KR102113046B1 - Method for displaying name of broadcasting station in radio data system receiver - Google Patents

Abstract

The present invention discloses a method for displaying the name of a broadcasting station in an RDS broadcast receiving device. The method of displaying a broadcasting station name of the RDS broadcasting receiving apparatus of the present invention includes: a control unit extracting PI (Program Identification) information and PS (Program Service) information from a data broadcasting signal received through an RDS tuner; Counting the number of receptions for each PS information; Mapping the PI information and the PS information to the PS information for the PS information that is equal to or greater than a set number of times for each PS information, and storing the PI information; And outputting the PS information mapped to the PI information as a broadcasting station name.

Description

How to display the station name of the RDS broadcast receiving device {METHOD FOR DISPLAYING NAME OF BROADCASTING STATION IN RADIO DATA SYSTEM RECEIVER}

The present invention relates to a method for displaying a broadcasting station name of an RDS broadcasting receiving apparatus, and more specifically, an RDS broadcasting receiving apparatus capable of identifying and displaying a broadcasting station name even though various information is provided through a PS field in a broadcasting station providing an RDS service. It relates to a method for identifying the name of the station.

In general, the control code or digital data is multi-transmitted using a subcarrier for FM broadcasting, and the frequency of the subcarrier among the spectral margin of the existing FM broadcast (50 to 100 kHz) is three times the frequency of the pilot (19 kHz) or 57 kHz RDS (Radio Data System) is a method to provide a variety of services such as automatic tuning, broadcasting station name, traffic information, text broadcasting, time information, wireless calling by digitally multiplexing 16 or more codes in the vicinity of 4 times with PSK balanced modulation. I call it.

RDS has been developed based on the German Automaturer rundfunk information (ARI) for the selective reception of traffic information broadcasting and the Swedish program identification / public information (PI) system for radio paging services.

In Europe, many broadcasting stations make up a network to broadcast the same program. As such, many stations select and receive the best radio reception (optimal reception function) or drive various areas in the distance by car. When receiving an FM radio signal, the function of automatically selecting (automatic tracking function) a station with a stronger electric field strength depending on the region can be realized using a list of alternative frequencies (AF) signal and a program identification (PI) signal. The AF signal is a frequency list of broadcasting stations broadcasting the same program. When a certain broadcast is received, the AF signal and the PI signal are stored in the memory. Select a station automatically.

The PI signal can be verified by comparing whether the received program is the same program or not with the PI signal stored in the memory, and display the name of the currently received broadcast station by the PS (Program service name) field.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 2000-0033787 (published on June 15, 2000, name of the invention: a method for receiving traffic information using RDS data).

In this way, in the RDS standard, the program service name is defined as fixed information that provides information on the broadcasting station by matching the PI (Programme Identification) code, which is a unique identifier assigned to each broadcasting station. It is recommended to use a fixed PS field to identify the broadcasting station.

That is, since a station name is provided through the PS field, a preset list function that stores user-favored station information and a station list function that displays a list of stations having good reception status are related to the corresponding station. The same broadcast station name is always displayed as the PS field.

However, various broadcasting stations providing RDS service ignore this and are transmitted in alternating various information such as broadcast program name, song song name, singer name, and station phone number in the PS field.

When various information is alternately transmitted in the PS field as described above, when the user saves the PS field in the preset list or adds it to the station list, the station name may be stored normally, but the singer name or song song name is stored, and not the actual station name. There is a problem in that other information is displayed in the preset list and the station list.

The present invention was created to improve the above problems, and an object of the present invention is to provide an RDS broadcast receiving device capable of identifying and displaying the name of a broadcasting station even though various information is provided through a PS field in a broadcasting station providing an RDS service. It provides a method for displaying the name of a broadcasting station.

A method of displaying a broadcasting station name of an RDS broadcast receiving apparatus according to the present invention includes: a control unit extracting PI (Program Identification) information and PS (Program Service) information from a data broadcast signal received through an RDS tuner; Counting the number of receptions for each PS information; Mapping the PI information and the PS information for the PS information having a reception frequency for each PS information or more, and storing it in the storage unit; And outputting PS information mapped to PI information as a broadcasting station name.

In the present invention, after the control unit extracts the PI information, it further comprises the step of retrieving the PI information initially set in the storage unit and outputting PS information mapped to the PI information as a broadcasting station name when the PI information is searched.

In the present invention, when the PI information is retrieved from the storage unit after the control unit extracts the PI information, the method further includes outputting PS information mapped to the PI information as a broadcasting station name.

The method of displaying the station name of the RDS broadcast receiving device according to the present invention counts the repeated PS information even if the station providing the RDS service provides various information through the PS field, and identifies the repeated PS information over the set number of times as the station name By displaying, it is possible to provide a preset list and a station list with actual broadcasting station names.

In addition, according to the present invention, when PI information is extracted from the RDS broadcast signal, the PS information mapped to the PI information is searched in the storage unit to display the station name, so that the user can tune into the tuned channel even before the PS information is extracted. You can quickly check the name.

1 is a block diagram showing an RDS broadcast receiving apparatus according to an embodiment of the present invention.
2 is a data structure diagram of an OA group among RDS data groups for transmitting PS information in an RDS broadcast receiving device according to an embodiment of the present invention.
3 is an exemplary view showing a PS extraction table of a storage unit in an RDS broadcast reception device according to an embodiment of the present invention.
4 is a flowchart for explaining a method of displaying a broadcasting station name in an RDS broadcast receiving apparatus according to an embodiment of the present invention.

Hereinafter, a method of displaying a broadcasting station name in an RDS broadcast receiving apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing an RDS broadcast receiving apparatus according to an embodiment of the present invention, and FIG. 2 is an OA group among RDS data groups for transmitting PS information in an RDS broadcasting receiving apparatus according to an embodiment of the present invention. 3 is an exemplary diagram showing a PS extraction table of a storage unit in an RDS broadcast reception device according to an embodiment of the present invention.

1 to 3, the RDS broadcast receiving apparatus according to an embodiment of the present invention includes an RDS tuner 10, a demodulator 20, an amplifying unit 30, a speaker 40, and an RDS decoder 50 ), An input unit 70, a display unit 80, a storage unit 90, and a control unit 60.

The RDS tuner 10 receives a wireless data broadcast signal through an antenna (not shown) and outputs it to the demodulator 20 and the RDS decoder 50.

The demodulator 20 demodulates the RDS data broadcast signal input from the RDS tuner 10, and outputs the demodulated audio signal to the amplifying unit 30.

The amplifying unit 30 receives the audio signal, amplifies it, and outputs it to the speaker 40.

The input unit 70 is a configuration for user input, and may be made of ordinary key means. The user can select a desired radio broadcast through the input unit 70.

The display unit 80 may be a liquid crystal display, and displays a station name through a preset list and a station list.

The RDS decoder 50 decodes the RDS data group in the RDS data broadcast signal input from the RDS tuner 10.

PS (Program Service) information is transmitted through 0A group or 0B group among RDS data transmitted by a broadcasting station. The data structure of the OA group is configured as shown in FIG. 2. And the OB group is the same as the 0A group except that it has a PI (Program Identification) code instead of 2 bytes of AF (Alternative Frequency).

The storage unit 90 is a first mapping table 92 that maps PI information and PS information to an initial setting, and a second mapping table for mapping, storing and updating PI information and PS information received from an RDS data broadcast signal. (94) and a PS extraction table (96) for counting the number of receptions for each PS information.

The first mapping table 92 maps and provides PI information and PS information for a main broadcasting station as an initial setting so that PS information can be output as a broadcasting station name even if only PI information is extracted. At this time, the first mapping table 92 is an initially set and stored table and is not updated by PI information and PS information extracted through an RDS data broadcast signal.

The second mapping table 94 receives the RDS data broadcast signal and maps and stores the extracted PI information and PS information, and then updates when the mapping of the PI information and the PS information changes, updating while saving the new mapping information do.

The PS extraction table 96 stores the number of reception counted for each extracted PS information as shown in FIG. 3.

The control unit 60 extracts PI information and PS information from the data broadcast signal received through the RDS decoder 50 and retrieves the PI information from the first mapping table 92 and the second mapping table 94 of the storage unit to map them. The displayed PS information is displayed as the station name.

In addition, when the PS information is extracted, the control unit 60 counts and stores the PS information received in each PS information in the PS extraction table, and when the received number is greater than or equal to the set number, maps PS information greater than the set number to PI information. It is stored in the second mapping table 94 of the storage unit 90 and outputs PS information through the display unit 80 as a broadcasting station name.

Accordingly, even if various stations provide various information through the PS field, the station providing the RDS service counts the repeated PS information, and if the received number of times is repeated more than the set number of times, the corresponding PS information can be identified and displayed as the station name.

4 is a flowchart for explaining a method of displaying a broadcasting station name in an RDS broadcast receiving apparatus according to an embodiment of the present invention.

As shown in FIG. 4, in the method of displaying a station name of the RDS broadcast receiving device according to an embodiment of the present invention, first, when the controller 60 selects and tunes a station through the input unit 70, the RDS tuner ( 10) receives the data broadcast signal received through (S10).

Thereafter, the RDS data received through the RDS decoder 50 is decoded (S12).

In this way, the RDS data broadcast signal is received and decoded through the RDS decoder 50 to extract PI (Program Identification) information and PS (Program Service) information (S14).

At this time, if PI information is extracted, it is searched whether PI information exists in the first mapping table 92 of the storage unit 90 (S16).

That is, it is searched whether the extracted PI information exists in the initially set PI information, and when the PI information exists, the PS information mapped with the PI information is output through the display unit 80 as the broadcaster name (S28).

However, if the extracted PI information does not exist in the initially set first mapping table 92, it is searched whether it exists in the second mapping table 94 (S18).

At this time, if the PI information exists in the second mapping table 94, the PS information mapped with the PI information is output as the broadcasting station name (S20).

Since the PS information can extract two characters from the PS field of the RDS data, it is necessary to receive four consecutive RDS data to extract the eight-character PS information.

Therefore, after extracting PI information, in order to extract PS information, at least four RDS data must be decoded for extraction, so first, PS information mapped to PI information is stored in the first mapping table 92 stored in the storage unit 90 ) And the second mapping table 94 to display and search the user for the tuned channel name.

When the PI information is present in the first mapping table 92 (S16), it is determined as accurate information as information on the main broadcasting station that is initially set, and the PS extraction for identifying the broadcasting station is omitted and the first mapping table 92 is used. It may be terminated by outputting the stored PS information as a broadcasting station name (S28).

However, when PI information is present in the second mapping table 94 (S18), PS information is extracted by counting the number of receptions for each extracted PS information by extracting PS information to secure reliability as information identified through an RDS data broadcast signal. It is stored in (96) (S22).

Subsequently, the received frequency of each PS information stored in the PS extraction table 96 is compared (S24), and the PS information having a set number of times or more is mapped to PI information and stored in the second mapping table 94 for updating (S26).

As shown in FIG. 3, when viewing the number of receptions for each PS information stored in the PS extraction table 96, it can be seen that 'FFH' is 8 times, which is the highest number of receptions.

This is a variety of information through the PS field. If you provide not only the broadcasting station name, but also the broadcasting program name, the name of the song being played, and the singer's name, the program name, song song, and singer name can be changed, but the broadcasting station name is not changed. Since the information is the most repeatable information, it is possible to identify the PS information having the greatest number of receptions as a broadcasting station.

As described above, PS information is output as the name of a broadcasting station for PS information having a reception frequency for each PS information or more that is set (S28).

As described above, according to the method of displaying the name of a broadcasting station of an RDS broadcasting receiving apparatus according to the present invention, even if various information is provided through a PS field in a broadcasting station providing an RDS service, the repeated PS information is counted to repeat the set number of times or more. By identifying and displaying the information as the station name, it is possible to provide a preset list and a station list as the actual station name. When PI information is extracted from the RDS broadcast signal, the PS information mapped to the PI information is retrieved from the storage unit to retrieve the station name. By displaying, even before the PS information is extracted, the user can quickly check the name of the station for the tuned channel.

The present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art belongs can various modifications and equivalent other embodiments from this. Will understand.

Therefore, the technical protection scope of the present invention should be defined by the following claims.

10: RDS tuner 20: demodulator
30: amplification unit 40: speaker
50: RDS decoder 60: control unit
70: input unit 80: display unit
90: storage unit 92: first mapping table
94: 2nd mapping table 96: PS extraction table

Claims (3)

The controller extracts PI (Program Identification) information and PS (Program Service) information from the data broadcast signal received through the RDS tuner;
After the control unit extracts the PI information, retrieves the PI information initially set in the first mapping table of the storage unit and outputs the PS information mapped to the PI information as a broadcasting station name when the PI information is searched;
Outputting the PS information mapped to the PI information as a broadcasting station name when the PI information is searched in the second mapping table of the storage unit after the controller extracts the PI information;
Counting the number of receptions for each PS information;
Mapping the PI information and the PS information with respect to the PS information, wherein the number of receptions for each PS information is greater than or equal to a set number, and storing the PI information in the second mapping table of the storage unit; And
And outputting the PS information mapped to the PI information stored in the second mapping table of the storage unit as a broadcasting station name.
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