JPH07283972A - Prompter device - Google Patents

Abstract

(57) [Abstract] [Purpose] The image signal of the original image capturing camera is horizontally inverted and displayed on a flat display such as a PDP or LCD.
A half mirror reflects it toward the speaker. [Structure] The camera 1 images a speaker 2 with light transmitted through a half mirror 8. The document 3 placed in front of the speaker 2 is imaged by the document imaging camera 4, the required signal processing and digital conversion are performed by the signal processing unit 5, and the result is input to the left-right inverting unit 6. In the left-right inverting section, the input signal is written in the scanning order for each horizontal scanning by the up-count signal of the up-down counter, and this data is read by the down-count signal of the up-down counter in the reverse order of the writing. This writing / reading is alternately performed in the two field memories by the latch circuit, and the read signal is converted into analog. The signal from the left-right reversal section is applied to the display section 7,
The image is displayed on a PDP or LCD, and this image light is reflected by the half mirror 8 toward the speaker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prompter device,
Television camera for capturing originals (hereinafter abbreviated as camera)
The present invention relates to an image displayed in front of a speaker (announcer, etc.) imaging camera.

[0002]

2. Description of the Related Art A prompter device is used so that a speaker reading a manuscript can read a manuscript placed at his or her hand with his or her line of sight facing a camera for picking up an image of the speaker. In the prompter device, a document placed in front of the speaker is imaged by a document imaging camera placed above the speaker, this image is displayed on a monitor screen in front of the speaker imaging camera, and this image is displayed. A half mirror arranged in front of the camera reflects the light toward the speaker so that the speaker can read the manuscript with his or her line of sight facing the camera. However, when the image from the document imaging camera is displayed on the monitor and reflected by the half mirror, the speaker sees the image of the document as left-right inverted regardless of the orientation of the monitor screen. When using a cathode ray tube (CRT) for the monitor,
This problem can be solved by setting the horizontal scanning direction of the electron beam of the CRT to the opposite direction to the normal direction, but since the prompter device using the CRT is heavy, it must be firmly fixed, and the device must be moved. It was unsuitable for applications that may be used.

[0003]

If a flat type display such as a plasma display panel (PDP) or a liquid crystal display panel (LCD) is used for the display unit, the weight of the device can be reduced, so that the device can be moved. It is suitable for applications such as use. However, in these flat-panel displays, the image is not displayed by scanning the electron beam, and therefore, the left and right of the image cannot be reversed by a method compatible with the CRT. For example, the document capturing camera may be a camera that outputs a video signal in which the left and right of the image are reversed, but such a camera is a special one. It is an object of the present invention to provide an image displayed on the screen of a display unit with left and right reversed while using a normal camera.

[0004]

In order to solve the above-described problems, the present invention solves the above-mentioned problems by displaying a camera based on a video signal from a camera for picking up an image of a speaker, a document image pickup camera for picking up an image of a document, and a document image pickup camera. A display unit to be displayed on, a half mirror which is placed in front of the camera, transmits light from a speaker and reflects image light from the display unit in the direction of the speaker,
An A / D conversion unit provided between the document imaging camera and the display unit for converting a video signal from the document imaging camera into a digital signal, and a signal from the A / D conversion unit are alternated for each horizontal scanning. At least a pair of memories for recording one frame, an up-down counter for writing the signals of the respective horizontal scans to the memories in a scanning order, and a reading in the reverse order of the writing, and a read-out counter from the memories. And a memory controller for controlling the pair of memories, an up / down counter, and a selector based on a synchronization signal separated from the video signal as a reference. The present invention provides a prompter device.

[0005]

With the above construction, in the prompter device according to the present invention, the document placed in front of the speaker is imaged by the document imaging camera, and the video signal from the document imaging camera is converted into a digital signal. , 1 frame is alternately recorded in the pair of memories by up-counting by the up-down counter, and then this data is read by the down-counting by the up-down counter in the order opposite to the writing order and then by the selector. Alternately switched in the scanning line order, converted into an analog signal, input to the display unit and displayed on the screen. The light of this image is reflected toward the speaker by a half mirror placed in front of the speaker imaging camera. Light from the speaker passes through the half mirror and enters the speaker imaging camera behind the half mirror.

[0006]

Embodiments of the prompter device according to the present invention will be described in detail below. FIG. 1 is a block diagram of the essential parts of an embodiment of the prompter device according to the present invention, FIG. 2 is a schematic diagram of the essential parts of another embodiment of the prompter device according to the present invention, and FIG. FIG. 4 is a block diagram of a main part of an embodiment of the inverting unit, and FIG. 4 is a block diagram of a main part of another embodiment of the signal processing and the left / right inverting unit of the prompter device according to the present invention.

In FIG. 1, 1 is a speaker imaging camera, and 2 is a speaker imaging camera.
Is a speaker, 3 is a manuscript, and the camera 1 images the speaker 2 by the transmitted light of the half mirror 8. 4 is a document imaging camera,
The original 3 is imaged. A signal processing unit 5 processes the video signal from the camera 4. Reference numeral 6 is a left-right reversing unit, which is a signal processing unit 5.
Image signals are converted in the reverse order of the horizontal scanning of the camera 4. 7 is a display unit, which is a plasma display panel (P
DP) or a liquid crystal display panel (LCD), etc., and displays the image of the original 3 by reversing the image of the document 3 in response to a signal from the left / right reversing unit 6. The half mirror 9 is arranged diagonally downward in front of the camera 1, reflects the image light from the display unit 7 toward the speaker 2, and transmits the light from the speaker 2.

In FIG. 2, the display unit 11 is composed of a PDP, an LCD or the like, and the left / right reversing unit 6 is formed integrally with the display unit 11.

Next, the operation of the prompter device according to the present invention will be described. The document 3 placed in front of the speaker 2 is imaged by the document imaging camera 4, and the video signal output from the camera 4 is input to the signal processing unit 5, for example, R (red), G
Separated into three color signals of (green) and B (blue), as shown in FIG. 3, the brightness / contrast adjusting unit 21 adjusts the brightness and the contrast, and the LPF (low-pass filter) 22 respectively.
It is input to the A / D conversion section 23 via and is converted into a digital signal. Then, the gamma correction circuit 24 corrects the gradation characteristic corresponding to the characteristic of the display unit 7 (or the display unit 11),
Input to the left-right reversing unit 6.

The left / right inversion unit 6 is provided for each color signal of R, G and B, and latch circuits 25 and 26, field memories 27 and 28, an up / down counter 29, a memory controller 30, a selector 31, and D / A conversion, respectively. It comprises the part 32.
The signal of each color from the gamma correction circuit 24 is latched by the latch circuit 25,
The field memories 27 and 28 are alternately input by the horizontal scanning operation 26 and recorded in the scanning order. Field memory 27, 28
Writes the signal of each horizontal scan by the up count of the up / down counter 29, and reads by the down count in the reverse order of the writing. The up / down counter 29 outputs an odd / even number (odd / eve) output from the memory controller 30 based on the horizontal synchronizing signal (H-sync) separated from the clock signal (clock) and the video signal.
n) Alternate to the field memories 27 and 28 according to the signal of
When one counts up, the countdown signal is output to the other, and at the same time, the write enable signal (RE) is alternately output to one of the field memories 27 and 28 and the output enable signal (OE) is alternately output to the other. .

That is, for example, at the time of odd-numbered horizontal scanning, writing is performed in the scanning order in the field memory 27 (arrow a), and at the same time, reading from the field memory 28 is performed in the reverse order of writing (arrow b), and even-numbered horizontal scanning is performed. At the same time, writing to the field memory 28 in the scanning order (arrow c) and reading from the field memory 27 in the reverse order of writing (arrow d) are performed at the same time. These field memories 27, 28
The signals of the respective horizontal scans read out are alternately switched by the selector 31 one horizontal scan at a time, and the D / A converter 32
Is input to the display unit 7, and is added to the display unit 7 to display an image in which the left and right sides of the original 3 are inverted. Display 7
The image light of is reflected by the half mirror 8 and enters the eyes of the speaker 2. Since the speaker 2 views the image reflected by the half mirror 8, that is, the image of the display unit 7 from the back side, the image in the direction of arrow A of the document 3 is changed to the direction of arrow B by the above-mentioned left-right reversal. When viewed, the image in which the left and right sides are the same as the original 3 can be seen.

FIG. 4 shows the composite video signal from the camera 4 as R,
It is a principal part block diagram at the time of processing into three color signals of G and B, and performing a horizontal inversion. Composite video signal output from camera 4
The Y / C separation unit 42 separates 41 into a luminance signal (Y) and a color signal (C), and the color signal is input to the color demodulation unit 43 and the blue difference signal (B-
Y) and red difference signal (RY). The blue color difference signal and the red color difference signal are combined with the luminance signal in the matrix circuit 44.
To the G / B / R three-color signals, and then input to the respective A / D converters 23 and converted into digital signals as in the case of FIG. Then, the data is input to the left / right reversing unit 6.

In the case of this configuration, the present invention can be applied to the one in which the video signal source is inputted as the luminance signal and the chrominance signal (“S” signal input), and in addition to the NTSC signal, the PAL or SECAM signal. Is also possible. In addition,
In the above example, the signal processing up to the A / D conversion unit 24 is performed in analog, but the A / D conversion unit is provided before the Y / C separation unit 42 to convert the composite video signal 41 into a digital signal. After that, the Y / C separation unit may separate the luminance signal and the color signal, and the color demodulation unit and the matrix circuit may process the digital three-color signal and apply it to the gamma correction circuit 24. Further, in each of the above examples, the analog signal converted by the D / A conversion unit 32 is input to the display unit 7 (or the display unit 11). However, the display unit inputs the digital signal. If it does, the D / A converter 32 is omitted.

[0014]

As described above, according to the prompter device of the present invention, after the video signal from the document image pick-up camera is converted into a digital signal, it is written in the scan order by the up-count of the up-down counter and the down-scan is performed. The count is read in the reverse order of writing,
This writing / reading can be done in two field memories
Since the read signals are applied to the display unit alternately by performing horizontal scanning, the display unit is set to PDP or LC.
It becomes possible to configure with a flat display such as D, and the prompter device can be configured to be thin and compact as compared with one using a CRT. For example, it is effective in the case where it is often used by moving. Exert.

[Brief description of drawings]

FIG. 1 is a configuration diagram of main parts of an embodiment of a prompter device according to the present invention.

FIG. 2 is a main part configuration diagram of another embodiment of the prompter device according to the present invention.

FIG. 3 is a principal block diagram of an embodiment of the signal processing and left / right reversing unit of the prompter device according to the present invention.

FIG. 4 is a block diagram of essential parts of another embodiment of the signal processing and left / right reversing unit of the prompter device according to the present invention.

[Explanation of symbols]

 1 Speaker (announcer) imaging television camera 2 Speaker 3 Original 4 Original imaging television camera 5 Signal processing section 6 Left / right reversing section 7 Display section 8 Half mirror 11 Display section 23 A / D conversion section 25 Latch circuit 27 Field memory 29 Up-down counter 30 Memory controller 31 Selector 32 D / A converter 42 Y / C separator 43 Color demodulator 44 Matrix circuit

Claims (9)

[Claims] 1. A television camera for capturing an image of a speaker,
A television camera for capturing an image of a document, a display unit for displaying on a screen based on a video signal from the television camera for capturing an image, a display unit mounted in front of the television camera, and displaying light from a speaker. A half mirror that transmits and reflects the image light from the display unit in the direction of the speaker,
A first A / D converter provided between the original image capturing television camera and the display unit for converting a video signal from the original image capturing television camera into a digital signal;
At least a pair of memories for alternately recording one frame of the signal from the A / D conversion unit for each horizontal scanning, and writing of signals for each horizontal scanning to each of the memories are performed in a scanning order,
An up / down counter for performing reading in the reverse order of writing, a selector for alternately switching the signals read from the memory in the scanning line order and inputting to the display unit, and a synchronization signal separated from the video signal as a reference And a left / right reversing unit composed of the pair of memories, an up / down counter, and a memory controller for controlling the selector. 2. The prompter device according to claim 1, wherein the right-and-left reversal unit is formed integrally with the display unit. 3. A latch circuit is provided at an output end of the first A / D conversion section, and a signal from the first A / D conversion section is alternately recorded in the pair of memories by one horizontal scan. Alternatively, the prompter device according to claim 2. 4. The prompter device according to claim 1, wherein the pair of memories are field memories that record at least one field. 5. A D / A conversion unit for converting a signal from a selector into an analog signal is provided in the left / right inversion unit, and the signal is displayed on the screen of the display unit based on the signal from the D / A conversion unit. The prompter device according to claim 1 or 2. 6. The prompter device according to claim 3, wherein the display unit has a display body composed of a plasma display panel. 7. The prompter device according to claim 3, wherein the display unit has a display body formed of a liquid crystal display panel. 8. A first Y // which separates a composite video signal from a document imaging television camera into a luminance signal and a color signal.
A C separation unit, a first color demodulation unit that demodulates into a required color difference signal based on the color signal from the first Y / C separation unit, and the first Y
A first matrix circuit for processing the three primary color signals of red, green and blue based on the luminance signal from the / C separation section and the color difference signal from the first color demodulation section is provided, and the signal from the first matrix circuit is converted into the first matrix circuit. The prompter device according to claim 6 or 7, wherein the prompter device is configured to be input to the 1A / D conversion unit. 9. A second A / D conversion section for converting a composite video signal from the original image pick-up television camera into a digital signal, and a second Y / Y section for separating the signal from the second A / D conversion section into a luminance signal and a color signal. / C separation section, and a second Y / C separation section for demodulating to a required color difference signal based on the color signal
A color demodulation unit and a second matrix circuit for processing into three primary color signals of red, green and blue based on the luminance signal from the second Y / C separation unit and the color difference signal from the second color demodulation unit are provided.
9. The prompter device according to claim 8, wherein the signal from the second matrix circuit is input to the first A / D conversion unit.