JP4682804B2 - Broadcast receiving apparatus, broadcast receiving program, and broadcast receiving method - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus that receives a broadcast in which traffic information data is multiplexed, and a broadcast receiving program and a broadcast receiving method suitable for the apparatus.

  Conventionally, an RDS-TMC (traffic message channel) system that provides traffic information to a driver using a part of a channel of RDS (radio data system) using a subcarrier of stereo FM broadcasting is known. Yes. In this system, traffic information as TMC data is included in an 8A type message in the RDS system.

  FIG. 5 is a flowchart showing a process (for example, refer to Patent Document 1) when receiving a broadcast from a broadcast station (hereinafter referred to as “RDS-TMC station”) that provides such traffic information. This process is performed, for example, in a system as shown in FIG. The system includes a navigation unit 1, an RDS-TMC unit 2 connected to the navigation unit 1, and a display 3 connected to the navigation unit 1. The RDS-TMC unit 2 has a function of receiving broadcasts from the RDS-TMC station and acquiring traffic information.

  Before starting the process of FIG. 5, in order to identify the RDS-TMC station that the navigation unit 1 desires to receive, the country code, location information, and service ID values in the RDS data provided by the broadcast are determined. , Specified by the user as a reception condition when receiving the RDS-TMC station. Based on this reception condition, the RDS-TMC unit 2 searches for RDS-TMC stations that match the condition by a seek operation, and obtains a list of RDS-TMC stations that register the obtained RDS-TMC stations (hereinafter referred to as “TMC”). Station list ”). However, when the value of the service ID in the reception condition is “0”, the service ID is excluded from the reception condition, and based on only the country code and location information, RDS-TMC stations that match these values are listed. Will be up.

  When the process of FIG. 5 is started, the RDS-TMC unit 2 first starts reception of any RDS-TMC station in the TMC station list in step 61. Next, in step 62, it is determined whether or not TMC data can be received from the RDS-TMC station. TMC data means 8A group data in RDS data. If it is determined that the TMC data can be received, the TMC data is extracted in step 63 and transmitted to the navigation unit 1. The navigation unit 1 receives this and can display the content of the received TMC data on the display 3.

  Thereafter, the processing in steps 62 to 64 is repeated until it is determined in step 64 that two minutes have elapsed since the start of reception. If it is determined in step 64 that two minutes have elapsed from the start of reception, the TMC station list is updated in step 65 and the process returns to step 61. The update can be performed by a seek operation based on the reception condition, as described above.

  On the other hand, if it is determined in step 62 that TMC data cannot be received, TMC data can be received from the RDS-TMC stations registered in the TMC station list in step 66 after 40 seconds. To find the best RDS-TMC station. Here, the fact that TMC data cannot be received means that the reception state has deteriorated. The best RDS-TMC station means, for example, the one having the best reception sensitivity.

  Next, in step 67, it is determined whether or not an RDS-TMC station capable of receiving TMC data has been searched. If it is determined that the search could not be performed, in steps 68 and 69, an RDS-TMC station that meets the above-described reception conditions is searched by a seek operation. If it is determined in step 69 that an RDS-TMC station meeting the conditions has been detected, reception of the RDS-TMC station is started, and the process returns to step 62. On the other hand, when it is determined in step 67 that an RDS-TMC station capable of receiving TMC data has been searched, reception of the RDS-TMC station is started, and the process returns to step 62.

  According to the above processing, when an RDS-TMC station that meets the reception conditions specified by the user is received, when the TMC data cannot be received, the alternative RDS-TMC station is searched and received. Therefore, TMC data can be continuously received.

JP 2004-159106 A

  However, according to the above-described prior art, when the value of the service ID is “0” in the reception condition, the reception station is replaced with an alternative RDS in response to the reception state being deteriorated so that the TMC data cannot be received. -When switching to a TMC station, the service ID value of the RDS-TMC station that has been received so far may be different from the service ID value of the seek RDS-TMC station. When the service ID in the reception condition is “0”, the service ID is excluded from the reception condition, and any RDS-TMC station having the same country code and location information is targeted for reception and received. Because you get.

  For example, as shown in FIG. 6, when the service ID in the RDS data provided by the receiving RDS-TMC station A is “01”, the RDS-TMC station searched in response to the deterioration of the reception state When reception of B starts, the service ID may be “02”. Thus, when the service ID is different, an error may occur in the provided information. Then, a subtle difference occurs in the traffic information that can be acquired, and the event icon displayed on the display 3 may change based on the traffic information.

  In view of the problems of the prior art, the object of the present invention is to receive an object depending on the deterioration of the reception state when the RDS-TMC station is receiving based on the specified reception condition in the broadcast receiving apparatus. When switching to an alternative RDS-TMC station, the traffic information obtained before and after the switching is prevented from being slightly different.

  In order to achieve the above object, a broadcast receiving apparatus according to a first aspect of the invention broadcasts by multiplexing data constituted by adding predetermined plural types of accompanying data to traffic information data for providing predetermined information. The present invention relates to a broadcast receiving apparatus that receives a predetermined format broadcast and obtains the information. This device selects a broadcast to be received on condition that the value of each associated data matches a predesignated value. At that time, for a specific associated data, the designated value is a predetermined value. The received broadcast selection means to be excluded from the selection condition, and when the traffic information data cannot be received when the first broadcast selected by the received broadcast selection means is received, As an alternative broadcast, there is provided alternative broadcast selection means for selecting a second broadcast in which the value of each associated data including the specific associated data matches that of the first broadcast.

  Here, as the broadcast receiving apparatus, for example, a broadcast receiving apparatus corresponding to RDS or RBDS (Radio Broadcast Data System) is applicable. As the value designated in advance, for example, a value designated by the user for each associated data in the navigation device to which the broadcast receiving device is connected corresponds. When there are a plurality of broadcasts selected or selected as reception targets, for example, a broadcast with the best reception sensitivity is received.

  In this configuration, when the value specified for the specific associated data is not a predetermined value, a broadcast in which all of the values specified for each associated data match is selected as a reception target. On the other hand, if the value specified for the specific associated data is a predetermined value, the specified value for the specific associated data is not matched with the specified value, and the specified values for the other associated data match. In this case, it is selected as a reception target.

  In accordance with such a selection condition, when the first broadcast that meets the selection condition is received and the traffic information data cannot be received due to the deterioration of the reception condition or the like, the second broadcast that is an alternative to the first broadcast Is received so that information based on similar traffic information data can be acquired. At this time, if the specific associated data is similarly excluded from the selection conditions because the specified value for the specific associated data is a predetermined value, the value of the specific associated data is determined between the first broadcast and the second broadcast. May be different.

  Therefore, in the present invention, even if the specific associated data is excluded from the selection conditions, the value of the associated data including the specific associated data matches that of the first broadcast as an alternative broadcast of the first broadcast. The second broadcast is selected to prevent the value of the specific associated data, for example, the value of the service ID, from being different between the first broadcast and the second broadcast.

  According to a second aspect of the present invention, there is provided a broadcast receiving apparatus according to the first aspect, wherein the predetermined format broadcast is performed by multiplexing RDS data including TMC data in accordance with an RDS system, and the traffic information data includes the TMC data. The predetermined plural types of associated data are a country code, location information, and a service ID in RDS data, the specific associated data is a service ID, and the predetermined value is “0”. It is characterized by that.

  In the first or second invention, the broadcast receiving apparatus according to the third invention searches for a broadcast that matches the selection condition by a seek operation, and the predetermined data including a value of specific associated data for each broadcast obtained. Means for creating a compatible broadcast list in which the obtained broadcasts are registered, and the received broadcast selection means selects the received broadcast based on the compatible broadcast list or in the compatible broadcast list. It is performed based on the designation of broadcast by the user.

  In the broadcast receiving apparatus according to the fourth invention, in the third invention, the received broadcast selecting means reads the value of the specific associated data of the selected broadcast from the compatible broadcast list and stores it in a predetermined area when selecting the received broadcast. In selecting the second broadcast, the value stored in the predetermined area is referred to.

  In the third or fourth invention, the broadcast receiving device according to the fifth invention is configured such that the alternative broadcast selection unit searches the compatible broadcast list for a broadcast whose value of the specific associated data matches that of the first broadcast, and obtains the broadcast. The selected broadcast is selected as the second broadcast.

  The broadcast receiving apparatus according to a sixth aspect of the present invention is the broadcast receiving apparatus according to the fifth aspect, wherein the alternative broadcast selecting means includes each associated data including specific associated data when a broadcast that matches the condition is not obtained by searching from the compatible broadcast list A broadcast whose value matches that of the first broadcast is searched by a seek operation, and the obtained broadcast is selected as the second broadcast.

  A broadcast receiving program according to a seventh aspect of the present invention receives a broadcast of a predetermined format for broadcasting by multiplexing data configured by adding predetermined plural types of accompanying data to traffic information data for providing predetermined information. Then, the broadcast reception device computer that acquires the information selects a broadcast to be received on condition that the value of each associated data matches a value designated in advance. If the received value is a predetermined value, the received broadcast information is received when the received broadcast selection procedure excluded from the selection condition and the first broadcast selected by the received broadcast selection procedure are received. When the broadcast cannot be performed, an alternative broadcast selection procedure for selecting a second broadcast in which the value of each associated data including the specific associated data matches that of the first broadcast is performed as an alternative broadcast of the first broadcast. Characterized in that to.

  According to an eighth aspect of the present invention, there is provided a broadcast receiving method for receiving a broadcast in a predetermined format for broadcasting by multiplexing data constituted by adding predetermined plural kinds of accompanying data to traffic information data for providing predetermined information. The broadcast receiving method in the broadcast receiving apparatus for acquiring the information selects a broadcast to be received on condition that the value of each associated data matches a value designated in advance. If the specified value is a predetermined value, the received broadcast selection step excluded from the selection condition and the traffic when the first broadcast selected by the received broadcast selection step is received. When the information data cannot be received, an alternative broadcast selection step of selecting a second broadcast in which the value of each associated data including the specific associated data matches that of the first broadcast as an alternative broadcast of the first broadcast Characterized by including the.

  According to the present invention, as an alternative broadcast of the first broadcast, the values of the specific associated data (for example, service ID) and the other associated data (for example, the country code and location information) match the values of the first broadcast. Therefore, it is possible to prevent inconvenience due to a difference in the value of the specific associated data between the first broadcast and the second broadcast.

  FIG. 1 is a block diagram showing the configuration of a system according to an embodiment of the present invention. As shown in the figure, this system includes a navigation unit 1, an RDS-TMC unit 2 connected to the navigation unit 1 by an RS-422 standard cable, and a display 3 connected to the navigation unit 1.

  The navigation unit 1 has a function of performing guidance along a set route while showing the current position on the displayed map based on information input by the user, map information, a current position acquired by GPS, and the like. I have. In addition to the normal navigation function, as shown in FIG. 2, in order to specify the RDS-TMC station that the user desires to receive, the country code, location information, and service in the RDS data provided by the broadcast are included. The setting of the ID value is accepted as a reception condition of the RDS-TMC station, and the reception condition is sent to the RDS-TMC unit 2 and the contents of TMC data sent from the RDS-TMC unit 2 are displayed. . The country code is included in the PI code in the RDS data. The location information and service ID are defined as type 3A group data in the RDS data.

  The RDS-TMC unit 2 includes a TMC control unit that controls each part of the apparatus, receives FM broadcast in which RDS data is multiplexed, extracts TMC data included in the type 8A group of RDS data, and Has the function to send.

  FIG. 3 is a flowchart showing a part of processing in the TMC control unit. This process is performed when the system power is turned on or the reception condition of the RDS-TMC station is changed. When the processing is started, first, in step 31, the TMC control unit receives notification of the country code, location information, and service ID values specified as reception conditions from the navigation unit 1, as shown in FIG.

  Next, in steps 32 and 33, the TMC controller searches for an RDS-TMC station that meets the reception condition by a seek operation. That is, the RDS-TMC station is received while changing the frequency, and the obtained country code, location information, and service ID values match those specified as reception conditions. To detect. However, when the service ID in the reception condition is “0”, that is, a general service, the search condition does not include the service ID (the service ID in the 3A group data in the RDS data) as in the conventional case, and the country code And a seek operation is performed until an RDS-TMC station that matches only the location information is found.

  If it is determined in step 33 that an RDS-TMC station matching the search condition has been detected, in order to construct a TMC station list that lists RDS-TMC stations that can be received at that time, in steps 34 and 35, The seek operation is continued until a predetermined frequency is reached. Also in this case, when the service ID in the reception condition is “0”, the seek operation is performed without including this condition in the search condition, and RDS-TMC stations that match the search condition are sequentially registered in the TMC station list. . Registration is performed by recording the broadcast station name, reception frequency, reception sensitivity, service ID value, and the like of the RDS-TMC station that matches the search conditions in the TMC station list.

  If it is determined in step 35 that the seek operation has made a round in the predetermined frequency range, the process proceeds to step 36, and it is determined whether there are two or more RDS-TMC stations registered in the TCM station list. As a result, if it is determined that there is only one station, in step 37, reception of the RDS-TMC station is started. If it is determined that there are a plurality of stations, in step 38, reception of the station having the best reception sensitivity among those stations, that is, the station having the highest S meter value at the time of reception is started. Thereafter, the service ID value of the RDS-TMC station that has started reception is read from the TMC station list, stored in a predetermined area so that it can be used as a search condition in subsequent seek operations, and then the steps of FIG. Go to 42.

  The constructed TMC station list is sent to the navigation unit 1, and RDS-TMC stations registered in the TMC station list are listed on the display 3. The user can specify an RDS-TMC station to be received from the displayed list of RDS-TMC stations. If the user designates any RDS-TMC station (step 39), reception of the designated RDS-TMC station is started in step 40, and at the same time, in step 41, the service ID information of the station is changed to TMC. Read from the list, store it in the predetermined area, and proceed to step 42 in FIG.

  In step 42, a timer is started in order to monitor the passage of 2 minutes from the start of reception. In step 43, it is monitored whether TMC data (8A group data in RDS data) can be received from the RDS-TMC station that has started reception. If received, in step 44, only the TMC data portion is extracted from the 8A group data in the RDS data and sent to the navigation unit 1. Further, the count value in the timer is subtracted in step 45, and steps 43 to 46 are repeated until it is determined in step 46 that 2 minutes have elapsed from the start of reception.

  If it is determined in step 46 that 2 minutes have elapsed, in step 47, the TMC station list is updated. Also in this case, as in the case of the construction of the TMC list in the first step 34, if the service ID in the reception condition is “0”, the value of the service ID is not included in the search condition. The reason for this is that if the service ID is added to the search condition, the number of RDS-TMC stations listed in the TMC station list becomes smaller than that in step 34, and the user selects from the TMC station list (step This is because the range of 39) is considered to be narrow. In addition, in consideration of the occurrence of a time during which the reception is interrupted for the seek operation, in the process of one step 47, it is not until one cycle of the predetermined frequency range as in the case of steps 34 and 35. The corresponding TCM list part is updated by performing 1/4 each of the frequency range.

  Thereafter, in step 48, the reception of the RDS-TMC station that has been received until the update process of the TMC station list in step 47 is started is resumed, and then the process returns to step 42, and steps 42 to 48 are repeated.

  During this time, if it is determined in step 43 that TMC data cannot be received, an RDS-TMC station that can replace the RDS-TMC station that has been received is registered in the TMC station list in step 49 after 40 seconds. Search from RDS-TMC stations. In this search, even if the service ID value in the reception condition from the navigation unit 1 is “0”, the service ID value stored in the predetermined area in step 41 is used, and the service matches this value. Search for RDS-TMC station with ID. Thereby, according to this invention, the error of TMC data by the difference in service ID can be prevented. In addition, since all the RDS-TMC stations in the TMC station list have the same country code and location information, if the service IDs match, all the country codes, location information, and service IDs are the same.

  Next, in step 50, it is determined whether or not an RDS-TMC station having a matching service ID has been searched. If it is determined that the search has been completed, reception of the searched RDS-TMC station is started in step 53, and the process returns to step 42. If it is determined in step 50 that an RDS-TMC station having the same service ID cannot be searched, in step 51, an RDS-TCM station that can be substituted for the RDS-TMC station that has been received so far is sought. Search by action. In this search, for the same purpose as in step 49, the service ID value stored in the predetermined area in step 41 is used, and all values of the country code, location information, and service ID are An attempt is made to detect an RDS-TMC station that matches that of the RDS-TMC station that has been received up to.

  Next, in step 52, it is determined whether or not the target RDS-TMC station has been detected. If it is determined that it has been detected, reception of the detected RDS-TMC station is started, and the process returns to step 42. If it is determined that the signal cannot be detected, the seek operation in step 51 is repeated until it can be detected.

  According to the present embodiment, when the TMC data cannot be received, when searching for an alternative RDS-TMC station, the condition that the service ID value is the same as that of the RDS-TMC station that has been received so far is set. Since the search is performed with the addition, it is possible to prevent a slight difference from occurring in the TMC data due to the difference in the service ID.

It is a block diagram which shows the structure of the system which concerns on one Embodiment of this invention. It is a figure which shows a mode that a reception condition is notified to a RDS-TMC unit from a navigation unit in the system of FIG. It is a flowchart which shows a part of process in the TMC control part of a RDS-TMC unit. FIG. 4 is a flowchart showing a continuation of the process of FIG. 3. FIG. It is a flowchart which shows the conventional process at the time of receiving the broadcast from a RDS-TMC station. It is a figure which shows the problem in the conventional process of FIG.

Explanation of symbols

1: Navigation unit, 2: RDS-TMC unit, 3: Display.

Claims (8)

Multiplexes the predetermined traffic information data to the traffic information data for providing constructed by adding a second auxiliary data of the first auxiliary data and the region information according to the service ID for identifying the predetermined traffic information A broadcast receiving device that receives a broadcast in a predetermined format and acquires the information,
A broadcast that matches the selection condition is searched using a selection condition that the value of each associated data matches a value designated in advance by the user, and the value of the first associated data for each obtained broadcast is obtained. Means for creating a compatible broadcast list in which the obtained broadcasts are registered by recording predetermined data including the first accompanying data designated by the user as an arbitrary service ID in advance, A list creation means for creating the compatible broadcast list with a selection condition such that only the value of the second associated data matches a value specified in advance by the user;
Received broadcast selection means for selecting a received broadcast based on the compatible broadcast list or based on a broadcast designation by a user in the compatible broadcast list ;
When the traffic information data cannot be received when the first broadcast selected by the received broadcast selection means is received, the first associated data is selected from the compatible broadcast list as an alternative broadcast of the first broadcast. A broadcast receiving apparatus comprising: alternative broadcast selection means for searching for a broadcast whose value matches the one of the first broadcast and selecting the obtained second broadcast. The alternative broadcast selection means receives the traffic information data when the first broadcast selected by the reception broadcast selection means is selected as an arbitrary service ID and cannot receive the traffic information data. As an alternative broadcast, a broadcast whose value of the first associated data matches that of the first broadcast is searched from the compatible broadcast list, and the obtained second broadcast is selected. Item 2. The broadcast receiving device according to Item 1. When the alternative broadcast selection means finds a broadcast that matches the condition by searching from the compatible broadcast list, the alternative broadcast selection means performs a seek operation on a broadcast whose value of the first associated data matches that of the first broadcast The broadcast receiving apparatus according to claim 1 or 2 , wherein the broadcast obtained by searching is selected as the second broadcast. The broadcast of the predetermined format is to broadcast by multiplexing RDS data including TMC data according to the RDS system,
The traffic information data are those that make up the TMC data,
Any wherein the first auxiliary data is additional data relating to the service ID in the RDS data, of claims 1 to 3 wherein the second auxiliary data is characterized by a concomitant data according to the country code and location information in the RDS data It broadcast receiving apparatus according to any. Predetermined broadcasting by multiplexing predetermined traffic information accompanying the data and the data configured by adding the associated data relating to local information to the traffic information data for providing according to the service ID for identifying the predetermined traffic information In the computer of the broadcast receiving device that receives the format broadcast and obtains the information,
A broadcast that matches the selection condition is searched using a selection condition that the value of each associated data matches a value designated in advance by the user, and the value of the first associated data for each obtained broadcast is obtained. In a procedure for creating a compatible broadcast list in which each obtained broadcast is registered by recording predetermined data including the first accompanying data designated by the user as an arbitrary service ID in advance, A list creation procedure in which the selection condition is a condition in which only the value of the second associated data matches a value specified in advance by the user;
A received broadcast selection procedure for selecting a received broadcast based on the compatible broadcast list or based on a broadcast designation by a user in the compatible broadcast list ;
When the traffic information data cannot be received when the first broadcast selected by the received broadcast selection procedure is received, the first associated data is selected from the compatible broadcast list as an alternative broadcast of the first broadcast. A broadcast receiving program that searches for a broadcast whose value matches the one of the first broadcast and executes an alternative broadcast selection procedure for selecting the obtained second broadcast. In the alternative broadcast selection procedure, when the traffic information data cannot be received when receiving the first broadcast designated by an arbitrary service ID and selected by the received broadcast selection procedure, As an alternative broadcast, a broadcast whose value of the first associated data matches that of the first broadcast is searched from the compatible broadcast list, and the obtained second broadcast is selected. Item 6. The broadcast receiving program according to item 5. Predetermined broadcasting by multiplexing predetermined traffic information accompanying the data and the data configured by adding the associated data relating to local information to the traffic information data for providing according to the service ID for identifying the predetermined traffic information A broadcast receiving method in a broadcast receiving apparatus that receives a broadcast in a format and acquires the information,
A broadcast that matches the selection condition is searched using a selection condition that the value of each associated data matches a value designated in advance by the user, and the value of the first associated data for each obtained broadcast is obtained. In the step of creating a compatible broadcast list in which each of the obtained broadcasts is registered by recording predetermined data including the first accompanying data designated by the user as an arbitrary service ID in advance, A list creation step of creating the compatible broadcast list with selection conditions such that only the value of the second associated data matches a value specified in advance by the user;
A received broadcast selection step of selecting a received broadcast based on the compatible broadcast list or based on designation of a broadcast by a user in the compatible broadcast list ;
When the traffic information data cannot be received when the first broadcast selected in the received broadcast selection step is received, the first associated data is selected from the compatible broadcast list as an alternative broadcast of the first broadcast. A broadcast receiving method comprising: searching for a broadcast whose value matches that of the first broadcast and selecting the obtained second broadcast. In the alternative broadcast selection step, when the traffic information data cannot be received when the first broadcast designated by an arbitrary service ID in the received broadcast selection step is received and the traffic information data cannot be received, the alternative broadcast selection step As an alternative broadcast, a broadcast whose value of the first associated data matches that of the first broadcast is searched from the compatible broadcast list, and the obtained second broadcast is selected. Item 8. The broadcast receiving method according to Item 7.

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