JP5794935B2 - Reception device, reception method, and reception program - Google Patents

Description

  The present invention relates to a receiving apparatus mounted on a vehicle such as a moving body, and more particularly to a radio receiving apparatus capable of receiving a broadcast signal in which data is multiplexed.

  In Europe and the like, a radio data system (Radio Data System, hereinafter referred to as RDS) in which various types of data are multiplexed on a radio broadcast signal is put into practical use. The multiplexed data includes information for identifying the program (PI: Program Identification), information for identifying the genre of the program (PTY: Program Type), information on alternative broadcasting stations, road traffic information by the TMC service, and the like. . The radio receiver displays the name of the broadcast program on the display based on the received data, or creates an alternative broadcast station list to facilitate automatic switching to an alternative broadcast station or automatic follow-up when the vehicle is out of the reception area. (Patent Documents 1 and 2). Furthermore, an RDS receiver that receives road traffic information provided by RDS broadcasting in a short time is also disclosed (Patent Document 3).

Japanese Patent No. 2990187 Japanese Patent No. 3271869 Japanese Patent No. 4578413

  A broadcast station that transmits RDS broadcasts transmits various data that is multiplexed based on the standard, and the radio receiver receives data according to the transmission standard. However, some broadcast stations transmit data that deviates from the standard, and if the radio receiver receives such RDS broadcasts, data reception is normal if the determination condition corresponding to the standard is used. It was not possible to determine that there was, and it was necessary to further analyze whether or not the received data could be handled as normal by performing a data failure analysis or the like after a certain period of time. For example, if it takes time to confirm the reception of road traffic information, a navigation device using this cannot provide road traffic information in a timely manner. Furthermore, if it takes time to receive road traffic information, the processing time of other multiplexed data is shortened, and the processing cannot be executed properly.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a receiving device, a receiving method, and a receiving program that can rapidly receive data superimposed on a broadcast signal.

  The receiving apparatus according to the present invention is capable of receiving a broadcast signal in which data is multiplexed, and includes a receiving means for receiving the broadcast signal, an identification means for identifying data received by the receiving means, Extraction means for extracting specific data from the identified data; determination means for determining whether or not the specific data is normally received based on a determination condition corresponding to a transmission standard of the specific data; A storage means for storing a first deviation table that defines a relationship between a deviation content deviating from the transmission standard and a deviation determination condition corresponding to the deviation content, and the deviation determination condition is searched from the first deviation table. Search means; and change means for changing the determination condition to the deviation determination condition searched by the search means, wherein the determination means is based on the deviation determination condition. It is possible to determine whether it has been received correctly.

  Preferably, the receiving device further includes an extracting means for extracting broadcast station identification information for identifying a broadcast station of the broadcast signal received by the receiving means, and when the broadcast station transmits the specific data deviating from a transmission standard. Storage means for storing a second deviation table that defines a relationship between the deviation contents of the broadcast station and the extracted broadcast station identification information, and the search means refers to the second deviation table and extracts the extraction table. The deviation content corresponding to the broadcast station identification information thus searched is searched, and the deviation determination condition corresponding to the searched deviation content is searched from the first deviation table. Preferably, when the determination unit determines that the specific data is not normally received based on the determination condition, the search unit searches for a departure determination condition. Preferably, the receiving device further includes an updating unit for updating the contents of the second departure table, and the updating unit registers the departure contents searched for in the first departure table in the second departure table. . Preferably, the update means determines the deviation contents of the second deviation table when it is not determined that the specific data has been normally received due to the deviation judgment condition corresponding to the deviation contents of the second deviation table. Change to other deviations. Preferably, when the search means cannot search for the corresponding broadcast station identification information from the second deviation table, the determination means receives the specific data normally based on a determination condition corresponding to a transmission standard. It is determined whether or not. Preferably, the receiving device further includes output means for outputting the specific data when the determination means determines that the specific data has been normally received. Preferably, the receiving device further includes control means for controlling the receiving means, audio output means, and signal processing means, wherein the receiving means has first and second tuners, and the control means includes: The signal processing unit causes the audio signal to be extracted from the signal received by the first tuner, and the audio signal is output from the audio output unit. The control unit receives the signal processing unit by the second tuner. The data is extracted from the extracted signal, and the processing of the other extracted data is executed while the specific data is extracted. Preferably, the receiving means receives an RDS broadcast signal, and the specific data is TMC data included in the RDS data.

  A system according to the present invention includes a receiving device having the above characteristics and a navigation device capable of communicating with the receiving device, and the receiving device receives road traffic information multiplexed in a broadcast signal. Provide to navigation devices.

  A receiving program according to the present invention is a program executed by a receiving device capable of receiving a broadcast signal in which data is multiplexed, the receiving means receiving the broadcast signal, and the data received by the receiving means. Identification means for identifying, extraction means for extracting specific data from the identified data, and determining whether the specific data is normally received based on a determination condition corresponding to a transmission standard of the specific data Determination means for searching, a search means for searching for a deviation determination condition from a first deviation table defining a relationship between a deviation content deviating from the transmission standard and a deviation determination condition corresponding to the deviation content, and the determination condition And changing means for changing to the deviation determination condition searched by the search means, wherein the determination means is that the specific data is normally based on the deviation determination condition It is possible to determine whether or not a signal. Preferably, the reception program further includes extraction means for extracting broadcast station identification information for identifying a broadcast station of the broadcast signal received by the reception means, and the search means is configured so that the broadcast station deviates from the transmission standard for the specific data. A second deviation table that defines the relationship between the deviation contents when the transmission information is transmitted and the extracted broadcast station identification information, searches for deviation contents corresponding to the extracted broadcast station identification information, and A deviation determination condition corresponding to the retrieved deviation content is retrieved from the first deviation table.

  A receiving method according to the present invention is a receiving apparatus capable of receiving a broadcast signal in which data is multiplexed, the step of receiving the broadcast signal, the step of identifying the received data, and the identification Extracting specific data from the generated data, determining whether or not the specific data is normally received based on a determination condition corresponding to the transmission standard of the specific data, and deviating from the transmission standard A step of retrieving a deviation determination condition from a first deviation table that defines a relationship between the deviation content and the deviation determination condition corresponding to the deviation content, and the deviation determination condition searched by the search means for the determination condition And a step of re-determining whether or not the specific data is normally received based on the deviation determination condition. Preferably, the reception method further includes a step of extracting broadcast station identification information for identifying a broadcast station of the received broadcast signal, and a deviation content when the broadcast station transmits the specific data deviating from a transmission standard. A step of searching for a deviation content corresponding to the extracted broadcast station identification information with reference to a second deviation table that defines a relationship with the extracted broadcast station identification information, and corresponding to the searched deviation content And a step of retrieving from the first deviation table a deviation determination condition to be performed.

  According to the present invention, the deviation contents can be searched with reference to the first deviation table, so that it is possible to quickly confirm reception of specific data. Furthermore, according to the present invention, the deviation content can be searched at high speed by referring to the second deviation table that defines the relationship between the deviation content and the receiving broadcast station.

FIG. 1A is a diagram illustrating an example of an in-vehicle electronic system according to an embodiment of the present invention, and FIG. 1B is a block diagram illustrating a configuration of a radio receiving apparatus according to the embodiment of the present invention. It is a block diagram which shows a part of function contained in the signal processing part and control part which are shown to FIG. 1 (B). 3A shows an example in which TMC data is transmitted in accordance with the GAP3 standard, and FIG. 3B shows an example in which TMC data is transmitted outside the transmission standard. It is an example of the deviation process table used in 1st Example of this invention. It is a flowchart explaining the reception operation | movement of the TMC data in the radio receiver which concerns on 1st Example of this invention. It is a block diagram which shows a part of function contained in the signal processing part and control part which concern on 2nd Example of this invention. It is an example of the deviation code table used in the 2nd Example of this invention. It is a flowchart explaining the reception operation | movement of TMC data in the radio receiver which concerns on 2nd Example of this invention. It is a figure explaining the reception example of TMC data by the Example of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. A preferred embodiment of the present invention exemplifies a radio receiving device mounted on an automobile as a moving body. In addition, the radio reception apparatus can receive a radio broadcast in which data is multiplexed. Here, as an example, the radio reception apparatus receives an RDS broadcast.

  FIG. 1A is a diagram illustrating a configuration of an in-vehicle electronic system according to an embodiment of the present invention. The on-vehicle electronic system 10 includes a radio receiver 20 mounted on a vehicle and a navigation device 30. The radio receiver 20 receives a radio broadcast selected by the user, and road traffic information included in data superimposed on the radio broadcast is provided to the navigation device 30. In RDS broadcasting, digital message (RDS data) is superimposed on an analog FM broadcast signal, and a TMC (Traffic Message Channel) service that distributes road traffic information using the RDS data has become widespread. This road traffic information is organized for each country, region, and road. Here, the road traffic information provided by the TMC service is referred to as TMC data for convenience.

  The TMC data acquired by the radio receiver 20 is provided to the navigation device 30. The navigation device 30 decodes the TMC data, displays road traffic information on a road map, and provides voice guidance. For example, the navigation device 30 notifies the radio reception device 20 of position information such as the vehicle position and / or the destination, and the radio reception device 20 transmits TMC data corresponding to the position information to the navigation device 30. it can. For example, the TMC data corresponding to the position information can be selected with reference to the PI code or country code of the RDS data. An in-vehicle electronic system 10 shown in FIG. 1A represents one configuration example, and includes a television receiver, a DVD / Blu-ray disc playback device, a multi-function terminal (smartphone), and the like. May be.

  FIG. 1B is a block diagram illustrating a configuration of the radio receiving apparatus according to the present embodiment. The radio receiver 20 includes a first tuner 110A, a second antenna 100B, and a second antenna that receive a broadcast signal of a selected broadcasting station (frequency) via the first antenna 100A and the first antenna 100A. Receives received signals from the second tuner 110B that receives the broadcast signal of the selected broadcast station (frequency) via 110B, and the first and second tuners 110A and 110B, and performs necessary processing on each received signal. The signal processing unit 120, the amplifier 130 that amplifies the audio signal processed by the signal processing unit 120, the speaker 132 that outputs the audio signal amplified by the amplifier 130, the data decoded by the signal processing unit 120, and the like can be displayed Display unit 140, storage unit 150, input unit 160 that receives input from the user, navigation device 30 includes an interface (I / F) unit 170 that enables connection with an external device such as 30, first and second tuners 110 </ b> A and 110 </ b> B, a signal processing unit 120, an amplifier 130, and the like. Is done.

  As is well known, the first tuner 110A receives an RF signal from the antenna 100A, an RF amplifier that amplifies the RF signal, a tuning circuit that selects a frequency signal of a desired station from the amplified RF signal, and a frequency from a local oscillator. It includes a mixer that mixes the signal and the RF signal to generate an intermediate frequency (IF) signal, an S meter circuit that DC-detects the intermediate frequency signal and extracts a received electric field strength signal (S meter signal), and the like. Further, the first tuner 110 </ b> A converts the intermediate frequency signal (IF) and the S meter signal into digital signals by an ADC (analog / digital converter), and outputs them to the signal processing unit 120 and the control unit 180. The second tuner 110B is also configured similarly to the first tuner 110A. The first and second tuners 110 </ b> A and 110 </ b> B can select the same broadcast station or different broadcast stations in accordance with an instruction from the control unit 180.

  The signal processing unit 120 is configured using, for example, a DSP (Digital Signal Processor). The signal processing unit 120 can perform signal processing such as FFT, digital filtering, signal synchronization, time / frequency deinterleaving, audio decoding, data decoding, and phase diversity. These signal processes can be controlled using software stored in a program memory in the signal processing unit 120. In a preferred aspect of the present embodiment, the signal processing unit 120 includes a DAC (digital / analog converter), extracts an audio signal from the digital signal received by the first tuner 110A, and converts it into an analog signal. Provided to the amplifier 130. The signal processing unit 120 also extracts RDS data from the signal received from the second tuner 110B, and executes various processes on the RDS data. For example, TMC data is extracted from RDS data and transmitted to the navigation device 30, or an alternative broadcast station list is created from information on alternative broadcast stations transmitted between the TMC data.

  The control unit 180 is composed of, for example, a microcontroller and controls each unit by executing a program stored in a memory. In a preferred mode of operation, the control unit 180 extracts the audio signal from the signal received by the first tuner 110A to the signal processing unit 120 in order to acquire the radio broadcast audio signal using the first tuner 110A. Let In addition, in order to acquire RDS data using the second tuner 110B, the control unit 180 causes the signal processing unit 120 to extract RDS data from the signal received by the second tuner 110B. Thus, the control unit 180 extracts the TMC data from the extracted RDS data and outputs the TMC data to the navigation device 30 or the data of the alternative broadcasting station of the broadcasting station received by the first tuner 110A. Extracted from the RDS data, an alternative broadcast station list is created based on the extracted data and stored in the storage unit 150. The alternative broadcast station list is used when the sensitivity of the S meter from the first and second tuners 110A and 110B decreases.

  FIG. 2 shows a configuration related to reception of TMC data by the signal processing unit 120 and the control unit 180. The signal processing unit 120 includes an RDS decoder 200 that decodes the digital signal received from the second tuner 110B, a data block identification unit 210 that identifies data blocks included in the RDS data stream DS extracted by the RDS decoder 200, A TMC data extraction unit 220 that extracts TMC data from a data block having TMC data based on the identification result of the data block identification unit 210, and a TMC data holding unit 230 that holds the extracted TMC data are included.

  Preferably, the TMC data extraction unit 220 and the TMC data holding unit 230 are controlled in operation based on the determination signal S representing the determination result from the reception determination unit 250, and when the determination signal S needs to be determined, When “1” is represented and determination is not necessary, the logic “0” is represented. The time when the determination is necessary is, for example, when the TMC data is first received when the radio receiver is turned on, or when the channel of the broadcasting station is changed. The time when the determination is unnecessary is when the reception determination unit 250 has already performed the determination of normal reception. When it is notified by the determination signal S that the determination is unnecessary, the TMC data extraction unit 220 extracts the TMC data from the RDS data, and the TMC data holding unit 230 provides the extracted TMC data to the TMC data output unit 260. Then, TMC data is output to the navigation device 30. On the other hand, when notified by the determination signal S that the determination is necessary, the TMC data extraction unit 220 extracts sufficient TMC data to determine the transmission standard of the TMC data. For example, it is not necessary to extract all of the TMC data, only the identification information given to the header of the TMC data is extracted, and the road traffic information included in the main body of the TMC data is not extracted. The TMC data holding unit 230 is configured by a FIFO-structured memory, holds the extracted TMC data for a certain period or a certain amount of TMC data, and provides this to the TMC data comparison unit 240.

  On the other hand, the control unit 180 receives TMC data necessary for transmission standard determination from the TMC data holding unit 230, and compares the comparison results of the extracted TMC data with the comparison unit 240 and the TMC data comparison unit 240. A TMC data output unit 260 that outputs TMC data based on a determination result of the reception determination unit 250, and a reception determination unit 250 that determines whether the TMC data is received so as to satisfy a determination condition corresponding to the transmission standard. A determination condition search unit 270 that, when deviating from the transmission standard, searches for a determination condition at the time of departure with reference to the deviation processing table 280 and provides the determination condition to the reception determination unit 250. The configuration shown in FIG. 2 is an example, and either the signal processing unit 120 or the control unit 180 may realize the configuration shown in FIG.

  Next, a specific TMC data receiving operation will be described. The TMC data included in the RDS data superimposed on the RDS broadcast is transmitted according to the transmission standard. That is, the broadcast station on the transmission side transmits TMC data in accordance with the transmission standard, and the radio reception device 20 on the reception side determines whether the TMC data has been normally received under the determination condition determined based on the transmission rule. Designed to determine whether. Therefore, in this embodiment, if the reception of the TMC data does not satisfy the determination condition, the broadcasting station estimates that the TMC data is transmitted out of the transmission standard, and the determination condition according to the content of the deviation is set. It is possible to determine whether or not the TMC data has been normally received.

  FIG. 3 shows an example of a TMC data transmission standard, and FIG. 3A shows a GAP3 transmission standard. The RDS data stream DS extracted by the RDS decoder 200 is a collection of a series of a plurality of data groups or data blocks. In this RDS data stream, a data group having identification information of 8A is periodically included, and TMC data is included in this 8A group (hereinafter referred to as “8A”). In the GAP3 transmission standard, “8A” including the same TMC data is transmitted three times, and three data groups exist between “8A” and “8A”. As shown in FIG. 3A, the first three “8A” contains the same road traffic information, and the next three “8A” contain another same road traffic information. “8A” including two identical TMC data is intermittently and continuously included in the RDS data stream.

  If the transmission standard is GAP5, the same data “8A” is transmitted three times, but unlike GAP3, there are five data groups between “8A” and “8A”. If there are, there are 8 data groups in between, and if it is GAP11, 11 data groups exist in between. In any case of GAP3 to GAP11, “8A” including the same data is transmitted three times, and information identifying which transmission standard is used to transmit TMC data is other data in the RDS data stream. Included in the group. When TMC data is transmitted in such a transmission standard, the radio reception device 20 of the present embodiment determines that TMC data has been normally received if “8A” received twice is the same data. The determination condition is that the third “8A” is discarded.

  Referring to FIG. 2 again, the RDS decoder 200 of the signal processing unit 120 extracts the RDS data stream DS shown in FIG. 3, and the data block identification unit 210 decodes the header information of the data block included in the data stream DS. To identify each data block. The TMC data extraction unit 220 extracts the “8A” data block corresponding to the TMC data from the identified data blocks, and the TMC data holding unit 230 sequentially holds the extracted “8A” TMC data. .

  The determination condition search unit 270 can know the TMC data transmission standard (for example, GAP3, GAP5, etc.) from the information of the data group corresponding to, for example, “3A” identified by the data block identification unit 210. A determination condition corresponding to the transmission standard is provided to the reception determination unit 250. Alternatively, the reception determination unit 250 may directly fetch the determination condition corresponding to the transmission standard from the data block identification unit 210 without going through the determination condition search unit 270. The TMC data comparison unit 240 compares the TMC data sequentially held by the TMC data holding unit 230 and notifies the reception determination unit 250 of the number of “8A” that is the same data, the number of extractions of “8A”, and the like. The reception determination unit 250 determines whether “8A” has been received three times and the same “8A” has been received twice according to the determination condition corresponding to the transmission standard, and if the determination condition is satisfied, It is determined that the reception of the TMC data is normal, and a determination signal S representing the determination result is notified to the TMC data extraction unit 220, the TMC data holding unit 230, and the TMC data output unit 260. The TMC data output unit 260 outputs the TMC data to the navigation device 30 based on the determination result that the reception is normal.

  In the signal processing unit 120 and the control unit 180, the timing for receiving the TMC data is known according to the transmission standard (GAP3, GAP5, etc.), and the period during which the TMC data is not received is from other processes, for example, RDS Can be assigned to the extraction of alternative broadcast stations and the creation of a list thereof. In other words, the reception process of TMC data must be performed within a certain time so that a sufficient period for processing other data can be secured. Further, as will be described later, when the broadcast station side deviates from the transmission standard and transmits TMC data, the determination condition search unit 270 refers to the deviation processing table and uses the determination condition according to the deviated content. This makes it possible to confirm reception of TMC data.

  Some RDS broadcast stations transmit TMC data outside the transmission standard. In particular, broadcasting stations that provide TMC services for free tend to do so. As described above, if TMC data is transmitted outside the transmission standard, the reception determination unit 250 determines that the TMC data is not normally received because the determination condition is not satisfied, and the conventional radio In the receiving apparatus, a routine for analyzing a failure in data communication is executed. Since this failure analysis requires a certain time, the navigation device cannot receive TMC data, and the reflection speed of road traffic information is delayed. In particular, the failure analysis time depends on the GAP. For example, in the case of GAP11, the time period between “8A” is 1100 msec or more, and it is about 30 seconds at the maximum to determine that the transmission standard deviates. Cost. When the transmission standard is determined to be a deviation, other processes that should be executed between the GAPs in order to search for the cause of the deviation are stopped.

  In the present embodiment, when the RDS broadcasting station deviates from the transmission standard, a deviation processing table that defines the relationship between the deviating contents and the corresponding implementation processing (that is, including the judgment condition at the time of deviation) is stored. Even if the TMC data is stored in the unit 150 and deviates from the transmission standard, normal reception confirmation of the TMC data can be performed at high speed. Preferably, the departure processing table is stored in a rewritable nonvolatile memory.

  FIG. 4 is a diagram illustrating an example of the departure processing table. As shown in FIG. 4, the deviation processing table shows the relationship between the deviation contents from the transmission standard, the deviation code obtained by coding the deviation contents, and the processing executed according to the deviation contents (including judgment conditions at the time of deviation). It prescribes. For example, when the TMC data (“8A” shown in FIG. 3) cannot be extracted from the RDS broadcasting station, the deviation contents without the TMC data contents are obtained, and this is represented by the deviation code “0”. If there is such a deviation, the control unit 180 causes the second tuner 110B to receive the next candidate station. In the GAP3 standard, in the case of deviation contents where the number of transmissions of “8A” is one from the broadcasting station (the same TMC data is transmitted only once and the other two are different TMC data), The deviation code is represented by “1”, and the process to be executed is confirmed by reading “8A” once. Since this corresponds to a determination condition at the time of departure, the determination condition search unit 270 illustrated in FIG. 2 searches for a determination condition corresponding to the content of the departure and notifies the reception determination unit 250 of this determination condition. In the case of deviation contents in which the number of transmissions of “8A” is two from the broadcast station, the same TMC data is transmitted only twice, the other is different TMC data, and this deviation code is represented by “2”. Is done. If the content of the deviation is “8A” transmitted from the broadcasting station four times or more, it is represented by the deviation code “3”. In this case, it is considered that there is an abnormality in transmission, and the reception is received by other broadcasting stations. Switching processing is performed. “Regular GAP number deviation: 3” is a deviation in which the number of other data groups during “8A” is 3, even though it is not GAP3 (eg, GAP5). This deviation code is “13”. The process to be expressed and executed is corrected with the number of GAPs = 3. This determination condition is also notified to the reception determination unit 250, and at the same time, the signal processing unit 120 can acquire TMC data at a timing according to GAP3 and allocate a period other than this to other processing. The departure processing table is prepared in the memory in advance, and reflects the deviation contents of the RDS broadcast station when the vehicle actually travels. However, the deviation shown in FIG. 4 is an example.

  Next, the TMC data receiving operation of the radio receiving apparatus according to the present embodiment will be described with reference to the flowchart of FIG. First, the in-vehicle electronic system 10 shown in FIG. 1A is activated (S101). Next, in a preferred embodiment, the destination is set in the navigation device 20 (S102), and the navigation device 30 notifies the radio receiver 20 of position information such as the vehicle position, the destination, the waypoint, and route information. However, if the destination is not set, the vehicle position information is notified.

  The radio receiver 20 receives the RDS broadcast selected by the user (S103). The signal processing unit 120 decodes the digital signal received from the first tuner, extracts the digital audio signal from the digital signal, converts the audio signal into an analog signal, and outputs the analog signal from the speaker 132. On the other hand, the digital signal received from the second tuner is decoded by the RDS decoder 200, an RDS data stream DS is generated, and TMC data is extracted by the TMC data extraction unit 220 (S104). At this time, since the transmission standard of the TMC data superimposed on the RDS broadcast is not determined, the signal S indicating that the determination from the reception determination unit 250 is necessary is the TMC data extraction unit 220, the TMC data holding unit 230, and the TMC. The data output unit 260 is notified. The extracted TMC data is sequentially held in the TMC data holding unit 230, and then the TMC data comparison unit 240 checks the number of transmissions and the number of the same data.

  Next, the reception determination unit 250 receives the comparison result of the TMC data comparison unit 240, and determines whether or not TMC data is received under the determination condition according to the transmission standard of TMC data. The reception determination unit 250 determines that the TMC data is normally received if the determination condition is met, and otherwise determines that the TMC data cannot be normally received (S106). As described above, if the standard is such that three pairs of TMC data are transmitted, the determination condition is that if the same TMC data among the three TMC data can be received twice, it is determined as normal reception, and 3 Discard the first TMC data. If the same TMC data cannot be received twice, or if the number of data specified by GAP and the number of data included in the actual TMC data do not match, it cannot be determined that the data is received normally. Is determined to have deviated from the transmission standard.

  When it is determined that the data has been normally received, the TMC data output unit 260 transmits related TMC data to the navigation device 30 (S107). The navigation device 30 displays road traffic information (for example, an icon or a message indicating traffic jam, traffic closure, etc.) on the road map screen based on the received TMC data, and outputs the road traffic information by voice (S108).

  On the other hand, when it is determined that the reception is not normal, that is, when it is determined that the transmission standard deviates, the determination condition search unit 270 transmits the TMC data transmission standard obtained from the data block identification unit 210 (for example, GAP3, GAP5, etc.), the TMC data extraction status and the determination result of the reception determination unit 250 are acquired, and these information and the deviation processing table shown in FIG. 4 are collated to determine the corresponding deviation contents. For example, if “8A”, which is TMC data, cannot be received even once, it is determined that it corresponds to the deviation code “0”. When the transmission standard is GAP3 and the same “8A” can be received only once, it is determined that it corresponds to the deviation code “1”. In other words, in the case of GAP3, there are three data groups between “8A” and “8A”, and only one “8A” is transmitted within the period when “8A” is transmitted three times. It is. When the same “8A” can be received only twice, it is determined that it corresponds to the departure code “2”. This is a case where the same data is received only twice within a period in which “8A” is transmitted three times. When “8A” is received four or more times, it is determined that the deviation code “3” is applicable. This is a case where the same data is continuously received four times or more. The same applies to other transmission rules GAP5, GAP8, and GAP11. When the transmission standard is other than GAP3 and the number of data groups between “8A” is 3, it is determined that the deviation code is “13”. Corresponding to deviation code “14”, “15” or “16” depending on the number of data groups between “8A” as other cases where the number of GAPs in the transmission standard and the number of data groups actually included do not match Then, it may be determined. Finally, when it does not correspond to any deviation contents of the deviation codes “0” to “16”, it is determined that the deviation code is “17”.

  In this way, the determination condition search unit 270 refers to the departure processing table and searches for “processing to be performed” corresponding to the departure content. This process includes a transition to reception to the next candidate station and a change in the determination condition. If the “execution process” relates to a change in the determination condition, the determination condition search unit 270 determines whether the determination condition is received. The reception determination unit 250 changes the determination condition to the determination condition at the time of departure (S110). Next, the control unit 180 determines whether or not the deviation contents correspond to reception of other candidate stations, that is, deviation codes “0”, “3”, “6”, “9”, “12”, “17”. It is determined whether it corresponds to either of these (S111). If it does not correspond to reception of another candidate station, it is re-determined whether or not the TMC data transmitted next is normally received under the changed determination condition (S106). On the other hand, when receiving another candidate station, the control unit 180 causes the second tuner 110B to select another RDS broadcast station (S112), and from the RDS data transmitted by the broadcast station, TMC data is received. Extraction is performed and reception determination similar to the above is performed. Other broadcasting stations seek RDS broadcasting stations with good reception sensitivity, or select from RDS broadcasting stations included in the alternative broadcasting station list.

  In the conventional radio receiving apparatus, if the reception of TMC data does not satisfy the determination condition corresponding to the transmission standard, it takes a long time to analyze the communication failure and determine that it deviates from the transmission standard. Further, even if other RDS broadcast stations are received without being able to solve the obstacle, it takes a long time, and as a result, the reflection speed of the road traffic information in the navigation device is delayed. On the other hand, in this embodiment, a departure processing table is prepared in advance, and when the reception of TMC data does not satisfy the determination condition corresponding to the transmission standard, the departure content is determined with reference to the departure processing table, Since the determination condition corresponding to the content of the deviation is searched and the determination condition is used to re-determine whether the reception of the TMC data is normal or not, even if there is a deviation in the transmission standard, TMC data can be quickly retrieved without requiring a long time to analyze a communication failure. Further, it is determined whether or not the transmission standard is deviated when the RDS broadcasting station is first received, and if the deviation is detected, whether or not the reception of TMC data is normal based on the determination condition corresponding to the deviation thereafter. Therefore, extraction of TMC data becomes fast and easy. Thereby, TMC data can be promptly provided from the radio receiver to the navigation device.

  Next, a second embodiment of the present invention will be described. The radio receiver 20 according to the second embodiment has a learning function so that an RDS broadcasting station can be searched at a high speed for deviation from the transmission standard. FIG. 6 is a functional block diagram of the signal processing unit 120 and the control unit 180 of the second embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals. The RDS broadcast station transmits a program identification code (Program Identification, hereinafter referred to as PI code) composed of a country code and a broadcast station code. This PI code is used, for example, when automatically following a broadcasting station having the same program content. In the second embodiment, the signal processing unit 120 includes a PI code extraction unit 300 that extracts a PI code from the RDS data stream DS, and the extracted PI code is provided to the determination condition search unit 270.

  The determination condition search unit 270 refers to the deviation code table 310 based on the PI code, and checks whether the PI code being received has deviated from the transmission standard in the past. FIG. 7 shows an example of the deviation code table. The departure code table defines the relationship between the PI code and the departure code, and is preferably stored in the nonvolatile memory of the storage unit 150. Furthermore, the control unit 180 includes a departure code table update unit 320 that adds, modifies, and changes the contents of the departure code table 310.

  In the deviation code table 310, known deviation data (PI code / deviation code) is registered in the initial state before shipment. When a new deviation is found during actual driving, it is sequentially registered in the deviation code table. However, in the initial state, nothing is registered in the deviation code table 310. After that, when the receiving RDS broadcasting station deviates from the transmission standard, it is sequentially registered and updated in the deviation code table. Good.

  Next, the operation according to the second embodiment of the present invention will be described with reference to the flowchart of FIG. First, the selected RDS broadcast is received (S201), and the PI code is extracted (S202). Next, the determination condition search unit 270 refers to the departure code table 310 (S203), checks whether or not the PI code is registered (S204), and if the PI code is registered, the corresponding departure code. Is extracted (S205), and the execution process corresponding to the departure code is searched with reference to the departure processing table 280 (S206). Next, the determination condition is changed according to the implementation process (S207), and the determination by the reception determination unit 250 is performed based on the changed determination condition (S208). If it is determined that the TMC data is normally received, the TMC data is transmitted to the navigation device (S209), processing based on the TMC data is performed in the navigation device, and road traffic information and the like are displayed on the road map. (S210).

  On the other hand, when the PI code is not registered in the deviation code table (S204), the reception determination unit 250 performs reception determination under the transmission standard determination conditions (S211), and is determined not to be received normally. In the case, the deviation processing table is referred to in the same manner as in the first embodiment, the deviation contents are searched (S213), and the judgment condition is changed based on the execution process corresponding to the deviation contents (S214). The data reception state is re-determined (S215). If it is determined that the reception is normal, the PI code and the departure code are newly registered in the departure code table 310 (S216), and the processes of steps S209 and S210 are performed. In the second embodiment, by using the learning effect using the deviation code table, it is possible to perform reception determination according to the contents of the deviation more quickly than in the first embodiment.

  FIG. 9 is a diagram for explaining an example of the learning effect of this embodiment. In the figure, taking as an example a case where a route R from a city A to a city B is frequently moved, the navigation device 30 needs road traffic information of the city A and the city B. As shown in FIG. 3A, TMC data “8A” for city A, TMC data “8A” for city B, and TMC data “8A” for other cities are continuously transmitted as RDS data. . The navigation device 30 may notify the location information of the cities A and B, and the radio reception device 20 may filter the TMC data so that the radio reception device 20 transmits the TMC data regarding the cities A and B. Alternatively, the navigation device 30 may filter the TMC data transmitted from the radio reception device 20 to extract the TMC data regarding the cities A and B.

  It is assumed that the city A, the city B, and the route R are within the reception area of the broadcast station X, and the broadcast station X transmits TMC data outside the transmission standard. When the own vehicle travels from city A to city B for the first time, PI code (A221) of broadcasting station X and its departure code are not registered in departure code table 310. Therefore, referring to the deviation processing table 280, the deviation contents of the broadcasting station X are determined from the reception mode of the TMC data, and the deviation code “2” representing the PI code (A221) and the deviation contents is the deviation code table. 310 is registered. Again, when the vehicle travels on the route R between the city A and the city B, the PI code (A221) of the broadcasting station X is registered in the departure code table 310, so that the departure from the departure processing table of FIG. It becomes easy to search for the contents and processing corresponding to the contents, and it is possible to immediately confirm reception of TMC data according to the deviation contents.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the present invention described in the claims. Deformation / change is possible. In the above embodiment, the radio receiver that receives the RDS broadcast is exemplified. However, as long as the data can be multiplexed, the radio receiver is not limited to the RDS broadcast but may be another radio broadcast. Moreover, not only analog radio broadcasting but also digital radio broadcasting may be used. Furthermore, in the above embodiment, a radio receiver having two digital tuners has been illustrated. However, the tuner may output an analog signal, and the number of tuners is not particularly limited, and a single tuner can be used as a broadcast signal. May be used in time division for receiving and extracting data, or may have three or more tuners, and any of them may be used for extracting RDS signals.

10: On-vehicle electronic system 20: Radio receiver 30: Navigation device 100A, 100B: Antennas 110A, 110B: Tuner 120: Signal processing unit 130: Amplifier 132: Speaker 140: Display unit 150: Storage unit 160: Input unit 170: Interface unit 180: Control unit 200: RDS decoder 210: Data block identification unit 220: TMC data extraction unit 230: TMC data holding unit 240: TMC data comparison unit 250: Reception determination unit 260: TMC data output unit 270: Determination condition Search unit 280: Deviation processing table 300: PI code extraction unit 310: Deviation code table 320: Deviation code table update unit

Claims (19)

A receiving device capable of receiving a broadcast signal in which data is multiplexed,
Receiving means for receiving the broadcast signal;
Identifying means for identifying data received by the receiving means;
Extraction means for extracting specific data from the identified data;
Determining means for determining whether or not the specific data is normally received based on a determination condition corresponding to the transmission standard of the specific data;
Storage means for storing a first deviation table that defines a relationship between deviation contents deviating from the transmission standard and deviation determination conditions corresponding to the deviation contents;
Extracting means for extracting broadcast station identification information for identifying a broadcast station of the broadcast signal received by the receiving means;
Storage means for storing a second deviation table that defines a relationship between the content of deviation when the broadcast station transmits the specific data deviating from the transmission standard and the extracted broadcast station identification information;
Referring to the second deviation table, the deviation content corresponding to the extracted broadcasting station identification information is searched, and the deviation determination condition corresponding to the searched deviation content is searched from the first deviation table. Search means;
Changing means for changing the determination condition to the deviation determination condition searched by the search means;
The receiving device is capable of determining whether or not the specific data is normally received based on the deviation determination condition. The receiving device according to claim 1, wherein when the determination unit determines that the specific data is not normally received based on a determination condition, the search unit searches for a deviation determination condition. The receiving device further includes an updating unit that updates contents of the second deviation table, and the updating unit registers the deviation contents searched in the first deviation table in the second deviation table. Item 4. The receiving device according to Item 1 . If the update means does not determine that the specific data has been normally received due to a deviation determination condition corresponding to the deviation content of the second deviation table, the update means changes the deviation content of the second deviation table to another The receiving device according to claim 3 , wherein the receiving device is changed to a deviation content. When the search means cannot search for the corresponding broadcast station identification information from the second deviation table, the determination means determines whether the specific data has been normally received based on a determination condition corresponding to a transmission standard. The receiving device according to claim 1 , wherein: Receiving apparatus further includes the when said particular data is determined to have been normally received by the determination means includes output means for outputting the specific data, the receiving apparatus according to 5 any one claims 1 . The receiving apparatus further includes control means for controlling the receiving means, audio output means, and signal processing means, and the receiving means has first and second tuners,
The control means causes the signal processing means to extract an audio signal from the signal received by the first tuner, and causes the audio output means to output the audio signal;
The control means causes the signal processing means to extract data from a signal received by a second tuner, and to execute processing of other extracted data while the specific data is extracted. The receiving device according to any one of 1 to 6 . Said receiving means receives the RDS broadcasting signal, the particular data is TMC data included in the RDS data, the receiving apparatus according to any one claims 1 to 7. A receiver according to 8 any one claims 1, there is provided a system comprising a with the receiving apparatus and that can communicate navigation device,
The receiving device provides a navigation device with road traffic information multiplexed on a broadcast signal. A receiving program executed by a receiving device capable of receiving a broadcast signal in which data is multiplexed,
Receiving means for receiving the broadcast signal;
Identifying means for identifying data received by the receiving means;
Extraction means for extracting specific data from the identified data;
Determining means for determining whether or not the specific data is normally received based on a determination condition corresponding to the transmission standard of the specific data;
Extracting means for extracting broadcast station identification information for identifying a broadcast station of the broadcast signal received by the receiving means;
With reference to a second deviation table that defines the relationship between the content of deviation when the broadcast station transmits the specific data deviating from the transmission standard and the extracted broadcast station identification information, the extracted broadcast station A search is made for a deviation content corresponding to the identification information, and a relationship between a deviation content that deviates from the transmission standard and a deviation judgment condition that corresponds to the deviation content is defined as a deviation judgment condition that corresponds to the retrieved deviation content. Search means for searching from one deviation table ;
Changing means for changing the determination condition to the deviation determination condition searched by the search means;
The reception program capable of determining whether or not the specific data has been normally received based on the deviation determination condition. The reception program according to claim 10 , wherein when the determination unit determines that the specific data is not normally received based on a determination condition, the search unit searches for a deviation determination condition. The receiving program further includes an updating unit for updating the contents of the second departure table, and the updating unit registers the departure contents searched for in the first departure table in the second departure table. Item 11. A receiving program according to Item 10 . If the update means does not determine that the specific data has been normally received due to a deviation determination condition corresponding to the deviation content of the second deviation table, the update means changes the deviation content of the second deviation table to another The receiving program according to claim 12 , wherein the receiving program is changed to deviation content. Receiving program further, the when the specific data is determined to have been normally received by the determination means includes output means for outputting the specific data, according to claim 10 to 13 in any one into the receiving program according . A receiving method in a receiving apparatus capable of receiving a broadcast signal in which data is multiplexed,
Receiving the broadcast signal;
Identifying the received data;
Extracting specific data from the identified data;
Determining whether the specific data has been normally received based on a determination condition corresponding to a transmission standard of the specific data;
Extracting broadcast station identification information for identifying a broadcast station of the received broadcast signal;
With reference to a second deviation table that defines the relationship between the content of deviation when the broadcast station transmits the specific data deviating from the transmission standard and the extracted broadcast station identification information, the extracted broadcast station A first step of searching for deviation content corresponding to the identification information;
A second step of retrieving a deviation determination condition corresponding to the retrieved deviation content from a first deviation table that defines a relationship between a deviation content deviating from the transmission standard and a deviation determination condition corresponding to the deviation content; ,
Changing the determination condition to the deviation determination condition searched in the second step of searching;
Re-determining whether the specific data is normally received based on the deviation determination condition;
Receiving method. The receiving method according to claim 15 , wherein when the determining step determines that the specific data is not normally received based on a determination condition, the second step of searching searches for a deviation determination condition. The receiving method further includes a step of updating contents of the second deviation table, and the step of updating registers the deviation contents searched in the first deviation table in the second deviation table. Item 16. The reception method according to Item 15 . In the updating step, when it is determined that the specific data is not normally received due to a deviation determination condition corresponding to the deviation content of the second deviation table, the deviation content of the second deviation table is changed to another. The receiving method according to claim 17 , wherein the content is changed to a deviation content. Receiving method further when said particular data is determined to have been successfully received by said determining step comprises the step of outputting the specific data, the method of reception according to 18 any one the preceding claims 15 .

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