Image display system

Abstract

The invention relates to an image display system capable of displaying character image without outputting image. An image display system according to the present invention includes a host terminal (400) which is a terminal transmitting character code information, and an image display device (100) connected to the host terminal (400) through a network and displaying an image. The image display device (100) includes: an input source selecting means (1) as a first input means to which video signals are inputted, a network I / F means (5) as a first network interface means for receiving the character code information transmitted from the host terminal (400), a character image generating means (6) for generating a character image from the character code information in the network I / F means (5), an image synthesis means (3) synthesizing the video signals in the input source selecting means (1) and the character image in the character image generating means (6), and an image display means (4) displaying the image synthesized in the image synthesis means (3).

Description

technical field [0001] The present invention relates to an image display system for superimposing and displaying character images on display images. Background technique [0002] Generally, as a method of displaying characters on a display image, an image display device of a conventional image display system uses a vertical retrace period of an analog video signal to decode character code information superimposed in a specific horizontal scanning period. This method is widely used in subtitle broadcasts on television in the United States and Japan, video software, recording signals on DVDs, and the like. [0003] However, since these character code information is input to the image display device in the state of being added to the video signal, the character code information depends on the video signal, and there is a possibility that a user who does not prepare the image display device may be confused about the characters displayed on the image display device. Problems wit...

AI Technical Summary

Problems solved by technology

[0006] According to such a conventional method, the character code information added at the production stage of the video content is fixed, so in principle, the character code information cannot be processed, edited, etc. except for the creator of the video content.

Furthermore, in the improvement measure disclosed in Patent Document 1, in order to add character code information to the video signal, a dedicated device is required, and it is a relatively heavy burden for the user to prepare the device.

In addition, in order to use the character code information in the image display device, it is limited to the case of displaying the video signal to which the character code information is added, so the input signal of the image display device is limited, and there is a problem that the convenience is impaired.

[0007] And, in the case of wanting to provide character images to a plurality of image display devices at the same time, even if a video signal to which character code information is added is provided to each image display device, the display video also depends on the selection of the image display device (that is, the presence or absence of the image display device). The one video signal is selected, and the other video signal is also selected), so there is a problem that it is difficult to reliably display character images in all image display devices.

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