JP2001196954A - Radio receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio receiver that can recognize a change of a reception station to a broadcast station as a network affiliate station from a reception broadcast station set by a user. SOLUTION: In the case that a broadcast station received at present is a broadcast station stored in advance in a preset memory 7, a display device 82 displays a corresponding preset number as it is, and when the broadcast station received at present is a network affiliate station, the display device 82 displays the preset number in a mode different from the display mode above, e.g. by blinking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver, and more particularly to a radio receiver useful for a radio data multiplex broadcasting system.

[0002]

2. Description of the Related Art As a data multiplex broadcasting system for radio, for example, in the European region, RDS for digitally multiplexing channel selection data and program identification data into FM radio broadcast signals to provide various services to vehicle drivers. (Radio Data System) has been put to practical use. Typical RDS services include a PI (program identification) service for identifying a country, a reception area, and a program name of a broadcast station, and a PS (reception station name display) service for displaying a received broadcast station name on a tuner display. There are an AF (similar program broadcast frequency list) service for displaying other broadcast station frequencies broadcasting the same program, a TP service for identifying a broadcast station of traffic information, and the like.

[0003] The AF service is provided with a search function for receiving another broadcasting station radio wave of the same program broadcast when the received electric field strength of the RDS radio wave transmitted from the broadcasting station by the in-vehicle tuner falls below a certain level. ing. In this search, an AF (alternative frequency) list transmitted from a broadcast station is stored in a memory in advance, and A
This is performed based on the F list. For example, when the radio wave intensity from a certain broadcasting station becomes weaker while driving in a car, another station transmitting the same broadcasting content is automatically received based on the AF list received in the receiving area. At that time, the AF list stored in the vehicle-mounted memory is updated to the AF list received in the area.

In the PI service, a broadcasting station is represented by a PI (program identification) code, a PI code of the receiving broadcasting station is detected from a received signal received by a radio receiver, and the broadcasting station and the PI code are detected. The indicated preset number is displayed on the display. That is, a preset number is assigned in advance to each of the receivable broadcast stations in a predetermined area, and the preset number corresponding to the PI code of the received broadcast station detected from the received signal is displayed on the display.

[0005]

The conventional RD
In the PI service of the S radio receiver, a preset number pre-assigned to each of the receiving broadcast stations in a predetermined area is displayed on the display, but the RDS broadcast station in the European area has a "separate PI station". (Affiliated family stations), the following problems occur. For example, a broadcast of “BBC R1” at a frequency of 90.0 MHz may be “BBC LOC” (local broadcast) as another PI station of “BBC R1” only during a certain time zone. In such a case, in the conventional radio receiver, the preset number corresponding to the currently receiving broadcast station stored in the preset memory in advance is displayed on the display, but when receiving another PI station, it is assigned to the other PI station. Since there is no preset number assigned, there is nothing to display on the display, and the preset number corresponding to the broadcast station that has been received up to that time is blank displayed. Therefore, there is a problem that the user cannot know the broadcasting station set by the user, that is, the preset number.

An object of the present invention is to provide a radio receiver capable of knowing a change of a receiving station from a receiving broadcasting station set by a user to a broadcasting station as an affiliate station.

[0007]

To solve the above-mentioned problems, a radio receiver according to the present invention employs the following characteristic configuration.

(1) A radio receiver that receives data of a data multiplex broadcasting system and displays received broadcasting station information based on a program identification code included in the data of the data multiplex broadcasting system. In the case of a broadcast station stored in the preset memory in advance, the corresponding preset number is displayed on the display as it is, and when an affiliated station is being received, the preset number is different from the display on the display. Radio receiver displaying in an aspect.

(2) A radio receiver for receiving data of a data multiplex broadcasting system and displaying received broadcasting station information based on a program identification code included in the data of the data multiplex broadcasting system. A corresponding program identification code has a memory in which presets are stored.When the preset broadcast station is being received, the preset program identification code is compared with the currently received program identification code, If the two program identification codes are the same, the corresponding preset number is displayed on the display as it is, and the two program identification codes are different. When the affiliated station is being received, the corresponding preset number is different from the display on the display. Radio receiver to display on.

(3) The radio receiver according to (1) or (2), wherein the display in the different mode is a blinking display.

(4) When the currently receiving broadcast station is not an affiliated station, the display of the preset number is turned off and the same program identification code station is searched for (1) or (2).
Radio receiver.

[0012]

Next, an embodiment of a radio receiver according to the present invention will be described with reference to the drawings. FIG.
1 shows a configuration block diagram of an RDS receiver as an example of an embodiment of a radio receiver according to the present invention.

First, the configuration of an RDS receiver as an example of a radio receiver according to the present embodiment will be described with reference to FIG.
The FM reception signal received by the FM antenna 1 is input to the PLL reception circuit 2 and the reception frequency is set based on the control signal from the microcomputer 4, and the IF
It is converted to a signal and detected. The detection output signal from the PLL receiving circuit 2 is input to the muting circuit 3, performs muting processing on the audio signal under the control of the microcomputer 4, and sends the processed signal to the switching circuit 11. The switching circuit 11 also includes the media player 1
2 is also input. The switching circuit 11
Muting circuit 3 and 2 from media player 12
One of the two audio signals is switched and transmitted to the speaker 13. The audio signal from the switching circuit 11 is
Output from

The output of the PLL receiving circuit 2 has its receiving sensitivity detected by a receiving sensitivity detecting circuit 6 as, for example, electric field strength, and is sent to a microcomputer 4. The RDS data demodulation circuit 5 demodulates the detection signal from the PLL receiving circuit 2 and sends out the obtained RDS data to the microcomputer 4.

The microcomputer 4 receives the sensitivity signal from the reception sensitivity detection circuit 6 and the RDS data from the RDS data demodulation circuit 5 and executes the processing for performing the various RDS services described above. The memory (RAM) 7
This is a memory for storing a preset number corresponding to a PI station included in the received RDS data, and is read by the microcomputer 4. The key input circuit 9 includes
Keys for designating various operations of the DS receiver are provided, and operation signals by operating these keys are input to the microcomputer 4.

The display unit 8 has a frequency display 81 for displaying a reception frequency and the like, and an information display 82 for displaying information corresponding to the PI code and broadcast station information.

FIG. 2 shows an operation processing procedure in an RDS receiver as an example of an embodiment of a radio receiver according to the present invention.

On the receiver side, the user operates the key input circuit 9 to operate the RDS
The broadcast station is preset (stored) in the memory 7 as a preset memory, and the corresponding PI code is also stored.

Referring to FIG. 2, first, at step S1, it is determined whether or not the user is listening to a preset broadcasting station (during reception). If not, the process is terminated. If it is middle, in step S2, the preset PI code and the P
Compare with I code.

In step S2, if both PI codes are the same, the corresponding preset number is displayed as it is on the information display 82 (step S3), and the process is terminated. If the two PI codes are different, in step S4,
It is determined whether it is another PI station. Here, another PI station determination is
The following processing can be performed.

For example, a four-digit hexadecimal PI code xxxx
The second (second) numerical value from the top of “x” is “0” for local broadcasting only, “1” for international broadcasting, “2” for national broadcasting,
“3” indicates a wide area broadcast, and “4 to F” indicate a local broadcast. To give a more specific example, "C20
A broadcasting station having a PI code of "1" is a nationwide broadcast, and when that station changes to a PI code of "C401", it means that the station has shifted from nationwide to local broadcasting (shifted to another PI station). In other words, in step S2, it is simply checked whether the PI code is different, and in step S4, a predetermined portion of the PI code is checked to determine whether or not it is another PI station (affiliated family station). ing.

If it is determined in step S4 that the station is another PI station, the corresponding preset number is displayed blinking on the PS display 82 (step S5), and the process is terminated. If it is determined that the station is not another PI station, the corresponding preset number display on the PS display 82 is turned off, the same preset PI (preset PI code) station is searched (step S6), and the process is terminated. . Here, in step S4, being not another PI station means that a completely different broadcasting station is being received.

Although the preferred embodiment of the radio receiver according to the present invention has been described above, this is merely an example, and it goes without saying that various modifications can be made in accordance with the specific application.

[0024]

As described above, according to the radio receiver of the present invention, if the currently receiving broadcasting station is a broadcasting station stored in the preset memory in advance, the corresponding preset number is displayed on the display. On the other hand, at the time of reception of the affiliated family station, the preset number is displayed on the display in a different manner such as blinking display. The change of the receiving station to the broadcasting station can be known, and a special effect that the usability is improved is obtained.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of an RDS receiver in a radio receiver according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation processing procedure of the RDS receiver in the embodiment of the radio receiver according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 antenna 2 PLL receiving circuit 3 muting circuit 6 receiving sensitivity detecting circuit 5 RDS data demodulating circuit 4 microcomputer 7 memory 8 display unit 9 key input circuit 10 timer 11 switching circuit 12 media player 13 speaker 81 frequency display 82 information display

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04H 1/00 H04H 1/00 C

Claims (4)

[Claims] 1. A radio receiver for receiving data of a data multiplex broadcasting system and displaying received broadcasting station information based on a program identification code included in the data of the data multiplex broadcasting system, wherein the currently receiving broadcasting station is In the case of a broadcast station stored in the preset memory in advance, the corresponding preset number is displayed on the display as it is, and when an affiliated station is being received,
The radio receiver displays the preset number in a mode different from the display. 2. A radio receiver for receiving data of a data multiplex broadcast system and displaying received broadcast station information based on a program identification code included in the data of the data multiplex broadcast system. A memory for storing a preset program identification code to be preset, and when the preset broadcast station is being received, the preset program identification code is compared with the currently received program identification code. If the program identification code is the same, the corresponding preset number is displayed on the display as it is, and both program identification codes are different. When the affiliated station is being received, the corresponding preset number is displayed on the display in a different form from the display. A radio receiver for displaying. 3. The radio receiver according to claim 1, wherein the display in the different mode is a blinking display. 4. The radio receiver according to claim 1, wherein, when the broadcast station currently being received is not an affiliated station, the display of the preset number is turned off and the same program identification code station is searched. .