JPS63146672A - Television receiver - Google Patents

Abstract

PURPOSE:To attain effective utilization of pattern by selecting the aspect ratio of a display part of a display device the same as that of a displayed pattern so as to select a 4:3 pattern and the display pattern and to display them thereby displaying widely the display pattern and displaying a sub picture in case of the 4:3 pattern. CONSTITUTION:When an input signal is a display pattern signal, if the signal is displayed on the display device 19 without any processing, the pattern is expanded vertically by the blank existing upper/lower part of the pattern by a vertical amplitude control circuit 17, since a pattern expanded laterally is obtained. When an input signal is a 4:3 pattern signal, a pattern expanded laterally is displayed on the display device 19. In expanding vertically the same as the case with the video pattern signal, since the upper/lower picture is missing, the pattern is compressed horizontally by a time compression circuit 15. A control signal is fed to each circuit from a control signal generating circuit 18 to attain horizontal compression and vertical elongation in response to the input signal. In displaying the 4:3 pattern, although a blank exists at the left/right side of the pattern, a sub video signal is also inputted and the main pattern is biased to the left by the signal switching circuit 34 and the sub picture is displayed to display the remaining part on the excess part through the changeover.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a television receiver that displays images of standard format and other formats.

BACKGROUND OF THE INVENTION In recent years, televisions have become popular in households, and new appeals such as the power and presence of high-quality sound and images are required.

FIG. 6 shows a schematic configuration of a current standard television receiver. This inputs the current standard television signal, processes the signal, and displays the reproduced image on the display. Since the aspect ratio of the display part is 4:3, a horizontally long screen like a movie (hereinafter referred to as a movie screen) with a different aspect ratio of a conventional TV has a part with no image information above and below, as shown in Figure 7. (hereinafter referred to as blank) exists.

Problems that the invention aims to solve However, with the method described above, movies that are originally supposed to be wider and more powerful than a TV screen, but on the contrary, a blank screen that is the same horizontally than a normal TV broadcast screen. The vertical direction is reduced by that amount, and rather than being wide, the screen is smaller and less impressive.

In view of the above problems, the present invention makes the aspect ratio of the display the same as that of a movie screen, and has an aspect ratio of 4:
The current standard TV screen (hereinafter referred to as 4:3 screen) can be selected.

Means for Solving the Problems In order to achieve this object, the television receiving device of the present invention makes the aspect ratio of the display portion of the display the same as that of the movie screen, and selects between the 4:3 screen and the movie screen. It is configured so that it can be projected.

Function: With this configuration, a movie screen can be projected on the display without blanks. You can also switch to a 4:3 screen. The area of the movie screen displayed by conventional television receiving devices was smaller than that of a 4:3 screen, but with the present invention, the area of the movie screen is larger, without sacrificing the power of the movie screen. It can be projected.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a television receiver according to an embodiment of the present invention.

In FIG. 1, reference numeral 13 denotes an input switching circuit for switching between the input movie screen signal and the 4=3 screen signal;
4 is the same current signal processing device as in conventional televisions; 15 is a time compression circuit that reduces the horizontal width of the scanning line; 16 is a signal switching circuit that switches and outputs the original signal and the time-compressed signal;
17 is a vertical amplitude control circuit for controlling the vertical scanning width of the scanning line; 18 is an input switching circuit 13 and a signal switching circuit 16 for controlling the scanning area according to an input signal; A control signal generation circuit controls the vertical amplitude control circuit 17, and 19 is a display having the aspect ratio of a movie screen.

The operation of the television receiving apparatus configured as described above will be described below.

When the input signal is a movie screen signal, if it is displayed on the display 19 without any processing, it will be applied to a horizontally extended screen as shown in FIG. 3a, so the vertical amplitude control circuit 17 will
Stretch vertically by the blank space at the top and bottom of the screen, and
As shown in the figure, only the movie screen is displayed.

Next, when the input signal is a 4:3 screen signal, a horizontally extended screen is displayed on the display 19 as shown in FIG. 4a. If this is stretched vertically as in the case of a movie screen signal, the upper and lower images will be lost, so it must be compressed horizontally as shown in Figure 4. The time compression circuit 15 performs this. Horizontal compression depending on the input signal.

The control signal generation circuit 18 sends control signals to each circuit to perform vertical expansion.

As described above, according to this embodiment, a television receiver having the aspect ratio of a movie screen is provided with a time compression circuit 16 that compresses the screen in the horizontal direction and a vertical amplitude control circuit 17 that stretches the screen in the vertical direction. By providing a signal switching circuit 16 that switches these signals, movies can be displayed on a wide screen, even on a 4:3 screen, without missing images, and the quality of the movie screen can be maintained using current standard television broadcasting. .

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram of a television receiving apparatus showing a second embodiment of the present invention.

In the figure, 31 is a third signal input terminal, 32 is a fourth signal input terminal, and 33 is a sixth signal input terminal, which input a 4:3 screen signal that is not to be output as a sub-image (child screen). At the terminal, 34 is a signal switching circuit for switching the display of sub-pictures, and the other components are the same as those shown in FIG. 1, which is a block diagram of the first embodiment.

The operation of the television receiving apparatus configured as described above will be described below.

In the first embodiment, when a 4:3 screen is displayed, there are blanks on the left and right sides of the screen as shown in Figure 4, but a sub-video message is also input and the signal switching circuit 34 shifts the main screen to the left. , it can be switched to display a sub-image in the remaining area (Figure 5).

As described above, by providing the sub-video input and the signal switching circuit 34, the screen can be used more effectively.

Effects of the Invention As described above, according to the present invention, a movie screen can be displayed larger and wider than a 4:3 screen, and a 4:3 screen can also be displayed without losing the power of the movie screen. Also, 4:3
When the screen is on, a sub-image is displayed, making effective use of the screen.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a television receiver according to a first embodiment of the present invention, and FIG.
FIG. 3 is a block diagram showing the configuration of the television receiving device in the first embodiment of the present invention. FIG. 4C is a front view of the screen for explaining the principle of displaying images, and FIG. 6 is a front view showing a state in which sub-pictures are projected in the second embodiment of the present invention, FIG. 6 is a block diagram showing the configuration of a conventional television receiver, and FIG. FIG. 2 is a front view showing a state in which a movie is displayed on a conventional television receiving device. 11...First signal input terminal, 12...
Second signal input terminal, 13...Input switching circuit, 1
4...Current signal processing device, 15...Time compression circuit, 16...Signal switching circuit, 17...
... Vertical amplitude control circuit, 18 ... Control signal generation circuit, 19 ... Display with the same aspect ratio as a movie screen, 31, 32° 33 ...
Third. 4th. 6th signal input terminal (for sub video), 34...
...Signal switching circuit. Name of agent: Patent attorney Toshio Nakao and one other person
Moan Han 51・-eijbfb
Menu Guisplay 52-4: J video figure 3

Claims (2)

[Claims] (1) A first signal having a horizontally elongated display in which the aspect ratio of the reproduced image is different from the aspect ratio of the standard television signal, the reproduced image matching the aspect ratio of the horizontally elongated display, and a second signal that is the current standard television signal. A television receiving device that switches and displays the first signal and the second signal in accordance with the vertical direction of the horizontally long display without missing information of the first signal and the second signal. (2) The television according to claim 1, further comprising means for displaying an image having a content different from the first signal and the second signal on the remaining portion of the display section of the horizontal display while projecting the second signal. John receiving device.