JPH06205321A - Teletext information retrieval method - Google Patents

Abstract

(57) [Summary] [Purpose] If the update code is input, the text program with the same update code is displayed on the program guide screen. [Structure] From a composite video signal received and demodulated by a tuner unit 1, a character broadcast signal is extracted and fetched by a character fetching unit 2 and recorded in a memory unit 3 via a control unit 9. The update code identifying unit 6 through the control unit identifies the update code assigned to each text program read from the memory unit,
Input to the determination unit 8 via the control unit. When the update code is input from the input unit 7, this data is input to the discriminating unit via the control unit and compared with the data from the update code discriminating unit to discriminate the matching program number. Based on the signal from the discriminating section, the data of the corresponding program number is read from the memory section through the control section, and the decoding section 4 decodes the data into the required character signal.
It is displayed on the screen by the display unit 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for retrieving information on teletext, and more particularly to a method for displaying the time when information is updated to make it easier to retrieve the latest information.

[0002]

2. Description of the Related Art Generally, when receiving a teletext program, first, the channel on which the text program to be received is broadcast is selected, and then the program number is selected by using a numeric keypad or the like. . However, there are about 400 programs that are broadcasted in many areas in the teletext, and among them, there are similar channels such as "stock market", "news", and "weather forecast". There are many broadcasting programs of the contents. Therefore, a "genre key" is provided for the convenience of viewers. For example, if you press the "stock market" genre key, you can press the A channel stock market condition, and if you press the "News" genre key, the B channel news,
There is a device in which a channel selection and a program number of a teletext can be selected with a single key operation, such as receiving the weather forecast of channel C by pressing the "weather forecast" genre key. That is, the setting can be made according to the taste of the viewer.

[0003]

[Problems to be Solved by the Invention] In teletext programs, information contents are updated at relatively short time intervals, such as stock market conditions or odds information, and daily information such as news or weather forecasts. There are things that are regularly updated at fixed times, and there are things that are repeatedly broadcast daily, such as vacation information or road construction schedules, for a week or days later. In the teletext, the teletext programs whose information update timings are different are broadcast without being classified. In view of such a point, the present invention is to provide a code of update time for each program number, and to provide a code for facilitating information retrieval by using this code.

[0004]

In order to solve the above problems, the present invention provides a tuner section for receiving a television broadcast and demodulating it into a composite video signal, and a character broadcasting signal from the composite video signal demodulated by the tuner section. A character capturing section for capturing the data, a memory section for recording the data from the character capturing section, a decoding section for decoding the character broadcast signal read out from the memory section into a display signal, and a signal from the decoding section is displayed. A display section, an update code identifying section for identifying an update code added to a text program by the data read from the memory section, an input section for inputting an update code, etc., and the update code identifying section for identifying the data from the input section. A discriminator for comparing a program number having a matching update code with the data from the unit, the tuner unit, the character capturing unit, the memory unit, the decoding unit, the display unit, the update code identifying unit and the discriminating unit. And a control unit for reading the data of the program number discriminated by the discriminating unit from the memory unit, decoding it by the decoding unit and displaying it on the display unit. Is.

[0005]

With the above-described configuration, in the teletext information retrieval system according to the present invention, for example, "current information", which indicates that updating is performed at short time intervals, is updated at a fixed time every day. "Progress information" that represents what is done,
Alternatively, if you enter a code that is set according to the time of information update, such as "future information" that indicates that information that is several days ahead is repeatedly broadcast every day, the program number corresponding to the input code will be stored in the memory section. Search from the teletext program recorded in
The decoding unit decodes the signal for display and displays it on the screen of the receiver via the display unit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a teletext information retrieval system according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a main part of an embodiment of an information retrieval system for teletext according to the present invention. In the figure, reference numeral 1 denotes a tuner section that receives a television broadcast, demodulates it into a composite video signal, and outputs it. A character capturing unit 2 extracts and captures a character broadcast signal superimposed on the composite video signal from the tuner unit 1.
Reference numeral 3 is a memory unit for recording the character broadcast signal from the character capturing unit 2 for each program number. A decoding unit 4 decodes the teletext signal read from the memory unit 3 into a required text signal. A display unit 5 displays the character signal from the decoding unit 4 on the screen. An update code identification unit 6 identifies the update code assigned to each program from the teletext signal recorded in the memory unit 3. Reference numeral 7 denotes an input unit for inputting update codes such as "current information", "progress information", or "future information" set for each update time. 8 is a discrimination unit,
The data from the update code identifying unit 6 is compared with the update code input from the input unit 7 to determine the matching data. A control unit 9 controls each unit.

FIG. 2 is a block diagram of the essential parts of another embodiment of the information retrieval system for teletext according to the present invention. In the figure,
Since the reference numerals 1 to 9 are the same as those in FIG. 1, description thereof is omitted. Reference numeral 11 is an update code setting section, for example, referring to the text program displayed on the display section 5, for example, "current information",
Update codes such as "progress information" or "future information" are set for each program number. A storage unit 12 stores the data from the update code setting unit 11 for each program number for each channel in which teletext is being broadcast.

Next, the operation of the information retrieval system for teletext according to the present invention will be described. First, in the case of FIG. 1, the update code is added to each teletext program and broadcasted, and the program number to which the corresponding update code is added is identified according to the designation of the receiver. . In this case, the update code is
For example, as shown in FIG. 3A, it is transmitted as a part of the information displayed in the header sentence display area 21 at the top of the screen, or as shown in FIG. For example, it is sent as information, or sent using information other than magazine number "0" (currently rarely used).

From the composite video signal received and demodulated by the tuner unit 1, a character broadcasting unit 2 extracts and fetches a character broadcasting signal and records it in the memory unit 3 via the control unit 9 for each program number. Search for teletext programs is performed as follows.
That is, "current information" according to the type of information to be searched,
A key such as "progress information" or "future information" is operated. For example, when the “current information” key is pressed, this operation causes the input unit 7 to input the “current information” signal to the determination unit 8 via the control unit 9. In response to this input, the update code identified by the update code identifying section 6 is input to the determining section 8,
The update code that matches the signal from the input unit 7 is determined. Based on the signal from the discriminating unit 8, the program number data to which the update code is added is read from the data recorded in the memory unit 3 via the control unit 9, and the decoding unit 4 decodes the required character. The signal is decoded and displayed on the screen by the display unit 5.

In the case of FIG. 2, the update code is set by the update code setting section 11 by the receiver for each teletext program. The data from the update code setting unit 11 is input to the storage unit 12 via the control unit 9 and registered for each program number. For each teletext program, this update code is divided into, for example, “current information”, “progress information”, “future information”, etc., as in the case of FIG. 1, and is set for each program number.

Then, the update code input from the input unit 7 by a required operation is input to the determination unit 8 via the control unit 9 and compared with the data read from the storage unit 12 to give a matching update code. Determine the program number you are viewing. Based on the signal from the discriminating unit 8, the data of the program number is read from the memory unit 3 via the control unit 9, the decoding unit 4 decodes it into a desired character signal, and the display unit 5 displays it on the screen. . The other operations are the same as in the case of FIG.

[0012]

As described above, according to the teletext information retrieval system of the present invention, each teletext program is provided with an update code indicating the time of updating the information. If you specify an update code according to the type of text program, the text guide program with the same update code will be displayed on the program guide screen, so you can search for the target text program from this. As described above, it is effective to save the trouble of skipping a large number of program numbers unrelated to the search target.

[Brief description of drawings]

FIG. 1 is a block diagram of an essential part of an embodiment of an information retrieval system for teletext according to the present invention.

FIG. 2 is a block diagram of a main part of another embodiment of the information search system for teletext according to the present invention.

FIG. 3 is a display example of update codes according to the information search system for teletext according to the present invention.

[Explanation of symbols]

 1 Tuner part 2 Character capture part 3 Memory part 4 Decoding part 5 Display part 6 Update code identification part 7 Input part 8 Discrimination part 9 Control part 11 Update code setting part 12 Storage part

Claims (2)

[Claims] 1. A tuner section for receiving a television broadcast and demodulating into a composite video signal, and a character capturing section for capturing a character broadcast signal from the composite video signal demodulated by the tuner section.
A memory unit for recording data from the character capturing unit, a decoding unit for decoding the character broadcasting signal read from the memory unit into a display signal, a display unit for displaying the signal from the decoding unit, and the memory unit. An update code identifying section for identifying the update code assigned to the text program by the read data, an input section for inputting the update code, etc., and updating by comparing the data from the input section with the data from the update code identifying section. The discriminating unit discriminating between program numbers having the same code and the tuner unit, the character capturing unit, the memory unit, the decoding unit, the display unit, the update code discriminating unit and the discriminating unit are constituted by the discriminating unit. An information retrieval system for teletext in which the data of the program number determined in step 1 is read out from the memory part, decoded by the decoding part and displayed on the display part. 2. A composite video signal for receiving a television broadcast.
Tuner section that demodulates to
A character capture unit that captures a teletext signal from the combined video signal,
A memory unit that records data from the character capture unit, and a memory
Decoding the teletext signal read from the unit into a signal for display
Display that displays the decoding section and the signal from the decoding section.
Section and an update code setting section that sets an update code for each program number
And the data from the update code setting section for each broadcast channel
Input the update code etc. and the storage section that stores each program number
Reads data from the input unit and the input unit from the storage unit
Determine the program number with the same update code by comparing with the recorded data
Discriminating section, the tuner section, the character capturing section, the memory
Section, decoding section, display section, update code setting section, storage section and
And the control unit that controls the discrimination unit, and the discrimination unit discriminates
The data of the selected program number is read from the memory and
Characters decrypted in the code section and displayed on the display section
Broadcast information retrieval method.