JP2593142Y2 - RDS receiver - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial applications] This invention is based on the RDS (Radio Data System)
stem) For receivers, especially EON (Enhanced Other Ne
The present invention relates to an RDS receiver suitable for preset memory with priority given to RDS data corresponding to twork).

[0002]

2. Description of the Related Art Conventionally, an in-vehicle RDS receiver having an auto memory function receives a radio wave in which RDS data is multiplexed with an FM broadcast signal transmitted from a broadcasting station, and an RDS demodulator provided in the RDS receiver. Thus, the user who is driving the vehicle listens to various information by demodulating the RDS data.

[0003] The RDS data includes an AF list (alternative frequency list) for displaying other broadcast station frequencies broadcasting the same program as the broadcast program currently being listened to, and a TP for identifying a station for broadcasting traffic information. (Traffic program)
A lot of service data such as services are included, and the user while driving the vehicle stores the reception frequency of the RDS station in a preset memory of a plurality of channels provided in the RDS receiver,
This preset memory was read and an arbitrary RDS station was received.

The above-mentioned RDS recorded in the preset memory
The reception frequency of the station was stored by an auto memory function of storing the RDS stations sequentially received using the auto memory seek function of the RDS receiver. The processing procedure of the auto memory operation in the RDS receiver will be described with reference to the flowchart of FIG.

[0005] In the auto memory operation by operating the operation key to start (step S1), the determining whether the electric field intensity V _S of the currently received station is greater than the electric field strength V _a preset (step S2), the currently received When the electric field strength V _{S of the} station is large, a PI code (program identification code) for identifying the program name of the receiving station
To determine whether it is an RDS station and the first RDS receiving station that has not been previously stored in the preset memory (step S3). If the current receiving station is the first receiving station, the RDS receiver Auto memory is performed in the memory of the preset channel (step S5).

[0006] In this manner, the RDS receiving station frequency is automatically stored in all the receiving bands of the receivable receiving band until the circuit goes around the receiving band (step S6). Complete auto memory and end auto memory function.

In addition, it is determined whether or not the above-mentioned auto memory seek has performed the memory for all the preset channels of the RDS receiver while performing the memory of the first round of the reception band (step S8), and the memory is completed in all the preset memories of the RDS receiver. Then, the auto memory function is terminated as described above.

Further, if the auto memory operation function is turned off in a state where the auto memory around the receiving band of the above auto memory seek and the auto memory of all the preset channels are not yet finished, the auto memory operation is naturally performed at this time. Ends (step S9). This auto memory operation
To continue auto memory without turning OFF,
The N value is increased by one step (step S10), and the RDS receiver returns to the beginning of the flowchart and repeats to continue the same auto memory operation as described above.

As described above, by automatically storing the received RDS stations in the preset memory inside the RDS receiver sequentially, the reception of the RDS receiver can be performed only by specifying the preset channel, and the receiving operation is simplified. Meanwhile, a user who is driving a vehicle can easily receive an RDS station such as effective traffic information while listening to broadcast contents while concentrating on driving the vehicle.

[0010]

However, in the above-described conventional RDS receiver, when the auto memory operation is performed, the RDS station that receives the signal without discriminating between the EDS-compatible RDS station and the RDS station that is not the EON-compatible RDS station is used. Since the auto memory was performed according to the order, AF
RDS receiving stations that can update the list, and RDSs that are not
Receiving stations are randomly preset on a preset channel, and after this auto-memory, when a vehicle driving user moves for a long distance, when the preset channel is called, the RDS receiving station with the best receiving condition according to the EONAF data at the destination is called. There is a drawback in that preset channels that can be received by the user and preset channels that cannot be received are randomly stored, so that a user who is driving the vehicle is likely to cause an erroneous operation during the reception operation.

The present invention has been made in view of the above points, and aims at solving the drawbacks of the conventional example. When the RDS station is in auto memory, an RDS station compatible with EON and an RDS not compatible with EON are used. R that can be placed on a preset channel and auto-memory can be distinguished from stations
To provide a DS receiver.

[0012]

FIG. 1 is a functional block diagram showing an operational configuration of the present invention.
The receiver receives the RDS data, and receives the ADS of the RDS data.
A stored in preset memory by F list
Rewrite F-list and have auto memory function.
EON that can recognize P (traffic program), TA (traffic notification), and group type 14A data
(Other network information) An auto memory means for recognizing the TP, TA, and group type 14A data in the corresponding RDS receiver and giving priority to an EON compatible RDS station for preset memory; Auto-memory means for the first cycle of the reception band for preset memory of the RDS stations of the above, and auto-memory means for the second cycle of the reception band for preset memory of the RDS stations other than the EON-compatible RDS stations already stored in the preset memory of the first cycle Are provided.

[0013]

The operation of the present invention will be described with reference to the functional block diagram of FIG. According to this invention, when the auto memory operation is started (auto memory start means 1), the RDS station is received and the TP = 0, TA = 1 and the group type 14A data of the RDS data are identified, and the RDS station corresponding to the EON is identified. Priority and auto memory to preset channel (EON
Corresponding RDS station memory means 2).

The above-mentioned auto memory of the EDS-compatible RDS station automatically seeks the RDS station, goes around the receivable reception band, and sequentially stores all the EON-supported RDS stations in a preset channel (memory that goes around the reception band). Means 3). Or RDS compatible with EON until the memory for all preset channels provided in the RDS receiver is completed.
Stations can be stored (preset channel detection means).

As described above, the automatic memory is executed as an RDS station corresponding to all EONs in the reception band or as a memory for all preset channels.

Further, an EON-compatible RDS which is not stored by the execution of the automatic memory in the first round of the reception band.
The RDS stations other than the stations are stored (the memory means 5 of the RDS station), and the memory is sequentially stored in the preset channel by the automatic memory operation of the second round of the reception band (the memory means 6 of the second round of the reception band) as described above. Or RD until memory is completed in all preset channels provided in RDS receiver
The S station can be stored.

As described above, the auto memory of the RDS station is EO
Since the preset RDS stations corresponding to N are stored in the preset channels sequentially and the preset memory is provided. After the RDS stations corresponding to the EON are stored, the RDS stations other than the RDS stations corresponding to the EON are sequentially stored in the preset channels. , RDS stations that support EON, and RDs that do not support EON
Since the preset channel with the S station is distinguished, the user who is driving the vehicle can use the RD compatible with the EON without erroneous operation.
The S station can be accurately received.

[0018]

FIG. 1 shows an embodiment of an RDS receiver according to the present invention.
A description will be given based on FIG. FIG. 1 is a functional block diagram showing an operational configuration, FIG. 2 is a hardware block diagram, and FIG. 3 is a flowchart showing an automatic memory operation procedure.

In FIG. 2, reference numeral 11 denotes a front end (F /
E) circuit, and the F / E circuit 11 selectively amplifies a reception signal of a reception antenna, and a mixer (MIX) provided therein.
The IF / DET circuit 12 converts the signal to an IF frequency.
F is amplified and detected.

Reference numeral 13 denotes a noise canceller (NC) circuit. The detected signal is supplied to a stereo demodulation (MPX) circuit 14 via an NC circuit 13 and a volume control (VOL) circuit is provided.
The volume is adjusted at 15 and amplified by an output amplifier (AMP) 17 via a mute (MUTE) circuit 16 and output to a speaker.

Reference numeral 18 denotes an RDS demodulation (DEMO) circuit.
The detection output signal of the IF / DET circuit 12 is supplied to the RDS demodulation circuit 18, and the RDS data is demodulated.
The S data is supplied to a system microcomputer 20 via a synchronous microcomputer (μ-CON) 19, and the system microcomputer 20 controls the MUTE circuit 16 and the like.

As is well known, the system microcomputer 20 basically comprises a CPU, a ROM, a RAM, an input port and an output port (not shown), and a program for controlling the CPU is written in the ROM. The CPU performs arithmetic processing while taking in required external data from the input port or transmitting and receiving data to and from the RAM according to this program, and outputs processed data from the output port as necessary.

Reference numeral 21 denotes a low-pass filter (LPF).
22 is a PLL controlled by the system microcomputer 20
The PLL circuit 12 includes the LPF 21 and the F
A synthesizer tuner is constituted by the voltage control oscillator (VCO) of the / E circuit 11, and an arbitrary broadcast station can be received under the control of the system microcomputer 20.

The RDS receiver configured as described above receives a general radio broadcast station and simultaneously receives the RD of the RDS station having various service data such as program identification (PI) data.
S data can be received. In particular, EO including TP data for identifying a broadcasting station that broadcasts traffic information in RDS data and TA data for notifying traffic information is included.
N-compatible RDS data is often used as an effective information source for users who are driving a vehicle.

EDS-compatible RDS stations for national broadcasting are listed above.
In many cases, the determination is made based on the condition that TP = 0 and TA = 1 and the group type 14A data exists.
This is an RDS station that can be received nationwide by updating the list.

In addition, an EON-compatible RDS station may be easily determined using only the presence or absence of the group type 14A data, but may include a local station (a station that can receive only in a small area). Since reception may not be possible continuously depending on the travel distance due to driving of the vehicle, in order to reliably select an EDS-compatible RDS station, as described above, the presence or absence of TP = 0, TA = 1 and group type 14A data It is necessary to make a determination based on the following conditions.

As described above, the EDS-compatible RDS stations are determined, preset memory is stored in order, and the EON-compatible RDS stations are stored.
By distinguishing it from the preset channels of RDS stations other than the station, the reception operation of the EDS-compatible RDS station is simplified, and erroneous operation can be prevented.

The auto-memory operation for presetting the EDS-compatible RDS station with priority will be described with reference to the flowchart of FIG.

The field strength of the by operating the operation keys of the RDS receiver to start auto memory (step S1), RDS receiver detects the electric field strength V _S of the receiver station currently being received, the currently received station V _S is compared with _a preset set electric field strength Va, and if the condition V _s > V _a is satisfied (step S2), the PI code of the RDS data being received is checked to determine whether the station is an RDS station. At the same time, it is checked whether or not the RDS data is an RDS station already stored in a preset channel in the RDS receiver (step S3).

If it is the first RDS station, it is further determined whether the received RDS data is the RDS station with TP = 0 and TA = 1 and the group type 14A data is transmitted (step S4), ie, , EON-compatible RDS station is determined. In this way, if the RDS station satisfies all the above conditions, it is stored in the preset channel memory (step S5).

The above-mentioned preset memory of the EDS-compatible RDS station performs an auto-memory seek for all the reception frequencies of the reception band that can be received by the RDS receiver, and sets the EON-compatible RDS station that can be received around the reception band. The memory is stored (step S6). As described above, the memory for one round of the receivable reception band is executed to determine the completion of the memory of all the preset channels of the RDS receiver (step S7). When the automatic memory is performed for all the preset channels, the auto memory function is completed. (END).

If the memory of all the preset channels is completely completed (step S8) while the memory of the first round of the reception band is not completed (step S6), the memory capacity of the preset channels of the RDS receiver is lost any more. The auto memory function ends (END),
Even if the memories of all the preset channels are not yet completed, if the above-mentioned auto memory function is set to OFF (step S9), the auto memory function is naturally ended (END).

When the auto memory function is to be continued without turning off the auto memory function (step S9), the N value is increased by one step (step S10), and an EON-compatible RDS station which is not stored in the receivable reception band still exists. Because
This automatic memory operation returns to the first step S2 and repeats the same flow chart as described above to preset memory the EON-compatible RDS station.

On the other hand, the automatic memory for the first round of the reception band is completed, all the EDS-compatible RDS stations in this reception band are all stored (step S6).
If the memory of all the preset channels of the DS receiver is not completed and still remains (step S9), as described above,
The N value one step up (step S11), and again detects the electric field strength V _S of the currently received station, under the condition of V _s> V _a (step S12), RDS station checks the PI code Is determined, the RDS data is already R
R stored in the preset channel in the DS receiver
It is checked whether the station is a DS station (step S13).

If this is the first RDS station, this RDS
The stations are sequentially stored in the next preset channel memory (step S14), and seek is performed for the receivable reception band in the same manner as described above, and the second cycle auto memory is executed (step S15).

As described above, E is stored in the memory in the first round of the reception band.
The ON-compatible RDS stations are sequentially stored in the preset channel, and the EON-compatible RDS is stored in the memory of the second round of the reception band.
Since the RDS stations other than the station can be automatically stored in the preset channel in order, the memory for the preset channel is an EON-compatible RDS station and an EON-compatible RDS station.
It can be stored separately from RDS stations other than DS stations.

As described above, since the EON-compatible RDS stations can be collectively and automatically stored in the preset channel in order, the reception operation of the EON-compatible RDS station can be called up very easily and the reception setting can be performed. The user can receive an EON-compatible RDS station without any operation error.

[0038]

As described above, the RDS receiver according to the present invention includes an EON-compatible RDS station and an EON-compatible RDS station.
RDS stations other than the station can be stored in the preset channel in order, so that the reception of the RDS station corresponding to the EON by the preset channel operation can be easily operated without erroneous operation and the reception setting can be performed. The middle user can receive a desired EON-compatible RDS station while ensuring driving safety.

In addition, the structure is simple and the auto memory function of the EDS-compatible RDS station largely depends on the software of the built-in system microcomputer, so that the function can be improved without increasing the cost. It has excellent features such as easy implementation.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an operational configuration of an RDS receiver according to the present invention.

FIG. 2 is a block diagram showing a hardware configuration of an embodiment of the RDS receiver according to the present invention.

FIG. 3 is a flowchart showing a procedure of an auto memory operation of the present invention.

FIG. 4 is a flowchart showing a procedure of an automatic memory operation according to a conventional example.

[Explanation of symbols]

 11 Front-end (F / E) circuit 12 IF amplification and detection (IF / DET) circuit 13 Noise canceller (NC) circuit 14 Stereo demodulation (MPX) circuit 15 Volume control (VOL) 16 Mute (MUTE) circuit 17 Output amplifier ( AMP) 18 RDS demodulation (DEMO) circuit 19 RDS data synchronization microcomputer (μ-CON) 20 System microcomputer 21 Low-pass filter (LPF) 22 PLL circuit

Claims (1)

(57) [Scope of request for utility model registration] 1. An RDS data is received, an AF list stored in a preset memory is rewritten by an AF list of the RDS data, and further, an auto memory function is provided, and a TP (traffic program) and a TA (traffic notification) are provided. E that can recognize group type 14A data
An RDS receiver compatible with ON (other network information), an auto memory means for recognizing the TP, TA and group type 14A data and giving priority to an EON compatible RDS station for preset memory;
An automatic memory means for the first cycle of the reception band for preset memory of the ON-compatible RDS station, and an automatic memory means for the second cycle of the reception band for preset memory of RDS stations other than the EON-compatible RDS station already stored in the preset memory of the first cycle. An RDS receiver comprising a memory means.