JP2014127901A - Broadcast receiving device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect a correct broadcast station name from among PS data transmitted from a dynamic PS broadcast station.SOLUTION: Data information transmitted from a broadcast station 101 is decoded into PI, PS, PI(ON), and PS(ON) by an RDS decoder 109, in which PS and PS acquisition count are correlated with each other, and PI(ON) and PS(ON) are correlated with each other, before being stored in a RAM 104. A broadcast station name update processing unit 113 detects, from among the PSs stored in the RAM 104, a PS whose correlated PS acquisition count is greater than or equal to a threshold, and which matches a PS(ON) correlated to a PI(ON) matching the PI of a broadcast station being received, and determines the detected PS to be a broadcast station name.

Description

  The present invention relates to a broadcast receiving apparatus and method for receiving broadcast radio waves in which broadcast information and data information are multiplexed and displaying data information included in the broadcast radio waves accurately.

  In RDS (Radio Data System) defined as the FM radio standard, data information of a broadcast station name (Program Service name; hereinafter abbreviated as PS) is superimposed on broadcast information indicating the contents of a broadcast program. Can be transmitted. On the broadcast receiving side, after detecting broadcast information and data information from the received broadcast radio wave, PS information included in the data information is output and displayed. As a result, information on the broadcast station name of the broadcast station can be displayed on the monitor while the radio broadcast program is being selected.

  In the PS conforming to RDS, it is possible to transmit broadcast station name information of up to 8 characters, and the information of 8 characters is data called group 0A or group 0B including text information of 2 characters. Sent by. That is, by transmitting the data of four groups 0A or group 0B, it is possible to transmit 8-character broadcast station name information.

  Further, the data of the group 0A or the group 0B includes character position information indicating the position of the text corresponding to the two characters, so that the broadcast station name information is arranged and displayed in an appropriate order in the broadcast receiving apparatus. Etc. can be used.

JP 2002-135148 A

  Originally, PS data broadcast in RDS is fixed for each broadcast and should not be changed, but there are many broadcast stations that use it in place of advertisements in the RDS diffusion region in Europe. In those RDS broadcasts, PS data is changed and transmitted at intervals of several seconds.

  Such a transmission method is called dynamic PS, and if the operation of storing the broadcast station name in the memory is performed while receiving such an RDS broadcast, it is not the original correct program service name but one of the advertisement texts. A word or the like may be stored in the memory as a program service name.

  Therefore, when the broadcast station name stored in the memory is later confirmed, words that are completely unrelated to the broadcast station name are displayed meaninglessly, causing confusion for the user. In Patent Document 1, meaningless display is prevented by replacing the broadcast station name stored in the memory with a character string such as a space when dynamic PS is detected. According to the above, even if the correct broadcasting station name is stored in the memory, the broadcasting station name is not displayed, and the correct broadcasting station name is detected and displayed from the PS transmitted by the dynamic PS. No solution is shown.

  The present invention has been made to solve the above-described conventional problems, and detects PS data indicating a correct broadcast station name from PS data transmitted from a dynamic PS broadcast station, and determines the correct broadcast station name. An object of the present invention is to provide a broadcast receiving apparatus and method capable of displaying.

  In order to achieve the above object, the broadcast receiving apparatus according to the first aspect of the present invention provides a broadcast station that is included in the data information from a broadcast radio wave in which program information and data information are multiplexed. Current station broadcast in which the current station identification information indicating the station identification information, a plurality of character information including the broadcast station name of the receiving broadcast station and having different contents included in the data information, and the number of times the character information is acquired are associated with each other Stores station name information, station identification information including a receiving broadcasting station transmitted from another broadcasting station different from the receiving broadcasting station, and other station broadcasting station name information in association with the broadcasting station name information. The broadcast station name of the broadcast station that is receiving the storage unit and the character information included in the current station broadcast station name information that has a certain number of acquisition times or more from the character information included in the current station broadcast station name information. Is extracted as a candidate for the other station and included in the other station broadcasting station name information, Character information that matches broadcast station name information associated with station identification information that matches current receiving station identification information is detected from the broadcast station name candidates of the receiving broadcast station, and the detected character information is received. A broadcast station name update processing unit to be determined as a broadcast station name of the broadcast station in the middle, and a display unit to output and display the broadcast station name determined by the broadcast station name update processing unit .

  The broadcast receiving method according to claim 2 is a plurality of different contents including current station identification information indicating station identification information of a currently receiving broadcast station and broadcast station names of received broadcast stations received within a certain period. Storing the current station broadcast station name information in which the character information and the number of acquisition times of the character information are associated with each other, and the character information of the acquisition number of times or more as a candidate for the broadcast station name of the receiving broadcast station The step of extracting from the current station broadcasting station name information and the station identification information including the receiving broadcasting station transmitted from another broadcasting station different from the receiving broadcasting station and the station name information stored in association with each other A step of searching based on the current station identification information for the name of the currently receiving broadcast station from the station name information, and the broadcast station name candidate that matches the searched broadcast station name as the currently received broadcast station name A step of displaying It is intended to.

  According to the present invention, the broadcast station name of the current receiving station that has been acquired at the time of reception of other stations in advance and the number of times of acquisition is large, from the character information that includes the broadcast station name of the received current receiving station and the content is different. Since the matching character information is determined as the broadcasting station name of the current receiving station, the correct broadcasting station name can be selected and displayed with certainty.

Explanatory drawing which shows the structure of the broadcast receiver in embodiment of this invention Explanatory drawing which shows the data structure of group 0A / 0B of RDS Explanatory diagram showing the data structure of the RDS group 14A Explanatory drawing which shows RAM storage area of PI of RDS Explanatory drawing which shows RAM storage area of PS of RDS and acquisition frequency Explanatory drawing which shows RAM storage area of PI (ON) and PS (ON) of RDS Flow chart showing processing when PS (ON) data is received Flow chart showing processing when PS data is received Flow chart showing processing for determining broadcast station name from received PS data Explanatory drawing which shows the example of RDS data transmitted from a broadcasting station Explanatory drawing which shows the example of PS data transmitted by dynamic PS

  Hereinafter, a broadcast receiving apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the configuration of the broadcast receiving apparatus 100. The broadcast receiving apparatus 100 is used as an in-vehicle FM radio and is mounted on a vehicle together with a speaker 107 and an antenna 102.

  The broadcast receiving apparatus 100 includes a front end 103, an FM demodulation unit 106, an audio amplifier 108, an RDS decoder 109 as a decoding unit, a control unit 112, an operation unit 111, a display unit 110, a ROM 105, and a RAM 104 as a storage unit. Have

  The antenna 102 receives FM radio waves from the broadcasting station 101. On this FM radio wave, program information (radio broadcast audio signal) indicating the content of the radio broadcast program and data information in accordance with the RDS standard are superimposed. Based on a frequency control signal (not shown) from the control unit 112, the front end 103 converts an FM radio wave corresponding to the selected frequency out of FM radio waves received by the antenna 102 into an intermediate frequency signal, and an FM demodulation unit 106 Send to.

  The FM demodulator 106 demodulates the intermediate frequency signal from the front end 103 and separates the demodulated signal into program information and RDS standard data information. Of these pieces of information, the program information is sent to the audio amplifier 108 and amplified, and then sent to a plurality of speakers 107 installed in the vehicle. Thereby, the radio broadcast is output from the speaker 107.

  The RDS decoder 109 decodes the demodulated signal of the data information from the FM demodulator 106 and extracts various information including PS and information called PI, PI (ON), and PS (ON) described later. Information extracted by the RDS decoder 109 is sent to the control unit 112.

  The control unit 112 includes an arithmetic processing unit such as a CPU (Central Processing Unit), and controls the operation of each unit constituting the broadcast receiving apparatus 100. Further, the control unit 112 acquires PI, PS, PI (ON), and PS (ON) included in the data from the RDS decoder 109, associates the PI, PI (ON), and PS (ON) with the RAM 104. In addition, a plurality of PSs acquired in a certain period and having different contents are stored in the RAM 104 in association with the number of PS acquisitions, and the PI, PI (ON), And a broadcast station name update processing unit 113 for determining a broadcast station name from a plurality of types of PS acquired within a certain period based on the PS (ON) information.

  The operation unit 111 is input means such as a touch panel, operation buttons, and a dedicated remote controller installed in the FM radio main body, and is used when a program to be viewed is selected. The display unit 110 is an LCD panel, for example, and outputs and displays information such as the name and frequency of the selected broadcast station.

  The ROM 105 stores a program executed in the control unit 112 and data such as various setting information, and is read out to the control unit 112 when the program is executed. The RAM 104 is used as a temporary storage area for data when the control unit 112 executes predetermined arithmetic processing.

  FIG. 2 shows a data format of an RDS type 0A or type 0B group (hereinafter referred to as “group 0A / 0B”). Note that a data unit conforming to RDS is composed of four blocks, and each block includes an information word and a check word, but the check word is not shown.

  In FIG. 2, the first block (block 1) includes a 2-byte broadcast station identification (PI) code, and the second block (block 2) indicates a group type (in this case, 0A or 0B). A group type code and a PS segment address code for 2 bits are included. The PS segment address code is character position information indicating the position of the transmitted 8-character (4 sets) PS of 2-character (1 set) character information.

  The fourth block (block 4) of group 0A / 0B includes PS information for two characters. For this reason, PS information for 8 characters is transmitted by data of 4 groups 0A or 0B.

  FIG. 3 shows the data format of RDS type 14A. In block 2, information “14A” is written as the group type code. In the group type 14A, information such as PSs of other broadcast stations and transmission frequencies can be transmitted, and FIG. 3 shows a data format when transmitting PSs of other broadcast stations. The end of block 2 includes variant code information indicating what type of information is being transmitted for other broadcast stations. If the upper 2 bits of the variant code are 0, This indicates that the PS information of the broadcasting station is transmitted. In this case, the lower 2 bits indicate the PS (ON) segment address code. The PS (ON) segment address code is character position information indicating the number of 8 characters (4 sets) of PS (ON) in which 2 characters (1 set) of character information are transmitted.

  When the upper 2 bits of the variant code are 0, the third block (block 3) of the group 14A includes PS information of other stations for two characters, and is called PS (ON). The fourth block (block 4) of the group 14A in the case where the upper 2 bits of the variant code are 0 includes the identification code information of the target broadcast station transmitting the PS information in block 3. Called PI (ON).

  Next, the structure of the area of the RAM 104 that stores PI, PS, PI (ON), and PS (ON) information included in the data transmitted from the RDS decoder 109 to the control unit 112 is shown in FIGS. Shown in FIG. 4 shows a current station PI storage memory for storing PI data received by the current receiving station, and stores the PI code of the current receiving station. FIG. 5 is a current station PS storage memory for storing PS data received at the current receiving station and the number of times of acquisition. A plurality of PS data having different contents received within a predetermined period at the current receiving station and acquisition of each PS data. Store the number of times in association with each other. FIG. 6 shows another station PS storage memory for storing PI (ON) data and PS (ON) data received at the current receiving station, and associates PI codes and PS codes of other broadcasting stations different from the current receiving station. Store. The squares shown in FIGS. 4, 5, and 6 indicate storage areas for various information, and examples of specific values of the various information are described in the squares.

  Next, the process of storing the PI (ON) data and PS (ON) data received from the RDS decoder 109 in the other station PS storage memory in the control unit 112 will be described with reference to the flowchart of FIG. The process of FIG. 7 is called whenever the control unit 112 receives PS (ON) two characters at a time from the RDS decoder 109. The received two characters PS (ON) are stored in the RAM, and all eight characters are acquired in s701. If it has been acquired, the process proceeds to s702. In s702, the PI (ON) stored in the block 4 of the group 14A including the PS (ON) received from the RDS decoder 109 is extracted, and whether there is a matching PI (ON) in the other station PS storage memory. If detected, the process proceeds to s703. If not detected, the process proceeds to s704. In s703, the PS (ON) associated with the PI (ON) in the other station PS storage memory detected in s702 is overwritten with the PS (ON) data acquired in s701. In s703, the PI (ON) extracted in s702 and the PS (ON) data acquired in s701 are associated with each other and added to the empty area in the other station PS storage memory.

  Next, a process in which the control unit 112 stores PS data received from the RDS decoder 109 in the current station PS storage memory and periodically updates the broadcast station name will be described with reference to the flowcharts of FIGS. The process of FIG. 8 is called each time PS is received two characters at a time. First, in order to perform the broadcast station name update process every time a certain period of time has elapsed, In order to confirm the elapsed time, it is confirmed whether the monitoring timer has expired (s801). The PS is stored in the RAM every time two characters are received, and if all eight characters are acquired, the process proceeds to the next process (s802). . If the broadcast station name has not been finalized since the start of reception of the broadcast station, the broadcast station name is finalized in the first acquired PS (s807), the current station PS storage memory is initialized, and the monitoring timer is reset. The monitoring timer starts counting (s808). In the initialization processing of the current station PS storage memory, writing to (null) PS in all areas and setting 0 to the number of acquisitions. Next, the acquired PS is stored in the current station PS storage memory, and the acquisition count is incremented. If there is a PS that matches the acquired PS in the current station PS storage memory, the acquisition associated with the corresponding PS is performed. The number of times is incremented (s805), and if there is no PS that matches the acquired PS in the current station PS storage memory, the acquired PS is stored in an empty area in the current station PS storage memory and corresponds to the corresponding PS. The obtained number of acquisitions is incremented (s806). Also, when a certain time has elapsed since the broadcast station name was first confirmed or when the broadcast station name update process was performed last time, and the monitoring timer has expired, the broadcast station name update process described in FIG. To update the broadcast station name (s809). Also, the current station PS storage memory is initialized and the monitoring timer is reset (s810).

  Next, the broadcast station name update process called in s809 of FIG. 8 will be described using the flowchart of FIG. First, in s901, the contents of the current station PS storage memory are confirmed. If a plurality of PSs having different contents are stored in the current station PS storage memory, the receiving broadcast station transmits a dynamic PS. Judge. In the case of a dynamic PS transmission station, a PS whose acquisition count is equal to or greater than a threshold is extracted as a broadcast station name candidate from a plurality of PSs currently stored in the PS storage memory (s902). Next, in s903, it is confirmed whether or not there is a PI (ON) in the other station PS storage memory that matches the PI code of the currently receiving broadcast station stored in the current station PI storage memory. When the PS (ON) associated with the corresponding PI (ON) in the other station PS storage memory is compared with the PS extracted as the broadcast station name candidate in s902, and there is a matching broadcast station name candidate Is determined as a broadcasting station name.

  Hereinafter, the operation of the broadcast receiving apparatus having the above configuration will be described with reference to FIGS. 10 and 11. Broadcast station A and broadcast station B shown in FIG. 10 are different broadcast stations, and it is assumed that broadcast station A transmits broadcast station name “Fun FM” by PS (ON). The broadcasting station B is a broadcasting station that transmits a dynamic PS, and it is assumed that the PS is changed and transmitted in the order shown in FIG. As contents of the dynamic PS of the broadcasting station B shown in FIG. 11, when “enjoy” and “Fun FM” are alternately transmitted seven times, “please”, “access”, “www.”, “Funfm”, “. It is assumed that the advertisement text composed of PS of “com” is transmitted once. Further, as a setting parameter of the process for updating the broadcast station name shown in FIGS. 8 and 9, the time-up threshold value of the monitoring timer that is a time interval for calling the broadcast station name update process referred to in s801 of FIG. The PS transmission pattern shown in FIG. 11 is a value that is received only for one round, and the acquisition frequency condition for extracting a broadcast station name candidate in s902 in FIG. 9 is that the acquisition frequency is 3 or more.

  Hereinafter, processing until the broadcast station name of the broadcast station B is correctly updated will be described. First, broadcast station A is received, and PI (ON): F214 and PS (ON): “FUN FM” are associated and stored in the other station broadcast station name storage memory. Thereafter, when the broadcast station B is received and "enjoy" is received as the first received PS, "enjoy" is determined as the wrong broadcast station name at this time as the broadcast station name. At this point, PS (ON): “FUN FM” has been received from broadcasting station A in advance, but this PS (ON) is data transmitted from another broadcasting station, so there is an error in the content. Since there is a case where the old information is not updated, the broadcast station name of the broadcast station B cannot be determined at this time. Thereafter, PS data is received from the broadcasting station B for a predetermined period, and after the contents of the current station PS storage memory are updated as shown in FIG. 5, the broadcasting station name updating process shown in FIG. Suppose that it was executed. PSs that make up the advertisement text of “please”, “access”, “www.”, “funfm”, “.com” whose number of acquisitions does not satisfy the conditions by the extraction process of the candidate for the station name in s902 is the station name Can be excluded from candidates. However, “enjoy” and “Fun FM”, which are the remaining PSs currently stored in the station PS storage memory, satisfy the conditions for the number of acquisitions. Cannot determine whether the name is correct. Therefore, in s903, a PI (ON) that matches the PI of the current station PI storage memory is detected from the other station PS storage memory, and the detected PI (ON): PS (ON) associated with F214: “FUN By comparing “FM” with the broadcast station name candidate extracted in s902, the matching broadcast station name candidate: “FUN FM” can be updated as the correct broadcast station name.

  In this way, even in the case of dynamic PS, even if the correct broadcast station name cannot be determined only by the number of PS transmissions, it is compared with PS (ON) information received from other broadcast stations in advance, and the broadcast station name By confirming, the broadcast station name can be accurately updated and displayed.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed and modified according to the purpose within the scope described in the claims. is there.

  In the above embodiment, the FM radio device has been described as an example. However, the present invention is not limited to this, and can be applied to other electronic devices such as a mobile phone and a television.

  As described above, the broadcast receiving apparatus according to the present invention compares the broadcast station name information transmitted from other broadcast stations with the broadcast station name information transmitted from the receiving broadcast station within a certain period, and matches. When there is broadcast station name information to be updated, the broadcast station name is updated so that the correct broadcast station name information can be displayed reliably, and is applied to an electronic device such as an FM radio. Can be useful.

DESCRIPTION OF SYMBOLS 100 Broadcast receiving apparatus 101 Broadcast station 102 Antenna 103 Front end 104 RAM
105 ROM
106 FM demodulator 107 Speaker 109 RDS decoder 110 Display unit 111 Operation unit 112 Control unit 113 Broadcast station name update processing unit

Claims (2)

From broadcast radio waves in which program information and data information are multiplexed, current station identification information indicating station identification information of a receiving broadcast station included in the data information,
The current station broadcast station name information that associates the number of times the character information is acquired with a plurality of character information that includes the broadcast station name of the receiving broadcast station and includes different contents, and is included in the data information;
A storage unit for storing station identification information including a receiving broadcast station transmitted from another broadcast station different from the receiving broadcast station, and other station broadcast station name information associated with the broadcast station name information;
Extract text information including a certain number or more of acquisition times included in the current station broadcast station name information from the character information included in the current station broadcast station name information as candidates for the broadcast station name of the receiving broadcast station And the broadcast station name of the broadcast station that is receiving the character information that is included in the other station broadcast station name information and that matches the broadcast station name information associated with the station identification information that matches the current reception station identification information. A broadcasting station name update processing unit that detects the detected character information as a broadcasting station name of the receiving broadcasting station,
A broadcast receiving apparatus comprising: a display unit that outputs and displays a broadcast station name determined by the broadcast station name update processing unit. The current station identification information indicating the station identification information of the currently receiving broadcast station, a plurality of character information having different contents including the broadcast station name of the received broadcast station received within a certain period, and the number of times the character information is acquired Storing the associated current station broadcasting station name information;
Extracting the character information whose number of acquisitions is a certain number or more from the current station broadcasting station name information as a candidate for the broadcasting station name of the receiving broadcasting station;
Broadcast station currently receiving from other station broadcast station name information stored in association with station identification information and broadcast station name information including the broadcast station being received, transmitted from another broadcast station different from the broadcast station being received Searching for a name based on the current station identification information;
A broadcast receiving method comprising: displaying the broadcast station name candidate that matches the searched broadcast station name as the name of the currently receiving broadcast station name.