JPH0282893A - High picture quality television receiver - Google Patents

Abstract

PURPOSE:To prevent a master picture from being overlapped on at least one slave picture or to reduce the overlap by providing a deflection angle variable deflection means, increasing the deflection angle of a wide display means at the operation of a PIP function so as to expand the aspect ratio. CONSTITUTION:The PIP function operation is applied, a wide detection signal is outputted from a wide detection section 9 based on its operation and the deflection angle of an electron beam of the wide display device 7 is increased by a deflection angle variable deflection circuit 8 corresponding to the aspect ratio of 5:3. On the other hand, a picture data is stored in an area corresponding to the aspect ratio of 4:3 in a wide pattern whose aspect ratio is 5:3 in a master memory controller 4. A picture data expanded based on the picture whose aspect ratio is 5:3 is stored in a slave memory controller 5. In the case of display control, the picture data is read out of both the memories 4, 5 and the master picture and the slave picture expanded partially are displayed on the picture whose aspect ratio is 5:3 without overlap.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is based on PIP (picture in pic).
high-definition television (HDTV) with
: Extended Definition TV), and for more details, eliminate the overlap between the parent screen and child screen,
Alternatively, it relates to a high-definition television that can display a wide image.

[Conventional Example] One of the high-definition television systems that improves the quality of terrestrial broadcasting images is the EDTV system. This HDTV system is N'r
It is an improved version of the SC system, and has the advantage of requiring less equipment costs for television broadcasting stations.

Each manufacturer is developing various types of high-definition televisions to improve picture quality and make viewing easier.

[Problem to be solved by the invention] By the way, the above-mentioned high-definition television is compatible with the current NTSC
PIP (picture
inρ1cture) function, as shown in FIG.

Two images can be displayed in the form of a main screen and a sub screen.

However, as is clear from the figure, since the child screen overlaps the main screen, part of the main screen becomes invisible.Moreover, as shown by the broken line in the figure, the child screen
There was a problem that when the screen size reached 4, the enjoyment of the main screen was halved.On the other hand, high-definition television has been proposed, and this high-definition television has an aspect ratio of 5:3. There is.

Therefore, as shown in FIG. 7, one screen is wide, and the image on that large screen is full of realism.

On the other hand, the high-definition television (HDTV) mentioned above.

The aspect ratio is fixed at 4:3, the same as current NTSC television. Therefore, as shown in FIG. 8, when displaying the wide image, a portion of the wide image inevitably becomes missing.

This invention was made in view of the above-mentioned problems, and its purpose is to provide a high-definition television that can eliminate or reduce the overlap between the main screen and the sub-screen, and can also display a wide image. Our goal is to provide the following.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a high-definition television having a PIP function, a wide display means with an aspect ratio of 5:3 or 16:9, and the wide display means. is provided with a variable deflection angle deflection means that can vary the deflection angle from an aspect ratio of 4:3 to 5=3 or 16:9, and when the PIP function is operated, the variable deflection angle deflection means deflects the wide display means. The angles are enlarged so that the aspect ratio is 5:3 or 16:9, the main screen with the aspect ratio of 4:3 and at least one child screen do not overlap, or the overlap is reduced, and the wide image When a signal is input, a wide image thereof is displayed.

[Function] With the above configuration, when the high-definition television is operated with parent/child screen (PIP function), the deflection angle in the wide display device is adjusted to an aspect ratio of 5:3 by the variable deflection angle deflection circuit.
Alternatively, it is made thicker to correspond to 16:9. When the scanning line beam is swung horizontally, the main screen and child screen are screens with an aspect ratio of 4:3, and the main screen is to the right or left of a screen with an aspect ratio of 5:3 or 16:9. sent to. On the other hand, the child screen is moved to a portion other than the parent screen so that it does not overlap with the parent screen, or is placed in a position where there is little overlap, making the parent and child screens easier to see. Furthermore, even if there is a plurality of child screens, the child screens are placed in areas other than the main screen in the same way as described above, so that they do not overlap with the main screen, or are placed in positions where there is little overlap.

Also, if the input signal includes a wide image signal,
Based on the wide detection signal, the aspect ratio of the wide display device is changed to 5:3 or 16:9 in the same way as described above in the variable deflection angle deflection circuit. In other words, the wide display device displays the wide image and displays the high-definition television (
Similar to the aspect ratio (5:3), it is possible to obtain realistic images.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. Although not shown, the high-definition television set is equipped with a tuner section that selects a television signal of a predetermined channel from among the broadcasts received by the antenna, and an intermediate frequency (IF) amplification section that amplifies the intermediate frequency of the television signal. It is being

In FIG. 1, a high-definition television has an input switch 1 that switches between NTSC, EDTV signals, and wide image signals of the television signal, and an input switch 1 that switches between NTSC, EDTV signals, and wide image signals of the television signal, and
TSC, E! A main screen processing section 2 that digitally processes a DTV signal and converts it into image data for the main screen; and a main screen processing section 2 that digitally processes a predetermined part of the main screen, or digitally processes a signal from another system, and converts it into image data for a sub screen. a child screen processing unit 3, a parent memory controller 4 in which the image data subjected to the parent screen processing is stored, a child memory controller 5 in which the image data subjected to the child screen processing is stored, and these parent memory controllers. 4, an output switch 6 that switches the image data read out from the child memory controller 5 in accordance with the predetermined operation, and an aspect ratio of 5:3 or 16:9 for converting the image data into analog and displaying the image. a wide display device 7; a variable deflection angle deflection circuit 8 for varying the deflection angle of the wide display device 7;
A wide detection section 9 is provided for detecting a wide signal based on a PIP function operation or a wide screen signal. In response to the wide detection signal, the deflection angle of the wide display device 7 is varied in the deflection angle variable deflection circuit 8, and the scanning of the electron beam of the wide display device 7 corresponds to an aspect ratio of 5:3 or 16:9. be changed.

Next, the operation of the high-definition television having the above configuration will be explained based on the display screens shown in FIGS. 2 to 5.

First, when a PIP function operation is performed and, for example, a part of the screen (main screen) based on an NTSC signal is enlarged and displayed on a sub screen, the wide detection section 9 outputs a wide detection signal based on the operation. Deflection angle variable deflection circuit 8
The deflection angle of the wide display device 7 is increased to correspond to a wide screen. That is, the deflection angle of the electron beam of the wide display device 7 is increased corresponding to the aspect ratio of 5:3. Note that the scanning time of the screen must be the same as when the aspect ratio is 4:3, so the scanning speed of the electron beam at the aspect ratio of 5:3 is the same as when the aspect ratio is 4:3.
: The speed is increased by the difference between 3 and 5=3.

On the other hand, the parent memory controller 4 has an aspect ratio of 5:
Image data is stored in an area corresponding to 4:3 of the wide screen of 3.3, and image data enlarged based on the screen with an aspect ratio of 5:3 is stored in the child memory controller 5. Namely.

The image data of the main screen is stored in the address area corresponding to the solid hatched area in FIG. 2, and the image data of the child screen is stored in the address area corresponding to the dashed hatched area in FIG. In one display control, image data is read from the parent memory controller 4 and the child memory controller 5, and the image data is switched by the output switch @6 and output to the wide display device 7. Then,
As shown in FIG. 2, on a screen with an aspect ratio of 5:3, the main screen and the partially enlarged child screen are displayed without overlapping. Note that nothing is displayed in the white part of the figure, and as shown in Figure 3, when the child screen due to the PIP function reaches 1/4 of the main screen, the overlapped part between the main screen and the child screen A will decrease. Furthermore, as shown in FIG. 4, a plurality of child screens can be displayed by using the remaining portion of the main screen.

In the above example, the case where the main screen is moved to the left side is explained, but it may be moved to the right side. Further, as shown in FIG. 5, for example, when the PIP function is not operated, it is preferable to move the screen with an aspect ratio of 4:3 to the center of the wide screen because the resolution is better toward the center of the cathode ray tube. in this case.

The electron beam of the wide display device 7 only needs to be swung from point B to point C, and this can be achieved by varying the deflection angle with the variable deflection angle deflection circuit 8.

Next, when a wide image signal is input and digitally processed, for example, a wide signal included in the signal is detected by a wide detection section 9. Then, based on the wide detection signal, the variable deflection angle deflection circuit 8 detects the wide display device 7.
The deflection angle of the electron beam is increased. That is, the screen of the wide display device 7 has an aspect ratio of 5:3. As a result, the manually created wide screen will be displayed as is without any missing parts.

It should be noted that the human signal is the current television signal, and the above PiP
When no functional operation is performed, the variable deflection angle deflection circuit 8 sets the wide display device 7 to a deflection angle with an aspect ratio of 4:3. That is, images of the current NTSC system are displayed in the same size as before.

[Effects of the Invention] As explained above, according to the present invention, a wide display device (aspect ratio of 5:3 or 16:9) and a deflection angle of this wide display device are provided in a high-definition television having a PIP function. Aspect ratio 4:3 to 5=3 or 1
A variable deflection circuit with a variable deflection angle of 6:9 is provided, and the PIP
When operating the function, the deflection angle of the wide display device can be adjusted to an aspect ratio of 5:3 or 16:9 using the variable deflection angle deflection circuit.
Since the size has been increased to correspond to NTSC format images, when the parent and child screens are displayed using the PIP function, there will be no overlap between the parent and child screens, or the overlap will be reduced, making the parent and child screens easier to see. effective.

Further, according to the present invention, even when inputting a wide image signal, the deflection angle of the wide display device is increased in accordance with the aspect ratio of 5:3 or 16:9 using the variable deflection angle deflection circuit, so that the wide image can be displayed. You can see it as it is.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial block diagram of a high-definition television showing an embodiment of the present invention, FIGS. 2 to 5 are screen diagrams illustrating display states of the high-definition television, and FIGS. FIG. 8 is a screen diagram illustrating the display state of a conventional high-definition television. In the figure, 1 is an input switch, 2 is a main screen processing section, 3 is a child screen processing section, and 4 is a main memory controller. 5 is a child memory controller, and 6 is an output switch. 7 is a wide display device, 8 is a deflection angle variable deflection circuit, and 9 is a wide detection section.

Claims (1)

[Claims] (1) A high-definition television with a PIP function, a wide display means with an aspect ratio of 5:3 or 16:9,
The deflection angle in this wide display means has an aspect ratio of 4:
and a variable deflection angle variable deflection means that can vary from 3 to 5:3 or 16:9, and when the PIP function is operated, the variable deflection angle deflection means increases the deflection angle of the wide display means to adjust the aspect ratio. 5:3 or 16:9, and the aspect 4
:3 The main screen of at least one child screen does not overlap or the overlap is reduced, and when a wide image signal is input, the wide image is displayed. High-definition television.