JP3782636B2 - Radio receiver - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a radio receiver, and more particularly to a radio receiver effective for use in a radio data multiplex broadcasting system.
[0002]
[Prior art]
As a radio data multiplex broadcasting system, for example, in Europe, an RDS (Radio Data System) that digitally multiplexes channel selection data and program identification data to FM radio broadcast signals and provides various services to vehicle drivers. Has been put to practical use. Typical RDS services include a country (ID) service area, a PI (program identification) service that identifies the program name of the broadcasting station, and a PS (receiving station name display) service that displays the name of the received broadcasting station on the tuner display. There are AF (similar program broadcast frequency list) services for displaying the frequencies of other broadcast stations broadcasting programs of the same content, TP services for identifying broadcast stations for traffic information, and the like.
[0003]
The AF service has a search function that can receive other broadcast station radio waves of the same program broadcast when the received electric field strength of the RDS radio waves transmitted from the broadcast station by the in-vehicle tuner drops below a certain level. This search is performed based on an AF list stored in advance in an AF (alternate frequency) list transmitted from a broadcasting station in advance. For example, when the radio wave intensity from a certain broadcasting station becomes weak while traveling in a car, other stations transmitting the same broadcast content are automatically received based on the AF list received in the reception area. At that time, the AF list stored in the in-vehicle memory is updated to the AF list received in the area.
[0004]
Also, 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 a preset number indicating the broadcasting station are detected. 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]
[Problems to be solved by the invention]
By the way, the PI service of the conventional RDS radio receiver displays a preset number assigned to each of the receiving broadcast stations in a predetermined area on the display unit. Since another PI station "(affiliated family station) exists, the following problem occurs. For example, a broadcast “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 period. In such a case, in the conventional radio receiver, the preset number corresponding to the currently receiving broadcast station stored in the preset memory is displayed on the display unit, but when another PI station is received, the preset number is assigned to the other PI station. Since the preset number does not exist, there is nothing to display on the display, and the preset number corresponding to the broadcast station that has been received so far is displayed blank. Therefore, there arises a problem that the user cannot know the broadcasting station set by the user, that is, the preset number.
[0006]
Accordingly, 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 affiliated station.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the radio receiver according to the present invention employs the following characteristic configuration.
[0009]
( 1 ) In a radio receiver that receives data of a data multiplex broadcast system and displays received broadcast station information based on a program identification code included in the data of the data multiplex broadcast system.
Storage means for presetting data multiplex broadcasting stations and corresponding program identification codes, and when receiving the preset broadcasting stations, the preset program identification code and the currently received program identification code comparing means for comparing the bets, the comparison result of the comparison means, the long both the program identification code is the same, and displays the corresponding preset number directly, the only predetermined portions different affiliate of both the program identification code sometimes it is received, a radio receiver and a display means for displaying in a different manner from that of the display the preset number.
[0010]
( 2 ) The radio receiver according to (1) , wherein the display of the display unit in a different mode is a flashing display of the preset number .
[0011]
(3) the both the program identification code at all different, if the broadcasting station currently being received is not a series station, the performing the same program identification code station search by turning off the display of the preset number (1) or ( 2) Radio receiver.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a radio receiver according to the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an RDS receiver as an example of an embodiment of a radio receiver according to the present invention.
[0013]
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. 1. An FM reception signal received by an FM antenna 1 is input to a PLL receiving circuit 2 from a microcomputer 4. The reception frequency is set based on the control signal, converted into an IF signal, and detected. The detection output signal from the PLL receiving circuit 2 is input to the muting circuit 3, the muting process is performed on the audio signal under the control of the microcomputer 4, and the processed signal is sent to the switching circuit 11. An audio signal from the media player 12 is also input to the switching circuit 11. The switching circuit 11 switches one of the two audio signals from the muting circuit 3 and the media player 12 and sends it to the speaker 13. The audio signal from the switching circuit 11 is output from the speaker 13.
[0014]
The output of the PLL reception circuit 2 is detected by the reception sensitivity detection circuit 6 as the reception sensitivity, for example, as electric field strength, and is sent to the microcomputer 4. The RDS data demodulating circuit 5 demodulates the detection signal from the PLL receiving circuit 2 and sends the obtained RDS data to the microcomputer 4.
[0015]
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 processes for performing the various RDS services described above. The memory (RAM) 7 is a memory for storing a preset number corresponding to the PI station included in the received RDS data, and is read by the microcomputer 4. The key input circuit 9 is provided with keys for designating various operations of the RDS receiver, and operation signals generated by operating these keys are input to the microcomputer 4.
[0016]
The display unit 8 includes a frequency display 81 that displays a reception frequency and the like, and an information display 82 that displays information corresponding to the PI code, broadcast station information, and the like.
[0017]
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.
[0018]
On the receiver side, the RDS broadcasting station is preset (stored) in the memory 7 as a preset memory via the microcomputer 4 by the user operating the key input circuit 9, and the corresponding PI code is also stored.
[0019]
Referring to FIG. 2, first, in step S1, it is determined whether or not the user is listening to a preset broadcast station (receiving), and if not receiving, the process is terminated. For example, in step S2, the preset PI code is compared with the currently received PI code.
[0020]
If both PI codes are the same in step S2, the corresponding preset number is displayed as it is on the information display 82 (step S3), and the process is terminated. If both PI codes are different, it is determined in step S4 whether or not they are different PI stations. The separate PI station determination here can be performed by the following processing.
[0021]
For example, the second (second) numerical value from the top of the 4-digit hexadecimal PI code xxx is “0” for local broadcasting only, “1” for international broadcasting, and “2” for national broadcasting. , “3” indicates wide area broadcasting, and “4 to F” indicate local broadcasting. To give a more specific example, a broadcasting station having a PI code of “C201” is a national broadcasting, and when the station changes to a PI code of “C401”, it has shifted from national to local broadcasting (another PI). It has moved to the station). In other words, in step S2, a check is made only to determine whether the PI code is different. In step S4, a predetermined part of the PI code is checked to determine whether it is another PI station (affiliated family station). ing.
[0022]
If it is determined in step S4 that the station is a different PI station, the corresponding preset number is displayed blinking on the PS display 82 (step S5), and the process ends. 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.
[0023]
The preferred embodiment of the radio receiver according to the present invention has been described above. However, this is merely an example, and it is needless to say that various modifications can be made according to a specific application.
[0024]
【The invention's effect】
As described above, according to the radio receiver of the present invention, when the currently receiving broadcast station is a broadcast station stored in the preset memory in advance, the corresponding preset number is displayed as it is on the display. When receiving an affiliate family station, the preset number is displayed on the display in a different manner such as blinking, so that the reception from the reception broadcast station set by the user to the broadcast station as the affiliate station is received. It becomes possible to know the change of the station, and it is possible to obtain a special effect that the convenience is improved.
[Brief description of the drawings]
FIG. 1 is a configuration block diagram of an RDS receiver in an embodiment of a radio receiver according to 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]
DESCRIPTION OF SYMBOLS 1 Antenna 2 PLL receiving circuit 3 Muting circuit 6 Reception sensitivity detection circuit 5 RDS data demodulation circuit 4 Microcomputer 7 Memory 8 Display part 9 Key input circuit 10 Timer 11 Switching circuit 12 Media player 13 Speaker 81 Frequency display 82 Information display

Claims (3)

In a radio receiver that receives data of a data multiplex broadcast system and displays received broadcast station information based on a program identification code included in the data of the data multiplex broadcast system,
Storage means for presetting data multiplex broadcasting stations and corresponding program identification codes, and when receiving the preset broadcasting stations, the preset program identification code and the currently received program identification code comparing means for comparing the bets, the comparison result of the comparison means, the long both the program identification code is the same, and displays the corresponding preset number directly, the only predetermined portions different affiliate of both the program identification code sometimes being received, the radio receiver comprising: a display means for displaying in a different manner from that of the display the preset number. The radio receiver according to claim 1 , wherein the display in a different mode of the display means is a blinking display of the preset number . Wherein both the program identification code at all different, if the broadcasting station currently being received is not a series station, according to claim 1, characterized in that performing the same program identification code station search by turning off the display of the preset number or The radio receiver according to 2.

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