JP2829969B2 - High-definition television receiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-definition television receiver capable of receiving and displaying current standard television signals.

2. Description of the Related Art High-definition televisions seek to create new attractiveness and realism that cannot be obtained with current television broadcasting by displaying detailed television images on a large word screen. Interest is growing in each country. This high-definition television was proposed by the Japan Broadcasting Corporation (NHK).
16: 9, the current standard TV (525 scanning, aspect ratio
It is possible to project a finer image about 5 times as compared to 4: 3).

FIG. 4 shows a schematic configuration when a current standard television signal is projected on a conventional high-definition television receiver. The current standard television signal is input to the current standard television signal input terminal 42, and then the scanning line is
Scan conversion, etc., from 525 lines to twice as many as 1050 lines is performed. The converted signal and the high-definition television signal input from the terminal 41 are switched by the switching circuit 44 and displayed on the high-definition display 45.

Next, FIGS. 3A and 3B show a state in which the current standard television signal which has been scan-converted on the high definition display is displayed.
In FIG. 3, reference numeral 31 denotes a high-definition display screen having an aspect ratio of 16: 9, and a scan-converted aspect ratio of 4: 4.
Because the aspect ratio differs from the current standard TV signal of 3, the current standard TV screen 32 when the screen length is the same and the current standard TV screen when the screen width is the same 33 are displayed on the high-quality display screen 31 as shown in FIGS.

Problems to be Solved by the Invention However, a high-quality display having the above configuration
If the image of the current standard television signal is projected on the 45, it will be a large screen, but the image will be coarse, and for some kinds of images or depending on the user of the receiving device, the current standard There is a problem that it is more unfavorable than when a current standard television signal is projected on a television display.

The present invention has been made in view of the above-described problems, and when displaying an image of a current standard television signal on a high-definition display, the present invention corresponds to the fineness of a high-definition television image corresponding to the information amount of the current standard television signal. Projected on a screen of about the size, furthermore, effectively use the rest of the display screen, in addition to the unnaturalness of the entire display screen,
They try to reduce the ugliness.

Means for Solving the Problems In order to solve the above problems, a high-definition television receiver of the present invention has an area about one-quarter of the center of a display screen capable of projecting a high-definition television signal. The current standard television signal is projected on the screen.
Alternatively, a signal of the current standard television system is projected at an arbitrary position among the four divided areas of the display screen vertically and horizontally, and an image of a past arbitrary frame of the signal of the current television system is displayed on the remaining portion, At that time, a portion around each image can be projected as an arbitrary single color.

According to the present invention having the above-described configuration, when projecting an image of a current standard television signal on a high-definition television receiver,
The image is projected to a screen size commensurate with the current standard television signal so as not to be unsightly due to the rough texture of the image that would otherwise be produced when the image was scanned and converted to fit the large screen. When displayed in the center of the high-definition display, the surrounding area is displayed as an arbitrary single color, and when displayed on one of the four divided screens, the image of the past arbitrary frame is displayed on the remaining three, and the By projecting the surroundings as an arbitrary single color, effective use of the entire display and reduction of unnaturalness can be achieved.

Embodiment A high definition television receiver according to one embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1a and 1b are diagrams showing an image projected on a display screen of a high definition television receiver according to an embodiment of the present invention. In FIG. 1a, reference numeral 11 denotes a screen of a high-definition display, 12 denotes a portion for displaying an image of the current standard television, and 13 denotes a portion for displaying a single color. Here, an image of the current standard television is projected on a portion having an area of about one-fourth of the center of the high-definition display screen 11, and the entire periphery thereof is displayed as a single color display 13. In FIG. 1b, the screen 11 is divided into four parts, that is, up, down, left and right, and an image of the current standard television signal is projected on one of them. Here, reference numeral 14 denotes a portion for displaying a moving image (main video) of the current standard television, and 15
Is a portion that displays a still image (sub-image) of a past arbitrary frame of the current standard television, and the position of the main image 14 can be set arbitrarily. Of course, the surroundings of the main image 14 and the sub-image 15 are the single-color display 13.

FIG. 2 is a schematic configuration diagram of a high definition television apparatus according to one embodiment of the present invention. In the figure, 21 is a high-definition television signal input terminal, 22 is a current standard television signal input terminal, 23 and 27 are composite screen creation circuits, 24 is an A / D converter, and 25 is an arbitrary frame of the current television broadcast. Memory 26, a D / A converter 26, a control circuit 28 for storing a frame, setting the position of a main image / sub-image, and selecting a single color, and the others are those of the conventional example shown in FIG. Is the same as

The operation of the high-definition television receiver configured as described above will be described with reference to FIGS.

The current standard television signal input from the current standard television signal input terminal 22 is input to the composite screen creating circuit 23, and a single color portion of the color designated by the control circuit 28 is composited according to the viewer's request. . Then, it is displayed on the high-quality display 11 as shown in FIG.

On the other hand, the branch signal of the input signal from the current standard television signal input terminal 22 is input to the composite screen creation circuit 27,
In addition, the same branch signal is stored in the frame memory 25 via the A / D converter 24 in accordance with an instruction from the control circuit 28 at an arbitrary frame desired by the viewer, and is synthesized via the D / A converter 26 into the composite screen creation circuit 27. Is input to As described above, the two-system video signals input to the composite screen creating circuit 27 are provided with an instruction on the position of the video desired by the viewer and the color of the single color portion from the control circuit 28 to the composite screen creating circuit 27, Synthesized. Then, these synthesized current standard television images are
The high-definition television signal is displayed on the high-definition display 31 by the switching circuit 29 instead of the high-definition television signal. Composite screen creation circuit 23
Is selected as shown in FIG. 1a,
When the output of the composite screen creating circuit 27 is selected, the main image 14 and the sub-image (still image) 15 are displayed on the screen 11 as shown in FIG.

As described above, according to the present invention, when a current standard television signal is projected on a high-definition television receiver, the current standard television signal is projected on a screen having about one-fourth the area of the high-definition display, and When is set to one of four divisions, up, down, left, and right, by displaying the video information of the past arbitrary frame in the remaining part, and displaying a single color in the part around the video,
First, it is possible to project an image equivalent to the fineness of a high-definition television image on a screen of a size corresponding to the information amount of the current standard television signal, instead of a rough large-screen image, Second, unnaturalness and unsightlyness of the entire display screen can be reduced. Thirdly, there is an advantage that the viewer can view video information of an arbitrary frame in the past selected by the viewer while watching the current television broadcast as necessary and use the video information effectively.

[Brief description of the drawings]

1a and 1b are front views showing a display state of a high-definition television receiver according to an embodiment of the present invention, FIG. 2 is a block diagram showing a schematic configuration of the device, and FIG. FIG. 4 is a front view showing a state in which a current standard television signal is projected on a high-definition television receiver. FIG. 4 is a block diagram showing a schematic configuration of a conventional high-definition television receiver. 11 High-quality display, 12 Current standard television, 13 Monochrome display, 14 Main video, 15 Sub-video, 23
…… Synthesis screen creation circuit, 24 …… A / D converter, 25 …… Frame memory, 26 …… D / A converter, 27 …… Synthesis screen creation circuit, 28 …… Control circuit.

Claims (2)

(57) [Claims] In order to display a signal of the current standard television system on an approximately one-fourth area of the display screen at a central portion of a display screen capable of displaying a video of a high definition television system, The current standard television is reduced by reducing the vertical or horizontal length of a projection screen based on the signal of the current standard television system to half the vertical or horizontal length of the display screen. A high-definition television receiving apparatus, wherein a high-definition television signal is projected on the display screen and a peripheral portion thereof is projected as an arbitrary single color. 2. A display screen capable of projecting a high-definition television image is divided into four parts vertically, horizontally, and vertically. A current standard television signal reduced to one half of the vertical length of the screen is projected as a main image, and the remaining part of the current standard television signal in the past is displayed in the remaining portion. A high-definition television receiving apparatus characterized in that a video of a frame is displayed as a sub-video, and the four video images are projected as an arbitrary single color.