JP3271253B2 - Prompter video signal processor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A prompter of this type 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, and The newscaster 9 arranges an image on the television 6 which is provided in front of the television camera 10.
And a half mirror 8 that reflects the light so that the light can be seen.

[0003]

However, the exchange of originals must be performed by a third party according to the speed at which the newscaster reads the originals, and the timing of exchange is difficult. In addition, as shown in FIG. 5, there is a camera that uses two original cameras and alternates the original cameras to switch the original to be displayed on the television 6. There is a problem that the exchange of the original on the table must be performed by a third party.

On the other hand, as shown in FIG. 6, an original is photographed by an original camera while a long original is wound by a motor, and the original is scrolled up and down or left and right. There is a problem that it takes time and effort to create a manuscript of a length, and it is not possible to switch and display the manuscript 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 apparatus of a prompter that can freely and easily control the feed of a document displayed on the prompter 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 a document based on the video signal, and a television camera. A half mirror that is arranged in front of the television camera and reflects an image displayed on the display means so as to be seen by a newscaster in front of the television camera, a video signal processing device used for a prompter,
An A / D converter for converting a video signal output from the original camera into digital image data; an image memory for storing the image data converted by the A / D converter for a plurality of screens; A D / A converter for converting image data into an analog video signal, an operation unit for instructing 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 control means for controlling writing and reading of data.

[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, reading of image data from the image memory is controlled in accordance with an instruction from the operation unit, and the read image data is D / A converted and output to a prompter, so that originals are read one by one. , And the document can be scrolled up and down or left and right.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the video signal processing apparatus for a prompter according to the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a block diagram showing an embodiment of a video signal processing apparatus 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, and a video signal indicating a document photographed by the document camera is added thereto. The video signal input from the video input terminal 12 is supplied to an A / D converter 14 and a sync separation circuit 16.
Is added to The synchronization separation circuit 16 separates a synchronization signal from an input video signal, and outputs the synchronization signal to the timing generator 18. Timing generator 18
Outputs various timing signals at the time of recording a video signal to each circuit in synchronization with the synchronization signal applied from the synchronization separation circuit 16, and outputs the timing signals to the synchronization signal applied from the central processing unit (CPU) 20 as described later. Various timing signals at the time of reading image data are output to each circuit in synchronization.

An A / D converter 14 converts an input video signal into digital image data, and converts this into digital image data.
Output to 2. The image memory 22 can store, for example, image data of a screen of 46 pages, and writing and reading of the image data are controlled based on signals applied from the timing generator 18 and the address decoder 24. The details of the control of writing and reading of 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 a D / A converter 26, amplified by a video amplifier 28, and output from a video output terminal 29. This video output terminal 29
For example, a document connected to the television 6 shown in FIG. 4 and displayed on the screen of the television 6 is projected forward of the television camera 10 via the half mirror 8.

Next, control of writing and reading 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 contents stored in 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 stored first. The switch 31 is a write switch operated when storing image data of a document in the image memory 22. Each time the write switch 31 is operated, image data for one screen is sequentially stored in the image memory 22.

On the other hand, switches 32A, 32B and 32C are switches for selecting a display method of the original, and switch 32A is selected when the original is scrolled up and down.
The switch 32B is selected when the document is scrolled left and right, and the switch 32C is selected when the document is fed one by one. The switch 32D is connected to the switch 32D.
A switch for instructing movement and switching of the screen in 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
Is an editing switch used to change the order of the originals written in sequence, and if the editing switch 34 is operated, the number of each original (A1, A2,..., D9, D
By operating the switch group 35 corresponding to 10) in a desired order, the order of the originals can be changed.
Note that LEDs (not shown) are provided on the key tops of the respective switches, and the operation of the switches can be confirmed by turning on / off the LEDs.

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

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

Here, when the original is to be scrolled up and down (FIG. 3A), the switch 32A is pressed to select up and down scrolling. When the left side of the switch 32D is depressed, the CPU 20 sequentially changes the address signal via the address decoder 24 and outputs it to the image memory 22 so that the original moves upward, and the CPU 20 designates the original by the address signal. The image data in the storage area is read out and displayed so that the original moves upward. On the other hand, when the right side of the switch 32D is pressed, the original is displayed to move downward, contrary to the above.

Similarly, when the original is scrolled left and right (FIG. 3B), the switch 32B is pressed to select the left and right scroll. Then, when the left side of the switch 32D is pressed, the CPU 20 sequentially changes the address signal via the address decoder 24 and outputs it to the image memory 22 so that the original moves to the left, and the CPU 20 designates the original by the address signal. The read image data in the storage area is read out, and the original 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 rightward, contrary to the above.
The above-described vertical scroll is applied to a horizontally written original, and the horizontal scroll is applied to a vertical written original.

When the originals are to be switched one by one and sent (FIG. 3C), the switch 32C is pressed. Then, when the left side of the switch 32D is pushed once, the CP
U20 changes the address signal via the address decoder 24 and outputs it to the image memory 22 so that the original is switched to the original of the next page. From the image memory 22, the image data in the storage area designated by the address signal is read out. Then, the original of the next page is switched and displayed. On the other hand, when the right side of the switch 32D is pushed once, the original of the previous page is switched and displayed, contrary to the above.

As described above, by using the edit switch 34 and the like to appropriately change the order of the originals,
The display as shown in FIG. Of course, the originals in the exchanged order can be vertically scrolled or horizontally scrolled. Also, the video input terminal 12 and the liquid crystal monitor 36
When the image data of the document is stored in the image memory 22, the document can be checked on the liquid crystal monitor 36. By connecting the video output terminal 29 and the liquid crystal monitor 36, The original to be displayed on the prompter can be checked in advance.

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

[0021]

As described above, according to the video signal processing apparatus for a prompter according to the present invention, the image data of a plurality of originals is temporarily stored in the image memory, and the image data is stored in accordance with the instruction from the operation unit. By controlling the reading of image data from the memory, it is possible to easily control the feeding of the original displayed by the prompter without the help of a third party, and by selecting the reading method from the image memory. There is an advantage that the original can be switched and displayed one by one, the original can be scrolled up and down or left and right, and the degree of freedom of the display method can be increased.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a video signal processing apparatus 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 view showing a display mode of a document displayed by a video signal processing device of a 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 original cameras are used in a conventional prompter.

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

[Explanation of symbols]

 2 Document 4 Document 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 (3)

(57) [Claims] 1. A has a storage capacity of image data of a plurality sheets of such broadcast document, an image memory writing and reading permit the image data, to instruct the writing of image data into the image memory
In both cases, page switching, scrolling up and down, and
Select one of the left and right scroll
Instructing means for instructing reading of image data from the memory; and sequentially operating the image memory based on an operation of the instructing means.
Outputs address signal and writes / reads image data
And control means for controlling the teeth, before specified by the address signal from the control means
The image data read from the storage area of the image memory
And a prompter display means for displaying a document image at a position that can be viewed from the subject side based on the document image. 2. The data written into the image memory is image data obtained by converting a video signal output from a document input device for photographing the broadcast document or the like into digital data by an A / D converter. Prompter video signal processing device. 3. A document input device for photographing a material such as a broadcast manuscript and outputting a video signal, display means for displaying the material based on the video signal, and said display means disposed in front of a television camera. A half mirror for reflecting an image displayed on the television camera so that the image can be seen from the front of the television camera, wherein the video signal output from the document input device is converted into digital image data. A / D converter for converting the image data into an image data, an image memory for storing the image data converted by the A / D converter for a plurality of screens, and a D / A converter for converting the image data read from the image memory into an analog video signal And instructing writing of image data to the image memory
In both cases, page switching, scrolling up and down, and
Before Symbol image menu and select one of the left and right scroll
An operation unit for instructing reading of image data from the memory, and sequentially accessing the image memory based on an operation on the operation unit.
Control means for outputting a dress signal and controlling writing and reading of image data to and from the image memory, a video signal processing device for a prompter.