JPH0998388A - Television receiver for teletext broadcasting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reserve an information quantity for a teletext broadcast program to a degree and to obtain an easy to see image pattern for a TV program. SOLUTION: A teletext data extract processing section 30 extracts character data from a text signal decoded by a text signal decode circuit 4, and a code/ character conversion processing section 40 converts the extracted the character data into a character. A character longitudinal scroll processing section 50 updates and stores data of the character while shifting the data one line each based on a synchronizing timing control signal from a synchronization timing control section 18 to read the character in a longitudinal scrolling state. Then a mixing section 23 superimposes video information E of the character in the longitudinal scrolling state onto video information A of a television program, and a display section 24 displays the character E in the longitudinal scrolling state to right and left end screens 110, 120 of a master screen 100.

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, an independent program (news, weather condition, Stock information, night progress, etc.) is related to the technology to scroll simultaneously while the TV program is displayed.

[0002]

2. Description of the Related Art Conventionally, there is a teletext receiver disclosed in Japanese Patent Laid-Open No. 63-189083 as a device for scrolling video information of a teletext program. In this system, the entire fixed program display is vertically scrolled so that the next page can be continuously displayed. However, in this teletext receiver, a teletext program is displayed on the entire screen and vertically scrolled, and it is impossible to simultaneously watch a normal TV program.

There is also a model in which a teletext program can be displayed while a TV program is being displayed. It is shown in FIG.
As shown in (b), the screen of the display unit is divided into a parent screen 200 and a child screen 210, and a television program 401 is displayed on the parent screen 200.
Is displayed, and the teletext program 402 is displayed on the child screen 210. Alternatively, as shown in FIG. 7C, the screens are divided into a first child screen 301 and a second child screen 30.
It is divided into two and the TV program 401 is displayed on the first child screen 301.
There is also a system in which the teletext program 402 is displayed on the second child screen 302.

[0004]

In the case of FIG. 7 (c), the area of the first sub-screen 301 displaying a television program is as small as 1/2 of the full screen, and the rest of the full screen is the second screen. Child screen 3
In the case of 02, the TV program 401 is hidden by the teletext program 402, and there is a problem that the TV program becomes difficult to watch.

In the case of FIGS. 7 (a) and 7 (b), 1/4 or 1/9 of the entire screen is hidden by the teletext program 402, which is a TV program more than the case of FIG. 7 (c). Although the percentage of area hidden is small, a large part of it is hidden by teletext programs, which makes it difficult to see TV programs.

In all of FIGS. 7 (a) to 7 (c), the teletext program 402 is fixed on the entire surface, and a relatively large amount of information can be displayed. This is because the proportion of the display area of teletext programs is relatively large. If the proportion of the display area of the teletext program is reduced, the television program can be easily viewed. However, the amount of information is reduced as a teletext program.

The present invention was devised in view of such circumstances, and an object thereof is to secure a certain amount of information as a teletext program and to make a television program easy to watch.

[0008]

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. A character data extraction processing unit that extracts character data from the character multiplexed signal decoded by the decoding circuit, a code / character character conversion processing unit that converts the extracted character data into character characters, and a synchronization timing control signal is generated based on the synchronization signal. A synchronization timing control unit, a character character vertical scrolling processing unit that reads and stores the character character in a vertical scrolling state by updating and storing the data of the character character by one line based on the synchronization timing control signal, The video information of the character is sent from the video / chroma signal processing circuit. It is characterized in that a mixing unit for video information and superimpose the Levi program.

According to a second aspect of the present invention, there is provided a television receiver for character multiplex broadcasting according to the first aspect, wherein the synchronization timing control signal generated by the synchronization timing control section is video information of a character character in a vertical scrolling state. It is characterized in that a vertically scrolling child screen for one line at the right end of the screen is displayed by vertical scrolling.

According to a third aspect of the present invention, there is provided the character multiplex television receiver according to the second aspect, wherein the synchronization timing control signal generated by the synchronization timing control unit is video information of a character character in a vertical scrolling state. It is characterized in that a vertically scrolling child screen for one line at the left end of the screen is used for vertical scrolling projection.

Since the video information of the character character data is displayed on the child screen of one line at the right end or the left end of the screen, the video information of the television program on the parent screen is easy to see. Still, since the video information of the character character data is vertically scrolled, a considerable amount of information is secured in a fixed time, and the effect of displaying a character broadcast program is sufficient.

A television receiver for character multiplex broadcasting according to a fourth aspect of the present invention is the television receiver for character multiplex broadcasting according to the first aspect, wherein the character data extracting processing section, the code / character character conversion processing section, and the character character vertical scrolling processing section are respectively provided. A pair of left and right sync timing control signals generated by the sync timing control unit causes the video information of the vertically scrolled character character to be vertically scrolled and displayed on the right and left edges of the screen in a vertically long child screen for each one line. It is characterized in that the vertical scroll at the right end, the vertical scroll at the left end, or both of the vertical scrolls can be erased by switching.

If both the right and left circuits are activated, the image information of the character character data is displayed in a vertically scrolling state on the vertically long child screen for one line at two locations, the right edge and the left edge of the screen. It is possible to simultaneously view two types of character multiplex broadcasting having different program contents, and to double the amount of information. By deleting one or both of the two vertical scroll images at the right end and the left end,
The unnecessary vertical scrolling projection can be canceled to make the video information of the television program easy to see.

[0014]

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.

The character multiplex broadcasting programs that can be received by the character multiplex television receiver are 14H to 16H and 14H to 16H within the vertical blanking period of the video signal of the TV program transmitted together with the character multiplex broadcasting. It is superimposed on the horizontal line of 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 the technique of vertical scrolling for independent programs. An independent program is a program that can broadcast its own program regardless of the content of the TV program being broadcast, and can organize various programs. For example, various news, weather conditions, stocks, etc. There is information and the progress of the night game. 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.

[First Embodiment] FIG. 1 is a block diagram showing an electrical configuration of a character multiplex television receiver according to a first embodiment. In FIG. 1, 1 is a television receiving circuit for generating a composite video signal (composite signal) from broadcast radio waves received by an antenna, 2 is a video / chroma signal processing circuit for extracting and processing a video / chroma signal from the composite video signal, Reference numeral 3 is a sync separation circuit for separating vertical and horizontal sync signals from the composite video signal, and 4 is a character multiplex signal decoding circuit for decoding data of a teletext program from the composite video signal. Reference numeral 5 is a character data extraction / writing control unit for extracting character data B from the data of the character broadcasting program decoded by the character multiplex signal decoding circuit 4 and controlling writing to the character data buffer memory 6, and 6 is the extracted character data. It is a character data buffer memory for sequentially storing B at a predetermined address. Character data is made up of 1-byte (8-bit) codes for hiragana, katakana, numbers, etc., and 2-byte (16-bit) for Kanji.
Made with the code. Character data buffer memory 6
Stores the character data included in the received teletext program in the form of a code. Reference numeral 7 is a code read control unit for controlling the reading of the character code B'from the character data buffer memory 6, and 8 is a read address shift circuit for sequentially lowering the read address for the character data buffer memory 6. The address reduction is performed based on the read completion signal a from the code read control unit 7.

The above character data extraction / writing control section 5
The character data buffer memory 6, the code read control unit 7, and the read address shift circuit 8 form a character data extraction processing unit 30.

A character character storage unit 9 stores a character character (bitmap data) corresponding to the character code, and searches the inside according to the character code B'transmitted from the code reading control unit 7. , The corresponding character C is read, transferred to the bit map memory 11 and written. Reference numeral 10 denotes a write address shift circuit that sequentially lowers the write address of the character character C read from the character character storage unit 9 to the bit map memory 11. The operation of the write address shift circuit 10 and the read address shift circuit 8 are performed. The operation of is synchronized with the control of the code reading control unit 7. The basic synchronization is performed by the synchronization timing control unit 18
It is based on horizontal and vertical sync signals from. The above character / character storage unit 9 and write address shift circuit 1
0 and the bit map memory 11 constitute the code / character / character conversion processing unit 40.

Reference numeral 12 is a character read control unit for controlling the reading of the character C from the bit map memory 11, and 13 is a read address shift circuit for sequentially lowering the read address for the bit map memory 11. The address lowering is performed by the character read control unit 12
It is performed based on the read completion signal b from. The basic synchronization of the operation of the character read control unit 12 is based on the horizontal and vertical synchronization signals from the synchronization timing control unit 18. Reference numeral 14 is a character character buffer memory for sequentially storing the data of the character character C read from the bit map memory 11 via the character read control unit 12, and 15 is a vertical character for vertically scrolling the display of the character character. A scroll read control unit, 17 is a vertical scroll write control unit for vertically scrolling the display of character characters, and 16 is a head address increment circuit that increments the write head address by one with respect to the read head address. The vertical scroll read control unit 15 reads the character character data D from a predetermined address of the character character buffer memory 14,
The leading address increment circuit 16 increments the read address given by the vertical scroll read control unit 15 by one and gives it to the vertical scroll write control unit 17, and the vertical scroll write control unit 17 reads the character character for the address. Data D'of the above is written in the character character buffer memory 14 in an overwritten state. As a result, the character E data E read from the character character buffer memory 14 by the vertical scroll read control unit 15 is read.
Will be scrolled vertically. The basic synchronization between the operation of the vertical scroll read control unit 15 and the operation of the vertical scroll write control unit 17 is based on the horizontal and vertical sync signals from the sync timing control unit 18. By timing-controlling the vertical scroll read control unit 15 and the vertical scroll write control unit 17 by these synchronization signals, the character character data E displayed on the display unit 24 via the mixing unit 23 is transferred to the right end of the screen. Is displayed in a vertically scrolling state from the bottom to the top on the vertically long child screen 110 for one line (see FIG. 2). The character read control unit 12, the read address shift circuit 13, the character character buffer memory 14, the vertical scroll read control unit 15, the address increment circuit 16, and the vertical scroll write control unit 17 constitute a character character vertical scroll processing unit 50. are doing.

The character data extraction processing unit 30 is supplied with power from a DC power source via the switch 19, and the code / character conversion processing unit 40 is supplied with DC power from the switch 20, and The character vertical scroll processing unit 50 is supplied with DC power via the switch 21. In addition, the video / chroma signal processing circuit 2 is provided with a display unit 2 such as a CRT via the mixing unit 23.
The vertical scroll read control unit 15 is connected to the vertical scrolling read control unit 15 via the switch 22 to superimpose the read character character data E.
It is connected to the.

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

The television receiving circuit 1 generates a composite video signal from the broadcast radio wave received by the antenna and sends it to the video / chroma signal processing circuit 2, the sync separation circuit 3 and the character multiplex signal decoding circuit 4. The sync separation circuit 3 extracts a horizontal sync signal and a vertical sync signal from the composite video signal and sends them to the sync timing control unit 18. The video / chroma signal processing circuit 2 mixes the video information A of the television program with the mixing section 23.
To send to.

The character data extraction / writing control unit 5 in the character data extraction processing unit 30 extracts the character data B from the data of the character broadcast program decoded by the character multiplex signal decoding circuit 4, and extracts the extracted character data B. The code B'is sequentially stored at a predetermined address of the character character buffer memory 14. Code reading control unit 7
Accesses the character character buffer memory 14, reads the character code B ′ from the character character buffer memory 14, searches the character character storage unit 9 in the code / character character conversion processing unit 40 with the read character code B ′, The corresponding character character (bitmap data) C is read out and the bitmap memory 1
Transfer to 1 and store. When the code reading control unit 7 finishes reading one character code B ′, the reading completion signal a
To the read address shift circuit 8. When the read completion signal a is input, the read address shift circuit 8 lowers the read address for the character data buffer memory 6 by one. As a result, the character code B'from the next address is read. In this way, the character code B ′ is sequentially read from the character data buffer memory 6.

In the code / character / character conversion processing unit 40, the character / character storage unit 9 searches the inside based on the character code B ′ sent from the code read control unit 7, and reads the corresponding character character C. , The character character C is transferred to and written in the bitmap memory 11. The write address shift circuit 10 synchronizes with the read completion signal a from the code read control unit 7 so that only one address to be written in the bit map memory 11 is lowered. As a result, the character code B ′ that is sequentially read out
The character character C corresponding to is sequentially written in the bit map memory 11.

The character read control unit 12 in the character / character vertical scroll processing unit 50 accesses the bit map memory 11, reads the character character C from a predetermined address, transfers it to the character character buffer memory 14, and writes it. When the character read control unit 12 finishes reading one character C, it sends a read completion signal b to the read address shift circuit 13. The read address shift circuit 13 outputs the read completion signal b.
Is input, the read address for the bitmap memory 11 is decremented by one. As a result, the character character C is read from the next address.
In this way, the character character C is sequentially read from the bit map memory 11, transferred to the character character buffer memory 14, and written.

The vertical scroll read control unit 15 accesses the character character buffer memory 14 while performing timing control by the horizontal and vertical synchronization signals from the synchronization timing control unit 18, and stores the data D of the character character written therein. read out. At this time, the head address increment circuit 16 increments the head address for writing by one (one line) with respect to the head address for reading. The vertical scroll writing control unit 17 controls the timing by the horizontal and vertical synchronization signals from the synchronization timing control unit 18, and again reads the data D'of the character character for the incremented address from the character character buffer memory. It writes in 14 in the overwriting state. in this way,
Based on the timing control matched with the horizontal and vertical synchronization signals from the synchronization timing control unit 18, the vertical scroll read control unit 15 and the head address increment circuit 1
6 and the vertical scroll write control unit 17 perform an update storage operation that advances the character character data D ′ by one line in the character character buffer memory 14, so that the vertical scroll read control unit 15 causes the character character buffer memory 14 to operate. The video information E of the character character data that is read out from and transferred to the mixing unit 23 can be vertically scrolled on the child screen 110 for one line at the right end of the screen.

That is, the character character data E read by the vertical scroll read control unit 15 and vertically scrolled is guided to the mixing unit 23 via the switch 22, where the television program from the video / chroma signal processing circuit 2 is transmitted. 2 is superimposed on the video information A of FIG. 2 and characters are displayed on the display unit 24 in the vertically long child screen 110 for one line at the right end of the main screen 100 displaying the video information A of the television program. The video information E of the character data is displayed in a vertical scrolling state from bottom to top. The upward arrow indicates vertical scrolling upward. A concrete state in which the video information E of the character data is vertically scrolled with the passage of time is shown in FIG.
It shows in (a)-(n).

Since the video information E of the character character data is displayed on the child screen 110 of the rightmost one line of the main screen 100, the video information A of the television program on the main screen 100 is easy to see. There is. Still, since the video information E of the character character data is vertically scrolled, a considerable amount of information is secured in a certain time, and the effect of displaying a character broadcast program is sufficient.

When a vertical scroll mode key is operated twice on a remote control device (not shown), each switch 1
When 9, 20, and 21 are turned off, the character data extraction processing unit 30, the code / character / character conversion processing unit 40, and the character / character vertical scroll processing unit 50 are inactive, and the switch 22 is turned off to perform vertical scroll reading. The connection between the control unit 15 and the mixing unit 23 is cut off. Therefore, the vertical scroll display of the video information E of the character character data on the child screen 110 disappears, and the parent screen 100 becomes the full screen to display the video information A of the television program on the entire surface. When the vertical scroll mode key is operated again, the vertical scroll projection state is obtained again.

In contrast to the above, the image information E of the vertically scrolled character character data is displayed on the vertically long child screen 120 for one line at the left end of the parent screen 100, as shown in FIG. It may be configured to do so.

[Second Embodiment] As shown in FIG. 5, a character multiplex broadcasting television receiver according to a second embodiment includes a character data extracting processing unit 30, a code / character character conversion processing unit 40, and a character data extracting processing unit 40 according to the first embodiment. Similar to the character / character vertical scroll processing unit 50, a right vertical scroll control unit including a first character data extraction processing unit 30a for right vertical scroll, a code / character character conversion processing unit 40a, and a character character vertical scroll processing unit 50a. A right vertical scroll control unit 60b including a left-side vertical scrolling second character data extraction processing unit 30b, a code / character character conversion processing unit 40b, and a character / character vertical scroll processing unit 50b is provided. The control unit 60a and the mixing unit 23 are connected via the switch 25. As well as, it is obtained by connecting the right vertical scroll control section 60b and the mixing section 23 through the switch 26. The synchronization timing control unit 18
The synchronization timing control signal necessary for vertically scrolling the right vertical scroll control unit 60a and the right vertical scroll control unit 60b is output.

In the case of the second embodiment, as shown in FIG. 6, the vertical scroll of the video information E ₁ of the character character data is performed on the rightmost one line of the child screen 110 of the main screen 100, and the leftmost one line is displayed. The vertical scroll of the video information E ₂ of the character character data is performed on the minute child screen 120.

If both the switches 25 and 26 are turned on, the video information of the character character data is displayed in a vertically scrolling state on the vertically long child screen for one line at two locations, the right edge and the left edge of the screen. You can see two types of text multiplex broadcasting with different contents at the same time, and the amount of information is 2
Multiply by two.

When the switch 25 is turned off, the vertical scroll projection of the video information E ₁ of the character character data at the right end is erased. When the switch 26 is turned off, the vertical scroll projection of the video information E ₂ of the character character data at the left end is erased. By deleting the vertical scroll projection, the projection of the video information A of the television program on the parent screen 100 becomes easier to see. The user can arbitrarily select which of the left and right vertical scroll projections is to be erased, depending on the content of the teletext program. Both switches 2
Turning off 5, 26 will erase both vertical scroll projections. The appearance of the video information A of the television program on the parent screen 100 becomes easier to see.

By deleting one or both of the two vertical scroll projections at the right end and the left end, unnecessary vertical scroll projection can be canceled to make the video information of the television program easy to see. .

[0036]

According to the television receiver for character multiplex broadcasting of claim 1, claim 2 or claim 3 according to the present invention, the video information of the character character data is displayed at the right end or the left end of the screen. Since it is on the child screen for one line, the video information of the television program on the main screen can be easily seen, and since the video information of the character character data is vertically scrolled, the amount of information in a certain time is considerably large. Is secured, and the effect of displaying teletext programs can be fully exerted.

According to the television receiver for character multiplex broadcasting of the fourth aspect of the present invention, the video information of the character character data is vertically scrolled in the vertically long child screen for two lines at the right end and the left end of the screen. It is possible to simultaneously view two types of character multiplex broadcasts that are displayed in different states and have different program contents, and the amount of information can be doubled. By deleting one or both of the two vertical scroll projections at the right end and the left end, unnecessary vertical scroll projection can be canceled to make the video information of the television program easy to see.

[Brief description of drawings]

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

FIG. 2 is a screen display state diagram showing a state of vertical scrolling in the case of the first embodiment.

FIG. 3 is an operation explanatory diagram showing a specific flow of vertical scrolling in the first embodiment.

FIG. 4 is a screen display state diagram when a vertical scroll portion is provided on the opposite side as a modification of the first embodiment.

FIG. 5 is a block diagram showing a schematic electrical configuration in the case of a second embodiment.

FIG. 6 is a screen display state diagram showing a state of vertical scrolling in the case of the second embodiment.

FIG. 7 is a screen display state diagram showing a state of displaying a teletext program in the case of a conventional example.

[Explanation of symbols]

 1 ... Television receiving circuit 2 ... Video / chroma signal processing circuit 3 ... Synchronous separation circuit 4 ... Character multiplex signal decoding circuit 5 ... Character data sampling / writing control unit 6 ... Character data buffer memory 7 ... Code read control unit 8 ... read address shift circuit 9 ... character character storage unit 10 ... write address shift circuit 11 ... bit map memory 12 ... character read control unit 13 ... read address shift circuit 14 ... character Character buffer memory 15 ... Vertical scroll read control unit 16 ... Start address increment circuit 17 ... Vertical scroll write control unit 18 ... Synchronous timing control unit 23 ... Mixing unit 24 ... Display unit 25 ... Switch 26 ... ... switch 30 ... character data extraction processing unit 30a ... right character data extraction Processing unit 30b ... Left character data extraction processing unit 40 ... Code / character / character conversion processing unit 40a ... Right code / character / character conversion processing unit 40b ... Left code / character / character conversion processing unit 50 ... Character character Vertical scroll processing unit 50a ... right character vertical scroll processing unit 50b ... left character character vertical scroll processing unit 100 ... Parent screen 110 ... Vertical right child screen 120 ... 1 left end line Portrait child screen

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

Claims (4)

[Claims] 1. A character multiplex signal decoding circuit for decoding data of a character broadcast program from a composite video signal, a character data extraction processing section for extracting character data from the character multiplex signal decoded by the character multiplex signal decoding circuit, and an extracted character data extraction processing section. A code / character-character conversion processing unit that converts character data into a character character, a synchronization timing control unit that generates a synchronization timing control signal based on a synchronization signal, and character line data for one line based on the synchronization timing control signal. The character character vertical scroll processing unit that reads out and stores the character character in the vertical scroll state by shifting the data by one by one, and the video information of the character character in the vertical scroll state is superposed with the video information of the TV program from the video / chroma signal processing circuit. It has a mixing section that poses. Television receiver for character multiplex broadcasting. 2. The synchronization timing control signal generated by the synchronization timing control unit is for vertically scrolling projection of video information of a vertically scrolled character character on a vertically long child screen for one line at the right end of the screen. The television receiver for character multiplex broadcasting according to claim 1. 3. The synchronization timing control signal generated by the synchronization timing control unit is for causing vertical scroll display of video information of a character character in a vertical scroll state on a vertically long child screen for one line at the left end of the screen. The television receiver for character multiplex broadcasting according to claim 1. 4. A pair of a character data extraction processing section, a code / character conversion processing section, and a character / character vertical scroll processing section are provided for left and right respectively, and the synchronization timing control signal generated by the synchronization timing control section is a vertical scroll state. The video information of the character character is displayed vertically scrolled on the right and left edges of the screen in a vertically long sub-screen for each line, and by switching, the right vertical scroll or the left vertical scroll or both vertical scrolls can be displayed. 2. The structure according to claim 1, wherein the structure is erasable.
The television receiver for the character multiplex broadcasting described in.