JP2001197388A - Video signal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce adverse influence given to a viewer that animation broadcast gives without damaging the vividness of the screen of a regular program. SOLUTION: This device is provided with a solid painting judgment part 5 changing the rate of the change of the picture (picture displayed on CRT 4) corresponding to a video signal with respect the change of the video signal, judging whether a solid painting part exists in the picture shown by the video signal or not based on the video signal when a mode where the rate of the change of the picture is reduced to be an animation mode and a mode where the rate is not reduced is set to be a normal mode, and transmitting a solid signal when the solid part is judged to be existing and a display control part 7 changing the normal mode to the animation mode when the solid signal is transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal apparatus for reducing an adverse effect of an animated screen on a viewer's physical condition by displaying a screen with suppressed stimulation when the video signal is a signal indicating an animated screen. It is about.

[0002]

2. Description of the Related Art In an animation screen in a television broadcast, in order to enhance the effect of developing a story, sometimes the color tone and the luminance change greatly as if blinking. On the other hand, in recent years, it has been reported that the above-mentioned large changes in the hue and luminance may have a bad influence on the physical condition of the viewer. It is also reported that the degree of this effect increases as the room becomes darker and the contrast of the screen increases. For this reason, when performing an animation broadcast, precautions to the viewer, such as "Please brighten the room," are displayed by telops (referred to as a first conventional technique).

Further, as a conventional technique for changing the state of a screen displayed on a CRT, there is a technique proposed as Japanese Utility Model Laid-Open No. 5-2483. In other words, this technology includes a memory unit that stores a video state such as a luminance level that has been input and set, and a time zone, and a timer unit that measures time. Also, when the measured time reaches the designated time, a control microcomputer that controls the luminance signal processing circuit and the like to control the luminance level of the screen to the input set level is provided. ing. Therefore, during the day,
As described above, when the surroundings become brighter, the brightness of the screen is automatically increased, so that a comfortable trial listening can be performed (referred to as a second related art).

[0004]

However, when the first prior art is used, the following problems have occurred. In other words, even when a note to the viewer is displayed by the telop, the displayed note is rarely executed when only the child who is listening to the animation broadcast is a child. For this reason, even in the case of an animation broadcast, the room may be left in a dark state, and in this case, the animation screen may adversely affect the physical condition of the child.

[0005] Further, the second prior art has a configuration in which a luminance level is controlled in accordance with a video state and a time zone set as input. For this reason, when listening to a normal program, if the brightness level is set to be optimal,
When it comes to anime broadcasting, it is impossible to prevent the animation screen from adversely affecting the physical condition of the child.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The object of the present invention is to provide a screen display with reduced stimulus when it is determined that the screen has become an animation broadcast screen, thereby providing a screen for a normal program. It is an object of the present invention to provide a video signal device capable of reducing an adverse effect of animation broadcasting on a viewer without deteriorating the vividness of the video.

Another object of the present invention is to provide a video signal device capable of efficiently suppressing a stimulus given to a viewer by an animation screen.

Another object of the present invention is to provide a video signal device capable of preventing an erroneous transition to an animation mode when the screen is not an animation screen.

Another object of the present invention is to provide a video signal device capable of promptly returning to a vivid image display state when an animation broadcast ends.

[0010]

In order to solve the above-mentioned problems, a video signal device according to the present invention is applied to a video signal device capable of changing a ratio of a change of a screen corresponding to a video signal to a change of a video signal. When the mode in which the ratio of the change in the screen is reduced is set to the animation mode and the mode in which the ratio is not reduced is set to the normal mode, based on the video signal, whether or not the screen indicated by the video signal has a solid portion. And a solid determination unit that sends a solid signal when it is determined that a solid portion exists, and a display control unit that changes the normal mode to the animation mode when a solid signal is sent.

That is, since the animation screen is a screen having a solid-painted portion, when an animation broadcast is made, the solid determination section sends a solid signal. For this reason, when an animation screen is displayed, the mode becomes the animation mode. Then, in the animation mode, the ratio of the change of the screen to the change of the video signal becomes small. Therefore, even when the luminance and the hue of the video signal greatly change, the rate of change of the luminance and the hue of the screen decreases. That is, even when the change in the luminance or the hue in the video signal becomes large, the change in the luminance or the hue on the screen is suppressed.

Further, in addition to the above configuration, the configuration is such that the contrast in the animation mode is lower than that in the normal mode.

That is, in the case where the contrast is reduced, even when the luminance and the hue of the video signal greatly change, the change of the luminance and the hue of the displayed screen becomes a small change.

[0014] In addition to the above configuration, the display control section is configured to change the normal mode to the animation mode when the continuous signal transmission period exceeds a preset first period.

That is, like a commercial screen,
Even when the screen is not an animation screen but has a solid portion, if the duration does not exceed the first period, the mode is not changed to the animation mode.

In addition to the above configuration, when a predetermined period, which is shorter than the first period, is defined as a second period, the display control unit determines a period during which the transmission of the solid signal is stopped. Is changed beyond the second period, the animation mode is changed to the normal mode.

That is, when the animation screen ends, the mode is changed to the normal mode when a second period set to a period shorter than the first period elapses.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described with reference to the drawings. FIG. 1 is a block diagram showing an electric configuration of a television provided with an embodiment of a video signal device according to the present invention.

In FIG. 1, a tuner / IF unit 2 is a block that receives a channel specified by a user and amplifies an intermediate frequency signal obtained by performing a predetermined process on the received signal. Then, the amplified intermediate frequency signal is sent to the video signal processing unit 3.

The video signal processing unit 3 includes a tuner / IF unit 2
Is a block for generating a drive signal for driving the CRT 4 from the intermediate frequency signal transmitted from the. That is, a video signal extracted by performing video detection on the intermediate frequency signal is separated into a luminance signal and a chrominance signal. Then, these two types of signals are sent to the video signal device 1, and a drive signal for driving the CRT 4 is generated from the luminance signal and the color signal whose level is set by the video signal device 1.

When the video signal transmitted from the video signal processing unit 3 is a signal indicating an animation screen, the video signal device 1 changes the screen displayed on the CRT 4 to a screen with reduced contrast or the like. It is a block.
For this purpose, a solid determination unit 5, a level change unit 6, and a display control unit 7 are provided.

Based on the video signals (luminance signal and chrominance signal) sent from the video signal processing section 3, the solid determination section 5 determines whether or not a screen indicated by the video signal has a solid portion. It is a block. When it is determined that there is a solid portion, a solid signal is sent to the display control unit 7.

That is, the solid determination section 5 determines whether the period in which the level of the luminance signal and the level of the chrominance signal are constant for each horizontal scanning line lasts longer than 期間 of one horizontal scanning period Find out if. Then, when the number of scanning lines satisfying the above conditions (the scanning period in which the level is constant is longer than ４ of one horizontal scanning period) is continuously 10 or more, there is a solid-painted portion. Is determined. In addition, about the above-mentioned period, as other arbitrary periods,
For example, the period can be set to １ ／, １ ／, １ ／ of one horizontal scanning period, or a period equal to one horizontal scanning period. The number may be any other number, for example, five or fifteen.

The level changing section 6 is a block for changing the contrast, brightness and color density of the screen displayed on the CRT 4 corresponding to each of the normal mode and the animation mode.

That is, when the output of the display control unit 7 indicates the normal mode, the luminance signal and the color signal transmitted from the video signal processing unit 3 are changed so that the screen of the CRT 4 becomes a screen having normal vividness. The level with the signal is set, and the set signal is sent back to the video signal processing unit 3. When the output of the display control unit 7 indicates the animation mode, the levels of the luminance signal and the color signal transmitted from the video signal processing unit 3 are adjusted so that the screen display of the CRT 4 becomes a screen display in which the stimulus is suppressed. The set and level-set signal is sent back to the video signal processing unit 3.

More specifically, the level change section 6 reduces the contrast of the screen of the CRT 4 in the animation mode in order to efficiently suppress the stimulus given to the viewer when compared to the normal mode. So that the levels of the luminance signal and the chrominance signal are set. At the same time, the levels of the luminance signal and the color signal are set so that the brightness and the color density are slightly reduced.

The display control section 7 is a block for changing the normal mode to the animation mode when the period during which the solid determination section 5 sends the solid signal continues beyond the first period set in advance. . When the period during which the solid determination unit 5 stops sending a solid signal continues beyond the second period set in advance, the animation mode is changed to the normal mode. Note that the second period is set to be shorter than the first period.

During the first period, when the animation screen is displayed,
It means the delay time before shifting to the animation mode. Therefore, it is desirable to shorten it. However, when the screen is changed to a commercial screen, the screen may have a solid-painted portion. In this case, the commercial screen may cause a transition to the animation mode. But,
A commercial screen having a solid-painted portion rarely lasts for more than one minute, and ends within one minute with a very high probability.

From the above, in the present embodiment, by setting the first period to one minute, when the animation screen is displayed, the delay in shifting to the animation mode is shortened, and the commercial screen is used to switch to the animation mode. The transition is prevented.

The second period means a delay time before the transition to the normal mode when the animation screen ends. Therefore, it is desirable to shorten it. However, the animation screen may be a screen having no solid portion, and in this case, there is a possibility that the screen is erroneously shifted to the normal mode.

As described above, in the present embodiment, by setting the second period to 20 seconds, when the animation screen is completed, the delay in shifting to the normal mode is shortened, and the animation screen is displayed in a solid-filled portion. Even when there is no screen, it is prevented that the mode is erroneously shifted to the normal mode.

FIG. 2 is a flowchart showing the main operation of the embodiment. The operation of the embodiment will be described with reference to FIG.

When the power is turned on, the display control unit 7 sets the output to the level change unit 6 to a level indicating the normal mode (step S1). Therefore, in this state, the program is displayed as a screen with normal vividness.
Displayed on CRT4. On the other hand, the solid determination unit 5 checks whether or not there is a solid portion on the screen. In the case of a normal program, since there is no solid portion, the solid determination unit 5 does not send a solid signal. For this reason, the display control unit 7 keeps giving the level indicating the normal mode to the level changing unit 6.
Therefore, the operation is a loop operation of step S2.

In the above state, it is assumed that a commercial screen is displayed and the screen has a solid portion. At this time,
The solid determination unit 5 sends a solid signal. However, a commercial screen having a solid portion finishes in almost all cases within 15 seconds. Also, even if it is long, before reaching 1 minute, the screen changes to a screen without a solid portion. Therefore, also in this case, the operation is a loop operation of step S2.

When the animation broadcast starts and the screen indicated by the video signal becomes an animation screen, the solid determination section 5 keeps sending the solid signal to the display control section 7 because the screen has a solid-painted portion. . For this reason, the display control unit 7
If the solid determination unit 5 sends a solid signal for more than one minute, it is determined that the screen is an animation screen, and the level change unit 6
Is changed to a level indicating the animation mode (step S3).

In the following, since the solid portion on the animation screen is divided into small portions, even when the solid determination portion 5 stops sending a solid signal, this period is shorter than 20 seconds. On the other hand, when the period during which the transmission of the solid signal is stopped is within 20 seconds, the display control unit 7 maintains the animation mode. Therefore, during the animation broadcast time, the loop operation of steps S3 and S4 or the loop operation of steps S3 to S5 is performed.

When the animation mode is set, C
The screen displayed on RT4 is a screen in which the contrast is reduced and the brightness and the color density are slightly reduced. For this reason, even when the animation screen becomes a screen in which the color and brightness change drastically so as to blink, the CRT 4
, The above-mentioned change remains as a suppressed change. That is, the screen does not adversely affect the physical condition of the viewer.

When a commercial is inserted during the animation broadcast and a commercial screen is displayed, a screen without a solid portion continues for more than 20 seconds. For this reason, when a commercial is inserted, if 20 seconds have elapsed since the commercial was inserted, the display controller 7
Changes the animation mode to the normal mode (step S6). Therefore, the screen displayed on the CRT 4 changes to a screen having normal vividness.

Next, the display control section 7 determines whether or not the normal mode state continues for more than 5 minutes (step S7). On the other hand, the commercial screen ends within 3 minutes at the longest. Therefore, steps S4 to S4
When the animation broadcast is resumed again while the loop operation of S7 is being performed, the screen becomes a screen with a solid painting portion. Therefore, the solid determination unit 5 starts transmitting a solid signal. As a result, when the commercial screen ends and 5 seconds have elapsed, the loop operation starts at step S4 and ends at step S3.
Get out. For this reason, the display control unit 7 sets the mode to
Change from normal mode to anime mode. As a result, the screen of the CRT 4 becomes the screen of the animation mode. After that, the loop operation of steps S3 and S4 is performed again,
Alternatively, a loop operation of steps S3 to S5 is started.

When the animation broadcast ends,
A commercial screen without a solid-painted portion or a commercial screen with a solid-painted portion that rarely lasts longer than 15 seconds starts. For this reason, when 20 seconds have elapsed since the start of the commercial screen, the operation starts from the loop operation of steps S3 to S5, and returns to step S3.
6, the mode is changed from the animation mode to the normal mode. In the following, steps S4 to S
7 is started.

The above-described loop operation of steps S4 to S7 is an operation after the end of the animation broadcast. Therefore, after that, the situation where the transmission period of the solid signal continues for more than 20 seconds does not occur. Therefore, steps S4 to S7
After 5 minutes have passed since the start of the loop operation,
The operation shifts to the loop operation of step S2 (the same operation as when the power is turned on).

Note that the five-second period used for the determination in step S4 is a delay time until a transition to the animation mode is made when the CM inserted during the animation broadcast ends and the animation screen is restarted. On the other hand, this period is also a period for preventing the transition to the animation mode due to the solid painted portion when the solid painted portion appears on the commercial screen. Therefore, it is desirable to shorten this period, but if it is too short, the probability of erroneously shifting to the animation mode due to the commercial screen increases. Therefore, in this embodiment, the period is set to 5 seconds. However, this period can be set to an arbitrary period (for example, 3 seconds, 10 seconds, or 15 seconds) in consideration of the above conditions. I have.

Although the present invention is not limited to the above embodiment and has been described for a case where the present invention is applied to a television, the present invention can be similarly applied to other devices such as a receiving device of a video cassette deck. It has become.

[0044]

As described above, the video signal device according to the present invention is applied to a video signal device capable of changing the ratio of the change of the screen corresponding to the video signal to the change of the video signal, and When the mode for reducing the change ratio is the animation mode, and the mode for not reducing the ratio is the normal mode, based on the video signal, it is determined whether or not the screen indicated by the video signal has a solid portion, A solid determination unit for transmitting a solid signal when it is determined that there is a solid portion, and a display control unit for changing the normal mode to the animation mode when a solid signal is transmitted. Therefore, when the screen becomes an animation screen, the ratio of the change of the screen to the change of the video signal becomes small. In other words, even when the change in brightness or color tone in the video signal is large, the change in brightness or color tone on the screen is suppressed, so that the animation broadcast has no adverse effect on the viewer without impairing the vividness of the screen of a normal program. Can be reduced.

Further, when the animation mode is set, the contrast is set lower than that in the normal mode. In other words, when the contrast is reduced, even when the brightness and the hue of the video signal greatly change, the change in the brightness and the hue of the displayed screen is a small change, so that the animation screen gives the viewer a stimulus. Can be suppressed efficiently.

Further, the display controller changes the normal mode to the animation mode when the continuous signal transmission period exceeds a first period set in advance. Therefore, even when the screen is not an animation screen, such as a commercial screen, but has a solid-painted portion, if the duration does not exceed the first period, the mode is not changed to the animation mode.
Therefore, when the screen is not the animation screen, it is possible to prevent the animation mode from being erroneously set.

Further, when a predetermined period, which is shorter than the first period, is defined as a second period,
The display control unit is configured to change the animation mode to the normal mode when a period during which the transmission of the solid signal is stopped continues beyond a second period. Accordingly, when the animation screen ends, the mode is changed to the normal mode when the second period set to a period shorter than the first period elapses, so that when the animation broadcast ends, a vivid image is displayed. It is possible to quickly return to the display state.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric configuration of a television to which an embodiment of a video signal device according to the present invention is applied.

FIG. 2 is a flowchart showing a main operation of the embodiment.

[Explanation of symbols]

 Reference Signs List 1 video signal device 5 solid determination unit 7 display control unit

Claims (4)

[Claims] 1. A video signal device capable of changing a ratio of a change of a screen corresponding to a video signal to a change of a video signal, wherein a mode for reducing the ratio of the change of the screen is an animation mode, and the ratio is not reduced. When the mode is set to the normal mode, based on the video signal, it is determined whether or not the screen indicated by the video signal has a solid portion, and when it is determined that there is a solid portion, a solid determination unit that transmits a solid signal. And a display control unit for changing a normal mode to an animation mode when a solid signal is transmitted. 2. The video signal device according to claim 1, wherein the contrast in the animation mode is lower than the contrast in the normal mode. 3. The display control unit according to claim 1, wherein a duration of the transmission of the solid signal is a first duration set in advance.
3. The normal mode is changed to the animation mode when the period of time is exceeded.
The video signal device according to claim 1. 4. When the second period is a period set in advance and is shorter than the first period, the display control unit determines that the period during which the transmission of the solid signal is stopped is a second period. 4. The video signal device according to claim 3, wherein the animation mode is changed to the normal mode when the operation continues beyond the limit.