JP3246525B2 - Receiving machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver using RDS data.

[0002]

2. Description of the Related Art Some FM broadcasting stations in Europe provide RDS services. This RDS
The service is a service in which RDS data is added to an original audio signal for broadcasting. The RDS data is a collection of digital data related to a broadcasting station or a program. The RDS data includes a PI code: an identification code of a broadcasting station PS data: character data indicating a broadcasting station name PTY code ... Contains data such as program type identification codes.

[0003] The PTY code indicates the type of a program such as news, pops, education, sports, and information by a 5-bit code.

Then, the RDS data is subjected to an encoding process for error correction, and the RDS data subjected to the encoding process has a frequency of 57 kHz (this is a value three times the frequency of the stereo pilot signal of 19 kHz). The subcarrier signal is balanced-modulated, and the modulated signal is added to a monaural signal or a stereo composite signal and frequency-multiplexed, and the multiplexed signal is transmitted by an FM wave.

Therefore, by using the RDS data, it is possible to receive a specific broadcast station or a specific program,
Traffic information and the like can be obtained.

For example, in the case of using the PTY code, broadcast stations that broadcast sports are sequentially searched, and the searched broadcast stations are sequentially stored in a memory.
Thereafter, it is possible to select a desired content from the stored broadcast stations, for example, select a soccer broadcast in sports (hereinafter, search and storage using the PTY code in this manner). Processing is "PTY search"
).

Incidentally, a function called an EON service has been added to the RDS service in addition to the above basic functions.

That is, for example, when the BBC-R1 station
When only the basic function of the S service is used, as described above,
The BBC-R1 station transmits only its own RDS data. However, when the BBC-R1 station performs the EON service, in addition to the RDS data of the BBC-R1 station, the PIC of the BBC-R2 station, the BBC-Kent station, etc.
The code and the PTY code are also transmitted together. That is,
Broadcasting stations that provide the EON service use their own RDS
In addition to the data, a part of the RDS data of another station related to the own station is transmitted together.

Therefore, if this EON service can be used, a more convenient and customer-friendly receiver can be constructed.

[0010]

However, it takes more than one second to select the next broadcasting station from the receiving state of a certain broadcasting station and determine the type of the program of the broadcasting station based on the PTY code. And The frequency band of FM broadcasting in Europe is 87.5 to 108 MHz, and the frequency interval is 50 kHz.
Therefore, about 100 FM broadcasts can be received on average. Therefore, if a PTY search is performed on the entire FM broadcast band, it takes more than 100 seconds.

Also, if about 100 FM broadcasts can be received, when a PTY search is performed, a considerable number of broadcast stations will be stored in the memory as a result of the PTY search. It is impossible to predict the number of broadcast stations. Also, the number of stations as a result of the PTY search greatly differs depending on the content and time of the program.

Therefore, if the capacity of the memory for storing the result of the PTY search is set to, for example, 30 stations, when the PTY search is performed, the memory may become full before the PTY search is performed for all the FM broadcast bands. is there.

Further, there are cases where programs having exactly the same contents are broadcasted at different frequencies, such as a main station and a satellite station. In such a case, both the main station and the satellite station use the PTY. Since the result is stored in the memory as a result of the search, the number of broadcast stations that can be stored in the memory apparently decreases.

[0014] Of course, if the capacity of the memory for storage is made sufficiently large, the results of all the PTY searches can be stored in the memory, but the use efficiency of the memory deteriorates. Also, since all broadcasting stations having different frequencies, such as the main station and the satellite station, having different frequencies are stored, the same program is selected when a PTY search result is selected. May cause inconvenience.

[0015] Further, the RDS service, particularly the EON service, is in a transitional state due to the circumstances of European countries and broadcasting stations. For this reason, manufacturers have become EON services.
Even if a 100% compatible receiver is released, a country where the EON service is only implemented for about 20%, or EO
If the receiver is used in a country where N service is not provided at all, a situation may occur in which the PTY search does not work for some broadcasting stations or does not work at all.

[0016] Therefore, the receiver is required to provide the EON service with 10
Even if it supports 0%, from the user's point of view, it means that the user has purchased an imperfect receiver that cannot use 100% of the PTY search.

The present invention aims to eliminate the above problems.

[0018]

By the way, considering a synthesizer type receiver, this synthesizer type receiver is generally provided with a preset function. That is, the data of the reception frequency can be stored in the memory with respect to the broadcasting station which is usually received, and when a predetermined key is pressed, the broadcasting station of the stored data can be immediately selected. Have been.

Considering the PTY search, P
When performing a TY search, it is sufficient to perform the PTY search for a broadcasting station that normally receives signals, and it is not necessary to perform a PTY search for a broadcasting station that does not normally receive signals.

The present invention pays attention to the above points, and uses only the basic function of the RDS service and the data of the EON service for a preset broadcasting station.
The TY search is performed.

That is, in the present invention, the memory
Received frequency band according to registered frequency data
In order, and when receiving a broadcast by this scan,
When the receiving broadcasting station is performing RD service, RD
PTY code of S data and PTY code input by listener
And when these PTY codes match,
Receiving information indicating that this PTY code matched
Stored in association with the frequency data of the broadcasting station, the RD
When the S data has EON service data,
EON service included in this EON service data
PTY code of the broadcasting station and the input of the above listener
And compare these PTY codes with each other.
Information indicating that this PTY code matched when
Report on the reception frequency
Data and store the information
The reception of the reception frequency corresponding to is skipped .
It is a receiver.

[0022]

The PTY search is executed in accordance with the data registered in the memory. Then, at the time of this PTY search, when a broadcasting station on which the EON service is implemented is selected, the data of the EON service is used.
The PTY code of the broadcasting station providing the EON service is checked, and the original PTY search for the broadcasting station providing the EON service is skipped.

[0023]

In FIG. 1, reference numeral 10 denotes an FM broadcast receiving circuit configured in a synthesizer system, and a reception signal of an antenna 11 is supplied to an antenna tuning circuit 12 of an electronic tuning system, and an FM of a target frequency f12 is supplied. The broadcast wave signal S12 is extracted.

The signal S12 is transmitted to the high-frequency amplifier 1
3 to the mixer circuit 14 and
An oscillation signal S21 having a frequency f21, for example, f21 = f12 + 10.7 [MHz] (1) is extracted from O21, and this signal S21 is supplied to the mixer circuit 14 as a local oscillation signal. The frequency is converted to a signal S14 (the intermediate frequency is 10.7 MHz).

Then, the intermediate frequency signal S14 is supplied to the FM demodulation circuit 16 through the intermediate frequency amplifier 15, and an audio signal (monaural signal or stereo composite signal) S17 and a modulated signal S31 modulated by RDS data are obtained. The extracted audio signal S17 is supplied to a speaker 19 through a low-pass filter 17 and a low-frequency amplifier 18.

At this time, the VCO 21 is connected to the circuit 2
Together with 2 to 25, the PLL 20 is configured. That is, the signal S21 from the VCO 21 is supplied to the variable frequency dividing circuit 22 and divided into a frequency of 1 / N, and this frequency-divided signal is supplied to the phase comparing circuit 23 and the oscillation circuit 24
An oscillation signal having a reference frequency, for example, a frequency of 50 kHz, is taken out from the control circuit 23, and the oscillation signal is supplied to the comparison circuit 23. The output voltage of the filter 25 is supplied to the tuning circuit 12 as a tuning voltage.

Therefore, in the steady state, the frequency of the frequency-divided signal from the frequency-dividing circuit 22 and the frequency of the oscillation signal of the oscillation circuit 24 are equal. [KHz] = N × 0.05 [MHz] (2), and from the equations (1) and (2), f12 = N × 0.05-10.7 [MHz].

Therefore, if the frequency division ratio N is changed by "1" between 1964 and 2374, the local oscillation frequency f
21 changes from 98.2 MHz to 118.7 MHz at intervals of 50 kHz, so that the reception frequency f12 changes the frequency band of 87.5 MHz to 108.0 MHz in a frequency step of 50 kHz and the frequency division ratio N
Will change correspondingly.

Further, reference numeral 40 denotes a microcomputer for system control, 41 denotes its CPU, 42
Is a ROM in which various processing routines and, for example, the processing routine 100 shown in FIGS. 2 to 5 are written, 43 is a RAM for a work area, and 44 is a memory for storing various data. Are connected to the CPU 41 through the system bus 49.

In this case, the memory 44 is a ROM that can be electrically erased and written, or a RAM (not shown) backed up by a battery. That is, the memory 44 is a non-volatile memory,
The written data can be retained even when the power is turned off.

The memory 44 contains, for example, FIG.
A data table DTBL as shown in FIG. That is, the data table DTBL is divided into areas A00 to A29 for 30 stations as a whole. And area A00
To A29 include frequency division ratio N, PS data (character data of station name), and PI as frequency data for receiving a broadcast.
A code (station identification code) and a PTY code (program type code) are registered in pairs.

Further, in the areas A00 to A29, the flag PT
YF and SKPF are also available. In this case, if there is a broadcasting station broadcasting the type of program desired by the listener, the flag PTYF of the area where the data of the broadcasting station is registered becomes "1". In a broadcasting station that does not need to perform the PTY search, the flag SKPF of the area in which the data of the broadcasting station is registered becomes “1”.

The table DTBL shown in FIG.
1. A case where each data of each station of BBC is registered in A02 and each data of XYZ station is registered in area A03. Note that each station of the BBC implements the EDS service of the RDS service.
It is assumed that only the basic functions of the DS service are implemented.

Further, in this example, as shown in FIG. 7, the data table DTBL is divided into ten areas, areas A00 to A09 are page A, areas A10 to A19 are page B, and areas A20 to A29 are area A20 to A29. C page.

Reference numeral 45 denotes an output port, 46 denotes an input port, 47 denotes a key interface circuit, and 48 denotes a display controller. These circuits 45 to 48 are connected to the CPU 41 through a system bus 49. The port 45 is connected to the frequency dividing circuit 22, and a program described later is executed to set the frequency dividing ratio N in the frequency dividing circuit 22.

Further, the signal S31 from the demodulation circuit 16 is supplied to the demodulation circuit 32 through the band-pass filter 31, and the RDS data S32 is demodulated.
Is the RD for which error correction has been performed in the decoder circuit 33.
S data S33, and this RDS data S33 is
6. Further, a part of the intermediate frequency signal S14 is supplied from the intermediate frequency amplifier 15 to the detection circuit 35 to detect the presence or absence of the intermediate frequency signal S14, and the detection signal S35 is supplied to the port 46.

The key interface circuit 47 includes an up key KUP and a down key KD as operation keys.
W, a page key KPG, a memory key KMM, a PTY search key KPT, a direct key KDI, and numeric keys KN0 to KN9 of "0" to "9" are connected.
8 has an LCD as a display means for displaying a reception state and the like.
51 are connected.

Each of the keys KUP to KN9 is constituted by a non-lock type push switch.
The use or use of these keys KUP to KN9 will become clear later, but as shown in FIG. 7, each time the page key KPG is pressed, the data table DTBL
A to C pages of A → B → C → A → B → ...,
The pages are sequentially selected one by one and cyclically, and one of ten areas belonging to the selected page is selected by the numeric keys KN0 to KN9.

Therefore, for example, the area A00 is selected by the key KN0 area A11 on page A, the key KN1 area A29 on page B, and the key KN9 on page C.

Each operation of the receiver is controlled by the microcomputer 40 and executed as follows.

<< PTY Search >> When performing a PTY search, first, a PTY search key KPT is pressed.

Then, the processing of the CPU 41 is switched to the routine 10
0, step 101, then step 10
In step 2, it waits for a key input. Then, when the up key KUP or the down key KDW is pressed, the process of the CPU 41 proceeds from the step 102 to the step 103. In the case of, the process proceeds from step 103 to step 104.

[0043] Then, in step 104, the variable DPT is incremented or dec backside <br/> bets "1". In this case, the variable DPT is data for the listener to specify the type of the program. Among the types of programs that can be specified by the PTY code, the PT has a value equal to the variable DPT.
The program of the type indicated by the Y code is selected as a result. In step 104, when the value of the variable DPT exceeds the maximum value (= 31) or the minimum value (= 0) of the PTY code, the value is set to the minimum value or the maximum value.

Subsequently, the processing of the CPU 41 proceeds to step 10
5, in this step 105, the character data according to the variable DPT is supplied to the controller 48. For example, as shown in FIG.
Characters 51A designating the type of program, such as "SPORTS", are displayed corresponding to the PT, and then the process returns to step 102.

Therefore, each time the up key KUP or the down key KDW is pressed, the variable DPT changes each time the key is pressed, and the LCD 5 corresponds to the value of the variable DPT.
The character 51A such as "SPORTS" indicating the type of the program displayed in 1 is changed to the next character or the previous character.

When the PTY search key KPT is pressed again when the character 51A (indicating the type of program) for which a PTY search is desired is displayed on the LCD 51, the processing of the CPU 41 proceeds from step 103 to step 111. At 111, the variable n is cleared to n = 0 and the flags PTYF and SKPF of the data table DTBL are set.
Are all reset to "0". Note that the variable n is a variable that specifies the areas A00 to A29 of the data table DTBL, and changes between n = 0 to 29 during a PTY search.

Next, at step 112, the flag SKPF of the area An indicated by the variable n is set to "0" or "1".
Is checked.

Then, in this case, if SKPF = "0", the process proceeds from step 112 to step 113,
In this step 113, the division ratio N written in the area An of the data table DTBL is read from the area An indicated by the variable n, and the read division ratio N is changed through the port 45. The frequency is set in the frequency dividing circuit 22, and the receiving circuit 10 is set to the receiving state of the frequency f12 corresponding to the frequency dividing ratio N.

For example, if n = 0 and the variable n indicates the area A00, N = 2190 is read from the area A00 and set to the variable frequency dividing circuit 22 through the port 45. Therefore, in this case, f12 = 98.8 MHz
, And the BBC-R1 station is selected.

Next, at step 114,
By checking the output signal of the decoder 33, it is checked whether or not the currently receiving broadcasting station is performing the RDS service.

When the RDS service is being performed, the process proceeds from step 114 to step 115. In this step 115, it is determined whether or not the PTY code included in the RDS data S33 obtained from the decoder 33 is equal to the variable DPT. It is checked whether the type of the currently received broadcast program is the type desired by the listener. If the type is the type desired (when PTY code = DPT), the process proceeds to step 1.
15 to step 116, in which the variable n in the data table DTBL at this time is
The flag PTYF of the area An indicated by is set to “1”,
Thereafter, the processing proceeds to step 117.

If it is determined in step 115 that the type of the broadcast program being received is not the type desired by the listener (when PTY code ≠ DPT), the process proceeds from step 115 to step 117.

Then, in step 117, by checking the output signal of the decoder 33, it is checked whether or not the currently receiving broadcasting station provides the EON service, and the currently receiving broadcasting station provides the EON service. If not, the process proceeds from step 117 to step 125.

If it is determined in step 114 that the currently receiving broadcast station does not provide the RDS service,
The process proceeds from step 114 to step 125.

Then, in step 125, the variable n
Is incremented by “1”, and then step 1
At 26, it is checked whether n <30,
When n <30, the processing is performed from step 126 to step 1
Return to 12.

Therefore, if all of the flags SKPF of the data table DTBL are “0” and all of the broadcasting stations registered in the data table DTBL do not provide the EON service, step 112 ~ 11
7, 125 and 126 are repeated. By this repetition, the variable n increases by “1”, and the broadcasting stations having the division ratio N registered in the data table DTBL are sequentially tuned one by one, and the tuned broadcasting stations are sequentially tuned. When the type of program of the station is the type desired by the listener, the flag PTYF of the area An in which the division ratio N of the broadcast station is registered among the areas A00 to A29 of the data table DTBL is "1". Is set to

On the other hand, as shown in FIG.
If the broadcasting station that performs the EON service is registered in the DTBL, the broadcasting station is selected and step 11 is performed.
In 7, when execution of the EON service is checked, the process proceeds from step 117 to step 121.

In step 121, the RDS data S output from the decoder 33 at this time is
33, the PTY code and the PI code of the EON service included in the PTY are extracted, and the extracted PTY
The code is the PI retrieved from the areas A00 to A29.
It is registered in an area where a PI code equal to the code is registered.

However, in this example, even if the PI code not registered in the data table DTBL is included in the EON service data, the PI code and the PT
Y code is ignored. Therefore, the data table DT
PI code and PTY code not registered in BL are
There is no additional registration based on EON service data.

For example, if n = 0 and the BBC-R1 station is selected in step 113, the BBC-R2 station, the BBC-Kent station, and the BBC-
-PI code and PTY code of other BBC stations such as R3 station are obtained. However, the data table DTBL contains BB
C-R1 stations, BBC-R2 stations, since BBC-Kent station is registered, the BBC-R2 stations, the PTY code of BBC-Kent station is updated (referred to herein to "update" is, P The same applies to the case where the value of the TY code does not substantially change.

Then, in step 122, the program proceeds to step 121 in the areas A00 to A29 of the table DTBL.
Flag SKPF of the area where the PTY code has been updated
Is set to “1”. In this case, BBC-R2
Since the PTY codes of the stations and the BBC-Kent stations have been updated, the area A in which the data of these broadcasting stations is registered
01, A02 flags SKPF, SKPF are set to "1" .
Next, in step 123, among the PTY codes of the data table DTBL, the PTY code updated in step 121 is compared with the variable DPT. In this case, since the PTY codes of the BBC-R2 station and the BBC-Kent station have been updated in step 121, the BBC-R
The PTY codes of the two stations, the BBC-Kent stations, are compared with a variable DPT. If the PTY code is in the state shown in FIG. 6 and the variable DTP is "3", then BBC-2
The station's PTY code matches the variable DTP.

Subsequently, in step 124, of the comparison results in step 123, the PTY matching the variable DTP
The flag PTYF of the area where the code is registered is set to “1”, and then the process proceeds to step 125. In this case, in step 123, the PTY of the BBC-2 station
Since the code matches the variable DTP, step 124
In, the flag PTYF of the area A01 in which the BBC-2 station is registered is set to "1".

Thus, for example, the data table shown in FIG.
If DTBL and DTP = 3, BBC-R1
When a station is selected, BBC-2 corresponding to DTP = 3
The flag PTYF of the area A01 in which station data is registered is set to "1". The BBC-R1 station sends E
BBC-R2 station with ON service, BBC-Kent
Area data of the station has been registered A01, A02 flag of
SKPF, SKPF are set to "1".

That is, steps 117, 121 to 12
According to No. 4, when a broadcast station (for example, BBC-R1 station) that implements the EON service is selected, the broadcast station (B
The flags SKPF and SKPF of the areas A01 and A02 in which the data of the BC-R2 station and the BBC-Kent station are registered are set to "1". Also, it is determined whether a broadcasting station providing the EON service is broadcasting a desired type of program.
The TY code is checked, and the flag PTYF of the data area A01 of the broadcasting station (BBC-2 station) broadcasting the corresponding program is set to "1".

Thereafter, the processing of steps 112 to 126 is repeated until n ≧ 30.
At 25, for example, n = 1, and the process proceeds to step 1
When the process proceeds from step 25 to step 112 through step 126, the flag SKPF of the area A01 indicated by n = 1 is set to "1".
To step 125. Also, when n = 2, since the flag SKPF of the corresponding area A02 is set to "1", the process proceeds from step 112 to step 125.

That is, when a broadcast station that is EON-served is selected, the flag SKPF of the broadcast station that is EON-served is set to “1”.
The selection of the broadcast station is skipped in step 112.

Then, even if the tuning is skipped, the result of the comparison between the PTY code and the variable DTP for the skipped broadcasting station is stored in the flag PTYF in step 123.

Thus, according to steps 112 to 126, the result of the PTY search is the flag PTYF
Is set to In addition, the PTY search is skipped for a broadcasting station provided with the EON service according to the flag SKPF.

Then, when the above processing is performed on the data of all the broadcasting stations registered in the data table DTBL, since n = 30 in step 125, the processing of the CPU 41 starts from step 126. Proceeding to step 131, in this step 131, the variables n and CNTR are cleared to n = 0 and CNTR = 0. The variable CNTR is “1” in the data table DTBL.
This is for knowing the number of the flag PTYF.

Then, in step 132, the flag PTYF is extracted from the area An indicated by the variable n among the areas A00 to A29 of the data table DTBL, and whether the extracted flag PTYF is "0" or not is determined. It is checked whether it is 1 ". And PTYF =
If "1", the process proceeds from step 132 to step 133, where the value of the variable n is stacked in the buffer area of the RAM 43.

Subsequently, at step 134, the variable CN
TR is incremented by "1", then step 13
At 5, the variable n is incremented by "1",
Thereafter, it is checked in step 136 whether n <30. If n <30, the process returns from step 136 to step 132.

Further, in step 132, the flag PTYF taken out of the area An indicated by the variable n is set as PTYF =
If “0”, the process proceeds from step 132 to step 135.

Therefore, steps 132 to 136 are repeated until n ≧ 30, and among the areas A00 to A29 of the data table DTBL, the variable n indicating the area where PTYF = "1" is stored in the buffer area of the RAM 43. Are sequentially stacked. That is, in the buffer area of the RAM 43, the variable n indicating the area where the data of the broadcasting station searched by the PTY search is registered is stacked. At this time, the number of the stacked variables n is counted by the variable CNTR.

When the above processing is performed on the data of the broadcasting station registered in the data table DTBL,
At this time, since n = 30 in step 135, the processing of the CPU 41 proceeds from step 136 to step 1.
Go to 41. The processing up to step 136 is
This is a PTY search.

<< Tuning using the result of PTY search >> P
When the TY search key KPT is pressed, the PTY search is executed as described above.
In step 141, the variable i is cleared to i = 0, and then in step 142, R
The i-th variable n stacked on the AM 43 is extracted. Then, in step 143, of the areas A00 to A29 of the data table DTBL, step 142
The frequency dividing ratio N registered here is extracted from the area indicated by the variable n extracted in step (1), and the extracted frequency dividing ratio N is set in the variable frequency dividing circuit 22 through the port 45.

Therefore, from this point on, from the area A00 to A29 of the data table DTBL, the division ratio N of the area indicated by the variable n stacked in the i-th RAM 43 is indicated.
Stations are selected.

Subsequently, in step 144, of the areas A00 to A29 of the data table DTBL, step 14
The PS data indicating the name of the broadcasting station registered here is extracted from the area An indicated by the variable n extracted in 2, and the PS data is supplied to the controller 48.
Also, all the variables n stacked on the RAM 43 are fetched from the RAM 43. The fetched variables n are converted into character data indicating pages A to C and keys KN0 to KN9 in FIG. Supplied. Thus, as shown in FIG. 9A, for example,
The result of the TY search is displayed.

That is, the characters 51B indicating the station name of the broadcasting station selected in step 143 are displayed by the PS data supplied to the controller 48. The page corresponding to the area An (indicated by the variable n) and the numeric key KNj are obtained from the character data converted from the variable n.
(J = 0 to 9) is displayed by the characters 51C and 51D. Note that the character 51C indicates a page in which data of a broadcast station whose station name is displayed by the character 51B is registered, and a numeric key KNj. In this case, the display of the characters 51A to 51D is a blinking display.

Therefore, in this case, steps 142-
According to 144, the first broadcast station is selected from among the broadcast stations broadcasting the type of program desired by the listener,
In addition, information on the broadcast station or the like is displayed.

Further, the processing of the CPU 41 is
After step 4, the process proceeds to step 145.
In step 143, it is checked whether, for example, four seconds have elapsed since the execution of step 143. If not, the processing of the CPU 41 proceeds from step 145 to step 146.
It is checked whether UP has been pressed, and if not, the process returns from step 146 to step 145. When the step 143 is executed, the key KUP is monitored for four seconds in steps 145 and 146.

If the key KUP is depressed during the four seconds, the process proceeds from step 146 to step 147. In this step 147, the variable i is incremented by "1".
It is checked whether .ltoreq.CNTR. If i.ltoreq.CNTR, the process returns from step 148 to step 142.

Therefore, in this case, step 142,
At 143, the second broadcast station as a result of the PTY search is selected, and at step 144, the
For example, as shown in FIG. 8B, information about the second broadcast station or the like is blinked and displayed on D51.

In step 148, i> CNTR
, The process proceeds from step 148 to step 141, where i = 1.

Therefore, within four seconds after the channel selection and display are performed in steps 142 to 144 (at this time,
When the key KUP is pressed, the broadcast stations searched by the PTY search are sequentially and repeatedly selected according to the variable n stacked in the RAM 43.

As described above, if a certain broadcasting station is selected and the key KUP is not pressed as it is, when 4 seconds have passed since the execution of step 143, the processing proceeds from step 145 to step 151, and the processing proceeds to step 151. At this time, a predetermined command is supplied from the CPU 41 to the controller 48, whereby the display on the LCD 51 is changed from the blinking display up to that point to a continuous display without changing the display content, for example, as shown in FIG. 8C. After that, the routine 100 is ended in step 152.

Therefore, after the PTY search, the LCD 51
When the key KUP is pressed while is blinking, PTY
Among the broadcasting stations obtained as a result of the search, it is possible to further select a broadcasting station having the desired broadcasting content of the listener. For example, a PTY search for a broadcasting station that broadcasts sports,
Among them, a broadcast station broadcasting soccer can be selected. Then, after the channel selection, if the key KUP is left without being pressed, the channel selection state is determined.

Thus, the PTY search key KPT is pressed.

A desired program type is selected by the key KUP or KDW.

The PTY search key KPT is pressed again.

When the above operation is performed, the data table DTBL
A PTY search is executed for the broadcasting stations registered in.

Then, the key KUP is further pressed.

With this operation, each time the key KUP is pressed, the broadcast station of the type of the program selected can be further selected to select the broadcast station of the desired broadcast content.

<< Tuning of Preset Station >> This is a general tuning, in which a broadcasting station registered in the data table DTBL is selected. This is performed by the page key KPG and the numeric keys KN0 to KN9.

That is, when the page key KPG is pressed, each time the key is pressed, the pages of the data table DTBL are sequentially and cyclically selected one by one as shown in FIG. Characters indicating the selected page are displayed on LCD 51.

Then, when the page in which the division ratio N of the desired broadcasting station is selected is selected, the numeric keys KN0 to KN0
Numeric key K of N9 corresponding to the desired broadcasting station
Press Nj. Then, data table DTBL area A00 ~
From A29, the division ratio N written in the area of the page selected by the page key KPG, which is designated by the numeric key KNj, is read out. It is set in the variable frequency dividing circuit 22 through the port 45.

Further, when the selected broadcasting station provides the RDS service, PS data indicating the name of the transmitting station is read from the area from which the frequency division ratio N has been read out earlier in the data table DTBL. This PS data is stored in the controller 48
And the broadcast station name is displayed on the LCD 51.

Therefore, the broadcast station registered in the data table DTBL can be selected by the page key KPG and the numeric keys KN0 to KN9.

<< Direct tuning >> This is the reception frequency f
This is a case where the number f12 is directly input to select the frequency f12. Then, in this case, first, the direct key KDI is pressed, and then the number indicating the frequency f12 to be received is directly input from the number keys KN0 to KN9, and then the direct key KDI is pressed again. For example, to receive 90 MHz, the direct key KDI, the "9" key KN9,
Press the "0" key KN0 and the direct key KDI in order.

When such a key operation is performed, the frequency f12 indicated by the numerical value input by the numeric keys KN0 to KN9 is converted into the frequency division ratio N, and the frequency division ratio N is set to the port 4
5 is set in the variable frequency dividing circuit 22.

Therefore, an arbitrary frequency f12 can be directly designated by the direct key KDI and the numeric keys KN0 to KN9 to select a station. Also, if the selected broadcasting station is R
When DS data is being transmitted, R
PS data indicating a broadcast station name is extracted from the DS data D32, and the PS data is supplied to the controller 48.
The LCD 51 displays the broadcast station name.

<< Scan Reception >> This is a case where the FM broadcast wave band is scanned, and if the broadcast wave signal is received, the reception is continued. Then, in this case, the up key KUP or the down key KDW is pressed.

Then, the frequency dividing ratio N of the variable frequency dividing circuit 22 becomes
Increment or de from the value of that time by "1"
Is click decrement, thereby, the receiving frequency f12 is 50kHz
It goes up or down at a time. When the broadcast wave signal S12 is received at a certain reception frequency f12, an intermediate frequency signal S15 is obtained, and the microcomputer 40 is notified by the detection signal S35 that the signal S12 has been received. Then, the scan at the reception frequency f12 is stopped at the reception frequency f12 at which the intermediate frequency signal S15 is obtained, and thereafter, the reception state at the frequency f12 at which the scan is stopped is continued.

When the reception frequency f12 reaches the upper limit or the lower limit, the scanning stops there.

Therefore, scan reception can be performed by the up key KUP or the down key KDW.

<< Preset of reception frequency >> This is to store an arbitrary reception frequency f12 in an arbitrary area of the data table DTBL.
Is registered.

In this case, the frequency f12 to be registered is selected by one of the above methods. Further, a page to be registered is selected by a page key KPG. In addition, this tuning,
The order of selecting pages to register is free.

Then, the user presses the numeric key KNj while holding down the memory key KMM.

Then, the frequency division ratio N indicating the reception frequency f12 at this time, the PS data, the PI code, and the PTY code obtained from the RDS data S33 are stored in the data table DT.
The data is written in the area corresponding to the pressed numeric key KNj on the selected page among the BL areas A00 to A29.

Thus, the presetting of the reception frequency f12 is performed, and the broadcasting station of this preset frequency is hereinafter referred to as “selection of the preset station”.
You can tune in. Also, << PTY search >>, << P
The channel selection using the result of the TY search is executed for the preset broadcast station.

[0110] "Other" Note that, in step 146, when the down key KDW is pressed, in step 147, the variable i is dec backside <br/> bets, to the reverse channel selection and display in step 142 to 144 Can also. Further, a dial and a rotary encoder may be used instead of the keys KUP and KDW, and the same processing as the case of the keys KUP and KDW may be performed by the encoder output. Furthermore, the numeric keys KN0-K
A plurality of tuning keys similar to those provided in N9 are provided, and the page key K
The broadcast station of the page selected by the PG can be selected by the selection key.

Also, in step 115, the flag PT
If the variable n is stacked in the RAM 43 instead of setting YF, the processing of steps 131 to 136 can be omitted. Further, if the AM broadcast can be received and preset, for example, after step 111, a step of checking whether the received band is the FM broadcast or the AM broadcast is provided.
124 may be skipped.

Further, in the above description, step 121
, PI not registered in the data table DTBL
Even if the code is included in the EON service data,
Although the PI code and the PTY code are ignored, they can be registered in the data table DTBL without being ignored.

[0113]

According to the present invention, the PTY search can be made to function even in a country or a broadcasting station where the EON service is not implemented. And in this invention, PT
When performing a Y search, it is sufficient to perform a PTY search for a broadcasting station that normally receives signals, and it is not necessary to perform a PTY search for a broadcasting station that does not normally receive signals. Since the PTY search is performed for the registered broadcast stations, the memory area required for the PTY search can be reduced even in an area where a large number of broadcast stations can be received.

Further, all the results of the PTY search can be obtained, and no search omission occurs. Further, a broadcast station having the same program content but a different frequency is not stored as a result of the PTY search, which is convenient. Also, since the PTY search is performed for the broadcasting stations registered in the data table DTBL, the PTY search is completed faster than in the case where the PTY search is performed in the entire FM broadcast wave band. You can tune in.

Further, when a broadcasting station (for example, BBC-R1 station) implementing the EON service is selected,
The broadcast stations (BBC-R2 station, BBC-Kent station) provided with the EON service by the selected broadcast station are sent E-mails.
Perform PTY search using ON service data,
For broadcast stations that provide EON services, the original P
Since the TY search is skipped, the time required for the PTY search can be reduced.

Further, even if a broadcasting station that only performs the basic function of the RDS service and a broadcasting station that performs the EON service coexist, a PTY search using the basic function of the RDS service and an EON service Since the PTY search using the EON service functions, the PTY search can be performed without making the user feel that the EON service is performed or not. And in the future, EON service will be 10
When 0% is implemented, the receiver will only execute a PTY search using its EON service, and there is no need to replace the receiver.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an example of the present invention.

FIG. 2 is a flowchart showing a part of an example of the present invention.

FIG. 3 is a flowchart showing an example continued from FIG. 2;

FIG. 4 is a flowchart showing an example continued from FIG. 3;

FIG. 5 is a flowchart showing an example continued from FIG. 4;

FIG. 6 is a diagram illustrating an example of a data table.

FIG. 7 is a diagram showing a relationship between a data table and operation keys.

FIG. 8 is a diagram illustrating an example of a display state.

FIG. 9 is a diagram illustrating an example of a change in a display state.

[Explanation of symbols]

 Reference Signs List 10 receiving circuit 12 antenna tuning circuit 14 mixer circuit 16 FM demodulation circuit 19 speaker 20 PLL 21 VCO 22 variable frequency dividing circuit 32 demodulation circuit 33 decoder circuit 35 detection circuit 40 microcomputer 41 CPU 42 ROM 43 RAM 44 nonvolatile memory 48 display controller 51 LCD 100 Processing routine KUP to KN9 Operation keys DTBL data table

Claims (4)

(57) [Claims] 1. A sequentially scanning the reception frequency band according to the frequency data registered in the memory, upon receipt of a broadcast by the scan, the broadcast station being received is R
When performing DS service , PTY of RDS data
The PTY code is compared with the PTY code input by the listener, and when these PTY codes match, the PTY code
Information that indicates that the
When the RDS data has EON service data, the EDS included in the EON service data is stored.
And PTY code of the broadcasting station being serviced, compared with the PTY code input of the listener, when these PTY codes match, the PTY code
Information indicating that the EON service is
A receiver that stores the reception frequency data of the broadcasting station in association with the reception frequency data and skips reception of the reception frequency corresponding to the stored information. 2. A sequentially scanning the reception frequency band according to the frequency data registered in the memory, upon receipt of a broadcast by the scan, the broadcast station being received is R
When performing DS service , PTY of RDS data
The PTY code is compared with the PTY code input by the listener, and when these PTY codes match, the PTY code
Information that indicates that the
When the RDS data includes EON service data, the EDS included in the EON service data is stored.
And PTY code of the broadcasting station being serviced, compared with the PTY code input of the listener, when these PTY codes match, the PTY code
Information indicating that the EON service is
In addition to storing the received frequency data in association with the received frequency data of the broadcasting station, the reception of the received frequency corresponding to the stored information is skipped, and after the end of the scan, according to the stored information.
A receiver that selects a reception frequency and performs reception at the selected reception frequency. 3. A receiving circuit of a synthesizer system, a memory for storing a set of frequency data for selecting a broadcasting station, and a PI code of RDS data, and a memory for storing a set of keys according to a key operation. A control circuit for extracting the frequency data and supplying the extracted frequency data to the receiving circuit to select a broadcast station having a frequency according to the frequency data; and a RDS from the broadcast wave signal received by the receiving circuit. A demodulation circuit for demodulating data; and input means for designating a PTY code indicating a type of a program. The scan receiving unit scans a frequency according to the frequency data stored in the memory. The PTY code included in the received RDS data and the PT specified by the input means
Compare with the Y code, and when these PTY codes match, this PTY code
Information that indicates that the
When the RDS data has data according to the EON service, the PI code obtained by the EON service is sequentially compared with the PI code stored in the memory, and the RDS data is obtained by the EON service. When the PI code matches the PI code stored in the memory, the PTY code obtained together with the PI code obtained by the EON service and the PTY code specified by the input means are used.
TY code is compared, and when these PTY codes match, this PTY code
Skip but information indicating that matched stores in association with the frequency data stored in a PI code and the set obtained by the EON service, the scan reception of a reception frequency according to the stored information Receiver to make it. 4. A receiving circuit of a synthesizer system, a memory for storing a set of frequency data for selecting a broadcasting station, and a PI code of RDS data, and stored in the memory in accordance with a key operation. A control circuit for extracting the frequency data and supplying the extracted frequency data to the receiving circuit to select a broadcast station having a frequency according to the frequency data; and a RDS from the broadcast wave signal received by the receiving circuit. A demodulation circuit for demodulating data; and input means for designating a PTY code indicating a type of a program. The scan receiving unit scans a frequency according to the frequency data stored in the memory. The PTY code included in the received RDS data and the PT specified by the input means
Compare with the Y code, and when these PTY codes match, this PTY code
Information that indicates that the
When the RDS data has data according to the EON service, the PI code obtained by the EON service is sequentially compared with the PI code stored in the memory, and the RDS data is obtained by the EON service. When the PI code matches the PI code stored in the memory, the PTY code obtained together with the PI code obtained by the EON service and the PTY code specified by the input means are used.
TY code is compared, and when these PTY codes match, this PTY code
The but information indicating that matched stores in association with the frequency data stored in a PI code and the set obtained by the EON service, the scan reception of a reception frequency according to the stored information A receiver that skips and selects a reception frequency according to the stored information after the scan reception is completed, and performs reception at the selected reception frequency.