JP4793146B2 - Broadcast receiving apparatus, broadcast receiving method and program - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus, a broadcast receiving method, and a program for receiving a broadcast radio wave obtained by multiplexing a program broadcast and a data broadcast, and more particularly, to a broadcast receiving apparatus and a broadcast receiving method for improving text reception processing in a data broadcast. And programs.

  In RDS (Radio Data System) adopted as a standard for FM radio broadcasting with data broadcasting in Europe, broadcast stations can appropriately transmit text information called radio text. For example, while a music program is being broadcast on the radio program side, the name and artist name of the music are played on the data broadcast side.

  Patent Document 1 discloses that radio text is extracted from a data broadcast compliant with RDS and displayed on a display (paragraph 0002 of Patent Document 1). Patent Document 1 also searches for FM stations that are currently broadcasting radio text, stores the radio text from each FM station in a memory (S4, S5 in FIG. 2 of Patent Document 1), and after the search is completed. Discloses displaying radio text from each FM station and allowing the user to select a desired FM station with radio text (S9, S11, S12 in FIG. 2 of Patent Document 1).

Patent Document 2 discloses that an RDS receiver displays not only current radio text but also past radio text while suppressing an increase in memory capacity (paragraphs 0008 and 0028 of Patent Document 2). That is, the radio text is appropriately changed, and the same content is repeatedly handled by the broadcast station. The RDS receiver of Patent Document 2 receives the radio text received this time. Whether or not the contents of the text are new is detected, and only new ones are additionally stored in the storage device so that past radio text can be displayed later (paragraph 0026 of Patent Document 2). And S29 in FIG.
JP-A-10-112664 Japanese Patent Laid-Open No. 10-341174

  Radio text in RDS is to be transmitted 64 characters regardless of the actual number of characters, and is transmitted intermittently divided into a plurality of groups of type 2A. A group of type 2A (hereinafter referred to as “group 2A”) can carry only 4 characters per group, and in order to receive all 64 characters, a total of 16 groups 2A must be received. , Takes considerable time.

  The radio text may include the name of the music and the name of the artist for the music being broadcast in the radio program broadcast multiplexed together with the data broadcast. In the conventional RDS receiver, a total of 16 radio texts are included. After the reception of the group 2A is completed, the song name and artist name are confirmed and the display of the song name and the like is started. Therefore, the radio text such as the song name is displayed on the display unit, etc. There is a delay in processing.

  Although Patent Document 1 discloses collecting radio text from each RDS station, it does not mention anything about speeding up the process of item contents such as a song name in the radio text from each RDS station. Similarly, Patent Document 2 discloses that a plurality of radio texts whose contents change from time to time from the same RDS station are rationally stored, but items such as music titles in the radio text from each RDS station. There is no mention of speeding up content processing.

  An object of the present invention is to provide a broadcast receiving apparatus, a broadcast receiving method, and a program capable of accelerating the processing start of text of a predetermined item in radio text.

The broadcast receiving apparatus of the present invention receives a broadcast radio wave obtained by multiplexing a program broadcast and a data broadcast. In the data broadcast, the data set unit transmits predetermined data for each type, and the type of data related to the predetermined information text. The collective unit is a broadcast receiving apparatus in which a plurality of predetermined information texts are written in order from the first character and transmitted intermittently. The predetermined item text included in the predetermined information text Position information extracting means for extracting position information in the information text from the data broadcast, text information receiving means for receiving the data set unit of the type related to the predetermined information text, and text of the predetermined item based on the position information The data set unit in which the last character is written is detected, and the data set unit is received as the predetermined information text. When stage receives, before completing the reception of the predetermined information for all of the data set unit assigned to the text, and a display processing means for starting the display processing of the text of the predetermined items.

The broadcast receiving method of the present invention receives a broadcast radio wave obtained by multiplexing a program broadcast and a data broadcast. In the data broadcast, the data set unit transmits predetermined data by type, and the type of data related to the predetermined information text. The collective unit is a broadcast receiving method in which a plurality of predetermined information texts are written in order from the first character and transmitted intermittently, and the predetermined information text included in the predetermined information text is the predetermined item text. Extracting the position information in the information text from the data broadcast, receiving a data set unit of a type related to the predetermined information text, and writing the last character for the text of the predetermined item based on the position information When detecting the data set unit for receiving said data collection unit, all assigned to the text for the predetermined information Before leaving the reception data set unit, a step for starting a display process of a text of the predetermined items.

  The program of the present invention causes a computer to function as each means of the broadcast receiving apparatus of the present invention.

  According to the present invention, processing such as displaying text of a predetermined item such as a song name is not performed after receiving the last data set unit related to the predetermined information text but for the predetermined information about the text of the predetermined item. Since the data set unit of the last character of the text can be received based on the position information in the text, the start can be accelerated.

  FIG. 1 is a configuration diagram of an in-vehicle FM radio 10. The FM radio 10 is mounted on a car together with the speaker 25 and the car navigation device 28. The antenna 11 receives FM radio waves. Among the FM radio waves received by the antenna 11, FM broadcast including radio broadcast (radio program broadcast) and RDS standard data broadcast, and FM broadcast including only radio broadcast and not data broadcast are mixed.

  Based on the frequency control signal from the CPU 13, the front end 12 converts the FM reception radio wave of the selected frequency from the FM reception radio wave of the antenna 11 into an intermediate frequency signal (IF signal) and sends it to the demodulator 14. The demodulator 14 demodulates the intermediate frequency signal from the front end 12 and separates the demodulated signal into a radio broadcast signal and an RDS broadcast signal.

  The demodulated signals of radio broadcast and data broadcast output from the demodulator 14 are sent to the audio amplifier 15 and the RDS decoder 16, respectively. The plurality of speakers 25 are arranged in a predetermined part (eg, left and right of the front part of the passenger compartment, and in some cases, left and right positions of the rear part of the passenger compartment) in the passenger compartment. The audio amplifier 15 amplifies the demodulated signal from the demodulator 14 based on the volume control signal from the CPU 13 and sends it to the speaker 25. Thus, the sound of the radio program in the selected FM broadcast is output from the speaker 25.

  Note that the data broadcast processing related elements in the FM radio 10 are operable even during a period when the user is not listening to the radio program. During this period, sound of FM broadcast radio program is not output from the speaker 25, but data broadcast information such as traffic information is displayed on the display 20 or sent from the CPU 13 to the active car navigation device 28. The car navigation device 28 can perform processing.

  The RDS decoder 16 decodes the demodulated signal of the data broadcast from the demodulator 14 and extracts various information including radio text and TMC (Traffic Message Channel) information. Various information extracted from the data broadcast by the RDS decoder 16 is sent to the CPU 13. The operation keys 19 include both those equipped on the main body of the FM radio 10 and those equipped on the remote control. The display 20 is composed of, for example, an LCD (Liquid Crystal Display). The operation key 19 and the display device 20 may be provided exclusively for the FM radio 10 in a vehicle equipped with the FM radio 10, or may be provided for both the FM radio 10 and the car navigation device 28. A touch panel may also be used as the operation key 19 and the display device 20.

  The CPU 13 detects a user operation on the operation key 19 and performs a process corresponding to the user operation. The CPU 13 also sends display data for generating a display screen to the display device 20. The storage device 21 includes a ROM and a RAM. The ROM stores a program executed by the CPU 13, predetermined data, and the like. The RAM temporarily stores data when the CPU 13 performs predetermined processing or calculation. Used as a place.

  The CPU 13 reads a program from the ROM of the storage device 21, executes the program, and can write data to the storage device 21. The CPU 13 sends information from the RDS decoder 16 to the display device 20 and displays it on the display device 20 or sends it to the car navigation device 28. TMC information or the like during data broadcasting is normally sent from the CPU 13 to the car navigation device 28 and displayed or processed in the car navigation device 28.

  FIG. 2 shows an RDS type 2A group (hereinafter, in order to identify the RDS group by type, it will be referred to as a simple name with a type name added after the group, such as “Group 2A”). The format is shown. In RDS, a data set unit called a group is defined, and each group is composed of four blocks of 26 bits, and one group is 104 bits in total. Each block is composed of a 16-bit information word on the head side and a 10-bit check word on the tail side.

  The first block of the group includes a program identification (PI) code. The second block includes a group type code and an A / B discrimination flag. By checking the group type code and the A / B discrimination flag, the group type (group 2A in FIG. 2) is detected. can do. In RDS, group 2A is defined as a group for radio text transmission. The second block further has a 4-bit text segment address code. The text segment address code will be described later.

  In the radio text segment of the 3rd and 4th blocks of group 2A, 2 characters of radio text are written respectively, and in the group 2A as a whole, 4 characters of radio text are written. Yes. Radio text is transmitted in either group 2A or group 2B, but the maximum number of characters in radio text is limited to 64 for group 2A and 32 for group 2B. The radio text is transmitted by 16 groups 2A in total starting from the first group 2A, four by four from the first character. At that time, an identifier indicating the number of each group 2A is required, but a 4-bit text segment address code is used as the identifier.

  FIG. 3 shows the format of the RDS group 3A. However, in each block, only the information word is shown, and the correction word is omitted. In block 1, a PI code is written. In the first 5 bits of block 2, 3A indicating the type of group is written. Block 4 is populated with “4BD7” which means AID (Application Identification).

  At the end of block 2, 11A for designating an ODA (Open Data Applications) group is written. The group 11A is originally a group whose contents can be freely defined by the user, that is, the application, and the user, that is, the application includes the predetermined contents in the group 11A and is transmitted by the designation of the group 11A in the group 3A. In the block 3 of the group 3A, messages of rfu, CB flag, SCB, and template are written in order from the top.

  FIG. 4 shows the format of the RDS group 11A. However, in each block, only the information word is shown, and the correction word is omitted. In block 1, a PI code is written. In the first 5 bits of block 2, 11A indicating the group type is written.

  The content type, the start marker, and the length marker form one set, and a total of two sets are arranged in the group 11A in a back-aligned manner. In front of them, an item toggle bit and an item running bit are arranged in order from the top. The meaning of each field is as follows.

Item toggle bit: 0 and 1 are alternately switched every time the item changes.
Item running unit: This is an item validity / invalidity judgment bit. If it is 1, it means validity.
Content type: For example, content type = 1 is defined as a music title, and content type = 4 is defined as an artist name.

Start marker: In the character string of 64 characters, the position of the start character of the content is indicated by a count value. The count value of the start marker = character number-1. The character number is a number from the beginning of each character in the radio text. It should be noted that the first and last characters in the radio text are 1 and 64 in the character number, respectively, whereas the start marker count values are 0 and 63, respectively.

Length marker: indicates information related to the number of characters of the corresponding content type, and the number of characters of the corresponding content type = value of the length marker + 1. In FIG. 5 to be described later, as described for the number of characters of the song name and the artist name, the length marker for the song name = 22 means that the number of characters of the song name is 23, and the length marker for the artist name = 10 means 11 characters of the artist name.

  FIG. 5 is an example of the radio text that flows in the group 3A. The upper row shows the contents of the radio text, and the lower row shows the character number of each character in the radio text. In the group 3A, each character of the radio text is written, but the character number is not written, and is shown in FIG. 5 for convenience of explanation. As for the character number, the first character of the radio text is 1, and the last character is 64. In radio text with fewer characters, the end is blank. The radio text in FIG. 5 is “You are listening to“ House of the rising sun ”by Eric Burdon.”, And information on the music currently being streamed in the FM radio program multiplexed with data broadcasting It has become. The music information includes two items, a music name and an artist name. “House of the rising sun” means a music name, and “Eric Burdon” means an artist name.

  The FM station that plays the music plays the group 11A in FIG. 4 together with the group 3A in FIG. Specific contents such as the content type of the group 11A are as follows.

Content type 1: 1
Start marker 1:22
Length marker 1:22

Content type 2: 4
Start marker 2:50
Length marker 2:10

  As described above, content type = 1 is defined as a song name. As for the music title, start marker 1 = 22 and length marker = 22. Since the character number corresponds to the start marker +1, in the example of the radio text in FIG. 5, the character number 23 is H of the first character of the music title. Further, since the number of characters is the value of the length marker +1, it corresponds to the character number of the last character of the music name = start marker 1 + length marker 1 + 1, so 22 + 22 + 1 = 45. In this way, “House of the rising sun” with the character numbers 23 to 45 is extracted as the song name.

  Content type = 4 is defined as an artist name. Regarding the artist name, start marker 2 = 50 and length marker 2 = 10. Since the character number corresponds to the start marker +1, the character number 51 is the first E of the artist name in the radio text example of FIG. Further, since the number of characters is the value of the length marker + 1, the character number of the last character of the artist name corresponds to the start marker 2 + the length marker 2 + 1, and thus 50 + 10 + 1 = 61. Thus, “Eric Burdon” with the character numbers 51 to 61 is extracted as the artist name.

  Thus, the first character position and the last character position of the radio text portion such as the music title and the artist name are determined from the information of the group 11A, and accordingly, the text as the identifier of the group 3A that transmits the last character. A segment address code can be determined.

  FIG. 6 is a flowchart of the radio text + use range information obtaining method 35. Radio text + is a name of an extended version of radio text, and “Plus” may be added instead of “+”.

  In S36, it is determined whether or not the group 3A (FIG. 3) having the AID has been received. If the determination is positive, the process proceeds to S37, and if not, the radio text + range information obtaining method 35 is terminated. .

  In S37, an ODA group is detected from the received group 3A with AID. In the example of the group 3A in FIG. 3, the ODA group is 11A. Henceforth, for convenience of explanation, the ODA group is 11A. In S38, it is determined whether or not the group 11A as the ODA group has been received. The determination in S38 is repeated until the determination becomes positive, and the process proceeds to S39 as soon as it becomes positive.

  In S39, the content type, start marker, and length marker values for the predetermined item are detected from the received group 11A. It is assumed that the predetermined item is not limited to a single item (for example, only a song name or only an artist name), and may be a plurality (eg, a song name and an artist name). In the example of FIG. 4, the predetermined item includes a plurality of music titles and artist names. In S40, a start marker and a length marker for the predetermined item detected in S39 are set for processing of a radio text + capturing method 50 (FIG. 7) described later.

  FIG. 7 is a flowchart of the radio text + capturing method 50. In S51, it is determined whether or not the group 2A (FIG. 2) has been received. If the determination is positive, the process proceeds to S52, and if not, the radio text + capturing method 50 is terminated.

  In S52, the number of the character (the lower number in FIG. 5) transmitted by the group 2A received this time for the radio text is determined. The group 2A itself does not transmit a character number, but can be determined from, for example, the text segment address code of the group 2A. In S53, the character received by the group 2A received this time for the radio text is recorded in the RAM.

  In S54, it is determined whether or not acquisition of all radio text portions for a predetermined item (eg, song name and / or artist name) has been completed from the character number associated with the current character. The determination is based on the character start position and length set in S40 of the radio text + range information acquisition method 35, and the character number related to the character received this time is equal to or greater than the number of the last character of the radio text part of the predetermined item. It can be determined by whether or not. If the determination in S54 is positive, the process proceeds to S55, and if not, the radio text + capturing method 50 is terminated.

  In S55, a radio text confirmation completion flag for a predetermined item is set. Therefore, text processing for a predetermined item such as a song name or an artist name can be started before the reception of all 16 groups 2A is completed. As an example of the text processing, there is a process of displaying the music name and artist name on the display for the music currently flowing from the speaker.

  Thus, in the radio text + range information obtaining method 35 and the radio text + capturing method 50, the text of a predetermined item to be transmitted by the radio text can be quickly determined and the processing can be started.

  FIG. 8 is a block diagram of the broadcast receiving apparatus 60. The above-described in-vehicle FM radio 10 is a specific example of the broadcast receiving device 60. The broadcast receiving device 60 is not limited to the on-vehicle type, and may be a stationary type or a portable type that is stationary at home or business. The broadcast receiving device 60 is typically a radio, but may be a television, and may be incorporated in another processing device such as a mobile phone.

  The broadcast receiving apparatus 60 typically receives an RDS data broadcast, but is not limited thereto, and may receive a data broadcast that complies with other standards. The broadcast receiving device 60 includes position information extracting means 61, text information receiving means 62 for predetermined information, and confirmation means 63. The broadcast receiver 60 receives broadcast radio waves obtained by multiplexing program broadcasts and data broadcasts. In data broadcasting supported by the broadcast receiving device 60, the data set unit transmits predetermined data by type, and the data set unit of the type related to the predetermined information text includes a plurality of predetermined information texts in order from the first character. Each one is written and transmitted intermittently.

  The position information extracting means 61 extracts position information in the predetermined information text from the data broadcast for the predetermined item text included in the predetermined information text. The predetermined information text text receiving means 62 receives a data set unit of a type related to the predetermined information text. The confirmation unit 63 detects the data set unit in which the last character is written for the text of the predetermined item based on the position information, and responds to the reception of the predetermined information text text receiving unit 62 by the data set unit. Determine the text of a given item.

  The data set unit corresponds to a group by type in which four blocks are grouped in RDS data broadcasting. In the RDS data broadcasting, the position information extraction unit 61 extracts position information in a predetermined information text from, for example, the group 11A (FIG. 4) for a predetermined item text.

  The text for predetermined information means a radio text in RDS data broadcasting. The data set unit of the type relating to the predetermined information text corresponds to group 2A in RDS data broadcasting. In typical data broadcasting, each predetermined information text is assigned a predetermined number of data set units regardless of the number of characters. In RDS data broadcasting, a total of 16 groups 3A as predetermined information texts are fixedly assigned to each radio text.

  The position information is written in a data set unit of a type whose contents can be freely defined by the application. The data set unit corresponds to the group 11A (FIG. 2) in RDS data broadcasting. The predetermined information text is, for example, information related to a program currently being broadcast in a program broadcast. When music is being played in the program broadcast, the text of the predetermined item is, for example, a music name and an artist name.

  The position information is typically information on the position and length of the first character of the text of the predetermined item in the text for predetermined information. However, instead of the length, the position information may be the position of the last character in the text for predetermined information. Good. Further, only the position in the text for predetermined information of the last character can be used as the position information.

  FIG. 9 is a flowchart of the broadcast receiving method 80. The radio text + range information obtaining method 35 and the radio text + capturing method 50 described above are specific examples of the broadcast receiving method 80. In the broadcast receiving method 80, a broadcast radio wave obtained by multiplexing a program broadcast and a data broadcast is received. In the data broadcasting to which the broadcast receiving method 80 corresponds, the data set unit transmits predetermined data by type, and the data set unit of the type related to the predetermined information text has the predetermined information text in order from the first character. A plurality are written and transmitted intermittently.

  In S81, the position information in the predetermined information text is extracted from the data broadcast for the predetermined item text included in the predetermined information text. In S82, a data set unit of a type related to the predetermined information text is received.

  In S83, it is determined whether or not reception of the data set unit in which the last character is written for the text of the predetermined item is completed based on the position information, and the process proceeds to S84 as soon as reception is completed. In S84, the text of the predetermined item is confirmed.

  What has been described as a specific aspect of the radio text + acquisition method 50, that is, that a predetermined number of data set units are allocated for each predetermined information text, and the position information is the first character text for the predetermined information It can be applied as a specific aspect of the broadcast receiving method 80 that it is information on the internal position and length, and that the positional information is written in a data set unit of a type whose contents can be freely defined by the application. .

  The program to which the present invention is applied causes a computer to function as each unit of the broadcast receiving device 60. Another program to which the present invention is applied causes a computer to execute each step of the broadcast receiving method 80.

  Although the present invention has been described with respect to various specific embodiments, the present invention is not limited to this, and each component in the various specific embodiments is modified (including deletion) without departing from the gist of the invention. And can be materialized. Various inventions can also be formed by replacing constituent elements between various specific forms or combining a plurality of constituent elements in various specific forms.

It is a block diagram of a vehicle-mounted FM radio. It is a figure which shows the format of the group of RDS type 2A. It is a figure which shows the format of the group 3A of RDS. It is a figure which shows the format of the group 11A of RDS. It is a figure which shows an example of the radio text sent by group 3A. It is a flowchart of a radio text + range information acquisition method. It is a flowchart of the taking-in method for radio text +. It is a block diagram of a broadcast receiving apparatus. It is a flowchart of a broadcast receiving method.

Explanation of symbols

60: Broadcast receiving device 61: Position information extracting means 62: Text text receiving means for predetermined information 63: Determination means 80: Broadcast receiving method

Claims (8)

A broadcast radio wave obtained by multiplexing a program broadcast and a data broadcast is received. In the data broadcast, a data set unit transmits predetermined data by type, and a data set unit of a type related to a predetermined information text is a predetermined information text. Is a broadcast receiving device in which a plurality of characters are written in order from the first character and transmitted intermittently,
Position information extracting means for extracting position information in the predetermined information text from a data broadcast for a predetermined item of text included in the predetermined information text;
A predetermined information text receiving means for receiving a data set unit of a type relating to the predetermined information text, and detecting the data set unit in which the last character is written for the text of the predetermined item based on the position information; When the predetermined information text receiving means receives a unit, display processing means for starting the display processing of the text of the predetermined item before finishing the reception of all data set units assigned to the predetermined information text ,
A broadcast receiving apparatus comprising:   2. The broadcast receiving apparatus according to claim 1, wherein in the data broadcasting, a predetermined number of data set units are assigned to each predetermined information text regardless of the number of characters.   3. The broadcast receiving apparatus according to claim 1, wherein the position information is information on a position and length in a predetermined information text for a first character of the text of the predetermined item.   4. The broadcast receiving apparatus according to claim 1, wherein the position information is written in a data set unit of a type whose contents can be freely defined by an application.   5. The broadcast receiving apparatus according to claim 1, wherein the predetermined information text is information relating to a program currently being broadcast in the program broadcast. Wherein the predetermined item text broadcast receiver according to claim 5, wherein the at least one of artist names及beauty song name. A broadcast radio wave obtained by multiplexing a program broadcast and a data broadcast is received. In the data broadcast, a data set unit transmits predetermined data by type, and a data set unit of a type related to a predetermined information text is a predetermined information text. Is a broadcast reception method in which a plurality of characters are written in order from the first character and transmitted intermittently,
Extracting the position information in the predetermined information text from the data broadcast for the text of the predetermined item included in the predetermined information text;
Receiving a type of data set units according to the text for predetermined information, and receives the detected the data set unit data set unit being written to the last character on the text of the predetermined items on the basis of the position information Starting the display processing of the text of the predetermined item before finishing the reception of all data set units allocated to the text for the predetermined information ,
A broadcast receiving method comprising: The program which makes a computer function as each means of the broadcast receiving apparatus in any one of Claims 1-6.

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