JPH0998392A - Television receiver for teletext broadcasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm display patterns of plural programs in the case of 2-screen display in an understandable way by shifting a selected video image later from a 2nd screen to a 1st screen and displaying a new video image on the 2nd screen. SOLUTION: A text signal decode circuit 8 decodes data of a teletext broadcasting program from a composite video signal and controls index information in cooperation with an index memory 9 and a write/call control section 10. Furthermore, video images of plural kinds of programs are separated and compressed and recorded in image recording sections 13, 15, 17, 20. A screen switching control section 30 doubles a horizontal synchronizing signal and divides the display screen into two and two video signals selected among video signals A, B1 , B2 , C are displayed on the 1st and 2nd screens. Every time switching is made, a switching control section 4 provides an output of a switching signal to control switches S1 -S18 , which shift the video image having been displayed on the 2nd screen to the 1st screen, on which the video image is displayed and which displays a new video image on the 2nd screen. Thus, the switching state of video images is easily recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver capable of receiving a character multiplex broadcast, and more particularly to a technique of repetitive display of a plurality of programs when two screens are displayed.

[0002]

2. Description of the Related Art A character multiplex broadcasting program that can be received by a character multiplex television receiver receives from 14H to 14H within a vertical blanking period of a video signal of a television program transmitted together with the character multiplex broadcasting. It is superimposed on the horizontal lines of 16H and 21H. There are three types of programs for this character multiplex broadcasting: independent programs, complementary programs, and subtitle programs. The present invention particularly relates to an independent program and a mode of repeating display of a table of contents screen for the independent program.

An independent program is a program that can broadcast its own program regardless of the contents of the television program being broadcast, and can organize various programs. For example, various news and weather. There are general information, stock information, and night progress. The complementary program is a text broadcast program for complementing the contents of the TV program being broadcast, and the program to be complemented is directly connected to a specific TV program and can send more detailed information. For example, there are answers to quiz programs, supplementary contents of sports relay programs, material lists of cooking programs, and the like. A subtitle program is a program that is broadcast in the form of subtitles to a television program being broadcast in synchronization with the progress of the television program being broadcast and corresponding to the content of the television program.

When the table of contents key of the remote control device is operated while a general television program is displayed on the screen (full screen), a table of contents image 110 is displayed on the full screen 100 as shown in FIG. 8 (a). . As this table of contents image 110,
For example, "1 # Minna no Hiroba", "2 # Osaka Weather", "3 # World Square", etc. are displayed. It is displayed as a combination of a numerical value and the program number and program name indicated by #. In the display state of the table-of-contents image 110, when the program number is selected by operating the numeric keys and the # key from the remote control device, for example, when the key “2 #” is input, the table-of-contents image is displayed as shown in FIG. 8B. Instead of 110, a program content image 120 of “Weather in Osaka” is displayed on the full screen 100 as a teletext program. In addition, "2 #
It is also displayed.

The above is the case of the one-screen display mode, but in the case of the two-screen display mode, it is as follows. When the table of contents key of the remote control device is operated in the state where a general TV program is displayed on the full screen, as shown in FIG. 9A, for example, the table of contents video 21 is displayed on the first sub screen 201.
0 is displayed, and the television image 220 is displayed on the second child screen 202.
(In this case, a news program) is displayed. In this state, when the program number is selected by operating the numerical keys and the # key from the remote control device, for example, when the key “2 #” is input, as shown in FIG. 9B, the first sub-screen 201 is displayed. Instead of the table-of-contents image 210, a program content image 230 of “weather in Osaka” is displayed as a teletext program. On the second child screen 202, the television image 220 continues.
Is projected.

Incidentally, "2 # Osaka Tentenki" is also displayed.

[0007]

In the conventional case, as described above, when the program number is selected by key input and the program content images 120 and 230 of the teletext program are displayed, the original table of contents image is displayed. 110 and 210 are supposed to disappear. Therefore, if you want to see the contents of other teletext programs, be sure to press the Table of Contents key again,
I had to bring up the table of contents video on the screen. However, when the table of contents video is called, the teletext program that was being projected one time before disappears. That is, every time a repetitive operation is performed, the previous screen disappears, and the previous screen cannot be confirmed while the new screen is being displayed, resulting in a problem of poor usability. there were.

The present invention was devised in view of such circumstances, and it is possible to rationally perform repeated display of a plurality of programs (screens) when the two screens are displayed to confirm the projected screen. The purpose is to provide it in a more understandable state.

[0009]

According to a first aspect of the present invention, there is provided a character multiplex television receiver for receiving a character multiplex signal decoding circuit for decoding data of a character broadcast program from a composite video signal, and the character multiplex signal. The decoding circuit includes means for separating the video of a plurality of types of programs including the table of contents information from the character-multiplexed signal and means for compressing the separated video, and the screen of the display unit is divided into two parts. No screen or second screen, two of the plurality of types of video are selected for the first screen and the second screen, and the first selected video is displayed on the first screen. In addition, the image selected later is displayed on the second screen, and every time an operation is performed, the image displayed on the second screen is repeated and a new image is simultaneously displayed on the first screen. It is displayed on the second screen and the same operation is repeated. It is characterized by comprising a screen switching control unit to return.

A teletext receiver according to a second aspect of the present invention is the television receiver for teletext according to the first aspect, wherein the screen switching control section displays the first teletext image on the first screen by a certain operation. At the same time, the table-of-contents image is displayed on the second screen, the first teletext image is erased by the operation of selecting the table-of-contents item, and the table-of-contents image is repeated from the second screen and displayed on the first screen. The second teletext video second
The screen is displayed on the screen, and the contents are erased by the operation of selecting the next contents item, and the second teletext image is repeated from the second screen to appear on the first screen, and at the same time a new teletext image is displayed. It is characterized in that it is configured to be displayed on the second screen.

Note that it is preferable that the screen of the display section is divided into two parts to the left and right in view of the aspect ratio.

The image selected later is switched from the second screen to the first screen, and a new image is displayed on the second screen. Although the projection position changes due to the switching, the previous video remains, and the previous video that remains is always on the first screen and new video is always on the second screen. It becomes easier to recognize the state.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a character multiplex television receiver according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an electrical configuration of a character multiplex television receiver according to the embodiment.
In FIG. 1, reference numeral 2 is a remote control receiver that receives infrared signals and data from the infrared remote controller 1 and controls each unit, 3 is an operation panel provided on the main body of the receiver, and 4 is a remote control receiver 2 or operation panel 3. On the basis of the control signal from the switches 12, 14, 16, 19 and the switches 33, 34, 36, 3 in the screen switching control unit 30.
A switching control unit for sending ON / OFF or switching signals to the switches 8, 40 and the switching switches 37, 39, 41. 5
Is a television receiving circuit that generates a composite video signal (composite signal) from broadcast radio waves received by the antenna, 6 is a video / chroma signal processing circuit that extracts and processes a video / chroma signal from the composite video signal, and 7 is a composite video signal A sync separation circuit that separates the vertical and horizontal sync signals from the
Reference numeral 8 is a character multiplex signal decoding circuit for decoding data of a teletext program from the composite video signal, 9 is a table-of-contents memory for extracting and storing table-of-contents information from the decoded data of the text-broadcast program, and 10 is for the table-of-contents memory 9. Write / read controller,
Reference numeral 11 is a cursor display control unit for displaying and moving the cursor on the screen of the display unit 50. Reference numeral 12 is a changeover switch for switching the screen of the display unit 50 for the television program to the display state of only the main screen (full screen) or the simultaneous display state of two child screens. The first image storage unit 14 for creating the image information of 14 displays the screen of the display unit 50 for the teletext program in the display state of only the parent screen (full screen) or in the simultaneous display state of two child screens. A changeover switch for switching between the two, a reference numeral 15 is a second image storage section for creating image information for a child screen of a teletext program, and a reference numeral 16 is another screen for the teletext program. Switch for switching between the display state (full screen) or the simultaneous display state of two child screens, 1
Reference numeral 7 is a third image storage unit for creating image information for a sub-screen for a teletext program, 18 is a selector switch for switching the selector switch 14 and the selector switch 16 to the character multiplex signal decoding circuit 8, and 19 is a selector switch. About table of contents information Display state of the screen of display unit 50 only for the parent screen (full screen)
Or 20 is a fourth image storage unit for creating image information for the child screen with respect to the table of contents information.

The respective image storage units 13, 15, 17, 20 are
In addition to a memory for storing drawing data, a sample hold circuit and an A / D conversion circuit are incorporated on the input side and a D / A conversion circuit is incorporated on the output side. The changeover switch 12 is changed over between the contact a side and the contact b side based on the changeover signal S ₁ from the changeover control section 4. The video information A ₀ of the television program output from the video / chroma signal processing circuit 6 is converted into a horizontally compressed television image A by passing through the first image storage section 13. The changeover switch 18 is the changeover control unit 4
The contact is switched to the contact c side and the contact d side based on the switching signal S ₂ from Further, the changeover switch 14 is changed over between the contact e side and the contact f side based on the changeover signal S ₃ from the changeover control section 4. The video information B ₀ of the teletext program output from the text multiplexed signal decoding circuit 8 passes through the second image storage unit 15 to be converted into the horizontally compressed teletext video B ₁ . Further, the changeover switch 16 is switched between the contact g side and the contact h side based on the changeover signal S ₄ from the changeover control section 4. The video information B ₀ of another teletext program output from the text multiplex signal decoding circuit 8 is converted into a horizontally compressed teletext video B ₂ by passing through the third image storage unit 17. Further, the changeover switch 19 is changed over between the contact i side and the contact j side based on the changeover signal S ₅ from the changeover control section 4. The table of contents information C ₀ output from the table of contents memory 9 is the fourth
It is converted into a horizontally compressed table-of-contents image C by passing through the image storage unit 20. Each image storage unit 13, 1
5, 17 and 20 are input and connected to the screen switching control unit 30.

Reference numeral 21 is a switch which is inserted in the connection line between the cursor display control unit 11 and the screen switching control unit 30 and is controlled by the ON / OFF signal S ₆ from the switching control unit 4. Reference numeral 23 is a program selection unit that determines which program is selected from a large number of teletext programs by a signal from the gate unit 22. This program selection unit 23 outputs the determined program number signal S ₂₆ to the character multiplex signal decoding circuit. 8 to determine the teletext program to be decoded. The gate unit 22 starts the sub-screen display of the teletext program to be displayed as the sub-screen in response to the program determination signal S ₂₁ and the program number signal S ₂₂ . Reference numeral 30 denotes images A, B ₁ , B ₂ , C from the first to fourth image storage units 13, ₁₅ , 17, ₂₀ .
A screen switching control unit 50 that combines and repeats a predetermined two of them, and a display unit 50 such as a CRT.

FIG. 2 is a circuit diagram showing the detailed contents of the screen switching control unit 30 in FIG. 31 is a sync separation circuit 7
6 is a frequency multiplier that multiplies (doubles) the frequency of the horizontal synchronizing signal E (see FIG. 6A) to generate a clock F (see FIG. 6B), and 32 is a high-speed changeover switch 35 according to the clock F. , 42, 43, 44 to the high-speed switching signal S ₅₀
It is a flip-flop that outputs (see FIG. 6C). 33 is a switch connected to the output side of the first image storage unit 13 and controlled by the on / off signal S ₁₁ , 34 is connected to the output side of the second image storage unit 15 and controlled by the on / off signal S ₁₂ . The switch 35 is switched at high speed by the high-speed switching signal S ₅₀ , and the television image A from the first image storage unit 13 is split into two screens on the left side screen 51 (see FIG. 7A). Is a high-speed change-over switch that simultaneously displays the teletext image B ₁ from the second image storage unit 15 on the right screen 52. 36 is a switch connected to the output side of the second image storage unit 15 and controlled by the on / off signal S ₁₃ , 37 is the switch 3
6, a changeover switch connected to the output side of 6 and controlled by the changeover signal S ₁₄ , 38 is a switch connected to the output side of the third image storage unit 17 and controlled by the changeover signal S ₁₅ , 39 is an output side of the switch 38 And a changeover switch 40 connected to the control circuit 40 and controlled by a changeover signal S ₁₆ , 40
Of the switching signal S ₁₇ connected to the output side of the image storage unit 20 of
The switch 41 is connected to the output side of the switch 40 and is controlled by the switching signal S ₁₈ and the switch 42 is switched at high speed by the high speed switching signal S ₅₀ . A high-speed switch for displaying the broadcast video B ₁ on the left screen 51 and simultaneously displaying the table-of-contents video C from the fourth image storage section 20 on the right-side screen 52, and 43 is a table-of-contents video from the fourth image storage section 20. A high-speed changeover switch for displaying C on the left screen 51 and simultaneously displaying teletext B ₂ from the third image storage unit 17 on the right screen 52, and 44 for the third image storage unit 1
This is a high-speed changeover switch for displaying the teletext image B ₂ from the No. 7 on the left side screen 51 and the teletext image B ₁ from the second image storage unit 15 on the right side screen 52 at the same time. These high-speed changeover switches 35, 42, 43, 44 are connected to the contact r side when the high-speed changeover signal S ₅₀ is "H", and connected to the contact s side when the high-speed changeover signal S ₅₀ is "L". There is. Reference numeral 45 denotes a mixing section for superimposing the above-mentioned image displayed on the two screens and the cursor signal D from the cursor display control section 11.

The vertical / horizontal sync signal E output from the sync separation circuit 7 is sent to the character multiplex signal decode circuit 8, the image storage units 13, 15, 17, 20 and the display unit 50 to control the synchronization of these signals.

Next, the operation of the character multiplex television receiver set as above will be described.

(1) Projection state of FIG. 7 (a) When the two-screen key is operated in the remote controller 1, the instruction is sent to the remote controller receiver 2 by infrared rays, and the remote controller receiver 2 sends a corresponding control signal. It is given to the switching control unit 4. Even when the two-screen key is operated on the operation panel 3, the same control signal is given from the operation panel 3 to the switching control unit 4. As a result, the changeover control unit 4 outputs the changeover signal S ₁ that connects the changeover switch 12 to the contact b side, and the changeover signal S ₂ as the changeover signal S _2.
Is output to the contact c side, and the switching signal S ₃
The changeover switch 14 outputs those that connected to the contact f side as outputs which connect the switch 16 to the contact h side as the switching signal S _4, connecting the switch 19 to the contact j side as the switching signal S ₅ Output what you do. Further, as shown in FIG. 2, the ON / OFF signal S ₁₁ that outputs the switch 33 to the ON side is output, and the ON / OFF signal S ₁₂ that outputs the switch 34 that turns the ON side to the ON side. The on / off signals S ₁₃ , S ₁₅ , and S ₁₇ are output to turn off the switches 36, 38, and 40, respectively. As a result, as shown by the thick line in FIG. 2, the television image A from the first image storage unit 13 and the teletext image B ₁ from the second image storage unit 15 are displayed in screen division. . When the high-speed switching signal S ₅₀ output from the Q terminal of the flip-flop 32 is “H”, the high-speed switching switch 35 is connected to the contact point r side, and the television image A from the first image storage unit 13 is mixed by the mixing unit 45. Is output to the display unit 50 via. Since the period in which the high-speed switching signal S ₅₀ is “H” corresponds to the first half of the horizontal scanning period, the television image A is displayed on the left screen 51 of the display unit 50.
When the high speed switching signal S ₅₀ is “L”, the high speed switching switch 35 is connected to the contact s side, and the teletext video B ₁ from the second image storage unit 15 is output to the display unit 50. Since the period in which the high-speed switching signal S ₅₀ is “L” corresponds to the latter half of the horizontal scanning period, the teletext image B ₁ is displayed on the right screen 52 of the display unit 50. As a result, as shown in FIG. 7A, the television image A is displayed on the left side screen 51 and, at the same time, the teletext image B ₁ is displayed on the right side screen 52.

(2) Projection state of FIG. 7 (b) When the table of contents key is operated on the remote control device 1 or the operation panel 3, a control signal is output from the remote control receiving unit 2 or the operation panel 3 to the switching control unit 4, The switching control unit 4 outputs a drive signal S ₇ to the writing / reading control unit 10,
As a result, the writing / reading control unit 10 controls the character multiplex signal decoding circuit 8 to decode the index information, and writes the index information in the index memory 9. Further, as shown in FIG. 3, the switch 3 is used as an on / off signal S _13.
6 is turned on, the one that connects the changeover switch 37 to the contact k side is output as the switching signal S ₁₄ , and the one that turns the switch 40 on is output as the on / off signal S ₁₇ . A signal for connecting the changeover switch 41 to the contact p side is output as the changeover signal S ₁₈ . The on / off signals S ₁₁ , S ₁₂ , and S ₁₅ are output to turn off the switches 33, 34, and 38, respectively. As a result, as indicated by the thick line in FIG. 3, the second image storage unit 1
The teletext image B ₁ from the image No. 5 and the table-of-contents image C from the fourth image storage unit 20 are displayed in the divided screen. When the high-speed switching signal S ₅₀ from the flip-flop 32 is “H”, the high-speed switching switch 42 is connected to the contact r side, and the television image A from the first image storage unit 13 is displayed on the display unit via the mixing unit 45. Output to FIG.
As shown in (b), when the teletext image B ₁ is displayed on the left side screen 51 and the high speed changeover signal S ₅₀ is “L”, the high speed changeover switch 42 is connected to the contact s side, The table-of-contents image C from the image storage unit 20 is output to the display unit 50, and the table-of-contents image C is displayed on the right screen 52 thereof.

(3) Projection state in FIG. 7C The cursor signal D from the cursor display control unit 11 is also sent to the mixing unit 45, and the cursor is displayed on the screen of the display unit 50. By operating the cross key on the remote control device 1 or the operation panel 3 in the upward or downward direction,
You can move the cursor up and down on the screen,
The program determination signal S ₂₁ is output to the gate section 22 by moving the cursor to the position of the table of contents item where the user wants to see the program content and operating the enter key. The program selection unit 23 uses the coordinate signal S ₂₇ from the cursor display control unit 11.
It is possible to judge which table of contents item has been selected by the coordinate data at the input timing of the program determination signal S ₂₁ sent through the gate unit 22. Further, the program selection unit 23 inputs the address S ₂₅ in the table of contents memory 9 of the currently displayed table of contents item from the writing / reading control unit 10. Therefore, it is possible to judge which index item is selected and which program number the teletext program is finally determined based on the address. The program selection unit 23 sends the determined program number signal S ₂₆ as the determination result to the character multiplex signal decoding circuit 8 and sends the program determination signal S ₂₈ to the switching control unit 4. In order to determine such a teletext program, not only by scrolling the cursor and operating the enter key, but also by sending the program number signal S ₂₂ to the gate unit 22 by key input of the numerical value and the program number indicated by #. You can also do it.

When the program control signal S ₂₈ is input, the switching control section 4 outputs, as the switching signal S ₂ , a signal for switching the changeover switch 18 to the contact d side, and, as shown in FIG. 4, an on / off signal. S ₁₅ outputs a signal for turning on the switch 38, outputs a switching signal S ₁₆ for connecting the switching switch 39 to the contact o side, and outputs an on / off signal S ₁₇ for turning the switch 40 on. And a signal for connecting the changeover switch 41 to the contact q side is outputted as a changeover signal S ₁₈ . It should be noted that the on / off signals S ₁₁ , S ₁₂ , and S ₁₃ are respectively switches 33, 34, and
What outputs 36 to the off side is output. As a result, FIG.
As indicated by a thick line in FIG. 2, a table-of-contents image C from the fourth image storage unit 20 and a teletext image B ₂ from the third image storage unit 17 are displayed.
And will be displayed in split screen. When the high-speed switching signal S ₅₀ from the flip-flop 32 is "H", the high-speed switching switch 43 is connected to the contact point r side, and the table-of-contents image C from the fourth image storage unit 20 is displayed via the mixing unit 45 on the display unit. When the high speed changeover signal S ₅₀ is “L”, the high speed changeover switch 43 is moved to the contact s side while the table of contents image C is displayed on the left side screen 51 as shown in FIG. 7C. connected, teletext picture B ₂ from the third image storage unit 17 is outputted to the display unit 50, the teletext picture B ₂ is issued Film on the right screen 52.

(4) Projection state of FIG. 7D: The next program is selected by operating the cross key of the remote control device 1 or the operation panel 3 and operating the enter key. As shown in FIG. 5, the on / off signal S ₁₅ that outputs the switch 38 to the ON side is output, and the switching signal S ₁₅ is output.
₁₆ outputs a switch connecting the changeover switch 39 to the contact n side, outputs an ON / OFF signal S ₁₃ changing the switch 36 to the ON side, and outputs a changeover signal S ₁₄ connecting the changeover switch 37 to the contact m side. Output what you do. The on / off signals S ₁₁ , S ₁₂ , and S ₁₇ are output to turn off the switches 33, 34, and 40, respectively. As a result, as shown by a thick line in FIG. 5, a state in which the teletext image B ₂ from the third image storage unit 17 and the teletext image B ₁ from the second image storage unit 15 are displayed in split screens. Becomes When the high speed switching signal S ₅₀ from the flip-flop 32 is “H”, the high speed switching switch 44 is connected to the contact point r side, and the teletext image B ₂ from the third image storage unit 17 is passed through the mixing unit 45. When the high speed changeover signal S ₅₀ is "L" while the teletext image B ₂ is displayed on the left side screen 51 as shown in FIG. 7D, the high speed changeover switch 44 is turned on. Contact s
Is connected to the side, the teletext picture B ₁ from the second image storage unit 15 is outputted to the display unit 50, the teletext picture B ₁ issued Film on the right screen 52.

Next, when the table of contents key is operated, FIG. 7B is displayed.
Return to the state of. Hereinafter, similarly, FIG. 7B → FIG.
(C) → The state of FIG. 7 (d) is cyclically repeated.
When it is desired to shift to another screen state, the corresponding key on remote control device 1 or operation panel 3 may be operated.

As described above, according to the present invention, the repeated display of a plurality of programs (videos) when the two screens are displayed is displayed on the right side screen 52 one time before, when some operation is performed. As the image moves to the left side screen 51, a new image is displayed on the right side screen 52, and this repetition is cyclically performed, so that the confirmation of the displayed screen can be made easier to understand.

Although the first screen is the left screen 51 and the second screen is the right screen 52, the invention is not limited to this. For example, conversely, the first screen may be the right screen and the second screen may be the left screen, or the first screen may be the upper screen and the second screen may be the lower screen.

[0028]

According to the television receiver for teletext broadcasting according to the present invention, the image selected later is switched from the second screen to the first screen and the new image is displayed on the second screen. Since it is displayed on the screen, the projection position changes depending on the switching, but the previous image remains, and the previous image of the remaining one is always on the first screen, and new images are always on the second screen. Therefore, it is possible to easily recognize the switching state of the video. In particular, when the table of contents video is displayed on the first screen and the table of contents video is displayed on the second screen, when the table of contents item is selected, the table of contents video is repeated from the second screen to the first screen. Then, the new teletext video is displayed on the second screen, and even in this state, the index video is on the first screen, so that the operability of selecting the index item is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a character multiplex television receiver according to an embodiment of the present invention.

2 is a circuit diagram showing a detailed circuit configuration of a screen switching control unit in FIG. 1 and showing a first operation state.

FIG. 3 is an operation explanatory diagram showing a second operation state of the screen switching control unit.

FIG. 4 is an operation explanatory diagram showing a third operation state of the screen switching control unit.

FIG. 5 is an operation explanatory view showing a fourth operation state of the screen switching control unit.

FIG. 6 is a timing chart of a synchronization signal, a frequency-multiplied clock, and a high-speed switching signal.

FIG. 7 is a screen display state diagram showing respective image projection states in first to fourth operation states.

FIG. 8 is a screen display state diagram in the case of a conventional example.

FIG. 9 is a screen display state diagram in the case of another conventional example.

[Explanation of symbols]

 1 ... Infrared remote control device 2 ... Remote control receiving unit 4 ... Switching control unit 5 ... Television receiving circuit 6 ... Video / chroma signal processing circuit 7 ... Sync separation circuit 8 ... Character multiplex signal decoding circuit 9 ... ... Table of contents memory 10 ... writing / reading control unit 11 ... cursor display control unit 13 ... first image storage unit 15 ... second image storage unit 17 ... third image storage unit 20 ... third 4 image storage unit 23 ... program selection unit 30 ... screen switching control unit 31 ... frequency multiplier 32 ... flip-flop 33, 34, 36, 38, 40 ... switch 35, 42, 43, 44 ... High speed changeover switch 37, 39, 41 ... Changeover switch 45 ... Mixing section 50 ... Display section 51 ... Left side screen (first screen) 52 ... Right side screen (second screen)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigenori Takenaka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A character multiplex signal decoding circuit for decoding data of a character broadcasting program from a composite video signal, and video of a plurality of types of programs including table of contents information from the character multiplex signal decoded by the character multiplex signal decoding circuit. And a means for compressing the separated video, and the screen of the display unit is divided into two to form a first screen and a second screen.
Of the plurality of types of images on the first screen and the second screen, the first selected image is displayed on the first screen, and the second selected image is displayed on the second screen. Every time a certain operation is performed, the image displayed on the second screen is repeated and displayed on the first screen, and at the same time, a new image is displayed on the second screen, and so on. A television receiver for character multiplex broadcasting, comprising a screen switching control unit for repeating. 2. The screen switching control unit is configured to perform a first operation by a certain operation.
Is displayed on the first screen, and at the same time, the table-of-contents image is displayed on the second screen, and the first character-broadcast image is erased by selecting the table-of-contents item, and the table-of-contents image is repeated from the second screen. Instead, a new second
When the teletext image of is displayed on the second screen, the above-mentioned index image is erased by the selection operation of the next table of contents item, and the second teletext image is repeated from the second screen and displayed on the first screen. The television receiver for teletext according to claim 1, wherein a new teletext image is displayed on the second screen at the same time. 3. The television receiver for character multiplex broadcasting according to claim 1, wherein the screen of the display unit is divided into two left and right.