JPS6326174A - High definition television receiver - Google Patents

Abstract

PURPOSE:To effectively utilize the screen of a receiver by displaying the video image of the existing standard television system subjected to scanning conversion while selecting a pattern in matching with the lateral length of the pattern of the high definition display with different aspect ratio and the pattern in matching with the longitudinal length. CONSTITUTION:The titled receiver is provided with a 1st signal converter 13 converting the signal of the existing standard television system with different aspect ratio from the signal of the high definition television system based on the longitudinal length of the pattern of the high definition display device 21, a 2nd signal converter 16 converting it based on the lateral length of the pattern of the high definition display 21, a pattern switching circuit 17 switching the 1st and 2nd signal converters 13, 16 and a changeover circuit 14 switching the high definition television signal and the existing standard television signal outputted from the pattern switching circuit 17. Thus, the screen displaying the video image of the existing standard television system is selected. Thus, if an important image exists at the vertical edge of the pattern, the pattern is effectively utilized while the longitudinal length of the existing standard pattern is matched with the longitudinal length of the high definition display 21 and displaying the pattern on the screen of the high definition display 21 by leaving the horizontal edges of the pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a high definition television receiver.

Conventional technology High-definition television displays detailed television images on a large widescreen screen, seeking new appeal such as power and realism that cannot be obtained with current television broadcasting. There is growing interest in both. 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.
Current standard TV (4:3 aspect ratio, 5 scan lines)
26).

FIG. 3 shows a schematic configuration for displaying current standard television signals on a conventional high-definition television receiver. A current standard television signal is input to the current standard television signal input terminal 31, and then the signal converter 33 converts the scanning line into 5
Scan conversion is performed to double the number of lines from 26 to 1060 lines. Then, this converted signal and a high-definition television system signal input from the input terminal 32 are switched by a switching circuit 34 and displayed on a high-definition display 35.

Next, FIG. 2 shows a state in which the current new standard television screen that has been scan-converted is displayed on the high-definition display 36. Figure 2 shows the screen of a high-definition display 21 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, they cannot be displayed on the same screen as is. Can not. Therefore, a high-definition television receiving device in which the current standard television screen has the same vertical length as the high-definition television screen as shown in Figure 2a, or
As shown in Figure 2, the current standard television image is displayed on a high-definition television receiving device with the same horizontal length.

Problems to be Solved by the Invention However, in the above-mentioned high-definition television receiving device that displays the current standard television signal as shown in Figure 2 B, both the left and right ends (shaded areas) of the high-definition display screen. Nothing is displayed on the screen, the effective area of the screen becomes smaller, and the image on current standard TVs becomes smaller. Furthermore, as shown in Figure 2, high-definition television receivers that display current standard television signals have problems such as necessary images being sometimes missing. In view of the above problems, when displaying current standard television images on a high-definition display, it is possible to select which of the current standard TV screens depending on the displayed image.

Means for Solving the Problems In order to solve the above problems, the high-definition television receiving device of the present invention transmits scan-converted current standard television images to the side of the screen of a high-definition display having a different aspect ratio. The feature is that the screen can be displayed by selecting between a screen with the same length and a screen with the same vertical length.

Effect of the present invention With the above-described configuration, when displaying current standard television on a high-definition television receiving device, if there is no important image at the top or bottom of the image of the current standard television, the image on the side of the screen of the high-definition display is displayed. The length is the same, and the top and bottom vertical edges are omitted.

In addition, if there is important video on the top and bottom edges of the screen, there are ways to display it, such as making the vertical length of the high-definition display the same and projecting it on a screen that leaves the left and right edges of the high-definition display screen. Since it can be switched, the entire screen can be used effectively.

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 block diagram of a high-definition television receiving apparatus according to an embodiment of the present invention. In FIG.
The first thing that cannot be displayed on a high-definition display like 2L
16 is a second signal converter for displaying current standard television images on a high-definition display as shown in FIG. 2b; 17 is the first signal converter and the second signal converter. This is a screen switching circuit that displays current standard television images by switching the input terminals 11, 12. Method switching circuit 14. The high-definition display 15 is similar to that 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.

The current standard television signal inputted from the current standard television signal input terminal 11 is scan-converted by the first signal conversion device 13, and the signal is further converted into a screen as shown in FIG. 2a. Similarly, the current standard television signal is completely converted by the signal converter (2) 14 so that the screen appears as shown in FIG. 2b.

These two signal conversion devices are switched by the screen switching circuit 17, and further, the signal input from the high-definition television signal input terminal 12 and the signal output from the screen switching circuit 17 are switched by the all-system switching circuit 14. , is displayed on the high-definition display 15.

As described above, according to this embodiment, the high-definition television receiving device includes a first signal converting device that converts current standard television signals with different aspect ratios based on the vertical length of the screen, and By providing a second signal conversion device that converts based on the horizontal length of the screen and a screen switching circuit that switches between these, when displaying current standard TV images on a high-definition receiving device, the top and bottom edges of the screen can be If there are no important images, the images at the top and bottom can be omitted and displayed on a high-definition display screen, resulting in a more powerful image. Also, if there is important video on the top and bottom edges of the screen, the screen will be a little smaller, but the top and bottom edges will still be visible. This selection can be made arbitrarily, and the screen of the high-definition television receiver can be used effectively.

Effects of the Invention As described above, according to the present invention, when displaying current standard television signals on a high-definition television receiving device, when there are no important images at the top and bottom edges of the screen, the image 2 at the top and bottom edges of the screen is The screen of the high-definition television receiver can be used effectively by selecting between omitting the image and displaying it on the screen of a high-definition display and displaying the image at the top and bottom ends of the screen without missing it.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a high-definition television receiving apparatus according to an embodiment of the present invention, and FIG. 2a is a block diagram of a high-definition television receiving apparatus. FIG. 3b is a front view showing a current standard television signal displayed on a high-definition television receiver, and FIG. 3 is a block diagram of a conventional high-definition television receiver. 11...Current standard TV signal input terminal, 12.
...High-quality TV signal input terminal, 13...
First signal conversion device, 14... system switching circuit,
15...High quality display, 16...
Second signal conversion device, 17... Screen switching circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure (of) (b2゛

Claims (1)

[Claims] A first signal conversion device that converts a high-definition television system signal and a current standard television system signal having a different aspect ratio based on the vertical length of the screen of the high-definition display; a second signal conversion device that converts the length of the signal, a screen switching circuit that switches between the first and second signal conversion devices, and a current standard television signal output from the screen switching circuit and a high-definition signal. A high-definition television receiving device equipped with a switching circuit for switching television signals and capable of selecting a screen for displaying current standard television images.