JP3083652B2 - Teletext transmission and reception device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a text broadcast transmitting and receiving apparatus for superimposing program data consisting of characters, graphics, additional sounds, etc. during a vertical blanking period, and more particularly to preparing detailed data in a broadcasting station. Of the program data obtained, the detailed data of the program data required by the operator can be easily accessed to the broadcasting station, and the text broadcasting can be obtained through a wired facsimile terminal or other communication means such as facsimile broadcasting. It relates to a transmitting and receiving device.

[0002]

2. Description of the Related Art In a teletext system, teletext data is transmitted in a data packet format with a unit length of data superimposed in a predetermined horizontal scanning period within a vertical blanking period of a television signal. You. The teletext data includes not only text information but also information data such as figures and additional sounds. These data are collectively referred to as program data.

FIG. 8 shows the configuration of a conventional example on the transmission side in such a teletext system. In a broadcasting station, a teletext program data is mixed with a normal television signal by a mixer 1 and modulated by an RF modulator 2,
The signal is transmitted from the antenna 3.

FIG. 9 shows a configuration of a receiving side for receiving a television signal on which teletext program data transmitted from the transmitting side shown in FIG. 8 is superimposed. Is selected by the tuner 5 and then guided to an IF detection circuit 6, where the video signal and the audio signal are extracted. The teletext data is decoded by a teletext decoder 7 and mixed with a video signal by a mixer 8 and an audio signal by a mixer 11.
The video signal mixed by the mixer 8 is displayed on a monitor 9, and the audio signal mixed by the mixer 11 is output from a speaker SP.

FIG. 10 is a block diagram of a conventional example of a teletext receiver in a teletext system. The video signal detected by the tuner (not shown) is input to the capturing unit 10. The capturing unit 10 extracts program data from a video signal and performs error correction. The program data is stored in the memory 12 together with the program number in units of programs.
To reproduce the program data stored in the memory 12, the operator inputs a program number to be reproduced by key operation.
This program number is input to a central processing unit (CPU) 16 via an interface (I / F) 14.

The CPU 16 reads out from the memory 12 program data corresponding to an input program number input via the interface 14 by key operation. If the read program data is character information and graphic information, the program data is output as video signals (R, G, B, Y) via the display control unit 13. If the read program data is an additional sound,
The signal is output as a sound signal via the music synthesizer circuit 20. The CGROM (character memory) 22
The character shape (font) corresponding to the character information is stored, and is used when converting the character information into a video signal.

[0007]

SUMMARY OF THE INVENTION In a teletext receiving apparatus, 1
The number of characters that can be displayed on a page is about 120 characters, and the number of pixels is as small as 248 dots (H) × 204 lines (V). With this level of display capability, it is possible to display simple headings and contents, but there is a problem that detailed contents cannot be extracted. The present invention has been made in view of the above problems, and has made it possible to easily access another communication means.
An object is to enable easy acquisition of detailed data.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention superimposes program data consisting of characters, figures, additional sounds, etc. during a vertical blanking period of a television signal, and superimposes the program data. In a teletext transmission apparatus for transmitting a television signal, the multiplexing unit multiplexes, together with the program data, data indicating a location where a viewer can access the details of the program data to take out the details through another communication means, together with the program data. Means to allow the viewer to
If there is access, the detailed data will be
I try to send.

A television signal in which program data composed of characters, graphics, additional sound, etc., and data indicating a storage location where detailed data of the program data are stored during a vertical blanking period of the television signal is superimposed. In the teletext receiving apparatus for receiving and reproducing the broadcast data, the memory means for separating and extracting the program data superimposed on the television signal and the data indicating the storage location of the detailed data from the television signal and storing the data from the outside. Based on the instruction, necessary data is extracted from the data stored in the memory means, and based on the extracted data, the storage location of the detailed data is accessed via another communication means. , And a detailed data obtaining means for obtaining the detailed data.

[0010]

According to the above arrangement, on the transmitting side, the program data is superimposed on the television signal and transmitted. When extracting the detailed data of the program data, the data necessary for accessing the television signal is added to the television signal. It is superimposed and transmitted. And the viewer has said access
And the detailed data via other means such as facsimile
To send .

When the receiving side receives a television signal for teletext in which program data and detailed data of the program data are superimposed upon receiving the data necessary for access, both of these data are transmitted to the television. The data is separated and extracted from the John signal and written into the memory means. When the detailed data is required, when the program data requiring the detailed data is designated from the outside, the designated program data and the data indicating the storage location of the detailed data are read from the memory means. When data indicating the storage location of the detailed data is input, the detailed data can be obtained via another communication means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 5 is a diagram showing a logical form in a display area of teletext. The foremost pattern surface 40 is for writing characters and graphics with a character or dot signal of "0" or "1" sent from the transmitting side to make the pattern surface of that portion opaque. The foreground surface 41 and the background surface 42 on the back side are controlled. For “0”, the foreground color (red) is set, and for “1”, the background color (blue) is set.

The display control surface 43 is a surface for controlling flashing (blinking) or concealment (hidden characters) in teletext. The concealment is used when concealing characters with a quiz or the like. Can be visible. The raster surface 44 is a surface for controlling the color of the entire display screen to a specific color such as red, blue, and green, and the television surface 45 is a surface for displaying a normal image. Each of the pattern surface 40, the foreground surface 41, the background surface 42, the display control surface 43, and the raster surface 44 becomes transparent when a television image is displayed.

According to the present invention, when program data is transmitted from the transmission side, the foreground color and the background color are set to be the same at the beginning of the transmission of the program data. A telephone number and a page number indicating the storage location of the data are transmitted as codes. In this case, a receiver that does not support the present invention is not presented because the foreground and background colors are the same.

FIG. 1 is a block diagram of a teletext transmission apparatus according to the present invention. Parts corresponding to the conventional example described in FIG. In teletext,
If there is additional detailed data in the program data to be transmitted superimposed during the vertical blanking period of the television signal, a video signal with a mark ("FAX") as shown in FIG. At the same time, the request destination (telephone number) of the detailed data is superimposed on the image data and transmitted. When a viewer requests detailed data via a telephone line or the like, the modem 23 transmits the program data designated by the viewer, the request destination (telephone number) of the detailed data, and the data such as the viewer's telephone number to a personal computer. 28, where the identification data is identified and the storage location of the detailed data is accessed, and the detailed data is transmitted to the requester.

In this case, the detailed data is a facsimile 26
Alternatively, the data may be transmitted to the requester via the telephone line 24 via the modem 23, or may be converted into a facsimile broadcast format and then superimposed on the audio signal of the television signal and transmitted.

FIG. 2 is a block diagram of a teletext receiving apparatus according to the present invention. 2, portions corresponding to those of the conventional example described with reference to FIG. 10 are denoted by the same reference numerals, and description thereof is omitted. In FIG. 2, data of a request destination (telephone number) for requesting the detailed data of the program data by the transmitting device is superimposed on the video signal transmitted from the transmitting side. The program is fetched and stored in the memory 12 together with the program data and the page number.

When the viewer needs detailed data,
When the user presses the "FAX" key provided on the teletext receiver and specifies the required program data with the key, the memory 1
The request destination (telephone number), program data, and page number of the necessary detailed data stored in 2 are read out, and the read out data and the telephone number of the already registered viewer are transmitted via the modem 23. Send and request detailed data. To register your phone number, set the phone number registration mode.
The screen shown in FIG. 7 is obtained, and the input is performed by inputting according to the instruction of the cursor displayed on the screen. The detailed data requested as described above is delivered to the requesting viewer via facsimile or facsimile broadcasting as described in the teletext transmission apparatus shown in FIG.

FIG. 3 shows a decoding flow of the present invention. Each step of the decoding flow in FIG.
Controlled by U16. First, in step 31, foreground color = background color (special mode data?) Is checked, and "NO"
If so, jump to the normal routine. When the foreground color and the background color become the same and the mode of the present invention is set, the codes such as the program data, the telephone number of the destination of the request for the detailed data and the number of pages are read in step 32, and the codes are recognized in step 33. I do. Then, the above-described codes having been recognized are written in the memory 12 in the next step 34. Next step 3
In step 7, the end is checked. If the end is determined, the process returns to the normal mode. Otherwise, the process returns to step 31 to repeat the above steps.

FIG. 4 is a system diagram of a teletext receiving apparatus according to the present invention. 4, portions corresponding to those of the conventional example described with reference to FIG. 9 are denoted by the same reference numerals and description thereof is omitted. In FIG. 4, a received teletext television signal is selected by a tuner 52 and decoded by a teletext decoder 7 in the same manner as in the conventional example. In this case, the mark (“FA
X ") is displayed on the screen. When the viewer makes a request for detailed data in the manner described above, the detailed data is sent to the facsimile 26 via the telephone line 24. The data is converted into a facsimile broadcast format on the transmitting side and superimposed on the audio signal of the television signal and transmitted. The data is converted into a signal, and is received and reproduced by the facsimile 26 to obtain detailed data.

[0021]

Since the present invention has the above configuration, in a teletext system, detailed data which is difficult to be transmitted by being superimposed on a television signal is transmitted by facsimile broadcasting or other communication such as facsimile using a telephone line. It can be easily obtained through means, and the application field of teletext can be significantly expanded.

[Brief description of the drawings]

FIG. 1 is a system diagram of a teletext transmission device of the present invention.

FIG. 2 is a block diagram of a teletext receiving apparatus of the present invention.

FIG. 3 is a diagram showing a decoding flow of the present invention.

FIG. 4 is a system diagram of a teletext receiving apparatus according to the present invention.

FIG. 5 is a diagram showing a logical form of a display area for teletext.

FIG. 6 is a diagram showing a display example of a received image according to the present invention.

FIG. 7 is a diagram showing a display example of a telephone number registration screen according to the present invention.

FIG. 8 is a system diagram of a conventional example of a teletext transmission device.

FIG. 9 is a system diagram of a conventional example of a teletext receiving apparatus.

FIG. 10 is a block diagram of a conventional example of a teletext receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mixer 10 Capture part 12 Memory 16 CPU 23 Modem 24 Telephone line

Claims (2)

(57) [Claims] 1. A teletext transmission apparatus for superimposing program data consisting of characters, graphics, and additional sounds during a vertical blanking interval of a television signal and transmitting a television signal on which the program data is superimposed. the data that indicates where the data details viewers can access to retrieve via other communication means provided multiplexing means for multiplexing the television signal together with the program data, the accession the viewer
If there is access, the detailed data will be
A character broadcast transmission device in a detailed data transmission system adapted to transmit. 2. A television which superimposes program data composed of characters, graphics, additional sounds and the like and data indicating a storage location where detailed data of the program data is stored during a vertical blanking period of a television signal. In a teletext receiving apparatus that receives and reproduces a television signal, a memory unit that separates and stores program data superimposed on the television signal and data indicating a storage location of detailed data from the television signal, Based on an external instruction, necessary data is extracted from the data stored in the memory unit, and based on the extracted data, a storage location of the detailed data is accessed via another communication unit. A teletext receiving apparatus comprising: a detailed data obtaining means for obtaining the detailed data via a communication means.