JP4043858B2 - Multiple broadcast receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention extracts, for example, information data such as RDS data from a multiplex broadcast signal such as a radio data system (hereinafter simply referred to as RDS) broadcast, and implements various service functions based on the RDS data. The present invention relates to a multiple broadcast receiving apparatus.
[0002]
[Prior art]
Conventionally, RDS broadcasting, which is such multiplex broadcasting, multiplexes RDS data into program broadcasting, and provides various service functions to listeners based on the RDS data.
[0003]
The RDS data is composed of 16 types of groups from 0 to 15 groups according to the contents, and these groups are composed of four blocks from the first block to the fourth block. Each of these 16 types of groups has two versions A and B defined, and these recognition codes are arranged in the second block.
[0004]
For example, a local network program identification code (PI code) indicating, for example, a country code or a broadcast area code is arranged in the first block, and a local network program type code (PTY code) or the like is arranged in the second block. This PTY code is a 5-bit code for identifying 32 types of programs (music program, news program, sports program, etc.) from 0 to 31, and is based on a predetermined rule. The program type is assigned.
[0005]
Further, alternative frequency data (AF list) of each station of the network station group that broadcasts the same program is arranged in the third block, and broadcast station name data such as a broadcast station name and a network name is arranged in the fourth block. (PS data) is arranged.
[0006]
Such RDS data includes TMC data for transmitting traffic information.
[0007]
This TMC data is transmitted using, for example, the 8A group in the RDS data. FIG. 5 is an explanatory diagram showing the data format structure of the 8A group used for transmitting TMC data.
[0008]
In FIG. 5, the PI code is arranged in the first block, and various codes relating to the message management and expansion system are arranged in the second block in addition to the 4-bit group identification code indicating the 8A group. For example, a 1-bit short message code (S) indicating a short message, and a 1-bit group message identification code (G) indicating whether one message is transmitted to one group or a plurality of groups. A 3-bit traffic time code (DP) indicating an approximate traffic time is arranged. This traffic time code is used to indicate the traffic time of 8 stages (0 to 4 hours).
[0009]
The third block includes, for example, a detour identification code (D) indicating the presence / absence of a detour, a 3-bit EXTENT code including a location offset address, and a weather condition, construction, traffic jam, public transportation, etc. An 11-bit EVENT code indicating information is arranged.
[0010]
In the fourth block, a 16-bit LOCATION code indicating position information is arranged. For example, in the case of Germany, addresses 1 to 16 are assigned to each state in this LOCATION code, followed by counties, administrative districts and autonomous regions, and then main roads such as autobahns and national roads. It is subdivided into specific areas such as areas and road entrances in hierarchical order, such as autobahn exits, level intersections and service areas, and then roads from main roads. If an extended system using various codes in the TMC data is used, various information for appropriately instructing a detour for traffic congestion can be provided.
[0011]
Now, an RDS broadcast receiving apparatus that receives and decodes such RDS data such as TMC data will be described. FIG. 6 is a block diagram showing a schematic configuration inside the RDS broadcast receiving apparatus.
[0012]
The RDS broadcast receiving apparatus 1 shown in FIG. 6 employs a double tuner function configured by, for example, a main reception system 10A and a sub reception system 10B, and receives a reception antenna 2 that receives an incoming broadcast signal, and receives by this reception antenna 2. Antenna distributor 3 that distributes the broadcast signal to main reception system 10A and sub-reception system 10B, amplifier 4 that amplifies the broadcast signal tuned by main system reception system 10A, and amplifier 4 A speaker 5 for outputting broadcast signals as audio, a display unit 6 for displaying various information, a memory 7 for storing various information, and a system microcomputer 8 for controlling the entire RDS broadcast receiving apparatus 1 are provided. ing.
[0013]
The main receiving system 10A is tuned to a broadcast signal of an arbitrary frequency from the broadcast signal distributed by the antenna distributor 3, and outputs a main tuner 11A that outputs the tuned broadcast signal to the amplifier 4, and a broadcast signal of an arbitrary frequency. The main PLL 12A for generating a tuning frequency signal for tuning to the main signal, the main BPF 13A for extracting the RDS data component from the broadcast signal tuned by the main tuner 11A, and the RDS data extracted by the main BPF 13A are decoded. Main RDS decoder 14A.
[0014]
Further, the sub-reception system 10B generates a sub-tuner 11B that tunes from the broadcast signal distributed by the antenna distributor 3 to a broadcast signal of an arbitrary frequency, and a tuning frequency signal for tuning to the broadcast signal of an arbitrary frequency. It has a sub PLL 12B, a sub BPF 13B that extracts RDS data components from a broadcast signal tuned by the sub tuner 11B, and a sub RDS decoder 14B that decodes the RDS data extracted by the sub BPF 13B. .
[0015]
In the system microcomputer 8, RDS data extracted by the main RDS decoder 14 </ b> A of the main reception system 10 </ b> A and the sub RDS decoder 14 </ b> B of the sub reception system 10 </ b> B is stored in the memory 7. Service functions can be realized.
[0016]
Examples of the service function include a program list display function, a PTY interrupt function, a PTY search function, and the like, and a traffic information display function based on the TMC data described above.
[0017]
For example, the program list display function is a display unit 6 that indicates which broadcast station is broadcasting what kind of program based on the stored contents of the memory 7 that stores the PI code and the PTY code in association with each other. It is a function to display a list.
[0018]
The PTY interrupt function is a broadcast having the same PTY code as an arbitrary PTY code designated in advance by an operation unit (not shown) based on, for example, the stored contents of the memory 7 storing the PI code and the PTY code in association with each other. This is a function for interrupting reception of the broadcast of the detected same PTY code.
[0019]
The PTY search function is a function for searching for a broadcast related to an arbitrary PTY code specified in advance by an operation unit (not shown) based on the stored contents of the memory 7 storing the PI code and the PTY code in association with each other. is there.
[0020]
The traffic information display function is a function that can obtain traffic information of each desired point at a user's request using an operation unit (not shown) based on the storage contents (TMC data) of the memory 7.
[0021]
Therefore, in order to realize these service functions, the system microcomputer 8 extracts the latest RDS data and TMC data from the incoming broadcast signal, and stores and updates the extracted latest RDS data and TMC data in the memory 7. There is a need to.
[0022]
The latest RDS data stored and updated in the memory 7 includes, for example, a PI code, a PTY code, an AF list, PS data, a TMC determination flag indicating the presence / absence of TMC data, and other network data (Other RDS). .
[0023]
In the system microcomputer 8, while the main reception system 10A receives a predetermined broadcast signal, the sub reception system 10B receives another broadcast signal and extracts the latest TMC data from the received broadcast signal. The latest extracted TMC data is stored and updated in the memory 7.
[0024]
In addition, the system microcomputer 8 sequentially extracts the latest RDS data from these broadcast signals by receiving all broadcast signals in the FM broadcast band that can be received by the sub-reception system 10B in the interval of receiving the TMC data. The latest RDS data is stored and updated in the memory 7.
[0025]
According to such an RDS broadcast receiving apparatus 1, the latest RDS data is sequentially extracted from these broadcast signals by receiving all broadcast signals in the FM broadcast band that can be received in the interval of receiving TMC data. Since the latest RDS data is stored and updated in the memory 7, various service functions can be provided to the listener based on the latest stored contents of the memory 7.
[0026]
In such an RDS broadcast receiving apparatus 1, the latest RDS data in the receivable FM broadcast band is extracted and the extracted RDS data is stored and updated in the memory 7. For example, PI codes are arranged in all groups of RDS data, and the time required for PI code extraction from this RDS data is 87.6 msec at the shortest, so it is extracted in a relatively short time. be able to. However, PS data is allocated only to the RDS data of the 0A or 0B group, and only 2 characters out of all 8 characters can be transmitted at one time. Since the flag is also arranged in the RDS data of the group 3A, the extraction takes a long time.
[0027]
[Problems to be solved by the invention]
However, according to the conventional RDS broadcast receiving apparatus 1, when the latest RDS data is stored and updated, all broadcast signals in the receivable FM broadcast band are received in the interval of receiving the TMC data. Thus, the latest RDS data is sequentially extracted from these broadcast signals, and the latest RDS data sequentially extracted is stored and updated in the memory 7. Of these RDS data, for example, the PI code and the PTY code are relatively Although it can be extracted in a short time, it takes time to extract the PS data and the TMC judgment flag. Therefore, RDS data should be extracted from all broadcast signals within a limited time between receiving TMC data. For example, if all RDS stations are 10 stations, only 3 RDS data can be stored and updated. .
[0028]
In order to cope with such a situation, it is possible to extract the latest RDS data from all the RDS stations at one time, and store and update the extracted latest RDS data in the memory 7 and then receive the TMC data. Since it takes a very long time to store and update the latest RDS data from all the RDS stations, TMC data cannot be received during that time.
[0029]
Accordingly, the present invention has been made in view of the above points, and the object of the present invention is to minimize the necessary information from all broadcast signals within the broadcast band without greatly reducing the time for receiving TMC data, for example. An object of the present invention is to provide a multiplex broadcast receiving apparatus capable of efficiently storing and updating data.
[0030]
[Means for Solving the Problems]
In order to achieve the above object, a multiplex broadcast receiving apparatus according to the present invention includes a receiving unit that receives a multiplex broadcast signal obtained by multiplexing a plurality of types of information data, and the plurality of types of multiplex broadcast signals received from the multiplex broadcast signal received by the receiving unit. Data extraction means for extracting information data, storage means for storing a plurality of types of information data extracted by the data extraction means, and extraction of new information data by the data extraction means, the newly extracted information A multiplex broadcast receiving apparatus having data update means for storing and updating data in the storage means, wherein the data extraction means is configured to receive the plurality of types of information data from all multiplex broadcast signals within a broadcast band of the multiplex broadcast signal. Information extraction means for preferentially extracting the special information data contained in the information, and the special information extraction means for extracting the special information data from the fully multiplexed broadcast signal And a normal information extracting means for extracting the plurality of types of information data other than the special information data, and the data updating means preferentially receives the special information data extracted by the special information extracting means. After storing and updating the storage means, the information data extracted by the normal information extracting means is stored and updated in the storage means.
[0031]
Therefore, according to the multiplex broadcast receiver of the present invention, the special information data is preferentially extracted from all the multiplex broadcast signals in the broadcast band, and the special information data is preferentially stored and updated in the storage means. Information data other than information data is extracted and information data other than these special information data is stored and updated in the storage means, that is, instead of storing and updating all information data of all multiplexed broadcast signals at once, Special information data, which is the minimum necessary information data, is preferentially stored and updated, so that, for example, all multiplexed broadcast signals within the broadcast band can be obtained without significantly reducing the time to receive TMC data. Therefore, the necessary minimum information data can be efficiently stored and updated.
[0032]
In the multiplex broadcast receiving apparatus of the present invention, the special information data is a program identification code for identifying a broadcast program, and the data updating means preferentially stores the program identification code extracted by the special information extraction means. After storing and updating the means, the information data extracted by the normal information extracting means is stored and updated for each program identification code.
[0033]
Therefore, according to the multiplex broadcast receiving apparatus of the present invention, the program identification code is preferentially extracted from the information data, the program identification code is preferentially stored and updated in the storage means, and then the information data other than the program identification code is stored. This information data is extracted and stored in the storage means, that is, it is generally possible to extract in a short time instead of storing and updating all information data of all multiplexed broadcast signals at once. Since the program identification code required for data storage update is preferentially stored and updated, for example, the necessary minimum information can be obtained from all multiplexed broadcast signals within the broadcast band without greatly reducing the time to receive TMC data. Data can be stored and updated efficiently.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an RDS broadcast receiver according to an embodiment of the multiplex broadcast receiver of the present invention will be described with reference to the drawings. In addition, about the structure which overlaps with the RDS broadcast receiver 1 shown in FIG. 6, the same code | symbol is attached | subjected and description about the overlapping structure and operation | movement is abbreviate | omitted.
[0035]
The difference between the RDS broadcast receiving apparatus 1 showing the present embodiment and the RDS broadcast receiving apparatus 1 shown in FIG. 6 is in the internal configuration of the system microcomputer 8A.
[0036]
FIG. 1 is a block diagram showing a schematic configuration inside a system microcomputer 8A which is a main part of an RDS broadcast receiving apparatus 1 showing the present embodiment.
[0037]
The system microcomputer 8A shown in FIG. 1 includes a special information extraction unit 21 that extracts a PI code from RDS data decoded by the main RDS decoder 14A and the sub RDS decoder 14B, and the main RDS decoder 14A and the sub RDS decoder 14B. A normal information extracting unit 22 for extracting RDS data other than the PI code decoded in step S3, and a data updating unit 23 for storing and updating the RDS data extracted by the special information extracting unit 21 and the normal information extracting unit 22 in the memory 7; have.
[0038]
The RDS data other than the PI code corresponds to PS data, TMC determination flag, AF list, and other network data.
[0039]
The normal information extraction unit 22 naturally extracts TMC data when receiving TMC data.
[0040]
FIG. 2 is an explanatory diagram briefly showing an example of the update contents of the memory 7 by the data update unit 23.
[0041]
In FIG. 2, the memory 7 stores a PI code, PS data, a TMC determination flag, an AF list, and other network data in association with each address.
[0042]
For example, if the PI code is PI-01, as shown in FIG. 2A, PS data (PS-01), TMC determination flag (OFF), AF list (F-11, F12, F-13) and other network data (RDS-01) are stored.
[0043]
In the system microcomputer 8A, for example, when a broadcast signal is received by the main reception system 10A, the sub reception system 10B receives TMC data, and within the FM broadcast band between reception of the TMC data. Although the latest RDS data is extracted by sequentially receiving all the multiplexed broadcast signals, the greatest feature of the RDS broadcast receiving apparatus 1 shown in the present embodiment is to extract the RDS data of the all multiplexed broadcast signals at a time. Instead, the indispensable PI code is preferentially extracted from these RDS data, and the extracted PI code is preferentially stored and updated in the memory 7.
[0044]
The receiving means described in the claims is the main tuner section 11A and the sub tuner section 11B, the data extracting means is the main RDS decoder 14A and the sub RDS decoder 14B, the storage means is the memory 7, and the special information extracting means is special information. The extraction unit 21, the normal information extraction unit corresponds to the normal information extraction unit 22, and the data update unit corresponds to the data update unit 23.
[0045]
Next, the operation of the RDS broadcast receiving apparatus 1 showing this embodiment will be described.
[0046]
3 and 4 are flowcharts showing the processing operation of the system microcomputer 8A related to the RDS data update processing.
[0047]
In FIG. 3, the system microcomputer 8A receives the broadcast station within the FM broadcast band received last as the last station while seeing the interval between reception of the TMC data (step S11). It is assumed that the last station stores the reception frequency of the last received broadcast station in the memory 7 in advance.
[0048]
The system microcomputer 8A determines whether or not the PI code extraction operation of RDS data for all broadcast stations in the receivable FM broadcast band has been completed (step S12).
[0049]
If the PI code extraction operation has not been completed for all broadcasting stations, the system microcomputer 8A steps up the receiving frequency of the currently receiving broadcasting station (step S13), and next to the FM broadcasting band that can be received. Execute reception operation to the broadcasting station.
[0050]
Next, the system microcomputer 8A determines whether or not the reception state of the currently receiving broadcast station is good (step S14). Note that this determination processing is determined based on, for example, the received electric field strength.
[0051]
When it is determined that the receiving state of the currently receiving broadcast station is good, the system microcomputer 8A starts an RDS station recognition timer that sets a time for identifying that the currently receiving broadcast station is an RDS station. (Step S15).
[0052]
When the RDS station recognition timer starts, the system microcomputer 8A determines whether or not the currently receiving broadcast station is identified as an RDS station (step S16).
[0053]
If the currently receiving broadcast station is not identified as the RDS station, the system microcomputer 8A determines whether or not the RDS station recognition timer started in step S15 has expired (step S17).
[0054]
If the RDS station recognition timer has not expired, the system microcomputer 8A continues the determination operation in step S16. If the RDS station recognition timer has expired, the system microcomputer 8A determines that the currently receiving broadcast station is not an RDS station. Then, the process proceeds to step S12.
[0055]
In addition, when the currently receiving broadcast station is identified as the RDS station, the system microcomputer 8A starts an RDS data extraction operation for extracting RDS data from the currently received RDS station through the sub RDS decoder 14B. (Step S18).
[0056]
Next, when the RDS data extraction operation is started in step S18, the special information extraction unit 21 of the system microcomputer 8A starts a PI code extraction timer for preferentially extracting PI codes (step S19). It is determined whether a PI code has been extracted from the RDS data of the receiving RDS station (step S20).
[0057]
If the data update unit 23 of the system microcomputer 8A has extracted the PI code from the RDS data of the currently received RDS station in step S20, the PI code is obtained in step S20 from the start of the RDS data extraction operation in step S18. The PI code extracted before extraction and the RDS data other than the PI code are stored and updated in the memory 7 (step S21), and the process proceeds to step S12.
[0058]
In addition, the memory update by the data update unit 23 in step S21 is performed by extracting the AF list (F-31) in addition to the PI code (PI-03) from the currently received RDS station between step S18 and step S20. Then, as shown in FIGS. 2A to 2B, the AF list (F-31) is stored and updated in association with the PI code (PI-03).
[0059]
If the system microcomputer 8A has not extracted the PI code from the multiplex broadcast signal of the RDS station currently being received in step S20, the system microcomputer 8A determines whether the PI code extraction timer started in step S19 has timed out. Determination is made (step S22).
[0060]
If the PI code extraction timer has not expired, the system microcomputer 8A proceeds to step S20 to determine whether or not the PI code has been extracted. If the PI code extraction timer has expired, the system microcomputer 8A performs PI. It is determined that the code could not be extracted, and the process proceeds to step S12 without executing the storage update of the RDS data from this RDS station.
[0061]
If the data update unit 23 cannot extract the PI code of the currently received RDS station, even if RDS data other than this PI code, such as an AF list, is extracted, the update target of the extracted AF list is not updated. Since it cannot be recognized, the storage update of the RDS data is not executed. Further, if the PI code is extracted after the AF code, the PS data, the TMC determination flag, etc. are extracted, for example, within the time of the PI code extraction timer, the data update unit 23 naturally uses this PI code. Correspondingly, the previously extracted AF list, PS data, TMC determination flag, and the like are stored and updated in the memory 7.
[0062]
If the system microcomputer 8A completes the PI code extraction operation of the RDS data for all broadcast stations in the FM broadcast band in step S12, the system microcomputer 8A proceeds to M1 shown in FIG.
[0063]
In M1 shown in FIG. 4, the system microcomputer 8A starts a data update timer in order to extract the latest RDS data for all broadcast stations in the receivable FM broadcast band (step S31).
[0064]
The system microcomputer 8A determines whether or not the data update timer has expired (step S32). If the data update timer has not expired, the system microcomputer 8A steps up the reception frequency of the currently receiving broadcast station by one (step S33) and moves to the next broadcast station of the receivable FM broadcast band. Execute the receiving operation.
[0065]
The system microcomputer 8A determines whether or not the reception state of the currently receiving broadcast station is good (step S34). When it is determined that the receiving state of the currently receiving broadcast station is good, the system microcomputer 8A starts an RDS station recognition timer that sets a time for identifying that the currently receiving broadcast station is an RDS station. (Step S35).
[0066]
When the RDS station recognition timer starts, the system microcomputer 8A determines whether or not the currently receiving broadcast station is identified as an RDS station (step S36).
[0067]
If the broadcasting station currently receiving is not identified as the RDS station, the system microcomputer 8A determines whether or not the RDS station recognition timer started in step S35 has expired (step S37).
[0068]
If the RDS station recognition timer has not expired, the system microcomputer 8A continues the determination operation of step S36. If the RDS station recognition timer has expired, the system microcomputer 8A determines that the currently receiving broadcast station is not an RDS station. Then, the process proceeds to step S32.
[0069]
In addition, when the currently receiving broadcast station is identified as the RDS station, the system microcomputer 8A starts an RDS data extraction operation for extracting RDS data from the currently received RDS station through the sub RDS decoder 14B. (Step S38).
[0070]
When the system microcomputer 8A starts the RDS data extraction operation through the sub RDS decoder 14B, the system microcomputer 8A starts a PI code extraction timer for preferentially extracting the PI code (step S39), and the RDS of the currently receiving RDS station. It is determined whether a PI code has been extracted from the data (step S40).
[0071]
If the system microcomputer 8A has extracted the PI code from the currently receiving RDS station, the system microcomputer 8A has a detailed data extraction timer for extracting RDS data other than this PI code, such as the AF list, TMC determination flag, and PS data. Start (step S41).
[0072]
When the detailed data extraction timer starts, the system microcomputer 8A determines whether or not RDS data other than the PI code, such as PS data and TMC determination flag, can be extracted from the currently receiving RDS station (step S42). ).
[0073]
If the data updating unit 23 of the system microcomputer 8A can extract the PS data, the TMC determination flag, etc., the RDS data is stored and updated in the memory 7 as the latest RDS data in association with the PI code. (Step S43), the process proceeds to Step S32.
[0074]
Note that the storage update by the data updating unit 23 in step S43 is performed by the PS data (PS-03) and the TMC determination flag (ON) in addition to the PI code (PI-03) from the RDS station currently receiving in step S42. If it is determined that the data has been extracted, PS data (PS-03) and TMC determination flag (ON) are stored in association with the PI code (PI-03) as shown in FIGS. 2 (b) to 2 (c). Will be updated. When other network data (RDS-03) is extracted by the operation from the start of the RDS data extraction operation in step S38 to step S42, the other network data (RDS) is associated with this PI code (PI-03). -03) is stored and updated.
[0075]
If it is determined in step S40 that the PI code has not been extracted, the system microcomputer 8A determines whether or not the PI code extraction timer started in step S39 has expired (step S44). If the PI code extraction timer has not expired, the system microcomputer 8A proceeds to step S40 to monitor the PI code extraction, and if the PI code extraction timer has expired, proceeds to step S32. To do.
[0076]
If the PS microcomputer or the TMC determination flag is not extracted in step S42, the system microcomputer 8A determines whether or not the detailed data extraction timer started in step S41 has expired (step S45). If the detailed data extraction timer has not timed out, the data updating unit 23 of the system microcomputer 8A proceeds to step S42 to monitor the extraction of PS data and TMC determination flag, and the detailed data extraction timer has timed out. If so, the process proceeds to step S43 in order to store and update the RDS data extracted from the start of the RDS data extraction operation in step S38 until the detailed data extraction timer expires in step S45 in association with the PI code. .
[0077]
If the data update timer has expired in step S32, the system microcomputer 8A stores the currently received broadcast station as the last station and stores the received frequency of the last station in the memory 7 as the last frequency. Every time (step S46), the reception operation of the TMC data of the last received TMC station is started (step S47), and this processing operation is completed.
[0078]
According to the RDS data update process shown in FIGS. 3 and 4, the PI code is preferentially used from the RDS data for all the RDS stations in the receivable FM broadcast band in the processing operations from step S12 to step S22 shown in FIG. The extracted PI codes are preferentially stored and updated in the memory 7, and the RDS data extracted until the PI codes for each RDS station are extracted can also be stored and updated.
[0079]
Further, according to the RDS data update processing, the PI code is obtained from the RDS data for all the RDS stations in the FM broadcast band that can be received after the above-described PI code storage update in the processing operations from step S31 to step S43 shown in FIG. In addition, the latest RDS data other than the PI code can be stored and updated in the memory 7.
[0080]
When the data update timer expires in step S32 shown in FIG. 4, the process of storing and updating the latest RDS data is completed and TMC data is received. Therefore, within the receivable FM broadcast band Although there is a possibility that the storage update of RDS data other than the PI code for all RDS stations will end in the middle, the RDS data from the RDS station that ended in the last half Since the RDS data update process is executed again to execute the storage update, the latest RDS data of all the RDS stations can be finally stored and updated in the memory 7.
[0081]
According to the present embodiment, PI codes are preferentially extracted from all RDS stations within the receivable FM broadcast band, these PI codes are preferentially stored and updated in the memory 7, and then RDS other than the PI codes is used. Data is extracted and RDS data other than these PI codes are stored and updated in the memory 7, that is, RDS data of all RDS stations are not stored and updated at one time. Since the PI code required for memory update is preferentially stored and updated, for example, the minimum required RDS data is stored from all RDS stations in the FM broadcast band without greatly reducing the time to receive TMC data. Can be updated.
[0082]
In the above embodiment, the PI code is preferentially stored and updated in the memory 7 from all RDS stations in the receivable FM broadcast band. However, for example, a PTY code may be used instead of the PI code.
[0083]
【The invention's effect】
According to the multiplex broadcast receiving apparatus of the present invention configured as described above, special information data is preferentially extracted from all multiplex broadcast signals in the broadcast band, and these special information data are preferentially stored in the storage means. After the update, the information data other than the special information data is extracted, and the information data other than the special information data is stored and updated in the storage means, that is, all the information data of all the multiplexed broadcast signals are stored and updated at one time. Instead, the special information data, which is the minimum necessary information data, is preferentially stored and updated, so that, for example, within the broadcast band without greatly reducing the time to receive TMC data. Thus, the minimum necessary information data can be efficiently stored and updated from all the multiplex broadcast signals.
[0084]
According to the multiplex broadcast receiving apparatus of the present invention, the program identification code is preferentially extracted from the information data, and after the program identification code is preferentially stored and updated in the storage means, information data other than the program identification code is stored. This information data is extracted and stored in the storage means, that is, it is generally possible to extract in a short time instead of storing and updating all information data of all multiplexed broadcast signals at once. Since the program identification code required for data storage update is preferentially stored and updated, for example, the necessary minimum information can be obtained from all multiplexed broadcast signals within the broadcast band without greatly reducing the time to receive TMC data. Data can be stored and updated efficiently.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration inside a system microcomputer, which is a main part of an RDS broadcast receiving apparatus showing an embodiment of a multiplex broadcast receiving apparatus of the present invention.
FIG. 2 is an explanatory diagram briefly showing an example of memory update contents by a data update unit according to the present embodiment;
FIG. 3 is a flowchart showing a processing operation of a system microcomputer related to an RDS data update process according to the present embodiment.
FIG. 4 is a flowchart showing a processing operation of a system microcomputer related to an RDS data update process according to the present embodiment.
FIG. 5 is an explanatory diagram showing a data format configuration of 8A group RDS data used for transmitting TMC data;
FIG. 6 is a block diagram showing a schematic configuration inside an RDS broadcast receiving apparatus which is a general multiplex broadcast receiving apparatus.
[Explanation of symbols]
1 RDS broadcast receiver (multiplex broadcast receiver)
7 Memory (memory means)
11A Main tuner section (reception means)
11B Sub tuner (reception means)
14A RDS decoder for main (data extraction means)
14B RDS decoder for sub (data extraction means)
21 Special Information Extraction Unit (Special Information Extraction Means)
22 Normal information extraction unit (normal information extraction means)
23 Data update unit (data update means)

Claims (2)

A receiving means for receiving a multiplex broadcast signal obtained by multiplexing a plurality of types of information data, a data extracting means for extracting the plurality of types of information data from the multiplex broadcast signal received by the receiving means, and the data extracting means Multiplex having storage means for storing a plurality of types of extracted information data, and data updating means for storing and updating the newly extracted information data in the storage means when new information data is extracted by the data extraction means A broadcast receiving device,
The data extraction means includes
Special information extraction means for preferentially extracting special information data included in the plurality of types of information data from all multiplex broadcast signals within the broadcast band of the multiplex broadcast signal, and all multiplex broadcast signals by the special information extraction means Normal information extraction means for extracting the plurality of types of information data other than the special information data after extracting the special information data from
The data update means includes
The special information data extracted by the special information extraction unit is preferentially stored and updated in the storage unit, and then the information data extracted by the normal information extraction unit is stored and updated in the storage unit. Broadcast receiving device. The special information data is
A program identification code for identifying a broadcast program,
The data update means includes
The program identification code extracted by the special information extraction unit is preferentially stored and updated in the storage unit, and then the information data extracted by the normal information extraction unit is stored and updated for each program identification code. The multiplex broadcast receiver according to claim 1.

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