JP5229467B2 - Broadcast receiving system, broadcast receiving method and broadcast receiver - Google Patents

Description

  The present invention relates to a data receiver and a data receiving system, for example, a movable broadcast receiver suitable for receiving broadcast data, a broadcast receiving system using the same, and a broadcast receiving method.

  In a movable data receiver, for example, a movable broadcast receiver that receives broadcast waves (broadcast data), the reception environment is unstable for the following reasons. That is, since this type of broadcast receiver receives a broadcast wave from a broadcast station while moving, the surrounding broadcast wave environment changes every moment. In addition, it is difficult for this type of broadcast receiver to continue to fix the antenna in an optimum direction like a fixed broadcast receiver. If the reception environment is unstable, the reception rate deteriorates and the reception quality is lowered.

  In order to improve the degradation of reception quality due to an unstable reception environment, conventionally, a broadcast receiver is provided with a plurality of antennas, receives broadcast waves with these multiple antennas, and combines the received multiple broadcast waves, Alternatively, a method (first method) has been proposed in which a broadcast wave having a better reception state is selected from a plurality of received broadcast waves and used.

  Further, in Patent Document 1, as a digital broadcasting system, broadcast data is received and recorded, the presence / absence of an error is determined for the recorded broadcast data, and if an error is detected, the broadcast data of the location where the error has occurred is recorded. A method (second method) for obtaining and complementing from a program server is disclosed.

  Further, Patent Document 2 discloses the following method (third method) as a digital broadcast receiver system capable of complementing errors in recorded data of a digital broadcast signal. Each of the two receivers includes a recorded data storage unit that records the received digital broadcast signal as recorded data. In each receiver, the error information recording unit stores error information for specifying an error portion (missing data) in the recorded data. An error portion of the recorded data in each receiver is specified based on each error information, and normal data corresponding to the error portion is transmitted and received between the receivers, whereby the error portion of each recorded data is complemented.

JP 2001-298725 A JP 2007-43446 A

  In the first method, generally, the smaller the broadcast receiver, the smaller the distance between the antennas and the smaller the difference between the received broadcast waves, so the effect of improving the reception quality becomes smaller.

  On the other hand, in the case of the second method, it is necessary to install and operate a program server having correct broadcast data in the digital broadcast system.

  In the third method, when there is an error in the recorded data recorded by one receiver, it is necessary to send error information to the other receiver and request data necessary for complementation.

  An object of the present invention is to enable error correction included in received data to be implemented by a method as simple as possible.

  According to the first aspect of the present invention, wireless transmission and reception of data is performed between a broadcast receiving unit that receives broadcast data transmitted from a broadcasting station and another broadcast receiver that includes a wireless communication unit. A communication unit, a broadcast data received by the broadcast receiver, a data storage unit for storing broadcast data transmitted from the other broadcast receiver and received by the wireless communication unit, the broadcast receiver, and the wireless communication unit A control unit for controlling the broadcast data received by the broadcast receiving unit from the wireless communication unit, the received broadcast data received by the own broadcast receiver, and the other broadcasts. Compared with other-device transmission broadcast data transmitted from the receiver and received by the wireless communication unit, the presence / absence of an error portion in the own-device reception broadcast data is detected, and when the error portion is detected, the other-device transmission broadcast data Broadcast receiver characterized in that it complements the error portion is provided utilizing.

  According to the second aspect of the present invention, it includes a plurality of broadcast receivers that receive broadcast data transmitted from a broadcast station, each broadcast receiver including a broadcast receiver that receives the broadcast data, and the plurality of broadcast receivers A wireless communication unit that transmits and receives data to and from at least one other broadcast receiver in the broadcast receiver, broadcast data received by the broadcast receiver, and from the at least one other broadcast receiver A data storage unit for storing broadcast data transmitted and received by the wireless communication unit, a broadcast reception unit, and a control unit for controlling the wireless communication unit, wherein the control unit is a broadcast received by the broadcast reception unit. The data is transmitted from the wireless communication unit, and the received broadcast data received by the own broadcast receiver and the other device transmission release transmitted from the at least one other broadcast receiver and received by the wireless communication unit. A broadcast characterized by detecting the presence or absence of an error portion in the broadcast data received by the own device by comparing with data, and supplementing the error portion using the broadcast data transmitted from the other device when the error portion is detected A receiving system is provided.

  In addition, at least one broadcast receiver in the plurality of broadcast receivers is used as the at least one other broadcast receiver for complementing the error portion with one fixed broadcast receiver. The data may be transmitted and received. Alternatively, at least one broadcast receiver in the plurality of broadcast receivers receives broadcast data from the plurality of other broadcast receivers by the wireless communication unit, and is in a reception state from the received plurality of broadcast data Better broadcast data or broadcast data from a broadcast receiver with good wireless communication state may be used for complementation. Further, the control unit of at least one broadcast receiver in the plurality of broadcast receivers complements the error part in place of a control operation for transmitting broadcast data received by the broadcast receiving unit from the wireless communication unit. A control operation for transmitting the complemented broadcast data obtained by the control operation from the wireless communication unit may be executed.

  According to the third aspect of the present invention, in a broadcast receiving method in which broadcast data transmitted from a broadcast station is received by a plurality of broadcast receivers, each broadcast receiver receives broadcast data from the broadcast station. The broadcast receiver transmits / receives data to / from at least one other broadcast receiver of the plurality of broadcast receivers, and each broadcast receiver also receives the broadcast data from the broadcast station, the at least one broadcast receiver. The broadcast data transmitted from other broadcast receivers are received and stored in the respective data storage units, and each broadcast receiver further transmits the received broadcast data from the broadcast station and the own broadcast receiver. Received by the receiver and stored in the data storage unit, and broadcast data transmitted from the at least one other broadcast receiver, and stored in the data storage unit. And detecting the presence or absence of an error portion in the broadcast data received by the own device, and supplementing the error portion by using the broadcast data transmitted from the other device when the error portion is detected. Is provided.

  According to the fourth aspect of the present invention, a radio communication unit that transmits and receives data between a reception unit that receives data transmitted from the main station and another data receiver that includes the radio communication unit. A data storage unit that stores data received by the reception unit, data transmitted from the other data receiver and received by the wireless communication unit, and a control unit that controls the reception unit and the wireless communication unit. The control unit causes the data received by the receiving unit to be transmitted from the wireless communication unit, and is received by the own data receiver and received from the other data receiver and transmitted from the other data receiver. The presence of an error part in the reception data of the own device is detected by comparing with the other device transmission data received in the above, and when the error part is detected, the error part is supplemented using the other device transmission data. Feature Data receiver is provided.

  In the above data receiver, as the other data receiver, transmission and reception of data for complementing the error part may be performed with one fixed data receiver. , Receiving data from the plurality of other data receivers by the wireless communication unit, and receiving data from a plurality of types of received data having better reception state or data from a data receiver having good wireless communication state May be used for completion. In addition, the control unit in the data receiver replaces the data received by the receiving unit from the wireless communication unit, instead of the supplemented data obtained by the control operation that complements the error part. A control operation to be transmitted from the wireless communication unit may be executed.

  According to a fifth aspect of the present invention, the data receiver includes a plurality of data receivers that receive data transmitted from the main station, and each data receiver receives a data transmitted from the main station; A wireless communication unit for transmitting and receiving data to and from at least one other data receiver in the plurality of data receivers; data received by the receiving unit; and at least one other data receiver A data accumulating unit that accumulates data transmitted from and received by the wireless communication unit, a receiving unit, and a control unit that controls the wireless communication unit, wherein the control unit receives the data received by the receiving unit While transmitting from the wireless communication unit, the own device received data received by the own data receiver is compared with the other device transmission data transmitted from the at least one other data receiver and received by the wireless communication unit. Thus, there is provided a data receiving system characterized by detecting the presence or absence of an error part in the received data of the own apparatus and supplementing the error part using the other apparatus transmission data when the error part is detected. .

  Also in the present data receiving system, at least one data receiver in the plurality of data receivers may be in error with one fixed data receiver as the at least one other data receiver. Data may be transmitted and received for complementing the portion, and at least one data receiver in the plurality of data receivers may be transmitted from the plurality of other data receivers by the wireless communication unit. The data may be received, and data having a better reception state from among the plurality of received data or data from a data receiver having a good wireless communication state may be used for complementation. Further, the control unit of at least one data receiver in the plurality of data receivers replaces the control operation for transmitting the data received by the receiving unit from the wireless communication unit, and complements the error part. You may make it perform the control operation | movement which transmits the complemented data obtained by operation | movement from the said radio | wireless communication part.

  According to the broadcast receiver of the present invention, the broadcast data obtained by receiving the broadcast data transmitted from the broadcast station by the broadcast receiving unit is received by another broadcast receiver having the same configuration and transmitted from the wireless communication unit. By supplementing with the broadcast data that has been received, even if there is an error in the broadcast data received by the broadcast receiver, the error part is complemented without exchanging error information with other broadcast receivers. As a result, the reception rate of broadcast data can be increased, and the reception quality can be improved.

  The same applies to the data receiver. In other words, by complementing the data obtained by receiving the data transmitted from the main station with the data received by another data receiver having the same configuration and transmitted from the wireless communication unit, Even if there is an error in the data received by the receiver, the error part can be complemented without exchanging error information with other data receivers, and the data reception rate can be increased. Can be increased.

  FIG. 1 is a block diagram showing a configuration example when the present invention is applied to a broadcast receiver.

  The broadcast receiver 10 in this example includes a wireless communication unit 17 in addition to the broadcast reception unit 11 and the control unit 12. The broadcast receiving unit 11 receives broadcast data (broadcast wave or broadcast signal) from a broadcast station, and receives and demodulates broadcast data having a frequency corresponding to the channel designated by the control unit 12. The control unit 12 performs overall control processing in the broadcast receiver 10 such as reception control, decoding of received data (video, audio, etc.), display control, and the like. The reception data output from the broadcast reception unit 11 is taken into the reception data storage unit 16 via the control unit 12 and then decoded into video, audio, etc. by the control unit 12. Is presented to the voice presentation unit 15. Speaking of broadcast reception, the key input unit 13 is a part that receives instructions regarding broadcast reception from the user, such as channel setting, and the input information is input to the control unit 12, and reception control and display control by the control unit 12 are performed. Used for The wireless communication unit 17 performs wireless communication with another broadcast receiver including the same wireless communication unit as the wireless communication unit in the broadcast receiver.

  FIG. 2 shows the flow of received data in a broadcast receiving method implemented using the broadcast receiver according to the present invention.

  In the broadcast receiving method according to the present invention, at least two broadcast receivers 10 having the configuration described in FIG. 1 are used. FIG. 2 shows two examples, which are broadcast receiver A and broadcast receiver B, respectively.

  In the broadcast receiver A and the broadcast receiver B, the broadcast data from the broadcast station is received by the broadcast receiver 11 and temporarily stored in the received data storage unit 16 via the control unit 12. The broadcast data received by the broadcast receiving unit 11 is transmitted from the wireless communication unit 17 via the control unit 12. At the same time, the wireless communication unit 17 receives broadcast data received and wirelessly transmitted by another broadcast receiver, and stores it in the received data storage unit 16 via the control unit 12.

Hereinafter, the case of the broadcast receiver A will be described. The control unit 12 receives broadcast data received by the own broadcast receiver (that is, broadcast receiver A) from the received data storage unit 16 (hereinafter, may be referred to as own device received broadcast data), and other broadcast receivers. (That is, broadcast data received by the broadcast receiver B, transmitted wirelessly and received by the wireless communication unit 17 (hereinafter, referred to as “other-device transmission broadcast data”) is read and compared, and the received broadcast data is transmitted to the own device. the missing parts component (hereinafter collectively referred to as the error part) to determine if there is. When there is an error part in the received broadcast data of the own device, the control unit 12 supplements the error part of the received broadcast data of the own device using the transmitted broadcast data of the other device. The control unit 12 decodes the broadcast data supplemented in this way, displays video on the display unit 14, and presents audio on the audio presentation unit 15.

  With the configuration and operation as described above, broadcast data received by other broadcast receivers and transmitted wirelessly, that is, broadcast data transmitted by other devices can be used. Therefore, broadcast data received by the own broadcast receiver, that is, own device Even if there is an error in the received broadcast data, it is possible to increase the reception rate of the broadcast data by complementing the error part without exchanging error information with other broadcast receivers. Can be increased.

  The above description is an example in which broadcast data is exchanged between two broadcast receivers, that is, one to one, but it is not necessary to be one to one. In the case of three or more units, the broadcast data transmitted from the wireless communication unit of a certain broadcast receiver may be fixed to the destination broadcast receiver (wireless communication unit), but any broadcast receiver (wireless communication unit) It may be in a form that can be received. In other words, the broadcast data received by the radio communication unit need not be limited to the broadcast data transmitted from the radio communication unit of another fixed broadcast receiver, but from each radio communication unit of the plurality of broadcast receivers. You may receive the broadcast data transmitted.

  The above example is shown in FIG. FIG. 3 shows an example in which broadcast data from the broadcast station BBS is received by four broadcast receivers A to D. The broadcast receiver B receives and uses only broadcast data from the broadcast receiver A, and the broadcast receiver D receives and uses only broadcast data from the broadcast receiver B. That is, the broadcast receiver of the transmission destination is fixed. On the other hand, the broadcast receiver C receives broadcast data from at least one of the broadcast receivers A, B, and D other than its own, in this case, the broadcast receivers A, B, and D.

Note that the plurality of broadcast data being transmitted from the wireless communication unit of the plurality of broadcast receivers, better broadcast data reception state of the plurality of broadcast data from a plurality of broadcast receivers or radio communication state It is used to broadcast data from the good broadcast receiver of not good.

  The broadcast data is selected from the broadcast data transmitted from each broadcast receiver through the wireless communication unit, such as broadcast information (channel information, etc.) being received and broadcast reception status information (BER, C / N). Etc.) is transmitted wirelessly, and this information is extracted from the received broadcast data.

  The same applies to the case of the data receiver described later.

  On the other hand, when a plurality of broadcast receivers shown in FIG. 3 have a configuration such as a wireless LAN, one or more broadcast receivers that use the broadcast data transmitted from the wireless communication unit are used. A method of selecting a broadcast receiver that receives the same broadcast data from among the fixed broadcast receivers, and a broadcast receiver that receives the same broadcast from the surrounding broadcast receivers. There is a way to choose the machine. As described above, when there are a plurality of broadcast receivers receiving the same broadcast, all broadcast data from the plurality of broadcast receivers may be used, or from a plurality of broadcast receivers. Among the plurality of broadcast data, broadcast data having a better reception state or broadcast data from a broadcast receiver having a good wireless communication state may be used. The broadcast receiver is selected from the broadcast data transmitted from each broadcast receiver through the wireless communication unit in addition to the broadcast receiver ID information (channel information, etc.) The reception status information (BER, C / N, etc.) is added and transmitted wirelessly, and this information is extracted from the received broadcast data. Of course, if the reception state or communication state is changed after the broadcast receiver is selected once, another broadcast receiver may be selected again.

  In addition, as shown in FIG. 4, the broadcast data received by the broadcast receiving unit is not immediately transmitted from the wireless communication unit 17 via the control unit 12 as it is, but the other-unit transmission broadcast data received by the wireless communication unit 17 is not transmitted. The complemented broadcast data obtained as a result of using and complementing may be transmitted from the wireless communication unit 17.

  Further, as described in FIG. 3, when receiving broadcast data from a broadcasting station by three or more broadcast receivers, at least one broadcast receiver has a wireless communication unit 17 as shown in FIG. The supplementary operation using the broadcast data transmitted from the other device received through the wireless communication unit 17 may be performed without transmitting the transmitted broadcast data. Alternatively, as shown in FIG. 6, at least one broadcast receiver wirelessly communicates broadcast data received through the broadcast receiving unit 11 via the control unit 12 without performing a supplementary operation using broadcast data transmitted from other devices. The operation of transmitting from the unit 17 may be performed.

  The case where the present invention is applied to a broadcast receiver has been described above, but the present invention is not limited to a broadcast receiver and can be applied to a data receiver in general. In this case, referring to FIG. 3, broadcast receivers A to D serve as data receivers, and broadcast station BBS serves as a main station that transmits data to each data receiver. The configuration and function of each data receiver is the same as that shown in FIG. 1, except that the broadcast receiving unit 11 is a data receiving unit from the main station and does not require tuning control in the data receiving unit. 2 and FIGS. 4 to 6 are the same as the broadcast receivers described above.

  The present invention is also applicable to either analog or digital.

FIG. 1 is a block diagram showing a configuration example when the present invention is applied to a broadcast receiver. FIG. 2 is a diagram for explaining the operation of the embodiment together with the signal flow when the broadcast data is complemented by the two broadcast receivers shown in FIG. FIG. 3 is a diagram for explaining the operation when the broadcast data is complemented by three or more broadcast receivers shown in FIG. FIG. 4 is a diagram for explaining another mode of operation when broadcast data is transmitted from the wireless communication unit by the broadcast receiver shown in FIG. FIG. 5 is a diagram for explaining an operation mode of the broadcast receiver shown in FIG. FIG. 6 is a diagram for explaining another mode of operation of the broadcast receiver shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Broadcast receiver 11 Broadcast receiving part 12 Control part 13 Key input part 14 Display part 15 Audio | voice presentation part 16 Received data storage part 17 Wireless communication part

Claims (20)

A broadcast receiver for receiving broadcast data transmitted from a broadcast station;
A wireless communication unit for transmitting and receiving data to and from other broadcast receivers equipped with a wireless communication unit;
Broadcast data received by the broadcast receiver, data storage units for storing broadcast data transmitted from the other broadcast receivers and received by the wireless communication unit, and
A control unit for controlling the broadcast receiving unit and the wireless communication unit;
The control unit causes the broadcast data received by the broadcast receiving unit to be transmitted from the wireless communication unit, and the received broadcast data received by the own broadcast receiver and the wireless communication transmitted from the other broadcast receiver. Great have been missing portion by comparing the other transmitter broadcast data received own apparatus receives broadcast data to detect the presence or absence of that an error portion in part, the other transmitter broadcast data when detecting the error part A broadcast receiver characterized in that the error part is complemented by using a receiver.   2. The broadcast receiver according to claim 1, wherein as another broadcast receiver, data for complementing the error portion is transmitted to and received from one fixed broadcast receiver. .   Broadcast data from the plurality of other broadcast receivers is received by the wireless communication unit, broadcast data in a better reception state from the received plurality of broadcast data, or from a broadcast receiver in a good wireless communication state The broadcast receiver according to claim 1, wherein broadcast data is used for complementation.   The control unit replaces the broadcast data received by the broadcast reception unit from the wireless communication unit, and transmits the complemented broadcast data obtained by the control operation to complement the error part to the wireless communication unit. The broadcast receiver according to claim 1, wherein a control operation for transmitting from the broadcast is executed. Including a plurality of broadcast receivers for receiving broadcast data transmitted from a broadcasting station;
Each broadcast receiver
A broadcast receiving unit for receiving the broadcast data;
A wireless communication unit for transmitting and receiving data with at least one other broadcast receiver in the plurality of broadcast receivers;
Broadcast data received by the broadcast receiving unit, data storage units for storing broadcast data transmitted from the at least one other broadcast receiver and received by the wireless communication unit, and
A control unit for controlling the broadcast receiving unit and the wireless communication unit;
The control unit causes the broadcast data received by the broadcast receiving unit to be transmitted from the wireless communication unit, and is transmitted from the own device received broadcast data received by the own broadcast receiver and the at least one other broadcast receiver. by detecting the presence or absence of that the radio by comparing the received other transmitter broadcast data by the communication unit insufficient to have you in the multifunction peripheral receives broadcast data portion as an error portion, the other when detecting the error part A broadcast receiving system characterized in that the error portion is complemented by using machine-transmitted broadcast data.   At least one broadcast receiver in the plurality of broadcast receivers, as the at least one other broadcast receiver, is a data for complementing the error part with one fixed broadcast receiver. The broadcast receiving system according to claim 5, wherein transmission and reception are performed.   At least one broadcast receiver in the plurality of broadcast receivers receives broadcast data from the plurality of other broadcast receivers by the wireless communication unit, and the reception state is selected from the received plurality of broadcast data. 6. The broadcast receiving system according to claim 5, wherein good broadcast data or broadcast data from a broadcast receiver having a good wireless communication state is used for complementation.   The control unit of at least one broadcast receiver in the plurality of broadcast receivers replaces the control operation for transmitting the broadcast data received by the broadcast receiving unit from the wireless communication unit, and complements the error part. 8. The broadcast receiving system according to claim 5, wherein a control operation for transmitting the complemented broadcast data obtained by the operation from the wireless communication unit is executed. In a broadcast receiving method for receiving broadcast data transmitted from a broadcast station by a plurality of broadcast receivers,
Each broadcast receiver receives broadcast data from the broadcast station, while transmitting and receiving data with at least one other broadcast receiver in the plurality of broadcast receivers,
Each broadcast receiver also receives the received broadcast data from the broadcast station, the broadcast data transmitted from the at least one other broadcast receiver, and stores them in the data storage unit,
Each broadcast receiver further transmits the received broadcast data from the broadcast station, and receives the broadcast data received by the own broadcast receiver and stored in the data storage unit, and the at least one other broadcast data detecting the presence or absence of that the missing parts to have contact receives broadcast data transmitted by comparing the other transmitter broadcast data stored in the data storage unit in the multifunction peripheral receives broadcast data as an error portion from the broadcast receiver A broadcast receiving method characterized in that when an error part is detected, the error part is complemented using the broadcast data transmitted from the other device.   At least one broadcast receiver in the plurality of broadcast receivers, as the at least one other broadcast receiver, is a data for complementing the error part with one fixed broadcast receiver. The broadcast receiving method according to claim 9, wherein transmission and reception are performed.   At least one broadcast receiver in the plurality of broadcast receivers receives broadcast data from the plurality of other broadcast receivers, and broadcast data in a better reception state from the received plurality of broadcast data, or 10. The broadcast receiving method according to claim 9, wherein broadcast data from a broadcast receiver having a good wireless communication state is used for complementation.   The at least one broadcast receiver in the plurality of broadcast receivers is complemented broadcast data obtained by an operation of complementing the error portion instead of an operation of transmitting the received broadcast data from the broadcast station. The broadcast receiving method according to claim 9 or 11, wherein an operation of transmitting the message is executed. A receiving unit for receiving data transmitted from the main station;
A wireless communication unit for transmitting and receiving data to and from other data receivers equipped with a wireless communication unit;
A data accumulating unit for accumulating data received by the receiving unit, data transmitted from the other data receiver and received by the wireless communication unit;
A control unit for controlling the receiving unit and the wireless communication unit;
The control unit causes the data received by the receiving unit to be transmitted from the wireless communication unit, and also receives own data received by the own data receiver and received from the other data receiver and received by the wireless communication unit. the error was by comparing the other transmitter data parts missing and have contact to the own apparatus received data to detect the presence or absence of that an error moiety, when it detects an error part using the other transmitter data A data receiver characterized by complementing parts.   14. The data receiver according to claim 13, wherein as the other data receiver, data for complementing the error portion is transmitted to and received from a fixed one data receiver. .   The wireless communication unit receives data from a plurality of other data receivers, and receives data from a plurality of types of received data with better reception state or data from a data receiver with good wireless communication state. The data receiver according to claim 13, wherein the data receiver is used for complementation.   The control unit causes the wireless communication unit to transmit the complemented data obtained by the control operation for complementing the error portion, instead of the control operation for transmitting the data received by the reception unit from the wireless communication unit. 16. The data receiver according to claim 13, wherein a control operation is executed. Including a plurality of data receivers for receiving data transmitted from the main station;
Each data receiver
A receiving unit for receiving data transmitted from the main station;
A wireless communication unit for transmitting and receiving data to and from at least one other data receiver in the plurality of data receivers;
A data accumulating unit for accumulating data received by the receiving unit, data transmitted from the at least one other data receiver and received by the wireless communication unit, respectively;
A control unit for controlling the receiving unit and the wireless communication unit;
The control unit causes the data received by the receiving unit to be transmitted from the wireless communication unit, and is also transmitted from the own device received data received by the own data receiver and the at least one other data receiver. the portion by comparing the other transmitter data received by the communication unit insufficient to have you in the multifunction peripheral receives data to detect the presence or absence of that an error part, using the other transmitter data when detecting the error part A data receiving system characterized in that the error part is complemented.   At least one data receiver in the plurality of data receivers is data for complementing the error part with the fixed data receiver as the at least one other data receiver. 18. The data receiving system according to claim 17, wherein transmission and reception are performed.   At least one data receiver in the plurality of data receivers receives data from the plurality of other data receivers by the wireless communication unit, and data having a better reception state among the plurality of received data The data receiving system according to claim 17, wherein data from a data receiver having a good wireless communication state is used for complementation.   The control unit of at least one data receiver in the plurality of data receivers performs a control operation for complementing the error part instead of a control operation for transmitting data received by the receiving unit from the wireless communication unit. The data receiving system according to claim 17 or 19, wherein a control operation for transmitting the obtained supplemented data from the wireless communication unit is executed.

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