JPH07131731A - Television receiver - Google Patents

Abstract

PURPOSE:To display entirely a signal without loss of teletext information even in the magnification state of a picture. CONSTITUTION:A signal from an antenna 1 is fed to a video image intermediate frequency circuit 3 through a tuner-section 2 of a television receiver and a control signal from a microcomputer 4 is fed to the circuit 3 to receive a desired broadcast signal. The signal from the video intermediate frequency circuit 3 is fed to a speaker 7 and a picture tube 8 through an audio process circuit 5 and a video process circuit 6 respectively. Furthermore, the control signal from the microcomputer 4 is fed to the process circuits 5,6, in which processing such as picture magnification is executed, Moreover, a signal from the video intermediate frequency circuit 3 is fed to a hardware section 41 of the microcomputer 4 to extract teletext information. Then a display signal processed by an internal software 42 is outputted from a hardware section 43 for tube screen display control and the display signal is fed to the video process circuit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver capable of demodulating and displaying teletext information and displaying an enlarged image.

[0002]

2. Description of the Related Art For example, information (teletext information) forming an arbitrary character string or the like is transmitted to a region outside a valid screen of a television signal. Particularly in the United States, caption information (closed captions) for the deaf has been legalized, and transmission of teletext information including such caption information has come to be carried out in most broadcasts.

On the other hand, a television receiver having a function of enlarging and displaying an image by a television signal has been implemented. That is, the enlargement of the image is performed for the purpose of paying attention to a part of the image and making the characters in the image easy to read. Therefore, such image enlargement is generally performed by increasing the amplitude of the vertical and horizontal deflection signals.

This is a standard 4: 3 for a receiver having a display screen with an aspect ratio of 16: 9 in consideration of HDTV.
When displaying an image with an aspect ratio of
As shown in Fig. 5, the vertical of the image is aligned with the vertical of the display screen (solid line) and the non-display portions are provided on both sides of the image (chain line), while the horizontal of the image is displayed as shown in B of the same figure. The image (chain line) is enlarged so that it is aligned with the horizontal of the screen (solid line) and the upper and lower parts protrude.

[0005]

However, when the image is enlarged in this way, there is a risk that the above-mentioned display of the teletext information will protrude from the screen and a part of the information will be lost.

That is, when the teletext information is displayed, the above-mentioned caption information (closed caption) is superimposed and displayed on the image of the television signal. Moreover, even information other than subtitles can be displayed satisfactorily and stably by superimposing and displaying the information on the image of the television signal. Therefore, the display of the teletext information is generally performed by superimposing it on the image of the television signal.

Therefore, when the above-mentioned image is enlarged, the display of the teletext information superimposed and displayed on this image is also enlarged. Therefore, for example, when the teletext information is displayed as indicated by the diagonal lines in the image of FIG. 6A described above, the display becomes as indicated by the diagonal lines in B of FIG. There was a risk that the information display would go off the screen and be partially cut off.

That is, when the teletext information is displayed at the center of the upper and lower sides, the protrusion from the display screen as shown in FIG.
It is about 5%. However, if this is displayed with the bottom edge and top edge aligned with the screen, it will be about 15%,
As shown in C of the same figure, for example, of the 16 lines of teletext information displayed, about 3 lines may be out of the screen.

That is, the problem to be solved by the present invention is that, when the image of the television signal is enlarged, the display of the teletext information superimposed and displayed on this image overflows the screen, There is a risk that some parts will be missing.

[0010]

The first means according to the present invention is means for demodulating teletext information sent together with a television signal (video intermediate frequency circuit 3) (hardware part 41 of the microcomputer 4). And means for superimposing the demodulated teletext information on the image by the television signal (hardware section 43), and the image on which the teletext information is superposed as it is or enlarged from the display screen (picture tube 8). In a television receiver having means for displaying as a result (video processing circuit 6),
A television receiver provided with means (software 42) for causing all or part of the teletext information to be contained in the display screen when the image is enlarged and displayed. is there.

According to a second aspect of the present invention, in the television receiver described in the first aspect, the television is characterized in that all of the teletext information is moved so as to be contained in the display screen. It is a John receiver.

A third means according to the present invention is the television receiver according to the first means, characterized in that a part of the teletext information is sequentially contained in the display screen. It is a John receiver.

According to a fourth aspect of the present invention, in the television receiver described in the first, second or third aspect, the display screen has an aspect ratio of 16: 9. It is a machine.

[0014]

According to this, by providing the means for fitting all or part of the teletext information on the display screen, it is possible to display all the teletext information without fail even when the image is enlarged. .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a signal from an antenna 1 is supplied to a video intermediate frequency circuit 3 through a tuner section 2 of a television receiver. A control signal from the microcomputer 4 is supplied to the tuner unit 2 and the video intermediate frequency circuit 3 to receive a desired broadcast signal. Further, the signal from the video intermediate frequency circuit 3 is supplied to the speaker 7 and the picture tube 8 through the audio process circuit 5 and the video process circuit 6, respectively. Also microcomputer 4
The control signal from is supplied to the process circuits 5 and 6,
Processing such as image enlargement is performed.

The signal from the video intermediate frequency circuit 3 is also supplied to the microcomputer 4. In this embodiment, the case where the microcomputer 4 has built-in hardware and software for processing teletext information will be described. In this case, the signal from the video intermediate frequency circuit 3 is supplied to the hardware section 41 of the microcomputer 4 for taking out the teletext information. Then, the display signal processed by the internal software 42 is output from the hardware portion 43 for controlling the display on the tube surface, and this display signal is supplied to the video process circuit 6.

In this device, for example, in FIG.
When enlarging the image of the display of the teletext information as shown in (1), this display (diagonal line) is divided into two, and each divided portion is sequentially displayed. That is, for example, the display of the teletext information is divided at the position of the broken line, and the upper part from the broken line is accommodated in the display screen in accordance with the position where the enlarged image is displayed. To display. The remaining divided teletext information is switched and displayed after a predetermined time or scrolled from the first display.

When the display format is scroll (up-roll) in displaying such teletext information, the divided lower part is placed at the position where the enlarged image is displayed as described above. It is also displayed so that it fits on the display screen. In this case, if only the upper part is displayed, the display that is up-rolled from the lower side remains blank until the upper part reaches the upper part, which is unnatural. On the other hand, by displaying only the lower part, the display does not become blank, and all teletext information is scroll-displayed.

Further, FIG. 3 shows a flowchart of the software 42 for these processes. In this figure, when the display of teletext information is started, it is first determined in step [1] whether or not the image is enlarged. If it is not enlarged, normal processing is performed in step [2].

On the other hand, when the image is enlarged in step [1], the display of the teletext information is divided in step [3], the display position of the image is determined in step [4], and the step [[ The display position of the teletext information divided in 5] is set. The display position can be set, for example, by changing the horizontal scanning line number at the display start position.

Further, in step [6], it is determined whether or not the display format of the teletext information is scrolling. If not, the switching display or scroll display of the upper and lower parts of the teletext information divided in step [7] is performed. Done. When scrolling in step [6], the lower part of the teletext information divided in step [8] is displayed.

And step

In [9], it is determined whether or not the display of the teletext information has been completed. If not completed, the process returns to step [1]. Again step

When the display of teletext information is completed in [9],
The process is ended.

Thus, according to the above-mentioned apparatus, a means for containing all or part of the teletext information on the display screen (software 4 of the microcomputer 4).
By providing 2), it is possible to display all teletext information without fail even when the image is enlarged.

Further, in the above-mentioned apparatus, when the teletext information is not displayed on the entire screen as shown in FIG. 4A, for example, when this image is enlarged, it is also shown in B in FIG. As you can see, a part of the display overflows. Therefore, in this case, by moving the display position of the teletext information, for example, downward, as shown in C of the same figure, all the information can be displayed without fail.

Therefore, in such a case, for example, in the flowchart of the software 42, when the enlargement of the image is judged in the step [1] as shown in FIG. 5, the judgment of the display position of the image in the step [4] is carried out. Then, in step [5], only the display position of the teletext information is set. By this, similarly to the above, all the teletext information can be displayed without fail even when the image is enlarged.

[0026]

According to the present invention, by providing means for fitting all or part of teletext information in the display screen, all teletext information is displayed without fail even when the image is enlarged. I was able to do it.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an example of a television receiver according to the present invention.

FIG. 2 is a diagram showing a screen display for explaining an example of processing.

FIG. 3 is a flow chart diagram for explaining that.

FIG. 4 is a diagram showing a screen display for explaining another example of processing.

FIG. 5 is a flow chart diagram for explaining the explanation.

FIG. 6 is a diagram showing a screen display for the conventional description.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 antenna 2 tuner section of television receiver 3 video intermediate frequency circuit 4 microcomputer 41 hardware section for extracting teletext information 42 software 43 hardware section for controlling screen display 5 audio process circuit 6 video process circuit 7 speaker 8 Picture tube

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H04N 7/03 7/035

Claims (4)

[Claims] 1. A means for demodulating teletext information transmitted together with a television signal, a means for superimposing the demodulated teletext information on an image formed by the television signal, and a means for superimposing the teletext information. In a television receiver having means for displaying an image as it is or by enlarging it from the display screen, when enlarging and displaying the image, all or part of the teletext information is displayed in the display screen. A television receiver characterized in that it is provided with a means for allowing it to be housed in. 2. The television receiver according to claim 1, wherein all the teletext information is moved so as to be stored in the display screen. 3. The television receiver according to claim 1, wherein a part of the teletext information is sequentially contained in the display screen. 4. The television receiver according to claim 1, 2 or 3, wherein the display screen has an aspect ratio of 16: 9.