JPH0591484A - Television receiver - Google Patents

Abstract

PURPOSE:To obtain a television receiver having a display part with an aspect ratio of 9:16 so that the deterioration of image quality can be prevented when two screens of an image having an aspect ratio of 3:4 and that the distance between scanning lines can be prevented from getting rough when the image having an aspect ratio of 9:16 is vertically expanded and displayed. CONSTITUTION:Inputs 1 and 2 which are image signals having an aspect ratio of 3:4 is compressed to 1/2 in the horizontal direction and to 2/3 in the vertical direction and written in a memory part 4 by a 2-screen conversion part 2. A scanning line conversion part 3 enlarges the scanning line to 4/3 by writing the inputs 1 in the memory part 4 and converting the scanning line of the read- out signal. A switching circuit 5 switches between the signals converted by the 2-screen conversion part 2 and the scanning line conversion part 3 with a display switching signal and outputs the selected signal to a 9:16 display part 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a display section with an aspect ratio of 9:16.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a conventional example in which an image having an aspect ratio of 3: 4 is displayed on a television receiver using a display section having an aspect ratio of 9:16. First, FIG. 4 shows two screens A and B having an aspect ratio of 3: 4.
This is a case where a parent-child screen is displayed on a display unit having an aspect ratio of 9:16 (hereinafter referred to as a 9:16 display unit). The image A is compressed to 3/4 in the horizontal (horizontal) direction and is not compressed in the vertical (up / down) direction, and is displayed as the main screen by moving it to the left or right of the 9:16 display unit, and the image B is horizontally Are compressed to 1/4, vertically compressed to 1/3, and displayed as a child screen on the remaining 9:16 display.

Next, in FIG. 5, an image with an aspect ratio of 9:16 displayed on a display unit with an aspect ratio of 3: 4 is displayed at 9:16.
This is the case of displaying on the display unit. In FIG. 5, an image C is an image having an aspect ratio of 9:16, such as a movie, and in this case, there are no image portions above and below. This image C
Is displayed on the 9:16 display, the image is vertically expanded to 4/3 times by increasing the vertical deflection angle for driving the cathode ray tube used for the display, and is enlarged and displayed on the 9:16 display. can do.

[0004]

By the way, in the conventional example shown in FIG. 4, the area ratio between the parent screen A and the child screen B in the 9:16 display section is 9: 1, and the image information of the child screen B is It is lost significantly and the image quality deteriorates. As a result, there is a problem that it becomes difficult to read fine characters, for example. Further, in the conventional example shown in FIG. 5, since the image is vertically expanded by vertical deflection, for example, the image is NT.
In the case of the SC method, out of the 480 effective scanning lines, the image part scanning lines are 3/4, ie 360 lines. Therefore, in the 9:16 display unit, since the original 480 scanning lines are thinned out to 360 lines, there is a problem that the scanning line interval becomes coarser than in normal display and the image quality deteriorates. In addition, vertical extension display by vertical deflection is possible when a cathode ray tube is used for the display unit, but when a solid-state display panel (liquid crystal display, plasma display, etc.) in which display pixels are fixed on the panel is used. However, there is a problem that the display is fixed to 480 lines corresponding to the scanning line and cannot be changed to 360 lines display.

[0005]

The present invention has an aspect ratio of 9:16 in order to solve the above-mentioned problems of the prior art.
Display section and the first and second aspect ratios of 3: 4
A two-screen conversion unit for performing a two-screen display in which the respective images are reduced by the first and second input signals and simultaneously displayed on the display unit in the same size. One of the first and second input signals is supplied, and a scanning line conversion unit for performing vertically expanded display in which an image is vertically expanded and displayed on the display unit by increasing the scanning line of this signal. And a memory unit for accumulating image information output by the two-screen conversion unit or the scanning-line conversion unit, and a display switching signal are supplied, and the two-screen conversion unit and the scanning-line conversion unit are supplied by the display switching signal. A switching circuit for switching the signal converted by the display unit and outputting it to the display unit, and the two screen conversion unit or the scanning line conversion unit in the memory unit according to the display switching signal. By switching to accumulate one of image information force, there is provided a television receiver, characterized by switching the two-screen display and the vertical extension display.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A television receiver of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an example of the configuration of a television receiver of the present invention, and FIGS. 2 and 3 are diagrams showing a display screen of the television receiver of the present invention. 2 is a display example for solving the problem of the conventional example shown in FIG. 4, and FIG. 3 is a display example for solving the problem of the conventional example shown in FIG.

First, a display example for solving the problem of the conventional example shown in FIG. 4 will be described with reference to FIG. As shown in FIG. 2, both screens A and B are horizontally compressed to 1/2 and vertically compressed to 2/3, and are simultaneously displayed on the 9:16 display part in the same size as screens A and B. To do. As an example, NTSC
In case of system signal, 480 scanning lines of images A and B are 9: 1
The six display units display 320 scanning lines. As a result, the screen B is enlarged twice in the horizontal and vertical directions and the area is enlarged four times as compared with the conventional example shown in FIG. Therefore, the detail of the screen B is less deteriorated, and the screen A,
The two screens of B can be displayed with exactly the same image quality.

Next, a display example for solving the problem of the conventional example shown in FIG. 5 will be described with reference to FIG. In the present invention, vertical extension by vertical deflection is not performed, and as shown in FIG.
It is tripled and displayed on the 9:16 display section with 480 scanning lines. As a result, the scanning line interval, which is a problem of the conventional example shown in FIG. 5, does not become coarse.

Further, FIG. 1 shows the circuit configuration for realizing the 9:16 display described with reference to FIGS. 2 and 3.
Will be explained. As shown in FIG. 1, the television receiver of the present invention comprises a 9:16 display unit 1, a screen conversion unit 2,
The scanning line conversion unit 3, the memory unit 4, and the switching circuit 5 are provided. Two input signals, Input 1 and Input 2, are input to the 2-screen conversion unit 2, and the respective image information (input signals) are compressed to 1/2 in the horizontal direction and to 2/3 in the vertical direction. And write it in the memory 4. Then, the two screen conversion unit 2
Is read from the memory unit 4 and output to the switching circuit 5 so that a two-screen display as shown in FIG.

Further, the scanning line conversion section 3 writes one input signal, which is one input signal, into the memory 4, and
The written signal is read out from the memory unit 4, one interpolation line is added to every three scanning lines, and interpolation signal processing for converting into four scanning lines is performed and output to the switching circuit 5. As an example, in the case of an NTSC system input signal, 360 scanning lines are 4
Converted to 80 and output. As a result, the output signal is output as a signal that is vertically expanded 4/3 times.

The switching circuit 5 has an input 3 which is another input signal.
Also, although at least one of the two-screen conversion unit 2 and the scanning line conversion unit 3 is selected by the display switching signal, it is output to the 9:16 display unit 1. At this time, the display switching signal also controls the two-screen conversion unit 2 and the scanning line conversion unit 3, and the memory unit 4 shared by both conversion units 2 and 3.
In accordance with a signal displayed on the 9:16 display unit 1, one of the image information (input signal) is stored. It will be described below that the memory unit 4 can be shared in this way. In the two-screen display shown in FIG. 2, the accumulated image data amount is 320 scanning lines, and in the vertically expanded display shown in FIG. 3, the accumulated image data amount is 360 scanning lines.
If the scanning line conversion unit 3 has a memory capacity required, it can be shared.

The image compression or decompression described above can be realized by using a known resample signal processing technique or interpolation signal processing technique, and a detailed description thereof will be omitted. Further, it goes without saying that a screen display other than the above, for example, a parent-child screen display of the conventional example can be added as the screen display.

[0013]

As described in detail above, since the television receiver of the present invention is constructed as described above, the aspect ratio of 3: 4 in the case of the two-screen display according to the present invention.
2 screens of the same size with less deterioration of image quality 2
In addition to providing the screen display, in the case of the vertically expanded display, since the scanning line interval does not become coarse, it is possible to provide the vertically expanded display without deterioration of image quality.
Further, this vertically expanded display can be applied to a solid-state display panel in which display pixels are fixed. Further, since the memory unit required for the television receiver of the present invention can be shared by the two-screen display and the vertically expanded display, there is an extremely excellent effect such that the memory capacity does not become extremely large.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a display screen of the television receiver of the present invention.

FIG. 3 is a diagram showing a display screen of the television receiver of the present invention.

FIG. 4 is a diagram showing a display screen of a conventional television receiver.

FIG. 5 is a diagram showing a display screen of a conventional television receiver.

[Explanation of symbols]

 1 9:16 display unit 2 2 screen conversion unit 3 scanning line conversion unit 4 memory unit 5 switching circuit

Claims (1)

[Claims] 1. A display unit having an aspect ratio of 9:16, and first and second input signals having an aspect ratio of 3: 4 are supplied, and images respectively reduced by the first and second input signals are reduced. Then, a two-screen conversion unit for performing two-screen display in which the same size is simultaneously displayed on the display unit, and one of the first and second input signals is supplied, and a scanning line of this signal is supplied. A scanning line conversion unit for performing vertically expanded display in which an image is vertically expanded and displayed on the display unit by increasing the size, and image information output from the two-screen conversion unit or the scanning line conversion unit is accumulated. And a switching circuit that is supplied with a display switching signal and that switches the signals converted by the two-screen conversion unit and the scanning line conversion unit by the display switching signal and outputs the signals to the display unit. Composed of In accordance with the display switching signal, switching is performed so as to store either one of the image information output from the two-screen conversion unit or the scanning line conversion unit in the memory unit, thereby displaying a two-screen display and a vertically expanded display. A television receiver characterized by switching between and.