JPH0414978A - Television system converter - Google Patents

Abstract

PURPOSE:To confirm whether or not a pattern extracting position is in a prescribed position by providing a means displaying whether or not a pattern extracting position is in a prescribed position in the zoom mode to the device. CONSTITUTION:A display device 31 has a function displaying whether the conversion mode is the wide mode or the zoom mode and a function displaying whether or not a pattern extracting position is in the center of the pattern (standard position) in the zoom mode. The display functions are controlled by a controller 18 based on the conversion mode designated by a conversion mode changeover switch 19 and a pattern extracting position designated by an extracting position horizontal moving switch 21. Thus, even when the pattern extracting position is revised, whether or not a pattern extracting position is in a prescribed position is confirmed by observing the display means 31.

Description

[Detailed Description of the Invention] CObject of the Invention] (Industrial Application Field) This invention provides a method for transmitting a television signal of a first television system to a second television system having a different aspect ratio from that of the first television system. The apparatus relates to a device for converting a television signal into a television signal of a first television system, and in particular a television system that converts a television system so that a part of the screen of a first television system becomes the entire screen of a second television system. The present invention relates to a system conversion device.

(Industrial Application Field) In recent years, high-definition television having a different aspect ratio from the current television system (hereinafter referred to as the current system) has been proposed as a next-generation television system.

The high-definition system, which is one type of high-definition television, has an aspect ratio of 16:9, which is wider than the current system, which has an aspect ratio of 4:3.

With the advent of this high-definition system, television system converters that allow high-definition system broadcasts to be received by current television receivers, and television systems that allow high-definition system broadcasts to be received by high-definition television receivers, are needed. A John system conversion device has been developed.

Figure 4 shows a high-definition television signal (hereinafter referred to as
1 shows the configuration of a conventional television format conversion device for converting a high-definition signal (hereinafter referred to as a high-definition signal) into a television signal of a current format (hereinafter referred to as a current signal).

The illustrated device has two conversion modes, a so-called zoom mode and a wide mode.

Here, zoom mode refers to a high-definition screen (
This is a mode in which format conversion is performed so that part of the high-definition screen (hereinafter referred to as the high-definition screen) becomes the entire screen of the current format (hereinafter referred to as the current screen).

This situation is shown in FIG. In the figure, 101 is a high-definition screen, and 102 is a portion extracted from this high-definition screen 101 for format conversion. In this way, in the zoom mode, a portion 102 with an aspect ratio of 4:3 is extracted from the high-definition screen 101 and displayed as the current screen.

On the other hand, wide mode is a mode in which format conversion is performed so that the entire high-definition screen becomes part of the current screen. This situation is shown in FIG. In the figure, 20
1 is a monitor of the current system, and 202 is this monitor 20
This is the part where the high-definition screen is displayed on 1. In this way, in the wide mode, the entire high-definition screen with an aspect ratio of 16:9 is displayed, for example, in the center of the monitor 201 with an aspect ratio of 4:3.

Now, the configuration of FIG. 4 having such two conversion modes will be explained.

In the figure, 11 is an input terminal to which a high-definition signal S is supplied. The high-definition signal S1 supplied to this input terminal 11 is transmitted using a sub-sample transmission method, so-called M
U S E (Multiple Subsamp I
Bandwidth is compressed using the e Sailing Encoding method. Therefore, this high-definition signal S1 is partially returned to the original high-definition signal S2 by the field interpolation circuit 12.

This high-definition signal S2 undergoes zoom mode format conversion by the scanning line conversion circuit 13 and left/right truncation/time axis conversion circuit 14, and also undergoes wide mode format conversion by the scanning line conversion circuit 15 and upper and lower panel addition circuits 16.

When converting the zoom mode, first, the number of scanning lines is 1.
125 high-definition signals S2 are sent to the scanning line conversion circuit 13
This is converted into a signal S3 having 525 scanning lines according to the current system. This signal S is converted into a current signal S4 with an aspect ratio of 4:3 by a left/right truncation/time axis conversion circuit 14. That is, the left/right truncation/time axis conversion circuit 14 is
First, the shaded portion 103 in FIG. 5 is cut off from the signal S3, and a portion 102 having an aspect ratio of 4:3 is extracted. Next, the time axis of this portion 102 is transformed to obtain the current signal S4 in zoom mode.

Note that the shaded portion 103 is truncated based on a timing signal S8 supplied from a controller 18, which will be described later.

On the other hand, in wide mode format conversion, first, the high-definition signal S2 is converted by the scanning line conversion circuit 15 into a signal S having the number of scanning lines (for example, 375) in the portion 202 of FIG. Next, this signal S5 is sent to the upper and lower panels 20 in FIG.
A signal corresponding to 3 is added and output as the wide mode current signal S6.

Current signal S4. S6 is supplied to the selection circuit 17, and is selectively selected based on the conversion mode specified by the user. This conversion mode is designated by operating the conversion mode changeover switch 19. controller 18
controls the selection operation of the selection circuit 17 so that when the switch 19 is operated by the user, the current signal of the designated conversion mode is selected. This selects the current signal of the conversion mode specified by the user.

The selection output S7 of the selection circuit 17 is supplied to an output terminal 201 and is used for image display.

By the way, in the apparatus shown in FIG. 4, the position from which the high-definition screen 101 is taken out can be changed freely in the zoom mode. That is, when the user operates the take-out position left/right movement switch 21, the controller 18 changes the phase of the timing signal S8 accordingly. Thereby, the screen extraction position can be moved from the standard position (center of the screen) shown in FIG. 5 to the right side, for example, as shown in FIG. 7.

As described above, in the conventional television format conversion device, the position from which the high-definition screen is taken out can be changed freely.

However, with this device, it is not possible to confirm where the screen extraction position is set, and therefore it is not possible to know whether the current screen extraction position is a standard position.

(Problem to be Solved by the Invention) As described above, in the conventional television format conversion device, although the screen extraction position in zoom mode can be changed, the current screen extraction position is set to a predetermined position such as the standard position. There was a problem that it was not possible to confirm whether the

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a television format conversion device that can confirm whether the screen extraction position in zoom mode is at a predetermined position or not.

[Structure of the Invention (Means for Solving the Problem) In order to achieve the above object, the present invention is provided with a means for displaying whether or not the screen extraction position in the zoom mode is a predetermined position. be.

(Function) According to the above configuration, even if the screen take-out position is changed, it can be confirmed whether the screen take-out position is at a predetermined position by looking at the display means.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention.

This embodiment, like the previous FIG. 4, shows a typical case in which the present invention is applied to an apparatus having a wide mode in addition to a zoom mode.

In FIG. 1, the same parts as in FIG. 4 are given the same reference numerals.

In FIG. 1, the difference from the previous FIG. 4 is that the display device 3
1 has been newly added, and a control function for the display device 31 has been added to the controller 18.

The display device 31 has a function of displaying whether the conversion mode is wide mode or zoom mode, and a function of displaying whether the screen extraction position is at the center of the screen (standard position) in zoom mode. These display functions are controlled by the controller 18 based on the conversion mode specified by the conversion mode changeover switch 19 and the screen extraction position specified by the extraction position left/right movement switch 21.

Figure 2 shows the display screen in wide mode.

As shown in the figure, the wide mode is represented by a figure 10 indicating this mode.
1 and the characters rWIDEJ102.

FIG. 3 shows the display screen in zoom mode.

As shown in the figure, the zoom mode is represented by a figure 20 indicating this mode.
1 and the characters “ZOoM” 202. Further, on this display surface, a mark 203 is displayed when the screen extraction position is set at the center of the screen, and when it is not set, the mark 203 is not displayed. Therefore, depending on whether or not this mark 203 is displayed, it is possible to know whether the screen extraction position is set at the center of the screen.

In the above description, a case has been described in which it is displayed whether or not the screen extraction position is set at the center of the screen. However, in the present invention, it may be possible to display whether or not the image is set at a predetermined location other than the center, such as the right end or left end, for example.

Furthermore, it goes without saying that the display method on the display screen is not limited to the configuration shown in FIG.

Further, the present invention may be applied to a device having only a zoom mode.

Further, the present invention can be applied not only to a device that converts from a high-definition system to a current system, but also to a device that performs the reverse conversion.

Furthermore, the present invention can be applied not only to devices that convert between high-definition systems and current systems, but also to general devices that convert between television systems with different aspect ratios.

It goes without saying that the present invention can be modified in various other ways without departing from the spirit thereof.

[Effects of the Invention] As described above, according to the present invention, it is possible to easily check whether the screen extraction position is at a predetermined position.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, and FIG.
3 and 3 are diagrams for explaining the operation of FIG. 1, and FIG.
The figure is a circuit diagram showing the configuration of a conventional television system converter, and FIGS. 5 to 7 are diagrams for explaining the operation of FIG. 5. ] 1... Input terminal, 12... Field interpolation circuit, 13.15... Scanning line conversion circuit, 14... Left/right truncation/time axis conversion circuit, 16... Upper and lower panel addition circuit, 17... Selection circuit, 18... Controller, 19
...Conversion mode changeover switch, 2o...Output terminal, 21...Take-out position left/right movement switch, 31...Display device. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] The first television system is configured so that a part of the screen of the first television system becomes the entire screen of a second television system that has a different aspect ratio from that of the first television system. a system conversion means for extracting a part of a television system screen and converting the television signal of this part into a television signal for the second television system; and an extraction position for changing the screen extraction position in the system conversion means. 1. A television format conversion device comprising: changing means; and display means for displaying whether or not the screen take-out position changed by the take-out position change means is a predetermined position.