JP3249688B2 - FM multiplex broadcast receiver with multiplex broadcast program preset function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM multiplex broadcast receiver having a multiplex broadcast program preset function, and more particularly to separating and demodulating FM multiplex broadcast program information specified by a service category number and a program number from an FM signal. With multi-broadcast program preset function to display on the display screen
The present invention relates to an M multiplex broadcast receiver.

[0002]

2. Description of the Related Art In recent years, teletext programs (weather forecasts, news, etc.) and traffic information programs (traffic information for each area and each expressway) are multiplexed and transmitted to FM broadcast signals, and are displayed on display devices of FM receivers. The service to display is starting. In such FM multiplex broadcasting, the FM broadcasting station multiplexes a large number of FM multiplex broadcast program information identified by a service category and a program number into an FM broadcast signal and transmits the multiplexed FM broadcast signal. Therefore, the service category Si and the program number PNj are inputted by the keys provided on the FM multiplex broadcasting receiver, and the desired F
When the M multiplex broadcast program is specified, the FM multiplex broadcast receiver receives and demodulates the specified broadcast program and displays it on the display device. Such an FM multiplex broadcast receiver has a preset channel selection function. The preset tuning function stores a tuning frequency in a preset memory in advance corresponding to each of a plurality of preset keys, and operates a predetermined preset key at the time of tuning to select a desired frequency in one shot. Function.

[0003]

Such a preset channel selection function is effective for channel selection of an FM broadcast having a predetermined frequency.
There is no effect on reading out a teletext broadcast program multiplexed with an FM broadcast signal such as teletext. To select a text broadcast program, select a desired category in the text multiplex broadcast reception mode, and then input a desired program number (actually a key-in number corresponding to the program number) while displaying a table of contents program to perform a text broadcast. You have to select a program,
Operation is troublesome. In particular, the text broadcast program may be different for each FM broadcast station, and every time a channel is selected, a menu screen must be opened and the above-mentioned text broadcast program must be selected, which is troublesome. As described above, it is convenient if a multiplex broadcast program (text broadcast program) multiplexed with an FM broadcast signal and sent can be called in a preset manner in the same manner as the preset channel selection.

Accordingly, it is a first object of the present invention to provide a multiplex program preset device capable of displaying a multiplex program corresponding to the preset key on a display screen by operating the preset key. A second object of the present invention is to provide each FM
An object of the present invention is to provide an FM multiplex broadcast receiver having a multiplex broadcast program preset function capable of storing a program number corresponding to a preset key for each service category in multiplex broadcast and displaying a desired program by operating the preset key. . A third object of the present invention is to provide a FM multiplex broadcast receiving function having a multiplex broadcast program preset function capable of storing a combination of a service category and a program number corresponding to each preset key and displaying a desired program by operating the preset key. Is to provide a machine. A fourth object of the present invention is to provide an FM multiplex broadcast receiver having a multiplex broadcast program preset function capable of storing preset information in a preset memory by a simple operation.

[0005]

The first and second objects are to provide an operation unit having a preset key and a service category selection key, and a program corresponding to the preset key for each service category in each FM multiplex broadcast. A preset memory for storing a number, a display device for displaying an image corresponding to the FM multiplex program, and, when a predetermined preset key is operated after selecting a service category at the time of receiving a predetermined FM broadcast, when the predetermined preset key is operated, This is achieved by an FM multiplex broadcast receiver provided with a control unit for obtaining a corresponding program number from a preset memory and displaying an image specified by the program number on a display device.

The first and third objects are to provide an operation unit having a plurality of preset keys and a service category selection key, and a preset for storing a service category and a program number corresponding to each preset key for each FM multiplex broadcast. A memory, a display device for displaying an image corresponding to an FM multiplex program, and a preset memory for storing a service category and a program number corresponding to the operated preset key when a predetermined preset key is operated during reception of a predetermined FM broadcast. This is achieved by an FM multiplex broadcast receiver having a control unit for displaying an image corresponding to the program information indicated by the service category and the program number on a display device.

[0007] The first and fourth objects are to provide an operation unit provided with a plurality of preset keys, a service category selection key, and an auto preset key for automatically presetting a program number in correspondence with each preset key; For each FM multiplex broadcast, a preset memory for storing a plurality of combinations of service categories and program numbers corresponding to the respective preset keys, and when an auto preset key is operated at the time of receiving a predetermined FM broadcast, the preset multiplexed to the FM broadcast signal. The transmitted program index data is demodulated, and based on the program index data, a j-th (j = 1, 2,...) Preset key is associated with a j-th program of each service category. Registration means for storing the number in the preset memory; and when the preset key is operated, the preset memory is stored in correspondence with the preset key. Is achieved by FM multiplex broadcasting receiver having a control unit for displaying the program information on a display screen of a predetermined combination of 憶 service being category and program number are indicated.

The first and fourth objects are to provide a plurality of preset keys, a service category selection key, and an auto preset key for automatically presetting a program number in correspondence with each preset key for each service category. An operation unit provided, a preset memory for storing a program number corresponding to each preset key for each service category in each FM multiplex broadcast, and a service in an auto preset mode in which the auto preset key is operated when a predetermined FM broadcast is received. The table of contents information of the service category selected by the category selection key is demodulated, and the j-th program of the service category is stored in the preset memory in correspondence with the j-th (j = 1, 2,...) Preset key. Registration means for storing, and upon receiving a predetermined FM broadcast,
When a predetermined preset key is operated after a service category is selected, an FM multiplex having a control unit for displaying, on a display screen, program information indicated by a program number stored in a preset memory corresponding to the preset key. Achieved by broadcast receiver.

[0009]

A program number is stored in a preset memory in correspondence with a preset key for each service category in each FM multiplex broadcast, and when a predetermined preset key is operated after selecting a service category when receiving a predetermined FM broadcast. The program number corresponding to the operated preset key is obtained from the preset memory, and the image indicated by the program number is displayed on the display device. In addition, a service category and a program number are stored in a preset memory in correspondence with each preset key for each FM multiplex broadcast, and when a predetermined preset key is operated during reception of a predetermined FM broadcast, the operated preset key is operated. Is obtained from the preset memory, and an image corresponding to the program information indicated by the service category and the program number is displayed on the display device.

Further, when the auto-preset key is operated at the time of receiving a predetermined FM broadcast, the program index data multiplexed with the FM broadcast signal and transmitted is demodulated, and based on the program index data, the j-th ( j = 1, 2,...) and the j-th
The program number stored in the preset memory is stored in the preset memory, and when a preset key is operated upon receiving a predetermined frequency, a program designated by a predetermined combination of the service category and the program number stored in the preset memory corresponding to the preset key is stored. Display information on the display screen. Also, the specified FM
In the auto-preset mode in which the auto-preset key is operated at the time of receiving a broadcast, the table of contents information of the service category selected by the service category selection key is demodulated, and the j-th (j = 1, 2,...) The j-th program of the service category is stored in the preset memory in correspondence with the preset category, and when a predetermined preset key is operated after selecting the service category at the time of receiving a predetermined FM broadcast, the preset memory corresponding to the preset key is operated. Is displayed on the display screen.

[0011]

【Example】

(a) Overall Configuration FIG. 1 is a configuration diagram of an FM multiplex broadcast receiver according to the present invention.
The FM multiplex broadcast receiver demodulates the FM audio signal, outputs the demodulated signal from a speaker, and multiplexes the FM broadcast signal with FM multiplex broadcast data such as a text broadcast program or a traffic information program (FM multiplex broadcast program). ) Is separated and demodulated and displayed on a display device. As shown in FIG. 2, the FM multiplex broadcast data is composed of 272 blocks per frame, 190 blocks out of 272 blocks are data blocks, 82 blocks are parity blocks transmitting only parity, and the parity block is a data block. They are distributed.

Each data block comprises a 16-bit block identification code (BIC), 176-bit data, a 14-bit CRC code, and an 82-bit parity (horizontal code) for error detection and correction. ing. The parity block includes a 16-bit block identification code BIC and a 190-bit parity (vertical code).
And an 82-bit parity for error detection and correction (horizontal code)
It is composed of The identification code of the data block in the first 13 blocks is BIC1, the identification code of the data block in the next 123 blocks is BIC3, the identification code of the data block in the next 13 blocks is BIC2, and the last Among the 123 blocks, the identification code of the data block is BIC3, and the identification code of the parity block is BIC4. Each of the 16-bit block identification codes BIC1 to BIC4 has, for example, a block synchronization pattern shown in FIG.

Block synchronization can be achieved by detecting the block identification code for each block.
Every two blocks (the block identification code BIC4 followed by BI
Frame synchronization can be achieved (by detecting C1). In other words, when the number of times the block identification code cannot be detected in the order described above occurs at a predetermined rate, block synchronization is lost, and when frame synchronization is not achieved at a predetermined rate, frame synchronization is lost. Also, since the data block contains a CRC code, a CR
C check can be performed. Furthermore, since parity (vertical code, horizontal code) for error detection and correction is included, error detection and error correction processing can be performed using these parities.

In FIG. 1, reference numeral 1 denotes an antenna, 4 denotes a front end (F / E), not shown, which includes an antenna tuning circuit, a high frequency amplifier circuit, a local oscillator, a mixer, etc., 5 denotes a PLL circuit, and 6 denotes a PLL circuit. A low-pass filter 7 is an intermediate frequency amplification / FM detector (IF / DET). PLL
The circuit 5, the low-pass filter 6, and the local oscillator incorporated in the front end 4 constitute an electronic tuning device, and set the local oscillator to the receiving frequency (the frequency of the FM broadcasting station selected by the tuning operation).
And a mixer in the front end 4 outputs an intermediate frequency signal.

Reference numeral 11 denotes a noise canceller / stereo demodulation circuit (NC / MP) for performing noise cancellation and stereo demodulation.
X). 12 is a filter circuit for extracting an L-MSK modulation signal component from the FM detection signal, 13 is an L-MSK demodulation circuit that performs delay detection on the L-MSK modulation signal and reproduces a bit clock and demodulates a bit data sequence, and 14 is A synchronization circuit 15 for detecting block synchronization and frame synchronization is an error detection and correction unit, which includes a CRC check unit 15a and an error correction circuit 15b. CRC check unit 15a
Performs a CRC check for each block, and the error correction circuit 15b subjects the bit data string to PN decoding based on the block synchronization and frame synchronization detection signals input from the synchronization circuit, and then separates the bit data string into a predetermined format to the RAM 1.
6, the syndrome data is generated using the parity code, and error correction is performed by majority decision on the syndrome.

Reference numeral 17 denotes a processor CPU, which performs preset selection control of FM broadcasting, preset calling control of a multiplex broadcasting program, preset control of a multiplex broadcasting program to a preset memory, and other various processes based on FM multiplex broadcasting data. . Reference numeral 18 denotes a memory for storing a received FM multiplex broadcast program (text broadcast program, road traffic information program, etc.), and 19, a user performs a channel selection operation or a desired multiplex broadcast program (road traffic information, text broadcast, etc.). An operation unit for performing a call operation of a display processor;
1 is a display device for displaying a text broadcast program (news, weather forecast, etc.) and road traffic information on a screen, 22 is a display unit for displaying broadcast frequency and station name, 23 is a preset memory, and 23 is a preset memory for displaying a preset key and a selected frequency. The correspondence relationship (normal preset channel selection information) and the correspondence relationship between a preset key and a multiplex broadcast program (preset call information of a multiplex broadcast program) are stored.

The operation unit 19 is provided with various keys, P1 to P6 are preset keys, and BAND is AM / F.
A band selection key for selecting M, MPX is a multiplex mode key for setting a multiplex broadcast program reception mode, MENU is a menu key, and AUTO is an auto preset key for automatically storing correspondence between each preset key and a program number in the preset memory 23. , SI are service category selection keys for selecting a service category, M is a memory key, ↑ and ↓ keys are cursor shift keys, and SEEK is a seek key for frequency selection.

(B) Multiplexed broadcast program information Each data block of FM multiplex broadcast data (FIG. 2) contains broadcast program information such as teletext and traffic information. As shown in FIG. 4, each program can be identified by a service category Si, an information type (currently undefined), and a program number PNj. Service category Si is teletext (news, weather forecast, other service information),
It specifies traffic information, additional information, index information, etc., where text broadcasting is specified by Si = 1 or 2, traffic information is specified by Si = 4, additional information is specified by Si = D, and index information is specified by Si = E. You. Service category (Si =
Some information types for each (1, 2, 4) (currently undefined)
And 0 to 2 to specify the program for each information type.
55 key-in numbers KIN are assigned. The key-in number KIN = 0 is fixed as the number of the table of contents program. In the example of FIG. 4, KIN = 0 is the table of contents program, and KIN =
1 is a traffic information program of Tomei Expressway, KIN = 2 is a traffic information program of Tokyo Metropolitan Expressway, ..., KIN = 50 is a traffic information program of Setagaya area, KIN = 51 is a traffic information program of Yokohama area,
... and so on.

The table of contents program, as shown in FIG. 5, displays the correspondence between key-in numbers and program contents (program titles). PG1, PG2, PG3,... Are pages of the table of contents program, and are turned by scrolling. The key-in number KIN and the program number PNj (shown by numerals in parentheses for convenience of explanation, but are not actually displayed on the screen) correspond to 1: 1. This key-in number KI
The correspondence between N and the program number PNj can be recognized by referring to the selection control data unit SCDU sent together with the table of contents program information. FIG. 6 is an explanatory diagram of the selection control data unit SCDU, showing one key-in number. 51 is the key-in number KI
N and 52 are program numbers (destination program numbers), 53 is a page number (destination page number) to be displayed first, and 54 is an NPS (NPS =
0 indicates a jump within the same program, NPS = 1 indicates a jump within the same service category, and NPS = 2 indicates a jump to a different service category).

From the above, when the table of contents is displayed on the display screen and the key-in number of the program desired to be viewed is inputted by referring to the table of contents, the program number (destination program number) is obtained from the selection control data unit SCDU, and the program number Can display information on a predetermined page (a page specified by a destination page number) of a program specified by the user. As shown in FIG. 7, the additional information of Si = D is divided into segments 1 to F. For example, the broadcast company (business company number) of the currently receiving FM broadcast is specified by segment = 1, and segment = 8. Specifies the relay station list (relay frequency, relay station name) of the currently receiving FM broadcast station, and the segment = 10 shows the alternative broadcast station list (base station frequency, alternative station frequency) and the like of the FM broadcast station currently receiving. Is to be identified. Si = E
The index information is a list of programs transmitted multiplexed on the received FM broadcast signal. As shown in FIG. 8, all the program numbers of the service category are listed in correspondence with each service category. It has a configuration.

(C) Normal operation The processor 17 operates at the frequency F selected by the tuning operation.
Frequency data corresponding to the M station is input to the PLL circuit 5 to perform electronic tuning control. Thereby, the front end 4 inputs the intermediate frequency signal corresponding to the reception frequency to the intermediate frequency / FM detector 7. The intermediate frequency / FM detector 7 performs intermediate frequency amplification and FM detection on the input signal, and the noise canceller / stereo demodulation circuit 11 performs noise cancellation and demodulation of the stereo signal.

On the other hand, the filter circuit 12 extracts the L-MSK modulated signal component from the FM detection signal, and the L-MSK demodulation circuit 13 performs delayed detection on the L-MSK modulated signal to reproduce a bit clock, Demodulate the data sequence. The synchronization circuit 14 detects block synchronization and frame synchronization using the bit clock and the bit data string output from the L-MSK demodulation circuit 13, and the error detection and correction unit 15 receives the bit clock, the bit data string, and the synchronization signal. Then, the multiplexed broadcast data is input to the processor 17 by performing an error detection and correction process on the input data. The processor 17 stores the input multiplex broadcast data in the memory 18.
To memorize. In this state, the MPX key is used to set the multiplex broadcast reception mode, and thereafter, the service category Si
And the key-in number KIN (program number PNj), the processor 17 stores the data corresponding to the specified broadcast program in the memory 18 and then reads out the data from the memory and displays the data in the display processor 20. And develops it into an image and displays it on the display device 21.

(D) First of Preset Control of Multiplexed Broadcasting Program
FIG. 9 is a processing flow of a first embodiment of preset control of a multiplex broadcast program. After selecting the FM by operating the BAND key on the operation unit 19, a desired FM broadcast signal (FM frequency f ₁ ) is received by preset tuning or seeking (step 101). Then, operate the MPX key to
The M multiplex broadcast receiving mode is set (step 102). Thereby, the CPU 17 displays the multiplex broadcast program (for example, the table of contents program of the service mode received last) on the display device 21. Thereafter, the M key is operated to enter the memory mode (step 103). When the SI key is operated to select the service category Si, the CPU 17 displays the table of contents information of the selected service category on the display device 21 (step 104). ). While the table of contents program (FIG. 5) is displayed, a key-in number of a desired program is input, or a key-in number is designated by a cursor and input. The CPU 17 obtains the program number PNj corresponding to the input key-in number KIN with reference to the selection control data unit SCDU (FIG. 6), and obtains the program number PNj.
Is displayed on the display device 21 (step 105).

In this state, a predetermined preset key P1
When P6 is operated (step 106), the reception frequency f
_1. Corresponding to the service category Si, the operated preset key number Pi and the program number PNj of the displayed program are stored in the preset memory (step 10).
7). Thereafter, it is checked whether the preset has been completed (step 108), and if not, the preset operation from step 101 onward is repeated. By the above, to correspond to the preset key P1~P6 for each service category Si can preset the program number, the contents shown in FIG. 10 is preset with respect to the final one receive frequency f ₁ in the preset memory 23 . Similarly, other FM broadcast frequencies are preset.

In order to call a multiplex program in a preset state, a predetermined FM broadcast frequency fi is selected by preset selection or seek operation. Then, the mode is set to the multiplex broadcasting mode by the MPX key. Thereafter, the SI key is operated to select a desired service category Si, and finally, a predetermined preset key Pi is operated.
7 obtains the program number PNj corresponding to the tuning frequency fi, the service category Si, and the preset key Pi from the preset memory 23, receives the program information indicated by the program number PNj, and displays it on the display device 21. still,
In the above description, the contents shown in FIG. 10 are preset in the preset memory 23 corresponding to each FM broadcast frequency. However, the frequencies are not stored in the preset memory (only the portion A in FIG. 10 is stored), but the preset is common to all frequencies. It can also be configured to use content. In this way, the network station (for example, JFN) has the same program number even if the frequency is different, so that the same program can be continuously used (displayed) even if the tuning frequency is changed. Further, when displaying another multiplexed program, a desired program can be easily selected and displayed without opening a menu, so that safety in operation during driving of the car can be enhanced.

(E) Second preset control of multiplex broadcast program
Embodiment 2 FIG. 11 is a processing flow of a second embodiment of preset control of a multiplex broadcast program. After selecting the FM by operating the BAND key on the operation unit 19, a desired FM broadcast signal (FM frequency f ₁ ) is received by preset tuning or seeking (step 201). Next, the MPX key is operated to set the FM multiplex broadcast reception mode (step 202).
Thereby, the CPU 17 displays the multiplex broadcast program (for example, the table of contents program of the service mode received last) on the display device 21. Thereafter, the service category Si is selected by operating the SI key (step 20).
3). The CPU 17 receives the table of contents information of the selected service category, and displays the table of contents program (FIG. 5) on the display device 21 (step 204). When a key-in number is designated and input by a cursor or the like while the table of contents program is displayed, the CPU 17 selects a program number PNj corresponding to the designated key-in number KIN with reference to the selection control data unit SCDU (FIG. 6). Then, the program information indicated by the program information is displayed on the display device 21 (step 205).

In this state, the M key is operated to enter the memory mode (step 206), and the predetermined preset key P
When one of P1 to P6 is operated (step 207), the CPU 17
Stores the service category Si and the program number PNj in the preset memory in correspondence with the operated preset key number Pi (step 208). Thereafter, it is checked whether the preset has been completed (step 209). If not completed, the preset operation from step 203 is repeated. By the above, corresponding to each preset key P1~P6 the service category Si, program number PNj be preset, the content shown in finally FIG. 12, for example to one of the reception frequency f ₁ is preset in the preset memory 23 You. Similarly, other FM broadcast frequencies are also preset.

To call a multiplex program after presetting,
A predetermined FM broadcast frequency fi is selected by a preset channel selection or seek operation, and then a multiplex broadcast mode is set by an MPX key.
When i is operated, the CPU 17 obtains the tuning frequency fi, the service category Si and the program number PNj corresponding to the preset key Pi from the preset memory 23, and receives the program information indicated by the service category Si / program number PNj. To display on the display device 21. According to the above, a large number of (3)
(Around 0) Only a desired program is selected from a certain program, and even if Si = 1, 2, or 4, it can be mixed and preset at random. Then, the program information of the desired Si / program number PNj can be easily displayed on the display device by operating the preset key.

(F) Third Preset Control of Multiplexed Broadcasting Program
Third Embodiment FIG. 13 is a processing flow of a third embodiment of preset control of a multiplex broadcast program, and is an example in which a multiplex program is auto-preset by an auto preset function. BA on operation unit 19
After selecting the FM by operating the ND key, a desired FM broadcast signal (FM frequency f ₁ ) is received by preset tuning or seeking (step 301). Then MP
The X key is operated to set the FM multiplex broadcast reception mode (step 302). As a result, the CPU 17 displays the multiplex broadcast program (for example, the table of contents program of the service mode received last) on the display device 21 (step 30).
3). In this state, if the AUTO key is operated to indicate the auto preset, the CPU 17 sets the auto preset mode (step 304). Further, the CPU 17 receives the program index information (Si = E, see FIG. 8), and stores the program number in the memory 18 for each service category Si.
(Steps 305 to 306). FIG. 14A shows a state in which a program number is stored for each service category Si.

Thereafter, the CPU 17 sets the j-th (j =
1, 2, ...) corresponding to the preset keys Pj,
The j-th program number of each service category Si (1, 2, 4) is stored in the preset memory. For example, FIG. 14B shows program numbers PN ₁₁ , PN ₂₁ , and PN ₃₁ surrounded by a dotted frame in FIG. 14A corresponding to the preset key P1 together with the service category Si (= 1, 2, 4). Is stored in the preset memory 23 (step 307).
Incidentally, as is clear from FIG. 14, one preset key P
j, a plurality of combinations of the service category Si and the program number PNj are preset. When there are more programs in the service category than the number of preset keys, the programs are divided into groups corresponding to the number of keys, and two or more program numbers are assigned to one preset key for each service category.

As described above, the presetting of the multiplex broadcast program of the FM broadcast signal being received is completed. Thereafter, the above-described processing is repeated while changing the reception frequency. To call a multiplex program after the preset, a predetermined FM broadcast frequency fi is selected by a preset tuning or seek operation, and then the
The PX key is used to switch to the multiplex broadcast mode. Thereafter, the preset key Pi is used to select a combination of a predetermined service category Si and a program number PNj. Note that a plurality of combinations of the service category Si and the program number PNj (Si / PNj) are preset in one preset key. Therefore, every time the preset key is operated, the first combination → the second combination → 3rd combination → 1st combination → ...
・ Select a predetermined combination in a toggle format.
When the combination (Si / PNj) of the service category Si and the program number PNj is selected by the preset key, C
The PU 17 receives and displays the program information corresponding to the combination. As described above, in the third embodiment, the multiplex program corresponding to the preset key can be displayed on the display screen by operating the preset key, and the preset can be easily and quickly performed by operating the auto preset key. it can.

(G) Fourth Preset Control for Multiplexed Broadcast Programs
Embodiment FIG. 15 is a flowchart of a fourth embodiment of the preset control of a multiplex broadcast program, which is another example in which a multiplex program is auto-preset by an auto-preset function. After selecting the FM by operating the BAND key on the operation unit 19, a desired FM broadcast signal (FM) is selected by preset tuning or seeking.
The frequency f ₁ ) is received (step 401). Then
The MPX key is operated to set the FM multiplex broadcast reception mode (step 402). As a result, the CPU 17 displays the multiplex broadcast program (for example, the table of contents program of the service mode received last) on the display device 21 (step 403).

After that, the auto preset key AUTO
Is operated to indicate the auto preset, the CPU 17
Sets the auto preset mode (step 404).
Next, when the service category Si is selected by operating the SI key (step 405), the CPU 17 receives the table of contents program of the service category Si and the selection control data unit SCDU (FIG. 6), and displays the table of contents program (FIG. 5). It is displayed on the device 21 (step 406). Next, when the MENU key is operated, the CPU 17 stores the header text HD and the body data BY of the table of contents program in the menu area of the memory 18 (step 407). CPU 17
Determines the program numbers corresponding to the key-in numbers 1 to 6 of the service category Si using the selection control data unit SCDU, and stores these program numbers in the preset memory 23 in correspondence with the preset keys P1 to P6 (see FIG. 16). , Step 408). If there are more programs in the service category than the number of preset keys, the programs are divided into groups corresponding to the number of keys, and a plurality of program numbers are assigned to one preset key.

Thereafter, if another service service category is selected using the SI key and the same processing is performed, a multiplex program number can be preset in correspondence with the preset key for each service category. In this way, the preset can be performed in a short time by a simple operation. Unlike the case of the third embodiment, a program that is not related to an information program such as a table of contents program and a program common macro is not preset, and only a program effective as an information program can be preset.

To call a multiplex program after presetting,
If a predetermined FM broadcast frequency fi is selected by a preset channel selection or seek operation, then the multiplex broadcast mode is set by the MPX key, then a service category is selected by the SI key, and the predetermined preset key Pi is operated. The CPU 17 obtains the program number PNj corresponding to the tuning frequency fi, the service category Si, and the preset key Pi from the preset memory 23, receives the program information indicated by the service category Si / program number PNj, and displays the program information on the display device 21. . As another calling method, a menu key (menu key) is operated to call a table of contents screen of a desired service category from a menu area and displayed on a display device. Then, a key-in number of a desired program is set by a preset key. The program information can be input and displayed. As described above, the present invention has been described with reference to the embodiments. However, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.

[0036]

As described above, according to the present invention, for each service category in each FM multiplex broadcast, a program number is stored in a preset memory in correspondence with a preset key.
When a predetermined preset key is operated, a program number corresponding to the operated preset key is obtained from a preset memory, and an image indicated by the program number is displayed on a display device. By operation, a multiplex program corresponding to the preset key can be displayed on the display screen. According to the present invention, the service category and the program number are stored in the preset memory in association with each preset key for each FM multiplex broadcast, and when a predetermined preset key is operated at the time of receiving a predetermined FM broadcast, A service category and a program number corresponding to the operated preset key are obtained from a preset memory,
Since an image corresponding to the program information indicated by the service category and the program number is displayed on the display device, a predetermined multiplex program can be displayed on the display screen by operating the preset key, and the service category Si is selected. A desired program can be displayed simply by operating the preset key without having to do so.

Further, according to the present invention, when the auto preset key is operated at the time of receiving a predetermined FM broadcast, the program index data multiplexed and transmitted to the FM broadcast signal is demodulated and based on the program index data. And j-th (j = 1,
The j-th program number of each service category is stored in the preset memory in correspondence with the preset key of (2,...), And when the preset key is operated when receiving a predetermined frequency, the j-th program number is stored in correspondence with the preset key. Since the program information indicated by the predetermined combination of the service category and the program number stored in the preset memory is configured to be displayed on the display screen, a predetermined multiplex program can be displayed on the display screen by operating the preset key, and The preset can be performed easily and in a short time by operating the auto preset key.

According to the present invention, in the auto preset mode in which the auto preset key is operated at the time of receiving a predetermined FM broadcast, the contents information of the service category selected by the service category selection key is demodulated, and
The j-th program of the service category is stored in the preset memory in correspondence with the (k = 1, 2,...) Preset key, and when a predetermined FM broadcast is received, the service category is selected and then the predetermined program is selected. When the preset key is operated, the program information indicated by the program number stored in the preset memory corresponding to the preset key is displayed on the display screen. Can be displayed on the display screen, and the preset can be performed easily and in a short time by operating the auto preset key.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an FM multiplex broadcast receiver of the present invention.

FIG. 2 is a configuration diagram of FM multiplexed data.

FIG. 3 is an explanatory diagram of a pattern of a block identification code.

FIG. 4 is an explanatory diagram of multiplex broadcast program information.

FIG. 5 is an explanatory diagram of a table of contents program.

FIG. 6 is an explanatory diagram of a selection control data unit.

FIG. 7 is an explanatory diagram of additional information.

FIG. 8 is a configuration diagram of index information.

FIG. 9 is a flowchart of a preset operation of the first embodiment.

FIG. 10 is an explanatory diagram of storage contents of a preset memory.

FIG. 11 is a flowchart of a preset operation of the second embodiment.

FIG. 12 is an explanatory diagram of storage contents of a preset memory.

FIG. 13 is a flowchart illustrating a preset operation according to the third embodiment.

FIG. 14 is an explanatory diagram of an auto preset.

FIG. 15 is a flowchart of a preset operation of the fourth embodiment.

FIG. 16 is an explanatory diagram of storage contents of a preset memory.

[Explanation of symbols]

 17, CPU 19, operation unit 21, display device 23, preset memory P1 to P6, preset key MPX, multiple mode key AUTO, auto preset key SI, service category selection key

Claims (4)

(57) [Claims] 1. An FM multiplex broadcasting receiver for separating and demodulating FM multiplex program information specified by at least a service category number and a program number from an FM signal and displaying the same on a display screen, wherein a preset key and a service category selection key are used. An operation unit provided, a preset memory for storing a program number corresponding to a preset key for each service category in each FM multiplex broadcast, a display device for displaying an image corresponding to the FM multiplex program, and when receiving a predetermined FM broadcast When a predetermined preset key is operated after selecting a service category, a program number corresponding to the operated preset key is obtained from a preset memory, and a control unit for displaying an image indicated by the program number on a display device is provided. Multiplex broadcast program preset function The FM multiplex broadcasting receiver. 2. An FM multiplex broadcast receiver for separating and demodulating FM multiplex program information specified by at least a service category number and a program number from an FM signal and displaying the same on a display screen, wherein a plurality of preset keys and a service category are selected. An operation unit having keys, a preset memory for storing a service category and a program number corresponding to each preset key for each FM multiplex broadcast, a display device for displaying an image corresponding to the FM multiplex program, and a predetermined FM broadcast reception When a predetermined preset key is operated, a service category and a program number corresponding to the operated preset key are obtained from a preset memory, and an image corresponding to the program information indicated by the service category and the program number is displayed on the display device. Characterized by having a control unit for displaying FM multiplex broadcasting receiver having multiple broadcast programs preset function. 3. An FM multiplex broadcast receiver for separating and demodulating FM multiplex program information specified by at least a service category number and a program number from an FM signal and displaying the same on a display screen, comprising: a plurality of preset keys; An operation unit having a selection key, an auto preset key for automatically presetting a program number corresponding to each preset key, and a service category and a program number corresponding to each preset key for each FM multiplex broadcast. A preset memory for storing a plurality of combinations; when an auto-preset key is operated during reception of a predetermined FM broadcast, program index data multiplexed and sent to an FM broadcast signal is demodulated, and based on the program index data, Each service category is associated with the j-th (j = 1, 2,...) Preset key. Registration means for storing the j-th program number of the program in a preset memory; and service category and program stored in the preset memory corresponding to the preset key when a preset key is operated during reception of a predetermined FM broadcast. An FM multiplex broadcast receiver having a multiplex broadcast program preset function, comprising: a control unit for displaying, on a display screen, program information designated by a predetermined combination among a plurality of combinations of numbers. 4. An FM multiplex broadcast receiver for separating and demodulating FM multiplex program information specified by at least a service category number and a program number from an FM signal and displaying the same on a display screen, comprising: a plurality of preset keys; An operation unit equipped with a selection key, an auto preset key for automatically presetting a program number corresponding to each preset key for each service category, and a corresponding preset key for each service category in each FM multiplex broadcast In a preset memory for storing a program number, and in an auto preset mode in which an auto preset key is operated at the time of receiving a predetermined FM broadcast, the table of contents information of the service category selected by the service category selection key is demodulated, and the j-th (j = 1, 2, ...) presets Registering means for storing a j-th program of the service category in a preset memory in association with the key; when receiving a predetermined FM broadcast, selecting a service category and operating the preset key when the predetermined preset key is operated; An FM multiplex broadcast receiver having a multiplex broadcast program preset function, comprising: a control unit for displaying, on a display screen, program information indicated by a program number stored in a preset memory corresponding to the above.