JP2718306B2 - Television receiver - Google Patents

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 having 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). Image A is compressed to 3/4 in the horizontal (horizontal) direction, not compressed in the vertical (vertical) direction, and displayed as the parent screen by shifting it to the left or right of the 9:16 display unit, and image B is displayed in the horizontal direction The image is compressed to 1/4 in the vertical direction and 1/3 in the vertical direction, and is displayed as a sub-screen on the remaining portion of the 9:16 display unit.

FIG. 5 shows an image having an aspect ratio of 9:16 displayed on a display section having an aspect ratio of 3: 4.
This is a case where the information is displayed on the display unit. In FIG. 5, an image C is an image having an aspect ratio of 9:16, such as a movie. This image C
Is displayed on the 9:16 display section, the image is vertically expanded 4/3 times by increasing the vertical deflection angle for driving the cathode ray tube used for display, and is enlarged and displayed on the 9:16 display section. can do.

[0004]

In the conventional example shown in FIG. 4, the area ratio between the main screen A and the sub-screen B in the 9:16 display unit is 9: 1, and the image information of the sub-screen B is Significantly lost and image quality deteriorates. As a result, for example, there is a problem that it is difficult to read fine characters and the like. Further, in the conventional example shown in FIG. 5, an image is expanded in the vertical direction by vertical deflection.
In the case of the SC system, among the 480 effective scanning lines, the number of scanning lines in the image portion is 360, which is 3/4. Therefore, in the 9:16 display section, the original 480 scanning lines are thinned out to 360 lines, so that the scanning line interval becomes coarser than in the normal display, and the image quality is deteriorated. In addition, vertical 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. Has a problem that the display is fixed at 480 lines corresponding to the scanning lines and cannot be changed to the 360 lines display.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention has an aspect ratio of 9:16.
And a scanning line 480 having an aspect ratio of 3: 4.
The first and second input signals of the book are supplied, and an image based on the first and second input signals is processed by digital signal processing, respectively.
A two-screen conversion unit for performing a two-screen display in which the image is reduced to 水平 in the horizontal direction and ／ in the vertical direction and is simultaneously displayed on the display unit in the same size and arranged in the horizontal direction at the same time. And one of the first and second input signals is supplied, and 360 scanning lines in this signal are subjected to digital signal processing.
A scanning line conversion unit for performing vertical expansion display in which an image is expanded in the vertical direction and displayed on the display unit by increasing the size by 4/3, and the two-screen conversion unit or the scanning line conversion unit. The two-screen conversion unit for storing image information to be output
A memory unit shared by the scanning line conversion unit and a display switching signal are supplied, and the signals converted by the two-screen conversion unit and the scanning line conversion unit are switched by the display switching signal and output to the display unit. A switching circuit; and the memory
Scan line conversion by the scan line conversion unit.
The memory capacity required for the two screens is switched by storing either image information output from the two screen conversion unit or the scanning line conversion unit in the memory unit in accordance with the display switching signal. there is provided a television receiver which is characterized by being configured to switch selectively the display and the vertical extension display.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a television receiver according to the present invention will be described 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 display screens 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 problems of the conventional example shown in FIG. 4 will be described with reference to FIG. As shown in FIG. 2, the screen A, and compressed B to 1/2 together horizontally compressed to 2/3 in the vertical direction, the screen A, the same time to the 9:16 display unit in B the same size Display horizontally . As an example, in the case of the NTSC signal, 480 scanning lines of the images A and B are displayed by 320 scanning lines on the 9:16 display unit. Thus, the screen B is enlarged twice in the horizontal and vertical directions and quadrupled in area as compared with the conventional example shown in FIG. Therefore, it is possible to display the two screens A and B with exactly the same image quality, with little deterioration of the details of the screen B.

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

Further, a circuit configuration for realizing the 9:16 display described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 1, the television receiver of the present invention has a 9:16 display unit 1, a screen conversion unit 2,
It has a scanning line conversion unit 3, a memory unit 4, and a switching circuit 5. The two-screen conversion unit 2 receives two input signals, input 1 and input 2, and compresses each image information (input signal) in the horizontal direction to デ ジ タ ル by digital signal processing and in the vertical direction by 2 / 3 and writes it to the memory 4.
Then, the two-screen conversion unit 2 reads out the data from the memory unit 4 so as to display the two-screen display as shown in FIG.
Output to

The scanning line conversion unit 3 writes the input 1, which is one of the input signals, into the memory 4, and
The written signal is read from the memory unit 4 and added for every three scanning lines to convert it into four scanning lines.
Interpolation signal processing by digital signal processing 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 converted into 480 lines and output. As a result, the output signal is output as a signal expanded 4/3 times in the vertical direction.

The switching circuit 5 has an input 3 which is another input signal.
However, at least one of the two-screen conversion unit 2 and the scanning line conversion unit 3 is selected by the display switching signal and 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 these conversion units 2 and 3.
Stores either one of the image information (input signal) in accordance with the signal displayed on the 9:16 display unit 1. The fact that such sharing of the memory unit 4 is possible will be described below. In the case of the two-screen display shown in FIG. 2, the accumulated image data amount is equivalent to 320 scanning lines, and in the case of the vertically expanded display shown in FIG. 3, the accumulated image data amount is equivalent to 360 scanning lines.
If the memory capacity required for the scanning line conversion unit 3 is available, it can be shared.

The above-described compression or decompression of an image can be realized by using a known resampling signal processing technique or interpolation signal processing technique, and a detailed description thereof will be omitted. It is needless to say that a screen display other than those described above, for example, a conventional parent-child screen display, etc. 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, in the case of the two-screen display according to the present invention, the aspect ratio is 3: 4.
2 screens of the same size with little image quality degradation
A screen display can be provided, and in the case of vertically expanded display, the scanning line interval does not become coarse, so that vertically expanded display without deterioration in image quality can be provided.
Also, there is no need to control the deflection circuit to control the display amplitude
Therefore, the two-screen display and the vertically-extended 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 for the two-screen display and the vertically expanded display, there is an extremely excellent effect that the memory capacity does not become extremely large.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one 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 Scan line conversion unit 4 Memory unit 5 Switching circuit

Claims (1)

(57) [Claims] 1. A display section having an aspect ratio of 9:16 and first and second input signals of 480 scanning lines having an aspect ratio of 3: 4 are supplied, and the first and second input signals are supplied. Image by digital signal processing
A two-screen conversion unit for performing a two-screen display in which the image is reduced to に in the direction and ／ in the vertical direction and is simultaneously displayed in the display unit in the same size and arranged in the horizontal direction at the same time; Either one of the second input signals is supplied, and 360 scan lines in this signal are converted to digital signals.
A vertically elongated display scanning line conversion unit for performing that by increasing 4/3 times by the processing and displaying the extended image in the vertical direction on the display unit, Ri by the 2-screen conversion section or the scanning line conversion part The two-screen converter for storing output image information and the scanning line
A memory section shared with the conversion section , a display switching signal supplied, and a switching circuit for switching the signals converted by the two-screen conversion section and the scanning line conversion section according to the display switching signal and outputting to the display section. It has a memory capacity of the memory section, according to the scanning line conversion part
The memory capacity required for scanning line conversion is set, and switching is performed so as to store either image information output from the two-screen conversion unit or the scanning line conversion unit in the memory unit according to the display switching signal. Selectively switching between two-screen display and vertical expansion display
A television receiver characterized by having such a configuration .