JPH08154217A - Television receiver - Google Patents

Abstract

PURPOSE: To realize a television receiver in which the image of a television broadcast program and the image of a teletext program are viewed simultaneously while distinguishing them. CONSTITUTION: A character image processing section 22 converts character extracted by a character data extract circuit 21 into character image data and the image data are written in a video RAM 23. On the occurrence of a character image display request, a display area forming circuit 30 forms a character image display area, and a character image display control circuit 31 forms a character image to be displayed on the area and the character image is displayed in a scroll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver suitable for viewing teletext.

[0002]

2. Description of the Related Art A teletext program is provided by teletext data superimposed on a vertical blanking period of a video signal of a television broadcasting wave. Then, the receiving side extracts the teletext data, decodes it, forms an image signal of a character image of a character or a figure based on the decoded data, and displays the character image on a display such as a cathode ray tube.

In displaying the character image, instead of the image of the television broadcast program, only the character image is displayed on the entire screen of the display, and the character image is changed to the character image to be displayed next after a certain period of time elapses. Display in a so-called full-screen mode is common, but character images are also displayed with an image of a television broadcast program as a background.

[0004]

However, when trying to view an image of a teletext program in the full-screen mode, it becomes impossible to view an image of a television broadcast program. That is, the user can only watch either the teletext program or the normal television broadcast program.

Further, in the display mode in which the character image is displayed with the image of the television broadcast program as the background, the image of the television broadcast program is overlapped with the character image of the character broadcast program, and both images are difficult to see. I will end up.

In view of the above, it is an object of the present invention to provide a television receiver capable of simultaneously and distinctively viewing an image of a television broadcast program and a character image of a teletext program.

[0007]

In order to solve the above-mentioned problems, when the television receiver according to the present invention is made to correspond to the reference numerals of the embodiments described later, an image display means 18 for displaying an image of a television broadcast program, Display request generation means 200 for generating a display request for a character image by a character broadcast program
And a character image display area forming means 30 for forming an area signal indicating a character image display area for displaying a character image on a part of the screen of the image display means 18, and character data superimposed on the video signal is extracted. Then, the character data decoding means 21 for decoding, and means 22 for forming character image data for displaying a character image based on the data from the character data decoding means 21 and storing it in the character image memory 23.
When a character image display request is made, the character image data for each character image display area is stored in the character image memory 2
Character image display control means 31 and 33 for sequentially reading from 3 and displaying in a scroll display mode in the character image display area on the screen.

[0008]

In the present invention having the above-mentioned structure, the character data decoding means 21 extracts the character data superimposed on the received video signal, decodes it, supplies it to the character image processing means 22, and decodes it. Character image data for displaying a character image is formed based on the character data and written in the character image memory 23.

When a character image display request is issued, the character image display area forming means 30 indicates a display area signal for designating a character image display area which is a partial area of the screen of the image display means 18 for displaying a character image. Is formed.

Then, the character image display control means 31, 33
Thus, the character image data for each character image display area is read from the character image memory 23, and the character image is scroll-displayed in the character image display area.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a television receiver according to the present invention will be described below with reference to the drawings.

[First Embodiment] A method of displaying a character image in a television receiver of this example is the display in the full-screen mode described as the prior art, or the character image is displayed with the image of a television broadcast program as a background. Unlike the display method described above, when a character image display request is made in response to the user selecting a character broadcast program, an area for displaying only the character image is provided in a part of the display screen, and the character image is scrolled in this area. By doing so, it will be displayed.

In the television receiver of this example,
The area for displaying the character image is formed at a predetermined position on the lower side of the display screen.

FIG. 1 is a block diagram of an embodiment of the television receiver of this example. In FIG. 1, 100 is
The signal system of the television receiver of this example is shown, and the tuner unit 11, the audio processing unit 12, the audio amplification circuit 13, the speaker 14, the video processing unit 15, the video synthesis circuit 16, and the RG.
B driver 17, display 18, sync separation circuit 1
9, character data extraction circuit 21, character image processing unit 2
2, a character image display area forming circuit 30, a character image display circuit 31, and a character display controller 33 for controlling the formation of the character image.

Reference numeral 200 denotes a control system of the television receiver of this example, which includes a bus 201, a CPU 40, a program ROM 41, a RAM 42, a key operation section 43, a remote control commander 51, a remote control signal receiving section 52, and a remote control signal decoding section. It is equipped with 53.

Then, the television receiver of this example is
It is possible to perform remote control with the remote control commander 51. The remote control commander 51 is provided with a teletext program selection button, and when the user operates this button, a teletext program selection request is formed and transmitted as an infrared remote control signal, for example. Of course, the remote control commander 51 forms and sends out a remote control signal for turning on / off the power of the television receiver, selecting a television broadcast wave, adjusting the volume, and the like, as in the usual case.

The infrared remote control signal sent from the remote control commander 51 is supplied to the control system 200 via the remote control signal receiving section 52 and the remote control signal decoding section 53. Then, the CPU 40 reads the program from the program ROM 41 and executes the program according to the supplied remote control signal, and supplies a control signal to each unit via the bus 201. The control system 200 issues a character image display request when the remote control signal is a teletext program selection request, and as described later, various types of displaying the character image in a partial area of the image of the television broadcast program. Generates the control signal of.

Further, the control system 200 turns on / off the power supply of the television receiver, a tuning process in the tuner section 11,
A sound volume adjusting process in the voice processing unit 12 is also executed.

Then, the user selects the remote control commander 51.
When the channel selection information is provided by operating, the control system 200 supplies the tuner section 11 with a channel selection signal corresponding to the channel selection operation.

The tuner unit 11 of this example includes not only a channel selection processing unit but also an intermediate frequency amplification unit, an audio detection unit, and a video detection unit. The audio signal demodulated by the tuner unit 11 is supplied to the speaker 14 via the audio processing unit 12 and the audio amplification circuit 13, and the audio of the TV program selected by the speaker 14 is emitted. It

On the other hand, the video signal demodulated by the tuner unit 11 is supplied to the video processing unit 15 and the sync separation circuit 19 as a video signal.
Is supplied to the character data decoding unit 21.

The video processing section 12 carries out a series of processes for forming the three primary color signals R, G, B from the video signals supplied thereto.

The three primary color signals R, G, B formed in the video processing unit 12 are supplied to the display 18 via the video synthesizing circuit 16 and the RGB driver 17, and the screen of the display 18 displays images of television broadcast programs and the like. A composite image with a character image described later is displayed.

On the other hand, in the sync separation circuit 19, a horizontal sync signal H and a vertical sync signal V are supplied from the video signal supplied thereto.
And are separated. The horizontal synchronizing signal H and the vertical synchronizing signal V are supplied to a deflection system (not shown), and are also supplied to the display area forming circuit 30 and the character data extracting circuit 21.

The character data extracting circuit 21 extracts and extracts the character data superimposed in a predetermined horizontal scanning period of the vertical blanking period of the video signal based on the horizontal synchronizing signal H and the vertical synchronizing signal V. The character data is supplied to the character image processing unit 22.

Under the control of the control system 200, the character image processing section 22 forms one screen of character image data for displaying a character image based on the character data, and stores it in the video RAM 23. Do.

In this case, the user selects the remote control commander 5
When the selection operation of the teletext program is performed in step 1, the control system 200
The character image data of the selected teletext program is sequentially written in the video RAM 23 by the character image processing unit 22 in accordance with the control signal according to the above selection operation. Further, the control system 200 supplies a control signal to the display area forming circuit 30 and the controller 33 in order to display a character image.

The control signal supplied to the display area forming circuit 30 includes position information of the start and end of the display area in the vertical and horizontal directions. In the display area forming circuit 30, the horizontal scanning lines are counted on the basis of the vertical synchronizing signal V,
By comparing the vertical position information (horizontal scanning line position based on the vertical synchronizing signal) supplied as the control signal and detecting the matching horizontal scanning line, the vertical display area is grasped.

The display area forming circuit 30 also counts the horizontal position of the display screen by using the clock signal corresponding to the horizontal position of the display screen with reference to the horizontal synchronizing signal H, and outputs the control signal. The horizontal display area is grasped by comparing with the horizontal position information supplied as.

Then, the vertical, which is grasped as described above,
The overlapping area in both horizontal directions is the display area of the character image. The signal WD1 indicating this area is supplied to the display area forming circuit 3
0, the signal WD1 is supplied as a blanking signal to the signal synthesizing circuit 16 and is also supplied to the controller 33 as a character image display area signal.

As a result, a character image display area R is formed at a predetermined position below the display screen 18, as shown in FIG. In the case of this example,
The character image display area R is an area in which one line of the character image can be displayed.

Then, as shown in FIG. 2, in the television receiver of this example, the character image is displayed in the character image display area R in such a manner that the character image is horizontally scrolled from the right side to the left side of the area R at a constant speed. Is displayed.

The display of the character image in the scroll mode is
This is performed by the address control of the video RAM 23 and the display memory 32 by the controller 33. That is, the controller 33 includes the video RAM 23 and the display memory 32.
The read / write address of the character image data with respect to is formed. Therefore, the controller 33 includes the clock generator 34, and the character image display area signal WD1
And the horizontal and vertical synchronizing signals H and V are supplied to form an address synchronized with these signals, and the video RAM 2
3, reading character image data from the display memory 32,
Control writing.

The transfer of character image data from the video RAM 23 to the display memory 32 is performed once per clock from the controller 33. Then, the display memory 32 is
What is written is composed of a so-called FIFO memory in which the written data is immediately read out, and the character image data which changes by writing in one clock cycle is
It is supplied to the video composition circuit 16.

In the video synthesizing circuit 16, the video signal from the video processing unit 15 is blanked by the signal WD1 from the display area forming circuit 30 in the above-mentioned area R, and the blanked area R is described later. The video signals from the character image display control circuit 31 are combined so as to be inserted. The combined video signal is supplied to the display 18 via the RGB driver 17, whereby a character image is displayed in the character image display area R shown in FIG.

In the video RAM 23, 1 over a plurality of lines
Character image data for the screen is stored. In this case, the video RAM 23 has a plurality of vertical lines,
For example, one line of character image data is stored in n lines.

Then, under the address control by the controller 33, the pixel data D1 of the character image of each of the n lines at the first horizontal address position of the video RAM 23 is read. The pixel data read from the video RAM 23 is supplied to the display memory 32 of the character image display control circuit 31.

The display memory 32 of this example has a storage area for storing character image data for one line, and the video RAM 2
Similarly to 3, the character image data for one line is stored by n lines in the vertical direction.

Then, the head pixel data D1 of the n line read from the video RAM 23 is the controller 33.
By the address control of, the data is written in the address position of the display memory 32 corresponding to the rightmost end of the region R in the horizontal direction.
Then, in the character image display control circuit 31, the display memory 3
The data of No. 2 is read, D / A converted, and supplied to the video composition circuit 16. Therefore, in the region R, an image based on the pixel data D1 at the first horizontal address position of the first line of the character image is displayed.

At the next clock timing, the video RA
The character pixel data D1 at the first address position and the character pixel data D2 at the second address position on the n-th line are read from M23, and are read to the address position corresponding to the rightmost end of the region R of the display memory 32. , So that the pixel data D2 at the second address position from the video RAM 23 is written, and the first and second pixel data D1,
D2 is written in the display memory 32.

In this way, the character image data is read from the video RAM 23 by sequentially adding pixel data at addresses that are horizontally shifted by one address at each clock timing. Then, the newest character pixel data read from the video RAM 23 is stored in the address at the right end of the region R and at the address corresponding to the leftmost part of the region R in the other character pixel data. Written. Thus, as shown in FIG. 2, the display 18 scrolls from the right end to the left end of the character image display area R as shown in (A) → (B) → (C) → (D). A character image is displayed.

When all the lines of the character image data written in the video RAM 23 have been displayed, next, from the character pixel data at the second address in the horizontal direction on the first line to the second line. The character pixel data at the first address position in the horizontal direction is read and written in the display memory 32 as described above. As a result, the character pixel data at the first address in the horizontal direction on the first line is moved outside the character image display region R, and the first character image data on the second line in the horizontal direction is displayed in the first character image. It is added to the rightmost end of the region R in addition to the data, and is connected to the character image on the first line to display the character image on the second line.

Then, the start position and the end position of reading the character image from the video RAM 23 are sequentially set to 1 in the horizontal direction.
The display memory 32 is read so as to be shifted by the address.
The character image data for one line of the character image is written in. As a result, all the character images over a plurality of lines stored in the video RAM 23 are displayed in the region R in a manner of horizontally scrolling.

Also, for example, by operating the scroll direction selection button provided on the remote control commander 51, the television receiver of this example causes the character image display area R to scroll the character image in the vertical direction. Can be displayed. The display by scrolling the character image in the character image display area R in the vertical direction will be described below.

In this case, the vertical scroll movement is performed by one line for each clock from the controller 33, and the display memory 32 is immediately written after the writing in the same manner as described above. Reading is performed and a character image is displayed in the area R.

In the case of vertical scrolling, the character image written in the video RAM 23 is the controller 3
Under the control of 3, the address positions in the vertical direction are shifted downward in the vertical direction one by one, and n lines are read out. However, one line is added from the first line to the nth line.

That is, first, one line of character image data at the first vertical address position of the video RAM 23 is read out, and this data is written to the line at the lowest vertical address position of the display memory 32. .

Therefore, the character image of the first line in the vertical direction of the video RAM 23 is displayed on the bottom line of the character image display area R shown in FIG.

Next, the character image data of the line at the first address position in the vertical direction and the character image data of the line at the second address position in the vertical direction are read from the video RAM 23. And the controller 3
Under the control of 3, the character image data of the line at the second vertical address position is written to the address position corresponding to the lowermost vertical line of the region R in the display memory 32. The character image data of the th line is written in the display memory 32 at the address position of the line one line above the bottom of the region R in the vertical direction.

As a result, a character image obtained by adding the second character image in the vertical direction to the character image in the first vertical direction in the video RAM 23 and the second character image in the vertical direction is displayed in the character image display area R. .

In this way, 1 line of the video RAM 23 is assigned to all n lines forming one line of the display memory 32.
When the character image at the n-th address position is sequentially added and written from the character image at the second address position, the controller 33 then causes the character image data of the line at the second address position in the vertical direction of the video RAM 23 to be written. , The character image data of the (n + 1) th line in the vertical direction is read.

Then, the character image data of the newest line read from the video RAM 23 is written into the address corresponding to the lowermost line of the display memory 32, and is read in the reverse order from the bottom to the top. The character image data of each line is written by changing the address in the direction by one address. Then, as described above, the storage content of the display memory 32 is converted into an analog video signal and supplied to the display 18, so that the character image of the next line is added to the character image of the previous line and displayed. .

In this way, by displaying a character image in a manner of scrolling in the vertical direction, as shown in FIG. 3, the vertical direction changes as shown in (A) .fwdarw. (B) .fwdarw. (C) .fwdarw. (D). Display can be performed by scrolling.

As described above, the television receiver of this example can display the character image in the predetermined character image display area R in a scrolling manner in the horizontal and vertical directions. Thereby, even in the full-screen mode or the mode in which the image of the television program is displayed as the background, the image of the normal television program and the character image can be viewed simultaneously and separately.

[Second Embodiment] Next, a second embodiment of the television receiver according to the present invention will be described.

FIG. 4 is a block diagram for explaining the television receiver of the second embodiment. In FIG. 4, reference numeral 60 denotes a signal system of the television receiver of this example, which includes two tuner units 61a and 61b, and a video processing unit 62a provided so as to correspond to each tuner unit 61a and 61b. 62b, a switching circuit 63, a two-screen processing unit 64, a switching circuit 65, a display mode processing unit 66,
The image synthesizing circuit 67, the CRT driver 68, and the display 69 are provided.

Reference numeral 80 represents a control system of the television receiver of this example, which includes a system bus 81 and a CPU.
82, a key operation unit 83, a program ROM 84,
A RAM 85 used as a work area or the like is provided.

Further, as in the first embodiment, a remote control signal decoding section 93 and a remote control signal receiving section 92 are connected to the control system 80 of this example in order to enable remote control. The remote control signal sent from the remote control commander 91 is received, decoded, and supplied to the control system 80. This allows the remote control commander 9
Through 1, the user can remotely control the television receiver of this example.

The display 69 of the television receiver of this example is a cathode ray tube having a so-called wide screen with an aspect ratio of 16: 9.

Then, the television receiver of this example is
A mode in which an image created with a horizontal-to-vertical ratio of 16: 9 is displayed on a wide screen of the display 69 (hereinafter referred to as full mode), and a normal NTSC system horizontal-to-vertical ratio is 4: 3. It has a mode for displaying a displayed image (hereinafter referred to as 4/3 image) in various modes.

For example, as shown in FIG.
A mode in which the vertical direction of the image is made to correspond to the vertical direction of the wide screen and the 4/3 image is displayed with the non-image part (the part where no image is displayed) formed at the left and right ends of the screen ( Hereinafter, referred to as a normal mode). In this normal mode, the image display area G can be moved in the horizontal direction, and when the area G is moved to the left side of the screen as shown in FIG. 5B, the non-image area is displayed only on the right side of the screen. Ma occurs, and when the area G is fully shifted to the right, the state becomes as shown in FIG. 5C, and the non-image area Mb occurs only on the left side of the screen.

Furthermore, two tuner sections 61a and 61b
Since it is possible to receive and tune in two TV broadcast waves by having the above, as shown in FIG. 6, two image display areas G1 and G2 are provided on the screen, and 4/3 images are provided in each area G1. And G2 to display two 4 /
It also has a mode in which two three images are displayed side by side in the horizontal direction and are displayed with the non-image areas M3 and M4 formed at the upper and lower ends of the screen (hereinafter referred to as the two-screen mode).

In this two-screen mode, the image display areas G1 and G2 can be moved together in the vertical direction, and when the areas G1 and G2 are moved to the upper side of the screen, the non-image area is moved to the lower side. When the areas G1 and G2 are moved to the lower side of the screen, the non-image area is only the upper non-image area M3.

The image displayed on the wide screen in each of the above modes is formed by signal processing.

The various display modes described above are executed by an operation of designating a display mode performed by the user via the remote control commander 91 operated by the user. That is, the remote control commander 91 is provided with, for example, a two-screen processing button switch, a display mode switching button switch, etc. for selecting the various modes described above.

When the user operates these button switches, the corresponding remote control signal is sent from the remote control commander 91. The control system 80 that receives this remote control signal forms a control signal based on the remote control signal and supplies the control signal to each related unit. As a result, the full mode, the normal mode, the zoom mode, and the two-screen mode are executed.

By operating the image display position changing button of the remote control commander 91, when the normal mode or the two-screen mode is selected, the image display area is changed.

The television receiver of this example can also receive a character broadcast and display a character image, and the remote control commander 91 is provided with a character broadcast program selection button.

In the case of this example, the tuner section 61a
The video signal output from the switching circuit 63 is supplied to the video processing unit 62a, where it is subjected to amplification processing and the like, and then the switching circuit 63a.
Is supplied to the input end a of the two-screen processing unit 64. Similarly,
The video signal output from the tuner unit 61a is supplied to the video processing unit 62b, where it is subjected to amplification processing and the like, and then supplied to the input end b of the switching circuit 63 and the dual screen processing unit 64.

A switching control signal CTR1 from the control system 80 is supplied to the switching circuit 63, and the tuner section 61 of the user is supplied.
The switching circuit 63 is switched to either the one input terminal a or the other input terminal b according to the selection operation of a and 61b. The output signal of the switching circuit 63 is the switching circuit 65.
Is supplied to one of the input terminals a.

On the other hand, the two-screen processing unit 64 performs the above-described processing for the two-screen mode. That is, an output video signal is formed in such a manner that two 4/3 images from the tuner sections 61a and 61b are displayed side by side in the horizontal direction. The output video signal of the dual screen processing unit 64 is supplied to the other input terminal b of the switching circuit 65.

The switching circuit 65 is input to the input terminal a side in the one-screen mode for displaying an image by the output of one of the tuner sections 61a or 61b by the control signal CTR2 from the control system 80, and is input in the two-screen mode. It is switched to the end b side. Then, the video signal output from the switching circuit 63 is supplied to the display mode processing unit 66 via the switching circuit 65.

The CTR1 and CTR2 are generated by the control system 80 according to the user's remote control operation.

In the display mode processing section 66, based on the control signal from the control system 80 in response to the user's display mode selection operation, the normal mode or the two-screen mode as described in FIGS. , Perform processing for full mode. That is, in the normal mode, 4
The horizontal position of the display area G of the / 3 image is set to the position specified by the user, and the non-image areas M1 and M are displayed.
2, Ma, Mb are formed. That is, for example, when the user selects the normal mode, the display mode processing unit 66.
Compresses the supplied video signal in the horizontal direction and the vertical direction and, as shown in FIG.
A video signal for displaying three images is formed. At this time, as described above, the non-image areas M1 and M2 are formed at the left and right ends of the image display area G displaying the 4/3 image.

The display mode of FIG. 5A is an initial display mode in the normal mode of the television receiver of this example. Then, as described above, in the case of this example, by operating the image display position changing button of the remote control commander 91, the image display area G is displayed as shown in FIGS. 5 (A), 5 (B) and 5 (C). The horizontal position can be changed.

In the normal mode, the display mode processing unit 66 sends the non-image areas M1, M2, Ma and Mb.
A signal WD2 indicating the position on the screen is output.

Similarly, in the 2-screen mode, 2
As shown in FIG. 6, which position in the vertical direction the two screens combined by the screen processing unit 64 are to be displayed is determined according to the user's operation through the remote controller. At this time, as described above, the non-image areas M4 and M5 are formed.

That is, when the user selects the two-screen mode, the switching circuit 65 causes the control signal CT from the control system 80 to be sent.
It is switched to the input terminal b side by R2. At the same time, a signal indicating that the two-screen mode has been selected is also supplied to the display mode processing unit 66 from the control system 80, and the two-screen processing described above is performed.

The video signal combined in the dual screen processing unit 64 is supplied to the display mode processing unit 66 via the switching circuit 65. As a result, on the screen of the display 69, as shown in FIG. 6A, two images are displayed in the horizontal direction of the screen, and the images are displayed in a display mode in which the non-image areas M3 and M4 are formed at the upper and lower ends of the screen. Is displayed. Note that FIG.
The display mode of (A) is an initial display mode in the two-screen mode.

Even in the two-screen mode, as in the normal mode described above, by operating the display position changing button of the remote control commander 91, as shown in FIG.
The display position of the image can be changed as in (B) and (C).

At this time, the display mode processing unit 66
From the signal WD indicating the non-image areas M3, M4, MA, MB
2 is output.

And, in particular, in this example, as described above,
A character image by teletext is displayed at a predetermined position of the non-image part generated in the normal mode and the two-screen mode.

As shown in FIG. 4, reference numeral 70 denotes a character image processing system of the television receiver of this example, which includes sync separation circuits 71a and 71b, switching circuits 72 and 73, and a character image processing section 74. , A character image display control circuit 76 and a controller 78.

The video signal from the tuner section 61a is supplied to the sync separation circuit 71a and the input terminal a of the switching circuit 73, and the video signal from the tuner section 61b is input to the sync separation circuit 71b and the switching circuit 73. b.

The sync separation circuits 71a and 71b respectively detect the horizontal sync signal H from the video signals supplied to them.
The vertical synchronizing signal V is separated from the input terminal a of the switching circuit 72,
supply to b.

The switching circuit 72 includes tuner units 61a and 61a.
The horizontal synchronizing signal H and the vertical synchronizing signal V of which video signal b are output are switched. Similarly, the switching circuit 73
Switches which of the video signals of the tuner units 61a and 61b is to be output.

The switching circuits 72 and 73 are connected to the control system 8
It is switched by the control signal CTR3 supplied from 0.

The control signal CTR3 is formed in the control system 80 in response to the supply of the remote control signal sent from the remote control commander 91 by operating the button for selecting and receiving the character broadcast provided on the remote control commander 91. It is what is done.

Then, the horizontal and vertical synchronizing signals H and V from the switching circuit 72 and the video signal from the switching circuit 73 are supplied to the character image processing section 74.

The character image processing unit 74 is the same as that formed by the character data extracting circuit 21 and the character image processing unit 22 in the first embodiment described above. And the first
Similar to the embodiment described above, the character data superimposed in a predetermined horizontal scanning period of the vertical blanking period of the video signal is extracted.

Then, the character image processing section 74 sends the extracted character data to the control system 80, and refers to a character generator (not shown) of the control system 80 to convert the character data into character image data. The converted character image data is returned to the character image processing unit 74 via the bus 81 and written in the video RAM 75. Video RAM7
In 5, the character image data for one screen is written.

When the user operates the teletext program selection button on the remote control commander 91, the control system 80
Outputs a character image display request.

The control system 80 grasps the current display mode and display mode, and judges whether or not there is a non-image area.

Then, for example, when the image is displayed in the display mode of the normal mode shown in FIG. 5A, the character image is displayed by horizontal scrolling in the non-image area M1. The control system 80 forms signals and supplies them to the controller 78.

The controller 78 receives a signal WD indicating the actual position of the non-image area from the display mode processing section 66 described above.
2 and the horizontal and vertical synchronizing signals H and V output from the switching circuit 72 are supplied. Then, the controller 78
Is a control signal for displaying a character image from the control system 80,
When supplied to this, a read control signal is supplied to the character image processing unit 74 to read the video of the character image data to be displayed on the screen from the RAM 75.

In this example, since the character image is displayed by scrolling in the horizontal direction, the video RAM 7
From 5, the character image data is read out as described above and written in the display memory 79 of the character image display control circuit 76.

The character image data written in the display memory 77 is read by the control signal from the controller 78. At this time, the controller 78 synchronizes with the horizontal and vertical synchronization signals H and V, and controls so as to display a character image in the section of the non-image part indicated by the signal WD2.

The character image read from the display memory 77 is converted into a video signal in the character image display control circuit 76 and supplied to the video synthesizing circuit 67.

In the video synthesizing circuit 67, the character image display control circuit 7 responds to the video signal from the display mode processing unit 66.
The video signals for displaying the character image from 6 are combined in the non-image section. The combined video signal is a CRT
It is supplied to the display 69 via the driver. Then, as shown in FIG.
An image of the TSC system is displayed, and a character image is displayed in the horizontal scroll mode on the non-image area M1.

In the case of this example, the non-image areas M1 and M
Both of the two may be used to control to display the character image.

Also in the display modes of FIGS. 5B and 5C, the character image is displayed in the same manner as in the case of FIG. 5A, but in the case of FIG. , In the non-image area Ma, as shown in FIG.
In the case of (C), the character image is controlled to be displayed in the non-image area Mb. In both cases of FIGS. 5B and 5C, the character image is controlled by scrolling in the horizontal direction.

In the display modes of FIGS. 5B and 5C, since the areas of the non-image areas Ma and Mb are relatively large, the areas Ma and Mb are not scrolled but fixed to one screen. The minute character image can be displayed.

That is, in the display modes shown in FIGS. 5B and 5C, when a character fixed display button provided on the remote controller is operated, the areas Ma and Mb are changed to three areas having an aspect ratio of 4/3. It can be divided, and a character image for one screen can be displayed in one of the divided areas.

For example, if the character fixed display button is operated in the display mode of FIG. 5B, the non-image area Ma has three aspect ratios of 4/3 as shown in FIG. 5D. It is divided into non-image area Mc, Md, Me. And
When one of them, for example, the area Mc is selected by the remote control operation of the user, a character image for one screen is compressed and displayed in this area Mc in this area Mc.

Further, in the case of the display mode shown in FIG. 6A, when the character image is displayed, it is displayed in the non-image area M4 by scrolling in the vertical direction of the screen.

That is, for example, the non-image portion M of FIG.
When a character image is displayed by scrolling from the lower side of the screen to the upper side of 4, the character image portion to be displayed is displayed from the video RAM 75 in which the character image for one screen is written as described above. , Are read line by line in the horizontal direction of the screen and written in the display memory 77.

Then, a video signal is formed based on the contents stored in the display memory 77 and supplied to the video synthesizing circuit 67.
As a result, the character image is displayed in the non-image portion M4 of FIG. 6A by scrolling the screen in the vertical direction.

Similarly, also in FIGS. 6B and 6C, the character image is displayed in a scrolling manner in the vertical direction of the screen, but in the case of FIG. 6B, in the non-image area MA, Figure 6
In the case of (C), a character image is displayed on the non-image area MB.

Next, the operation of the control system 80 when displaying a character image in the television receiver of this example will be described. FIG. 7 is a flow chart for explaining the operation of the control system 80.

The CPU 82 of the control system 80 constantly monitors whether or not a remote control signal indicating a character image display request is supplied from the remote control commander 91 (step 10).
1). Then, when it is detected that the character image display request is generated, the CPU 82 determines whether or not the current display mode is a display mode having a non-image portion (step 102).

If it is determined in step 102 that the mode does not have a non-image area, the screen is switched and the character image is displayed (step 104). When it is determined in step 102 that the mode has the non-image portion, the position of the non-image portion is recognized (step 10).
3).

Next, from the position of the non-picture area, etc., the control system 80
Determines whether to scroll horizontally or vertically with respect to the screen (step 10).
5).

In the process of step 105, when it is determined that the scroll is performed in the horizontal direction, the character image is displayed on the non-image portion in the horizontal scroll mode (step 106).

In the processing of step 105, when it is determined that the vertical scroll is to be executed, the character image is displayed on the non-image portion in the vertical scroll mode (step 107).

In this way, the character image can be displayed in the non-image portion by horizontal or vertical scrolling.

It is also possible to allow the user to arbitrarily change the horizontal or vertical scrolling.

It is also possible to allow the user to set the number of display lines, the number of digits, the scroll speed, etc. of the character image.

In both the first and second embodiments, the key operation parts 43 and 83 are the remote control commanders 51 and 91. However, instead of the remote control commanders 51 and 91, the key operation parts 43 and 83 are operated. May be.

As described above, by displaying the character image in the non-image part generated when the 4/3 image is displayed on the screen having the aspect ratio of 16: 9, the image of the television program and the image of the character image are displayed. You can watch at the same time. In addition, since the character image is displayed in the non-image portion that does not overlap the image of the TV program, the images of the two do not overlap, and the image of the TV program can be displayed without omission.

[0120]

As described above, according to the television receiver of the present invention, the area for displaying the character image is provided, and the character image is displayed only in this area. And the text image of the teletext can be viewed at the same time.

Further, the video of the television program and the character image do not overlap with each other, and both can be viewed separately.

Further, in the case of a so-called wide television having a screen with an aspect ratio of 16: 9 which has a display mode for displaying an image of a television broadcast program in a mode having the non-picture portion, the non-picture portion is Since the area for displaying the character image of the character broadcasting program is displayed, the character image can be displayed without completely compromising the image of the television broadcasting program.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a television receiver according to the present invention.

FIG. 2 is a diagram for explaining horizontal scroll display of character images in an embodiment of the television receiver according to the present invention.

FIG. 3 is a diagram for explaining vertical scroll display of character images in an embodiment of the television receiver according to the present invention.

FIG. 4 is a block diagram of a second embodiment of the television receiver according to the present invention.

FIG. 5 is a diagram for explaining a display mode in a normal mode of a second embodiment of the television receiver according to the present invention.

FIG. 6 is a diagram for explaining a display mode in a two-screen mode of a second embodiment of the television receiver according to the present invention.

FIG. 7 is a flow chart for explaining the operation of the second embodiment of the television receiver according to the present invention.

[Explanation of symbols]

 11 Tuner Section 12 Audio Processing Section 13 Amplifying Circuit 14 Speaker 15 Video Processing Section 16 Video Compositing Circuit 17 RGB Driver 18 Display 19 Sync Separation Circuit 21 Character Data Extraction Circuit 22 Character Image Processing Section 23 Video RAM 31 Character Image Display Control Circuit 32 Display Memory 33 Controller 34 Clock Generator 30 Display Area Forming Circuit 40 CPU 41 Program ROM 42 RAM 51 Remote Commander

Claims (5)

[Claims] 1. An image display unit for displaying an image of a television broadcast program, a display request generation unit for generating a display request for a character image of a character broadcast program, and the character image on a part of the screen of the image display unit. A character image display area forming means for forming an area signal indicating a character image display area for displaying, character data decoding means for extracting and decoding character data superimposed on the video signal, and the character data decoding means. Based on the data of
A means for forming character image data for displaying a character image and storing it in the character image memory, and a means for storing the character image data for each character image display area when the character image display request is made. And a character image display control unit for displaying the character image in a scrolling manner in the character image display area on the screen. 2. A display mode having a non-image portion in which an image of a television broadcast program is not displayed on a part of the screen of the image display means, and the character image display area forming means includes characters in the non-image portion. The television receiver according to claim 1, wherein the image display area is formed. 3. The image display means has an aspect ratio of 16:
A television receiver having a screen of 9 and having a display mode for displaying an image having an aspect ratio of 4: 3 by forming a non-image part on a part of the screen, wherein the aspect ratio is 4: It occurs when the image of 3 is displayed,
The television receiver according to claim 2, wherein the character image display area is formed in the non-image portion. 4. The television according to claim 1, 2 or 3, wherein the character image display control means controls to scroll the character image in a horizontal direction of a screen of the image display means. Receiving machine. 5. The television according to claim 1, 2 or 3, wherein the character image display control means controls to scroll the character image in a vertical direction of a screen of the image display means. Receiving machine.