JP5002500B2 - Video server and material data copy method - Google Patents

Description

  The present invention relates to a video server in which recording / playback of material data is controlled by an external controller and a material data copying method used in the video server.

  In recent years, a VDCP (Video Disk Communication Protocol) protocol has been used as an industry standard as a control protocol for controlling recording / reproduction of material data to / from a video server. In general, a video server is externally connected with a VDCP controller that outputs a control signal conforming to the VDCP protocol. In the video server, recording / reproduction of material data is controlled by a control signal from the VDCP controller.

  By the way, the VDCP protocol has no command for copying material data. Therefore, when copying the material data recorded in the storage device of the video server to a removable disk or the like, it is necessary to uniquely define an extension command in the VDCP protocol and mount it on the video server.

  However, when the unique command is defined and implemented as described above, there is a problem that it is necessary to change the design of the VDCP controller so as to correspond to the defined unique extension command, and extra time is required.

A technique has been proposed in which a plurality of generations of data can be managed in the disk array device at the secondary site by the remote copy function installed in the disk array device at the primary site (see, for example, Patent Document 1). .)
JP 2005-275494 A

  As described above, there is no command for copying material data in the conventional VDCP protocol, and when copying, it is necessary to uniquely define and implement an extension command. In addition, when an original extension command is implemented, it is necessary to change the design of an existing VDCP controller, which takes extra time.

  The present invention has been made under the circumstances described above, and the purpose thereof is a video server that does not need to define an extended command independently and does not require a design change of an existing VDCP controller even when copying material data. And a material data copy method.

  To achieve the above object, a video server according to the present invention outputs a plurality of storage devices capable of recording / reproducing material data, and material data reproduced from any of the plurality of storage devices. , One of which inputs the material data recorded in any one of the plurality of storage devices, and the output means specified as virtual output means for virtually outputting the reproduced material data, Specifies input means specified as virtual input means for virtually inputting material data output from the virtual output means, and input means for inputting material data among the plurality of input means, and Of the plurality of storage devices, the storage device for recording the material data is specified by specifying a storage device that records the material data input from the specified input means, A control unit for designating a storage device for reproducing the material data from among the storage devices and designating an output means for outputting the reproduced material data among the plurality of output means, and controlling the reproduction of the material data. When the material data is replicated between the plurality of storage devices, the control unit performs reproduction control by designating the storage device that reproduces the material data to be replicated and the virtual output means, and the virtual input Recording control is performed by designating means and a storage device for recording the material data to be copied.

  The material data copying method according to the present invention is used in a video server that records / reproduces material data to / from a plurality of storage devices, and outputs material data reproduced from any of the plurality of storage devices. Virtual output means for virtually outputting the reproduced material data from any of the output means is specified, and the virtual data is input from any of the input means for inputting the material data recorded in any of the plurality of storage devices A virtual input means for virtually inputting the material data outputted and when reproducing the recorded material data among the plurality of storage devices, a storage device for reproducing the material data, and the virtual output means, The reproduction control of the material data is performed by designating the virtual data, and the recording control is performed by designating the virtual input means and the storage device for recording the input material data. To.

  In the video server and the material data copy method configured as described above, the material data reproduced from the storage device designated as the storage device for reproducing the material data is virtually output from the virtual output means by the reproduction control of the control unit. In addition, by the recording control of the control unit, the virtually output material data is virtually input from the virtual input means and recorded in the storage device designated as the storage device to be recorded. As a result, the material data can be duplicated only by reproduction control and recording control.

  According to the present invention, there is provided a video server and a material data copying method that do not require an extended command to be defined independently even when material data is copied, and that does not require a design change of an existing VDCP controller. be able to.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, an example will be described in which the video server 10 includes a recording device 11 and a removable recording medium 15 as storage devices capable of recording / reproducing material data.

  FIG. 1 is a block diagram showing a configuration of a video server 10 and a VDCP controller 20 according to an embodiment of the present invention. In FIG. 1, the video server 10 is connected to a VDCP controller 20 that controls recording / playback in the video server 10 in accordance with the VDCP protocol via an RS-422 input / output port. The VDCP controller 20 controls the recording of the material data by outputting a recording command to the video server 10 and controls the reproduction of the material data by outputting a reproduction command.

  The video server 10 includes a recording device 11 capable of recording / reproducing material data in the drive C. The video server 10 is controlled by the VDCP protocol and can include 254 ports for inputting / outputting material data to / from the recording device 11. Among these ports, port numbers −1 to −127 are for recording, and +1 to +127 are for reproduction. In this embodiment, a recording signal port is assigned to -1, and a reproduction signal port is assigned to +1.

  The control unit 12 receives from the VDCP controller 20 a recording reservation command that specifies the recording device 11 and the recording material ID to the recording signal port-1 that has been opened and selected in advance. Thereafter, when receiving a recording start command from the VDCP controller 20, the control unit 12 derives material data from the recording signal port-1 that is opened and selected to the recording device 11, and records the material data in the recording device 11. In addition, the control unit 12 receives from the VDCP controller 20 a reproduction reservation command that designates the recording device 11 and the reproduction material ID for the reproduction signal port +1 opened and selected in advance. Thereafter, when receiving the reproduction start command, the control unit 12 reproduces the material data from the recording device 11 and outputs the material data reproduced from the reproduction signal port +1 that has been opened and selected in advance.

  When the recording signal port-1 enters the recording state by the recording control of the control unit 12, it receives baseband material data from the outside. An MPEG (Moving Picture Experts Group) encoder 13 is connected to the recording signal port-1, and the baseband material data is MPEG-encoded by the MPEG encoder 13 to become an MPEG moving image material, which is derived to the recording device 11. The

  When the reproduction signal port +1 is in a reproduction state by reproduction control of the control unit 12, the baseband band material data reproduced from the recording device 11 is output to the outside. An MPEG decoder 14 is connected to the reproduction signal port +1, and the MPEG moving picture material reproduced from the recording device 11 is MPEG-decoded by the MPEG decoder 14 into a baseband signal and output from the reproduction signal port +1. The

  The recording device 11 is capable of recording / reproducing material data. The recording device 11 records the MPEG moving image material as a file by the recording control of the control unit 12. In addition, the recording device 11 reproduces the recorded MPEG moving image material and outputs it to the MPEG decoder 14 by the reproduction control of the control unit 12.

  The video server 10 further includes a removable recording medium 15 such as a flash memory in the drive D. Also, the video server 10 assigns port-21 in the above port to the virtual recording port and assigns port +21 to the virtual playback port. Here, port-21 is assigned to the virtual recording port and port +21 is assigned to the virtual playback port because the maximum number of recording signal ports and playback signal ports to be processed in parallel in the use of a general video server is This is because it is assumed to be about 20.

  The control unit 12 receives from the VDCP controller 20 a playback reservation command that designates the recording device 11 and the playback material ID in the virtual playback port +21 that has been opened and selected in advance. After that, when receiving the playback start command, the control unit 12 puts the virtual playback port +21 opened and selected in advance into a playback state and virtually outputs the MPEG moving image material played back from the recording device 11 as copy data. Further, the control unit 12 receives from the VDCP controller 20 a recording reservation command that designates the removable recording medium 15 and the recording material ID to the virtual recording port-21 opened and selected in advance. After that, when receiving the recording start command, the control unit 12 virtually inputs the duplicate data virtually output from the virtual reproduction port +21 with the virtual recording port 21 opened and selected in advance being in the recording state. , To the removable recording medium 15.

  Furthermore, the video server 10 includes a detection unit 16 that detects a time code of duplicate data that is virtually input from the virtual recording port-21. MPEG moving picture material is played back in frame units, and a time code is added to the header of each frame. The detection unit 16 detects the time code by reading the header of the virtually input MPEG moving picture material.

  The VDCP controller 20 outputs a position request for requesting the recording status of the duplicate data in the removable recording medium 15 and a port status request for requesting the operating status of the virtual recording port-21. When receiving a position request from the VDCP controller 20, the control unit 12 outputs the time code detected by the detection unit 16 to the VDCP controller 20. Further, when receiving the port status request, the control unit 12 confirms the operation status of the virtual recording port-21 and outputs the confirmation result to the VDCP controller 20.

  Hereinafter, the material data copying process of the video server 10 in the above configuration will be described in detail. FIG. 2 is a sequence diagram showing a command sequence of the VDCP controller 20 when the material data recorded in the recording device 11 of the video server 10 according to an embodiment of the present invention is copied to the removable recording medium 15.

  First, the VDCP controller 20 outputs a virtual playback port +21 open command OpenPort (+21) to the video server 10. When the control unit 12 receives the open command OpenPort (+21), the control unit 12 returns a permission response grant to the VDCP controller 20 to open the virtual reproduction port +21. Upon receiving the permission response “grant”, the VDCP controller 20 outputs a virtual playback port +21 select command “Select Port (+21)” to the video server 10. Upon receiving the select command SelectPort (+21), the control unit 12 returns an approval response ack and puts the virtual playback port +21 in the selected state. Upon receiving the approval response ack, the VDCP controller 20 outputs a copy source material designation (reproduction reservation) command PlayCue (C: ¥ 00000001). Upon receiving the copy source material designation command PlayCue (C: ¥ 00000001), the control unit 12 designates the recording device 11 as a storage device for reproducing the material data, designates the address of the material data to be reproduced, and sends an approval response ack. return. As a result, the video server 10 enters a standby state for reproduction processing.

  Subsequently, the VDCP controller 20 outputs a virtual recording port-21 open command OpenPort (-21) to the video server 10. When the control unit 12 receives the open command OpenPort (-21), it returns a permission response grant to the VDCP controller 20 to open the virtual recording port -21. When receiving the permission response grant, the VDCP controller 20 outputs a virtual recording port-21 select command SelectPort (-21) to the video server 10. Upon receiving the select command SelectPort (-21), the control unit 12 returns an approval response ack and puts the virtual recording port -21 into the selected state. When receiving the approval response ack, the VDCP controller 20 outputs a copy destination material designation (recording reservation) command RecordInit (D: ¥ 00000001). Upon receiving the copy destination material designation command RecordInit (D: ¥ 00000001), the control unit 12 designates the removable recording medium 15 as a storage device for recording material data, designates the address of the recording destination, and issues an approval response ack. return. As a result, the video server 10 enters a recording process standby state.

  The VDCP controller 20 outputs a recording start command Record when the video server 10 enters a standby state for reproduction and recording processing. Upon receiving the recording start command Record, the control unit 12 virtually inputs the duplicate data through the virtual recording port-21, starts recording on the removable recording medium 15, and reproduces the material data from the recording device 11 and virtually reproduces it. Virtually output as duplicate data from port-21.

  Further, when outputting the recording start command, the VDCP controller 20 starts outputting a position request PositionRequest and a port status request PortStatusRequest. Both requests are output to the video server 10 non-simultaneously for each frame of material data to be copied (in this embodiment, every 33 ms).

  Upon receiving the position request, the control unit 12 returns the time code detected by the detection unit 16 at the time of recording to the VDCP controller 20 as a position response position, and notifies the position of the material data being duplicated. Upon receiving the port status request, the control unit 12 confirms the operation status of the virtual recording port-21, and if the duplicate data is being recorded, “recording” is indicated, and if the recording is completed, “idle” is indicated. To the VDCP controller 20 as a port status response StateStatus. When receiving the notification that the port status response is “idling”, the VDCP controller 20 recognizes the end of the replication process.

  As described above, in the above-described embodiment, the virtual playback port +21 opened and selected in advance is played from the recording device 11 by the playback reservation command and the playback start command specifying the recording device 11 and the playback material ID. The material data is virtually output as duplicate data from the virtual reproduction port +21. Then, the virtually output duplicate data is virtually input from the virtual recording port-21 by the recording reservation command and the recording start command specifying the removable recording medium 15 and the recording material ID to the virtual recording port-21. Recording is performed on the removable recording medium 15. As a result, the material data can be duplicated with only the reproduction command and recording command from the VDCP controller 20.

  Therefore, the video server 10 according to the present embodiment can copy material data without uniquely defining an extended command in the VDCP protocol and without changing the design of an existing VDCP controller.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the example in which the recorded material data is copied to the removable recording medium 15 has been described. However, the present invention can be similarly applied to another memory in the video server instead of the removable recording medium. .

  In the above embodiment, the example in which the storage device is the recording device 11 and the removable recording medium 15 has been described. However, the type and number of the storage devices are not limited to this example.

  In the above embodiment, an example in which virtual playback ports and virtual recording ports are assigned to ports +21 and -21 has been described. However, if the ports are not used as baseband recording signal ports and playback signal ports, these port numbers are used. It is not necessary to be limited to.

  In the above embodiment, the example in which the detection unit 16 reads only the header of the MPEG moving picture material and detects the time code has been described. However, the time code is read by reading all the data for one frame input to the virtual recording port. Even if it is a case where it detects, it can implement similarly.

  In the above embodiment, the VDCP controller 20 outputs a port status request for requesting the operation status of the virtual recording port-21, and the control unit 12 confirms the operation status of the virtual recording port-21 in response to the request. Although an example of outputting the confirmation result has been described, the VDCP controller 20 outputs a port status request for requesting the operation status of the virtual playback port +21, and the control unit 12 indicates the operation status of the virtual playback port +21 in response to the request. Even if it is a case where it confirms and the confirmation result is output, it can implement similarly. Further, the VDCP controller 20 outputs a port status request for requesting the operation status of the virtual recording port-21 and the virtual playback port +21, and the control unit 12 operates the virtual recording port-21 and the virtual playback port +21 in response to the request. Even in the case where the situation is confirmed and the confirmation result is output, the same can be implemented.

  Furthermore, the present invention can be embodied by modifying the constituent elements without departing from the spirit of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

The block diagram which shows the structure of the video server and VDCP controller which concern on one Embodiment of this invention. The sequence diagram which shows the replication process of the material data in the video server of the said one Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Video server, 11 ... Recording apparatus, 12 ... Control part, 13 ... MPEG encoder, 14 ... MPEG decoder, 15 ... Removal recording medium, 16 ... Detection part, 20 ... VDCP controller, +1 ... Playback signal port, -1 ... Recording signal port, +21 ... Virtual playback port, -21 ... Virtual recording port.

Claims (7)

A plurality of storage devices capable of recording / reproducing material data;
Each outputting material data reproduced from any of the plurality of storage devices, any one of which is specified as virtual output means for virtually outputting the reproduced material data;
Each of which inputs material data recorded in any of the plurality of storage devices, any of which is specified as virtual input means for virtually inputting material data output from the virtual output means Input means;
The input means for inputting the material data among the plurality of input means is designated, and the storage device for recording the material data inputted from the designated input means is designated among the plurality of storage devices, and the material data is designated. Recording control is performed, and a storage device that reproduces material data among the plurality of storage devices is designated, and an output unit that outputs the reproduced material data is designated among the plurality of output units, and the material data is reproduction controlled. And a control unit that
When replicating material data between the plurality of storage devices, the control unit performs reproduction control by designating a storage device that reproduces material data to be replicated and the virtual output unit, and the virtual input unit And a video server that performs recording control by designating a storage device that records the copied material data. When a time code is added to the material data reproduced from the storage device designated as the storage device to be reproduced,
A detection unit that detects a time code of the material data virtually input from the virtual input unit;
When the position request for requesting the recording status of the material data in the storage device designated as the storage device to be recorded is input from the external controller via the communication port, the control unit detects the time detected by the detection unit. The code is output to the external controller via the communication port, and when the status request for requesting the operation status of the virtual input means is input from the external controller via the communication port, the operation status of the virtual input means is confirmed. The video server according to claim 1, wherein the confirmation result is output to an external controller via a communication port. When a time code is added to the material data reproduced from the storage device designated as the storage device to be reproduced,
A detection unit that detects a time code of the material data virtually input from the virtual input unit;
When the position request for requesting the recording status of the material data in the storage device designated as the storage device to be recorded is input from the external controller via the communication port, the control unit detects the time detected by the detection unit. When a status request for outputting the code to the external controller via the communication port and requesting the operation status of the virtual output means is input from the external controller via the communication port, the operation status of the virtual output means is confirmed. The video server according to claim 1, wherein the confirmation result is output to an external controller via a communication port. 2. The video server according to claim 1, wherein recording control and reproduction control of the control unit are performed using a VDCP (Video Disk Communication Protocol) protocol. The video server according to claim 1, wherein any one of the plurality of storage devices is a removable recording medium. Used for video servers that record / playback material data to multiple storage devices,
Identifying virtual output means for virtually outputting the reproduced material data from any of output means for outputting the material data reproduced from any of the plurality of storage devices;
Identifying virtual input means for virtually inputting the material data virtually output from any of the input means for inputting material data recorded in any of the plurality of storage devices;
When duplicating recorded material data among the plurality of storage devices,
The storage device for reproducing the material data and the virtual output means are designated to control the reproduction of the material data, and the virtual input means and the storage device for recording the inputted material data are designated to perform the recording control. A method of copying material data, characterized by: 7. The material data copy method according to claim 6, wherein the recording control and the reproduction control are performed using a VDCP (Video Disk Communication Protocol) protocol.

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