KR100426756B1 - Multi broadcasting receiver - Google Patents

Abstract

In the FM multicasting, when transmitting program data, the present invention provides an FM multicasting receiver capable of specifying the start date, the end date, and the erase date and time of a program.

The CPU 40 in the FM multicast reception apparatus 100 includes program data in the received broadcast profile data based on operation mode data included in the broadcast program management data in the data provided from the FM multi-signal decoding unit 15. It is judged whether or not. At the same time, the start date, end date and erasing date and time of the program are extracted and stored in the memory 30 based on the parameter data subsequent to the broadcast program control command in the broadcast program management data. The CPU 40 executes a program only within a specified period based on these data stored in the memory 30, and executes a program erase operation in the memory 30 when the erase date and time have been reached.

Description

Multicast receiver

The present invention relates to a digital multiplex signal receiving apparatus that receives a plurality of pieces of information data divided into a plurality of unit data and transmits the same, and more particularly, the received data is transmitted by FM multicasting. The information data relates to a multiple broadcast transmitting device and a receiving device including program data (operation program of the computing processing device).

In recent years, as one of the broadcasts providing new services, development and practical use of FM multicasting, which multiplexes and transmits a digital signal to an empty spectral region of a baseband signal of FM stereo broadcasting, is progressing.

FM multicasting is a new medium that broadcasts traffic information, character and figure information, and the like by multiplying a digital signal in a frequency band higher than that of an existing FM stereo broadcast. It is characterized by the fact that the frequency can be effectively used, the broadcasting equipment can be easily realized, and since the data can be received from the moving object, the traffic information can be easily transmitted to the moving object such as a car.

Accordingly, FM multicasting can access real-time congestion information or the like for a vehicle equipped with a receiver, or anytime, anywhere access to necessary information for a user having a handy receiver. Some practical applications have been disclosed as a means of providing a low cost transmission path.

Hereinafter, before explaining the structure of the conventional FM multicasting receiver, the outline of the data structure in FM multicasting will be described.

[FM multicasting method]

In FM multicasting, there are multipath disturbances and paging disturbances as factors that degrade the reception state. In particular, in the case of moving object reception, the transmission path characteristics are generally very poor. Even in that case, it is desirable to have a system that can receive completely at once. In reality, however, there is a case that it is not possible to completely receive data transmitted in one reception, and then it is assumed that data to be retransmitted is received to compensate for data that could not be received. The service area of the FM multicast is preferably equivalent to the service area of the FM stereo broadcast, but there are places where the average bit error rate exceeds 10 ⁻² even within this service area. Therefore, the error correction scheme and the frame configuration of the structure of the data to be transmitted have been determined in consideration of such poor transmission path characteristics.

In particular, errors caused by extreme voltage drops due to paging disturbances are fatal and error correction is sometimes impossible. Therefore, by matching the unit data length of the transmitted data to the average burst length of errors caused by paging, if an error that cannot be corrected in error occurs, the unit data can be replaced with the retransmitted unit data for each unit data. It becomes possible.

In addition, since the error correction effect is high, an appropriate code in which two block codes are arranged orthogonally is used as the error correction method. Thus, the data takes a two-dimensional frame structure that includes error correction codes in both the transverse and longitudinal directions.

The transmission data is a data structure having a hierarchical structure in which data in the one frame is a basic unit.

As a specific example of what has been described above, the FM multicasting method disclosed in Proc. Of Vehicle Navigation & Information Systems Conference (1994) A4-2 pp. 111 to 116 will be described.

In Fig. 14, the specification of the hierarchical structure of the data is shown.

In layer 1, transmission path characteristics are specified. In addition to the L + R signal and the L-R signal, which are ordinary FM stereo broadcast signals, multiple signals are superposed on the high frequency side than the L-R signal.

This superposition method adopts the LMSK (Level controlled Minimum Shift Keying) method in which the level of the multiple signal is controlled by the modulation degree of the LR signal in consideration that the interference from the multiple signal to the speech signal becomes significant when the speech modulation degree is small. have.

Layer 2 defines a frame structure of data, including an error correction scheme. Each frame consists of 272 blocks in the column direction, and a 16-bit Block Identification Code (BIC) is added at the beginning, and frame synchronization and block synchronization are performed based on this BIC. Among the 272 blocks in the column direction, 190 blocks are packets for transmitting data, and 82 blocks are parity packets for transmitting parity in the column direction. Each packet is composed of an information section of 176 bits in a row direction, a 14-bit cyclic redundancy code (CRC) that is an error correction code, and a parity section of 82 bits.

In other words, in the transmission data, error correction is first performed in this step based on this one frame.

Layer 3 specifies the organization of data packets. The data packet consists of 176 bits excluding BIC, CRC, and parity of each row in the frame.

In addition, this data packet consists of a prefix and a data block. The prefix contains information for identifying the content of the data, and for example, the data packet belongs to the contents of a broadcast program (referred to as news, drama, sports, quiz, etc. produced for broadcasting, hereinafter same). Is specified.

Layer 4 defines the organization of data groups. A data group consists of one or more data blocks. That is, based on the information in the prefix in the data packet, the data packet number is arranged in order from the data packet number from "0" to the data block in which the information output flag in the prefix is set. Also in this data group, the CRC which is an error correction code is included, and the transmission data is also error corrected in this layer.

One data group corresponds to one display unit, that is, one page of data.

Layer 5 defines the composition of one unified information data, ie broadcast profile data, transmitted by FM multicast. Fig. 15 shows the structure of this broadcast profile data. A broadcast program of character and graphic information is composed of a plurality of data groups, and the head data group is broadcast program management data, and is encoded information throughout the broadcast program such as broadcast program number and page total number. There is a plurality of page data in succession to the broadcast management data, and data for each page is encoded.

The broadcast program management data and page data are composed of a data header portion and a data unit group. The data unit group is composed of a plurality of data units divided for each encoding, such as a character data portion and a photographic graphic data portion.

That is, in the data structure as described above, the broadcast program data constitutes a group of data representing one piece of integrated information on the receiving side. For example, in the case of traffic information, the broadcast program information indicates a congestion situation at each junction (junction point) of a specific line (highway, etc.), and in the case of a weather forecast, it indicates weather forecast information or the like in a specific area.

[Configuration of Conventional FM Multicasting Receiver]

Fig. 16 is a schematic block diagram showing the configuration of a conventional FM multicast receiver 10.

The FM multicast signal received by the antenna 12 and the tuner 14 is detected by the detection circuit 16 and further provided to the LMSK demodulation circuit 20 via the band pass filter 18. The LMSK demodulation circuit 20 performs data demodulation of the LMSK modulated FM multicast signal to extract the FM multisignal. The demodulated data signal is subjected to frame synchronization and block synchronization on the basis of the BIC in the synchronous reproducing circuit 22 as described in layer 2 of FIG. The synchronized data signal is error corrected in the error correction circuit 24 based on the parity code and the CRC.

Therefore, the packet data (having the configuration shown in layer 3 in Fig. 14) of the FM multicasting which is normally received or has been subjected to error correction from the error correction circuit 24 is output.

The central processing unit 40 (hereinafter referred to as CPU) performs input block data extraction, data block reconstruction, data group reconstruction, error correction at the data group stage, and reconstruction into broadcast program data. Thereafter, broadcast program data is output to the display device 42. The display device 42 outputs the input broadcast program data as a figure or a character.

As the display device 42, a liquid crystal screen having a display area for one page, that is, 248 x 60 dots (equivalent to 15.5 characters x 2.5 lines in Japanese notation) is used.

Since the conventional FM multicasting receiver 10 has the above configuration, there have been the following problems.

That is, the information data transmitted by the FM multicasting is limited to character and figure information such as traffic information and weather forecast information, for example, as described above. The receiver did not exist.

That is, in FM multicasting, each piece of information data is divided into unit data and transmitted as a data packet. Since this data packet is time-divisionally transmitted for a plurality of information data, it is necessary for the receiver to determine the type of the information data and to perform a corresponding processing operation.

In the case described above, as a broadcast program broadcasted by the transmitted program data, that is, in conjunction with the progress of a listener-participated broadcast program, for example, a television broadcast, a few questions are asked, and the listener side until the deadline. We can think of broadcast form that answer is sent, and after the deadline, correct answer is sent and listener checks.

In this case, it is necessary to set a deadline for a response such as several hours or one day, and take a broadcast format in which prizes are sent to the listeners according to the result of the decision or the result of the decision.

Therefore, the receiver side needs a function to start the corresponding process with respect to the received program data after a predetermined time has elapsed, and stop the process after the elapse of the deadline time.

In addition, for unnecessary program data stored in the receiver side, it is necessary to forcibly erase the program data from the receiving side.

In addition, in the case of receiving foreign exchange information, stock information, or the like by FM multicasting, the transmitted data is character and figure information unlike the above program data. It is necessary to forcibly erase the stored information data. Conventionally, in order to erase the character and figure information already broadcasted and stored on the receiver side, it has been necessary to communicate the contents by transmitting new page data. However, in this method, it is difficult to cope with a change in the amount of information broadcasted according to the time zone.

Technical problem to be invented

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide a start time of a program data on a receiver side, a finish time of a process, and an erase time of a corresponding program data when transmitting program data in FM multicasting. It is to provide a multi-cast reception apparatus capable of controlling from the transmitting side.

Another object of the present invention is to provide a multicast receiver capable of forcibly erasing character and figure information from a transmitting side even when character and figure information and the like are transmitted.

The multicast reception apparatus according to claim 1 includes information data to which each unit data belongs and identification data indicating a position in the information data in a multi-communication system in which each of the plurality of information data to be transmitted is divided into a plurality of unit data and transmitted. A multi-broadcast reception apparatus for receiving transmission data, comprising: demodulation means for receiving and demodulating a carrier wave for transmitting the unit data by multiplex transmission; and receiving an output of the demodulation means, extracting multiple signals, and outputting them as corresponding digital signals; Multi-signal decoding means for outputting, time-keeping means for outputting time data representing the current date and time, and arithmetic processing means for receiving the output of the multi-signal decoding means and synthesizing the information data according to the identification data; The operation processing means includes: operation start date and time contained in the information data Extracting itaconic and operation finish date and time data, and based on the comparison result of the timing data, and starts and stops the processing corresponding to the information data.

In addition to the configuration of the multicast receiving apparatus according to claim 1, the multicast receiving apparatus according to claim 2 includes an arithmetic processing means including storage means, and the plurality of information data includes program data for instructing processing operations of the arithmetic processing means. Each information data includes parameter data indicating a data type as at least one of the unit data, and the arithmetic processing means includes: i) the information data included in the predetermined unit data when the information data includes the program data according to the parameter data; Extracts and stores the operation start time data, the operation end time data and the program data in the storage means; ii) starts processing based on the program data in accordance with the time data and the operation start time data; Based on program data after corresponding time And stops the processing.

In addition to the configuration of the multicast receiving apparatus according to claim 2, the multicast receiving apparatus according to claim 3 further includes information data including program data, and program erasing temporary data. The corresponding program data stored in the storage means is erased in accordance with the result of comparison with the temporary data.

In addition to the configuration of the multicast reception apparatus according to claim 3, the multicast reception apparatus according to claim 4 further includes a plurality of pieces of information data including character and figure information, and the arithmetic processing means according to i) the type of data. Storing information data including the synthesized character and figure information in the storage means, and ii) erasing corresponding information data in the storage means in accordance with the erase instruction data-the erase instruction data includes information data including character and figure information; Included in the unit data having the same identification data-further comprising display means for outputting an image corresponding to the display data output from the arithmetic processing means in accordance with the information data stored in the storage means.

1 is a schematic block diagram showing a configuration of an FM multicasting receiver 100 according to the present invention.

2 is a schematic diagram showing a configuration of a data group in an FM multicast signal.

3 is a schematic diagram showing the configuration of a page data header in page data;

4 is a schematic diagram showing in detail the structure of a broadcast program management data header.

5 is a schematic diagram showing the configuration of a broadcast program management data unit.

6 is a schematic diagram illustrating an example of a configuration of a data unit header in a broadcast management data unit.

Fig. 7 is a specification diagram showing correspondence between a broadcast program control number and a function in a broadcast program management data unit.

8 is a schematic diagram showing a first configuration of segment data in a broadcast program management data unit.

9 is a schematic diagram illustrating a second configuration of segment data in a broadcast management data unit.

Fig. 10 is a flowchart showing the operation of the CPU 40 when the program start date and time and date are specified.

Fig. 11 is a schematic diagram showing a third configuration of segment data in a broadcast program management data unit.

12 is a flowchart showing the operation of the CPU 40 when the program erasing date and time are designated.

Fig. 13 is a fourth schematic diagram showing the configuration of segment data in a broadcast program management data unit.

Fig. 14 is a specification diagram showing the specification of FM multicasting;

Fig. 15 is a schematic diagram showing the configuration of broadcast program data.

Fig. 16 is a schematic block diagram showing the structure of a conventional FM multicasting receiver 10.

<Explanation of symbols for the main parts of the drawings>

10: conventional FM multicast receiver

12: antenna

14: tuner

15: FM multiple signal decode section

16: detection circuit

18: band pass filter

20: LMSK demodulation circuit

22: synchronous regeneration circuit

24: error correction circuit

30: memory

31: internal timer

32, 34: buffer circuit

36: display

38: data input terminal

40: CPU

44: Barcode Reader / Printer Device

50: speech synthesis circuit

52: speaker

54: effect sound generating circuit

100: FM multicast receiver

120: arithmetic processing unit

200: FM multicast transmitter

1 is a schematic block diagram showing a configuration of an FM multicasting receiver 100 according to an embodiment of the present invention.

The FM multicast receiver 100 receives an FM 12, an FM tuner unit 14 for receiving FM output and an FM demodulator 14, and an FM tuner unit 14 for receiving FM output. A multi-signal extraction and error correction is performed, and an FM multi-signal decoding section 15 for outputting a corresponding digital signal, a buffer circuit 32 for receiving a digital signal, and an output of the buffer circuit 32 are received. Between the CPU 40, which extracts, synthesizes, and executes information data from the data, the memory 30 that stores the information data extracted by the CPU 40, and the CPU 40. A buffer circuit 34 for performing input / output, a data display unit 36 for receiving information data output from the buffer circuit 34 and outputting a corresponding video, and a data input unit for outputting input data from the user to the CPU 40. (38).

Hereinafter, the buffer circuit 32, the CPU 40, the memory 30, and the buffer circuit 34 are collectively referred to as an arithmetic processing unit 120.

As the data display unit 36, for example, an LED display display or the like can be used, and as the data input unit 38, a keyboard or the like can be used, for example.

The FM multicast receiver 100 receives a demodulation signal from the FM tuner unit 14, receives a voice synthesis circuit 50 for performing voice synthesis of normal FM voice broadcasting, and an output of the voice synthesis circuit 50. It further includes a speaker 52 for outputting sound and an effect sound generating circuit 54 which is controlled by the CPU 40 and generates sound effects.

Therefore, unlike the conventional FM multicasting receiver 10, the FM multicasting receiver 100 not only outputs character and figure information, but also based on voice information and normal program data transmitted by normal FM broadcasting. Therefore, it is possible to simultaneously generate an effect sound corresponding to character information or the like based on the output from the CPU 40.

The FM multicast receiver 100 reads data from the card on which predetermined registration data has been recorded, outputs the data to the CPU 40, and writes character information or the like on the card in accordance with the output from the CPU 40. It further comprises a barcode reader / printer device 44.

Based on the input from the barcode reader / printer device 44, the CPU 40 operates so that only a user having a card on which predetermined registration data is recorded receives specific information data (broadcast program). It is possible to set it as possible.

Hereinafter, operations of each unit of the FM multicast reception apparatus 100 will be described in more detail.

The FM multicast signal received by the antenna 12 is synchronously detected by a local oscillation wave output from a phase locked loop (PLL) circuit in the FM demodulation circuit in the FM tuner section 14, It is output to the FM multiple signal decode unit 15.

The FM multiple signal decoder 15 receives the FM demodulated signal through a buffer circuit, extracts a signal component of a predetermined frequency region by a band pass filter, and then performs FM LMSK demodulation on the demodulated LSI to extract the FM multiple signal. .

The CPU 40 receives the output of the demodulated LSI, performs block synchronization of the received data, error correction, and the like, and outputs the packet data. At this time, if there is packet data that cannot be corrected, the data is deleted.

The information data synthesized in the CPU 40 is stored in the memory 30 as necessary.

The CPU 40 performs an operation of outputting character / shape information or the like to the display 36 according to the type of received information data, or based on program data stored in the memory 30 after reception. The process branches to the case where the process is executed.

Hereinafter, the operation of the FM multicast reception apparatus 100 of FIG. 1, in particular, the operation of the CPU 40 will be described.

Before explaining the operation of the CPU 40 in the FM multicast reception apparatus 100, the data structure of the FM multicast signal as a premise will be described in detail.

FIG. 2 is a schematic diagram showing the configuration of a data group including broadcast program management data shown in FIG.

In the configuration of the data group shown in Fig. 2, broadcast program management data is included in the data group data. The data group includes a heading start code (SOH) at its head indicating the start of the data group, followed by a data group link code which is a flag indicating whether the data group is connected, and the number of bytes of data group data. Contains data group size data indicated.

Also in succession there is data group data which is the main body of the data to be transmitted. Thereafter, there is a length adjusting NULL area for adjusting the data group length by an integer multiple of the data block, an end code indicating the end of the data group, and a CRC code for error detection of the data group.

FIG. 3 is a schematic diagram showing an example of a structure of a data group corresponding to the first broadcast program management data among the broadcast program data shown in FIG. 15 in more detail.

As described in FIG. 2, a heading start code (SOH) exists in the leading data block DBI, and data of a data group link code (DGL) and a data group size exist in subsequent data blocks DB2 and DB3. The data group link code and the data group size are called data group headers.

Subsequent to the data group header, there is a broadcast data header.

4 is a schematic diagram showing the configuration of a broadcast data header.

After the data group header, the information separator (RS) and data header parameters are continued, and data block DB (n + 2) (n = 6 in the case shown in FIG. Substantial content is disclosed. The broadcast program data header includes broadcast program number, update data indicating that broadcast program contents have been updated, the total number of pages included in the broadcast program, types of codes included in the broadcast program, and presentation function data indicating how to present the information. Information type data indicating the type of information of the broadcast program, display format data specifying the display format of the program, and the like.

Among the above data, the presentation function data included in the data block DB (n + 4) is, for example, displayed sequentially on the received information data, and is set to an operation mode (occurrence mode) in which processing is performed. After the reception of all the broadcast program data is completed, it is specified whether to set the operation mode (collective operation mode) to collectively execute the display or processing. As described later, when the information data is program data, this presentation function data is one of operation mode data indicating in what execution form the CPU 40 operates.

5 is a schematic diagram showing the configuration of a broadcast program management data unit subsequent to the broadcast program data header.

Subsequent to the broadcast unit data header and the data unit separator indicating the boundary of the broadcast program management data unit, there are data unit parameters and data unit size data indicating the size of the data unit, and thereafter, data unit data which is the main body of the data unit. Is present. In a normal broadcast program of character / shape information, a group of data units containing character or graphic data continues after the broadcast program data header in the broadcast program management data.

However, in the case of transmitting program data (binary code or the like) as information data, it has a data structure as described below for determining an operation mode based on the data received at the receiver side.

That is, first, the data unit parameter in FIG. 5 includes a parameter indicating that it is data that the user plays the game based on program data, for example, broadcast program data.

This data makes it possible to identify that the broadcast program data is data including game information.

In the following, an example will be described in the case where the content of a subsequent unit is program data for playing a game by the parameter in the data unit parameter.

6 is a schematic diagram showing the configuration of data unit data in the case where game management data is included in the data unit parameter and the data unit data subsequent to this is the game management data unit.

The data unit data is composed of several segments which have a classification code at the head for indicating which broadcast program among the broadcast channels, at the beginning.

Each segment may also specify a segment length indicating the size of the segment, a control number for controlling the operation of subsequent program data, and an operation mode such as program data sent according to the broadcast program data. It has parameter data that gives the condition of the command given according to the control number.

In other words, in the above data structure, on the basis of the presentation function data in the broadcast management data header, it is an occasional operation mode in which the received data is executed sequentially or a batch operation that executes processing after the reception of all broadcast programs is completed. The designation of the mode is made.

The operation mode of the CPU 40 is determined by the operation mode specified by the parameter successive thereto, based on the command specifying the operation mode in the broadcast program control number.

FIG. 7 is a diagram illustrating an example of a control command indicated by a broadcast program control number in the segment data shown in FIG. 6.

For example, when the control number is 01H, the operation mode is designated according to the following parameter data.

When the control number is 02H, the execution start date and time of the program are designated by the following parameter data. Therefore, after receiving the program data, the FM multicast reception apparatus 100 starts execution of the program after the start date and time specified by the timer included in the operation processing unit 120.

When the control number is 03H, the end date and time of the program is designated by the following parameter data. If a deadline is specified by this command, execution of the program of the CPU 40 is prohibited after the completion of this deadline.

When the control number is 04H, the erasing date and time of the program are specified by the following parameter data. The CPU 40 monitors the program data stored in the memory 30 at any time, and erases the program at a specified erase date and time. Therefore, for example, broadcasting of program data during the day and erasing of the program data during the night can be made by the instruction from the broadcasting station.

When the control number is 05H, a jump to another broadcast program number is specified. This command is used, for example, when executing the same program in a plurality of broadcast programs. In other words, in a broadcast program that sends program data to a single broadcast program, the broadcast program to which the program is sent can be designated by this control command.

By switching the broadcast program on the receiver side, it is possible to eliminate the waste of transmitting the same program data from each of the plurality of broadcast programs.

When the control number is 06H, the comparison information is given by the parameter data subsequent to this. That is, a comparison operator (e.g. =,>, <, etc.) and an integer are included in the parameter data, and the comparison with registration data input from the barcode reader / printer device 44 shown in FIG. It is possible to perform control. That is, on the transmission side, attribute data of the user expected to be the receiver of the information in the transmission data is designated in the parameter data included after the control number 06H. Specifically, the comparison operator and the integer value are set to predetermined values depending on whether the information is male-oriented information or female-oriented information, for example. On the receiver side, based on the data registered in the card, the CPU 40 can determine whether or not the received data matches the attribute of the receiver of the information, and perform control for selecting whether to store in the memory 30 or not. Done.

When the control number is 07H, it is a command for specifying module erasure, and the data of the module number specified by the parameter data subsequent thereto is erased from the memory 30. In other words, it becomes possible to forcibly erase data stored in the memory of the receiver from the transmitter.

In the case where the control number is 08H, the sponsor of the information type broadcast program is designated by the following parameter data. Also in this case, it becomes possible to perform control such as storing only the advertisement data from the designated sponsor in the memory 30 based on the registration data read from the card, for example.

When the control number is 09H, the valid time of the CM data is specified by the following parameter data. As a result, when advertisement data is transmitted as the information data, it is possible to control such as specifying the valid time of the advertisement.

8 is a schematic diagram showing the configuration of the segment of data unit data in the broadcast management data unit when the control number is 02H, that is, when the program start date and time are specified.

Segment length data indicating the size of the segment exists at the head of the segment, and then 02H is designated as the broadcast program control number, and date data and time data are stored as subsequent parameter data.

In this case, the date is designated, for example, by the modified Julian calendar, and it is assumed that the date is stored in the 24-hour display from 0:00.

Fig. 9 is a schematic diagram showing the configuration of segments in data unit data in the broadcast management data unit when the control number is 03H, i.e., when designation of a program deadline is made.

As in the case of the program start date and time shown in Fig. 8, segment length data indicating the size of the segment exists at the head of the segment, and then 03H is designated as the broadcast program control number, and date and time data are subsequently stored. have.

The CPU 40 on the receiver side detects that these data exist in the broadcast management data unit on the basis of the broadcast program control number, and associates the corresponding program start date and time data with the program data in memory ( 30) in memory.

10 is a flowchart for explaining the operation of the CPU 40 when a program start date and a program end date and time are designated.

In the following, for example, a user having a card on which a predetermined data is stored as registration data on the receiving side inputs the card to the barcode reader / printer device 44 and executes a quiz received by the CPU 40. It is assumed that the configuration starts the processing of the program to be performed. In other words, it is assumed that the broadcast mode allows only a user having a specific card to participate in a quiz broadcast program linked to a television broadcast.

In this case, the CPU 40 first determines whether or not a card is inserted into the barcode reader / printer device 44 (step S12).

If it is determined that the card is not inserted, the process ends as it is (step S19).

If the CPU 40 determines that the card is inserted (step S12), it judges whether or not reception of program data corresponding to the registration data stored in the card is completed (step S13).

If it is determined that the program has not been received (step S13), the card is ejected (step S19), and the operation ends (step S20).

On the other hand, when the CPU 40 determines that the reception of the program has been completed (step S13), it judges whether or not the program start date and time data is stored corresponding to the program data (step S14). If there is a start date and time data, the CPU 40 compares the time data from the internal timer 31 with the program start date and time data (step S15). If it is determined that the start date and time have not been reached, the card 40 designates the ejection of the card ( Step S19), the operation ends (step S20).

On the other hand, if it is determined that the start date and time has been reached (step S15), it is judged next whether or not the program deadline data is stored in the memory 30 in correspondence with the program data (step S16).

i) If no due date is specified.

If the CPU 40 confirms that the deadline date and time data does not exist (step S16), execution of the program data stored in the memory 30 is started (step S18).

When the execution of the program ends, the CPU 40 proposes to eject the card (step S19) and terminates the operation (step S20).

ii) when a due date is specified.

If it is determined that the deadline is specified in correspondence with the program data (step S16), the CPU 40 judges whether or not the current time is before the deadline based on the data from the internal timer 31. (Step S17).

If judged to be before the deadline, the CPU 40 executes a process corresponding to the program data (step S18). When the execution of the program ends, the CPU 40 proposes to eject the card (step S19) and terminates the operation (step S20).

On the other hand, when it is determined that the deadline has elapsed (step S17), the CPU 40 does not execute the program but proposes ejecting the card (step S19) to terminate the operation (step S20).

According to the above operation, for example, a broadcast form in which a quiz about a sports broadcast program or the like that is broadcast on the day by FM broadcast in conjunction with a TV broadcast is made in the morning and the answer is closed until a predetermined time is possible. do. In this case, for example, the answer of the listener is written on the card accepted by the barcode reader / printer 44 each time, and the result of the wrong answer is determined at the time when the answer is closed. It can be configured to write in. In other words, it is also possible to broadcast a phenomenon quiz such as providing a product by exchanging a card only to a user who has responded to the quiz question from the transmitter by the deadline.

Fig. 11 is a schematic diagram showing the configuration of one of the segments in the data unit data in the broadcast management data unit when the control number is 04H, i.e., when the program erasing date and time are specified.

Also in this case, segment length data indicating the size is included at the head of the segment, broadcast program control numbers are continuously present, and date and time are designated as subsequent parameter data.

The receiving CPU 40 receives the broadcast program data. When the broadcast program data is a program, the CPU 40 detects whether or not the segment of the control number 04H is included in the program management data unit. Is stored, the program erase date and time data is stored in the memory 30 in association with the program data.

12 is a flowchart showing the operation of the CPU 40 when the program erase date and time data is designated.

The CPU 40 detects whether there is occasional reception completed program data (step S22).

For example, the processing can be started by interrupt processing based on a trigger from the timer 31 or the like.

If it is determined that the program data does not exist (step S22), the process ends as it is (step S27).

On the other hand, if it is determined that the program data exists (step S22), it is judged whether or not the erase date / time data is recorded in the memory 30 corresponding to the program data (step S23). If it is determined that there is no designation of the erase date and time, the CPU 40 proceeds to the processing for the next program (step S26).

If the next program does not exist (step S22), the process ends (step S27).

If a program exists (step S22), it is judged again whether or not an erase date and time has been specified (step S23). If it is determined that the erasing date and time have been specified, the CPU 40 judges whether or not the current date and time is after the erasing date and time based on the time data from the internal timer 31 (step S24). If it is before the erase date and time, the process proceeds to the next program (step S26).

If it is determined that the erase date and time are later (step S24), the corresponding program is erased (step S25).

After that, whether or not the erasing date and time are specified for all programs currently stored in the memory 30 (step S23). It is judged whether or not the present point is after the erasing date (step S24).

By the above operation, it is possible to forcibly delete the program data stored in the memory 30 at the receiving side from the receiving side after the time when it becomes unnecessary for the program which has already been broadcast.

This makes it possible to effectively utilize the memory on the receiver side.

In addition, as described above, starting the processing at the designated date and time, stopping the processing at the specified date and time, and erasing the data are not limited to the case of program data, but are also applicable to display of character and figure information. Can be.

Embodiment 2

In Embodiment 1, the structure in the case of forcibly erasing unnecessary program data when the program data is transmitted from the receiving side has been described.

However, forcibly erasing the broadcast completed data from the transmitting side is not limited to the case of program data, but is also necessary for character and figure information, for example.

Fig. 13 is a schematic diagram showing the configuration of one of the segments in the data unit data in the broadcast management data when the control number is 07H, i.e., when the module erasure is designated.

The segment data also includes segment length data indicating the size of the segment and includes 07H for designating module erasure as the broadcast program control number. Subsequently, a module number instructing erasure exists as parameter data.

On the receiver side, when the CPU 40 detects that a segment having the control number 07H exists in the data unit data in the received broadcast program management data, it is determined whether the information data belonging to the same broadcast program number is stored in the memory 30. Check whether or not.

When the broadcast program data designated by the same broadcast program number is stored in the memory 30, the module designated by the module number included in the segment is deleted from the memory 30.

In that case, for example, when the module number is 00H, it is also possible to have a configuration for erasing all modules.

Here, the module indicates a sending unit that is sent out in one transmission, for example.

Thus, for example, in the case of a foreign exchange information broadcast program, all foreign exchange data at a specific time transmitted by one transmission is shown.

Therefore, it is possible to forcibly erase the foreign exchange data of the predetermined time stored in the memory 30 from the transmitter side on the receiver side.

Note that the above erasing operation is not limited to the foreign exchange information broadcast program and the like, and can be applied to other character and figure information such as advertisement information, for example.

With the above configuration, when program data is transmitted by FM multicasting or the like, the receiver side transmits the date and time for starting the processing corresponding to the program data, the date and time for finishing the operation, and the date and time for erasing the program data. It becomes possible to set from the side.

Therefore, for example, it becomes possible to broadcast a listener participation type quiz broadcast program with a limited response time.

In addition, it is also possible to forcibly delete broadcast completed data from the transmitter side even for broadcast program data containing normal character and figure information.

From the receiver side, it is possible to forcibly erase the transmission completed data as described above, thereby making it possible to effectively use the memory on the reception side, and to prevent the overflow of the memory and the like.

Claims (4)

In a multi-communication system in which each of a plurality of information data to be transmitted is divided into a plurality of unit data and transmitted, each of the unit data receives a transmission data including information data to which the information belongs and identification data indicating a position in the information data. As a receiving device, Demodulation means for receiving and demodulating a carrier wave for transmitting the unit data by multiplex transmission; Multi-signal decoding means for receiving the output of the demodulation means and extracting the multi-signal and outputting it as a corresponding digital signal; Time means for outputting time data indicating the current date and time, Arithmetic processing means for receiving the output of the multi-signal decoding means and synthesizing the information data according to the identification data; Including, The calculation processing means, And extracting operation start date and time data included in the information data, and starting and stopping a process corresponding to the information data in accordance with a comparison result with the time data. The method according to claim 1, wherein said arithmetic processing means comprises storage means, The plurality of information data includes program data instructing a processing operation of the arithmetic processing means, Each of the information data includes parameter data indicating a type of data as at least one of the unit data, The calculation processing means, i) when the information data includes program data according to the parameter data, extracting the operation start time data, the operation end time data, and the program data included in predetermined unit data, and storing them in the storage means; ii) start processing based on the program data in accordance with the time data and the operation start time data; and iii) stop processing based on the program data after a corresponding time in accordance with the operation end date and time data. The method of claim 2, wherein the information data including the program data further comprises program erase date and time data, And said arithmetic processing means erases said corresponding program data stored in said storage means in accordance with a comparison result of said time data and said program erase date and time data. The method of claim 3, wherein the plurality of pieces of information data further includes character and figure information. The calculation processing means, i) storing the information data including the synthesized character and figure information in the storage means according to the type of the data; ii) erasing corresponding information data in the storage means in accordance with the erasure instruction data; Display means for outputting an image corresponding to display data output from said calculation processing means in accordance with the information data stored in said storage means, And the erasing instruction data is included in the unit data having the same identification data as the information data including the character and figure information.