JPH0287191A - Apparatus for inputting video signal - Google Patents

Abstract

PURPOSE:To easily confirm contents and to prevent a wrong video signal from being inputted by providing a means which still images of a video signal intermittently while the video signal to be displayed on a document editing device display part is thinned out for a certain time. CONSTITUTION:The video signal which is outputted from the video signal output terminal of a television set 2 is inputted to a video signal input device 1 though an input cable 4. The video signal is converted in the video signal input device 1 into a signal to be displayed and stored on a document editing device 3 such as a personal computer and a word processor, so that the video signal from the television set 2 is displayed intermittently on the display part of this device 3 while thinned out for the certain time. Consequently, the contents can easily be confirmed and a wrong signal is prevented from being inputted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a video signal input device, and particularly to a video signal input device for inputting video signals from a television, video camera, etc. to a document editing device such as a personal computer or word processor. Regarding equipment.

[Conventional technology]

Image scanners have conventionally been used as devices for inputting image information into document editing devices such as personal computers and word processors, and an image information input device described in Japanese Patent Application Laid-Open No. 63-33057 is known as a handy type. ing. This image information input device performs photoelectric conversion using an image sensor to generate an image data signal. Similarly, video signals from televisions and video cameras are also generated by photoelectric conversion using an image sensor, and are sequentially processed in a predetermined order. is being sent to. Therefore, it is easy to input the photoelectrically converted video signal into a document editing device such as a personal computer or word processor in the same way as an image input device, and it is already commercially available as a video signal input device for televisions, video cameras, etc. has been done.

[Problem to be solved by the invention]

However, in the above-mentioned video signal input device, when importing a video signal into a document editing device such as a personal computer or a word processor, the operator operates a switch while watching the television screen and when the screen to be imported is displayed. It captures the video signal of that screen.

This method is difficult because the television screen changes as it scans.
There is a problem in use in that when an attempt is made to capture the next screen, the next screen is displayed, and it is easy to accidentally capture the next screen and capture the video signal of the desired screen into the document editing device.

SUMMARY OF THE INVENTION An object of the present invention is to provide a video signal input device that solves the above problems by displaying a video signal on a display section of a document editing device so that the video signal to be captured can be easily confirmed.

[Means to solve the problem]

In order to solve the above-mentioned problems, the video signal input device of the present invention displays the video signal of a television or the like in a partially thinned out screen.

[Effect]

In the present invention, the video signal from a television or the like is continuously displayed on the display unit of the document editing device in a state where the video signal is thinned out by a certain amount of time, so that the contents can be easily checked.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3 (1) and (2).

FIG. 1 is for explaining the usage state of the video signal input device according to the present invention. The signal is input to the signal input device 1. The video signal is converted inside the video signal input device 1 into a signal for displaying and storing in a document editing device 3 such as a personal computer or a word processor, and then inputted to the document editing device 3 via an output cable 5 and displayed. The data to be stored is stored in a storage unit such as a floppy disk provided in the document editing device 3 by performing a predetermined operation.

FIG. 2 is a circuit block diagram of the video signal human power device 1,
As described above, the video signal 6 inputted from the input terminal 8 of the video signal input device 10 from the television 2 via the input cable 4 is inputted to the video signal amplification circuit 9. The video signal 6 input to the video signal amplification circuit 9 also contains signal components unnecessary for the video signal input device 1 of the present invention, and the video signal amplification circuit 9 converts the luminance signal 12 . The synchronizing signal 14 is taken out, amplified, and then input to the video data creation circuit 10 and the control section 17, respectively. Signals are input to the video signal amplification circuit 9 from a brightness adjustment volume 21 and a contrast adjustment volume 22 for changing the brightness and contrast of the video signal output from the video signal input device 1. The luminance signal 12 is input to the video data creation circuit 10 along with the dither data signal 13 created by the dither data creation circuit 11 in response to a signal from the control section 17, and is binarized and input to the control section 17 as the video data signal 7. Ru. The dither data signal 13 created by the dither data creation circuit 11 is a switching signal from the gradation changeover switch 16 inputted to the control unit 17. Binary images such as texts are converted into black and white binary images, and normal images (landscapes, people, etc.) are converted into binary images. Bayer method, which is a pseudo-halftone.

By selecting one of the halftone method and the spiral method.

It is created by switching the binarization threshold for each dot. The synchronization signal 14 input to the control unit 17 acts as a signal indicating the beginning of the horizontal scanning synchronization signal from the video signal 6, and this signal is controlled by the control unit 17 and output from the I/F signal generation circuit 18 for document editing. It acts as one of the interface signals with the device 3. When the video capture switch 23 is turned on, the output of this signal is stopped by the intermittent sub-scanning synchronizing signal generating circuit 15 for a certain period of time as shown in a timing chart shown in FIG. 3, which will be described later, and this process is repeated. The video data signal 7 input to the control unit 17 is one screen worth of video from the television 2 converted into serial/parallel data by the R/W circuit 19 and sent to the memory unit 2 along with memory control and address signals from the control unit 17.
0 and written as data. After this, I
R/W circuit 1 in accordance with the timing of the interface signal between the /F signal generation circuit 18 and the document editing device 1.
The data is read from the memory section 20 while being parallel-to-serial converted in step 9, and is outputted as data for one screen to the document editing device 1 from the output terminal 25 together with the interface signal from the I/F signal generation circuit 18. The output terminal 25 also includes a current input terminal of the video signal input device 1 supplied from the document editing device 1, and is input to the power supply circuit 24 to supply the 'editorial'.

FIG. 3 is a timing chart for explaining the operation of the sub-scanning synchronization signal generation circuit 15 described above, and in the figure (A)
The timing chart shown in (1) is a signal for synchronizing the beginning of horizontal scanning when data read out from the memory section 20 is outputted from the /F signal generating circuit 18 to the document editing device 1 and displayed on the display section. , and the timing chart shown in (B) in the figure is a signal from the video capture switch 23. As shown in (1) in Figure 3, as the (B) signal changes from high level to low level, the (A) signal becomes a predetermined number of pulse signals (the same number as the vertical resolution for display). The pulse signal is continuously generated for a time T1, and then a pulse signal is generated again after the low level time T2 has elapsed. This operation is performed continuously while the signal (B) is at a low level. Here, the time Ti is the time for displaying the data read from the memory unit 20 on one screen on the document editing device 1, and the time T2 is the time for displaying the data read from the memory unit 20 on one screen, and the time T2 is the time for displaying the data read from the memory unit 20 on one screen, and the time T2 is the time for displaying the data read from the memory unit 20 on one screen
The time period during which the screen displayed on the document editing device 1 remains still and continues to be displayed (the image on the television 2 during this period is thinned out and is not displayed). The time T2 is selected between 0.5 and 1.0 seconds in consideration of the number of television screens to be thinned out and the time required to determine whether to store the data. is valid.

(A) When the signal is at low level (time 'r2), Figure 3 (
As shown in 2), when the (B) signal changes to high level (the operator decides to store the data displayed on the document editing device 1 in the storage device and operates the video capture switch 23), the (A) The signal becomes low level, and output of new video data to the document editing device 1 is stopped.

According to this embodiment, the video signal is imported while looking at a screen that is displayed intermittently while taking into consideration the appropriate time for the operation (including judgment) to import the video signal into the document editing device. This has the advantage of improving operability by completely preventing the capture of erroneous video signals.

〔Effect of the invention〕

According to the present invention, when a video signal from a television or the like is input into a video signal input device into a document editing device such as a personal computer or a word processor, the video signal from the television or the like is output for one screen and then for a certain period of time. A sub-scanning synchronization signal intermittent generation circuit is provided to stop the output and repeat this intermittently. As a result, a video signal from a television or the like is intermittently displayed on the display unit of the document editing device in a state where the video signal is thinned out by a certain amount of time.

Video signals from televisions, etc. are continuous and change instantaneously, so if you try to import the necessary video signal into your document editing device while looking at this display, you may accidentally import the video signal from the next screen. However, by considering the appropriate amount of time for the operation to import the video signal into the document editing device, it is possible to import the video signal while the screen is displayed intermittently and still. This has the excellent effect of improving operability, as it allows you to easily check the data and completely prevents the capture of erroneous video signals.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining the usage state of the video information input device of the present invention, FIG. 2 is a circuit block diagram showing one embodiment of the circuit of the device of the present invention, and (1) and (1) in FIG. 2) is a time chart diagram for explaining video data input processing of the apparatus of the present invention. 1... Video signal input device, 2... Television, 3
. . . Document editing device, 15 . . . Sub-scanning synchronization signal intermittent generation circuit, 17 . . . Control unit, 23 .

Claims (1)

[Claims] 1. In a video signal input device that inputs a video signal output from a television or the like to a document editing device equipped with a display unit such as a personal computer or a word processor, the video signal is displayed on the display unit of the document editing device. A video signal input device characterized by comprising means for displaying a video signal intermittently and still while thinning the video signal for a certain period of time. 2. The video signal input device according to claim 1, wherein the means for statically displaying a static display on the display section of the document editing device samples the video signal at regular intervals. 3. The video signal input according to claim 1, wherein the means for statically displaying on the display section of the document editing device sends the sampled video signal to the display section at regular intervals. Device. 4. The video signal input device according to claim 1, characterized in that the thinning time of the video signal statically displayed on the display section of the document editing device can be changed.