JPH0955896A - Picture mode switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve the troubles caused by unnecessary switching of the superimposed dialogue in-mode on the video picture by fixing the picture mode to the superimposed dialogue in-mode till interruption of video only at the time of setting the picture mode to the superimposed dialogue in-mode. SOLUTION: It is assumed that the picture mode without superimposed dialogue of video broadcasting or the like is set by a picture mode setting means 4 and the picture is outputted in the superimposed dialogue in-mode. This superimposed dialogue in-mode can be switched to another picture mode until a control signal for selection release of the automatic wide function, channel switching, or the like inputted by the operation of various keys is detected by an external control signal detection means 1 to set the superimposed dialogue in-mode again. When the external control signal is not detected, the superimposed dialogue in-mode is fixed. If interruption of video is detected by a video detection means 2, switching to another picture mode is possible until the superimposed dialogue in-mode is set again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen for controlling switching of screen modes according to the aspect ratio of a horizontal television receiver when receiving a television signal including image screens having different aspect ratios. The present invention relates to a mode switching device.

[0002]

2. Description of the Related Art In recent years, wide screen television receivers have become widespread. In this wide screen horizontal television receiver, when a so-called letterbox broadcast television signal having a 16: 9 image in the upper and lower portions of the screen is masked by black signals, the subtitle in mode or the subtitle in mode is operated by the user. Exclude the masked parts at the top and bottom of the screen outside the screen, such as in the wide zoom mode, and magnify 16:
Display the image part on the entire display screen of 9
It can be viewed as a 6: 9 image. Further, when the auto wide function is selected, the image portion can be displayed on the entire 16: 9 screen by enlarging it as described above without the user's operation. In the subtitle in mode described above, the subtitles in the lower black image of the received television image of the letterbox broadcast are left, the upper black image portion is eliminated, and the image of 16: 9 inside is enlarged. It is a mode to do. The wide zoom mode is a mode in which the upper and lower black image portions are excluded and the 16: 9 image inside is enlarged. Also, it is not a letterbox broadcast 4:
For example, there is a wide mode in which the right and left are enlarged to a 16: 9 screen when a normal 3 TV signal is used.

FIG. 3 is a flow chart showing the operation of a screen mode switching process of a conventional screen mode switching device for realizing such an auto wide function. According to this flowchart, it is first checked whether or not the television signal is a letter box broadcast (step S1). If it is not letterbox broadcasting, it is an ordinary TV signal of 4: 3 and is in wide mode (step S2). In case of letterbox broadcasting, it is checked whether or not there is subtitles (step S
3). If subtitles are included in the black signal below the television signal image, the subtitle in mode is set (step S4). If the state in which there is no subtitle in the television signal image continues for a predetermined time while the subtitle in mode is set (step S
5) After the lapse of the predetermined time, the screen mode is automatically switched from the subtitle in mode to the wide zoom mode (step S6). On the other hand, if there is no subtitle in step S3, the mode is shifted to the wide zoom mode.

[0004]

Since the conventional screen mode switching device is constructed in this way, when a scene without conversation occurs when the video in the subtitle in mode is being watched by selecting the auto wide function. When the video has no subtitles and this video continues for a certain period of time, the screen mode is switched to the wide zoom mode, the video in the wide zoom mode is projected on the entire display screen, and the subtitles appear on the projected video first. To subtitle in mode again
Since it is switched immediately, the viewer's viewer suddenly changes the screen image pattern, and in some cases the screen image pattern often changes, which reduces the interest in watching TV. .

The present invention has been made to solve the above problems, and an object of the present invention is to provide a screen mode switching device capable of preventing unnecessary switching of the video screen from the subtitle in mode.

[0006]

A screen mode switching device according to the present invention has at least a subtitle in mode and a wide zoom mode when there is no subtitle, and a landscape television reception having an auto wide function between the modes. In the screen mode switching device of the machine, a video detecting means for detecting whether or not a video is transmitted based on a television signal, and when the screen mode is set to the subtitle in mode, the video detecting means It is characterized by further comprising a screen mode control means that does not perform the auto-wide function until a detection result that the image is interrupted or that the image is not sent is obtained.

Further, in a screen mode switching device of a landscape television receiver having at least a subtitle in mode and a wide zoom mode when there is no subtitle and having an auto wide function between the modes, a predetermined external input is provided. External control signal detecting means for detecting the external control signal, and when the screen mode is set to the subtitle in mode, the auto wide function is activated until the external control signal detecting means detects the external control signal. It is characterized in that it is provided with a screen mode control means that does not perform.

[0008]

In the screen mode switching device according to the present invention, when the auto wide function is set and the subtitle in mode is selected, the currently transmitted image is interrupted or no image is transmitted. Up to this point, the selected subtitle in mode is maintained, and unnecessary switching of the video screen from the subtitle in mode is prevented to reduce the annoyance to the television viewer due to the switching of the screen mode. Also, when the auto wide function is set and the subtitle in mode is selected, an external input such as deselection of the auto wide function, channel switching, signal input switching, power on / off, etc. is input from the outside. The selected subtitle in mode is retained until a control signal is given, preventing unnecessary switching of the video screen from the subtitle in mode and reducing the annoyance to the TV viewer due to the screen mode switching. To do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the screen mode switching device of this embodiment. In the figure, reference numeral 1 denotes deselection of the auto wide function input by operating various external keys (not shown), channel switching, signal input switching,
An external control signal detecting means 2 for detecting a control signal for turning on / off the power source and the like, and 2 are image detecting means for judging and detecting whether or not an image is transmitted from the received television radio wave. The determination as to whether or not this image is being sent can be made based on whether or not a signal such as a horizontal synchronization signal indicating that the image is being sent is detected.

When the automatic wide function is set and the screen mode is the subtitle in mode 3, the external control signal detecting means 1 detects the control signal or the image detecting means 2 interrupts the image. The screen mode control means outputs a control signal that does not cause the screen mode switching setting from the subtitle in mode to another screen mode until it is detected that the video is not sent. Reference numeral 4 is a screen mode setting means for setting a screen mode based on the output of the screen mode control means 3.

FIG. 2 is a flowchart showing the operation of the screen mode switching device. First, the screen mode setting means 4 sets a screen mode without captions such as movie broadcasting to the caption in mode, and the screen mode setting means 4 selects the caption in mode. It is assumed that the image is output (step S11, step S12). In the set subtitle in mode, the control signals for deselecting the auto wide function, channel switching, signal input switching, power on / off, etc., input by operating various keys are external control signal detecting means. The screen mode can be switched until the subtitle in mode is detected again (step S).
13, step S15). When the external control signal is not detected, the subtitle in mode is fixed,
Next, the video detection means 2 checks whether the video is temporarily interrupted or is not sent, and if detected, it is possible to switch to another screen mode until the subtitle in mode is resumed. (Step S14, Step S
15). When it is detected in step S14 that the video is continuously sent without being interrupted by the video detection means 2, switching to another screen mode cannot be executed, and the set subtitle in mode is set. Keeps fixed.

As described above, in the screen mode switching device of the present embodiment, when the subtitle in mode is set, the image is temporarily interrupted, the image is not sent, or the various keys are operated to make the automatic wide. The subtitle in mode can be switched to another screen mode only when a control signal for deselecting a function, switching a channel, switching a signal input, turning on / off a power source, or the like is input. As a result, switching from the subtitle in mode to another screen mode is suppressed, and the annoyance to the television viewer due to the frequent change of the screen mode of the video screen during television viewing is eliminated.

[0013]

According to the present invention, only when the screen mode is set to the subtitle in mode, the screen mode is captioned until the image is temporarily interrupted or no video is sent. Since it is fixed to the in mode, the subtitle in mode is not frequently switched to another screen mode, and an annoyance due to unnecessary switching of the video screen from the subtitle in mode can be eliminated. Also, only when the screen mode is set to the subtitle in mode, a predetermined external control signal such as deselection of the auto wide function, channel switching, signal input switching, power on / off, etc. is transmitted from the outside. Until the input, the subtitle in mode is not switched to another screen mode, and there is an effect that the troublesomeness caused by unnecessary switching of the video screen from the subtitle in mode is eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram showing a screen mode switching device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the screen mode switching device according to the embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of a conventional screen mode switching device.

[Explanation of symbols]

 1 External Control Signal Detection Means 2 Video Detection Means 3 Screen Mode Control Means 4 Screen Mode Setting Means

Claims (2)

[Claims] 1. A screen mode switching device for a horizontal television receiver having at least a subtitle in mode and a wide zoom mode when there is no subtitle, and an auto wide function between the modes, in a screen mode switching device, an image based on a television signal is displayed. And a video detecting means for detecting whether or not the video is transmitted, and when the screen mode is set to the subtitle in mode, the video detecting means detects interruption of the video or that the video is not transmitted. A screen mode switching device comprising: a screen mode control unit that does not perform the auto wide function until a result is obtained. 2. A screen mode switching device for a horizontal television receiver having at least a subtitle in mode and a wide zoom mode when there is no subtitle, and a predetermined mode input from outside in a horizontal television receiver screen mode switching device having an auto wide function between the modes. External control signal detecting means for detecting the external control signal, and when the screen mode is set to the subtitle in mode, the auto wide function is activated until the external control signal detecting means detects the external control signal. A screen mode switching device comprising a screen mode control means that does not perform the operation.