JPH0443787A - Video information transmitter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a video information transmitting device used in video conference systems, video telephones, and the like.

2. Description of the Related Art Conventionally, when transmitting video information, when the transmitting side monitors the transmitted video for confirmation, the transmitting side's receiver also plays back the video signal to be sent to the other party. FIG. 4 is a block diagram showing the configuration of equipment for monitoring on the transmitting side in such a case.

In such a system, as a result of viewing the monitor image,
There may be a need to manipulate an entity that appears on the video camera 1. For example, if something unintended is shown, it is necessary to remove it from the field of view of the video camera 1. Additionally, it is easier to see the part you want the other person to focus on if it is in the center of the display screen, so it is desirable to adjust the position of the object.

Particularly when using video as a means of face-to-face communication, the quality of the image affects the smoothness of communication, so it is essential to monitor the transmitted video and be able to correct the position and status of the entity. In this case, the entity, ie the sender, is usually located facing the video camera l.

Problems to be Solved by the Invention In the configuration shown in FIG. 4, since the signal is directly monitored from the image captured by the video camera 1, it is difficult for the sender to know the direction of the entity and the corresponding image on the monitor screen 4. It will be the opposite. For example, when a sender raises his or her right hand, the sender's left hand appears on the monitor screen.

When adjusting the position of an object according to such a monitor screen, the direction in which the object should be moved on the screen is different from the direction in which it actually needs to be moved in order to obtain a desirable image, making it easy to make mistakes in the adjustment work.

An object of the present invention is to provide a monitor screen that is less likely to cause errors when a video sender operates an entity while viewing the monitor screen.

Means for Solving the Problems To achieve this object, the present invention provides a video capture device, a video signal generation device that generates a video signal from the output of the video capture device, and a monitor for monitoring the output of the video signal generation device. A video information transmitting device having a transmission video monitor means and a video communication means for transmitting the output of the transmission video monitor means, comprising a mirror image generation means for generating a mirror image of the video transmitted by the video communication means, the output of the mirror image generation means being It is configured to be monitored by a transmission video monitor means.

In the above configuration, the present invention has a mirror image generation unit for a video to be transmitted in the video information transmitting device, and when checking the transmitted video, displays this mirror image on the screen of the transmitting side, so that the sender of the video can However, when operating the entity while viewing the monitor screen, it is possible to obtain a monitor screen that is less prone to errors.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a video information transmitting apparatus according to the present invention. The first example is
This is a configuration example in which the mirror image generation section of the video information transmitting device according to the present invention is implemented using an address control section.

In FIG. 1, a video input to a video camera l is converted into a video signal, and then a video switcher 2 converts the video into a video signal.
The output light is transmitted. On the sending side, video switcher 2
The address assigning section 5 assigns an address to the video signal outputted from the frame memory 3, and the video signal is stored in the frame memory 3 and then displayed on the monitor screen 4. Here, when the sender wishes to monitor the transmitted video for confirmation, he inputs a predetermined command through the command input section 7. The command input section 7 can be arbitrarily set to any suitable interface such as a mouse or a keyboard.

This command is sent to the video switcher control section 6 and the address control section 8, causing the video switcher 2 to output the transmission image, and a frame memory address is generated so that it becomes a mirror image of the original video. A simple example of an algorithm for generating this new frame memory address will be explained using FIG.

Frame memory addresses corresponding to the horizontal and vertical directions of the display are represented by X and Y coordinates, respectively. In Figure 2, the frame memory address at the upper left corner of the display area of the moving image stuck on the monitor screen is (1,,1), and the frame memory address at the lower right corner is (Ymax
, Xmax ), in normal mode, (
It is only necessary to set the address (ytXmax-X) to be generated at the timing when the address (ytx) was assigned. This method provides a mirror image of the original image.

FIG. 3 is a conceptual diagram showing the configuration of the second embodiment. The second embodiment is a configuration example in which the mirror image generation section of the video information transmitting apparatus according to the present invention is implemented using a line memory.

In FIG. 3, the video signal to be displayed on the monitor screen 4, both the received image and the transmitted image, is once stored in the line memory 9A or 9B for each signal corresponding to one horizontal scanning line on the monitor screen 4. It can be accommodated. Received video line memo 179AJ-i, FIF.

(First In First Out), and the transmission video line memory 9B is read out as FI LO (Fi LO).
rst In La5t Out). When the sender inputs a predetermined command from the command input section 7, the command is sent to the monitor screen switching section 10, and the image displayed on the monitor screen 4 can be switched. By assigning normal addresses to the outputs from line memories 9A and 9B, an image without mirror image processing is displayed when the received signal is reproduced, and a mirror image is displayed when the transmitted signal is monitored. become.

In such a video information transmitting device, when the sender adjusts the state of the entity by monitoring the mirror image of the transmitted picture,
If you want to move the object to the right on the monitor screen, just move the object to the right.

Furthermore, when it is desired to change the state on the right side of the monitor screen, there is no need to actually change the state on the sender's right hand side, and it is easy to link the sender's vision and actions.

By using a mirror image of the image when monitoring the transmitted video in this way, it is easier to adjust the position of the entity reflected on the video camera, and the system is improved in terms of human interface. I can do it.

Effects of the Invention As described above, the present invention provides a video recording means, a video signal generation means for generating a video signal from the output of the video recording means, a transmission video monitor means for monitoring the output of the video signal generation means, and a transmission video. A video information transmitting device having a video communication means for transmitting the output of the monitor means, comprising a mirror image generation means for generating a mirror image of the video transmitted by the video communication means, and configured to monitor the output of the mirror image generation means with the transmission video monitor means. Since the mirror image generator of the video to be transmitted is configured to display the mirror image on the screen of the sending side when checking the transmitted video, the sender of the video can operate the entity while looking at the monitor screen. When doing so, it is possible to obtain a monitor screen that is less prone to errors.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a first embodiment of the video information transmitting device according to the present invention, FIG. 2 is a conceptual diagram explaining the operation of the first embodiment of the video information transmitting device according to the present invention, and FIG.
The figure is a block wiring diagram showing a second embodiment of the video information transmitting apparatus according to the present invention, and FIG. 4 is a block wiring diagram showing a conventional video information transmitting apparatus. 1...Video camera, 2...Video switcher, 3
... Frame memory, 4... Monitor screen, 5...
Address assigning unit, 6... Video switcher control unit, 7
...Command input section, 8...Address control section, 9A
, 9B... line memory, 10... monitor screen switching unit, 11... video information transmitting device. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] a video signal generating means for generating a video signal from the output of the video photographing means; a transmission video monitor means for monitoring the output of the video signal generating means; and a video for transmitting the output of the transmission video monitor means. A video information transmitting device having a communication means, comprising a mirror image generation means for generating a mirror image of the video transmitted by the video communication means, and an output of the mirror image generation means being monitored by the transmitted video monitor means. Information transmitting device.