JPH08204593A - Reception equipment for multiplex broadcasting - Google Patents

Abstract

PURPOSE: To provide a multiplex broadcasting reception equipment which enables the user of a vehicle to enjoy TMC data corresponding to the region, where the vehicle provided with the reception equipment exists at present, by easy operation. CONSTITUTION: An FM tuner 12 which receives the broadcasted radio wave where RDS data is multiplexed and a memory 20 where received RDS data is stored are provided, and a PI code included in this RDS data is extracted, and this extracted PI code is stored in the memory 20. The broadcasted radio wave where RDS data related to TMC data is multiplexed is received by the FM tuner 12, and PI code is extracted from RDS data related to received TMC data. A microcomputer 24 for TMC and a microcomputer 25 for system store TMC data, which is related to the same PI code as the PI code stored in the memory 20, in the memory 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplex broadcast receiver for receiving data multiplexed on broadcast waves, such as traffic information.

[0002]

2. Description of the Related Art In recent years, traffic accidents, road works, etc. have frequently occurred along with an increase in traffic volume, which causes traffic congestion. Traffic information for notifying such traffic congestion occurrence, etc. There has been a trend to alleviate the traffic congestion and the like by notifying the driving driver via radio waves such as radio broadcasting.

In view of such a trend, for example, as a radio broadcast, an entertainment program band or a news program band such as a normal broadcast program is used, and the traffic information is announced in the program band so that the traffic information concerned is announced. There is a service that provides to radio listeners.

[0004] However, according to such a service, a radio listener who is not interested in the traffic information hears the traffic information that he / she does not want to hear, and the broadcast program is interrupted, which causes a great deal of damage to the radio listener. A situation that caused discomfort occurred.

In order to overcome these problems, there is a traffic information broadcasting station which mainly broadcasts traffic information programs which provide traffic information to radio listeners. It should be noted that the traffic information broadcasting station also broadcasts not only traffic information programs but also ordinary broadcast programs.

As such traffic information broadcasting, ARI (Autofahrer Rundfunkt Information) broadcasting is widely known, mainly in Europe.

The ARI broadcast is a multiplex broadcast in which data of a program related to traffic information is multiplexed with an FM broadcast radio wave which is a normal broadcast radio wave.

Now, the ARI broadcast will be described.

The data multiplexed in the ARI broadcast includes an SK (Sender Kennung) signal which is an identification signal indicating that the receiving broadcast station is a traffic information broadcast station, and a broadcast program related to the traffic information. There is a DK (Durchsage kennung) signal which is an identification signal indicating that the start of the.

According to the ARI-broadcast-compatible receiver that receives the ARI broadcast, the traffic information broadcast station is identified according to the SK signal, and the traffic information broadcast program is identified according to the DK signal. Since these identification notifications are displayed and output on the display unit of the receiving apparatus, it is very convenient for the driving driver who wants the traffic information because the traffic information broadcasting station and the start of the broadcasting can be recognized.

In addition to the ARI broadcast, there is RDS broadcast. The RDS broadcast is a multiplex broadcast widely known mainly in Europe as in the ARI broadcast.
In addition to the program-related data related to traffic information compared to I-broadcasting, data such as program-related information related to a normal broadcast program is multiplexed on a normal FM broadcast wave, and the multiplexed data is decoded by the receiving side. By doing so, various services are provided to listeners of the radio broadcast.

The RDS broadcasting is effective mainly in an area where many broadcasting stations form a network to broadcast the same program, and it is effective outside the frequency band of the FM modulated wave.
The third harmonic of the stereo pilot signal of kHz is 5
A radio data signal (hereinafter, simply referred to as RDS data) is obtained by amplitude-modulating the subcarrier with a data signal indicating data related to program information, traffic information, etc., which is filtered and bi-phase coded with 7 kHz as a subcarrier. Then, the amplitude-modulated subcarrier is frequency-modulated as a main carrier to be broadcast.

FIG. 4 is an explanatory diagram showing a basic baseband coding structure of the RDS data.

The RDS data is 1 as shown in FIG.
Each group is composed of 4 blocks of 26 bits, each group consisting of 04 bits as one group, and each block is composed of a 16-bit information word (m0
˜m15) and a 10-bit check word and offset word (c′0 to c′9). The R
The transmission rate of DS data is 1187.5 bit / sec
Is.

In block A, program identification data (hereinafter simply referred to as PI code) indicating a network composed of country name data and program data is shown, and in block B, it is a traffic information broadcasting station that broadcasts traffic information programs. The traffic information broadcasting station identification data (hereinafter, simply referred to as TP code) and the traffic announcement identification data (hereinafter, simply referred to as TA code) indicating that the broadcast program related to the traffic information starts are the same program in the C block. Data relating to the frequency of each station of the network station group that is broadcasting, that is, alternative station frequency data (hereinafter simply referred to as AF data)
However, in the block D, broadcasting station name data such as a broadcasting station name and a network name (hereinafter, simply referred to as PS data) are arranged. The PI code is composed of three elements, that is, 4-bit country name data, 4-bit area data, and 8-bit program data.

Further, each group has four groups depending on the contents.
The bits are classified into 16 types of types 0 to 15 and two versions A and B are defined for each type (0 to 15). These identification codes are arranged in block B. There is.

Normally, as the type defined in the version A, the block A always includes the PI code, but as the type defined in the version B, the block is added in addition to the block A. The C code also includes the PI code. However, the version B concerned
Very few types are sent.

RDS for receiving such RDS data
According to the receiving device, the AF data obtained by demodulating at the time of receiving the RDS data is captured and stored, and when the reception level at the currently receiving broadcasting station is lowered due to disturbance such as multipath interference, first. There is an automatic tracking system that selects an alternative station that is another network station having a good reception level based on the stored AF data, and by the automatic tracking system, without being affected by disturbance,
It is possible to provide the user with a broadcast of the same program that is always in a good reception state.

Further, according to the RDS broadcasting-compatible receiving device for receiving the RDS broadcasting, the traffic information broadcasting station is identified according to the TP code, and the traffic information broadcasting program is performed according to the TA code. Since the identification is performed and these identification notifications are displayed and output on the display unit of the receiving device, it is very convenient for the driving driver who wants the traffic information because it can recognize the traffic information broadcasting station and the start of the program broadcasting. Is.

However, the ARI broadcast and the RD
According to the S broadcasting, there is a first problem that a broadcasting frame of a traffic information broadcasting program is enlarged in order to provide a large amount of traffic information to a user due to traffic congestion during commuting or vacation.

Further, even a traffic information broadcasting station which generally broadcasts traffic information programs does not sequentially broadcast the traffic information to users, but the traffic information is broadcast every hour or every 30 minutes. It is broadcast as a program. Therefore, there is a second problem that the user is involved in the traffic jam, for example, when he / she hits a point where the traffic jam occurs during the time when the traffic information program is not broadcast.

Further, in this traffic information program, even if only the traffic information desired by the user, for example, the traffic information in the area A, is desired to be heard, the traffic information in other areas must be listened to. There was a third problem that it was not easy to use.

In addition, in the traffic information program, when the driving driver moves across multiple countries in a region such as Europe where the language is different, the language being listened to cannot be understood by the driving driver. In the case of a national language, there is a fourth problem that the traffic information cannot be understood in the language even if the user listens to the traffic information program.

Therefore, in order to overcome these first to fourth problems, the TMC (Traffi) using the RDS broadcasting is used.
c Message Channel) is being considered.

The TMC is used for broadcasting using, for example, the 8A group in the RDS data, that is, the group 8 defined in version A. Figure 5
[Fig. 3] is an explanatory diagram showing a baseband coding structure of an 8A group for transmitting the TMC.

In FIG. 5, the block A contains the PI code. The block B includes a 4-bit group type identification code for identifying the 8A group type and various codes related to a message management and extension system. For example, a 1-bit short indicating that the message is a short message. Message code (Sh
ort Message; S) and a single group message (Si
1-bit group message identification code (G) indicating whether a single message is transmitted over multiple group data (Multi Group Message), and the approximate congestion time. 3-bit congestion time code (Duration and Persistence of th
e diturbance (DP) etc. The traffic jam time code (DP) is used to indicate the traffic jam time in eight stages (0 to 4 hours).

In the block C, for example, a detour identification code (Diversion bit; D) indicating the presence or absence of a detour and a 3-bit EXT including a location offset address are included.
ENT code and 11-bit EVEN indicating information such as weather conditions, construction, traffic congestion, public transport, etc.
And a T code.

Further, in block D, 1 indicating position information is shown.
It contains a 6-bit LOCATION code.

In the LOCATION code, for example, in Germany, for example, addresses 1 to 16 are assigned to each state, followed by counties, administrative divisions and local autonomous regions, and then main roads such as autobahns and national highways. It is assigned and subsequently subdivided into specific areas such as each area and road entrances and exits in a hierarchical order such as an autobahn exit, a grade separation and a service area, and then a road from the main road.

Further, if the extension system using these codes is used, various kinds of information and the like which appropriately instruct a detour for traffic congestion are transmitted.

Next, a general TMC-compatible receiving apparatus for receiving and decoding the TMC data will be described. FIG.
FIG. 3 is a block diagram showing an outline of a general TMC-compatible receiver.

In FIG. 1, the TMC-compatible receiver is provided with not only a radio tuner function but also a CD autochanger function and a tape deck function (not shown).
The radio tuner function includes a receiving antenna 11 that receives a broadcast wave including a program broadcast and TMC data such as RDS data that is multiplexed in the program broadcast, and a desired reception antenna 11 that receives the broadcast wave. FM tuner 12 for receiving FM broadcast waves, and the receiving antenna 1
AM tuner 1 for receiving desired AM broadcast radio wave at 1
3, a system tuning unit 14 for switching the tuning system of the FM tuner 12 and the AM tuner 13,
A source switching unit 16 for switching and selecting a broadcast signal received by the M tuner 12 or the AM tuner 13 and an audio signal generated via a card interface 15 described later.
An audio amplifier 17 for amplifying the switching-selected audio signal or broadcast signal, a speaker 18 for audio output of the amplified audio signal or broadcast signal, and an RDS from the broadcast signal received by the FM tuner 12. An RDS decoder 19 for extracting data, a memory 20 for storing various data such as RDS data extracted by the RDS decoder 19, an operation unit 21 for inputting various commands, and various information for display output. A display unit 22, a card interface 15 that connects the receiving device to a TMC card 23 described later, and a TMC that extracts and controls TMC data in RDS data received based on the data recorded in the TMC card 23. A data microcomputer 24,
It has a system microcomputer 25 for controlling the entire receiving device.

The operation section 21 has a TMC key 21a for calling TMC data and a preset key group 21b for calling a preset desired broadcasting station by one-touch operation.

Further, although the memory 20 has a plurality of memory areas for storing various data, among them, a preset key memory area corresponding to each preset key group 21b (hereinafter, simply referred to as a preset area). There is).

The TMC card 23 has data contents corresponding to each code in the TMC data included in the transmitted RDS data and language data for converting the data contents into the user's native language. Etc. are stored.

Further, the TMC data microcomputer 24
Extracts only the TMC data from the RDS data extracted by the RDS decoder 19, and extracts the extracted TM.
The data content of the TMC data is decoded based on the C data and the data obtained from the TMC card 23, the decoded TMC data is stored in the memory 20, and the TMC data stored in the memory 20 is stored. The voice signal and the display signal are generated based on the language data of the TMC card 23.

The operation of the TMC-compatible receiver will be described below.

The RDS decoder 19 of the TMC-compatible receiving apparatus has the receiving antenna 11 and the FM tuner 12.
RDS data is extracted from the FM broadcast signal obtained via the, and only TMC data is supplied from the extracted RDS data to the TMC microcomputer 24.

The TMC microcomputer 24 decodes the TMC data obtained from the RDS decoder 19 based on the data obtained from the TMC card 23 via the card interface 15, and the decrypted TMC data is used for the system. The memory 2 via the microcomputer 25
Store at 0.

Next, when the user of the TMC-compatible receiving device reads the TMC data stored and held in the memory 20, the system microcomputer 25 is operated in response to a predetermined operation from the operation unit 21. The TMC data is read from the memory 20 via the
The MC data is supplied to the TMC microcomputer 24.

The TMC microcomputer 24 generates display data and voice data from the supplied TMC data based on the language data from the TMC card 23, and outputs voice data related to the generated TMC data to the card interface. The data is supplied to the source switching unit 16 via 15 and the display data relating to the generated TMC data is displayed and output to the display unit 22 via the system microcomputer 25. The system microcomputer 25 is
When voice output related to the TMC data is requested in response to a predetermined operation from the operation unit 21, a source switching control signal for voice-outputting the voice data via the card interface 15 is supplied to the source switching unit 16. I shall.

Therefore, according to the TMC of the RDS broadcast, the TMC transmitted without the broadcast program for traffic information.
Since the data itself is traffic information and the TMC-compatible receiving apparatus receives the TMC data to be transmitted and sequentially stores the TMC data in the memory 20, the broadcast program being listened to may be interrupted during the program. It is possible to overcome the situation that causes interruption.

Further, according to the TMC, the number of groups transmitted per second is 11.5, and when TMC data of 8A group is transmitted, it often occurs during commuting or vacation. Since even 100 consecutive messages that require a large amount of traffic information related to traffic congestion are transmitted in about one and a half minutes, detailed traffic information can be provided to the user in real time.

Further, according to the TMC, since the traffic information of each region such as each state or each highway is subdivided, detailed information is obtained not only at each region but also at a point such as a branch point of the highway. Traffic information can be provided to the user.

Further, according to the TMC-compatible receiving apparatus for receiving the TMC, the transmitted TMC data is sequentially stored in the memory 20, so that the traffic information of each desired point is desired by the user. A user who can obtain the traffic information of the desired area while listening to the traffic information in the area other than the desired area by listening to the traffic information broadcast program as in the conventional case. The usability on the side can be greatly overcome.

Further, according to the TMC data, even if the driving driver moves across multiple countries of different languages, if the language data by the TMC card 23 is used, the TMC data is broadcast in his / her native language. Even in areas where there is no
It is possible to recognize TMC data such as traffic information in a desired area in a native language.

[0047]

However, the R
According to the TMC-compatible receiving device that receives TMC data in DS broadcasting, T multiplexed in the incoming broadcast wave is used.
The MC data is received and the received TMC data is sequentially stored in the memory 20.
0 stores TMC data related to all regions,
For example, when calling the TMC data corresponding to the current location such as the current location of the vehicle equipped with the receiving apparatus or the surrounding area of the current location, the user of the receiving apparatus has to perform a complicated area selecting and calling operation. However, there was a problem that the operation load was very high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a user of a vehicle equipped with the receiving apparatus with TMC data corresponding to the current area of the vehicle by a simple operation. An object is to provide a multiplex broadcast receiving device that can be enjoyed.

[0049]

In order to achieve the above object, a multiplex broadcasting receiver of the present invention stores receiving means for receiving broadcast radio waves in which multiplex data is multiplexed, and the received multiplex data. Storage means, area code extraction means for extracting the area identification code included in the multiplex data,
The extracted area identification code is stored in the storage means, the broadcast wave obtained by multiplexing the multiplexed data related to traffic data is received by the reception means, and the area code is extracted from the multiplexed data related to the received traffic data. The present invention is characterized by further comprising: control means for extracting the area identification code by the extraction means, and storing the traffic data related to the same area identification code as the area identification code stored in the storage means in the storage means.

[0050]

With such a configuration, according to the multiplex broadcasting receiver of the present invention, for example, the multiplex data is received from the local station corresponding to the current area of the vehicle equipped with the receiver,
An area identification code is extracted from the received multiplex data by the area code extraction means, the extracted area identification code, that is, the area identification code of the local station is stored in the storage means, and then the traffic data is multiplexed. The area identification code is extracted from the traffic data by the area code extraction means, and the extracted area identification code and the same area as the area identification code of the local station stored in the storage means are received. Since the traffic data corresponding to the identification code is stored in the storage means, the user of the vehicle is involved in the area selection calling operation for calling the traffic data corresponding to the current location of the vehicle and the surrounding area of the current location. The operation can be facilitated.

[0051]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A TMC-compatible receiving apparatus to which the multiplex broadcasting receiving apparatus of the present invention is applied will be described below with reference to the drawings. The same components as those of the general TMC-compatible receiver shown in FIG.
The description of the configuration and operation is omitted.

T to which the multiplex broadcasting receiver of the invention is applied
In the MC-compatible receiver, for example, a peripheral area TMC data memory processing function that enables easy calling of TMC data corresponding to the current area of the vehicle equipped with the receiver or a surrounding area of the current area is provided. Have The memory 20 shown in FIG. 1 of the TMC-compatible receiver has a plurality of memory areas, but mainly stores a reception frequency of a local station, which will be described later, and RDS data obtained from the local station. The first memory area, the second memory area for storing TMC data of all areas obtained from the TMC station, and the TMC data corresponding to the current area among the TMC data stored in the second memory area are stored. It has a third memory area and the like.

Next, the operation of the TMC-compatible receiver will be described. 2 and 3 are flowcharts showing the processing operation of the system microcomputer 25 in the peripheral area TMC data memory processing of the TMC-compatible receiver.

The system microcomputer 25 shown in FIG. 2 determines whether or not the TMC key 21a of the operation unit 21 has been pressed (step S11). If the TMC key 21a is input, the FM tuner 12 is caused to execute a seek-up operation of sequentially receiving each broadcasting station from a low frequency region to a high frequency region (step S12), and the seek operation is performed. It is determined whether the receiving station received by the up operation is an RDS station (step S1).
3).

If the receiving station is an RDS station, the RD
It is determined whether the S station is a local station (step S
14). The local station is a broadcasting station in a region corresponding to the current location of the vehicle equipped with the receiving device.

If the RDS station is a local station, the reception frequency of the local station and the RDS data transmitted from the local station are stored in the first memory area of the memory 20 (step S15), and It is determined whether the TMC data is already stored and held in the second memory area (step S16). Incidentally, step S15
RD of the local station stored in the first memory area at
PI code is extracted from the S data, and the extracted PI is
A PI code in the surrounding area is also calculated based on the code via the TMC card 23 and the TMC microcomputer 24, and the calculated PI code is also stored in the first memory area together with the RDS data of the local station. And

If there is TMC data already stored and held in the second memory area in step S16, the PI code included in the RDS data of the local station stored in the first memory area and the periphery of the local station. Corresponding TMC with the same PI code as the local PI code
It is determined whether or not data (hereinafter, simply referred to as corresponding data) is stored and held in the second memory area (step S17). If there is corresponding data in the second memory area, the process proceeds to M1 shown in FIG.

If the TMC key 21a is not entered in step S11, the surrounding area TMC
The processing operation of the data memory processing ends.

Further, in step S13, the receiving station determines that the RDS
If it is not a station, or the RD received in step S14
If the S station is not the local station, the process proceeds to step S12.

If the TMC data is not stored and held in the second memory area in step S16, it is determined whether or not the receiving station currently receiving is the TMC station (step S18). If the receiving station is a TMC station, the TMC data received from the receiving TMC station is stored in the second memory area (step S19), and the process proceeds to step S17.

Further, in step S18, the receiving station is the TMC.
If it is not a station, the FM tuner 12 is caused to execute a seek-up operation (step S20), and step S1
Move to 8.

Next, the system microcomputer 25 proceeds to step S
If there is corresponding data in the second memory area at 17, it will be shown in FIG.
In M1, the relevant data is extracted from the second memory area (step S31), and the extracted relevant TM is obtained.
The C data is stored in the third memory area (step S3
2) Based on the reception frequency of the local station stored and held in the first memory area, the local station is made to receive and it is determined whether or not the reception sensitivity is good (step S3).
3). If the reception sensitivity of the local station is good, the peripheral area TMC data memory processing is ended. The local station stored in the first memory area is received in step S33 because the error variation of the target area in the surrounding area TMC data memory processing is performed while the vehicle equipped with the receiving device is moving. This is a process for suppressing.

If the reception sensitivity of the local station is not good in step S33, the process proceeds to M2 shown in FIG.

Therefore, according to the TMC-compatible receiver, for example, the RDS broadcast of the local station corresponding to the current area of the vehicle equipped with the receiver is received and the RDS data is extracted from the received RDS broadcast. , The PI code is extracted from the RDS data, and the extracted P
A PI code in the peripheral area of the local station is calculated based on the I code, and the PI code relating to the local station and the peripheral area of the local station is stored in the first memory area of the memory 20 and then converted into TMC data. T involved
The FM tuner 12 receives the broadcast radio wave in which the MC data is multiplexed, the received TMC data is stored in the second memory area, and the PI code included in the TMC data stored in the second memory area is used. T having the same PI code as the PI code stored in the first memory area
Since the MC data is extracted from the second memory area and only the extracted relevant data is stored and held in the third memory area, the user can select the TMC corresponding to the current area such as the current area or the surrounding area of the current area. It is possible to significantly improve the operation related to the area selection calling operation for calling the data.

In the above embodiment, as shown in step S15 shown in FIG. 2, the reception frequency and RDS data of the local station and the PI related to the surrounding area of the local station.
Although the code is stored in the first memory area of the memory 20, it may be the memory of the system microcomputer 25.

In the above embodiment, the received TMC data of all areas is stored and held in the second memory area of the memory 20, and the corresponding data is stored in the second memory area of the memory 20 in step S32 shown in FIG. Although the data is stored in three memory areas, the corresponding data may be updated in the second memory area. In this case, the memory capacity of the memory 20 is reduced by the third memory area. be able to.

Further, in the above embodiment, if the receiving sensitivity of the local station stored in the first memory area in step S33 shown in FIG. 3 is good, the peripheral area TMC data memory processing is terminated. However, needless to say, the effect can be further enhanced by periodically performing the processing operation in step S33 until the peripheral area TMC data memory processing is canceled in response to a predetermined operation.

[0068]

According to the multiplex broadcasting receiver of the present invention configured as described above, for example, the multiplex data is received from the local station corresponding to the current area of the vehicle equipped with the receiver, and the reception is performed. An area identification code is extracted from the generated multiplex data by the area code extraction means, the extracted area identification code, that is, the area identification code of the local station is stored in the storage means, and then the traffic data is broadcast. An area identification code is extracted from the traffic data by the area code extraction means, and the extracted area identification code and the same area identification code as the area identification code of the local station stored in the storage means are received. Since the traffic data corresponding to is stored in the storage means, the user of the vehicle determines that the current location of the vehicle and the surrounding area of the current location. The current it is possible to facilitate the operation related to the regional selective call operations to call the traffic data corresponding to the region.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a general TMC-compatible receiver.

FIG. 2 is a TMC to which the multiplex broadcasting receiver of the invention is applied.
It is a flow chart which shows processing operation of a system microcomputer in peripheral area TMC data memory processing of a correspondence type receiver.

FIG. 3 is a TMC to which the multiplex broadcasting receiver of the invention is applied.
It is a flow chart which shows processing operation of a system microcomputer in peripheral area TMC data memory processing of a correspondence type receiver.

FIG. 4 is an explanatory diagram showing a basic baseband coding structure of RDS data.

FIG. 5 is an explanatory diagram showing a baseband coding structure of an 8A group for transmitting TMC.

[Explanation of symbols]

 12 FM tuner (reception means) 20 Memory (storage means) 24 TMC microcomputer (control means) 25 System microcomputer (control means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Rekichi Koyama 5-35-2 Hakusan, Bunkyo-ku, Tokyo Clarion Co., Ltd. (72) Inventor Masaki Sunaga 5-35-2 Hakusan, Bunkyo-ku, Tokyo Clarion Co., Ltd. (72) Inventor Tsutomu Yoshioka 5-35-2 Hakusan, Bunkyo-ku, Tokyo Clarion Co., Ltd. (72) Inventor Yuji Minegishi 5-35-2, Shirayama, Bunkyo-ku, Tokyo Clarion Co., Ltd.

Claims (1)

[Claims] 1. Receiving means for receiving broadcast radio waves multiplexed with multiplex data, storage means for storing the received multiplex data, and area code extracting means for extracting an area identification code included in the multiplex data. The extracted area identification code is stored in the storage means, the broadcast wave obtained by multiplexing the multiplexed data related to the traffic data is received by the receiving means, and the area is extracted from the multiplexed data related to the received traffic data. And a control means for extracting the area identification code by the code extraction means, and storing in the storage means traffic data related to the same area identification code as the area identification code stored in the storage means. Broadcast receiver.