JPH08307294A - Fm character multiplex broadcast receiver - Google Patents

Abstract

PURPOSE: To display a retrieved result onto a screen by providing a database, a keyword designation means and a control section displaying the retrieval result so as to retrieve the database while using the designated keyword as an index. CONSTITUTION: A stereo audio signal is selected by an FM tuner section 2 and demodulated and amplified by an FM radio section 3 and reproduced from a headphone 4 or left right speakers as a stereo or monaural audio signal. Multiplexed information multiplexed by an FM audio signal is fed to a decode section 5. The operation of the decode section 5 is totally controlled by a section 12 incorporating a CPU. An operation input section 7 and a display section 8 are connected to a control section 12 and the information selected by an input section 7 is displayed on the display section 8. A database storage section 13 and external connection interfaces 14, 15 are connected to the control section 12. Retrieved data are fed to an external connection device such as a printer 40 and an FD device 50 and extracted externally at any time. Furthermore, a character string desired to be designated by a keyword in the multiplex information displayed on the screen is designated by one by one character by using a cursor key arranged on a panel face as a keyword designation means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM text multiplex broadcasting receiver which allows a database to be searched by using multiple information being received as an index.

[0002]

2. Description of the Related Art In FM character multiplex broadcasting, in which characters and figures are multiplexed and broadcasted in ordinary FM broadcasting, coded characters and figures are frequency-multiplexed with a baseband signal by modulating a subcarrier frequency of 76 kHz. , FM-modulate this and broadcast. For digital modulation, LM that changes the multiplex information, that is, the multiplex level of characters and figures, according to the level of the audio signal.
SK (Level controlled Minim)
um Shift Keying) is used, and as the error correction code, a product code in which the (272,190) shortened difference set cyclic code is double used is used.

As is well known, DARK (Data Radi) can be said to be a standard system of FM multiplex broadcasting of a mobile reception system.
4) according to the ITU-R recommendation so that information related to stereo audio programs such as song titles and singer names, information such as news weather forecasts, and road traffic information can be broadcast simultaneously with stereo audio broadcasting.
The hierarchical structure shown in is defined. Also, this DARK
Of the four types of synchronization signals BIC (Block Unique) for identifying the position of the beginning or the break.
ation code), one frame is divided into 272 blocks. In each row of each block, BIC and error correction code CRC (Cyclic
176 bits (22 bytes) excluding Redundancy Check) and parity form the data packet shown in FIG.

The data packet shown in FIG. 5 is composed of a prefix and a data block, and the number of bits of the prefix is 32 bits (configuration 1) and 16 bits (configuration 2). The configuration 1 is used for transmitting general programs such as characters, figures, and traffic information, and the configuration 2 is used for transmitting relatively short additional information such as a broadcasting station name, a date, or a representative frequency.

As the broadcasting service, the following three service levels (levels 1, 2 and 3) are assumed according to the size and function of the information display device. Level 1 is a service for a receiver that can display a text (15 characters x 2 lines) and a header line. The information in characters is the center, and graphics are sent by using photo graphics. The specific service contents are the broadcasting station name,
The weather forecast, headline news, traffic information, etc. are considered, centering on complementary information of FM stereo broadcasting such as program titles, song titles, singer names, and request numbers being broadcast. Level 2 is a service for receivers that can display the text (15.5 characters x 8 lines) and header lines, and is suitable for sending map information, but as a display device. Since it is assumed to be a television receiver,
Receivers with only a simple display are not suitable for reception. Level 3 assumes a receiver equipped with a map display function using a CD-ROM, that is, a receiver for a car navigation system, instead of servicing ordinary characters and figures, and receives services for traffic information data. be able to.

The conventional FM teletext broadcasting receiver 1 shown in FIG. 6 is a baseband composite signal modulated by an FM broadcasting station.
That is, a signal in which the left and right stereo audio signals including the 19 kHz pilot signal and the LMSK modulated signal are combined is received, and separated into a stereo audio signal and a multiplex digital signal for demodulation. The stereo audio signal is selected by the FM tuner unit 2, demodulated and amplified by the FM radio unit 3, and reproduced as a stereo audio signal or a monaural audio signal from the headphones 4 or left and right speakers (not shown).

The multiplexing information multiplexed on the FM audio signal is F
It is sent to the M character multiplex broadcasting decoding unit 5, and the band-pass filter built in the decoding unit 5 causes about 100 kHz.
A DARK multiple signal centered at 76 kHz is extracted from the baseband composite signal having the z signal band. The extracted DARK multiplex signal is LMSK demodulated by the differential detection method in the LMSK demodulation circuit built in the decoding unit 5, and then the identification code [BIC] is checked to clarify the location of the data, and the beginning of the block is checked. While capturing and establishing block synchronization, the sequence change point of the block identification code designated in order is captured and used for establishing frame synchronization.

After the synchronization is established, the data is supplied to the PN decoding circuit built in the decoding unit 5, and the pseudo random signal (PN signal) is added to the multiple information in the packet following the block code.
Are superimposed and the multiplex information is decoded by PN decoding. The multiplex information thus reproduced in synchronization is finally decoded by the decoding unit 5.
It is supplied to an error correction circuit built in to receive the error correction processing. It should be noted that the mobile reception is considered here (27
2,190) A powerful error correction code called a shortened difference set cyclic code (BEST code) is used to enable error correction of about 11 bits in one block. Especially DAR
In the K method, error correction is performed by combining both error correction (horizontal correction) for each block (frame) and error correction (vertical correction) for each bit-wise set of each block in the vertical direction of the frame structure. A frame memory capable of storing frame data is used for correction.

Therefore, the value of the data after horizontal correction is 1
The blocks are immediately output every 18 ms, whereas the vertical correction data is time-division multiplexed with the horizontal correction data with a delay of about 5 seconds and then output. Generally, when the reception conditions are relatively good, multiple information can be output only by horizontal correction, but vertical correction is performed in an environment with severe reception conditions. There is a gap of several seconds between the display and. However, since a set of multiplex information is usually repeatedly broadcast for about 5 minutes, the display of the multiplex information is hardly harmed depending on whether the reception conditions are good or bad.

The operation of the decoding section 5 is centrally controlled by a control section 6 having a built-in CPU. Further, the control unit 6 is connected to an operation input unit 7 in which a plurality of input keys are arranged and a display unit 8 including a liquid crystal display unit, and the broadcasting selected by the key operation in the operation input unit 7 is connected. The multiplex information sent by the station is displayed on the display unit 8.

[0011]

The above-mentioned conventional FM text multiplex broadcast receiver 1 receives various information such as news, weather forecast, and road traffic information on air, and receives the information desired by the receiver at the time of switching on. It will be possible.
Some of this information, such as political news and economic news, reflects daily changes in the world affairs. It also contains a lot of information that cannot be understood without referring to the above.

However, when the conventional FM teletext receiver 1 receives multiple information including such terms that are not usually heard, difficult terms, technical terms, and latest buzzwords, these terms are received. It does not come with any function equivalent to a dictionary to help you understand exactly the meaning of, and unlike newspaper media, etc., it does not provide supplementary explanations such as footnotes. There was a danger that information would be spilled as it was.

An object of the present invention is to specify a keyword from multiple information displayed on the screen, search a database using this keyword as an index, and display the search result as data on the screen. It is what

[0014]

According to the present invention, an FM character multiplex broadcast is received and demodulated, and multiple information is displayed on a display unit.
In the M character multiplex broadcasting receiver, a database that can be searched based on a keyword and operated by a receiver,
Keyword searching means for specifying a part of the received multiplex information as a keyword, and searching the database with the keyword specified by the keyword specifying means as an index,
The object is achieved by providing an FM teletext broadcast receiver characterized by comprising a control unit for displaying a search result on the display unit.

Further, the present invention achieves the above object by providing the FM character multiplex broadcasting receiver characterized in that the keyword designating means comprises a cursor key for designating the received multiple information for each character. To do.

Furthermore, the present invention is an FM character multiplex broadcasting receiver which receives and demodulates FM character multiplex broadcasting and displays multiplex information on a display unit, and a database which can be searched based on a keyword and a received multiplex. Corresponding keyword portion in the character string displayed by the display unit when the database is searched using a part or all of the character string included in the information as a keyword and the database includes data with the keyword as an index The above object is achieved by providing an FM teletext broadcast receiver characterized by comprising a control section for highlighting.

Further, the control unit reads out corresponding data from the database and displays the corresponding data on the display unit only for a keyword for which disclosure is specified from the highlighted keywords. The above object is achieved by providing a broadcast receiver.

[0018]

The present invention provides a database that can be searched based on a keyword, and when the receiver specifies a part of the received multiplex information as a keyword, the keyword is used as an index to search the database and the search result is displayed. By displaying the information on the section, it is possible to promote multi-layered understanding of multiple information.
Further, the present invention searches a database using a part or all of a character string included in the received multiplex information as a keyword, and when the database includes data with the keyword as an index, the character string displayed by the display unit. By highlighting the corresponding keyword portion therein, it becomes possible to automatically associate the received multiple information with the database.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing an embodiment of the FM text multiplex broadcast receiver of the present invention, FIG. 2 is a view showing the appearance of the FM text multiplex broadcast receiver shown in FIG. 1, and FIG. 3 is based on keywords. It is a flowchart which shows the search procedure of a database.

FM teletext receiver 1 shown in FIGS.
1 is a database storage unit 1 connected to the control unit 12 by a bus
The database is stored in 3. In addition, the control unit 12
The external connection interfaces 14 and 15 are connected to the device, so that the multiplex information or the searched data retrieved from the database can be supplied to the externally connected device such as the printer 40 or the FD device 50 and can be taken out to the outside at any time. There is.

Further, in addition to the conventional power button 16, volume control button 17, numeral input key 18, and page feed key 19, a cursor key 20 for designating a keyword from the received multiple information and multiple information. A print button 21 for supplying and printing the searched data to the printer 40,
Alternatively, a transfer button 22 or the like for transferring the multiplex information or the searched data to the FD device 50 is arranged on the panel surface.
It should be noted that the cursor key 20 is used to select a character string to be specified as a keyword from the multiplex information displayed on the screen.
It is a keyword designating means used for designating keys character by character, and in the case of the embodiment, it adopts a configuration in which four direction keys for moving the cursor displayed on the screen left, right, up and down are arranged in a cross shape. By pressing any other button while pressing the key, it is possible to specify a character that is a keyword.

By the way, the keyword serving as an index when searching the database is designated by the receiver designating a part of the multiplex information in the state where the multiplex information is actually received. . Therefore, when the received multiple information includes a term that the receiver wants to know in detail, first, as shown in step (101) of FIG. 3, the display unit 8 is set to the multiple information display state, In the step (103) following the judgment step (102), the cursor key 20 is operated to move the cursor to the character at the position to be designated, and the character is designated character by character.

When the keyword is designated in this way, the control unit 12 executes a database search in the database storage unit 13 in step (104). When data corresponding to the keyword is found when the control unit 12 completes a series of searches, the determination step (10
In step (106) subsequent to 5), the control unit 12 performs highlighted display, such as black-and-white inverted display, hatched display, or underlined display, on the designated keyword so as to be visually distinguishable from other portions. Therefore, the recipient can judge that the data corresponding to the designated keyword exists by looking at the highlighted display on the screen.

Therefore, when it is desired to display the search result, in step (109) following the determination step (108), the cursor key 20 is operated to place the cursor on the highlighted keyword, and, for example, a predetermined specific Press the number input key 18. As a result, even if there are a plurality of designated keywords, the search result is displayed on the screen only for the desired keyword in step (110). If the data corresponding to the keyword is not found, "not applicable" is displayed on the display unit 8 as shown in step (111), and the search ends.

As described above, the FM teletext broadcast receiver 11 prepares a searchable database based on the keyword, and when the receiver designates a part of the received multiplex information as the keyword, it is designated. The database can be searched based on the keyword, and the search result can be displayed on the display unit 8. Therefore, it is possible to search the database by simply specifying a part of the received multiplex information, without the troublesome operation of key-inputting and specifying the character itself to be searched. Also. Various information related to the keyword included in the received character string is extracted from the database and displayed on the display unit 8. Therefore, while confirming the meaning of the keyword and its related information, the on-air multiple information Multi-layered understanding is possible.

Further, since the keyword designating means is constituted by the cursor key 20 for designating the received multiple information in character units, the cursor movably displayed on the screen of the display unit 8 is displayed on the multiple information by key operation. It is possible to specify the keyword very easily by specifying the part that becomes the keyword while moving with.

In the above embodiment, the cursor key 20
Was operated to specify a keyword on the screen, but the character string that constitutes the received multiplex information is segmented into words by character analysis techniques, etc., and a part or all of the segmented words is used as a keyword in the database. It is also possible to search. In that case, if it is found that the index corresponding to the keyword is included in the database, the keyword part corresponding to the index found to exist is highlighted so that it can be visually distinguished from other parts, for example, black and white reverse display or halftone dot By providing a hanging display or an underline display, it is possible to visually appeal to the user that the data stored in the database has relevant information. In this case, the database is automatically searched for the words included in the received character string forming the multiplex information without operating the cursor keys 20 to specify the keyword.
The burden on the user for searching the database will be considerably reduced.

In addition, the highlighted information attached to a part of the character string on the screen of the display unit 8 allows the user who knows that the relevant information exists in the database to be promptly presented with the relevant information to be known. Therefore, it is possible to configure so that the data corresponding to the designated keyword can be immediately read out from the database on the screen by merely pointing the cursor to the highlighted keyword, for example. In that case, even if the received multiple information contains many words and phrases that exist as an index in the database, the related information is read from the database only for the words and phrases specified on the screen, so the information you want to know may vary depending on the person. It is possible to appropriately meet various demands of a large number of users.

The FM multiplex broadcast receiver 11 shown in the embodiment can display not only the search result but also printing by the printer 40 connected via the external connection interface 14. That is, a dedicated printer 40 developed for the FM teletext broadcast receiver 11 or a printer 40 compatible with the external connection interface 14 is connected and the print button 21 is pressed to print the multiple information and the search result. it can. In this case, the multiplex information and the search result are obtained by the control unit 13
The printer 4 via the external connection interface 14
Sent to 0.

It is also possible to transfer the multiplex information to another recording medium for storage or processing. That is, if you want to save or process multiple information and search results,
Connect the FD device 50 to the external connection interface 15,
Press the transfer button 23. As a result, the control unit 13 outputs the multiplex information and the search result via the external connection interface 15.
Transfer to the D device 50. The multiple information and the search result transferred to the floppy disk in this way can be arbitrarily processed by a personal computer, a word processor or the like, and can be easily added to a database owned by an individual.

External connection interfaces 14 and 15
Is developed exclusively for the FM teletext receiver 11, as well as the Centronics parallel interface, RS232C serial interface or GP.
It goes without saying that the IB interface and the SCSI interface are also applicable.

[0032]

As described above, according to the present invention,
Providing a searchable database based on keywords,
When a part of the multiplex information received by the recipient is specified as a keyword, the database is searched based on the specified keyword and the search results are displayed on the display unit. It is possible to search the database by simply specifying a part of the received multiplex information instead of the troublesome operation of specifying and then various information related to the keyword included in the received character string is displayed. Since it is extracted from the database and displayed on the display unit, it is possible to confirm the meaning of the keyword and the related information thereof, and to have a multi-layered understanding of the on-air multiple information.

The present invention also provides a keyword designating means,
It is composed of cursor keys that specify the received multiple information in character units. By designating the part to be the keyword while moving the cursor that is movably displayed on the screen of the display unit on the multiple information by key operation, it is possible to specify the keyword very easily.

Further, according to the present invention, the database is searched by using a part or all of the character string included in the received multiplex information as a keyword, and when the database contains data with the keyword as an index, the display section displays. Since the corresponding keyword portion in the character string is configured to be highlighted, the character string forming the received multiplex information is segmented into words by, for example, a character analysis technique, and a part or all of the segmented words are defined as keywords. When the database is searched as, and it is found that the index corresponding to the keyword is included in the database, the keyword part corresponding to the index found to exist is highlighted so that it can be visually distinguished from other parts,
For example, it is possible to visually appeal to the user that there is related information in the data stored in the database by performing black-and-white reverse display, hatching display, or underline display. Even if the keyword is not specified, the database is automatically searched for the words included in the received character string forming the multiplex information, so that the burden on the user for searching the database can be considerably reduced. . Further, according to the present invention, the correspondence data is read out from the database and displayed on the display unit only for the keyword for which disclosure is specified from the highlighted keywords. Therefore, one of the character strings is displayed on the screen of the display unit. The user who found that the relevant information exists in the database by looking at the highlighting attached to the part, simply points the highlighted keyword, for example, with the cursor, and immediately specifies the data corresponding to the designated keyword in the database. Can be read out on the screen from the screen, which allows you to quickly display related information you want to know, and even if the received multiple information contains many words and phrases that exist as an index in the database, the specified information was specified on the screen. The relevant information is read from the database only for words and phrases, so the information you want to know may vary depending on the person. The effect of such may be appropriately respond to such various needs of many users.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an FM teletext broadcast receiver of the present invention.

FIG. 2 is a diagram showing an appearance of the FM teletext broadcast receiver shown in FIG.

FIG. 3 is a flowchart showing a procedure for searching a database based on keywords.

FIG. 4 is a diagram showing a hierarchical structure of DARK used for FM character multiplex broadcasting.

5 is a diagram showing a configuration of a data packet shown in FIG.

FIG. 6 is a block diagram showing an example of a conventional FM teletext broadcast receiver.

[Explanation of symbols]

 8 Display Unit 11 FM Text Multiplex Receiver 12 Control Unit 13 Database Storage Unit 14, 15 External Connection Interface 20 Cursor Key 21 Print Button 22 Transfer Button 40 Printer 50 FD Device

Claims (4)

[Claims] 1. An FM character multiplex broadcasting receiver that receives and demodulates FM character multiplex broadcasting, and displays multiplex information on a display unit. A database that can be searched based on a keyword and a receiver operated and received. A keyword specifying unit that specifies a part of the multiplex information as a keyword; and a control unit that searches the database using the keyword specified by the keyword specifying unit as an index and displays the search result on the display unit. Characteristic FM character multiplex broadcasting receiver. 2. The FM character multiplex broadcasting receiver according to claim 1, wherein the keyword specifying means comprises a cursor key for specifying the received multiplex information for each character. 3. An FM character multiplex broadcasting receiver which receives and demodulates FM character multiplex broadcasting and displays the multiplex information on a display unit, and a database which can be searched based on a keyword and a character included in the received multiplex information. When the database is searched using a part or all of the columns as keywords, and when the database contains data with the keywords as an index, the corresponding keyword portion in the character string displayed by the display unit is highlighted. An FM text multiplex broadcast receiver comprising a control unit. 4. The control unit reads the corresponding data from the database and displays the corresponding data on the display unit only for the keyword for which disclosure is specified from among the highlighted keywords. The described FM character multiplex broadcasting receiver.