JPS62149287A - Video transmission device - Google Patents

Abstract

PURPOSE:To make unnecessary the setting of the background of a television conference in a television studio style by inserting an object image to a background image outputted from a background image output means, and outputting it from an output device to an input device at an opposite station through a communication line. CONSTITUTION:The image 2 of a conference room photographed with a color television camera 1, and the video signal of a background image 4 contained in a background image output means 3 are inputted to a chromakey device 5. The chromakey device 5 generates a clipping signal separating an object image 2a and an actual background image 2b from the image 2 of the conference room with a separation means 5a, clips the background image 4, and inserts the clipping object image 2a to the background image 4. Afterwards, the chromakey device 5 outputs the video signal in which the object image 2a is inserted to the background image 4 to a television conference device 6, and inputs it to a display 9 through a communication circuit 8, and a television conference device 7 at the opposite station. As a result, a picture image in which the object 2a is inserted to the background image 4 suitable for the television conference is displayed on the display 9 at the opposite station.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a video transmission device that transmits video images from distant locations over a communication line.

[Conventional technology]

Demand for videoconferencing has increased recently due to demands for reducing business travel expenses and eliminating downtime associated with business trips, and recent advances in image transmission technology have made videoconferencing possible.

However, in order to realize video conferencing, it is necessary to construct a video conference room in addition to electronic technology, but the requirements for configuring a video conference room are different from those for ordinary conference rooms. Requires special consideration.

Since a television conference uses a television camera to photograph the subject and displays the image on the display device of the other party, the requirements for the television conference room are such that they take into account the elements of a television studio. In other words, very delicate conditions are required in terms of brightness, hue, saturation, etc. for the subject and the background of this subject, and conditions that suit the electrical and optical characteristics of electronic devices such as television cameras and displays, and for smooth progress of the scene. It is necessary to create an indoor configuration that meets the psychological conditions necessary to achieve this goal.

[Problem that the invention seeks to solve]

In the conventional video transmission system, as mentioned above, the video conference room had to be designed with elements of a television studio in mind, and there were problems such as a large initial investment when introducing the video conference.

This invention was made in order to solve the above-mentioned problems, and it is a video transmission method that allows a video conference to be held in a simple conference room without having to pay much attention to the construction of the video conference room. The purpose is to obtain equipment.

[Means for solving problems]

The video transmission device according to the present invention uses a video processing device to separate a video of a conference room or the like captured by a television camera into a subject video and a background video, and adds the subject to the background video output from the background video output means. The video is embedded and output from the output device to the input device of the other station via the communication line.

[Effect]

The video transmission device according to the present invention extracts only the subject video from the video of a conference room etc. captured by a television camera,
A background image different from the background of the conference room, etc. is input to the image processing device from the background image output means, and the subject image is inserted into the background image and displayed on the display of the other station, so that the image is not captured by the TV camera. This eliminates the need for the background of a video conference to look like a TV studio.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In the drawings, 1 is a color television camera, 2 is an image of the conference room taken by the color television camera 1, 2a is a subject image,
2b is an actual background image, 3 is a background memory as a video output means, and 4 is a background image suitable for a conference stored in the background memory 3. Reference numeral 5 denotes a chroma key device having separation means 5a, 6 a television conference device (output device), 8 a communication line, 7 a television conference device (input device) of the other station, 9
is the display of the other station. The above chromakey device 5
constitutes a video processing device.

In the video transmission device configured as described above, first, the video 2 of the meeting room taken by the color television camera 1 (: d5 of the background video 4 stored by the background video output means 3)
1! :i#! The signal is input to the chromakey device 5.

With this input, the chromakey device 5 controls the video 2 of the conference room.
The separating means 5a separates the subject image 2a and the real background image f*2b to create a cutting signal, cuts out the background image 4, and separates the subject image 2a from behind! Video 4 (Inset 2.

Thereafter, the chromakey device 5 outputs a video signal into which the background video 4 (the two subject videos 2a are embedded) to the video conference device 6.The output video signal is transmitted to the video conference devices 6, 7
2 via communication line 8, is input to the display 9 of the other station, and the subject 2a is displayed in the background image 4 suitable for a video conference.
The image into which is inserted is displayed on the display 9 of the other station.

In the above example, the background image 4 is stored in the background memory 3, but instead, a background image output means is provided using a background suitable for a video conference and a television camera for photographing the background. It may also be configured as

Further, in the above embodiment, the chroma key device 5 and the video conference device 6 are shown separately, but the chromakey function may be added to the video conference device and configured as an integrated device. Any configuration C: may be used as long as the video signal embedded in the background can be sent to the teleconference device of the other station.

〔Effect of the invention〕

As described above, according to the present invention, a video transmission device that transmits a video of a subject at a remote location is equipped with a video processing device, and the video of the subject is inserted into the display (an inappropriate background video) of the other station and transmitted. As a result, there is no need to construct a conference room with elements of a television studio for, for example, a television conference.

[Brief explanation of drawings]

The drawing is a block diagram showing a video transmission device according to an embodiment of the present invention. In the figure, 1 is a color television, 2 is an image, 2a is a subject image, 2b is a background image, 3 is a background memory, 4 is a background image, 5 is a chromakey device, 5a is a separation means, 6 is an output device, 7 8 is an input device, 8 is a communication line, and 9 is a display. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A video transmission device that transmits a video of a subject at a remote location via a communication line, which includes a background video output means, a television camera that captures the video of the subject, and a video camera that converts the video captured by the television camera into the subject video and the background video. a video processing device that includes a separation means for separating the subject video into a background video output from the background video output device; an output device that outputs the video synthesized by the video processing device; Receives images from the device via a communication line,
A video transmission device comprising: an input device for displaying information on a display. (2) The video transmission device according to claim 1, wherein the background video output means comprises a background memory that stores a background video.