JP2006033376A - Network type data reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network type data reproducing apparatus, in which operability is improved by employing each function of a plurality of devices in a maximum limit. <P>SOLUTION: A DVD player (video image reproducing part) 100 and a personal computer (external decoding device part) 300 are network-connected. Whether the video data of the optical disk 101 inserted into the player 100 can be decoded or impossible is decided by a hardware decoder 103. When it is discriminated as being impossible, video data are transmitted to the personal computer 300 via the network, decoded by a software decoder part 303. The video data after decoding are received. Consequently, the video data of format which do not correspond to the player itself can be decoded and reproduced by only operation from the player 100. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a data reproducing apparatus that reproduces encoded data included in a recording medium such as an optical disk, and more particularly to a technique for realizing data reproduction using a plurality of devices connected to each other via a network.

A technique for connecting a plurality of appliances in a home via a network is known. These appliances are remotely operated or linked to each other while being managed by devices called home servers, AV servers, etc. (see, for example, Patent Document 1).
JP 2002-189852 A

  When a DVD player and a personal computer (hereinafter referred to as a personal computer) are connected via a network, the video data stored in the HDD unit built in the personal computer is transmitted to the DVD player, and the video data is stored in a hardware provided in the DVD player. Playback using a wear decoder is possible. However, anyone can access data to the HDD unit, which causes a problem.

  Also, in the case of an optical disc on which data in an encoding format that cannot be decoded by a DVD player but can be decoded by a personal computer is recorded, an operation such as mounting the optical disc on a personal computer instead of the DVD player is performed. Troublesome.

  An object of the present invention is to provide a network type data reproducing apparatus that improves the operability while making the best use of the functions of a plurality of devices.

  Another object of the present invention is to provide a network type data reproducing apparatus capable of achieving data access restriction.

  In order to achieve the above object, a first reproducing apparatus according to the present invention is a reproducing apparatus (for example, a DVD player) that reproduces encoded data included in a recording medium (for example, an optical disk), and is read from the recording medium. A decoding unit (for example, a hardware decoding unit) that decodes the read data, and an external device (for example, a personal computer) that can decode data in an encoding format that cannot be decoded by the decoding unit. ), A receiving unit that receives data decoded by the external device, an output unit that outputs data decoded by the decoding unit or data received by the receiving unit, and a recording medium If the data read from the data is in an encoded format that cannot be decoded by the decoding unit, In which the data transmitted to the external device, and employs a configuration in which a control unit that controls to receive the decoded data by the external device via the receiving unit and.

  A corresponding external decoding device is a decoding device (for example, a personal computer) that receives and decodes encoded data from a playback device (for example, a DVD player), and a receiving unit that receives data transmitted from the playback device; A decoding unit (for example, a software decoding unit) that decodes data received via the receiving unit, a transmission unit that transmits data decoded by the decoding unit to the playback device, and a decoding request from the playback device Control that, when receiving the notification signal, controls the decoding unit to decode the data received via the receiving unit, and transmits the data decoded by the decoding unit to the playback device via the transmitting unit A part.

  A second playback device according to the present invention is a playback device (for example, a DVD player) connected to an external device (for example, a personal computer) having an internal storage means (for example, an HDD unit), and a recording medium (for example, an optical disk). ), A key information extraction unit for extracting key information for allowing data access to the internal storage means from the data read by the drive unit, and data from the internal storage means of the external device In this configuration, a control unit that transmits a request signal for acquisition to the external device together with key information and a reception unit that receives data read from the internal storage unit from the external device are employed.

  A data device corresponding to this is a data device (for example, a personal computer) to which a playback device (for example, a DVD player) is connected externally, and a recording medium (for example, an HDD unit) connected to the inside, and the recording device from the playback device. Receives a request signal and key information for acquiring data in the medium, and reads data requested by the playback device from the recording medium if the key information is authorized to access the recording medium. A control unit that controls the data and a transmission unit that transmits the read data to the playback device.

  According to the first reproducing apparatus of the present invention, it is possible to provide a network type data reproducing apparatus that improves the operability while making the most of the functions of a plurality of devices. Specifically, even with a video format that cannot be decoded by a DVD player, video playback can be achieved by an operation from this player. Even when a new format of video data appears, video playback on the player side becomes possible by supporting only the external decoding device.

  According to the second reproducing apparatus of the present invention, a network type data reproducing apparatus that can achieve data access restriction can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a configuration example of a network type data reproducing apparatus according to the present invention. 1 includes a video playback device unit 100, a video display device unit 200, and an external decoding device unit 300. For example, the video playback device unit 100 is a DVD player, the video display device unit 200 is a liquid crystal display, and the external decoding device unit 300 is a personal computer. The video reproduction device unit 100 and the external decoding device unit 300 are connected to each other via a network.

  The video reproduction device unit 100 includes a drive unit 102 that receives the insertion of the optical disc 101, a hardware decoding unit 103, an output unit 104 that controls data output to the video display device unit 200, a video determination unit 105, a copyright presence / absence A determination unit 106, a control unit 107, a video data transmission unit 108 that controls data transmission to the external decoding device unit 300, a video data reception unit 109 that controls data reception from the external decoding device unit 300, and a buffer unit 110 And a connection display unit 111.

  The video display device unit 200 includes a frame memory unit 201 that receives data from the video playback device unit 100 and a drawing unit 202.

  The external decoding device unit 300 transmits data to the video data receiving unit 301 that controls data reception from the video playback device unit 100, a buffer unit 302, a software decoding unit 303, a control unit 304, and the video playback device unit 100. A video data transmission unit 305 for managing the video data.

  According to the configuration of FIG. 1, when the optical disk 101 on which video data is recorded is inserted into the drive unit 102 and a video playback request is received from the control unit 107, the video data recorded on the optical disk 101 is received by the drive unit 102. read out. Then, the type of the read video data is discriminated by the video discriminating unit 105 and the discrimination result is notified to the control unit 107. As a result of the determination, if the hardware decoding unit 103 can decode the video data, the hardware decoding unit 103 decodes the video data, and the video data is displayed by the drawing unit 202 via the frame memory unit 201 provided in the video display device unit 200. Is displayed.

  Next, a series of operations for decoding the video data of the optical disc 101 inserted into the drive unit 102 by the software decoding unit 303 provided in the external decoding device unit 300 and displaying the decoded data on the video display device unit 200 will be described.

  First, the external decoding device unit 300 is connected to the video reproduction device unit 100 via a network. If the result of determination by the video determination unit 105 is that the hardware decoding unit 103 cannot decode, the video data read by the drive unit 102 from the optical disc 101 is sent to the external decoding device unit 300 by the video data transmission unit 108 via the network. Send. At the same time, the control unit 107 transmits a notification signal for causing the external decoding device unit 300 to decode the video data to the control unit 304 of the external decoding device unit 300. As a specification of video data, for example, the bit rate of MPEG2 is 9.8 Mbps at the maximum. On the other hand, recent network transfer speeds of 1 Gbps for wired LANs and 45 Mbps for high-speed wireless LANs (11 Mbps for low-speed wireless LANs) can be realized, and high-speed transmission / reception of video data can be realized.

  In the external decoding device unit 300, the video data received by the video data receiving unit 301 is stored in the buffer unit 302. The software decoding unit 303 decodes the video data stored in the buffer unit 302 into a format that can be decoded by the hardware decoding unit 103 of the video reproduction device unit 100, and stores the decoded video data in the buffer unit 302. . The decoded video data is returned by the video data transmission unit 305 to the video reproduction device unit 100 via the network.

  In the video reproduction device unit 100, the video data received by the video data receiving unit 109 is stored in the buffer unit 110. The video data stored in the buffer unit 110 is decoded by the hardware decoding unit 103 into a format that can be displayed on the video display device unit 200, and finally, via the frame memory unit 201 provided in the video display device unit 200. Then, the drawing unit 202 displays the video.

  As described above, according to the network type data reproducing device of FIG. 1, in addition to the conventional video reproducing function, the software decoding unit 303 of the external decoding device unit 300 located away from the video reproducing device unit 100 is used. Thus, the video data in a format not supported by the video playback device unit 100 can be decoded and played back only by an operation from the video playback device unit 100.

  The control unit 107 of the video reproduction device unit 100 preferably has a protocol for identifying the connection with the external decoding device unit 300. The same applies to the control unit 304 of the external decoding device unit 300. This makes it possible to prevent leakage of video data to a third device other than predetermined devices. For example, the unique identification information of the video reproduction device unit 100 and the unique identification information of the external decoding device unit 300 may be used. Here, the unique identification information is a device serial number, a MAC (Media Access Control) address, or the like. Only when the control units 107 and 304 of either the video reproduction device unit 100 or the external decoding device unit 300 can confirm that their unique identification numbers correspond one-to-one, the external decoding device unit 300 Assume that the software decoding unit 303 is used. As a result, the correspondence between the video reproduction device unit 100 and the external decoding device unit 300 is one-to-one, and the third device cannot be used.

  If the connection display unit 111 shown in FIG. 1 is used, the user can easily confirm the connection between the video reproduction device unit 100 and the external decoding device unit 300. The control unit 304 of the external decoding device unit 300 notifies the control unit 107 that the connection with the video reproduction device unit 100 has been completed. The connection display unit 111 provided in the video reproduction device unit 100 displays the connection to the external decoding device unit 300 so as to be visually recognized, and may be any of a FL display tube, an LED, an LCD, and the like. .

  In order to prevent unnecessary transmission / reception of video data between the video playback device unit 100 and the external decoding device unit 300, it is necessary for the video playback that the video data read from the optical disc 101 can be decoded by the software decoding unit 303. Only when it can be confirmed by the control unit 107 of the device unit 100, the video data may be transmitted from the video reproduction device unit 100 to the external decoding device unit 300. For this purpose, a list of video formats that can be decoded by the software decoding unit 303 may be created by the control unit 304 of the external decoding device unit 300 and notified to the video playback device unit 100. This list is, for example, a correspondence table of data formats that can be decoded by the software decoding unit 303, identification data in the data format, and positions on the optical disc 101 from which the identification data can be read. Note that the video reproduction device unit 100 may hold a list of video formats that can be decoded by the software decoding unit 303 in advance.

  Alternatively, the control unit 304 of the external decoding device unit 300 may have a function of determining whether the software decoding unit 303 can handle decoding of video data received from the video playback device unit 100. If it is impossible for the software decoding unit 303 to perform decoding, an error is returned to the video reproduction device unit 100.

  The control unit 107 of the video reproduction apparatus unit 100 can be provided with a transmission retry control function. The control unit 107 obtains information regarding video data read from the optical disc 101 from the drive unit 102. When the decoded video data returned from the external decoding device 300 via the network is stored in the buffer unit 110, the information of the video data obtained before transmission is compared with the information of the video data after reception. When it is determined that the two pieces of video data match, the video data is sent from the buffer unit 110 to the hardware decoding unit 103. However, when it is determined that the two pieces of video data do not match, a retry is performed from the process of transmitting the video data of the optical disk 101 read from the drive unit 102 to the external decoding device unit 300. Accordingly, even if video data is erroneous or missing due to transmission / reception, it can be known before being displayed on the video display device unit 200, and it is possible to prevent display of incomplete video.

  The copyright presence / absence discriminating unit 106 shown in FIG. 1 discriminates whether or not there is a copyright in the video data read from the optical disc 101. When there is a copyright, the video data transmission units 108 and 305 of the video reproduction device unit 100 and the external decoding device unit 300 encrypt the transmission data, and the video data reception units 109 and 301 receive the data. Decrypt data. As a result, decoding can be performed via the network only when the correspondence between the video reproduction device unit 100 and the external decoding device unit 300 is one-to-one, and illegal copying of video data using the third device can be prevented. it can.

  In addition, the control unit 304 of the external decoding device unit 300 checks the amount of data remaining in the buffer unit 302 after returning the video data to the video reproduction device unit 100, and if the data remains over a certain amount. The data is erased from the buffer unit 302. As a result, it is possible to prevent illegally copying copyrighted video data.

  FIG. 2 shows another configuration example of the network type data reproducing apparatus according to the present invention. 2 includes a video playback device unit 400, a video display device unit 500, and an external decoding device unit 600. For example, the video reproduction device unit 400 is a DVD player, the video display device unit 500 is a liquid crystal display, and the external decoding device unit 600 is a personal computer. The video reproduction device unit 400 and the external decoding device unit 600 are connected to each other via a network.

  The video reproduction device unit 400 includes a drive unit 402 that receives insertion of the optical disc 401, a hardware decoding unit 403, an output unit 404 that controls data output to the video display device unit 500, a control unit 407, and an external decoding device unit. A video data receiving unit 409 that controls data reception from the control unit 600, a buffer unit 410, and a key information extracting unit 412 are provided.

  The video display device unit 500 includes a frame memory unit 501 that receives data from the video playback device unit 400 and a drawing unit 502.

  The external decoding device unit 600 includes a buffer unit 602, a software decoding unit 603, a control unit 604, a video data transmission unit 605 that manages data transmission to the video reproduction device unit 400, and an HDD unit 606. The key information extraction unit 412 of the video reproduction device unit 400 extracts key information (authentication key) for permitting data access to the HDD unit 606 from the data read by the drive unit 402 from the optical disc 401. It is.

  According to the configuration of FIG. 2, in order to display video data that can be decoded by the hardware decoding unit 403 on the drawing unit 502 provided in the video display device unit 500, the optical disc 401 on which the video data is recorded is displayed on the drive unit 402. When the video playback request is received from the control unit 407, the video data is transferred from the drive unit 402 to the hardware decoding unit 403 for decoding, and then transmitted via the frame memory unit 501 of the video display device unit 500. The drawing unit 502 displays an image.

  In order to display the video based on the data stored in the HDD unit 606 on the video display unit 500, it is necessary to insert the optical disc 401 in which the authentication key is recorded into the drive unit 402. The control unit 407 of the video reproduction device unit 400 transmits a request signal for acquiring video data from the HDD unit 606 to the control unit 604 of the external decoding device unit 600 together with the authentication key obtained from the key information extraction unit 412. To do.

  In the external decoding device unit 600, only when the control unit 604 receives the authentication key and recognizes that access to the HDD unit 606 can be permitted, the video data in the HDD unit 606 is read and the decoding is performed by software decoding. In part 603, the operation is started. The video data decoded by the software decoding unit 603 is stored in the buffer unit 602 and transmitted to the video reproduction device unit 400 via the network by the video data transmission unit 605.

  In the video reproduction device unit 400, the video data received by the video data receiving unit 409 is stored in the buffer unit 410. Then, the video data stored in the buffer unit 410 is finally displayed as a video on the drawing unit 502 via the frame memory unit 501 provided in the video display device unit 500.

  As described above, according to the network type data reproduction device of FIG. 2, it is limited to only a user who has the optical disc 401 including the authentication key, and is incorporated in the external decoding device unit 600 under the control of the video reproduction device unit 400. The video based on the data in the HDD unit 606 can be displayed on the video display device unit 500.

  In order to give different restrictions on viewing of video data stored in the HDD unit 606 for each user, the control unit 604 has a correspondence table between authentication keys and video data to which data access should be permitted. That's fine. That is, the range of data access to the HDD unit 606 is limited in accordance with the authentication key received from the video playback device unit 400. As a result, it is possible to protect privacy and prevent an inappropriate user from viewing an age-restricted video.

  As described above, the first reproduction apparatus according to the present invention is a network type data reproduction apparatus that improves the operability while making the most of the functions of a plurality of devices, and the second reproduction apparatus according to the present invention. The playback device is a network type data playback device that can achieve data access restriction, and can be applied to all uses for playing back digital data such as a DVD player.

It is a block diagram which shows the structural example of the network type data reproduction apparatus which concerns on this invention. It is a block diagram which shows the other structural example of the network type data reproducing apparatus which concerns on this invention.

Explanation of symbols

100, 400 Video reproduction device unit 101, 401 Optical disc 102, 402 Drive unit 103, 403 Hardware decoding unit 104, 404 Output unit 105 Video discrimination unit 106 Copyright presence / absence discrimination unit 107, 407 Control unit 108 Video data transmission unit 109, 409 Video data receiving unit 110, 410 Buffer unit 111 Connection display unit 200, 500 Video display unit 201, 501 Frame memory unit 202, 502 Drawing unit 300, 600 External decoding unit 301 Video data receiving unit 302, 602 Buffer unit 303 , 603 Software decoding unit 304, 604 Control unit 305, 605 Video data transmission unit 412 Key information extraction unit 606 HDD unit

Claims (33)

A playback device for playing back encoded data included in a recording medium,
A decoding unit for decoding data read from the recording medium;
A transmission unit that transmits data read from the recording medium to an external device capable of decoding data in an encoding format that cannot be decoded by the decoding unit;
A receiving unit for receiving data decoded by the external device;
An output unit for outputting the data decoded by the decoding unit or the data received by the receiving unit;
When the data read from the recording medium is data in an encoding format that cannot be decoded by the decoding unit, the data is transmitted to the external device via the transmitting unit, and the receiving unit is And a control unit that controls to receive data decoded by the external device.   The playback apparatus according to claim 1, wherein the playback apparatus is connected to the external apparatus via a network.   2. The playback apparatus according to claim 1, wherein the control unit transmits a notification signal for causing the external device to decode data in an encoding format that cannot be decoded by the decoding unit.   4. The playback apparatus according to claim 3, wherein the control unit includes a protocol for identifying a connection with the external apparatus.   The playback apparatus according to claim 4, wherein the control unit controls a device other than a predetermined device to be the external device.   The protocol is a system in which a unique serial number is transmitted to the external device, and the external device is identified as to whether the connection with the external device corresponds to the specified one-to-one correspondence. Item 5. The playback device according to Item 4.   The protocol is a method in which a unique MAC address is transmitted to the external device, and the external device is identified as to whether the connection with the external device corresponds to the specified one-to-one. Item 5. The playback device according to Item 4.   The protocol is a method of receiving a unique serial number transmitted from the external device and identifying whether the connection with the external device corresponds one-to-one with the specified one. 4. The playback device according to 4.   The protocol is a method of receiving a unique MAC address transmitted from the external device and identifying whether the connection with the external device corresponds to the specified one-to-one. 4. The playback device according to 4.   5. The reproducing apparatus according to claim 4, further comprising a display unit for displaying that the connection to the external apparatus is visible.   4. The playback apparatus according to claim 3, wherein the control unit has a function of identifying whether an encoding format of data read from the recording medium is an encoding format that can be decoded by the external device. .   The control unit includes a correspondence table of data format, identification data of the data format, and position of the recording medium from which the identification data can be read as information representing an encoding format of data that can be decoded by the external device. 12. The reproducing apparatus according to claim 11, further comprising:   12. The playback apparatus according to claim 11, wherein the control unit performs control so as to receive information on an encoding format of data that can be decoded by the external apparatus from the external apparatus.   12. The reproducing apparatus according to claim 11, wherein the control unit holds in advance information on an encoding format of data that can be decoded by the external apparatus.   The control unit compares the data before being transmitted to the external device with the data received from the external device, so that data is lost between transmission to the external device and reception from the external device. The reproducing apparatus according to claim 1, wherein the reproducing apparatus has a function of detecting whether there is any.   2. The reproducing apparatus according to claim 1, wherein the transmitting unit has a function of encrypting transmission data, and the receiving unit has a function of decrypting received data. A decoding device that receives encoded data from a playback device and decodes the encoded data,
A receiving unit for receiving data transmitted from the playback device;
A decoding unit for decoding data received through the receiving unit;
A transmission unit for transmitting data decoded by the decoding unit to the playback device;
When a notification signal requesting decoding is received from the playback device, the decoding unit decodes the data received via the receiving unit, and the data decoded by the decoding unit via the transmitting unit A decoding apparatus comprising: a control unit that controls to transmit to the reproduction apparatus.   18. The decoding device according to claim 17, wherein the decoding device is connected to the playback device via a network.   18. The decoding apparatus according to claim 17, wherein the control unit has a protocol for identifying a connection with the playback apparatus.   The decoding device according to claim 19, wherein the control unit controls a device other than a predetermined device to be the reproduction device.   The protocol is a method in which a unique serial number is transmitted to the playback device, and the playback device identifies whether the connection with the playback device corresponds to the specified one-to-one correspondence. Item 20. A decoding device according to Item 19.   The protocol is a method in which a unique MAC address is transmitted to the playback device, and the playback device identifies whether the connection with the playback device corresponds to the specified one-to-one correspondence. Item 20. A decoding device according to Item 19.   The protocol is a method of receiving a unique serial number transmitted from the playback device and identifying whether the connection with the playback device corresponds to the specified one-to-one correspondence. 19. The decoding device according to 19.   The protocol is a method of receiving a unique MAC address transmitted from the playback device and identifying whether the connection with the playback device corresponds one-to-one with the specified one. 19. The decoding device according to 19.   The decoding device according to claim 19, wherein the control unit notifies the reproduction device that the connection with the reproduction device is completed.   18. The decoding device according to claim 17, wherein the control unit notifies the reproduction device of information indicating an encoding format of data that can be decoded by the decoding unit.   The control unit includes, as information indicating an encoding format of data decodable by the decoding unit, a data format, identification data of the data format, and a recording medium inserted in the playback device from which the identification data can be read. 18. The decoding apparatus according to claim 17, further comprising a correspondence table with positions.   18. The decoding device according to claim 17, wherein the control unit has a function of determining whether or not the data received from the reproduction device can be decoded by the decoding unit.   18. The decoding apparatus according to claim 17, wherein the reception unit has a function of decrypting received data, and the transmission unit has a function of encrypting transmission data.   18. The decoding device according to claim 17, wherein the control unit deletes the received data when the decoding result of the data received by the receiving unit is transmitted to the reproduction device. A playback device connected to an external device having an internal storage means,
A drive unit for reading data from a recording medium;
A key information extraction unit that extracts key information for allowing data access to the internal storage unit from the data read by the drive unit;
A control unit for transmitting a request signal for acquiring data from the internal storage unit of the external device to the external device together with the key information;
A reproducing apparatus comprising: a receiving unit that receives data read from the internal storage unit from the external apparatus. A data device to which an external playback device is connected,
A recording medium connected inside;
A request signal and key information for acquiring data in the recording medium is received from the playback device, and the playback device requests if the key information has authority to access data to the recording medium. A control unit for controlling the data to be read from the recording medium;
A data device comprising: a transmission unit that transmits the read data to the reproduction device.   The control unit has a correspondence table between key information and data to which data access should be permitted, and limits the range of data access to the recording medium according to the key information received from the playback device according to the correspondence table. 33. A data device according to claim 32.

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