JP6783615B2 - Receiver and reception control method - Google Patents

Description

The present invention relates to a receiving device and a receiving control method.

RDS (Radio Data System), which multiplexes and transmits data signals such as information on the broadcasting station being received and information on the program being received, is mainly used in Europe and the like for FM (Frequency Modulation) broadcasting audio signals. It has been put to practical use in.

The data transmitted by RDS (hereinafter referred to as RDS data) includes, for example, a PI (Program Identification) code for identifying a program and AF (Alternative Frequencies) which is information on an alternative frequency broadcasting the same program. ) Various information such as data is included.

Using this PI code and AF data, for example, an RDS receiving device having an AF tracking function that continues to receive the same program by selecting a frequency that broadcasts the same program and has higher reception quality. It is known (see, for example, Patent Document 1).

Further, an RDS receiving device including an error correction unit that performs error detection and error correction of received RDS data and outputs an error detection result and an error correction number is known (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 8-125557 JP-A-2009-105536

In the AF tracking function as shown in Patent Document 1, how to make it possible to acquire RDS data including PI code and AF data with a weak electric field becomes an important issue.

By performing error correction as in Patent Document 2 to solve such a problem, it is possible to obtain an effect of substantially improving the reception sensitivity when receiving RDS data, so that the PI code can be obtained even in a place where the radio wave is weaker. Or, it becomes possible to acquire RDS data such as AF data.

However, the error correction function does not necessarily guarantee that an error has not occurred. For example, if the error-corrected PI code is incorrect, the PI code is different, that is, different even for the same program. There is a problem that it is identified as a program.

When such a problem occurs, for example, when displaying a broadcasting station list, displaying a broadcasting station name, displaying a text message from a broadcasting station, etc. based on the RDS data received by the RDS receiving device, etc. , There is a risk that incorrect information will be presented to the user.

The embodiment of the present invention has been made in view of the above problems, and in a receiving device for receiving a broadcast in which data is multiplexed, error correction is performed while improving the data receiving performance in a weak electric field. It reduces the presentation of incorrect information to the user due to error correction.

In order to solve the above problems, the receiving device according to the embodiment of the present invention is a receiving device that receives broadcasts in which data is multiplexed, and when the data contains an error of a predetermined number of bits or less. An error correction unit that executes error correction of the data, an information acquisition unit that acquires at least identification information for identifying the broadcast from the output data output from the error correction unit, and the information acquisition unit acquired. When the process execution unit that executes a predetermined process using the identification information and the predetermined process executed by the process execution unit are predetermined processes, the output data in which the error correction is executed is invalidated. possess a disabling control unit, a processing said predetermined that includes a process of using the identification information by the information acquisition unit has acquired, to create or display information to be provided to the user, the usage The information provided to the person includes a list of broadcasting stations or programs that can be received by the receiving device.

According to the embodiment of the present invention, in a receiving device that receives a broadcast in which data is multiplexed, erroneous information is presented to the user due to erroneous error correction while improving the data receiving performance in a weak electric field. Can be reduced.

It is a figure which shows the configuration example of the RDS receiving apparatus which concerns on one Embodiment. It is a figure which shows an example of the data format of RDS which concerns on one Embodiment. It is a figure which shows an example of the relationship between the presence / absence of error correction and reception sensitivity which concerns on one Embodiment. It is a flowchart which shows the example of the processing of the RDS receiving apparatus which concerns on one Embodiment. It is a figure which shows the example of the process which does not allow the error of PI which concerns on one Embodiment. It is a flowchart which shows an example of the broadcasting station list creation process which concerns on one Embodiment. It is a figure which shows the example of the broadcasting station list which concerns on one Embodiment. It is a figure which shows the example of the display screen of the broadcasting station list which concerns on one Embodiment. It is a flowchart which shows the example of the process of searching the optimum station of the designated PI station which concerns on one Embodiment. It is a flowchart which shows another example of the process of creating a broadcasting station list which concerns on one Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<Configuration of RDS receiver>
FIG. 1 is a diagram showing a configuration example of an RDS receiving device according to an embodiment. The RDS (Radio Data System) receiving device 100 uses data such as information on a broadcasting station being received and information on a program being received in the audio signal of FM (Frequency Modulation) broadcasting (hereinafter referred to as RDS data). It is a receiving device that receives RDS broadcasting that multiplexes and transmits.

In FIG. 1, the RDS receiving device 100 includes an antenna 101, an antenna distributor 102, a main tuner 110, a sub-tuner 120, an RDS decoder 130, 140, a control unit 150, an audio processor 103, a storage unit 104, an operation unit 105, and a display. It has a part 106 and the like.

The configuration of the RDS receiving device 100 shown in FIG. 1 is an example. For example, the storage unit 104 may be included in the control unit 150, or the operation unit 105 or the display unit 106 may be provided outside the RDS receiving device 100. Further, the antenna 101 may be included inside the RDS receiving device 100.

The RDS receiving device 100 has two tuners, and the main tuner 110 broadcasts and receives radio waves including data multiplexed in the broadcasting. Further, the RDS receiving device 100 uses the sub-tuner 120 to check, for example, the reception state of the alternative frequency of the broadcast received by the main tuner 110, and causes the main tuner to follow the alternative frequency with a good reception state. Performs processing such as AF (Alternative Frequencies) tracking.

The antenna 101 receives broadcasts transmitted from a plurality of broadcasting stations and radio waves of RDS broadcasts including RDS data multiplexed on the broadcasts. The antenna distributor 102 distributes the radio waves received by the antenna 101 to the main tuner 110 and the sub tuner 120.

The main tuner 110 receives the RDS broadcast according to the control from the control unit 150. The main tuner 110 includes, for example, a front end 111, an LPF (Loop Filter or Low Pass Filter) 112, a PLL (Phase Locked Loop) 113, a detector 114, a multiplexer 115, an S meter 116 and the like.

The front end 111 receives radio waves received via the antenna 101 and the antenna distributor 102, converts and amplifies the received radio waves to an intermediate frequency, and outputs the received radio waves to the detector 114. Further, the front end 111 generates a local signal for converting the received radio wave into an intermediate frequency according to the control voltage output from the PLL 113 via the LPF 112, and feeds back the generated local signal to the PLL 113.

The PLL 113 compares the phase of the local signal fed back from the front end 111 with the reference clock signal, and outputs an error signal that controls the frequency of the local signal to be a specified frequency. The LPF 112 extracts a low frequency component from the error signal output from the PLL 113 to generate a control voltage, and outputs the control voltage to the front end 111.

The front end 111 generates a local signal having a frequency corresponding to the control voltage output from the LPF 112, and uses the generated local signal to convert a radio wave having a reception frequency into an intermediate frequency.

The detector 114 detects an intermediate frequency signal output from the front end 111. The multiplexer 115 generates an audio signal using the detection output signal output from the detector 114, and in the case of stereo broadcasting, divides the channel into L (left) and R (right) channels and outputs the audio signal to the audio processor 103.

The S meter 116 detects the reception level of the radio wave being received from the detection signal of the detector 114, and outputs a signal or data indicating the detected reception level to the control unit 150.

The sub-tuner 120 receives RDS data in parallel with the main tuner 110 according to the control from the control unit 150. The sub-tuner 120 includes, for example, a front end 121, an LPF 122, a PLL 123, a detector 124, an S meter 125 and the like.

The front end 121 receives radio waves received via the antenna 101 and the antenna distributor 102, converts and amplifies the received radio waves to an intermediate frequency, and outputs the received radio waves to the detector 124. Further, the front end 121 generates a local signal for converting the received radio wave into an intermediate frequency according to the control voltage output from the PLL 123 via the LPF 122, and feeds back the generated local signal to the PLL 123.

The PLL 123 compares the phase of the local signal fed back from the front end 121 with the reference clock signal, and outputs an error signal that controls the frequency of the local signal to be a specified frequency. The LPF 122 extracts a low frequency component from the error signal output from the PLL 123 to generate a control voltage, and outputs the control voltage to the front end 121.

The front end 121 generates a local signal having a frequency corresponding to the control voltage output from the LPF 122, and uses the generated local signal to convert a radio wave having a reception frequency into an intermediate frequency.

The RDS decoders 130 and 140 take out the L-MSK (Level controlled Minimum Shift Keying) modulated signal component from the signals detected by the detectors 114 and 124, demodulate the L-MSK modulated signal, and extract the RDS data. Further, in the example of FIG. 1, the RDS decoders 130 and 140 have error correction units 131 and 141 that execute error detection and error correction of the demodulated RDS data. The error correction units 131 and 141 may be provided outside the RDS decoders 130 and 140.

The error correction units 131 and 141 detect an error in the RDS data extracted by the RDS decoders 130 and 140 in predetermined block units, and execute error correction when an error of a predetermined number of bits or less is detected. Further, the error correction units 131 and 141 notify the control unit 150 of the error detection result, the error correction result, and the like. For example, when the error correction is performed, information (for example, a flag) indicating that the error correction has been performed is added to the output data output by the error correction units 131 and 141.

The control unit 150 is realized by, for example, a microcomputer including a CPU (Central processing unit), a RAM (Random Access Memory), a flash ROM (Read Only Memory), a program executed by the microcomputer, and the like. For example, the control unit 150 realizes a reception control unit 151, an information acquisition unit 152, an invalidation control unit 153, a processing execution unit 154, a display control unit 155, etc. by executing a program stored in a flash ROM or the like. doing. It should be noted that at least a part of the functions of the control unit 150 may be realized by hardware.

The reception control unit 151 controls broadcasting and RDS data reception processing. For example, the reception control unit 151 controls the main tuner 110, the RDS decoder 130, and the like to receive the broadcast and the RDS data multiplexed on the broadcast. Further, the reception control unit 151 controls the sub-tuner 120, the RDS decoder 140, and the like to receive RDS data and the like at a frequency different from that of the main tuner 110.

Here, an example of RDS data received by the RDS receiving device 100 will be described.

FIG. 2 is a diagram showing an example of the RDS data format according to the embodiment. The RDS data is composed of 200 units of RDS groups having 104 bits as one group. The RDS group 200 is composed of four blocks, block A210, block B220, block C230, and block D240. Further, each block contains 16-bit data 201 and 10-bit checkword 202. The transmission speed of RDS data is 1187.5 bits / sec.

The block A210 of the RDS group 200 includes a PI code (Program Identification Code) 203 which is identification information for identifying a broadcast (broadcasting station, program, etc.).

The block B220 includes a GT (Group Type code) indicating the type of the RDS group 200, a PTY (Program Type) indicating the type of group broadcasting, group data 204 different depending on the GT value, and the like. Further, the block B220 includes data such as TP (Traffic Program Identification Code), which is a flag set to be turned on when broadcasting traffic information.

The block C230 contains data that differs depending on the type of RDS group 200. In the example of FIG. 2, the block C230 includes AF (Alternative Frequency) 205, which is information on another frequency (alternative frequency) that is broadcasting the same as the PI code 203.

The block D240 contains data that differs depending on the type of RDS group 200. In the example of FIG. 2, the block D240 includes a PS (Program Service name segment) 206 indicating the name of a broadcast (broadcasting station, program, etc.).

The RDS group 200 is classified into 16 types 0 to 15 by GT, which is 4-bit information contained in the block B 220, and two versions (A, B) are defined corresponding to each type 0 to 15. Has been done. For the group type defined in version A, the PI code 203 is always included in the block A210. Further, for the group type defined in version B, the PI code 203 is included in the block C230 in addition to the block A210. The RDS group 200 shown in FIG. 2 is an example of a type 0A (type 0, version A) format.

The 10-bit check word 202 included in each block of the RDS group 200 is used when the error correction units 131, 141, etc. of the RDS receiving device 100 detect and correct an error. The error correction units 131 and 141 of the RDS receiving device 100 use the 10-bit checkword 202 included in each block to detect an error of a predetermined number of bits (for example, 2 bits) or less, the bits of the data 201. Correct the error.

FIG. 3 is a diagram showing an example of the relationship between the presence / absence of error correction and the reception sensitivity according to the embodiment. This figure shows an example of the result of trying whether or not the PI could be determined (acquired) within 250 ms by changing the reception input level in the RDS receiving device 100.

In FIG. 3, it is shown that the RDS receiving device 100 could not determine the PI within 250 ms unless the input level was 20 dBμV or more without performing 2-bit error correction. Further, when 2-bit error correction is performed, the RDS receiving device 100 indicates that the PI could not be determined within 250 ms unless the input level was 18 dBμV or more. In this way, for example, by performing 2-bit error correction, the effect of substantially improving the reception sensitivity by about 2 dB can be expected.

Here, returning to FIG. 1, the description of the control unit 150 of the RDS receiving device 100 will be continued.

The information acquisition unit 152 included in the control unit 150 acquires the PI code 203 and the information required for processing from the output data output from the error correction unit 131.

The process execution unit 154 executes a predetermined process using the information acquired by the information acquisition unit 152. Here, the predetermined processing includes, for example, a process of creating a list of receivable broadcasting stations, a processing of displaying a broadcasting station name, a processing of displaying RT (Radio Text) which is text data notified from a broadcasting station, and the like. .. Further, in the predetermined processing, for example, a process of searching for the optimum broadcasting station from the broadcasting stations having the same PI as the broadcasting being received or the broadcasting stations having the designated PI, and the same PI as the broadcasting being received. AF tracking processing to another broadcasting station having the above, DAB-FM link processing, and the like are included.

DAB (Digital Audio Broadcasting) is a digital audio broadcasting in Europe. For example, when a program having the same content as an FM broadcast program is broadcast on DAB, the PI code of FM broadcast and the PI code of DAB are managed so as to match. For example, when a user is listening to a program on DAB and is out of the service area of DAB, the RDS receiving device 100 performs FM broadcasting having the same PI code as the PI code of DAB by DAB-FM link processing. Can be received.

When the predetermined process executed by the process execution unit 154 is a predetermined process, the invalidation control unit 153 invalidates the output data for which the error correction has been executed by the error correction unit 131. Here, the predetermined processing means that the user is informed that there is an error in the PI, for example, a processing for displaying a broadcasting station list, a processing for displaying a broadcasting station name, a processing for displaying a text message from a broadcasting station, or the like. It is assumed that the process of presenting incorrect information is predetermined.

On the other hand, the invalidation control unit 153 validates the output data whose error has been corrected by the error correction unit 131 when the predetermined process executed by the process execution unit 154 is a process other than the predetermined process.

The method of invalidating the error-corrected output data by the invalidation control unit 153 may be any method, but for example, the invalidation control unit 153 performs error correction in a predetermined process. The data may be discarded. Alternatively, the invalidation control unit 153 may turn off the error correction function of the error correction unit 141 when executing a predetermined process.

The display control unit 155 causes the display unit 106 to display, for example, an operation screen of the RDS receiving device 100, a processing result display screen by the processing execution unit 154, and the like.

The audio processor 103 performs predetermined signal processing on the audio signal output from the multiplexer 115, and outputs the audio signal.

The storage unit 104 is, for example, a non-volatile storage unit that stores information such as an alternative frequency list and a broadcasting station list created by the processing execution unit 154, and is realized by, for example, a flash ROM or the like.

The operation unit 105 is an input device such as an input key or a touch panel that receives an operation of a user. The display unit 106 is, for example, a display device such as a liquid crystal display.

<Processing flow>
Subsequently, the flow of the reception control method by the RDS receiving device according to the present embodiment will be described.

(Processing of RDS receiver)
FIG. 4 is a flowchart showing an example of processing of the RDS receiving device according to the embodiment. The process shown in FIG. 4 shows the flow of the process when the process execution unit 154 of the RDS receiving device 100 executes the predetermined process described above.

In step S401, the reception control unit 151 of the RDS receiving device 100 effectively sets the error correction processing of the error correction unit and starts receiving the RDS data. For example, in the reception control unit 151, when the processing execution unit 154 performs a process of displaying the broadcasting station name of the broadcast currently being received, text information, etc., the error correction function of the error correction unit 131 is enabled and the main tuner is used. The 110 is used to start receiving RDS data. Further, when the processing execution unit 154 acquires RDS data at a frequency different from the frequency currently being received, the reception control unit 151 enables the error correction function of the error correction unit 141 and uses the sub-tuner 120 to RDS. Start receiving data.

In step S402, the invalidation control unit 153 of the RDS receiving device 100 determines whether the predetermined processing executed by the processing execution unit 154 is a processing in which an error in the PI code (hereinafter referred to as PI) is allowed. Determine if the process is error-tolerant. The process in which an error in PI is not allowed is an example of a predetermined process. Further, the process in which a PI error is allowed is an example of a process other than the predetermined process.

When the process executed by the process execution unit 154 is a process in which an error in PI is allowed, the invalidation control unit 153 shifts the process to step S403 and enables the error-corrected RDS data.

On the other hand, when the process executed by the process execution unit 154 is a process in which an error in PI is not allowed, the invalidation control unit 153 shifts the process to step S404 and invalidates the error-corrected RDS data.

FIG. 5 is a diagram showing an example of processing in which an error of PI according to one embodiment is not allowed.

For processing in which an error in PI is not tolerated, for example, as shown in FIG. 5, a process of displaying information provided to the user using the acquired PI or a process of displaying information provided to the user using the acquired PI is performed. The process to create is included. Further, as specific examples of processing in which PI errors are not tolerated, for example, a processing for creating a list of receivable broadcasting stations, a processing for displaying the broadcasting station name of the broadcasting being received, and a processing for broadcasting being received are provided. It includes processing for displaying text information such as RT.

In these processes, if the acquired PI contains an error, there is a risk that incorrect information will be presented to the user. Since the error correction function by the error correction unit 131 does not necessarily guarantee that an error has not occurred, the invalidation control unit 153 presents incorrect information to the user when these processes are executed. Disable error-corrected RDS data so that it is not done.

On the other hand, the process in which the error of the PI is allowed is, for example, a process other than the process in which the error of the PI is not allowed, as shown in FIG. Is included. Further, as a specific example of the process in which an error in the PI is allowed, a process of searching for the optimum broadcasting station from the PI of the broadcasting being received or a broadcasting station having the same PI as the specified PI, and receiving. AF follow-up processing (AF follow-up processing) to other broadcasting stations having the same PI as the broadcast of the above is included. Further, when the RDS receiving device 100 has the DAB-FM link function, the processing in which the PI error is allowed includes the DAB-FM link processing and the like.

For example, the invalidation control unit 153 stores information for identifying a process in which a PI error as shown in FIG. 5 is not allowed in a storage unit 104 or the like in advance, so that the process execution unit 154 executes the predetermined information. It is possible to determine whether the processing of is the processing in which the error of PI is tolerated.

Returning to FIG. 4, the explanation of the flowchart will be continued.

In step S405, the process execution unit 154 executes a predetermined process using valid data. For example, when the process execution unit 154 executes a process in which an error in PI is allowed, the valid data includes the RDS data corrected by the error correction unit 131. On the other hand, when the process execution unit 154 executes a process in which an error in PI is not allowed, the valid data does not include the RDS data corrected by the error correction unit 131.

By the above processing, the RDS receiving device 100 can reduce the presentation of erroneous information to the user due to the erroneous correction of the error correction while executing the error correction processing for improving the data reception performance in the weak electric field. become able to.

(Broadcasting station list creation process)
FIG. 6 is a flowchart showing an example of a broadcasting station list creation process according to an embodiment. The broadcasting station list creation process shown in FIG. 6 is an example of a predetermined process executed by the process execution unit 154 in step S405 of FIG. 4 in which a PI error is not allowed. The processing execution unit 154 can create a list of broadcasting stations that can be received by the RDS receiving device 100, for example, by executing the processing shown in FIG. 6 at all available frequencies.

In step S601, the processing execution unit 154 of the RDS receiving device 100 sets, for example, the receiving frequency of the sub-tuner 120 to the frequency to be processed by using the receiving control unit 151.

In step S602, the processing execution unit 154 determines whether or not there is a broadcasting station at the set reception frequency based on various information acquired from the sub-tuner 120 (for example, reception level information acquired from the S meter 125).

If there is no broadcasting station at the set reception frequency, the processing execution unit 154 ends the processing at the reception frequency and executes the same processing at the next reception frequency, for example. On the other hand, when there is a broadcasting station at the set reception frequency, the processing execution unit 154 executes the processing after step S603.

In step S603, the processing execution unit 154 acquires the RDS data (output data) output from the error correction unit 141 by using the information acquisition unit 152.

In step S604, the invalidation control unit 153 executes a process of invalidating the RDS data (output data) for which the error correction is executed by the error correction unit 141 among the RDS data acquired by the information acquisition unit 152.

For example, when the RDS data acquired by the information acquisition unit 152 has been error-corrected, the invalidation control unit 153 returns the process to step S603 and acquires new RDS data by the information acquisition unit 152. On the other hand, the invalidation control unit 153 shifts the process to step S605 when the RDS data acquired by the information acquisition unit 152 has not been error-corrected.

As described above, the output data output by the error correction units 131 and 141 is provided with information indicating that the error correction has been performed when the error correction has been performed. Therefore, the invalidation control unit 153 determines whether or not the RDS data has been error-corrected based on whether or not the information indicating that the error correction has been performed is added to the RDS data acquired by the information acquisition unit 152. can do.

In step S605, the processing execution unit 154 acquires PI from the acquired RDS data. For example, the processing execution unit 154 acquires the PI code 203 included in the block A210 of the RDS group 200 as shown in FIG.

In step S606, the process execution unit 154 branches the process depending on whether or not the PI acquisition is successful. If the acquisition of the PI fails, the processing execution unit 154 ends the processing at the reception frequency. On the other hand, if the acquisition of PI is successful, the process execution unit 154 shifts the process to step S607. The failure to acquire the PI includes, for example, the case where the RDS data is not distributed, the case where the PI cannot be determined, and the like.

When the process proceeds to step S607, the processing execution unit 154 determines whether the acquired PI is registered in, for example, the broadcasting station list 710 stored in the storage unit 104 as shown in FIG. 7A.

FIG. 7A shows an example of a list of broadcasting stations according to an embodiment. In the example of FIG. 7A, the broadcasting station list 710 includes information such as “frequency”, “PI”, “AF”, “PS”, and “PTY”.

The "frequency" is information on the reception frequency of the broadcast to be received (for example, FM broadcast).

The “PI” is, for example, the PI code 203 obtained from the block A210 or the like of the RDS group 200 as shown in FIG.

"AF", for example, information on AF (Alternative Frequency) 205 acquired from block C230 or the like of RDS group 200 as shown in FIG.

The "PS" information is, for example, a character string obtained by decoding PS (Program Service name segment) 206 acquired from the block D240 of the RDS group 200 as shown in FIG. 2, and is a broadcast (or program) name or the like. This is the information to be shown.

The "PTY" information is, for example, information indicating the content (genre) of broadcasting corresponding to the PTY (Program Type) information acquired from the block B220 or the like of the RDS group 200 as shown in FIG.

In step S607 of FIG. 6, when the acquired PI is registered in, for example, the broadcasting station list 710 as shown in FIG. 7A, the processing execution unit 154 acquires other data from the acquired RDS data. Is determined to be unnecessary, and the processing at the reception frequency is terminated. On the other hand, when the acquired PI is not registered in the broadcasting station list 710, the process execution unit 154 shifts the process to step S608.

When the process proceeds to step S608, if the PI is not registered in the broadcasting station list 710, the processing execution unit 154 determines that the PI is a new broadcasting station, and obtains other information from the acquired RDS data, for example, the AF described above. Acquire information such as PS and PTY.

In step S609, the processing execution unit 154 associates the PI acquired in step S605 with the information acquired in step S608 and registers (stores) it in, for example, the broadcasting station list 710 as shown in FIG. 7A. To do.

The processing execution unit 154 updates the broadcasting station list 710 as shown in FIG. 7A, for example, by executing the above processing at all reception frequencies.

If, in step S604 of FIG. 6, the error-corrected RDS data is not invalidated and the error-corrected RDS data error is included, for example, an erroneous PI as shown in FIG. 7B is used. A list of stations including 720 may be created.

The example of FIG. 7B shows an example in which the PI code acquired at the frequency f1 is erroneously acquired as “D31x” in the process of creating the broadcasting station list. In this example, data 721 including an incorrect PI code is registered in the frequency f1 of the broadcasting station list 720. In this way, when the PI code contains an error, the processing execution unit 154 determines that the PI code is a new broadcasting station because the PI code is not registered in the broadcasting station list 720, and the broadcasting station that does not actually exist. May be registered in the broadcasting station list 720.

FIG. 8 is a diagram showing an example of a display screen of a broadcasting station list according to an embodiment.

FIG. 8A shows an example of a display screen 810 of the broadcasting station list displayed on the display unit 106 by the display control unit 155 using the broadcasting station list 710 shown in FIG. 7A. In the example of FIG. 8A, the display screen 810 of the broadcasting station list displays a display field 811 for displaying information on the currently received broadcast and a display field 812 for displaying a list of receivable broadcasts. Has been done.

In the display field 811 that displays the information of the broadcast currently being received, for example, the broadcast station name (or program name) stored in the PS of the broadcast station list 710 shown in FIG. 7 (a) and the broadcast station name (or program name) stored in the PTY are stored. The content (genre) of the broadcast is displayed.

In the display field 812 that displays a list of receivable broadcasts, a list of receivable broadcast station names (or program names) is displayed in a selectable manner, and is received by the currently receiving broadcast station (FM DEF). A display element 813 indicating that the inside is inside is displayed.

8 (b) shows a display screen 820 of the broadcast station list displayed on the display unit 106 by the display control unit 155 using the broadcast station list 720 including the incorrect PI as shown in FIG. 7 (b). An example of is shown. In the example of FIG. 8B, in the display field 821 displaying a list of receivable broadcasts, in addition to the information 822 of "FM ABC" actually broadcast at the frequency f1, a PI code including an error is displayed. Information 823 of "FM ABC" stored in association with each other is displayed.

In this way, when the processing execution unit 154 creates the information to be provided to the user (for example, the broadcasting station list 710) using the acquired PI, if the PI contains an error, for example, FIG. 7 (b). ), Incorrect information may be accumulated in the storage unit 104. Similarly, when the processing execution unit 154 displays the information to be provided to the user by using the acquired PI, if the PI contains an error, for example, as shown in FIG. 8B, the user. There is a risk that incorrect information will be presented to.

In the present embodiment, in step S604 of FIG. 6, since the invalidation control unit 153 performs a process of invalidating the error-corrected RDS, such erroneous information is accumulated in the storage unit 104. , And the display on the display unit 106 can be reduced.

(Process to search for the optimum station of the specified PI station)
FIG. 9 is a flowchart showing an example of a process of searching for the optimum station of the designated PI station according to the embodiment. The process of searching for the optimum station of the PI station shown in FIG. 9 is an example of a process in which a PI error is allowed among the predetermined processes executed by the process execution unit 154 in step S405 of FIG. By this process, the RDS receiving device 100 has the same PI code when receiving a broadcasting station (hereinafter referred to as a PI station) designated by a user or the like, and broadcasts on different frequencies. The most suitable broadcasting station can be selected from the broadcasting stations (hereinafter referred to as AF stations).

In step S901, the processing execution unit 154 of the RDS receiving device 100, for example, AFs the PI station having the designated PI code from the broadcasting station list 710 (or the alternative frequency list or the like) as shown in FIG. 7A. Get information on (alternative frequency).

In step S902, the processing execution unit 154 confirms the reception status of each acquired AF by using the reception control unit 151. For example, the processing execution unit 154 uses the reception control unit 151 to set the reception frequency of the sub-tuner 120 to the frequency of each AF, and acquires the reception level information of each AF station output from the S meter 125.

In step S903, the processing execution unit 154 determines whether there is an AF station that satisfies a predetermined reception condition (for example, the reception level is equal to or higher than the reception level of the PI station).

If there is no AF station that satisfies the predetermined reception condition, the processing execution unit 154 shifts the processing to step S911 and starts outputting the broadcast audio with the frequency of the designated PI station as the reception frequency.

On the other hand, when there is an AF station that satisfies a predetermined reception condition, the process execution unit 154 executes the processes after step S904.

When the process proceeds to step S904, the processing execution unit 154 selects an AF station satisfying a predetermined reception condition as a candidate, and selects the AF station having the best reception state from the candidate AF stations.

In step S905, the processing execution unit 154 acquires the RDS data of the selected AF station.

At this time, the invalidation control unit 153 does not perform the process of invalidating the RDS data for which the error correction has been executed, as shown in step S604 of FIG. 6, that is, enables the error-corrected data. ..

In step S906, the processing execution unit 154 acquires a PI (PI code) from the acquired RDS data.

In step S907, the process execution unit 154 branches the process depending on whether or not the PI can be acquired from the RDS data.

If the PI cannot be acquired from the RDS data, the process execution unit 154 cannot determine that the broadcast (or program) is the same as the PI station, so that the selected AF station cannot be received and the process proceeds to step S910. When the process proceeds to step S910, the process execution unit 154 excludes the AF station selected in step S904 from the candidates, and executes the processes after step S903 again.

On the other hand, when the PI can be acquired from the RDS data, the process execution unit 154 shifts the process to step S908.

When the process proceeds to step S908, the process execution unit 154 determines whether the PI acquired from the RDS data matches the designated PI.

If the acquired PI does not match the specified PI, the process execution unit 154 determines that the selected AF station does not provide the same broadcast (or program) as the PI station, and performs the process in step S910. Migrate.

On the other hand, when the acquired PI matches the designated PI, the process execution unit 154 shifts the process to step S909.

When the process proceeds to step S909, the processing execution unit 154 starts outputting the broadcast audio with the frequency of the selected AF station as the reception frequency.

In the above process, for example, even if the PI acquired in step S906 contains an error, the designated PI station or another AF station is selected, so that incorrect information is provided to the user. There is no. In addition, the fact that the PI of the selected AF station contains an error is considered to mean that the reception quality is poor even if the reception level is high (for example, when other interfering radio waves are mixed). Therefore, even if the PI contains an error, it is considered that there is virtually no effect.

As described above, the RDS receiving device 100 according to the present embodiment invalidates the output data in which the error correction is executed when the predetermined processing executed by the processing execution unit 154 is a predetermined processing. As a result, according to the present embodiment, in the RDS receiving device 100 that receives the broadcast in which the data is multiplexed, the user is erroneously corrected by the error correction unit 131 while improving the data receiving performance in the weak electric field. It is possible to reduce the presentation of information.

The process in which the invalidation control unit 153 invalidates the error-corrected RDS data in step S604 of FIG. 6 is an example, and the invalidation control unit 153 uses an error-corrected RDS data by another method. May be invalidated.

FIG. 10 is a flowchart showing another example of the broadcasting station list creation process according to the embodiment. In the process shown in FIG. 10, the processes of steps S1001 and S1002 are added in place of the process of step S604 in the process of creating the broadcasting station list shown in FIG. Of the processes shown in FIG. 10, the processes of steps S601 to S603 and steps S605 to S609 are the same as the process of creating the broadcasting station list shown in FIG. 6, so here, the differences from the processes shown in FIG. Will be mainly explained.

In step S1001, the invalidation control unit 153 of the RDS receiving device 100 sets, for example, the error correction function of the error correction unit 141 to off before the processing execution unit 154 starts the broadcasting station list creation process.

Further, after the processing execution unit 154 finishes the processing of steps S601 to S609, in step S1002, the invalidation control unit 153 sets the error correction function of the error correction unit 141 to on.

By the above processing, the RDS including the error is discarded by the error correction unit 141, so that the invalidation control unit 153 can invalidate the error-corrected RDS data.

100 RDS receiver (receiver)
141 Error correction unit 152 Information acquisition unit 153 Invalidation control unit 154 Processing execution unit 710 Broadcasting station list 810 Broadcasting station list display screen

Claims (9)

A receiving device that receives broadcasts with multiplexed data.
When the data contains an error of a predetermined number of bits or less, an error correction unit that executes error correction of the data and an error correction unit.
An information acquisition unit that acquires at least identification information for identifying the broadcast from the output data output from the error correction unit.
A process execution unit that executes a predetermined process using the identification information acquired by the information acquisition unit, and
When the predetermined process executed by the process execution unit is a predetermined process, the invalidation control unit that invalidates the output data for which the error correction has been executed, and the invalidation control unit.
Have a,
The predetermined process is
Including a process of creating or displaying information to be provided to a user by using the identification information acquired by the information acquisition unit.
The information provided to the user is
A receiver that includes a list of stations or programs that the receiver can receive. A receiving device that receives broadcasts with multiplexed data.
When the data contains an error of a predetermined number of bits or less, an error correction unit that executes error correction of the data and an error correction unit.
An information acquisition unit that acquires at least identification information for identifying the broadcast from the output data output from the error correction unit.
A process execution unit that executes a predetermined process using the identification information acquired by the information acquisition unit, and
When the predetermined process executed by the process execution unit is a predetermined process, the invalidation control unit that invalidates the output data for which the error correction has been executed, and the invalidation control unit.
Have,
The predetermined process is
Including a process of creating or displaying information to be provided to a user by using the identification information acquired by the information acquisition unit.
The information provided to the user is
The receiving apparatus includes information of a broadcast station or program being received, the receiving apparatus. A receiving device that receives broadcasts with multiplexed data.
When the data contains an error of a predetermined number of bits or less, an error correction unit that executes error correction of the data and an error correction unit.
An information acquisition unit that acquires at least identification information for identifying the broadcast from the output data output from the error correction unit.
A process execution unit that executes a predetermined process using the identification information acquired by the information acquisition unit, and
When the predetermined process executed by the process execution unit is a predetermined process, the invalidation control unit that invalidates the output data for which the error correction has been executed, and the invalidation control unit.
Have,
The predetermined process is
Including a process of creating or displaying information to be provided to a user by using the identification information acquired by the information acquisition unit.
The information provided to the user is
It said receiving apparatus comprises a text information provided from the broadcast station or program being received, the receiving apparatus. The invalidation control unit
When the predetermined process executed by the process execution unit is different from the predetermined process, any one of claims 1 to 3 for validating the output data for which the error correction has been executed. The receiver described. The processing different from the predetermined processing is
The receiving device according to claim 4 , further comprising a process of selecting one broadcast having a good reception state from a plurality of broadcasts corresponding to the designated identification information. The processing different from the predetermined processing is
The fourth or fifth claim includes a process of receiving the frequency of one broadcast having a good reception state among a plurality of broadcasts corresponding to the identification information included in the output data by using the information of the alternative frequency acquired in advance. The receiver described. It is a reception control method by a receiving device that receives broadcasts in which data is multiplexed.
The receiving device
When the data contains an error of a predetermined number of bits or less, an error correction step for executing error correction of the data and an error correction step
An information acquisition step of acquiring at least identification information for identifying the broadcast from the data, and
When the predetermined process to be executed using the identification information acquired in the information acquisition step is a predetermined process, the invalidation control step for invalidating the data in which the error correction is executed, and the invalidation control step.
A process execution step of executing the predetermined process using the identification information included in the valid data, and
And run
The predetermined process is
Including a process of creating or displaying information to be provided to a user by using the identification information acquired in the information acquisition step.
The information provided to the user is
A reception control method including a list of broadcasting stations or programs that the receiving device can receive . It is a reception control method by a receiving device that receives broadcasts in which data is multiplexed.
The receiving device
When the data contains an error of a predetermined number of bits or less, an error correction step for executing error correction of the data and an error correction step
An information acquisition step of acquiring at least identification information for identifying the broadcast from the data, and
When the predetermined process to be executed using the identification information acquired in the information acquisition step is a predetermined process, the invalidation control step for invalidating the data in which the error correction is executed, and the invalidation control step.
A process execution step of executing the predetermined process using the identification information included in the valid data, and
And run
The predetermined process is
Including a process of creating or displaying information to be provided to a user by using the identification information acquired in the information acquisition step.
The information provided to the user is
A reception control method including information on a broadcasting station or program received by the receiving device. It is a reception control method by a receiving device that receives broadcasts in which data is multiplexed.
The receiving device
When the data contains an error of a predetermined number of bits or less, an error correction step for executing error correction of the data and an error correction step
An information acquisition step of acquiring at least identification information for identifying the broadcast from the data, and
When the predetermined process to be executed using the identification information acquired in the information acquisition step is a predetermined process, the invalidation control step for invalidating the data in which the error correction is executed, and the invalidation control step.
A process execution step of executing the predetermined process using the identification information included in the valid data, and
And run
The predetermined process is
Including a process of creating or displaying information to be provided to a user by using the identification information acquired in the information acquisition step.
The information provided to the user is
A reception control method that includes text information provided by a broadcasting station or program that the receiving device is receiving.

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