JP3608589B2 - Multiple broadcast receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multiplex broadcast receiving apparatus that receives multiplex broadcast such as radio data system (hereinafter simply referred to as RDS) broadcast.
[0002]
[Prior art]
Conventionally, such RDS broadcasting has been widely spread mainly in Europe and the like, and multiplex data is multiplexed on FM radio broadcast airwaves. In this multiplex data, for example, a program for identifying a broadcast program is included. There is identification data (hereinafter simply referred to as a PI code), and this program identification code can be detected on the receiving side.
[0003]
In Europe and the like where such RDS broadcasting is performed, since the same broadcast program is broadcasted by the broadcasting station in each country or each region, the program is detected by detecting the program identification data on the receiving side. The contents can be identified, and this program identification data is a very convenient service.
[0004]
In such an RDS receiver that receives an RDS broadcast, for example, when receiving a desired broadcast program different from the currently received broadcast program, a seek operation for automatically and sequentially switching the reception frequency is performed. Usually it has a function.
[0005]
As such seek operation, when the reception level of the broadcast radio wave received during the seek operation is good, for example, when the signal meter voltage or the like in the broadcast radio wave being received is equal to or higher than a predetermined level value, Station detection is performed.
[0006]
However, in Europe and the like, there are many cases where the same program is broadcast even within the same region. Therefore, when the seek operation is performed in the RDS receiver, the broadcast immediately before the seek operation, that is, the currently received broadcast is performed. Even if it is the same broadcast program as the program, the seek operation is stopped at the reception frequency and the same broadcast program is received, so it is difficult to receive the desired broadcast program and the seek operation is performed sequentially. A key input operation that prompts the user has to be performed, resulting in a situation where the operability is not very good.
[0007]
Therefore, in order to cope with such a situation, the applicant has devised an RDS receiver as shown in Japanese Patent Application Laid-Open No. 64-67037.
[0008]
When such an RDS receiving apparatus performs a key input operation for prompting a seek operation, the PI code corresponding to the broadcast program immediately before the seek operation is stored, and the broadcast program is detected in a station during the seek operation. When seeking, the currently stored PI code is compared with the seeked PI code, and if these PI codes are the same, the seek operation is continued without stopping the seek operation currently being performed, in other words, storage is performed. The seek operation is continued until a PI code different from the internal PI code is detected.
[0009]
Therefore, according to such an RDS receiver, even if the same broadcast program as the broadcast program immediately before the seek operation is sought during the seek operation, the seek operation that is currently in operation is continued without being stopped, and the seek operation is continued. When seeking a broadcast program that is different from the previous broadcast program, the seek operation that is currently in operation is stopped. By reducing the number of key input operations that prompt the seek operation, the operability can be improved. it can.
[0010]
[Problems to be solved by the invention]
According to the RDS receiver, which is the conventional multiplex broadcast receiver described above, for example, as shown in FIG. 6, the order of seek operation is set to receive frequencies F1, F2, F3, F4, F5, F6 from the lowest frequency. The first seek operation when the frequency F1, F2, and F4 are broadcast programs PI1, the reception frequencies F3 and F5 are broadcast programs PI2, and F6 is the broadcast program PI3, and the user's desired broadcast program is PI3. At this time, the reception frequency F1 currently being received, that is, the PI code of the broadcast program PI1 immediately before the seek operation is stored, and then the broadcast program PI1 of the reception frequency F2 is detected by the seek operation. Since it is the same as the broadcast program of the frequency F1, the seek operation is continued, and when the broadcast program PI2 of the reception frequency F3 is detected next, the currently stored PI code (reception) So different from the frequency broadcasting program PI1 of F1), to stop at the receiving frequency F3 the seek operation of the currently running.
[0011]
Next, when the second seek operation is performed, the PI code of the broadcast program PI2 having the reception frequency F3 immediately before this seek operation is stored and updated, and the broadcast program PI1 having the reception frequency F4 is detected by this seek operation, this broadcast program is detected. Since PI1 is different from the currently stored PI code (broadcast program PI2 of reception frequency F3), the seek operation currently being performed is stopped at reception frequency F4.
[0012]
In this way, the third to fourth seek operations are performed, and by the fourth seek operation, the PI code of the broadcast program PI2 of the reception frequency F5 immediately before this seek operation is stored and updated. When the broadcast program PI3 having the reception frequency F6 is detected, since the broadcast program PI3 is different from the currently stored PI code (broadcast program PI2 having the reception frequency F5), the seek operation currently being performed is stopped at the reception frequency F6.
[0013]
When the broadcast program PI3 is received with the broadcast setting as shown in FIG. 6 by the above series of operations, the desired broadcast program PI3 can be received by the fourth seek operation.
[0014]
However, according to such an RDS receiving apparatus, even if the same broadcast program as the broadcast program immediately before the seek operation is sought, the seek operation that is currently being performed is continued without being stopped. Since only the same broadcast program as the previous broadcast program is targeted, when seeking the desired broadcast program PI3 with the broadcast setting as shown in FIG. 6, it is easy to receive the desired broadcast program. In addition, there is a problem that the input operation for prompting the seek operation is necessary many times and the operability is not very good.
[0015]
The present invention has been made in view of the above problems, and the purpose thereof is to be able to quickly receive a desired broadcast program even in a broadcast area where many of the same program are set, In addition, an object of the present invention is to provide a multiplex broadcast receiving apparatus with improved operability.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, a first invention in a multiplex broadcast receiving apparatus of the present invention comprises a receiving means for receiving a broadcast radio wave arriving from a broadcast station and including a broadcast program and data multiplexed on the broadcast program. An identification data detection means for detecting program identification data from the broadcast radio waves received by the reception means, and a seek for sequentially receiving the broadcast radio waves of each broadcasting station by sequentially changing the reception frequency for the reception means. In response to a predetermined operation, a seek means for performing the operation, a stationed detection means for detecting that the broadcast radio wave of the broadcast station has been received during the seek operation, a storage means capable of storing a plurality of the program identification data, The seek means executes a seek operation, the program identification data immediately before the seek operation is stored in the storage means, and the broadcast station program identification data detected by the station-detected means during the seek operation. Is a multiplex broadcast receiving device having a control means for continuing the seek operation if it matches any program identification data stored in the storage means, and has a timer for measuring a predetermined time, If the program identification data of the broadcasting station detected during the seek operation and all the program identification data stored in the storage means do not match, the control means starts the timer and starts the predetermined time before the predetermined time has elapsed. When an operation is detected, the program identification data of the broadcasting station detected during the seek operation is stored in the storage means, and the seek operation is executed again by the seek means.
[0017]
This multi-broadcast receiving apparatus corresponds to an RDS receiving apparatus that receives a multi-broadcast such as an RDS broadcast.
[0018]
The receiving means corresponds to a receiving antenna or a front end unit, the identification data detecting means corresponds to an RDS demodulating circuit for decoding multiplexed data in RDS broadcasting, and the stationed detecting means includes, for example, The IF detection circuit detects whether the reception level is equal to or higher than a predetermined value using a signal meter voltage, an IF counter signal, etc., and the control means corresponds to a CPU that controls the entire apparatus. The seek means corresponds to a PLL circuit that switches the reception frequency of the front end unit in response to a command from the CPU, and the storage means corresponds to, for example, a RAM.
[0019]
The program identification data detected by the identification data detecting means corresponds to a PI code for identifying a broadcast program.
[0020]
The program identification data immediately before the seek operation corresponds to a PI code related to the broadcast program being received at the time of the predetermined operation, that is, a key input operation for prompting the seek operation.
[0021]
Therefore, according to the multiplex broadcast receiver in the first invention, if the program identification data of the broadcast station detected during the seek operation and all the program identification data stored in the storage means do not match, When the predetermined operation is detected before the predetermined time has elapsed after the timer is started, the program identification data of the broadcasting station detected during the seek operation is stored in the storage means, and the seek operation is executed again by the seek means. The program identification data stored in the storage means is stored by additionally storing not only the broadcast program immediately before the seek operation but also the program identification data of the mismatched broadcast program detected during the seek operation in the storage means. Since the seek operation is continued without stopping even if the same broadcast program is received, the desired broadcast program is sought with the broadcast setting as shown in FIG. Even if UNA can receive quickly the desired broadcast program, moreover, the input operation number to prompt the seek operation can also be minimized, it is possible to improve the operability.
[0022]
In addition to the configuration of the first invention, in the multiplex broadcast receiving apparatus according to the second invention, the control means is stored in the program identification data of the broadcast station detected during the seek operation and the storage means. If all the program identification data do not match, when the predetermined time elapses after starting the timer, the seek operation is stopped and the program identification data stored in the storage means is erased. And
[0023]
Therefore, according to the multiplex broadcast receiving apparatus in the second invention, in addition to the effects of the first invention, the program identification data of the broadcast station detected during the seek operation and all the programs stored in the storage means If the identification data does not match, when the predetermined time has elapsed after starting the timer, the seek operation during operation is stopped and the program identification data stored in the storage means is erased. The program identification data stored in the storage means can be automatically deleted without any operation, and the operability can be improved.
[0024]
According to a third aspect of the present invention, there is provided a receiving apparatus for multiplex broadcasting, receiving means for receiving a broadcast radio wave arriving from a broadcasting station and including a broadcast radio wave including data multiplexed on the broadcast program, and received by the receiving means. Identification data detection means for detecting program identification data from the broadcast radio waves, seek means for executing a seek operation for sequentially receiving the broadcast radio waves of each broadcasting station by sequentially changing the reception frequency for the reception means; Stationary detection means for detecting the reception of broadcast radio waves from the broadcasting station during the seek operation, storage means for storing a plurality of program identification data, and seek operation to the seek means in response to a predetermined operation The program identification data immediately before the seek operation is stored in the storage means, and the program identification data of the broadcasting station detected by the stationed detection means during the seek operation is stored in the storage means. If it matches any of the program identification data, it is a multiplex broadcast receiving device having a control means for continuing the seek operation, and has a setting timer for measuring a set time, and the control means has the predetermined operation In response to this, the setting timer is started, the seek unit is caused to execute a seek operation, and the program identification data stored in the storage unit is erased when the set time elapses.
[0025]
Note that the predetermined time described in the first and second inventions is subject to monitoring whether or not the current seek operation is to be continued, but the set time in the third invention is during the seek operation. Whether to erase the program identification data stored in the storage means is the object of monitoring. The set time is preferably about 120 seconds, for example.
[0026]
Therefore, according to the multiplex broadcast receiving apparatus of the third invention, the setting timer is started in accordance with a predetermined operation, and when the setting time of the setting timer elapses, it is stored in the storage means even during the seek operation. Since the program identification data is automatically deleted, for example, by storing all the program identification data related to the currently broadcasting broadcast station in the storage means, the broadcast station can be received by the seek operation. It is possible to deal with situations where it is impossible.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an RDS receiver according to an embodiment of the multiplex broadcast receiver of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration inside the RDS receiver according to the present embodiment.
[0028]
In FIG. 1, an RDS receiver outputs an intermediate frequency signal that is tuned to a broadcast radio wave of a broadcast station based on a reception antenna 1 that receives a broadcast radio wave coming from a broadcast station and a voltage output from a PLL circuit 2 described later. A front end unit 3, an IF detection circuit 4 that amplifies the intermediate frequency signal and outputs a signal meter voltage and an IF counter signal, FM-demodulates the intermediate frequency signal and outputs the signal as an audio signal, and the audio An NC / MPX circuit 5 that cancels the pulse noise included in the signal, demodulates the signal in stereo, and outputs the stereo signal, and a Vol that turns on / off the mute applied to the stereo signal by changing the signal level of the stereo signal. / Mute circuit 6 and a stereo signal via this Vol / Mute circuit 6 An amplifier circuit 7 for amplification, a speaker 8 for outputting the stereo signal amplified by the amplifier circuit 7 as audio, an RDS demodulator circuit 9 for demodulating and outputting RDS data from the audio signal of the IF detection circuit 4, It has an operation key 10 for inputting a command related to the RDS receiver, for example, a seek operation command, and a CPU 11 for controlling the entire RDS receiver.
[0029]
The RDS demodulating circuit 9 has a 57 kHz BPF circuit, and the BPF circuit demodulates the RDS data by passing a 57 kHz subcarrier from the audio signal.
[0030]
The CPU 11 incorporates a RAM 11a for storing the RDS data, frequency, and the like, and outputs a DC voltage to the front end unit 3 via the PLL circuit 2 so as to tune a predetermined broadcasting station.
[0031]
Further, the CPU 11 stores reception level values such as a signal meter voltage and an IF counter signal from the IF detection circuit 4, and performs a comparison operation for determining whether or not these reception level values are equal to or higher than a predetermined level value. Are also doing.
[0032]
The CPU 11 controls ON / OFF in the Vol / Mute circuit 6.
[0033]
Next, the operation of such an RDS receiver will be described. FIG. 2 is a flowchart showing the processing operation of the CPU 11 in the seek operation processing of the RDS receiver of the present invention.
[0034]
This seek operation process is not only the PI code of the broadcast program immediately before the seek operation, but also the PI code of the mismatched broadcast program detected during the seek operation, and is stored in the RAM 11a. Even if the same broadcast program as the PI code is received, the seek operation is continued without stopping, and the PI code of the broadcasting station detected during the seek operation does not match all the PI codes stored in the RAM 11a. Then, when a predetermined time elapses after the timer is started, the seek operation is stopped and the PI code stored in the RAM 11a is erased.
[0035]
In FIG. 2, when the CPU 11 inputs a seek key for prompting a seek operation by the operation key 10 (step S1), the PI code related to the currently received broadcast program is stored in the RAM 11a (step S2), and the Vol / Mute circuit 6 The mute is turned on (step S3), the currently received reception frequency is sought up by one step (step S4), and the signal meter voltage of the broadcast station received by this seek up is equal to or higher than a predetermined level value. It is determined whether the SD signal of the currently receiving broadcast station is OK or NG (step S5). In step S4, seek up is performed to increase the reception frequency step by step, but this is determined by a seek key input operation, and seek down is performed to decrease the reception frequency step by step. You may do it.
[0036]
If the SD signal of the currently receiving broadcast station is OK in step S5, whether or not the counter value of the IF counter signal of the currently receiving broadcast station is greater than or equal to a predetermined level value, that is, the IF counter signal is OK or It is determined whether it is NG (step S6). If the IF counter signal is OK, it is determined whether or not the currently receiving broadcast station is an RDS station (step S7). If the currently receiving broadcast station is not an RDS station, the mute of the Vol / Mute circuit 6 in the mute ON state is turned off (step S8), and the timer in the CPU 11 is started (step S9). It is determined whether or not (step S10). If this timer has not expired, it is determined whether or not the seek key has been input (step S11). If the seek key is input during the measurement time of this timer, the PI code being received is additionally stored in the RAM 11a (step S12), and the process proceeds to step S3. In step S12, the PI code at the currently receiving broadcast station is additionally stored in the RAM 11a. However, the present invention is not limited to the RDS station, that is, the broadcast station transmitting the PI code. Needless to say.
[0037]
If the broadcasting station currently being received in step S7 is an RDS station, it is determined whether or not the PI code of this broadcasting station matches the PI code stored in the RAM 11a (step S13). If the currently receiving broadcast station does not match the PI code stored in the RAM 11a, the process proceeds to step S8.
[0038]
If the SD signal is NG in step S5, the IF counter signal is NG in step S6, or the broadcasting station currently being received in step S14 matches the PI code stored in the RAM 11a, step S4 is performed. Migrate to
[0039]
If no seek key is input during the timer measurement time in step S11, the process proceeds to step S10.
[0040]
If the time is up in step S10, the PI code currently stored in the RAM 11a is deleted (step S14), and the seek operation process is terminated.
[0041]
Now, the seek operation process will be specifically described with reference to FIG. FIG. 5 is an explanatory diagram simply showing the number of seek operations related to the seek operation processing of the present invention. Note that the broadcast settings in FIG. 5 are the same as the broadcast settings in FIG. 6, and the desired broadcast station is the same in the broadcast program PI3.
[0042]
At the time of the first seek operation, first, the reception frequency F1 currently being received, that is, the PI code of the broadcast program PI1 immediately before the seek operation is stored in the RAM 11a, and then the broadcast program PI1 having the reception frequency F2 by the seek operation. However, since it is the same as the broadcast program with the reception frequency F1 stored in the RAM 11a, the seek operation is continued, and then when the broadcast program PI2 with the reception frequency F3 is detected, the PI code currently stored is detected. Since it is different from (broadcast program PI1 with reception frequency F1), the seek operation currently being performed is stopped at reception frequency F3.
[0043]
Next, the second seek operation is performed, and the PI code of the broadcast program PI2 having the reception frequency F3 immediately before the seek operation is additionally stored in the RAM 11a. At this time, the PI codes of the broadcast programs PI1 and PI2 previously stored are stored in the RAM 11a.
[0044]
When the broadcast program PI1 with the reception frequency F4 is detected by this seek operation, the broadcast program PI1 stored in the RAM 11a is the same as the currently received broadcast program, so the seek operation being currently performed is continued.
[0045]
When the broadcast program PI2 having the reception frequency F5 is detected by this seek operation, the broadcast program PI2 stored in the RAM 11a and the currently received broadcast program are the same, so the seek operation being currently performed is continued.
[0046]
When the broadcast program PI3 having the reception frequency F6 is detected by this seek operation, the broadcast program currently stored in the RAM 11a is different from the broadcast program PI3, and the seek operation currently being performed is stopped at the reception frequency F6.
[0047]
By performing such a series of operations, even if the broadcast setting is as shown in FIG. 5, it was only necessary to perform the seek operation twice in the past.
[0048]
Therefore, according to the seek operation process shown in FIG. 2, if the PI code of the broadcast station detected during the seek operation and all the PI codes stored in the RAM 11a do not match, the timer is started for a predetermined time. If the predetermined operation is detected before the lapse of time, the PI code of the broadcasting station detected during the seek operation is stored in the RAM 11a, the timer is cleared, and the seek operation is executed again. By storing not only the broadcast program just before the operation but also the PI code of the mismatched broadcast program detected during the seek operation in the RAM 11a, even if the same broadcast program as the PI code stored in the RAM 11a is received, Since the seek operation is continued without stopping, it is possible to seek a desired broadcast program with the broadcast setting as shown in FIG. Also can receive quickly the desired broadcast program I, moreover, the input operation number to prompt the seek operation can also be minimized, it is possible to improve the operability.
[0049]
Also, if the PI code of the broadcasting station detected during the seek operation and all the PI codes stored in the RAM 11a do not match, the seek operation is stopped when a predetermined time elapses after the timer is started. Since the PI code stored in the RAM 11a is erased, the PI code stored in the RAM 11a can be automatically erased without any operation, and the operability is improved. can do.
[0050]
However, according to the seek operation process shown in FIG. 2, when the PI codes of all broadcasting stations currently being broadcast are stored in the RAM 11a during the seek operation, the PI codes are detected by the ongoing seek operation. It is also possible that the situation becomes impossible.
[0051]
Therefore, in order to cope with such a situation, a seek operation process in the embodiment described below may be added.
[0052]
Next, seek operation processing in another embodiment will be described. FIG. 3 is a flowchart showing the processing operation of the CPU 11 in the seek operation processing of another embodiment.
[0053]
In FIG. 3, when the seek key is input (step S21), the vol / mute circuit 6 is muted (step S22), and the PI code for the currently receiving broadcasting station is stored in the RAM 11a (step S23). ), It is determined whether or not the timer is being measured (step S24). If the timer is not being measured, the timer is started (step S25), and it is determined whether the time is up (step S26).
[0054]
Note that the timer here is different from the timer in step S9 shown in FIG. 2 described above, and the timer in step S9 is used to determine whether or not to continue the seek operation that is currently being performed. The timer in step S25 in FIG. 3 is for determining whether or not to delete the PI code stored in the RAM 11a during the seek operation. In addition, as a method for determining whether or not the time is up in step S26, it is only necessary to determine whether or not a time-up flag described later is output.
[0055]
Further, it is best to set this timer to 120 sec, for example.
[0056]
If the timer currently being measured has expired, all PI codes currently stored in the RAM 11a are deleted (step S27), and the currently received reception frequency is sought up step by step (step S28). It is determined whether the SD signal at the broadcasting station receiving up is NG or OK (step S29). In step S28, the seek frequency is increased by one step. However, this is determined by the input operation of the seek key, and the seek frequency is decreased by one step. You may do it.
[0057]
If the SD signal of the currently receiving broadcast station is OK in step S29, it is determined whether the IF counter signal of this broadcast station is OK or NG (step S30). If the IF counter signal is OK, it is determined whether or not this broadcasting station is an RDS station (step S31).
[0058]
If this broadcasting station is an RDS station, it is determined whether or not the PI code of this RDS station matches the PI code stored in the RAM 11a (step S32). If it does not match the PI code stored in the RAM 11a, the Vol / Mute circuit 6 is muted off (step S33), and the PI code in the currently receiving broadcasting station is additionally stored in the RAM 11a (step S34). ), This seek operation processing is terminated.
[0059]
If the timer is measuring at step S24, the process proceeds to step S26. If the timer has not expired in step S26, the process proceeds to step S28.
[0060]
In step S31, if the currently receiving broadcast station is not an RDS station, the process proceeds to step S33.
[0061]
If the SD signal is NG in step S29, the IF counter signal is NG in step S30, or the PI code stored in the RAM 11a is matched in step S32, the process proceeds to step S26.
[0062]
FIG. 4 is a flowchart showing the processing operation of the CPU 11 in the timer start process related to the timer being started in step S25.
[0063]
In FIG. 4, the CPU 11 starts a counting operation during the operation of step S25 (step S41), and determines whether or not the count value is equal to or greater than a predetermined value (step S42). If this count value is equal to or greater than the predetermined value, a time-up flag is output (step S43), and this processing operation is terminated.
[0064]
Therefore, according to the RDS receiver in another embodiment, the timer is started simultaneously with the input of the seek key for prompting the seek operation, and when the timer expires, the PI code stored in the RAM 11a is stored even during the seek operation. For example, even if PI codes related to all broadcasting stations currently being broadcasted are stored in the RAM 11a during the seek operation, the broadcast station's seek operation is performed as the timer time elapses. Reception can be enabled.
[0065]
【The invention's effect】
According to the multiplex broadcast receiving apparatus of the first invention of the present invention configured as described above, the program identification data of the broadcast station detected during the seek operation and all the program identification data stored in the storage means If the predetermined operation is detected before the predetermined time elapses, the program identification data of the broadcasting station detected during the seek operation is stored in the storage means, and the seek operation is performed. Re-execution, that is, not only the broadcast program immediately before the seek operation but also the program identification data of the mismatched broadcast program detected during the seek operation is additionally stored in the storage device, so that the storage device stores the program identification data. Even if the same broadcast program as the program identification data is received, the seek operation is continued without stopping, so the desired broadcast program is sought with the broadcast setting shown in FIG. Even if UNA can receive quickly the desired broadcast program, moreover, the input operation number to prompt the seek operation can also be minimized, it is possible to improve the operability.
[0066]
According to the multiplex broadcast receiving apparatus of the second invention, in addition to the effects of the first invention, the program identification data of the broadcasting station detected during the seek operation and all the program identifications stored in the storage means If the data does not match, the timer is started and when a predetermined time has elapsed, the seek operation during operation is stopped and the program identification data stored in the storage means is erased. The program identification data stored in the means can be automatically deleted without requiring any operation, and the operability can be improved.
[0067]
According to the multiplex broadcast receiving apparatus of the third invention, the setting timer is started in response to a predetermined operation, and when the setting time of the setting timer elapses, it is stored in the storage means even during the seek operation. Since the program identification data is automatically deleted, for example, by storing all the program identification data related to the currently broadcasting broadcast station in the storage means, the broadcast station can be received by the seek operation. It is possible to deal with situations where it is impossible.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration inside an RDS receiving apparatus according to an embodiment of a multiplex broadcast receiving apparatus of the present invention.
FIG. 2 is a flowchart showing a processing operation of a CPU in a seek operation process of the RDS receiver according to the present embodiment.
FIG. 3 is a flowchart illustrating a processing operation of a CPU in a seek operation process of an RDS receiver according to another embodiment.
FIG. 4 is a flowchart showing a processing operation of a CPU in a timer process of a seek operation process according to another embodiment.
FIG. 5 is an explanatory diagram simply showing the number of operations related to a seek operation process in the RDS receiver according to the present invention.
FIG. 6 is an explanatory diagram briefly showing the number of operations related to a seek operation process in a conventional RDS receiver.
[Explanation of symbols]
1 Receiving antenna (receiving means)
2 PLL circuit (reception means, seek means)
3 Front-end part (reception means, seek means)
4 IF detection circuit (stationary detection means)
9 RDS demodulation circuit (identification data detection means)
10 Key operation section
11 CPU (timer, setting timer, control means)
11a RAM (storage means)

Claims (3)

Receiving means for receiving a broadcast radio wave arriving from a broadcast station and including a broadcast program and data multiplexed on the broadcast program;
Identification data detection means for detecting program identification data from broadcast radio waves received by the reception means;
A seek means for performing a seek operation for sequentially receiving the broadcast radio waves of each broadcasting station by sequentially changing the reception frequency with respect to the reception means;
Stationary detection means for detecting that the broadcast wave of the broadcast station has been received during the seek operation,
Storage means capable of storing a plurality of the program identification data;
In response to a predetermined operation, the seek unit executes a seek operation, the program identification data immediately before the seek operation is stored in the storage unit, and the program identification of the broadcast station detected by the stationed detection unit during the seek operation If the data matches any program identification data stored in the storage means, a multiplex broadcast receiving apparatus having control means for continuing the seek operation,
Has a timer to keep a predetermined time,
If the program identification data of the broadcasting station detected during the seek operation and all the program identification data stored in the storage means do not match, the control means starts the timer and before the predetermined time has elapsed, A receiving apparatus for multiplex broadcasting, wherein when a predetermined operation is detected, program identification data of a broadcasting station detected during the seek operation is stored in the storage means, and the seek operation is executed again by the seek means. If the program identification data of the broadcasting station detected during the seek operation and all the program identification data stored in the storage means do not match, the control means starts the timer and elapses a predetermined time, 2. The multiplex broadcast receiving apparatus according to claim 1, wherein the seek operation during operation is stopped and the program identification data stored in the storage means is erased. Receiving means for receiving a broadcast radio wave arriving from a broadcast station and including a broadcast program and data multiplexed on the broadcast program;
Identification data detecting means for detecting program identification data from broadcast radio waves received by the receiving means;
A seek unit that sequentially changes a reception frequency with respect to the reception unit to perform a seek operation for sequentially receiving broadcast radio waves of each broadcasting station;
Stationary detection means for detecting that the broadcast wave of the broadcast station has been received during the seek operation,
Storage means capable of storing a plurality of the program identification data;
In response to a predetermined operation, the seek unit executes a seek operation, the program identification data immediately before the seek operation is stored in the storage unit, and the program identification of the broadcast station detected by the stationed detection unit during the seek operation If the data matches any program identification data stored in the storage means, a multiplex broadcast receiving apparatus having control means for continuing the seek operation,
Has a setting timer that counts the set time,
The control means starts the setting timer in response to the predetermined operation, causes the seek means to execute a seek operation, and erases the program identification data stored in the storage means when the set time elapses. A multiplex broadcast receiver characterized by the above.

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