JP2008283390A - Receiving apparatus, transfer method of content data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transfer content data certainly to an accumulation apparatus connected to a network. <P>SOLUTION: A receiving apparatus 3 comprises a tuner portion 12 for receiving broadcast waves and acquiring copyright-protected content data, a network interface portion 16 connected to an accumulation apparatus through a network, a data storage portion 22 for storing in order the content data acquired by the tuner portion, and a transfer processing portion 14. The transfer processing portion 14 transfers in order the content data acquired by the tuner portion to the accumulation apparatus through the network. If content transfer fails, the transfer processing portion 14 transfers the content data stored in the data storage portion to the accumulation apparatus through the network. If the content data transfer to the accumulation apparatus finishes, the transfer processing portion 14 deletes the content data stored in the data storage portion, while it transmits a validation instruction for content data validation to the accumulation apparatus. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a receiving device that receives broadcast waves, and a content data transfer method.

A conventional document (Patent Document 1) shows a recording / playback apparatus. The recording / playback apparatus according to this conventional document records the program data received by the tuner in parallel with the hard disk and the magnetic tape, and deletes the program data from the hard disk after the recording ends. The recording process of the recording / playback apparatus according to the conventional document is a process performed in one apparatus, and is not a process between a plurality of devices connected via a network.
JP 2002-230900 A

  In recent years, home networks have been built. The home network includes a home TV, HDD recorder (HDD: Hard Disk Drive built-in video recording device), DVD recorder (DVD: DVD) via a network such as Ethernet (registered trademark) or wireless LAN (Local Area Network). A device having a video data and audio data reproduction or recording function, such as a digital versatile disk (video recording device having a digital data recording function), is connected to each other in accordance with technical specifications such as UPnP.

  When a plurality of AV devices are connected via a network, the network may not provide a stable communication environment. For this reason, when content data is transferred from the receiving device receiving the broadcast to the storage device via the network, the content data may be divided during transfer or the content data may be lost. Can do. In particular, when the content data is copyright-protected, it is difficult to repair the content data that has been divided or lost.

  SUMMARY An advantage of some aspects of the invention is to provide a receiving device and a content data transfer method capable of reliably transferring content data to a storage device connected to a network.

  In order to achieve the above-described object, a receiving device according to the present invention is connected to a tuner unit that receives broadcast waves and obtains content data subjected to copyright protection processing, and a storage device via a network. Network interface unit, data storage unit that sequentially stores the content data acquired by the tuner unit, and content data acquired by the tuner unit are sequentially transferred to the storage device via the network, and the data is transferred when the transfer fails. A transfer processing unit that transfers the content data stored in the storage unit to the storage device via the network, and the transfer processing unit permits the validation of the content data when the content data has been transferred to the storage device The activation command is transmitted to the storage device and the content data stored in the data storage unit is deleted. The features.

  The content data transfer method according to the present invention is a method in which a receiving device that has received a broadcast wave and has acquired content data subjected to copyright protection processing transfers the acquired content data to a storage device via a network. The content data acquired when the receiving device receives the broadcast wave is sequentially stored in the data storage unit of the receiving device, and the content data acquired when the receiving device receives the broadcast wave is transmitted via the network. When the transfer fails, the content data stored in the data storage unit is transferred to the storage device via the network, and when the content data is transferred to the storage device, the content data is valid. Content data stored in the data storage unit, as well as sending an enabling command to allow It is a method of transferring content data to be deleted.

  According to the present invention, it is possible to provide a receiving device and a content data transfer method capable of reliably transferring content data to a storage device connected to a network.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  FIG. 1 shows a home network 1 according to an embodiment of the present invention. The home network 1 is configured by a network such as Ethernet (registered trademark) or a wireless LAN. The home network 1 includes a broadcast receiving device 10 and a temporary storage device 20 as a receiving device 3 for receiving a television broadcast. The home network 1 also includes a content storage device 30 as a storage device 5 for storing content data. The broadcast receiving device 10 and the content storage device 30 are connected to each other via the network 7. On the other hand, the broadcast receiving device 10 and the temporary storage device 20 are connected to each other via a dedicated connection line 24 that provides a stable communication environment.

  The broadcast receiving apparatus 10 receives a broadcast wave such as terrestrial broadcast, BS (Broadcasting Satellite) broadcast, CS (Communication Satellite) broadcast, etc., and extracts and acquires content data (program data) from the broadcast wave. And a transfer processing unit 14 that transfers the content data to other devices via the network, and a network interface unit 16 that connects the broadcast receiving apparatus 10 to the network 7. The temporary storage device 20 includes a data storage unit 22 including a storage medium such as a hard disk or a DVD (Digital Versatile Disc). The data storage unit 22 has a function of writing digital data to the storage medium and a function of reading digital data from the storage medium. In the present embodiment, the data storage unit 22 is provided outside the broadcast receiving device 10. However, in other embodiments, the data storage unit 22 may be provided inside the broadcast receiving device 10.

  The content storage device 30 includes a data storage unit 32 including a storage medium such as a hard disk or a DVD (Digital Versatile Disk). The data storage unit 32 has a function of writing digital data to the storage medium and a function of reading digital data from the storage medium. In addition, the content storage device 30 includes a transfer reception unit 34 that receives content data transferred from the broadcast reception device 10, and a network interface unit 36 that connects the broadcast reception device 10 to the network 7. When the transfer receiving unit 34 takes in the content data transferred from the broadcast receiving device 10 via the network 7, the transfer receiving unit 34 stores the content data in the data storage unit 32. The data storage unit 32 stores and stores a large number of content data.

  In the present embodiment, the content data transferred from the broadcast receiving device 10 to the content storage device 30 includes data that has been subjected to copyright protection processing such as DTCP (Digital Transmission Content Protection). By performing copyright protection processing on the content data, unauthorized copying of the content data is prevented. That is, when the content data has been subjected to copyright protection processing, a plurality of content data cannot be saved in an activated state, and only one content data is saved in an activated state. It becomes possible.

  Next, content data transfer processing by the broadcast receiving apparatus 10 will be described with reference to FIG. The content data transfer process is realized by the broadcast receiving apparatus 10 executing a data transfer program.

  The tuner unit 12 of the broadcast receiving apparatus 10 receives a broadcast wave of a television broadcast, starts extracting content data from the broadcast wave and capturing it (S201). At the same time, the broadcast receiving apparatus 10 starts to store the captured content data in the data storage unit 22 of the temporary storage device 20 in real time (S202, see FIG. 4). The content data is stored in the data storage unit 22 of the temporary storage device 20 in a state invalidated by the copyright protection function (in other words, in a state where it cannot be reproduced as it is).

  Next, the transfer processing unit 14 confirms whether or not the content data can be transferred to the content storage device 30 (S203). Here, the situation in which the content data cannot be transferred is, for example, (1) when the content storage device 30 is not connected to the network, (2) when the content storage device 30 is processing data and is busy, 3) For example, when the network is used for data transfer between other devices. The transfer processing unit 14 proceeds to the process of step 204 when the content data can be transferred to the content storage device 30. On the other hand, when the content data cannot be transferred to the content storage device 30, the transfer processing unit 14 repeats the determination process in step 203 and waits until the content data can be transferred to the content storage device 30.

  If the process proceeds from step 203 to step 204, the transfer processing unit 14 starts real-time transfer of content data (S204). The broadcast receiving device 10 sequentially transfers the content data D1 to the content storage device 30 via the network 7 and also sequentially transfers the content data D2 to the temporary storage device 20 via the dedicated line 24. The content data is stored in the storage unit 22 (see FIG. 4). In the present embodiment, since the broadcast receiving apparatus 10 receives content data and transfers content data at the same time, transfer of content data is compared with the case where content data is transferred after the reception of content data is completed. The procedure can be simplified and the time required for transferring the content data can be remarkably shortened.

  Thereafter, the transfer processing unit 14 determines whether or not the transfer of the content data to the content storage device 30 has been completed (S205). If the transfer processing unit 14 determines that the transfer of the content data has ended, the transfer processing unit 14 proceeds to the process of step 206. On the other hand, when the transfer processing unit 14 determines that the transfer of the content data has not been completed, the transfer processing unit 14 repeats the determination process in step 205 and continues to transfer the content data for which the transfer of the content data is completed.

  When the process proceeds from step 205 to step 206, the transfer processing unit 14 has received transfer completion information S1 (see FIG. 5) from the content storage device 30 as a transfer destination during a preset time. Is determined (S206). If the transfer processing unit 14 determines that the transfer completion information has been received, the transfer processing unit 14 proceeds to the process of step 207. On the other hand, if it is determined that the transfer completion information is not accepted, the transfer processing unit 14 proceeds to the process of step 209.

  When the processing proceeds from step 206 to step 207, the transfer processing unit 14 transmits a deletion command S2 (see FIG. 5) for deleting the content data to the temporary storage device 20 via the dedicated line 24 (S207). ). The temporary storage device 20 deletes the content data stored in the data storage unit 22 when receiving a deletion command from the broadcast receiving device 10. Thereafter, the transfer processing unit 14 transmits an activation command indicating whether or not to permit the validation of the content data to the content storage device 30 via the network (S208). The transfer processing unit 14 normally transmits an activation command that permits the validation of the content data. For example, if there is a problem with the broadcast receiving device 10, the transfer processing unit 14 issues an validation command that does not allow the validation of the content data. Send. Upon receipt of the activation command from the broadcast receiving device 10, the content storage device 30 validates the content data if the validation is permitted, and deletes the content data if the validation is not permitted. .

  When the process proceeds from step 206 to step 209, the transfer processing unit 14 determines whether or not an error has occurred in data transfer from the broadcast receiving apparatus 10 to the content storage apparatus 30 (see S209, FIG. 6). More specifically, the transfer processing unit 14 determines whether or not a situation has occurred in which the content data is divided during transfer or the content data is lost. The presence or absence of a data transfer error can be detected by the exchange between the broadcast receiving device 10 and the content storage device 30. If the transfer processing unit 14 determines that no error has occurred in the data transfer, the transfer processing unit 14 proceeds to the process of step 210. On the other hand, if the transfer processing unit 14 determines that an error has occurred in the data transfer, the transfer processing unit 14 proceeds to the process of step 211.

  When the process proceeds from step 209 to step 210, the transfer processing unit 14 determines whether or not the user cancels the data transfer (S210). If the transfer processing unit 14 determines that the data transfer has been canceled, the transfer processing unit 14 proceeds to the process of step 212. On the other hand, if the transfer processing unit 14 determines that the data transfer has not been canceled, the transfer processing unit 14 proceeds to the process of step 211.

  When the process proceeds from step 209 to step 211, or when the process proceeds from step 210 to step 211, the transfer processing unit 14 determines whether or not the data transfer should be performed again immediately (S211). The situation where the data transfer should be performed again immediately is a situation where the broadcast receiving device 10 has received retransmission request information for immediately requesting retransmission of untransferred content data from the content storage device 30. If the transfer processing unit 14 determines that the data transfer should be performed again immediately, the transfer processing unit 14 returns to the process of step 203 and executes the transfer of the content data again. Here, the transfer processing unit 14 transfers the content data D2 stored in the temporary storage device 20 to the content storage device 30 (see FIG. 7). Thereby, the transfer processing unit 14 can recover the transfer error of the content data.

  On the other hand, if the transfer processing unit 14 determines that the situation is that the data transfer should not be performed again immediately, the process proceeds to step 212. The situation where the data transfer should not be performed again immediately is the retransmission time information for setting the time when the broadcast receiving device 10 should retransmit the untransferred content data from the content storage device 30 (for example, the time when a device such as midnight is not used). It is the situation that received. When receiving the retransmission time information, the transfer processing unit 14 executes the transfer of the untransferred content data again at the time set by the retransmission time information.

  When the process proceeds from step 210 to step 212, or when the process proceeds from step 211 to step 212, the transfer processing unit 14 determines whether or not the content data in the temporary storage device 20 is to be deleted (S212). ). Here, the transfer processing unit 14 normally determines that the content data is to be deleted, but determines that the content data is not to be deleted when retransmission time information is received. To do. When it is determined that the content data in the temporary storage device 20 should be deleted, the transfer processing unit 14 deletes the content data stored in the temporary storage device 20 (S213). On the other hand, when determining that the content data in the temporary storage device 20 is not to be deleted, the transfer processing unit 14 ends the process without deleting the content data stored in the temporary storage device 20.

  Next, content data storage processing by the content storage device 30 will be described with reference to FIG. The content data storage process is realized by the content storage device 30 executing a data storage program.

  When the content data D1 is transferred from the broadcast receiving device 10, the transfer receiving unit 34 starts to receive the content data D1 (S301, see FIG. 4). The transfer receiving unit 34 stores the received content data in a state invalidated by the copyright protection function (S302).

  Next, the transfer receiving unit 34 determines whether or not the reception of the content data is completed (S303). Here, when it is determined that the reception of the content data is completed, the transfer receiving unit 34 proceeds to the process of step 304 and transmits the transfer completion information S1 to the broadcast receiving apparatus 10 that is the transfer source (S304). FIG. 5). On the other hand, when the transfer reception unit 34 determines that the reception of the content data is not completed, the transfer reception unit 34 proceeds to the process of step 308.

  Following the process of step 304, the transfer reception unit 34 determines whether or not an activation command indicating whether or not to enable the content data is received from the broadcast receiving device 10 (S305). Here, when the transfer reception unit 34 receives the activation command from the broadcast receiving device 10, the transfer reception unit 34 proceeds to the process of step 306. On the other hand, when the transfer reception unit 34 does not receive the activation command from the broadcast receiving device 10, the transfer reception unit 34 repeats the process of step 305 and waits until the activation command is received.

  When the process proceeds from step 305 to step 306, the transfer reception unit 34 refers to the activation command from the broadcast receiving device 10 and determines whether the activation of the content data is permitted (S306). Here, if the transfer receiving unit 34 determines that the validation of the content data is permitted, the transfer receiving unit 34 proceeds to the process of step 307. On the other hand, if the transfer reception unit 34 determines that the validation of the content data is not permitted, the transfer reception unit 34 proceeds to the process of step 309.

  When the process proceeds from step 306 to step 307, the transfer receiving unit 34 validates the content data stored in the data storage unit 32 (in other words, a reproducible state). As a result, the content data stored in the data storage unit 32 can be played back by the content playback device connected to the network (S307).

  If the process proceeds from step 303 to step 308, the transfer receiving unit 34 has detected an error in data transfer from the broadcast receiving apparatus 10 to the content storage apparatus 30, and an error that prevents the transfer of content data has occurred. Determine whether or not. More specifically, the transfer receiving unit 34 determines whether or not a situation has occurred in which the content data is divided during transfer or the content data is lost. Here, if the transfer receiving unit 34 determines that an error has occurred in which data transfer cannot be continued, the transfer receiving unit 34 proceeds to the process of step 309. On the other hand, if the transfer receiving unit 34 determines that an error that cannot continue the data transfer has occurred, the transfer receiving unit 34 returns to the process of step 301 to request retransmission request information for requesting retransmission of untransferred content data ( Alternatively, retransmission time information for setting a time at which untransferred content data should be retransmitted is transmitted to the broadcast receiving apparatus 10. The broadcast receiving apparatus 10 extracts the untransferred content data D2 from the temporary storage device 20 according to the retransmission request information and transmits it, and the transfer receiving unit 34 receives the content data from the broadcast receiving apparatus 10 (see FIG. 7).

  When the process proceeds from step 306 to step 309, or when the process proceeds from step 308 to step 309, the transfer reception unit 34 deletes all the content data stored in the data storage unit 32 (S309).

  According to the content data transfer method of the present embodiment described above, the content data is stored in the temporary storage device 20 simultaneously with the transfer of the content data from the broadcast receiving device 10 to the content storage device 30. Can handle transfer failures. That is, when the transfer of content data from the broadcast receiving device 10 to the content storage device 30 fails, the content data stored in the temporary storage device 20 is transferred again to the content storage device 30, so that the content storage device 30 Content data can be transferred reliably. Such a content data transfer method is remarkably effective when data is transferred via the network 7 in which the communication environment is unstable because it is shared by a plurality of devices.

  In particular, according to the content data transfer method of the present embodiment, the content data can be reliably transferred to the content storage device 30 even if the content data has been subjected to copyright protection processing. That is, the temporary storage device 20 and the content storage device 30 store the content data in an invalid state during the transfer of the content data. When the transfer of content data fails in the middle, the untransferred content data stored in the temporary storage device 20 is transferred again. When the transfer of the content data is completed, the content data in the temporary storage device 20 is deleted and the content data in the content storage device 30 is validated. By such a content data transfer method, even when content data transfer fails in the middle, it is possible to recover from a state where the content data is divided or lost.

  In the embodiment described above, the transfer processing unit 14 may transfer all the content data at once, or divide the content data into a plurality of divided data and divide the divided data of the content data into a plurality of times. May be transferred. When transferring all the content data at once, if the transfer of the content data fails, the content storage device 30 discards the content data being stored and the transfer processing unit 14 transfers all the content data again. In addition, when transferring the divided content data in a plurality of times, if the transfer of the content data fails, the content storage device 30 discards the divided data that failed to be transferred, and the transfer processing unit 14 Only the divided data that failed to be transferred is transferred again.

  Note that the transfer processing unit 14 may transfer the content data by using the temporary storage device 20 as a buffer. That is, when the transfer processing unit 14 acquires content data from a broadcast wave, the transfer processing unit 14 stores the acquired content data in the data storage unit 22 of the temporary storage device 20. Then, the transfer processing unit 14 divides the content data stored in the data storage unit 22 of the temporary storage device 20 into a plurality of divided data, and stores the divided data of the content data according to the order received by the tuner unit 12. Transfer to device 30. Accordingly, the content storage device 30 can capture the content data in the order received by the tuner unit 12.

  When the temporary storage device 20 is used as a buffer, the transfer processing unit 14 transfers the divided content data to the content storage device 30 at a transfer rate allowed by the network 7. Thereby, even when the transfer rate allowed by the network is low and the content data cannot be transferred in real time, the content data can be transferred reliably. Further, even when the transfer rate allowed by the network is high and the content data is too large to be transferred in real time, the time occupied by the network can be shortened by dividing and transferring the content data.

  In addition, when the temporary storage device 20 is used as a buffer, the transfer processing unit 14 checks whether the transfer of the divided content data has failed every time the divided content data is transferred to the content storage device 30. If the data transfer fails, the divided content data may be transferred again. As a result, the content storage device 30 can reliably fetch the content data in the order, so that the divided content data can be combined well.

(Modification 1)
Next, a first modification of the above-described embodiment will be described. The content data transfer process according to the first modification will be described with reference to FIG. Note that. In FIG. 8, processes having the same contents as those in FIG. In FIG. 8, processing different from FIG. 2 is step 202A, step 204A, and step 204B.

  In step 202A, the transfer processing unit 14 converts the data format of the content data extracted from the broadcast wave, and starts storing the converted content data in the temporary storage device 20 (S202A). Here, the conversion processing of the data format of the content data is processing for performing bit rate conversion, codec conversion, etc. on the content data. For example, content data in the MPEG2-TS format is converted into content data in the MPEG2-PS format or MPEG4 format. It is processing to convert to.

  In step 204A and step 204B, the transfer processing unit 14 converts the data format of the content data extracted from the broadcast wave and starts transferring the converted content data to the content storage device 30 in real time (S204A, S204B). ). Here, the data format conversion process of the content data is the same as the data format conversion process in step 202A. By converting the data format of the content data in this way, it is possible to make the content data into a data format suitable for storage in the content storage device 30, or to reduce the amount of content data and facilitate content data transfer processing. it can.

  As shown in FIG. 9, when the content data transfer process fails, the transfer processing unit 14 transfers the content data stored in the temporary storage device 20 to the content storage device 30 again. By transferring the content data stored in the temporary storage device 20 to the content storage device 30 again, the content data can be reliably transferred to the content storage device 30. Since the data format of the content data in the temporary storage device 20 has already been converted, the transfer processing unit 14 can transfer the content data to the content storage device 30 without converting the data format of the content data.

(Modification 2)
Next, a second modification of the above-described embodiment will be described. The content data transfer process according to the second modification will be described with reference to FIG. In the home network of the second modified example, in addition to one set of broadcast receiving device 10A and temporary storage device 20A, another set of broadcast receiving device 10B and temporary storage device 20B is provided. Each set of broadcast receiving devices 10A and 10B and temporary storage devices 20A and 20B are the same as those in the above-described embodiment. When each of the broadcast receiving devices 10A and 10B receives a broadcast wave of a television broadcast and extracts content data, the broadcast receiving devices 10A and 10B transfer the content data to the content storage device 30 via the network 7. With such a home network configuration, content data can be collected in one content storage device 30. Note that there may be three or more broadcast receiving devices connected to the content storage device 30 via the network 7.

It is a block diagram which shows the home network of this embodiment. It is a flowchart which shows the transfer process of content data. It is a flowchart which shows the accumulation | storage process of content data. It is FIG. 1 for demonstrating the transfer process of content data. It is FIG. 2 for demonstrating the transfer process of content data. FIG. 3 is a third diagram for explaining a content data transfer process; It is FIG. 4 for demonstrating the transfer process of content data. It is a flowchart which shows the transfer process of the content data which concerns on a 1st modification. It is a figure for demonstrating the transfer process of the content data which concerns on a 1st modification. It is a block diagram which shows the home network which concerns on a 2nd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Home network, 3 ... Receiving device, 5 ... Storage | storage device, 7 ... Network, 10 ... Broadcast receiving apparatus, 12 ... Tuner part, 14 ... Transfer processing part, 16 ... Network interface part, 20 ... Temporary storage device, 22 ... Data storage unit, 24 ... dedicated line, 30 ... content storage device, 32 ... data storage unit, 34 ... transfer receiving unit, 36 ... network interface unit.

Claims (10)

A tuner unit that receives broadcast waves and acquires content data that has undergone copyright protection processing;
A network interface unit connected to the storage device via a network;
A data storage unit for sequentially storing content data acquired by the tuner unit;
The content data acquired by the tuner unit is sequentially transferred to the storage device via the network, and when the transfer fails, the content data stored in the data storage unit is transferred to the storage device via the network. A transfer processing unit to transfer,
With
When the transfer processing unit finishes transferring the content data to the storage device, the transfer processing unit transmits an enabling command for permitting the content data to be enabled to the storage device and deletes the content data stored in the data storage unit A receiving device characterized by:   The transfer processing unit divides content data into a plurality of divided data and transfers the divided data to the storage device. When the transfer fails, the transfer processing unit transfers the divided data that failed to transfer to the storage device. The receiving device according to claim 1.   The receiving device according to claim 1, wherein the transfer processing unit transfers the content data stored in the data storage unit to the storage device according to an order received by the tuner unit.   The transfer processing unit determines whether or not the content data can be transferred to the storage device, and transfers the content data to the storage device when the content data can be transferred. The receiving device according to any one of claims 1 to 3.   The receiving device according to claim 1, wherein the transfer processing unit transfers the content data again at a set time when the transfer of the content data fails.   The transfer processing unit converts the data format of the content data acquired by the tuner unit, and then transfers the content data having the converted data format to the storage device. The receiving device according to any one of the above.   The receiving device according to claim 1, wherein the data storage unit stores data obtained by converting a data format of content data acquired by the tuner unit.   8. The receiving apparatus according to claim 6, wherein the conversion of the data format of the content data is bit rate conversion.   8. The receiving apparatus according to claim 6, wherein the conversion of the data format of the content data is a conversion of an encoding method. A receiving device that receives broadcast waves and acquires content data that has undergone copyright protection processing transfers the acquired content data to a storage device via a network,
The content data acquired by receiving the broadcast wave by the receiving device is sequentially stored in the data storage unit of the receiving device,
The content data obtained by the receiving device receiving broadcast waves is sequentially transferred to the storage device via the network,
If the transfer fails, transfer the content data stored in the data storage unit to the storage device via the network,
When the content data has been transferred to the storage device, a content data transfer method for transmitting to the storage device an enabling command for enabling the content data and deleting the content data stored in the data storage unit .

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