JPH1098657A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver with a picture-in-picture(PIP) function in which a display on a slave pattern is stopped when a video image on the slave pattern is a video image that should not be displayed. SOLUTION: A video signal received from an input terminal 12 is given to a slave pattern video signal processing circuit 8, in which a slave pattern video signal is produced and displayed on a CRT 11. A code detection circuit 9 detects a specific code (a code to inhibit image display such as a program which is prohibited to the children aged under 13) from a caption signal included in a video signal received from the input terminal 12, and a microcomputer 5 controls the slave pattern video signal processing circuit 8 and a mixture circuit 4 to inhibit the display of the video image of the slave pattern.

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 picture-in-picture (PIP) function and receiving a closed caption broadcast. It is about.

[0002]

2. Description of the Related Art In the United States, all television receivers have been closed captioned since July 1993.
It was legislated to include a decoder. The closed caption is a broadcast system in which a caption signal (character information) is multiplexed on a video signal and characters synchronized with audio are displayed on a television screen. Thereby, people with hearing impairment can understand and enjoy television broadcasting in the same way as healthy people.

In order to receive such a caption signal, a caption decoder is required, and this decoder must be built in a television receiver.
A television receiver incorporating this caption decoder is described in, for example, Nikkei Electronics 1991.
The no. 537, pages 149 to 158
Page.

[0004] By the way, usually only one image is seen on the screen of a television receiver. In order to solve this problem, there has been proposed a television receiver having a so-called PIP (Picture-in-Picture) function for displaying another television screen as a child screen in a television screen ( Japanese Patent Publication 56-282
No. 1). Even in the case of such a television receiver with a PIP function, it is necessary to incorporate a decoder capable of receiving the above-described caption signal.

[0005] Such a television receiver with a PIP function has only a decoder for receiving a caption signal included in a television signal serving as a main screen among input television signals. Thereby, the caption signal of the main screen can be displayed on the screen.

However, when a small screen is displayed, a caption signal is also inserted into the television signal of the small screen, so that the character information of the caption signal of the small screen can be viewed. Requires a caption decoder to decode the caption signal of the television signal. For this reason, a caption decoder for the main screen and a caption decoder for the sub-screen must be provided in the television receiver.

Further, even if a caption decoder is provided for a small screen and character information is displayed on the small screen when the small screen is displayed, the character is displayed on a small screen. There is no point in displaying. Therefore, a caption decoder is not usually provided for the child screen.

[0008] However, television broadcasts and the like that are being broadcast include broadcasts for adults and broadcasts with violent scenes. In the United States and other countries, such broadcasts that cannot be shown to children can be distinguished. Like rati
There is something called ng.

[0009] The rating is classified according to the contents described above for each broadcast, and the information is sent together with the caption signal. Therefore, based on this information, it is possible to distinguish broadcasts in which children and the like cannot see.

[0010] As described above, when there is a program that the child does not want to show by broadcasting, when the above-described television receiver with a PIP function has only a caption decoder for the parent screen, the television of the parent screen is used. In the case of the television signal, the rating information is known, but the rating information of the television signal of the small screen is not known.

Therefore, when the mode for displaying the sub-screen is set, there is a problem that whatever broadcast is displayed on the sub-screen.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in consideration of the above-described problems.
It is an object of the present invention to provide a television receiver with a PIP function capable of stopping the display of a sub-screen when the image should not be displayed.

[0013]

SUMMARY OF THE INVENTION The present invention provides a closed
First video signal reproducing means for receiving a first television signal including a caption signal and reproducing a video signal;
A character signal reproducing unit that extracts a closed caption signal included in the first television signal and reproduces a character signal that is character information corresponding to the closed caption signal, and is different from the first television signal. A second video signal reproducing means for receiving a second television signal including a closed caption signal and reproducing a reduced video signal; and identifying the second video signal from the closed caption signal included in the second television signal. Specific code information extracting means for extracting the code information of
The character signal reproduced by the character signal reproducing means is superimposed and displayed on the video signal reproduced by the first video signal reproducing means, and the video signal reproduced by the second video signal reproducing means is displayed on the screen. Display means for partially displaying,
Control means for receiving the specific code information extracted by the specific code information extracting means, and controlling to stop outputting the video signal from the second video signal reproducing means when the specific code information is present. A television receiver characterized in that:

Further, according to the present invention, the control means receives the specific code information extracted by the specific code information extracting means, and when there is the specific code information, the video signal from the second video signal reproducing means. Is a television receiver which stops outputting and generates a character signal notifying that the display has been stopped, and displays the character signal on the display means.

Further, the present invention is the television receiver, wherein the specific code information is screen display prohibition information in a closed caption signal.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a television receiver according to the present invention, and FIG. 2 is a flowchart showing the operation thereof. First, in FIG. 1, 1 is a tuner,
2 is a VIF (video intermediate frequency) circuit, 3 is a video detection circuit,
4 is a mixing circuit, 5 is a microcomputer for selecting a channel (microcomputer), 6 is an OSD (on-screen display).
Circuit, 7 is a caption decoder circuit, 8 is a video signal processing circuit for a small screen, 9 is a code detection circuit for detecting a specific code of a caption signal, and 10 is operation of a remote control (remote control) or an entire panel of a television receiver. Reference numeral 11 denotes a CRT (cathode ray tube), and 12 denotes a video signal input terminal.

Next, the operation will be described. When a user using the television receiver selects a desired channel on the operation unit 10, the selected tuning voltage is supplied from the microcomputer 5 to the tuner 1. Then, a television signal of the selected channel is supplied from the tuner 1 and input to the video detection circuit 3 via the VIF circuit 2. The video signal is output from the video detection circuit 3 and output to the mixing circuit 4.

On the other hand, in order to decode the caption signal included in the television signal, the video signal from the video detection circuit 7 is input to the caption decoder 7, and the caption decoder 7 outputs the video signal to the 21st scanning line of the video signal. Extract certain caption information. The extracted caption information is supplied to the microcomputer 5. The microcomputer 5 controls the OSD circuit 6 to generate a character signal so as to generate a character signal based on the caption information. The character signal from the OSD circuit 6 is supplied to the mixing circuit 4, where the video signal of the video detection circuit 3 and the character signal of the caption signal are mixed and displayed on the CRT 11.

The OSD circuit 6 is used not only for displaying the character signal of the caption information described above, but also for displaying characters and characters on the CRT 11 when performing various adjustments such as contrast, brightness, and volume.

The mixing circuit 4 may be a simple mixing circuit or a switch. Further, the mixing circuit 4 is selectively switched between a video signal and a character signal by the microcomputer 5.

Further, an external video signal (for example, a video signal from a VTR or LD or a tuner other than the above-described tuner) is input to the input terminal 12 and supplied to the small-screen video signal processing circuit 8. . In the small-screen video signal processing circuit 8, in order to reduce the input video signal, a small-screen video signal is generated which displays the pixels in the horizontal direction and the number of scanning lines in the vertical direction on a part of the CRT 11 in thinning. This small-screen video signal is supplied to the mixing circuit 4 and displayed on the CRT 11.

This small-screen video signal is transmitted from the operating unit 1 by the user.
When the PIP mode for displaying a small screen is set to 0, the microcomputer 5 controls the small screen video processing circuit 8 to output a small screen video signal, and controls the mixing circuit 4 to display the small screen video signal on the screen. Is displayed at a predetermined position. PIP
When the mode is not the mode, the microcomputer 5 stops the output of the small-screen video signal, and controls the mixing circuit 4 so that the small-screen video signal is not selected, or stops the output of the small-screen video signal and performs the blue-back operation. , And the sub-screen video signal of the blue screen can be displayed at a predetermined position on the screen by the mixing circuit 4.

The code detecting circuit 9 detects, for example, a code of a program which is prohibited under the age of 13 from among the codes of the program grade included in the caption signal of the small-screen video signal. The code detection circuit 9 determines whether or not to display a screen, and supplies the information to the microcomputer 5.

Next, the operation of the microcomputer 5 in the PIP mode of the present invention will be described with reference to the flowchart of FIG. First, when the user selects the PIP mode (S1), the small-screen video signal processing circuit 8 outputs a small-screen video signal. That is, in the normal PIP mode screen, as shown in FIG. 3A, the caption character signal 31 is mixed on the main screen 30, and the child screen 32 is further mixed and displayed. In the area where the character signal of the caption and the child screen overlap, the child screen is preferentially displayed, so that the character signal may be missing.

At this time, a special code (1) indicating that the screen should not be displayed is selected from the caption signals included in the video signal input to the sub-screen video signal processing circuit 8.
Only the code of the program which is under 3 years old is detected by the code detection circuit 9 (S2).

When a code is detected by the code detection circuit 9, the small-screen video signal processing circuit 8 is controlled so that the display of the small-screen video signal is stopped (S3). As shown in FIG. 3B, the screen display at this time does not display the video signal of the child screen 30 displayed on a part of the parent screen 30 but outputs a blue-back image. Is displayed with priority given to the caption character.
This can be realized by controlling the mixing circuit 4.

Further, in order to inform the user of the status of the operation, the OSD circuit 6 displays the message 33 "Sub-screen has been blocked" (S4). Then, when the user releases the mode in which the display of the child screen is stopped using the operation unit 10 (S5), the display returns to the normal PIP screen as shown in FIG.

By leaving the picture of the child screen in the blue background in this way, the position at which the child screen is displayed can be recognized. Also,
It is also possible to recognize the state in which the child screen is stopped by the message.

Instead of such a display method, the child screen may be completely erased as shown in FIG. 3C, and only the main screen and the character signal may be displayed. The operator may be allowed to set a plurality of special codes arbitrarily.

[0030]

The present invention has been made in view of the above points, and when a television receiver with a PIP function is displaying an image on a small screen, an image signal that must not be displayed is displayed. When the input is made, the display of the image of the child screen is stopped and the display of the main screen and the character signal of the caption and the caption can be automatically performed, so that the user can display the child screen while watching the image one by one. There is no need to stop scanning.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 3 is a diagram showing a display screen of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tuner 2 VIF circuit 3 Video detection circuit 4 Mixing circuit 5 Microcomputer 6 OSD circuit 7 Caption decoder 8 Small screen video processing circuit 9 Code detection circuit 10 Operation unit 11 CRT 12 Input terminal

Claims (3)

[Claims] 1. A first video signal reproducing means for receiving a first television signal including a closed caption signal and reproducing a video signal, and a closed caption signal included in the first television signal Character signal reproducing means for reproducing a character signal which is character information corresponding to the closed caption signal, and a second television signal including a closed caption signal different from the first television signal. A second video signal reproducing unit that receives and reproduces a reduced video signal; a specific code information extracting unit that extracts specific code information from a closed caption signal included in the second television signal; The character reproduced by the character signal reproducing means is added to the video signal reproduced by the video signal reproducing means. Display means for superimposing and displaying a signal, and displaying the video signal reproduced by the second video signal reproducing means on a part of the screen, and the specific code information extracted by the specific code information extracting means. And a control means for controlling to stop outputting the video signal from the second video signal reproducing means when the specific code information is present. 2. The television receiver according to claim 1, wherein said control means receives said specific code information extracted by said specific code information extracting means, and said second code is received when said specific code information is present. A television receiver, wherein output of a video signal from a video signal reproducing means is stopped, and a character signal notifying that the display has been stopped is generated and controlled to be displayed on the display means. 3. The television receiver according to claim 2, wherein the specific code information is screen display inhibition information in a closed caption signal.