JPS62263780A - High definition television receiver - Google Patents

Abstract

PURPOSE:To effectively use a display screen without omission of a video by projecting the video of other external device on a screen part on which the video is not produced according to the difference in an aspect ratio when projecting the video of an existing standard television. CONSTITUTION:On the screen 11 of a high definition display 25, the video projecting part 12 of the existing standard television and the video projecting part 13 of the external device such as a door camera, a video tape recorder are provided. Signals are respectively inputted from an existing standard television signal input terminal 21, and an external device video signal input terminal 26 and the conversion of a signal such as the respective scanning conversions is carried out by a signal converter 23 and a synthesizing video is formed by a synthesizing screen forming device 27. The signal and the signal of a high definition television system inputted from a signal input terminal 22 are changed over by a change over circuit 24 to display on the high definition display 25.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a -definition television receiving apparatus.

Conventional technology High-definition television displays detailed television images on a large wide screen to provide new appeal such as power and realism that cannot be obtained with current television broadcasting. Interest is increasing in all countries. This high-definition television was proposed by the Japan Broadcasting Corporation (NHK), and has a screen aspect ratio of 5:3 or 16:9 (hereinafter referred to as 6:3) and a scanning line of 112.
The number of lines is 5, which is different from the current standard television (4:3 aspect ratio, 525 scanning lines).

The strategic configuration for displaying the current standard television signal on a conventional high-definition television receiving device is shown in FIG. Next, the signal conversion device 43 performs scan conversion to double the number of scan lines from 526 to 1060. Then, this converted signal and a high-definition television system signal input from the input terminal 42 are switched by a switching circuit 44 and displayed on a high-definition display 45.

FIG. 3 shows a scan-converted current standard television signal displayed on a high-definition display 45.

In Fig. 3, 31 is the screen of a high-quality display 46 with an aspect ratio of 5:3, and since this and the scan-converted current standard television signal with an aspect ratio of 4:3 have different aspect ratios, the vertical length of the screen is The current standard television screen 329 is displayed on the high-quality display 45 like the current standard television screen 33 when the horizontal lengths of the screen are the same.

Problems to be Solved by the Invention However, when the image of the current standard television is projected on a high-definition display with the above-described configuration, as shown in Fig. However, there are problems in that the image is not displayed, or as shown in Figure 3, both the upper and lower ends (shaded areas) of the current standard television image are not displayed, resulting in missing necessary images.

In view of the above-mentioned problems, the present invention has been developed so that when displaying current standard TV images on a high-definition display, the images at both the left and right ends of the screen are not cut off due to the difference in aspect ratio, and the images at both the left and right ends of the screen are not lost. It is an attempt to make effective use of parts.

Means for Solving the Problems In order to solve the above-mentioned problems, the high-definition television receiving device of the present invention displays current standard television images that have been scan-converted, and also displays images on the screen due to differences in aspect ratio. The present invention is characterized in that at least one of images from an external device such as another door camera or a video tape recorder is projected onto a portion where no image is generated.

According to the above-described configuration, the present invention makes it possible to make the vertical length of the screen the same so that the images at both the top and bottom ends of the screen are not cut off when displaying current standard television images on a high-definition television receiving device. By setting either the left or right edge of the screen as an area where no image is generated, and projecting the image from an external device such as a door camera or video tape recorder onto this area, the display can be effectively used without missing any necessary images. It can be used for.

Embodiment Hereinafter, a high-definition television receiving apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an image projected on the screen of a high-definition display receiving device according to an embodiment of the present invention.

In FIG. 1, 11 is a high-definition display screen;
Reference numeral 2 denotes a portion that displays images from a current standard television, and 13 represents a portion that displays images from an external device such as a door camera or a video tape recorder.

FIG. 2 is a schematic diagram of a high-definition television receiving apparatus according to an embodiment of the present invention. In the figure, 26 is an external device video signal input terminal, 27 is a composite screen creation device that creates a composite screen of the current standard television signal and external device video signal, and other input terminals 21, 22, signal converter 23, switching The circuit 24 and high-quality display 26 are the same as those of the conventional example.

The operation of the high-definition television receiving apparatus configured as described above will be described below with reference to FIGS. 1 and 2.

Current standard TV signal input terminal 21. Signals are inputted from external device video signal input terminals 26, each signal is converted such as scan conversion by the signal conversion device 23, and a video as shown in FIG. 1 is created by the composite screen creation device 27.
This signal and high-definition television system signal input terminal 22
The switching circuit 24 switches the input high-definition television system signal to display it on the high-definition display 25. In FIG. 1, two types of external device video signals can be displayed. Two input terminals 26 may be provided, and a video signal from, for example, a door camera may be applied to one, and a video signal from a video tape recorder may be applied to the other.

As described above, according to this embodiment, a high-definition television receiving device includes a signal conversion device 23 that performs scan conversion of a current standard television signal and an external device video signal, and a composite screen creation device 27 that synthesizes these images. By providing a switching circuit 24 that switches between this composite image and the high-definition television image, it is possible to display the current standard television image on the high-definition television device without missing the image. It is possible to effectively utilize the screen of a high-definition television receiving device.

Effects of the Invention As described above, according to the present invention, when displaying the current standard television signal on a high-definition television receiver, the video signal is not dropped and other door cameras and video signals are displayed on the entire display screen. The display screen of the high-definition television receiver can be effectively used since it can be displayed together with at least one image among the video signals from a tape recorder or the like.

[Brief explanation of drawings]

FIG. 1 is a front view showing the display state of a high-definition television receiver according to an embodiment of the present invention, FIG. 2 is a block diagram of the same device, and FIGS. 3a and 3b are conventional high-definition television receivers. A diagram showing the current standard television signal projected on the
FIG. 4 is a block diagram of a conventional high-definition television receiver. 11...High quality display, 12...
-Current standard television video projection unit, 13...Video projection unit of external device, 26...External device video signal input terminal, 27...Composite screen creation device. Name of agent: Patent attorney Toshio Nakao and one other person
1 figure

Claims (1)

[Claims] A first current standard television broadcast signal with a different aspect ratio from a high-definition television system signal, and a second external device signal that is a current standard television signal are input, and signal conversion such as scan conversion is performed for each. a signal conversion circuit that performs
The image of the first current standard television broadcast signal is projected on the left or right side of a cathode ray tube screen capable of displaying a high-definition television system image signal, and the image is displayed on the right or left side of the screen depending on the difference in aspect ratio. a composite screen creation circuit that combines a plurality of different videos from a second external device so that they can be displayed; a high-definition television comprising a switching circuit for supplying a signal to a cathode ray tube, and configured to project on the cathode ray tube screen at least one of an image of a first current standard television broadcast signal and an image of a second external device. Receiving device.