JPH0686105A - Video signal processing unit for prompter - Google Patents

Abstract

PURPOSE:To simply control the feeding of an original displayed on a prompter without aid of a 3rd party and to enhance the degree of freedom of the display method by storing picture data of plural originals to a picture memory and controlling the read of the picture data from the picture memory. CONSTITUTION:A video signal obtained by picking up an object by an original camera is A/D-converted by an A/D converter 14 and the picture data of the plural originals are stored in a picture memory 22 capable of storing them at once. Then a CPU 20 controls reading of picture data from the picture memory 22 according to an instruction in an operation section 30 and the read picture data are D/A-converted by a D/A converter 26 and the result is outputted to a prompter, then a newscaster selects originals one by one simple for display without aid of a 3rd party or the original is displayed with scrolling vertically or horizontally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prompter for displaying a manuscript to be read by a newscaster with a manuscript camera and projecting and displaying the manuscript in front of a television camera. The present invention relates to a video signal processing device for a prompter.

[0002]

2. Description of the Related Art This type of prompter includes a document camera 4 for photographing a document 2 as shown in FIG. 4, a CRT television 6 for displaying a document based on a video signal from the document camera 4, The image on the television 6 arranged in front of the television camera 10 is displayed on the newscaster 9
And a half mirror 8 which reflects the light so that the light can be seen.

[0003]

However, the original must be replaced by a third party according to the speed at which the newscaster reads the original, and the replacement timing is difficult. As shown in FIG. 5, two original cameras are used, and the originals displayed on the television 6 are switched by alternately switching these original cameras. There is a problem that a third party must replace the original document on the table.

On the other hand, as shown in FIG. 6, there is a document in which a document is photographed by a document camera while winding a long document by a motor and the document is scrolled up and down or left and right. There is a problem in that it takes time and effort to create a full-sized original, and the originals cannot be switched and displayed one by one. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a video signal processing device for a prompter in which the feeding control of a document displayed by the prompter can be performed freely and easily without the help of a third party. And

[0005]

In order to achieve the above object, the present invention provides a document camera for photographing a document and outputting a video signal, display means for displaying the document based on the video signal, and a television camera. A video signal processing device used in a prompter, which comprises a half mirror arranged in front of the display means for reflecting an image displayed on the display means so as to be viewed by a newscaster in front of the television camera,
An A / D converter that converts a video signal output from the document camera into digital image data, an image memory that stores the image data converted by the A / D converter for a plurality of screens, and read from the image memory A D / A converter that converts image data into an analog video signal, an operation unit that instructs writing and reading of image data to and from the image memory, and image data to the image memory based on an operation on the operation unit And a control means for controlling writing and reading.

[0006]

According to the present invention, a video signal obtained by photographing with a document camera is A / D converted and temporarily stored in an image memory capable of storing image data of a plurality of documents.
Then, the reading of the image data from the image memory is controlled according to the instruction from the operation unit, the read image data is D / A converted, and the converted image data is output to the prompter. Can be switched and displayed, or the document can be scrolled vertically or horizontally.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a video signal processing device for a prompter according to the present invention will be described in detail below with reference to the accompanying drawings.
1 is a block diagram showing an embodiment of a video signal processing device for a prompter according to the present invention, and FIG. 2 is an external view thereof.

In FIG. 1, a video input terminal 12 is connected to a video output terminal (not shown) of a document camera so that a video signal representing a document imaged by the document camera can be added. The video signal input from the video input terminal 12 is an A / D converter 14 and a sync separation circuit 16
Added to. The sync separation circuit 16 separates the sync signal from the input video signal and outputs the sync signal to the timing generator 18. Timing generator 18
Outputs various timing signals at the time of recording the video signal to each circuit in synchronization with the synchronization signal added from the sync separation circuit 16 and also to the synchronization signal added from the central processing unit (CPU) 20 as described later. Synchronously, various timing signals at the time of reading image data are output to each circuit.

The A / D converter 14 converts the input video signal into digital image data, and converts this into image memory 2.
Output to 2. The image memory 22 can store, for example, image data of a screen for 46 pages, and writing and reading of the image data are controlled based on signals supplied from the timing generator 18 and the address decoder 24. The details of the writing and reading control of the image data in the image memory 22 will be described later.

The image data read from the image memory 22 is converted into an analog video signal by the D / A converter 26, amplified by the video amplifier 28, and then output from the video output terminal 29. This video output terminal 29 is
For example, a document connected to the television 6 shown in FIG. 4 and displayed on the screen of the television 6 is projected in front of the television camera 10 via the half mirror 8.

Next, writing and reading control of image data in the image memory 22 will be described. First, various switches in the operation unit 30 will be described with reference to FIG. In the figure, a switch 30A is a clear switch for erasing the stored contents of the image memory 22, and a switch 30B is a start switch for returning the read image data to the image data of the original document initially stored. The switch 31 is a writing switch that is operated when the image data of the original is stored in the image memory 22, and each time the writing switch 31 is operated, one screen of image data is sequentially stored in the image memory 22.

On the other hand, the switches 32A, 32B and 32C are switches for selecting the display method of the original, and the switch 32A is selected when the original is scrolled up and down.
The switch 32B is selected when scrolling the document left and right, and the switch 32C is selected when feeding the document one by one. Further, the switch 32D is the switch 32 described above.
A switch for instructing movement and switching of the screen by the display method selected by any one of A, 32B, and 32C. The switch 33 is a dial switch for setting the moving speed of the document when the document is scrolled vertically or horizontally.

The switch 34 is a write switch 31.
This is an edit switch used when changing the order of the manuscripts sequentially written by, and the number of each manuscript (A1, A2, ..., D9, D can be changed by operating this edit switch 34).
By manipulating the switch group 35 corresponding to 10) in a desired order, the order of the originals can be changed.
In addition, LEDs (not shown) are provided on the key tops of the switches, and the switch operation can be confirmed by turning on / off these LEDs.

Next, a case where image data of a plurality of originals (a plurality of frames) is stored in the image memory 22 will be described. In this case, when the write switch 30A is pressed, one frame of image data showing the document being photographed by the document camera is stored in the image memory 22. In this way, image data for a plurality of frames showing all originals to be displayed by the prompter is stored in the image memory 22 in advance.

Next, the reading control of the image data for a plurality of frames stored in the image memory 22 will be described. First, the start switch 30B is pushed down, and the image memory 22
The address for reading the image data is returned to the address of the storage unit in which the image data of the original document stored first is stored, and the display method of the original document is selected by the switches 32A, 32B and 32C.

Here, when the document is scrolled up and down (FIG. 3A), the switch 32A is pressed to select the up and down scroll. Then, when the left side of the switch 32D is pressed, the CPU 20 sequentially changes the address signal through the address decoder 24 so that the document moves upward, and outputs it to the image memory 22. From the image memory 22, the address signal is designated. The image data in the storage area is read and the original is displayed so as to move upward. On the other hand, when the right side of the switch 32D is pressed, the document is displayed so as to move downward, contrary to the above.

Similarly, when the document is scrolled left and right (FIG. 3B), the switch 32B is pressed to select left and right scrolling. When the left side of the switch 32D is pressed, the CPU 20 sequentially changes the address signal through the address decoder 24 so that the document moves to the left and outputs the image signal to the image memory 22, and the image memory 22 designates the address signal. The image data in the stored storage area is read and the document is displayed so as to move to the left. On the other hand, when the right side of the switch 32D is pressed, the document is displayed so as to move to the right, contrary to the above.
The vertical scroll is applied to a horizontally written document, and the left and right scroll is applied to a vertically written document.

When the originals are switched and fed one by one (FIG. 3C), the switch 32C is depressed. Then, if you push the left side of the switch 32D by one push, CP
The U20 changes the address signal via the address decoder 24 so that the original is switched to the original of the next page and outputs it to the image memory 22, and the image data in the storage area designated by the address signal is read from the image memory 22. Then, the original on the next page is switched and displayed. On the other hand, when the right side of the switch 32D is pushed by one push, the document of the previous page is switched and displayed contrary to the above.

It should be noted that, as described above, the order of the originals is appropriately changed by using the edit switch 34 or the like, as shown in FIG.
A display like (D) can be made. Of course, it is also possible to scroll the originals in this exchanged order up and down or left and right. In addition, the video input terminal 12 and the LCD monitor 36
When the image data of the original is stored in the image memory 22 by connecting with, the original can be confirmed on the liquid crystal monitor 36, and by connecting the video output terminal 29 and the liquid crystal monitor 36, You can check the originals to be displayed on the prompter in advance.

Further, by providing a remote controller transmitter / receiver corresponding to the switch 32D, the newscaster can easily control the feeding of the document while reading the document.

[0021]

As described above, according to the video signal processing device of the prompter according to the present invention, the image data of a plurality of originals are temporarily stored in the image memory, and the image is displayed according to the instruction from the operation unit. By controlling the reading of the image data from the memory, it is possible to easily control the feeding of the document displayed by the prompter without the help of a third party, and by selecting the reading method from the image memory. There are advantages that the originals can be switched and displayed one by one, the originals can be scrolled vertically or horizontally, and the degree of freedom of the display method can be increased.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a video signal processing device for a prompter according to the present invention.

FIG. 2 is an external view of the video signal processing device shown in FIG.

FIG. 3 is a diagram showing a display mode of a document displayed by the video signal processing device of the prompter according to the present invention.

FIG. 4 is a configuration diagram showing an overall configuration of a conventional prompter.

FIG. 5 is a diagram showing a case where two document cameras are used in a conventional prompter.

FIG. 6 is a diagram showing a case where a document is scrolled in a conventional prompter.

[Explanation of symbols]

 2 ... manuscript 4 ... manuscript camera 6 ... television 8 ... half mirror 10 ... TV camera 14 ... A / D converter 18 ... timing generator 20 ... CPU 22 ... image memory 24 ... address decoder 26 ... D / A converter 30 ... operation unit

Claims (1)

[Claims] 1. A document camera for photographing a document and outputting a video signal, display means for displaying the document based on the video signal, and an image arranged on the front of the television camera and displayed on the display means. A video signal processing device used in a prompter comprising a half mirror for reflecting a newscaster in front of a television camera, wherein the video signal output from the document camera is converted into digital image data. A D converter, an image memory that stores the image data converted by the A / D converter for a plurality of screens, a D / A converter that converts the image data read from the image memory into an analog video signal, and the image memory An operation unit for instructing writing and reading of image data to and from the image memory based on an operation on the operation unit Video signal processing apparatus prompter, characterized in that it comprises control means for controlling writing and reading of image data, the.