JPH03201880A - Television receiver - Google Patents

Abstract

PURPOSE:To reduce overlook of character information by displaying character information before revision together with character information after revision onto an idle area. CONSTITUTION:A title pattern is displayed at first on a lower side title pattern display area RS2. When the title pattern is revised, the title pattern before the revision having been so far displayed on the lower side title pattern display area RS2 is displayed to an upper side title pattern display area RS1. On the other hand, the title pattern after the revision is displayed on the lower side title pattern display area RS2. Thus, even when the title pattern is overlooked over once, the title pattern is able to be observed again.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) This invention utilizes the free space on the image display area due to the difference in aspect ratio between the image display area and the television signal. The present invention relates to a television receiver that displays text information.

(Conventional technology) Newly developed HDTV system and ED to improve image quality
In high-definition television broadcasting systems such as the TV system, compatibility with current standard television broadcasting systems is taken into consideration. This is because it is conceivable that the current standard television broadcasting system and the high-definition television broadcasting system will coexist for the time being.

By the way, when a current standard television signal is displayed in the image display area of a high-definition display, an empty area occurs due to the difference in aspect ratio between the signals.

In JP-A No. 62-26378 (hereinafter referred to as the document),
A high-definition television receiver that displays text information using this free space has been disclosed.

FIG. 11 is a circuit diagram showing the configuration of the high-definition television receiver described in this document.

In the figure, a current standard television signal input from an input terminal 11 is supplied to a signal conversion circuit 12 and a character multiplex signal separation processing circuit 13. The signal conversion circuit 12 performs scanning line conversion of the current standard television signal, etc., and outputs a current standard television signal that can be displayed on the high-definition display 18. The character multiplex signal separation processing circuit 13 separates the character multiplex signal from the current standard television signal and outputs character data.

Output of signal conversion circuit 12 and character multiplex signal separation processing circuit 1
The outputs of No. 3 are screen-composed by a composite screen creation circuit 15 and supplied to a high-definition display 18. This results in
In the image display area of the high-definition display 18, a current standard television screen and a teletext screen are displayed by screen composition.

Note that 14 selectively selects character data of teletext broadcasting, character data input manually from outside the television receiver via terminal 19, and character data output from character information selection circuit 20 inside the television receiver. This is a character information selection circuit that selects character information and supplies it to the composite screen creation circuit 15.

Further, 16 is a control @J circuit that controls screen composition.

Further, reference numeral 17 denotes a switching circuit which selects either one of the output of the composite screen generation channel 15 and the high-definition television signal manually inputted from the input terminal 21 and supplies it to the high-definition display 18.

FIG. 12 is a diagram showing display areas of a current standard television screen and a teletext screen.

In the figure, R is an image display area of the high-definition display 18. This image display area R is divided into two areas, first and second areas R, , R2.

A current standard television screen is displayed in the first divided area R2, and a teletext screen is displayed in the second divided area R2.

Here, the sentence "'r: hk
The display format of each screen will be explained.

In order to explain this, first, the display format when displaying the text hk transfer screen of the current standard television broadcast on the current standard display will be explained with reference to FIG. 13.

FIG. 13(a) shows a display form when the teletext program is a normal full-screen program.

In the figure, 25 is a current standard display, and R is an image display area of this current standard display 25. Pl is a header text display section of the teletext screen displayed in this image display area R, and P2 is also a duty display section.

The display positions of characters and graphics on the teletext screen are specified based on a unit coordinate system 26 called a unit screen assumed for the physical screen of the image display area R. In addition, the number of characters in the header text display area P1 is in standard horizontal writing mode.
In both high-density horizontal writing modes, the number of characters is 31 (one line), and in the standard horizontal writing mode, the number of characters in the main text display area P2 is 1.
20 characters (15 characters x 8 lines), 496 in strict horizontal writing mode
(31 characters x 16 lines).

FIG. 13(b) shows a display format when the teletext program is a subtitled program.

In this case, the current standard television screen is displayed in the image display area R. The subtitle screen is superimposed in a subtitle display area R5 set at the bottom of the image display area R.

FIG. 14 is a diagram showing a display form when a teletext screen of the current standard television broadcast is displayed in the second divided area R2 of the high-definition display 18.

If the teletext program is a full-screen display program, the teletext screen is displayed in a full-screen display area R21 with an aspect ratio of 3:4 set at the bottom of the second divided area R2. on the other hand,
When the teletext program is a subtitle program, the teletext screen is superimposed horizontally in a one-line subtitle display area R2□ set at the bottom of the second divided area R2.

As mentioned above, in the high-definition television receiver described in the above document, due to the difference in aspect ratio between the image display area R of the high-definition display 18 and the current standard television signal, The vacant sitting area (second divided area R2) is used to display a literary broadcast screen.

However, in this high-definition television receiver, subtitled programs are transmitted in a non-repetitive format, so if you miss one piece of displayed subtitle information, you will not be able to watch it again.

(Problem to be Solved by the Invention) As described above, in the high-definition television receiver described in the above-mentioned document, since subtitle programs are transmitted in a non-repetitive form, the displayed subtitle information is There was a problem that if you missed an episode, you would never be able to watch it again.

Therefore, an object of the present invention is to provide a television receiver that can reduce the possibility of overlooking subtitle information.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention retains the character information every time the character information is updated, and also stores the information already held before the update. A means for outputting text "γ information, and an equal amount of updated character information and unupdated character information outputted from the above means, separated into empty areas sitting in the image display area due to differences in aspect ratio. The system is designed to provide a means for displaying the information.

(Function) According to the above configuration, the character information before the update is displayed in the empty area together with the character information after the update, so that it is possible to reduce oversight of the character information.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram showing the configuration of a one-dog embodiment of the present invention.

In the following description, a typical case will be explained in which the present invention is applied to a current standard television receiver capable of receiving high-definition television signals.

Before explaining the configuration of FIG. 1, an overview of this embodiment will be explained with reference to FIG. 2.

FIG. 2 is a diagram showing the display form of subtitle information in this embodiment.

In the figure, R is a standard display 42 (see Figure 1).
This is the image display area. This image display area R is arranged vertically in the first direction. Second. It is divided into three third regions R+, R2, and Rq. A high-definition television screen is displayed in the first divided region R1 in the center. Upper and lower 2nd. A subtitle screen is displayed in the third divided area R2°R1. R3,
, R62 are the second. This is a subtitle screen display area provided in the third divided area R2, R.

The display contents of the subtitle screen are updated sequentially. The updated subtitle screen is displayed in the lower subtitle screen display area R52.

The subtitle screen before update is displayed in the upper subtitle screen display area R31. That is, the subtitle screen is first displayed in the lower subtitle screen display area R32. Next, when the subtitle screen is updated, the lower subtitle screen display area R82
The pre-update subtitle screen that was displayed in is displayed in the upper subtitle screen display area R5+. On the other hand, the updated subtitle screen is displayed in the lower subtitle screen display area R32. Therefore, even if the user overlooks the subtitle screen once, he or she can view it again, thereby reducing the chance of overlooking the subtitle screen.

Now, based on FIG. 1, a configuration for realizing the above-described processing will be explained.

In the figure, 31 is an input terminal to which a high-definition television signal is supplied. This high-quality television signal is supplied to a signal conversion circuit 32 and a character multiplex signal separation processing circuit 33.

34 is an input terminal to which a current standard television signal is supplied. This current standard television signal is supplied to a switching circuit 41 and the character multiplex signal separation processing circuit 33, which will be described later.

The signal conversion circuit 32 performs scanning line conversion of the input signal to display iI on a standard display 42, which will be described later.
Get a powerful high-definition television signal.

The character multiplex signal separation processing circuit 33 separates the character multiplex signal from the human input signal. This character multiplex signal includes character data and control data. The control data includes address control data and management data.

The character multiplex fJ number separation processing circuit 33 converts character data from code data to display data and outputs the converted data.

This character data is stored in the memory circuit 35 and the character information selection circuit 3.
6. The character data supplied to the memory circuit 35 is sent to the memory 352 or 3 via the switch 351.
53. The character data written in the memory 352 or 353 is read out via the switch 354 and supplied to the character information selection circuit 36.

The Kamishi control data is supplied to the subtitle program detection circuit 37.

This subtitle program detection circuit 37 detects whether the teletext program is a subtitle program based on the control data, and if it is a subtitle program, the switch 37
51 and 354 are reversed.

The character information selection circuit 36 is also supplied with character data output from an external device of the television receiver, such as a personal computer, via a terminal 38. Further, the character information selection circuit 36 is supplied with character data (9, for example, character data such as a channel number) output from three character information generation circuits provided inside the television receiver. The character information selection circuit 36 appropriately selects the four types of character data described above and supplies them to the composite screen creation circuit 40.

In the composite screen creation circuit 40, the output of the signal conversion circuit 32 is supplied to a switching circuit 41. This switching circuit 41 appropriately selects the output of the composite screen creation circuit 40 and the current standard television signal supplied from the input terminal 34 and supplies it to the current standard display 42 .

43 is a composite screen control circuit that controls screen composition. This composite screen control circuit 43 generates various control signals for controlling screen composition based on a display mode switching signal supplied from a terminal 44.

Here, the display mode switching signal is a signal for specifying the display mode. This display mode includes a display mode with screen composition and a display mode without screen composition. Display modes that involve screen composition include, for example: (1) a mode in which a high-definition television screen and a high-definition teletext subtitle screen are combined and displayed (hereinafter referred to as high-definition subtitle screen display mode); (2) a high-definition subtitle screen display mode; A mode that combines and displays the high-definition television screen and the full screen of high-definition teletext (hereinafter referred to as high-definition full-screen display mode) (3) A mode that combines the current standard television screen and the current standard teletext subtitle screen. (hereinafter referred to as the current standard subtitle screen display mode).

In addition, display modes that do not involve screen composition include (4) a mode that displays only a high-definition television screen (
(hereinafter referred to as high-definition television screen display mode) (5) Mode that displays only the current standard television screen (hereinafter referred to as current standard television screen display mode) (6) Displays only the entire screen of high-definition teletext Display mode (7) There is a mode in which only the entire screen of the current standard teletext is displayed.

The above display modes are further divided into cases depending on whether external character data or internal character data is to be displayed.

Note that the display mode regarding teletext is designated by the user independently of whether the actual teletext program is a subtitle screen program, full screen program strength, etc.

The composite screen creation circuit 40 displays the high-definition television signal output from the signal conversion circuit 32 and the character data output from the character multiplex signal separation processing circuit 33 based on the control signal output from the composite screen control circuit 43. Assign positions.

The memory circuit 35 controls the memory 352 or 353 based on the control signal output from the composite screen control circuit 43.
Allocates the display position of literary talent data read from.

The character information selection circuit 36 is connected to the composite screen control circuit 4.
Character data is selected based on the control signal output from 3.

The three character information generation circuits set the generation timing of character pigs based on the control signal output from the composite screen control circuit 43. In other words, the display position allocation of the character data output from the three character information generation circuits is set by the output timing from the three character information generation circuits.

The character information selection circuit 36 controls the character information generation circuit 39 based on the control signal output from the composite screen control circuit 43.
Select the character data to be output from according to the output timing. Further, this character information selection circuit 36 selects character data input manually via a terminal 38 based on a control signal outputted from the composite screen control circuit 43.

Therefore, the display positions of this character data are allocated by the composite screen control circuit 43.

The operation in the above configuration will be explained.

(1) First, the case where the high-quality subtitle screen display mode is set by the display mode switching signal will be described.

Assume now that the switches 351 and 352 of the memory circuit 35 are connected as shown in the figure. As a result, the character data output from the character multiplex signal separation processing circuit 33 is written into the memory 352.

On the other hand, character data before updating is read from the memory 353. This reading is performed in the subtitle screen display area R5□ as described above.
This will be done during the display period.

The character information selection circuit 36 selects the character data read out from the memory circuit 35 and the character data output from the character multiplex signal separation processing circuit 33 and supplies them to the composite screen creation circuit 40.

A synthetic screen creation circuit 40 synthesizes a high-definition television signal outputted from the signal conversion circuit 32 and two character data outputted from the character information selection circuit 36 on a screen. As a result, the high-definition television signal output from the signal conversion circuit 32 is allocated to the first divided area R in FIG. Further, the character block output from the multiplex signal separation processing circuit 33 is allocated to the subtitle screen display area R82 in FIG. At the time these are read out from the memory circuit 35, the character data allocated to the subtitle screen display area R5 in FIG. .

In this state, when the subtitle screen is updated, the switch 351
, 354 are reversed. As a result, the completed data after the update is written to the memory 353, and the character data before the update is read from the memory 352. As a result, the subtitle screen that was previously displayed in the subtitle screen display area R52 is displayed in the subtitle screen display area R5I, and the updated subtitle screen is displayed in the subtitle screen display area R32.

(2) Next, a case where the high-quality full-duplex display mode is specified will be described.

In this case, if the high-definition text hk transmission program is a full-screen program, for example, the high-definition television screen will be displayed above the image display area R in Figure 2, and the entire text broadcast will be displayed in the lower free area. A composite screen is obtained in which both sides are displayed.

That is, in this case, character data output from the character multiplex signal separation processing circuit 33 is selected by the character information selection circuit 36, and character data output from the memory circuit 35 is not selected.

The character pig selected by the character information selection circuit 36 is allocated to the lower side of the image display area R by the composite screen creation circuit 40, as described above.

On the other hand, the high-quality television signal output from the signal conversion circuit 32 is allocated to the upper side of the image display area R by the composite screen creation circuit 40. As a result, a composite screen is obtained in which the high-definition television screen is located above the image display area R and the entire teletext screen is located below.

(3) Next, the current standard subtitle screen display mode will be explained.

In this case, the character information selection circuit 36 selects the character pig output from the character multiplex signal separation processing circuit 33. This character data is processed by the screen composition circuit 40 as shown in FIG.
It is allocated to the subtitle screen display area R5 of b). The switching circuit 41 selects the character data output from the composite screen creation circuit 40 in the '-7:# screen display area R5, and selects the current tank or television signal manually input from the input terminal 34 in the other areas. Select. As a result, a screen as shown in FIG. 13(b) is obtained.

(4) Next, the high-definition television screen display mode will be explained.

In this case, the high-quality television signal output from the signal conversion circuit 32 is allocated to the second divided area R1 in FIG. 2 by the composite screen creation circuit 40. As a result, a screen obtained by removing the subtitle screen from the display screen shown in FIG. 2 is obtained.

(5) Next, the current standard television screen display will be explained.

In this case, the current standard television signal is always selected by the switching circuit 41.

(6) Next, a mode in which only the entire screen of high-definition teletext is displayed will be explained.

In this case, the character information selection circuit 36 selects the character data output from the character multiplex signal separation processing circuit 33. This character data is sent to the second screen by the composite screen creation circuit 40.
After being allocated to the first divided area R1 in the figure, it is supplied to the current standard display 42 via the switching circuit 41.

As a result, a screen is obtained in which the entire screen of the high-definition teletext is displayed in the first divided region R1.

(7) Finally, a mode in which only the entire screen of the current standard teletext is displayed will be explained.

Also in this case, the character data output from the character multiplex signal separation processing circuit 33 is selected by the character information selection circuit 36. This character data is supplied to a marker or display 42 via a composite screen creation circuit 40 and a switching circuit 41. As a result, a screen is obtained in which the entire screen of the current standard teletext is displayed in the image display area R of FIG. 2.

In the display mode described above, the character data given from the terminal 38 or the three character information generation ports is displayed as appropriate after being allocated to a predetermined position by the composite screen control circuit 43.

According to this embodiment described in detail above, it is possible to reduce the chance of overlooking the subtitle screen that is updated sequentially.

This means that each time the subtitle screen is updated, the text data on both sides of the updated subtitle is held, and the text data on the subtitle screen before the update is output, and this is displayed in the display area R52 of the subtitle screen after the update. This is because they are displayed in different display areas R51.

FIG. 3 is a diagram showing a second embodiment of the invention.

In the first embodiment described above, the subtitle screen display areas R5 and R82
2nd respectively. Third divided region R2,R.

I explained the case where it is set to .

On the other hand, in this embodiment, the subtitle screen display area R5I,
Both R5 degrees are set in the second divided region R2.

Although not shown in the figure, the subtitle screen display area R21+
R3, may be set to the third divided region R3.

FIG. 4 is a diagram showing a third embodiment of the present invention.

In the first embodiment, the image display area R is divided into three areas R.
The case of dividing into +, R2, and R1 has been explained.

On the other hand, in this embodiment, the image display area R is set to the first. It is divided into two second regions R1 and R2, with a high-definition television screen displayed in the upper first divided region R1, and subtitle screen display regions R3, R92 in the lower second divided region R2. This is how you set it.

Although not shown in the figure, in the third embodiment, the display area of the high-definition television screen and the display area of the subtitle screen may be interchanged.

FIGS. 5 and 6 respectively show the fourth section of this invention. It is a figure showing the composition of a 5th example.

In the above embodiment, a case has been described in which the subtitle screen display areas R51°R52 are arranged in the vertical direction.

On the other hand, the embodiments shown in FIGS. 5 and 6 show a case where the subtitle screen display areas R5, R, 2 are arranged horizontally.

Here, FIG. 5 shows that in the display form having the three divided regions R, , R2, R, described in FIG.
+R,2 is provided.

On the other hand, FIG. 6 shows a case where subtitle screen display areas R5, R32 are provided in the second divided area R2 in a display format in which two divided areas R, , R2 are H as shown in FIG. shows.

FIG. 7 is a circuit diagram showing the configuration of a sixth embodiment of the present invention.

In the above description, the case where the present invention is applied to a current standard television receiver has been explained.

On the other hand, this embodiment shows a case where the present invention is applied to a high-definition television receiver.

Before explaining the configuration of Figure 7, please refer to Figure 8! (
The display form of the subtitle screen of the current standard teletext will be explained below.

In FIG. 8, R is an image display area of a high-definition display. This image display area R is horizontally arranged in the first . Second
．． It is divided into three third regions R, , R2°R5. A current standard television screen is displayed in the first divided area R3 in the center.

2nd left and right. The subtitle screen of the current standard teletext is displayed in the third divided areas R2 and R1. RSI and R5□ are respectively 2nd. Third divided region R2,R.

This is the subtitle screen display area provided in .

Here, the updated subtitle screen is displayed in the subtitle screen display area R5° on the right side. On the other hand, the left subtitle screen display area R
51, the subtitle screen before update is displayed. That is,
Both sides of the subtitles are first displayed in the subtitle screen display area R5□ on the right side. Next, when the subtitle screen is updated, the subtitle screen before update that was previously displayed in the subtitle screen display area R52 on the right side is displayed in the subtitle screen display area R8 on the left side. On the other hand, the updated subtitle screen is displayed in the subtitle screen display area R5□ on the right side. Therefore, even if the user overlooks the subtitle screen once, he or she can view it again, thereby reducing the chance of overlooking the subtitle screen.

Note that the subtitle screen is usually sent in horizontal writing format.

In contrast, in FIG. 8, the subtitle screen is displayed in a vertical writing format. Therefore, in this example:
Subtitle screens sent in horizontal format will be converted to vertical format.

Now, a configuration for realizing the above-described display will be explained using FIG. 7.

The main differences in Figure 7 from Figure 1 are:
The above-described display is realized by providing a display memory circuit for storing character data and controlling writing and reading of the display memory circuit.

Another point is that the function of decoding the sent character data from code data to display data is provided not in the character multiplex signal separation processing circuit but at the subsequent stage of the character information selection circuit.

Now, the configuration shown in FIG. 7 will be specifically explained.

In FIG. 7, 51 is an input terminal to which a current standard television signal is input. This current standard television signal is processed by a signal conversion circuit 52 and a character multiplex signal separation processing circuit 53.
is supplied to

54 is an input terminal to which a high-definition television signal is manually input. This high-quality television signal is supplied to a switching circuit 62 and the character multiplex signal separation processing circuit 53, which will be described later.

FIG. 7 specifically shows the configuration of the character multiplex signal separation processing circuit 53.

In this character demultiplexing processing circuit 53, the human input signal is
First, it is supplied to the data receiving port path 531. This data receiving circuit 531 separates the character multiplex signal superimposed on the input signal from the input signal, and performs error correction and the like. The output of the data receiving circuit 531 is temporarily stored in a buffer memory 532 and then supplied to a subtitle program detection circuit 55, a character code detection circuit 533, and an address code detection circuit 534.

Character code detection circuit 533 detects character data from received data. This character data is still code data. Address code detection circuit 534 detects address control data specifying the display position of characters from the received data. In addition,
In this case, the display position is a vertical display position designated by the sending side.

The character data detected by the character code detection circuit 533 is supplied to the character information selection circuit 56. This character information selection circuit 56 is also supplied with character data applied to a terminal 57 from a device external to the television receiver, such as a personal computer. Further, the character information selection circuit 56 is also supplied with character data output from a character information selection circuit 58 provided inside the television receiver. Note that these character data are also processed by the multiplex signal separation processing circuit 5.
These are the character data, spacing, and code data output from 3.

The character information selection circuit 56 selects any one of the three types of manual character data and supplies it to five character data generation circuits.

The five character data generation circuits decode input data into display data. This decoded output is written into the display memory circuit 60. The character data written in the display memory circuit 60 is read out as appropriate, and the composite screen creation (b) path 61
is supplied to The current standard television signal output from the signal conversion circuit 52 is further supplied to the composite screen creation circuit 61.

The output of the composite screen creation circuit 61 is supplied to a switching circuit 62. The switching circuit 62 is further supplied with a high-definition television signal input from the input terminal 54 . The switching circuit 62 selects one of these two human input signals and supplies it to the current standard display 63.

The write operation of the display memory circuit 60 is controlled as follows.

That is, the subtitle detection circuit 55 detects whether the current standard teletext program is a subtitle program or an apricot program. This detection output is supplied to the display format conversion circuit 64. This display format conversion circuit 64 further includes the address code detection circuit 53.
Address control data detected by 4 is supplied.

When a subtitle program is detected by the subtitle program detection circuit 55, the display format conversion circuit 64 performs processing on the address control data to convert the display format of the subtitle screen from a horizontal writing format to a vertical writing format.

Then, relative address information is detected from the newly obtained address control data and supplied to the display memory control circuit 66. Here, the relative address information is information indicating the flow direction of the subtitles, that is, the relative address of each character on the subtitles. The display format conversion circuit 64 further converts the detection output of the subtitle program detection circuit 55 into the display memory control circuit 6.
Supply to 6.

Note that the display format conversion operation of the display format conversion circuit 64 can be prohibited by a prohibition signal applied to the terminal 65.

The display memory control circuit 66 further includes a display memory control signal applied to a terminal 67 , relative address information of character data output from the character information generation circuit 58 , and character data selected by the character information selection circuit 56 . Selection information is provided.

Display memory control circuit 66 generates a control signal for writing character data into display memory circuit 60 based on these signals and information.

The read operation of display memory circuit 60 is controlled as follows.

The display memory control circuit 60 is supplied with a control signal for screen compositing from a compositing screen control circuit 68 for controlling the screen compositing operation. The display memory control circuit 66 outputs a control signal for reading character data from the display memory recess 60 based on this control signal and the display memory control signal.

The screen composition operation is controlled by the composition screen control circuit 68 as described above. This composite screen control circuit 68 has a terminal 6
Various control signals for controlling the double-sided compositing operation are generated based on the display mode switching signal applied to the display mode switching signal. For example, a control signal supplied from the composite screen control circuit 68 to the character information selection circuit 56 is used to select character data according to the display mode. Further, the control signal supplied to the display memory control circuit 66 is used to set the read timing of character data according to the display mode. In other words, it is used to allocate the display position of character data.

Further, the control signal supplied to the composite screen creation circuit 61 is as follows:
It is used to allocate the display position of the current standard television signal output from the signal conversion circuit 52.

Note that the five character data generation circuits are constituted by a ROM that stores display buttons. This character data generation circuit 59 has the ability to control the character size of teletext broadcasting H1 by switching its address space in response to a control signal for controlling the character size supplied from the data receiving circuit. There is. Similarly, this character data generation circuit 59 can control the character size of teletext broadcasting, and further the size of characters supplied from the character information generation circuit 58 and the terminal 57, by a character size control signal supplied to the terminal 70. It becomes.

The operation in the above configuration will be explained.

(1) First, a case will be described in which a display mode for displaying a subtitle screen of current standard teletext is set by a display mode switching signal.

In this case, the character information selection circuit 56 is the character code detection circuit 5
Select the character data output from 33. This character data is converted from code data to display data by five character data generators. This conversion output is written into a predetermined memory area (hereinafter referred to as a first memory area) of the display memory circuit 60. The character data written in this first memory area is read out during the scanning period of the subtitle screen display area R5□ in FIG. This readout output is combined with the current standard television signal allocated to the first divided area R in FIG. 8 in the composite screen creation circuit 61. This combined output is supplied to a wide aspect display 63 via a switching circuit 62. As a result, a current standard television screen is displayed in the first divided area R3 in FIG. 8, and a screen in which a subtitle screen is displayed in the subtitle screen display area Rs□ on the right side is obtained.

When the subtitle screen is updated in this state, the updated character data is written to a memory area different from the first memory area (hereinafter referred to as a second memory area) in the display memory circuit 60. It will be done. The character pig written in this second memory area is the subtitle screen display area R in FIG.
52 scanning periods. On the other hand, the character data written in the first memory area is read out during the scanning period of the subtitle screen display area R5I in FIG. 8.

These character data are combined with the current standard television signal by a composite screen creation circuit 61. As a result, the 8th
The current standard screen is displayed in the first divided area R1 in the figure, the updated double-sided subtitle screen is displayed in the subtitle screen display area R82 on the right, and the subtitle screen before the update is displayed in the double-sided subtitle display area R5I on the left. .

Similarly, each time the subtitle screen is updated, the updated character data is written to the first memory area or the second memory area, and the character data held in each memory area is transferred to the subtitle screen. The updated subtitle screen is displayed together with the updated subtitle screen by being alternately displayed in the display area R5□ or R3I.

(2) Next, a case will be described in which the mode for displaying the entire screen of the current standard teletext is set.

In this case as well, the character information selection circuit 56 selects the character data output from the character code detection circuit 533. Further, the display memory control circuit 66 writes this character data into a predetermined memory area of the display memory circuit 60. In this case, there is only one memory area, and each time the subtitle screen is updated, data is written to this memory area. Therefore, in this case, only the updated full screen is displayed.

In this case, the display area of the current standard television screen is set, for example, to area R3 in FIG. 14, and the display area of the entire screen is similarly set to R22.

(3) Next, the operation when a mode for displaying a subtitle screen of high-definition teletext is set will be described.

In this case as well, character data is written into one memory area of the display memory circuit 60. This character data is read out during the scanning period of the subtitle screen display area. The read character data is supplied to the switching circuit 62 via the composite screen creation circuit 61.

This switching circuit 62 selects the character data during the scanning period of the subtitle screen display area, and selects the high quality signal during the other periods. As a result, a screen in which a subtitle screen is inserted into a high-definition television screen is obtained.

(4) Next, the case where the current standard television screen display mode is set will be explained.

In this case, the current standard television signal output from the signal conversion circuit 52 is allocated to the first divided area R1 in FIG. 8, and a display screen obtained by excluding the subtitle screen from the display screen in FIG. 8 is obtained.

(5) Next, the case where the display mode of the high-definition television screen is set will be explained.

In this case, the switching circuit 62 always selects the high-definition television signal.

(6) Next, a case where the full screen display mode of the current standard teletext is set will be explained.

In this case, the received character data is stored in the display memory circuit 6.
After being written to 0, it is read out during the scanning period in the first divided region R1 in FIG. As a result, the entire screen of the current standard teletext is displayed in the first divided area R1.

(7) Finally, the case where the full-screen display mode of high-definition teletext is set will be explained.

In this case as well, after the character data is written into the display memory circuit 60, it is read out in synchronization with image scanning. As a result, the entire screen of the high-quality teletext is displayed in the entire image display area R.

According to the above configuration, it is possible to obtain not only the same effects as the embodiment shown in FIG. 1, but also the following effects.

First, in the case of the above configuration, n data with a small number of bits can be handled as character data at the stage before the character data generation circuit 54, and display data with a large number of bits can be handled only at the stage after the character data generation circuit 54. good. therefore,
The circuit scale can be made smaller than the previous embodiment shown in FIG.

Furthermore, the display position allocation of any of the character data of the teletext broadcast, the character data from the terminal 57, and the character data from the character information generation circuit 58 can be performed all at once by read control of the display memory circuit 60.

Furthermore, since the display data of the three character data mentioned above is outputted from the five character data generating circuits, it is possible to generate the optimal display data for the display 63.

Further, by providing a function to control the size of the characters, the size of the characters can be changed according to the user's preference, so it is possible to provide the recipient with both sides that are easy to read.

Further, the character sizes of the three character data mentioned above can all be controlled by the character data generation circuit 59 at once.

Furthermore, since the display format changing operation of the display memory circuit 65 can be prohibited by a prohibition signal, it is possible to easily change the present standard television receiver. That is, a high-definition television signal and a current standard television signal are applied to the input terminals 51 and 54, respectively, and the display 6
By replacing 3 with a current standard display, a current standard television receiver can be realized.

FIG. 9 is a diagram showing a seventh embodiment of the present invention.

In the embodiment shown in FIG. 7, two subtitle screen display areas Rs
,, A case has been described in which R5□ are set on the left and right sides of the image display area R, respectively.

On the other hand, in this embodiment, only one of the two positions is set.

The figure shows the case where it is set on the right side. Also, in the figure, the image display area R is shown as the first. Second two display areas R,,R2
This shows the case where the current standard television screen is displayed on the left side.

FIG. 10 is a circuit diagram showing the configuration of an eighth embodiment of the present invention.

Note that in Figure 10, the same parts as in Figure 7 are the same.
A detailed explanation will be omitted by adding the number n.

In the embodiment shown in FIG. 7, the display memory circuit 60 is used only for storing character data.

In contrast, in this embodiment, the display memory circuit is also used as an image memory for storing television signals.

In FIG. 10, a television signal to be stored in display memory circuit 73 is supplied from terminal 71 to switching circuit 72. In FIG. This television signal is, for example, a television signal reproduced from a video tape recorder. The switching circuit 72 further includes the character data generation circuit 59.
Character data is supplied from. The switching circuit 72 selects between the two manual inputs. This selection output is written into the display memory circuit 73 by the display memory control circuit 74.

The display memory control circuit 74, like the display memory control circuit 66 in FIG.
At the same time, it also performs television signal writing and reading functions.

In the above configuration, by setting the display memory circuit 73 to a storage capacity capable of storing data for one screen of the current standard television signal, the display memory circuit 73
can be used for both character data and current standard television signal storage.

In this case, the memory space of display memory circuit 73 is used for storing character data and current standard television signals.

In addition, by setting a storage capacity for the display memory circuit 73 that can store data for one screen of high-definition television signals, this display memory circuit 73 can be used to store text data and high-definition television signals or current standard television signals. It can also be used to store signals. In this case, if a high-definition television signal is to be stored as the television signal, the memory space of the display memory circuit 73 is used for storing character data and the high-definition television signal.

On the other hand, if the current standard television signal is to be stored, the current standard television signal and character data can be stored in separate areas in the memory space.

According to the above configuration, since the display memory circuit 73 can be used as an image memory, it is possible to handle not only display of character information but also various image processing.

For example, a function such as displaying the playback screen of a video tape recorder as a frieze image can be easily obtained.

Although several embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above.

For example, in the embodiments shown in FIGS. 7 and 10, the display format is converted by the display format conversion circuit 64, but the display format is converted by reading control of the display memory circuit 60. You can do it like this.

Furthermore, in the above description, the case where the present invention is applied to displaying a subtitle screen has been described. However, the present invention can also be applied to full-screen display.

That is, when displaying a full screen in an empty area caused by a difference in aspect ratio, the entire empty area is not used for displaying the entire screen. Therefore, by using two full-screen top areas in the free space, the entire screen before and after the update can be displayed in the same area (2) and (r).

Furthermore, in the above description, a case has been described in which the present invention is applied to displaying text information of teletext broadcasting. However, the present invention can be applied to displays of character information that are updated sequentially.

It goes without saying that the present invention can be modified in various other ways without departing from the spirit thereof.

[Effects of the Invention] As described above, according to the present invention, character information before and after updating is displayed simultaneously, so that it is possible to significantly reduce oversight of character information.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the configuration of the first embodiment of the present invention,
2 is a diagram showing the display format of FIG. 1, FIG. 3 is a diagram showing the display format of the second embodiment of this invention, and FIG. 4 is a diagram showing the display format of the third embodiment of this invention. 5 is a diagram showing the display form of the fourth embodiment of this invention, FIG. 6 is a diagram showing the display form of the fifth embodiment of this invention, and FIG. 7 is a diagram showing the display form of the fifth embodiment of this invention. FIG. 8 is a diagram showing the display format of FIG. 7, FIG. 9 is a diagram showing the display format of the seventh embodiment of the present invention, and FIG. 10 is a diagram showing the display format of the seventh embodiment of the present invention. FIG. 11 is a circuit diagram showing the configuration of a conventional television receiver, and FIGS. 12 to 14 are circuit diagrams showing the configuration of a conventional television receiver.
FIG. 2 is a diagram for explaining the operation of FIG. 1; 31.34, 51.54...Input terminal, 32°52.
... Signal conversion concave path, 33.53... Character multiplex signal separation processing circuit, 35... Memory circuit, 36.56... Character information selection circuit, 37.55... Subtitle information selection circuit,
38,44. '57, 65.67.6Q, 7 (1°71
. . . terminal, composite screen creation circuit, 39.58 . . . character information generation circuit, 40. 61 . . . double-sided composition circuit, 41.
62.72...Switching circuit, 42...Standard display, 43.59...Character data generation circuit, 60°73
...Display memory circuit, 63...High quality display, 64...Display memory circuit, 66.74...Display memory control circuit, 68...Composition screen control circuit. Representative of the deceased Patent attorney Takehiko Suzue 1411 1-1 Figure 8

Claims (2)

[Claims] (1) Character information output means that outputs character information that is sequentially updated; and each time the character information is updated, it retains the updated character information that is output from the character information output means, and also stores the character information that has already been stored. a television that displays a television signal having an aspect ratio different from that of the image display area in a first display area set as a part of the image display area; a second display area excluding the first display area from the image display area;
The television is characterized by comprising, in the display area, character information display means for simultaneously displaying character information output from the character information output means and character information output from the character information holding means in a separated state. john receiver. (2) The television receiver according to claim 1, wherein the text information is text information of teletext multiplex broadcasting.