KR19990022902A - Broadcast system and method - Google Patents

Abstract

The FM broadcasting station 5 broadcasts an information type identification (ID) indicating the type of program information during broadcasting in a subframe period previously allocated to the FM radio receivers 1b-1d. Each receiver 1b-1d receives the information type ID broadcasted by the FM broadcasting station 5 by performing intermittent reception in the subframe period allocated to it. When the received information type ID matches the desired information type ID registered by the user in the input data memory of the FM radio receiver 1b-1d, the FM radio receiver 1b-1d cancels the intermittent reception, and the matched In accordance with the information type ID, processing such as reception and storage of program information, reception and display of program information, or notification processing is executed.

Description

Broadcast system and method thereof.

There is an available service for broadcasting FM radio waves that convey display information consisting of multiplexed letters, numbers, etc. for voice information and displaying the display information on the display device of the receiver. This service, called FM teletext broadcasting, has already been proposed for practical use as visual information propagation.

In accordance with this FM teletext broadcast, FM broadcast waves obtained by frequency multiplexing display information consisting of letters, numbers, and the like with respect to voice information are transmitted from an FM broadcast station. An FM radio receiver having a display device receives an FM broadcast signal, separates voice information from the display information, and displays characters corresponding to the character code included in the display information on a display device such as a liquid crystal display device. Therefore, the user can view information such as weather information or traffic information (hereinafter referred to as program information) provided by the teletext broadcasting (display information) program on the display device. In more detail, the user can view the desired program information from the plurality of program information by selecting the desired program from the program menu displayed on the display device.

Some program information that the user wants to see may not be broadcast often but only during a designated period. When the user wants to view program information that is broadcast only during the designated period, the user must perform one of the following two operations, for example. First, the user checks a given program table in a magazine or the like, and operates an FM radio receiver that receives program information and displays it on a display device when a broadcast time for desired program information arrives. Alternatively, the FM radio receiver is set to always have power to store program information in the FM radio receiver, and then display desired program information among a plurality of types of program information stored in the FM radio receiver to view the program information.

However, the first method requires latency because of the operation of the FM radio receiver, so that the user cannot see the desired program information immediately. Another disadvantage is that the program information cannot be received because the user can forget the broadcast time of the desired program information. In addition, at the broadcast time of the desired program information, the user may not be close to this to operate the FM radio receiver, or may be at a place where the FM broadcast wave cannot reach. In this case, the user cannot receive the desired program information. In the second method, the FM radio receiver must always be turned on, resulting in a large power loss. In addition, this method requires the storage of all program information, not just the desired program information, thus requiring a large amount of memory in the FM radio receiver.

The present invention relates to a broadcasting apparatus, a broadcasting receiving apparatus, and a method of using the broadcasting system. The invention is particularly suitable for use in, but not limited to, FM (frequency modulation) teletext broadcasting systems.

1 shows a comprehensive structure of an FM teletext broadcasting system according to the above embodiment of the present invention.

2 is a block diagram showing the circuit structure of the FM radio receiver according to this embodiment.

Fig. 3 is stored in the EEPROM in Fig. 2 and shows information type IDs and contents associated with these information type IDs.

4 shows a circuit structure of a broadcasting apparatus provided to an FM broadcasting station according to this embodiment.

Fig. 5 shows the structure of a frame in the transmission format of FM teletext broadcast according to this embodiment.

6 shows how frame data is divided into a plurality of subframes in the transmission format of FM teletext broadcasting according to this embodiment.

Fig. 7 shows the relationship between the number of subframe packets and the lower 4 bit IDs according to this embodiment.

8 shows a bit pattern of the block identification code according to this embodiment.

9A shows a schematic structure of a data packet in the transmission format of FM teletext broadcast according to this embodiment.

9B shows the structure of the prefix in the transmission format of the FM teletext broadcast according to this embodiment.

Fig. 10 shows the structure of a data group in the case of paging data according to this embodiment.

11 shows a structure of scrambled information constituting a segment according to this embodiment.

12 shows a structure of alternative frequency information constituting a segment according to this embodiment.

Fig. 13 shows the structure of paging information (paging data) constituting a segment according to this embodiment.

Fig. 14 shows a data structure when paging data is data for an information type according to this embodiment.

15 shows a code for an operation mode of a receiver and contents associated with this operation mode.

Fig. 16 shows a data structure when the data group is program management data or paging data according to this embodiment.

17 shows the structure of program data according to this embodiment.

18A and 18B show the structure of program management data according to this embodiment.

19A and 19B show the structure of page data according to this embodiment.

20 is a flowchart for explaining the operation of the FM radio receiver according to this embodiment.

21 is a flowchart for explaining the operation of the FM radio receiver according to this embodiment.

22 is a flowchart for explaining the operation of the FM radio receiver according to this embodiment.

23A to 23E are timing charts for explaining the operation of the FM radio receiver according to this embodiment.

FIG. 24 shows the information content of information type IDs and receiver operating modes, correlated to each other in the input data memory in FIG. 2 according to another embodiment.

25A illustrates a program category number, a program category name, and a program index number and program index name corresponding to the program category according to another embodiment of the present invention.

FIG. 25B shows a program index number and a program index number corresponding to a program category name according to this embodiment.

Fig. 26 shows the structure of an informational data group according to this embodiment.

27 shows data unit data according to this embodiment.

28 to 31 are flowcharts for explaining processing performed in the FM radio receiver according to this embodiment.

32A and 32B are timing charts showing the operation of the FM radio receiver according to this embodiment.

Explanation of symbols for main parts of the drawings

1a-1d: FM radio receiver 2: telephone 3: telephone network

4: service center 5: FM station 10: myro computer

11, 37: antenna 12: receiving section 13: audio information reproducing section

14: multiplexed information reproducing section 15: CPU 16: alarm section

17: display unit 18: key input unit 19: ROM card

20: EEPROM 21: Received data memory 22: Fixed message memory

23: input data memory 24: transfer buffer 25: DTMF signal generator

31: transmission unit 32: multiplexed data processing unit 33: transmission processing unit

Accordingly, an object of the present invention is to provide a broadcasting apparatus, a broadcasting receiving apparatus, and a method of using the same, which is a broadcasting system capable of reliably and easily receiving desired program information with less power consumption and a smaller memory capacity.

To achieve this object, according to a preferred mode of the present invention, there is provided a broadcasting system including a broadcasting apparatus for broadcasting a plurality of types of program information and a broadcasting receiver apparatus for receiving and displaying program information broadcasted by the broadcasting apparatus. do. The broadcasting apparatus includes: first broadcasting means for broadcasting a plurality of types of program information; And second broadcasting means for broadcasting first information type data indicating a kind of on-the-air program information among a plurality of types of program information to be broadcast. Each broadcast receiving apparatus includes receiving means for receiving a plurality of types of program information and first information type data; Information type data setting means for setting second information type data; Comparison means for comparing the first information type data received by the receiving means with the second information type data set by the information type data setting means; And control means for executing a process for program information associated with the matched information type data when the comparison by the comparison means is matched. With such a broadcast system, each broadcast receiving device provides a broadcast service that can easily obtain desired program information.

According to still another preferred mode of the present invention, there is provided a broadcasting system including a broadcasting apparatus for broadcasting a plurality of types of programs and a broadcasting receiving apparatus for receiving and displaying a program broadcasted by the broadcasting apparatus. The broadcasting apparatus includes first broadcasting means for broadcasting a plurality of programs; And second broadcasting means for broadcasting first program identification data for instructing broadcasting among a plurality of programs broadcast for a predetermined period previously allocated to a broadcast receiving apparatus for receiving broadcast program information. Each broadcast receiving apparatus includes: receiving means for receiving first program identification data broadcast by the second broadcasting means with intermittent reception for performing reception in a predetermined period previously allocated to each broadcast receiving apparatus; Program identification data setting means for setting second program identification data; Comparison means for comparing first program identification data received by the reception means with second program identification data set by the program identification data setting means; And control means for performing processing on program information according to the matched program identification data when the comparison by the comparison means is matched. With this broadcast system, each broadcast receiver provides a broadcast service that can reliably obtain desired program information.

Hereinafter, an embodiment of the present invention applied to an FM teletext broadcasting system will be described with reference to the accompanying drawings.

1 shows a general structure of an FM teletext broadcasting system. In this figure, reference numeral 1a denotes an FM radio receiver which tries to prevent paging. The FM radio receiver 1a has an auto dial function in addition to an optional paging data reception function. When the user presses the speaker of the FM radio receiver 1a on the telephone (2) handset and sends a DTMF (Dual Tone Multi Frequency) signal from the speaker according to the paging number and message data previously input, the paging number and message data are included. Paging data is sent to the service center through the telephone network (3).

The user can also make a paging request by dialing the service center 4 and saying the paging number and the message data.

The service center 4 transmits the paging data sent from the FM radio receiver 1a via the telephone network 3 together with the paging data sent from another receiver to the FM broadcasting station 5 in charge of broadcasting such paging data. The FM broadcast station 5 transmits FM broadcast waves having paging data multiplexed as display information for voice information.

The FM broadcast waves transmitted from the FM broadcast station 5 are received by the FM radio receivers 1b to 1d located in the broadcast area of the FM broadcast station 5 (where the FM broadcast waves can reach). Upon determining that the paging number at is matched to its paging number, each FM radio receiver 1b-1d informs the user that it is being paged.

2 shows a circuit structure of each FM radio receiver 1a to 1d. In this figure, the receiver 12 is connected to the antenna 11. This receiver 12 has an FM tuner 121 and an FM demodulator 122. The FM tuner 121 tunes the frequency of the FM radio wave received at the antenna 11. The FM demodulator 122 demodulates the FM signal tuned by the FM tuner 121 to generate a stereo signal (L + R signal and L-R signal). The switch 123 is used to allow or prohibit power to the receiver 12.

The audio information reproducing unit 13 is connected to the FM demodulator 122 of the receiving unit 12. This audio information reproducing section 13 includes a stereo demodulator 131 and amplifiers 132 and 133. The stereo demodulator 131 demodulates a stereo signal which is a signal demodulated by the FM demodulator 122 to generate an L signal and an R signal. The L and R signals are sent from the amplifiers 132 and 133 to the speakers 135 and 136 and output in stereo sound. The switch 134 is used to allow or prohibit power to the voice information reproducing unit 13.

The multiplexing information reproducing section 14 has a level controlled minimum shift keying (L-MSK) demodulator 141, an error correction decoder 142, and a block identification code detector 143. The L-MSK demodulator 141 undergoes digital modulation that changes the multiplexing level by 4% to 10% according to the level of the L-R signal, and separates and demodulates the multiplexed signal (signal of the display information) for the audio signal. The error correction decoder 142 performs error correction on the display information based on the CRC and parity (to be described later). The error correction decoder 142 sends the display information demodulated by the L-MSK demodulator 141 to the CPU (central processing unit) 15. The block identification code detector 143 detects the block identification code in the transmission form of the display information. This is explained later. The block identification code 143 sends the detected block identification code to the CPU 15. The switch 144 is used to allow or prohibit power to the multiplexed information receiver 14.

Microcomputer 10, alarm unit 16, display unit 17, key input unit 18, ROM (Read Only Memory) card 19, EEPROM (electrically erasable PROM) 20 receive data memory 21 The fixed message memory 22, the input data memory 23 and the transfer buffer 24 are connected to the CPU 15.

The microcomputer 10 switches the tuning frequency of the FM tuner 121 according to the channel selection mode performed through the key input unit 18. The alarm unit 16 informs the user that the FM radio receiver 1a, 1b, 1c, or 1d is paged to a driver not shown. The display unit 17 is composed of letters and / or numbers and displays a message sent as display information. The key input unit 18 includes various types of keys. When a key on the key input unit 18 is input, an associated key-in signal is sent to the CPU 15.

The ROM card 19 stores the processing program for the CPU 15 and the paging number of the FM radio receiver. The ROM card 19 is composed of a recording medium such as a magnetic or optical recording medium or a semiconductor memory. The ROM card 19 may be detachably attached to the body of the associated FM radio receiver 1b, 1c, or 1d. A ROM which can replace the ROM card 19 may be permanently installed in the FM radio receiver 1b, 1c, or 1d. Programs, data, and the like, recorded on the recording medium may be received via a communication line or the like from another device connected to the FM radio receiver 1a (1b, 1c, or 1d). Alternatively, the storage device having the above-described recording medium may be provided to another device connected to the FM radio receiver 1a (1b, 1c, or 1d) via the same communication line, so as to record on such a recording medium. The programmed programs and data can be used using a communication line.

The EEPROM 20 stores data on error correction of the display information received by the error correction decoder 142. The EEPROM 20 also stores a table having the information type IDs shown in Fig. 3 and the program information types corresponding to the information type IDs. (These types are referred to as information types hereinafter.)

In FIG. 3, the information types shown in the table can be displayed on the display unit 17 in the form of a list by operating a predetermined key on the key input unit 18. FIG. As the user selects any one of the information types displayed on the display unit 17 through a predetermined key operation, an information type ID corresponding to the information type can be registered in the input data memory 23.

The table shown in Fig. 3 can be registered in the EEPROM 20 before sending (shipping) the FM radio receivers 1a-1d. Alternatively, the table shown in FIG. 3 can be broadcast so that each FM radio receiver 1a-1d receives this table and registers with the EEPROM 20. Furthermore, the table shown in FIG. 3 can be registered in the ROM card 19. FIG.

The reception data memory 21 stores the received display information. The received data memory 21 includes an area for storing message data associated with paging, a temporary storage area for storing the latest program data, and program information corresponding to an information type ID identical to the information type ID. Having the selected program information storage area, when this information type ID is received, it can be selectively registered in the input data memory 23 by the process described later.

The fixed message memory 22 stores the fixed message jointly with the fixed message number.

The input data memory 23 stores paging numbers of destinations input by the key operation of the key input unit 18, and stores message data such as fixed message numbers in addition to the selected information type ID described above.

The transfer buffer 24 temporarily stores a paging number and a message selected from data input by a key operation on the key input unit 18 or stored data in the input data memory 23. The transfer buffer 24 sends these temporarily stored data to the DTMF signal generator 25. The generated DTMF signal generates a DTMF signal corresponding to the signal sent from the transmission buffer 25. The generated DTMF signal is sent to the speaker 27 through the amplifier 26 and output.

The CPU 15 performs comprehensive control of the circuit described above in accordance with the processing program stored in the ROM card 19.

4 shows the structure of a broadcasting apparatus provided to the FM broadcasting station 5. This broadcast apparatus includes a transmitter 31, a multiplexed data processor 32, and a transmitter 33.

The transmission processor 33 sends information such as program information and paging information to the multiplexed data processor 32. The multiplexed data processor 32 includes an encoder 38, a multiplexer 39, an error correction adder 40, and an L-MSK modulator 41. The encoding unit 38 encodes the information supplied from the transmission processing unit 33. The multiplexer 39 separates the information encoded by the encoder 38 into frames and blocks of a transmission format (described later) in order to transmit the information as FM teletext broadcast information. The error correction adding device 40 adds an error correction code (parity and cyclic redundancy code) to the information separated by the multiplexer 39. The L-MSK modulator 41 applies L- to the information having the error correction code added by the error correction adding device 40 such that the level of the multiplexed signal varies by 4% to 10% according to the modulation level of the LR signal. Perform MSK modulation.

The transmitter 31 includes a stereo modulator 34, an FM modulator 35, a transmitter 36, and an antenna 37. The stereo modulator 34 performs stereo modulation on the voice information consisting of the L signal and the R signal to generate a stereo signal consisting of the L + R signal and the L-R signal. The stereo modulator 34 frequency modulates the L + R signal, the L-R signal, and the multiplexed signal output from the L-MSK modulator 41. The FM modulator 35 performs FM modulation on the output signal of the stereo modulator 34 to output a signal. The transmitter 36 emits the FM signal output from the FM modulator 35 from the antenna 37 as an FM broadcast wave.

FIG. 5 shows one frame structure of the multiplexed signal (signal of the display information) transmitted from the FM broadcast station 5. One frame consists of 272 blocks, each with a 16-bit block identification code (BIC) added to the head of each block to establish block synchronization and frame synchronization.

Of the 272 blocks, 190 blocks are used as data packets for transmitting data such as information type ID and program data, and the remaining 82 blocks are used as parity packets for transmitting parity in the column direction (vertical parity). The 82 parity packet indicates the vertical parity of the entire data and is divided as shown in FIG. 5 to overcome the burst error.

In this embodiment, 16 subframes are set to a single frame for the selective paging service as shown in FIG. In this case, the parity packet up to packet number 136 is the first half of the frame. A data packet contained in packet numbers 3 to 13 and having a block identification code of BIC1 is set to subframe 0, and a data packet containing packet numbers 14 to 29 and of a block identification code of BIC3 is set to subframe 1, and similarly, a packet Data packets included in numbers 113 to 128 and whose block identification code is BIC3 are set to subframe 7.

Packet number 137 and subsequent data packets are treated as the latter half of the frame. A data packet contained in packet numbers 139 to 149 and a block identification code BIC2 is set to subframe 8, and a data packet contained in packet numbers 150 to 165 and a block identification code BIC3 is set to subframe 9, similarly Data packets included in numbers 249 to 264 and whose block identification code is BIC3 are set to subframe 15.

Each subframe number 0 to 15 corresponds to a paging ID code (28-bit structure) given to each of the above-described FM radio receivers 1a-1d or data of lower 4 bits (lower 4th to 1st bits) in the paging number. do. In other words, each FM radio receiver 1a, 1b, 1c, or 1d belongs to any one of 16 groups separated based on the lower 4 bits of data in their ID code. Each FM radio receiver 1a, 1b, 1c, or 1d is designed to intermittently receive a subframe corresponding to a group to which it substantially belongs. 7 shows the relationship between the packet number for subframe numbers 0 to 15 and the lower 4 bits of the ID code. The bit pattern of the 16-bit block identification code at the head of each block is shown in FIG. The FM radio receivers 1a-1d can identify the timing of switching packets by detecting the block identification codes BIC1 to BIC4. The FM radio receivers 1a-1d may identify the start timing of the frame based on the change in the block identification code.

In the case of side information such as paging information, as shown in Fig. 9A, each data packet constituting each subframe has a total of 176 bits, that is, 16 bits of prefix and 160 bits of data block, and 14 bits of CRC. It consists of 82 bits of parity.

As shown in Fig. 9B, each 16-bit prefix consists of a 4-bit service ID code, a 1-bit decoding flag, a 1-bit information end flag, a 2-bit update flag, a 4-bit data group number, and a 4-bit data packet number. do.

The 4-bit service ID code located at the head of each prefix is used to identify the data content of the data packet. When the service ID code is 11, this indicates that the data packet carries paging information. When the service ID code is 1100, 100, 1100, 10, 1010, or 110, this indicates that the data packet carries program data such as text, pictures or traffic information.

The 1-bit decoding ID flag indicates an error correction method performed by the error correction decoder 142. When the decoding ID flag is 1, the error correction decoder 142 in the FM radio receiver 1a, 1b, 1c, or 1d performs error correction only in the horizontal direction and sends data for the data packet to the CPU 15. send. When the decoding ID flag is 0, the error correction decoder 142 in each of the FM radio receivers 1a-1d performs error correction in both the horizontal and vertical directions and sends data for the data packet to the CPU 15. send. In the exclusive propagation paging mode, the decoding ID flag is 1 since each FM radio receiver 1a-1d intermittently receives only the subframes assigned to it. The 1-bit information end flag is set to 1 when the information ends in the data group transmitted with the given data group number, otherwise it is set to 0. The 2-bit update flag is incremented by one when the data content in the data group transmitted with the given data group number is updated.

The 4-bit data group number indicates the data group number assigned when the data group is transmitted. The lower 4 bits of the paging ID code are set to the 4-bit data group number when the service ID code is 11. Thus, the number of frame blocks to be transmitted is determined for each data group number to ensure intermittent reception saving battery power. The 4-bit data packet number indicates the number of data packets sent for each data group. Data packet numbers are arranged sequentially from 0.

Each data group consists of one or more 160-bit data blocks. In the case of paging data, the data group is composed of segment 1 (scramble information), segment 2 (alternative frequency information), and segment 3 (paging information), as shown in FIG. Null is the data inserted at the excess that adjusts the length of the data group. Not all information in all segments 1-3 needs to be sent. The information in segments 1 and 2 has a long transmission interval.

Segment 1 (scramble information) is composed of a 4-bit segment ID, a 4-bit number of segment data bytes, a 2-byte paging provider number, and a 2-byte scramble flag, as shown in FIG. In this case, the segment ID is set to 1 indicating scramble information. The number of segment data bytes is fixed at 100 (4 in decimal). The paging supply number is a flag for distinguishing a paging provider. The scramble flag is information necessary for descrambling.

As shown in Fig. 12, segment 2 (alternative frequency information) is a 4-bit segment ID, the number of segment data bytes consisting of 4 bits (or 4 bits + 1 byte), 1 byte broadcast station frequency, and N byte replacement. Frequency (first through Nth). In this case, the segment ID is set to 1010 indicating alternative frequency information. When the number of segment data bytes is equal to or more than 15, the 4-bit area of the segment data byte number area is set to 1111, and the data indicating the number of segment data bytes is set in the next one byte area. There is M segment 2.

As shown in Fig. 13, segment 3 (paging information) includes a 4-bit segment ID, the number of segment data bytes composed of 4 bits (or 4 bits + 1 byte), 2-byte ID group identification flag, 2-bit ID code ( MID), 6-bit data for the number of paging, and a personal ID group. The segment data byte number is represented by only 4 bits until its value is 14. When the number of segment data bytes is equal to or greater than 15, the first 4-bit area of the field of number of segment data bytes is set to 1111 and the data indicating the number of segment data bytes is set in the next one-byte area. do.

The ID group identification flag is composed of 16 bit flag data. The FM radio receivers 1a-1d are divided into 16 groups based on the lower 4 bits of the ID code. Each group of each FM radio receiver is further divided into 16 subgroups based on the lower eighth to fifteenth bits of the ID code. The ID group identification flag data indicates that when one of its 16 bits is 1, one of the FM radio receivers 1a-1d belonging to the group designated by 1 bit is paged. For example, b5 (upper byte) = 1 indicates that any one of the FM radio receivers 1a-1d having an ID code whose lower eighth to fifth bits are 101 (5 in decimal) is paged.

When the ID code MID is 0 (0 in decimal) or 1 (1 in decimal), this indicates that the personal ID is recorded in segment 3. The number of paging N indicates the number of the FM radio receivers 1a-1d that are individually paged. The personal ID group is the first to Nth paging, each consisting of one upper 24 bits (28th to 5th bits) first to Nth paging data allocated among the personal IDs of the paged FM radio receivers 1a-1d. It consists of data.

When the ID code MID is 0, a personal ID without a message, described later, is recorded in the personal ID group. In this case, as shown in Fig. 13, as each first to Nth paging data, the paging number N and the upper 24 bits (28th to 5th bits) of the personal ID are recorded after the ID code MID. When the ID code MID is 1, the personal ID having a message, described later, is recorded in the personal ID group. In this case, as shown in Fig. 13, the paging number M of the personal ID, the first to Mth paging data and the message data group are recorded after the ID code MID. Data indicating the character type and the length of the message data is added to the head of each message data. When the value of the character type consisting of 2 bits is 0, the message data is numeric data consisting of 4 bits per character. When the character type value is 10, the message data is alphabet data consisting of one byte per character.

When the ID code MID is 10 (2 in decimal), segment 3 includes an information type data group indicating the type of program in broadcasting. In this case, the bits of the ID group wall flag are all ones. In this case, as shown in Fig. 14, the number N of information type data and the first to Nth information type data follow the ID code MID. The information type data is composed of an information type ID, a number of selection control data, and selection control data, and includes a destination page number indicating a program including an information type ID and information indicated by a page, and a destination program number ( Only when transmission is required). Two-bit control data for specifying an operation mode of the associative receiver is added to the head of the selection control data. As shown in Fig. 15, control data having a value of 0 (zero in binary) is stored in the reception data memory 21 when program data corresponding to the information type ID registered in the input data memory 23 is received. Indicates a mode for performing only program data storage in the selected program data storage area, control data having a value of 1 (binary 1) indicates a mode for storing program data, and indicates that desired program data is received. 16), the control data having a value of 2 (10 in binary) is similarly informed of the program data to the temporary storage area in the received data memory 21 and temporarily displayed on the display unit 17. The control data with a value of 3 (11 in binary) indicates the mode in which only the mentioned notifications are generated. Data may be selected and broadcast as required by the FM broadcasting station 5, for example the control data may be changed according to the program type, or may be fixed to a specific control of data.

One segment 3 (paging information) may include a plurality of ID code MIDs.

In the case of program data for transmitting program information, each data packet is composed of a total of 176 bits of prefix 32 bits, a data block of 144 bits, and a CRC 14 bits and a parity 82 bits. Since the prefix for the program data has the same structure as the prefix for the paging data except for the difference in the number of bits, this structure is not described in detail.

Each data group consists of one or more 144-bit data blocks. The data group consists of a heading start code, a data group header, program management data or page data, and a data end code. The heading start code and data group end code consist of 8 bits each. Null is the data inserted at the excess that adjusts the length of the data group.

17 shows a structure of program data composed of the above-described program management data and one or a plurality of page data.

The program management data is composed of a program data header as a data header and a data unit group as a data unit group.

The page data is composed of a page data header as a header of the page data and a group of data units.

Fig. 18A shows the structure of a program data header consisting of a 2-byte data header ID and 4-byte data header data. The data header ID consists of an 8-bit information separation code (RS) and an 8-bit data head parameter. Data header data includes an 8-bit program number, a 2-bit update flag indicating an update for each program, 6-bit data for the total number of pages constituting the program, and an 8-bit presentation function indicating the type of code included in the program. Data, 4-bit information category data for identifying information categories of program contents, and 4-bit display format data for specifying a display mode.

18B shows the structure of each data unit constituting the data unit group. The data unit includes a data unit ID consisting of an 8-bit data unit separation code (US) and an 8-bit data unit parameter. The data unit further includes a data unit link flag (DUL) indicating a link of data units, a 15-bit data unit size indicating a byte length of data unit data, and a maximum of 32,767 bytes of data unit data.

Fig. 19A is composed of 2-byte data header ID and 5-byte data header data. The data header ID consists of an 8-bit information separation code (RS) and an 8-bit data header parameter. Data header data includes an 8-bit program number, a 2-bit update flag that indicates the update of the content for each page, a 6-bit page number for the program, 8-bit presentation function data indicating the code type included in the page, and information about the page content. 4-bit information category data for indicating the category, 4-bit display format data for specifying the display mode, 4-bit raster color data for indicating the raster color of the header display area by the lower address of the color map, and the lower part of the color map. It consists of 4-bit raster color data indicating the raster color of the main text display area by the address.

19B shows the structure of each data unit constituting the data unit group. Since this structure is the same as that shown in Fig. 18B, the description thereof is omitted.

Hereinafter, a reception operation of the FM radio receiver 1b-1d that receives the multiplexed data described above will be described.

In case of listening to a general FM radio broadcast program by any one of the FM radio receivers 1b-1d, the control line B switches in response to a command given by the CPU 15 in relation to the key operation of the key input unit 18. 123 and 134 are operated to be ON. As a result, the receiving unit 12 and the audio information reproducing unit 13 are turned on.

Under this situation, when the FM broadcast wave is received at the antenna 11, it is tuned to the FM tuner 121 and demodulated by the FM demodulator 122. The stereo voice signal (L + R signal and LR signal), which is the signal demodulated by the FM demodulator 122, is separated into the L signal and the R signal by the stereo demodulator 131, and the voice corresponding to the separated L signal and the R signal. Sound is output from speakers 135 and 136 through respective amplifiers 132 and 133.

In the case where one of the FM radio receivers 1b-1d is used to listen to a general FM radio broadcast program and to watch an FM teletext broadcast program, the control line A is connected to the CPU in relation to the key operation of the key input unit 18. In response to the command given at 15, switches 123, 134, and 144 are actuated to be ON. As a result, power is supplied to all of the receiving unit 12, the audio information reproducing unit 13, and the multiplexing information reproducing unit 14.

In this case, when the above-described reception of the voice information is performed, the L-MSK demodulator 141 separates and demodulates the multiplexed signal, and error correction is performed in the error correction decoder 142, and the resultant signal is a CPU ( According to the instruction in 15), it is displayed on the display unit 17 as character information.

If you want to watch the FM teletext broadcast program, the control line C activates the switches 123 and 144. As a result, power is supplied to the receiving unit 12 and the multiplexed information reproducing unit 14. When the intermittent reception mode is specified, the CPU 15 sends a battery saving signal to the control line C.

When the user registers the information type ID of the information stored in the FM radio receiver 1, first, the user decides on the display unit 17 to display the content of the information type shown in FIG. The keys must be operated. Then, the user must operate a predetermined key on the key input section 18 to select the desired information type from the contents of the information type displayed on the display section 17. As a result, the associated information type ID is stored in the input data memory 23.

When the intermittent reception mode is specified by operating a predetermined key on the key input unit 18, the FM radio receiver 1 saves battery in the control line C to cause the CPU 15 to intermittently receive a subframe belonging to it. Have a signal.

20 to 22 show flowcharts for the case where the intermittent reception mode is designated. When the intermittent reception mode is specified, the FM radio receiver 1 first waits for a timing to start receiving its subframe (step A1). When the reception start timing for the subframe to the FM radio receiver comes in step A1, the receiving unit 12 and the multiplexed information reproducing unit 14 are turned on in response to a command given from the CPU 15 (step A2). .

Then, it is determined whether the reception end timing for the subframe for the FM radio receiver has been reached (step A3). When it is determined in step A3 that the reception termination timing for the subframe has not yet been made, it is determined whether the service ID code in the prefix is for paging information in the data packet constituting this subframe (step A5).

When it is determined in step A3 that the reception end timing for the subframe has been reached, the control line C operates to turn off the receiving unit 12 and the multiplexed information reproducing unit 14 in response to a command from the CPU 15. (Step A4). Processing returns to step A1 and waits for reception start timing for the subframe to the FM radio receiver.

In this case, as shown in Fig. 23B, these units are turned on at the reception start timing of the subframe in one frame, for example, subframe 7 as shown in Fig. 23A. When the service ID code of the subframe is not for the paging information, the receiving unit 12 and the multiplexing information reproducing unit 14 are turned off at the reception end timing for their subframe. If the FM station always inserts paging information into the data packet at the head of each subframe before transmitting, each FM radio receiver 1a-1d has the service ID code in the data packet at the head of the subframe being used for paging information. In determining that it is not, the receiving unit 12 and the multiplexed information reproducing unit 14 can be turned off.

When it is determined in step A5 that the service ID code in the prefix in the data packet constituting the subframe is for the paging information, the bit corresponding to the ID number in the ID group identification flag in the paging information shown in FIG. It is determined by referring to paging data (see Fig. 10) in the data packet constituting the subframe (step A6).

When it is not determined in step A6 that the bit is 1, the control line C turns off the receiving unit 12 and the multiplexed information reproducing unit 14 in response to a command from the CPU 15 (step A7). ). The process then returns to step 1 to wait for reception start timing for the subframe to the FM radio receiver. In other words, if the bit corresponding to the ID number in the ID group identification flag is not 1, the receiving section 12 and the multiplexed information reproducing section 14 are turned off when the determination is made.

When it is determined in step A6 that the bit is 1, it is determined whether the ID code MID which received the next ID group identification flag is 2 (10 in binary) (step A8). When it is not determined in step A8 that the ID code MID is 2, the ID code MID is 0 (zero in binary). In this case, the first to Nth paging IDs without a message and the Mth paging IDs with a message in the paging information shown in Fig. 13 are retrieved for its paging ID (step A14).

Then, it is determined whether its paging ID has been detected in the search in step A14. When it is determined in step A15 that its paging ID has not been detected, the control line C causes the receiving section 12 and the multiplexed information reproducing section 14 to be turned OFF in response to a command from the CPU 15 ( Step A23). In other words, when this cannot be detected in the retrieval of paging IDs in the transmission format of subframe 7 shown in Fig. 23C, the receiving unit 12 and the multiplexed information reproducing unit 14 are as shown in Fig. 23D. Likewise, it is turned off.

Next, it is determined whether the selection control data corresponding to the information type ID registered in the input data memory 23 is stored in the internal register of the CPU 15 by the processing described later (step A24). When it is determined in step A24 that no selection control data is stored in the internal register, the process returns to step A1 to wait for reception start timing for the next subframe to the FM radio receiver.

When it is determined in step A15 that this has been detected, it is determined whether this paging ID carries a message (step A16). When it is determined in step A16 that the paging ID carries no message, the control line C causes the receiving section 12 and the multiplexing information reproducing section 14 to be turned OFF in response to a command from the CPU 15. (Step A21). Then, the alarm unit 16 is activated in response to a command from the CPU 15 to start notifying the user that the FM radio receiver 1a, 1b, 1c, or 1d is paged (step A22).

Then, it is determined whether the selection control data corresponding to the information type ID registered in the input data memory 23 is stored in the internal register of the CPU 15 by the process described later (step A24). When it is determined in step A24 that no selection control data is stored in the internal register, the process returns to step A1 to wait for reception start timing for the next frame to the FM radio receiver.

When it is determined in step A16 that the paging ID carries a message, the paging information shown in Fig. 13 is retrieved for the message addressed to the FM radio receiver (step A24). Then, the retrieved message is stored in the reception data memory 21 (step A18). Next, as shown in Fig. 23E, the control line C causes the receiving section 12 and the multiplexed information reproducing section 14 to be turned off in response to a command from the CPU 15 (step A19). Then, the alarm unit 16 becomes active in response to the command from the CPU 15 and starts notifying the user that the FM radio receiver 1a, 1b, 1c, or 1d is paged (step A20). In addition, a message stored in the reception data memory 21 and addressed to the FM radio receiver is displayed on the display unit 17.

Then, it is determined whether the selection control data corresponding to the information type ID registered in the input data memory 23 is stored in the internal register of the CPU 15 by the process described later (step A24). When it is determined in step A24 that no selection control data is stored in the internal register, the process returns to step A1 to wait for reception start timing for the next frame to the FM radio receiver.

When it is determined in step A8 that the ID code MID is 2 (10 in binary), it is determined from the number of information types following the ID code MID, how many kinds of information are currently being broadcast (step A9). This decision is made after determining the end of the informational data group.

When the determination of the number of information types is finished, the information type IDs registered in the input data memory 23 by the user prior to reception are compared with one information type ID in the information type data group to determine whether they match each other. (Step A10).

When the determination on the two information type IDs is to be matched in step A10, the selection control data following the matched information type ID is stored entirely in the internal register of the CPU 15 (step A11). Then, it is determined whether the comparison between the registered information type ID and all received information type IDs has been completed (step A12). If the comparison is not completed, the process goes to step A10 and continues the comparison with the remaining received information type IDs. When the two information type IDs are not determined to match each other in step A10, the process proceeds to step A12 without executing the process in step A11.

When it is determined in step A12 whether the comparison of the registered information type ID with all received information type IDs has been completed, it is determined whether or not there is an ID code MID whose value is 0 (zero in binary) (step A13).

When it is determined in step A13 that there is an ID code MID having a value of zero, the process starts at step A14 and is associated with normal paging. When it is determined in step A13 that there is no ID code MID having a value of 0, the internal register of the CPU 15 is subjected to a process described later in which the selection control data corresponding to the information type ID registered in the input data memory 23 is described later. Is stored in the memory (step A25). When it is determined in step A25 that no selection control data is registered in the internal memory, the control line C responds to a command from the CPU 15 to turn off the receiving unit 12 and the multiplexing information reproducing unit 14 in the OFF state. (Step A26). Processing then returns to step A1 and waits for reception start timing for the next subframe to the FM radio receiver.

In other words, when an ID code MID having a value of 2 is included in the paging information, none of the received information type IDs match the registered information type ID, and no ID code MID having a value of 0 exists and the receiving unit 12 And the multiplexing information reproducing section 14 are turned off after confirming in step A25 that there is no selection control data in the internal register of the CPU 15.

When it is determined in step A25 that the selection control data is stored in the internal register, the intermittent reception mode is released and the mode is changed to the normal program reception mode (step A27). Then, processing associated with the program selected by the destination program number and the destination page number is executed in accordance with the information content of the operation mode of the receiver (step A28).

22 shows a detailed flow of step A28.

First, what is the information content of the receiver operation mode in the selection control data stored in the internal register of the CPU 150 is determined in step B1.

When the information content of the receiver operation mode is determined to be 0, the flow goes to step B2 and waits for reception of program data whose program number matches this destination program number in the selection control data.

When reception of the program data is executed, the page data having the page number in the selection control data is stored in the selected program data storage area in the reception data memory 21 (step B3).

When no destination page number is set in advance in the selection control data, all program data having the destination program number is stored. When the information content of the receiver operation mode is determined to be 1 in step B1, the flow goes to step B4 to wait for reception of program data whose program number matches the destination program number in the selection control data.

When the reception of the program data is detected, the page data having the page number in the selection control data is stored in the selected program data storage area in the reception data memory 21 in step B5. The alarm unit 16 then operates to inform the process (step B6).

In this case, the user can immediately know that program data of a desired information type has been received and stored, so that the reading of the key input section 18 to read the program data in the selected program data storage area and display it on the display section 17. By operating the keys you can view the desired program without delay.

When it is determined in step B1 that the information content of the receiver operation mode is 2, the flow goes to step B7 to wait for reception of program data whose program number matches the destination program number in the selection control data.

When the reception of the program data is detected, the page data having the page number in the selection control data is temporarily stored in the temporary storage area in the reception data memory 21, and the stored page data is displayed in the display section 17 in step B8. Is displayed on the screen and the alarm unit 16 is activated to inform the process.

In this case, the user can immediately see that the program data of the desired information type has been received and stored, so that the user can view the desired program without delay and without manipulating keys.

Since the program data is stored in the temporary storage area for updating and storing only the latest program data in step B8, no large capacity memory is required. This technique is effective at losing value when a program ages.

Program data is stored in the temporary storage area in step B8, but may also be stored in the selected program data storage area.

When it is determined in step B1 that the information content of the receiver operation mode is 3, the flow goes to step B10 in which the alarm unit 16 operates to inform processing.

In this case, the user can immediately know that the program data of the desired information type has been received and stored, so that the user can receive the desired program data and display the menu on the display unit 17 by performing the menu key operation of the key input unit 18. Thus, the desired program can be selected from the menu as in the normal case of viewing the program data.

In this case, the FM radio receiver 1 is free of some processing.

When the information content of the receiver operation mode is 3, only the notification processing is performed so that the intermittent reception mode does not have to be canceled in step A27.

When it is determined in step A24 or A25 that a plurality of selection control data are stored in the internal register of the CPU 15, the selection control data processing in Fig. 22 is executed in parallel with the number of the selection control data.

After this processing is completed in step A28, the processed selection control data stored in the internal register of the CPU 15 is erased (step A29) and the intermittent reception mode is set again (step A30). The process then returns to step A1 to wait for reception start timing for the next subframe to the FM radio receiver.

The FM radio receiver of this embodiment is designed to receive a personal ID data group and an informational ID data group assigned to it. However, the personal ID data group may be inserted in a subframe assigned to the receiver to be paged and the informational data group may be treated as a common frame for all receivers on the transmitting side (e.g., data packets contained in packet numbers 265 to 271). While each receiver may intermittently receive a subframe addressed to it and a common frame, it may be inserted into a subframe normally assigned to.

In this embodiment, a program having a program number in the selection control data added with the matched information type ID, upon receipt of the information type ID that the desired information type ID is selectively registered in advance and matching the registered information type ID; The associated process is executed. Alternatively, the number of the desired program can be selectively registered in advance, and upon receiving a program number that matches the registered program number, processing associated with the program having the program number can be executed.

However, if the information type ID is used as in this embodiment, there is a disadvantage that re-registration of data in the input data memory 23 becomes useless every time the type of program contents is changed. For example, when the type of program content corresponding to the program number is not necessarily fixed.

Although a control code for designating the receiver operation mode is added to the head of the selection control data before transmitting at the transmitting side in the above-described embodiment, as shown in Fig. 24, the receiver operates at the time of registering the information type ID at the receiving side. Changes may also be made to register the mode.

In the flowcharts shown in Figs. 20-22, the programs constituting the individual functions are stored in a ROM card (recording medium) in the form of a program readable by the CPU 15.

Even if the receiver 12 and the multiplexed information reproducing unit 14 are turned off in the intermittent reception mode of the above-described embodiment, the receiver 12 and the multiplexed information reproducing unit 14 can be turned off alone.

Although the above-described embodiment has been described in the case where the present invention is applied to the FM teletext broadcasting system, the present invention is not limited to this specific case, and TV teletext broadcasting as long as it can receive various kinds of program data. Like the system, it can be applied to any other system that transmits and receives broadcast waves.

It will be apparent to those skilled in the art that the present invention may be practiced in many other forms without departing from the spirit and scope of the invention.

In the first embodiment described above, the FM radio receivers 1a to 1d receive the paging data and the informational data during the subframe period assigned to the FM radio receivers 1a to 1d. However, the FM broadcast station 5 can transmit paging data during the subframe periods assigned to the receiver being paged and transmit informational data during the subframe periods commonly assigned to all the FM radio receivers 1a to 1d. Each of these receivers may intermittently receive its own subframe and common subframe. The data packet including the packet numbers 265 to 271 may be used as the common frame 16.

Hereinafter, as another embodiment, a paging system using FM teletext broadcasting will be described with reference to the drawings.

In addition to the data used to perform error correction in the error correction decoder 142, the EEPROM 20 stores program category names corresponding to the program category numbers shown in Fig. 25A as information type IDs. The EEPROM 20 also stores a program index name corresponding to the program index number.

As shown in Fig. 25A, the user can select and set program category names and program index names corresponding thereto by operating keys in the key input unit 18 as desired. The program category name and program index name set by the user are stored in the input data memory 23.

25B shows an example of a program category number stored in the input data memory 23 and a program index number corresponding thereto. Here, 3, 5, and 6 are selected and set as the program category number, while 1, 7, and 8 are selected and set as their program index number corresponding to the program category number 3.

In the segment 3 (paging data) shown in FIG. 13, when the value of the identification code MID is 2, the information type data as shown in FIG. 26 is inserted in the common frame 16. FIG.

Specifically, as shown in FIG. 26, the information type data group includes a segment identification, a segment data byte number, a character type, a number of message data bytes, a common information type code, a program category number, a program number, an update flag, and a page number. Include.

Segment identification consisting of four bits is set to a value 9 (1001) that defines the content of the segment data and indicates common information. The number of segment data bytes composed of four bits indicates the number of bytes composed of segment data. If necessary, an extended segment byte number that is one byte of data may be added.

The character type consists of 2 bits and determines the shape of the segment data. The value 3 (11) is used in character form. The message data byte number consists of 6 bits and represents the number of bytes constituting all information type data according to the common information type code.

The common information type code consists of 1 byte and represents a common information type so that it can be used as another information type in the future. In the case of information type data, the common information type code value is zero.

An informational data group has one or more informational data. The information type data includes one byte program category number, one byte program index name, one byte program number, two bit update flag, and six bit page number.

The program category number indicates a program category, the contents of which are as shown in Fig. 25A. The program index name represents one of the indexes corresponding to the category, the contents of which are as shown in Fig. 25A.

The program number indicates a number assigned to a program for broadcast information of the type indicated by the program category number and the program index name. The update flag is incremented when the informational data is updated. The page number designates the page number when receiving data continuously. However, when the page number indicates the maximum value 63, it does not specify the page number and has the same contents as in the prefix.

As shown in Figs. 17, 18A and 18B, the program management data includes a program data header, which is a data header of the program management data, and a data unit group. Program data to which information having the format shown in FIG. 27 is added as data unit data is transmitted.

As shown in Fig. 27A, the data unit group includes a 4-bit ID code whose value is fixed to 2 (0010), the number of data unit data bytes that are 4-bit data, the one-byte category index update flag, and the one-byte program category number. , 1-byte index number, 4-bit data whose value is fixed to 0 (0000), 4-bit data indicating the type of service entrusted by the service center, service center receiving box number (upper 1 byte and lower 1 byte), 1 Byte transfer type data, and a 2-byte search index. The actual program data is transmitted following the search index.

The number of bytes of data unit data represents the length of data that follows. The category index update flag is incremented by one when the data unit data is updated. The update flag represents one of the values 00h to ffh.

The program category number indicates a program category as shown in Fig. 25A. Program category number 0 indicates a program list. Program category number 1 indicates a program for broadcasting a set sentence. Program number 2 indicates the record receiving menu. In the case of broadcasting a program list, a set sentence broadcast program and a record receiving menu are allocated to a program list, a set sentence broadcast program, and a record receiving menu during the same time, which is different from the program number.

The service type entrusted by the service center indicates the service ID number required to access the service center through the communication line. When the service ID number is 1010, the service center provides a message board service. When the service ID number value is 1011, the service center provides a program request service.

When a user accesses a service center via a telephone line and sends a response to a program through a receiver, the response is sent to a box at the service center computer designated by the service center receiving box number. The service center receiving box number consists of 2 bytes and represents one of the values 0 to 4096.

The format data represents one of the values 0 to 127 and its lower 7 bits indicate the format of the format. The most significant bit of the format data indicates a 1, indicating that each FM radio receiver is in code number input mode at the end of data transmission. When the most significant bit of the format data indicates zero, this indicates that each FM radio receiver is not in code number input mode.

The search index indicates whether or not a search for each item b1 to b16 (e.g., place name and price) is performed. When the search index value is 1, the search may be performed. When the search index value is 0, the search cannot be performed.

The operation of this embodiment will be described below.

If one wants to listen to a general FM radio broadcast program by one of the FM radio receivers 1b-1d, the control line B is connected to the command given by the CPU 15 in association with the key operation of the key input unit 18. In response, the switches 123 and 134 operate to be set ON. As a result, the receiving unit 12 and the multiplexed information reproducing unit 14 are turned on.

Under this situation, when the FM broadcast wave is received at the antenna 11, it is tuned by the FM tuner 121 and then demodulated by the FM demodulator 122. The stereo voice signal (L + R signal and LR signal), which is the signal demodulated by the FM demodulator 122, is separated into the L signal and the R signal by the stereo demodulator 131, and the voice corresponding to the separated L signal and the R signal. Sound is output from speakers 135 and 136 through amplifiers 132 and 133.

If you want to listen to a general FM radio broadcast program using any one of the FM radio receivers 1b-1d and watch the FM teletext broadcast program, the control line A is connected to the CPU in relation to the key operation of the key input unit 18. It is operated to set the switches 123, 134, and 144 to ON in response to the command given at 15. As a result, the receiving unit 12, the audio information reproducing unit 13, and the multiplexed information reproducing unit 14 are turned on.

In this case, while the aforementioned reception of the voice information is performed, the L-MSK demodulator 141 separates and demodulates the multiplexed information in the error correction decoder 142. This is then subjected to error correction and displayed as character information on the display unit 17 in accordance with the instruction of the CPU 15.

If you want to watch the FM teletext broadcast program, the control line C operates so that the switches 123 and 144 are turned on. As a result, the receiving unit 12 and the multiplexed information reproducing unit 14 are turned on. When the intermittent reception mode is specified, the CPU 15 sends a battery saving signal to the control line C.

When the user registers in advance the information type ID of the information stored in the FM radio receiver 1, first of all, the user can enter the program category number and name, the program index number and the number among the information type IDs, that is, as shown in Fig. 25A. In the command, a predetermined key on the key input section 18 must be operated to display a table indicating either one. Then, the user must operate a predetermined key on the key input unit 18 to select a desired number from the program category number and the program index number on the display unit 17. As a result, the selected program number and program index number are stored in the input data memory 23 as information type data.

Each FM radio receiver 1a, 1b, 1c, 1d belongs to one of 16 groups separated based on the lower 4 bits of data in their ID code. Each FM radio receiver 1a, 1b, 1c, 1d is designed to intermittently receive a subframe and a common subframe corresponding to the group to which the FM radio receiver actually belongs.

When the intermittent reception mode is specified, the FM radio receiver 1 waits for timing to receive its subframe (step C1). When the reception start timing for the subframe to the FM radio receiver is made in step C1, the receiving unit 12 and the multiplexed information reproducing unit 14 are turned on in response to a command from the CPU 15 (step C9). .

When it is determined in step C10 that the reception termination timing for the subframe has not yet been made, it is determined whether the 4-bit service ID code in the prefix shown in Fig. 9B is for paging information in the data packet constituting this subframe (step C12). This decision is made repeatedly.

When it is determined in step C10 that the reception end timing for the subframe has been reached, the control line C operates to turn off the receiving unit 12 and the multiplexed information reproducing unit 14 in response to a command from the CPU 15. (Step C11). Processing goes to step C1 and waits for reception start timing for a subframe to the FM radio receiver.

In this case, as shown in Fig. 32B, these parts are turned ON at the reception start timing of one frame, for example, its subframe in subframe 7 shown in Fig. 32A. When the service ID code of the subframe is not for the paging information (intermittent reception), the receiving unit 12 and the multiplexed information reproducing unit 14 are turned off at the reception end timing for its subframe.

If the FM station always inserts paging information into the data packet at the head of each subframe before transmitting, each FM radio receiver (when determining that the service ID code in the data packet at the head of the subframe is not for paging information). 1a-1d may turn off the receiver 12 and the multiplexed information reproducer 14.

When it is determined in step C12 that the service ID code for the paging information is detected in the subframe, the reference to the paging data shown in FIG. 10 and included in the data packet constituting the subframe is immediately made and the paging information shown in FIG. It is determined whether the ID group identification flag in D matches the flag assigned to the FM radio receiver (step C13).

When it is not determined that the ID group identification flag does not match the flag assigned to the FM radio receiver, the control line C responds to the command from the CPU 15, and the receiving section 12 and the multiplexed information reproducing section 14 Is operated to be OFF (step C14). Processing goes to step C1 and waits for reception start timing for a subframe to the FM radio receiver.

In short, if the ID group identification flag does not match the flag assigned to the FM radio receiver, the receiving section 12 and the multiplexed information reproducing section 14 are immediately turned OFF.

When it is determined in step C13 that the ID group identification flag matches the flag assigned to the FM radio receiver, the first to M with the first to Nth paging IDs and the message not having the message in the paging information shown in FIG. The first paging IDs are retrieved for the paging IDs of the FM radio receiver (step C15).

Then, it is determined that its paging ID has been detected in the search of step C15 (step C16). When it is determined in step C16 that a paging ID has not been detected, the control line C is operated so that the receiving section 12 and the multiplexed information reproducing section 14 are turned OFF in response to a command from the CPU 15 (step C17). The process then goes to step C1 and waits for reception start timing for the subframe to the FM radio receiver.

When it is determined in step C16 that its paging ID has been detected, it is determined whether this paging ID carries a message (step C18). When it is determined in step C18 that the paging ID does not carry a message, the control line C is operated so that the receiving section 12 and the multiplexed information reproducing section 14 are turned OFF in response to a command from the CPU 15. (Step C19). Then, the alarm unit 16 is activated in response to a command from the CPU 15 and starts to inform the user that the FM radio receivers 1a, 1b, 1c, 1d are paged (step C20). Processing then returns to step C1 and waits for reception start timing for the subframe to the FM radio receiver.

When it is determined in step C18 that the paging ID carries a message, the paging information shown in Fig. 13 is retrieved for the message addressed to the FM radio receiver (step C21). Then, the retrieved message is stored in the reception data memory 21 (step C22). Then, the control line C is operated so that the receiving section 12 and the multiplexed information reproducing section 14 are turned OFF in response to a command from the CPU 15 (step C23). The alarm unit 16 then operates in response to a command from the CPU 15 and starts to inform the user that the FM radio receiver 1a, 1b, 1c, or 1d is paged (step C24). Processing then returns to step C1 and waits for reception start timing for the subframe to the FM radio receiver.

The processing in steps C9 to C24 is performed when it is determined in step C1 that it is time for each FM radio receiver 1a-1d to receive its subframe. When it is determined in step C1 that it is not time to start receiving its subframe, it is determined whether the program category number and the index number are selected as the information type ID and set in the input data memory 23 (step C2).

When it is determined that the program category number and the index number have been selected and set in the input data memory 23, each of the FM radio receivers 1a to 1d waits for a time to start receiving the common frame (step C3). At this time, it is determined that it is time to start receiving the common frame, and the CPU 15 operates the control line C and causes the receiving unit 12 and the multiplexed information reproducing unit 14 to be in an ON state (step C4).

Then, it is determined that it is time to end reception of the common subframe (step C5). When it is determined in step C5 that it is not time to start receiving the common subframe, whether the 4-bit service identification code is the service identification code for the intermittent reception in the prefix of the received data packet forming the subframe shown in FIG. Is determined (step C6).

When it is determined that the 4-bit service identification code is not for intermittent reception, the process returns to step C5. When it is determined that the 4-bit service identification code is for intermittent reception, it is determined whether the value of the segment identification at the head of the data block indicates 9 as shown in Fig. 26 (step C7).

When it is determined that the segment identification value is not 9, the process returns to step C5. When the segment identification value is 9, it is determined whether the common information type code is 0 (step C8).

When it is determined that the common information type code value is not zero, the process returns to step C5. At this time, it is determined in step C5 that it is time to finish receiving the common frame, and the CPU 15 causes the control line C to be inactive so that the receiver 12 and the multiplexed information reproducing unit 14 are turned off. The process then goes to step C1 and each FM radio receiver 1a to 1b waits for the time to start receiving its next subframe.

In this case, the receiving unit 12 and the multiplexed information reproducing unit 14 are turned on as shown in Fig. 32B at the timing when the common subframe 16 in one frame starts, as shown in Fig. 32A. When the common information service identification code is not detected in the subframe 16, the receiving unit 12 and the multiplexed information reproducing unit 14 are turned off at the timing when the common frame 16 ends.

When it is determined in step C8 that the common information type code value is 0, the variable n representing the program category number is set to an initial value 1 (step C25). Then, the n-th program number received with the information type data in the common subframe 16 and the program category number set in the input data memory 23 are compared with each other (step C26). Based on the comparison result in step C26, it is determined whether two category numbers match each other, that is, whether a program to be received is broadcast (step C27).

When it is determined in step C27 that the two program category numbers do not coincide with each other, a determination is made as to whether the comparison between the received nth category number and all program category numbers set in the input data memory 23 is finished (step C33). When it is determined in step C33 that the comparison between the received nth category number and all program category numbers set in the input data memory 23 is not finished, the process returns to step C26. When it is determined that the comparison between the received nth category number and all program category numbers set in the input data memory 23 is finished, between the received nth category number and all program category numbers set in the input data memory 23. It is determined that the comparison is finished (step C34).

When it is determined that the comparison between the received nth category number and all program category numbers set in the input data memory 23 is not finished, the variable n value is increased by 1 (step C35), and the process returns to step C26.

When it is determined in step C27 that the program category numbers do not coincide with each other, it is determined whether or not the corresponding program index number is set in the input data memory 23 (step C28).

When it is determined in step C28 that the corresponding program index number has been set in the input data memory 23, these program index numbers are compared with the received program index number following the program category number (step C29), and the input data memory 23 It is determined whether there is a match between the corresponding program index number set in step 2) and the received program index number (step C30).

When it is determined in step C30 that there is no match between the corresponding program index number set in the input data memory 23 and the received program index number, all program index numbers set to match the program category number are compared with the received program index number. A determination is then made as to whether or not it is (step C36). When it is determined in step C36 that all of these have not been compared with the received program index number, the process returns to step C29.

When it is determined in step C30 that there is a match between the corresponding program index number set in the input data memory 23 and the received program index number, or that such a corresponding program index number has not been set in the input data memory 23. When determined, a reference is made to the update flag in the received data, and it is determined whether equality program data has already been received and stored in the received data memory 21 (step C31).

When it is determined in step C31 that the same program data has not yet been received or stored in the reception data memory 21, the program number and page number of the received information type data are received as the selection control data for use in the reception of the program. It is stored in the data memory 21 (step C32), and the processing proceeds to C34.

Further, when it is determined in step C36 that all program index numbers set in accordance with the program category number have been compared with the received program index number, the process goes to step C34.

When it is determined in step C34 that the comparison is finished between the program category number set in the input data memory 23 and all the received program category numbers, the processing is to be executed based on the selection control data stored in the received data memory 21. Go to step C37.

In step C37, it is determined whether the selection control data has been stored in the reception data memory 21. When it is determined in step C37 that the selection control data has not been stored, the CPU 15 deactivates the control line C to turn off the receiving unit 12 and the multiplexed information reproducing unit 14 (step C38). . Processing returns to step C1, and each FM radio receiver 1a-1d waits for a time to start receiving its next subframe.

When it is determined in step C37 that the selection control data has been stored in the reception data memory 21, the intermittent reception mode is shifted to the continuous reception mode (step C39), and the process proceeds to step C40. In step C40, it is determined whether the program data specified by the program number in the selection control data stored in the reception data memory 21 has been received. When it is determined in step C40 that program data specified by the program number in the selection control data has been received, it is determined whether the selection control data specifies the page number (step C42).

When it is determined in step C42 that the selection control data designates a page number, reception of the program data of the designated page number and storage of the program data into the reception data memory 21 are started (step C43). When it is determined in step C42 that the selection control data does not specify any page number, reception of the designated program and storage of the program data in the reception data memory 21 are started regardless of the page number (step C44).

When it is determined in step C40 that the program data designated as the selection control data has not been received, a determination is made based on the information type data received in the common subframe 16 as to whether the broadcast of the program data designated as the selection control data has ended ( Step C41). When it is determined in step C41 that the broadcast of the program data designated as the selection control data has not ended, the process returns to step C40.

In step C43 or C44, reception and storage of the designated program data starts, and then it is determined whether reception and storage of the program data are finished (step C45). When it is determined in step C45 that the reception and storage of the program data is not finished, a determination is made based on the information type data received in the common subframe 16 as to whether the broadcast of the program data designated as the selection control data has ended (step C46). . Steps C45 and C46 are repeated until it is determined in step C46 that the broadcast of the designated program has ended, and reception and storage of program data continues.

When it is determined in step C45 that the reception and storage of the program data is finished, or when it is determined in step C46 that the broadcast of the designated program data has ended, or when it is determined in step C41 that the broadcast of the designated program data has ended, the received data The selection control data stored in the memory 21 is deleted (step C47), and the continuous reception mode is switched to the intermittent reception mode (step C48). Processing again goes to step C1, and each FM radio receiver 1a to 1d waits for a time to start receiving its next subframe.

When a plurality of selection control data items are stored in the reception data memory 21, steps C40 to C46 are executed based on the respective selection control data items. At this time, reception and storage of all the program data items designated for each selection control data ends, and the process proceeds to step C47.

As can be seen in steps C41 and C46, when the broadcast of desired program data is terminated during reception or storage of the program data, the continuous reception mode is canceled and the intermittent reception mode is returned. This can prevent wasteful power consumption of the battery in the FM radio receivers la to 1d.

In this embodiment, the program number and page number are set as informational data. Therefore, when the page number is set, only the information of the page is received and stored. As a result, only the information necessary for the reception data memory 21 is stored so that the reception data memory 21 can be effectively used.

Claims (36)

In a broadcasting device for broadcasting a plurality of types of program information: First broadcasting means for broadcasting the plurality of types of program information; And a second broadcast means for broadcasting information type data indicative of a kind of on-the-air program information among the plurality of types of program information. The broadcast apparatus according to claim 1, wherein the second broadcast means broadcasts the information type data in a predetermined period previously allocated to a broadcast receiving apparatus for receiving the program information. The broadcast apparatus according to claim 1, wherein the second broadcast means broadcasts the information type data and paging identification data of the broadcast receiving apparatus that is paged for a predetermined period previously allocated to the broadcast receiving apparatus to be paged. . 2. The process according to claim 1, wherein the second broadcast means is further configured to designate a process to be executed by the broadcast receiving apparatus that receives the information type data and when the received information type data is desired by the user. A broadcast apparatus characterized by broadcasting specified data. 5. The broadcast apparatus according to claim 4, wherein the process designation data designates a process for notifying the user that a program associated with an information type desired by the user is on the air. 5. The broadcasting apparatus according to claim 4, wherein the process specifying data specifies a process of displaying program information associated with a type of information desired by a user. 5. The broadcasting apparatus according to claim 4, wherein the process specifying data specifies a process of storing program information associated with a type of information desired by a user. 2. The broadcasting apparatus according to claim 1, wherein said second broadcasting means broadcasts said information type data and program identification code data indicating a program for transmitting information of a type indicated by said information type data. The broadcast apparatus according to claim 1, wherein the first and second broadcast means broadcast the program information and the information type data multiplexed by FM broadcast waves. In the broadcasting device for broadcasting a plurality of programs: First broadcasting means for broadcasting the plurality of programs; And a second broadcast means for broadcasting program identification data indicating a program in broadcasting from among the plurality of programs in a predetermined period previously allocated to a broadcast receiving device that receives program information. In a transmitting device for transmitting a plurality of types of programs: First transmitting means for transmitting the plurality of types of programs; And second transmitting means for transmitting information type data indicative of a kind of information being transmitted among said plurality of types of information. A broadcast receiving apparatus for receiving and displaying a plurality of types of program information broadcasts: Receiving means for receiving first information type data indicating an information type of program information during broadcasting among the plurality of types of broadcast program information; Information type data setting means for setting second information type data; Comparison means for comparing the first information type data received by the receiving means and the second information type data set by the information type data setting means; And control means for executing a process for program information associated with the matched information type data when the comparison by the comparing means is matched. 13. The broadcast receiving apparatus according to claim 12, wherein said receiving means receives said first information type data by intermittent reception which performs reception in a predetermined period previously allocated to said broadcast receiving apparatus. 13. The apparatus of claim 12, wherein the receiving means receives the first information type data and the paging identification data by intermittent reception which performs reception in a predetermined period previously allocated to the broadcast receiving apparatus; Discriminating means for discriminating whether or not the paging identification data received by the receiving means is paging identification data of the broadcast receiving apparatus; And paging notification means for informing paging when the paging identification data is determined by the determining means as paging identification data of the broadcast receiving apparatus. 13. The apparatus of claim 12, further comprising: notification means for executing a process of notifying that program information associated with the matched information type data is on the air; And the control means causes the notification means to execute the notification processing. 13. The apparatus of claim 12, further comprising display means for displaying program information associated with the matched informational data; And the control means causes the display means to display the program information. 13. The apparatus of claim 12, further comprising storage means for storing program information associated with the matched information type data; And the control means causes the storage means to store the program information. 14. The apparatus of claim 13, further comprising display means for displaying program information associated with the matched informational data; And the control means causes the display means to display the program information after causing the receiving means to cancel the intermittent reception. 19. The broadcast receiving apparatus according to claim 18, wherein said control means causes said receiving means to perform intermittent reception after causing said display means to display said program information. 14. The apparatus of claim 13, further comprising storage means for storing program information associated with the matched information type data; And the control means causes the storage means to store the program information after causing the reception means to release the intermittent reception. 21. The broadcast receiving apparatus according to claim 20, wherein said control means causes said receiving means to perform intermittent reception after causing said storage means to store said program information. 13. The apparatus according to claim 12, wherein said receiving means receives said first information type data and designation data for specifying processing to be executed by said control means; And the control means executes processing for program information associated with the matched information type data in accordance with the designated data received by the receiving means. 13. The apparatus of claim 12, wherein the receiving means receives the first information type data and program identification data indicating a program having a type indicated by the first information type data; And the control means executes processing for program information according to the matched information type data and the program identification data received by the receiving means. 13. The apparatus according to claim 12, further comprising designation data setting means for setting designation data designating a process executed by the control means; And the control means executes processing for program information associated with the matched information type data according to the designated data set by the designated data setting means. The broadcast receiving apparatus according to claim 12, wherein said receiving means receives said program information and said first information type data multiplexed by FM broadcast waves. In a broadcast receiving device for receiving and displaying a plurality of types of program information broadcasts: Receiving means for receiving first program identification data indicating program information during broadcasting from among the plurality of types of broadcast program information by intermittent reception performing reception in a predetermined period previously allocated to the broadcast receiving apparatus; Program identification data setting means for setting second program identification data; Comparison means for comparing the first program identification data received by the reception means with the second program identification data set by the program identification data setting means; And control means for executing a process for program information according to the matched program identification data when the comparison by the comparing means is matched. A receiving apparatus for receiving and displaying a plurality of types of information to be transmitted: Receiving means for receiving first information type data indicating a kind of information transmitted from the plurality of types of transmission information; Information type data setting means for setting second information type data; Comparison means for comparing the first information type data received by the receiving means and the two information type data set by the information type data setting means; And control means for executing a process on the program information associated with the matched information type data when the comparison by the comparing means is matched. A broadcast system comprising a broadcast device for broadcasting a plurality of types of program information and a broadcast receiver device for receiving and displaying program information broadcasted by the broadcast device, The broadcast device is: First broadcasting means for broadcasting the plurality of types of program information; A second broadcasting means for broadcasting first information type data indicative of a kind of program information during broadcasting among the plurality of kinds of program information to be broadcast; Each of the broadcast receiving apparatuses is: Receiving means for receiving said plurality of types of program information and said first information type data broadcast by said first broadcasting means and said second broadcasting means, respectively; Information type data setting means for setting second information type data; Comparison means for comparing the first information type data received by the receiving means and the second information type data set by the information type data setting means; And control means for executing a process for program information associated with the matched information type data when the comparison by the comparing means is matched. A broadcast system comprising a broadcast device for broadcasting a plurality of programs and a broadcast receiver device for receiving and displaying a program broadcasted by the broadcast device, The broadcast device is: First broadcasting means for broadcasting the plurality of programs; A second broadcast means for broadcasting first program identification data indicating a program in a broadcast among the plurality of programs broadcast in a predetermined period previously allocated to the broadcast receiving device receiving a broadcast program, Each of the broadcast receiving apparatuses is: Receiving means for receiving said first program identification data broadcasted to said second broadcast means by intermittent reception performing reception in a predetermined period previously assigned to each broadcast receiving apparatus; Program identification data setting means for setting second program identification data; Comparison means for comparing the first program identification data received by the reception means with the second program identification data set by the program identification data setting means; And control means for executing a process for a program according to the matched program identification data when the comparison by the comparing means is matched. A transmitting / receiving system comprising a transmitting device for transmitting a plurality of types of information and a receiving device for receiving and displaying information transmitted from the transmitting device. The transmitter is: First transmitting means for transmitting the plurality of types of information; A second transmitting means for transmitting first information type data indicative of a kind of information being transmitted from said plurality of types of information, Each of the receivers is: Receiving means for receiving said plurality of types of information and said first information type data respectively transmitted by said first transmitting means and said second transmitting means; Information type data setting means for setting second information type data; Comparison means for comparing the first information type data received by the receiving means and the second information type data set by the information type data setting means; And control means for executing a process for program information associated with the matched information type data when the comparison by the comparing means is matched. A first step of broadcasting a plurality of types of program information; And a second step of broadcasting information type data indicative of a kind of program information during broadcasting among the plurality of types of program information. A first step of broadcasting a plurality of programs; And a second step of broadcasting program identification data indicating a program in a broadcast among the plurality of programs broadcast in a predetermined period previously allocated to a broadcast receiving device receiving the program information. A first step of transmitting a plurality of types of information; And a second step of transmitting information type data indicating a kind of information being transmitted from among the plurality of types of information. Receiving first information type data indicating an information type broadcasting program among a plurality of types of broadcasting program information; Setting second information type data; Comparing the received first information type data with the set second information type data; And when the comparison is matched, executing a process on program information associated with the matched information type data. Receiving first program identification data indicating in-broadcast program information from among a plurality of types of broadcast program information by intermittent reception performing reception in a predetermined period previously allocated to the broadcast receiving apparatus; Setting second program identification data; Comparing the received first program identification data with the set second program identification data; And when the comparison is matched, executing processing for program information according to the matched program identification data. Receiving first information type data indicating a kind of information transmitted from a plurality of types of transmission information; Setting second information type data; Comparing the received first information type data with the set second information type data; And when the comparison is matched, executing a process on the information associated with the matched informational data.