JPS63200681A - High definition television receiver - Google Patents

Abstract

PURPOSE:To effectively utilize the blank part of a video by displaying the past optional frame of the video of a present standard television as plural small display screens on the right or left blank part of a display screen where the video is not displayed and reducing the unnaturalness and the ugliness of the whole display screen. CONSTITUTION:When the video of the present standard television is displayed on a high definition television receiver, the length of the video on the display screen is arranged the same as the display screen not to miss the top end and the bottom end of the video on the display screen and one of the both sides of the display screen is arranged to be the blank part where the video is not displayed. Then the right or left side part on the display screen where the main video is not displayed can be effectively utilized by allowing an user to display the past optional frame of the video 13 of the present standard television selected with the aid of an auxiliary remote control device as the plural small display screens.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a high-definition television receiving device.

<Conventional technology> By displaying detailed television images on a large wide screen, high-definition television aims to provide new appeal such as power and presence that cannot be obtained with current television broadcasting. In recent years, interest has been 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 written as 5:3 below 16:9), 125 scanning lines, and the current This is different from standard television (4:3 aspect ratio, 525 scanning lines).

FIG. 3 shows a schematic configuration for displaying current standard television signals on a conventional high-definition television receiver. In FIG. 3, 21 is a current standard television signal input terminal, and 22 is a high-definition television signal input terminal.The current standard television signal is input to the current standard television signal input terminal 21, and then the signal conversion circuit 23 performs scan conversion to double the number of scanning lines from 525 to 1050. The converted signal and the high-definition television system signal are then switched by the switching circuit 30 and displayed on the high-definition display 31. FIG. 4 shows a current standard television signal that has been scan-converted on a high-definition display 31. In FIG.
is a high-quality display screen with an aspect ratio of 5:3.
Since the aspect ratio is different from the current standard television signal which has been scan-converted and has an aspect ratio of 4:3, the current standard television screen is 41 when the vertical length of the screen is the same, and the horizontal length of the screen is The screen 43 of the current standard television set at the same height is displayed on the high-definition display screen 41 as shown in FIGS. 4(a) and 4(b).

<Problems to be Solved by the Invention> However, in the above configuration, when the current standard television image is projected on the high-definition display 31, the fourth
As shown in Figure 4(a), no image is displayed on both the left and right edges (shaded areas) of the screen 41 of a high-definition display, or as shown in Figure 4(b), there is no image displayed on both the upper and lower edges (shaded areas) of the current standard television image. The problem is that the shaded area) is not displayed and necessary images are missing.

In view of the above problems, the present invention has been developed to match the vertical amplitude of the current standard television broadcast image to the vertical height of the high-definition television display screen when displaying the current standard television image on a high-definition display. In this case, the unnaturalness and unsightliness of the entire display screen caused by the missing portion of the horizontal image due to the difference in aspect ratio is reduced, and in addition, the missing portion of the image is effectively used. It is.

Means for Solving the Problems In order to solve the above problems, the high-definition television receiving device of the present invention uses a current standard television that has been scan-converted to a display capable of displaying high-definition television signals. The display screen is configured to display images of arbitrary frames in the past of the current standard television as a plurality of small screens on the left or right side of the display screen where the images are not displayed due to the difference in aspect ratio. It is characterized by what it did.

<Function> With the above configuration, the present invention, when displaying current standard television images on a high-definition television receiver, makes the vertical length on the screen the same so that the images at both the upper and lower ends of the screen are not missing. and set either the left or right edge of the screen as the part where no image is generated. By displaying past arbitrary frame images of current standard television selected by the viewer by operating the auxiliary remote control device as multiple small screens in this area, the main image on the left or right side of the display screen does not appear. Parts can be used effectively.

<Embodiment> A high-definition television receiving apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1(a) and 1(b) are diagrams showing images projected on the display screen (aspect ratio 5:3 or +6:9) of a high-definition television receiving device according to an embodiment of the present invention. be. In FIG. 1(a), 11 is the screen of a high-definition display, 12 is the part that displays the moving image (main video) of the current standard television, and 13 is the part that displays the still image of any past arbitrary frame of the current standard television. Up to three sub-screens can be displayed on the projected screen (sub-image). FIG. 1(b) is a diagram in which the main video and one of a plurality of sub-videos have been replaced, and a still image of any frame stored in the past can be enlarged and viewed.

FIG. 2 is a schematic diagram of a high-definition television receiving apparatus according to an embodiment of the present invention. In FIG. 2, 24 is an A that converts the current standard television signal into a digital signal.
25 is a frame memory for storing arbitrary frames of current standard television broadcasting; 26 is a D/A converter that converts the digital signal output from the frame memory 25 into an analog signal; 28 is a frame memory for storing arbitrary frames of the current standard television broadcast; control circuit for instructing storage and replacement of the parent screen and child screen; 29;
1 is a composite screen creation circuit, and the rest is the same as that of the conventional example shown in FIG.

Next, the operation of the high-definition television receiving apparatus configured as above will be explained.

The current standard television signal input manually from the current standard television signal input terminal 21 is subjected to signal conversion processing such as scan conversion by the signal conversion circuit 23, and is input to the composite screen creation circuit 29.

On the other hand, the branch signal of the input signal from the current standard television signal input terminal 21 is stored in the frame memory 25 via the A/D converter 24 according to an instruction from the control circuit 28 as an arbitrary frame desired by the viewer. /A converter 26. The signal is inputted to the composite screen creation circuit 29 via the signal conversion circuit 27.

2 input to the composite screen creation circuit 29 as described above.
The video signal of the system is controlled by the control circuit 2 according to the wishes of the viewer.
According to the instructions given from 8 to the composite screen creation circuit 29,
The images are synthesized into a form as shown in FIG. 1(a) or FIG. 1(b), and the synthesized image is displayed on a high-definition display 31 by a switching circuit 30 instead of a high-definition television signal.

<Effects of the Invention> As described above, according to the present invention, when displaying a current standard television signal on a high-definition television receiving device, a plurality of sub-screens are displayed on either the left or right side of the display screen where no image is displayed. By forming a sub-screen and displaying the video information of any previous frame as this sub-screen, and by replacing the main screen and sub-screen as necessary, firstly, it is possible to create a high-definition image without causing any gaps in the video of the current standard television signal. The display screen of the television receiver can be used effectively. In addition, a second advantage is that the viewer can later view the video information of any frame in the past that he or she has selected as necessary while viewing the current standard television broadcast, and can make effective use of the video information.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are diagrams showing the display state of a high-definition television receiving device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the schematic configuration of the same device, and FIG. 3 is a conventional FIG. 4 is a block diagram showing a schematic configuration of a conventional high-definition television receiver, and FIG. 4 is a diagram showing a state in which a current standard television signal is displayed on a conventional high-definition television receiver. 11... High quality display, 12... Main video (current standard television video), 13... Sub video (past arbitrary frame still image), 21... Current standard television signal input terminal, 22 ...High quality television signal input terminal, 23.27...Signal conversion circuit, 24...A
/D converter, 25...frame memory, 26...D
/A converter, 28... Control circuit, 29... Composite screen creation circuit, 30... Switching circuit, 31... High quality display. Patent applicant: Matsushita Electric Industrial Co., Ltd. Figure 1 +5

Claims (1)

[Claims] A signal conversion circuit that performs signal processing conversion such as scan conversion on a current standard television broadcast signal having a different aspect ratio from a high-definition television system signal, and a current standard television image output from the signal conversion circuit. When the signal is displayed as the main image on a display image capable of displaying a high-definition television system image, an arbitrary frame from the past of the current standard television is added to the missing part of the display image that occurs due to the difference in aspect ratio. The present invention further comprises a video storage circuit, a composite screen creation circuit, and a control circuit for displaying the video of the main video as a plurality of small screens, and replacing and displaying the main video and arbitrary past video of the plurality of small screens. A high-definition television receiving device featuring: