolution operation following IC memory reading is described and discussed in this way.The read end pulse d in Fig. 4 is also the write command pulse d, and this write command The IC memory 3 is set to the write mode at the falling edge of the response d, and the write clock pulse f is supplied from the falling force 1 of the horizontal synchronizing signal immediately after that, and the IC memory 3 is set to the digital IL (i. This horizontal synchronization signal is the (n+1)th horizontal synchronization signal after the vertical synchronization signal at the start of the next frame following the previous write frame, and the IC' memory 3 stores this (n+1) )-th horizontal synchronization (IH from the falling edge of No. 1 to the rising edge of the next (n + z)-th horizontal sync signal)
Write the digital R signal C for the period. Therefore, the grading period of this frame is shifted by IH from the grading period of the previous frame.

Thereafter, in the same way, IHM is shifted by IH for each frame.
The insertion and reading of the digital R Tsukugo in between is repeated,
The printer 5 prints the R signal for each IH period for each frame.

In this embodiment, Gt is used for printing with a reproduction signal of each IH period for each frame, but it is also possible to print with a reproduction signal of IH period for each field, and the same effect can be obtained. Effects can be obtained. Also,
The G signal and B signal are also processed in the same way as the R signal and sent to the printer 5.
supplied to In this case, the write clock pulse generator 6 and the counter 7.9 can also be used as a processing circuit for the G, B signals.

〔Effect of the invention〕

As explained above, the present invention utilizes the fact that frames or fields with the same information content are repeatedly played back in the still image playback mode of a video tape recorder, and allows the IH period to be re-maintained for each frame or field. a+i' is stored and read out and printed according to the printing speed of the printer, so a cheap memory can be used as the memory for storing such reproduction signals. Small size (allows for
The object of the present invention is to provide a still image printing system with excellent functions at a low cost, except for the drawbacks of the prior art.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the still image printing system according to the present invention, FIG. 2 is a timing chart showing the write operation of the IC memory of FIG. 1, and FIG. 3 is a 2"l,
8144 is an enlarged timing chart showing the write operation in FIG. 1 during period 11 in FIG. 2, and FIG. 1...R signal input terminal. 2... Analog digital converter. 3...IC memory, 4...buffer circuit. 5...Printer. 6...Write clock pulse generator. 7...Counter. 8...Composite synchronization signal input terminal. 9...Counter. Representative Patent Attorney Akio Takahashi No. 1 Figure 2 (- No. 3 No. 2)
4 Figure 9g 2, b-m-----1----------- Master 1-6()C

Claims (1)

[Claims] In a still image printing system in which a reproduced video signal from a video tape recorder is supplied to a printer and the reproduced image is copied, the video tape recorder is placed in a still image reproduction mode, the still image signal is reproduced, and the still image signal is reproduced.
(ii) A video signal is extracted for one horizontal scanning period for each field or frame of the signal and written into the memory, and the video signal stored in the memory is read out at a speed corresponding to the print speed of the printer. A still image printing system characterized in that the still image is read out and supplied to the printer.