JPH0832472A - Multiplex broadcast receiver - Google Patents

Abstract

PURPOSE:To allow an FM multiplex broadcast receiver to select simply and surely desired road information. CONSTITUTION:An input signal via an antenna 1, a front end 2, a PLL circuit 3, an intermediate frequency amplifier and detection section 4 is demodulated by a VICS data demodulation circuit 7 and processed as image data by a display controller 20 via a control section 9 and displayed on a display device 14. The displayed content is selected by a selection key 15a and when a pattern being displayed is a desired road pattern, a preset key 15b is depressed and a reference link number/secondary mesh number in the information is stored in a RAM 8 and only the desired road information is selectively displayed by the operation of the preset key 15b based on the stored reference link number/ secondary mesh number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for FM broadcasting, and more particularly to a service image of a program desired by a user can be easily displayed on the screen from among FM multiplex data obtained by receiving FM multiplex broadcasting. The present invention relates to a multiple broadcast receiver.

[0002]

2. Description of the Related Art Various information such as present location, destination guidance, parking lot guidance, traffic jam, traffic regulation, required time, news, weather forecast, etc. are provided to vehicles by wireless communication such as quasi-microwave beacons and FM multiplex broadcasting. Therefore, a road traffic information communication system (VICS) is being developed and put into practical use, which allows a driver to travel quickly to a desired place on an appropriate route while making a comprehensive judgment on various kinds of information. Among them, in FM multiplex broadcasting, traffic information, news, weather forecast, etc. are provided,
Traffic information includes wide area congestion information, traffic restrictions, required time,
Parking lot guides and the like are included, and programs are organized by content and by region, and the user can obtain a desired VICS service image by selecting a desired program.

FIG. 2 is an explanatory diagram of a program data format of FM multiplex broadcasting. The program header at the beginning is information that identifies the target of the program, and includes a service identification code (SI) that represents the type of service such as traffic information, news, weather forecast,
The program number indicating the number of the program in the same service, the total number of pages of the program, traffic congestion information, traffic restrictions, required time, content type code indicating the contents such as parking lot guidance, prefecture code indicating the target area and secondary It includes a mesh code, a VICS link code indicating a road type, and the like. The secondary mesh code is a code assigned to all roads existing in the mesh.

The page header is information for specifying the target of each page constituting the program, and includes the program number, the page number indicating the page number in the program, traffic congestion information, traffic regulation, required time, parking lot guidance. A content type code indicating the contents such as, a prefecture code indicating a target area, a secondary mesh code, and a reference link number for associating with a link on the map data are included. The page data includes header sentence data and body data.

The reference link number is a number assigned to each road related to traffic information, which is included in each secondary mesh. The secondary mesh is a secondary map section of 1/25000 topographic map. It is the division of the area by.

[0006]

Level 1 is included in the above information.
There are two types of text information and level 2 simple map / graphic information. This selection is mainly for level 2 map type, level 1,
Two types of links are shared (high speed, Shuto Expressway, main road types), and contents are shared between levels 1 and 2. Therefore, when the user needs to obtain road information when receiving level 1 of FM multiplex broadcasting by link / content type, the user must view the monitor screen in order to obtain that information. In such a state, it is necessary to select and send / return the received information and repeat the selection of the received information until the desired information appears on the screen. An object of the present invention is to simplify the trouble of selecting the received information and obtain desired road information by a simple operation.

[0007]

According to the present invention, the above-mentioned problem is solved by a means for demodulating the received VICS data of FM multiplex broadcasting, and an RA connected to the VICS data demodulating means.
In a multiplex broadcast receiver including M, a display controller for displaying the demodulated VICS data, and a display device, a PLL key for reception, which is connected to each unit and controls the selection key and a plurality of Provided with a control unit for inputting the operation of the operation unit having a preset key, selecting and displaying desired road information by operating the selection key, operating the preset key,
The reference link number / secondary mesh number of the selected and displayed information is stored in the RAM for each preset key, and the control unit stores the reference link number / secondary mesh number stored in the preset key in correspondence with the preset key operated thereafter. This can be solved by selectively displaying the road information having the secondary mesh number from the received information.

[0008]

The RAM connected to the VICS demodulation means stores the reference link number / secondary mesh number of the desired road information displayed on the display device by the control unit by operating the preset key. Since a plurality of preset keys are provided, a plurality of data can be preset. After that, by operating the preset key of the desired road, the control unit recognizes the information having the same number as the stored reference link number / secondary mesh number from the received information,
Sort and display.

[0009]

1 is a block diagram of a circuit of an embodiment of a multiplex broadcast receiver according to the present invention. In the figure, 1 is an antenna for reception, 2 is a front end, and a tuning circuit of a desired station is performed together with a PLL circuit 3 for tuning. Reference numeral 4 denotes an intermediate frequency amplification and detection section, the detection output of which is input to the stereo demodulation section 5, and its output is connected to the subsequent stages (not shown). Since the above circuit parts are known, detailed description thereof will be omitted.

Reference numeral 7 is a VICS data demodulation circuit which demodulates VICS data from the output of the intermediate frequency amplification and detection section 4, and writes and reads data to and from a RAM 8 connected thereto. 9 is the PLL circuit 3 and V
It is a control unit having a microcomputer configuration for controlling the ICS data demodulation circuit 7.

Reference numeral 20 is a display controller,
The VICS data obtained from the VICS demodulation circuit 7 via the control unit 9 is displayed on the display device 14, and the buffer memory 10 and the VICS image drawing unit 1 are provided.
1, a video RAM 12, and a conversion unit 13.

Reference numeral 15 denotes an operation unit, which is a selection key 15a for selecting information, and a plurality of preset keys 1 to be operated when desired road information is selected and displayed during reception of level 1.
5b, the operation state of each key is input to the control unit 9.

FIG. 4 is a flow chart showing the operation of the circuit of the present invention. The operation of road-based selective reception according to the present invention will be described with reference to FIG.

First, in the normal reception state, the operation unit 15
Information is selected and displayed by the selection key 15a (step 41), the VICS data is demodulated by the VICS data demodulation circuit 7, the data is processed by the display controller 20 and displayed on the display device 14, and the obtained information is displayed. It is checked whether the road is the road desired by the user (step 42). As a result, if the obtained information does not belong to the desired road, the process returns to step 41 and the selection and display of information is repeated.

In step 42, if the obtained information is for the desired road, the preset key 15
b is operated (step 43). By this operation, the control unit 9 changes from the header of the page data displayed on the screen to
The link type / secondary mesh number is stored in the RAM 8 and preset (step 44).

Thereafter, by operating the preset key 15b, selection and display according to the link type / secondary mesh number are performed (step 45), and the FM multiplex broadcast signal is received (step 46). It is checked whether the traffic information is obtained, that is, whether it is the same link type / secondary mesh number (step 47). If not, the process returns to step 46 and the FM multiplex reception is repeated again.

If the result at step 47 is desired, the control section 9 causes the display controller 20 and the display device 14 to display the data.

FIG. 3 shows an example of a screen displayed on the display device 14. In the figure, A is an example of the link type, and the type of road is displayed. Therefore, if "1" is selected here, B in the figure is displayed and the content type screen is displayed.
Content types such as traffic jam information, desired time, accident, traffic restrictions, cautions, warnings, parking lot guidance, etc. are displayed.

Further, if "1" is selected here, a screen for displaying traffic information of a specific route as in this example as VICS traffic information shown in FIG. By pressing the preset key 15b while the screen is displayed, the reference link number and the secondary mesh number of this information are input and stored in the RAM 8. Further level 2
By selecting, it is possible to obtain related map information as shown in FIG.

By providing a plurality of the preset keys 15b, even if there are a plurality of pieces of desired road information, the reference link number thereof can be stored in the memory, so that the reference link numbers can be selectively displayed.

In the above configuration, it is necessary to select and display desired information in order to store the desired information.
Since the selection and sending / returning of the received information must be repeated until it is obtained, the memory device, the CD-RO
The reference link number corresponding to the link type / related prefecture code / road name is stored in a memory such as M or a card ROM, and a road in a desired area is selected based on the stored information to be used as a multiplex broadcast receiver. , The reference link number corresponding to the link type / related prefecture identification code / road name is stored, and the information having the same prefecture identification code / reference link number is recognized from the received signal, selected, and displayed to drive. However, it is possible to save the trouble of initial setting and information selection.

[0022]

As described above, according to the present invention, the multiplex broadcast receiver is provided with the function of selecting and displaying the FM multiplex broadcast based on the reference link number, the reference link number / secondary mesh number of information being displayed on the screen. Since the memory function is provided, the reference link number / secondary mesh number is memorized when the desired road information is selectively displayed during the text information reception, and thereafter, only the desired road information is stored in the memorized reference link number. Since the / second mesh number can be selected and displayed as a reference, the labor for obtaining information is simplified, which is convenient for the user.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a circuit according to an exemplary embodiment of the present invention.

FIG. 2 is an explanatory diagram of a program data format of FM multiplex broadcasting.

FIG. 3 is an example of a display screen of the display device of the present invention.

FIG. 4 is a flowchart of the operation of the present invention.

[Explanation of symbols]

 1 Antenna 2 Front End 3 PLL Circuit 4 Intermediate Frequency Amplification and Detection Section 5 Stereo Demodulation Section 7 VICS Data Demodulation Circuit 8 RAM 9 Control Section 14 Display Device 15 Operation Section 15a Selection Key 15b Preset Key 20 Display Controller

Claims (1)

[Claims] 1. A multiplex broadcast including means for demodulating received VICS data of FM multiplex broadcast, RAM connected to the VICS data demodulating means, and a display controller and a display device for displaying the demodulated VICS data. In the receiver, connected to each of the above parts,
Moreover, while controlling the PLL circuit for reception, a control unit for inputting the operation of the operation unit including a selection key and a plurality of preset keys is provided, and desired road information is selected and displayed by operating the selection key, By operating the preset key, the reference link number / secondary mesh number of the selected and displayed information is stored in the RAM for each preset key, and the control unit responds to the preset key operated thereafter. Reference link number stored in the preset key /
A multiplex broadcast receiver characterized by selectively displaying road information having a secondary mesh number from received information.