JP2004200803A - Edition system and method of copying av data from av server - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently edit many kinds of AV data accumulated to be edited in an AV server after copying the data in a small-capacity recorder. <P>SOLUTION: A recorder 2 having a sparse function is connected to an edition terminal 1. Based on that the edition terminal 1 designates AV data to be edited, the recorder 2 forms an empty file having an equal quantity of sparse areas to the AV data, an AV server 3 reproduces and sends the AV data to the recorder 2 to write the data into the file in the recorder 2. When no empty capacity in the recorder 2 remains, the reproduce/read is temporarily stopped. When empty areas recover, the reproduce/read is resumed. When the edition terminal 1 determines a required range of the AV data written into the file in the recorder 2 for the edition, a portion of the file in the recorder 2 into which other AV data outside this range are written is taken as sparse areas. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a system and the like for editing a material stored in an AV server with an editing terminal.
[0002]
[Prior art]
Today, broadcasting stations generally store AV (Audio and / or Video) data, which is a material, in a large-capacity AV server.
[0003]
An AV server generally has a RAID (Redundant Arrays of Inexpensive Disks) configured by using a plurality of hard disk drives and has a plurality of input / output ports such as SDI (Serial Digital Interface) ports.
[0004]
AV data sent to the AV server from outside (such as a VTR in a broadcasting station or a video camera at a news gathering site connected to the broadcasting station via a wide area network) is input to one of the input / output ports, and the input / output is performed. The port is subjected to compression processing and the like. Then, the data is sent to the RAID from the input / output port and recorded in the RAID.
[0005]
AV data read from the RAID and sent to one of the input / output ports is subjected to decompression processing or the like at the input / output port. The data is output from the input / output port and sent from the AV server to the outside (on-air server, backup server, or the like).
[0006]
By the way, in a broadcasting station, AV data stored in an AV server is not transmitted as it is on the air, but the AV data is edited by an editing terminal (non-linear editing machine), and the editing result (so-called “complete packet”) is obtained. It is usually sent.
[0007]
Conventionally, as a method for an editing terminal to access AV data stored in an AV server, for example, an input / output port of the AV server and an editing terminal are connected in a one-to-one correspondence, and the connected input / output port is connected to the editing terminal. (For example, see Patent Document 1).
[0008]
[Patent Document 1]
JP-A-8-221951 (paragraph numbers 0003 to 0006, FIG. 3)
[0009]
[Problems to be solved by the invention]
However, this method requires a long access time when reading the jumping frame AV data because the AV data is recorded in a distributed manner on a plurality of hard disk drives in the RAID in the AV server. There was an inconvenience.
[0010]
Since editing work is often performed while jumping and watching a video in frame units, an editing terminal often reads AV data of a jumping frame. In such a case, increasing the access time is very inconvenient.
[0011]
On the other hand, among the AV data stored in the AV server, the AV data to be edited (for example, the AV data transmitted from a video camera at a certain news gathering site to a broadcasting station over a wide area network and stored in the AV server) is transmitted to an editing terminal. If the editing terminal reads the AV data from the internal hard disk and edits the file, the access time can be reduced.
[0012]
However, many editing terminals sequentially edit many types of AV data (for example, AV data sent from many news gathering sites and stored in an AV server). Even when copying AV data to the internal hard disk, if the capacity of the internal hard disk is so small that only some of these many types of AV data can be copied as a file at one time, the copying operation is repeated many times. Therefore, many types of AV data cannot be efficiently edited. Therefore, in order to be able to edit efficiently, the capacity of the internal hard disk must be considerably increased.
[0013]
Also, even if the capacity of the internal hard disk is increased, if the type of AV data that has already been copied as a file is already copied as a file, the editing terminal deletes the file itself to reduce the free space on the internal hard disk. Unless this occurs, a new type of AV data cannot be copied as a file. Therefore, it takes time and effort until copying of a new type of AV data can be started, so that it is impossible to efficiently edit a large number of types of AV data.
[0014]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made in order to efficiently edit a large number of types of AV data stored in an AV server by copying the data to a recording device having a small capacity. It is.
[0015]
[Means for Solving the Problems]
In order to solve this problem, the present applicant has proposed an editing terminal, a recording device connected to the editing terminal and having a sparse function, and an AV data to be edited among the AV data stored in the AV server. First control means for controlling the recording device to create an empty file having a sparse area of an amount equal to the data amount of the designated AV data based on the designation by the editing terminal; The server is controlled so that the designated AV data is reproduced and transmitted to the recording device, and when the recording device runs out of free space, the reproduction is temporarily stopped, and the recording device is again provided with an empty area. Second control means for restarting the reproduction in response to the occurrence of the recording, and controlling the recording device to write the AV data transmitted from the AV server to the file. A third control means for suspending writing when the recording device has run out of free space and resuming writing when the recording device has free space; Based on the fact that the editing terminal has determined the range required for editing among the AV data written in the file, the recording device is controlled to write the AV data other than the range in the file. An editing system comprising: a fourth control unit for making a part a sparse area.
[0016]
In this editing system, a recording device having a sparse function is connected to an editing terminal. The sparse function is a function that can be used in the NTFS5 file system or the like. A sparse file created by this function consumes only the capacity of the blocks actually used (the part where the actual data exists) in the entire file. I do.
[0017]
In the editing system, when there are many types of AV data to be edited, and when the editing terminal specifies each of the various types of AV data, the editing system deletes the various types of AV data. Empty files each having a sparse area equal in amount to the data amount are created in this recording device by the first control means. (At this point, the sum of the logical sizes of those files is equal to the sum of the data amounts of these various types of AV data, but since the sum of the physical sizes of those files is zero, all of these files are recorded in this recording. It can be present in the device.)
[0018]
Then, the second control means and the third control means reproduce the respective types of AV data in the AV server, transmit the data to the recording device, and write the data in the corresponding files in the recording device.
[0019]
When any type of AV data is being written to the file, the total physical size of the file (the total amount of data of the AV data written to the file) has reached the capacity of the recording device. When the free space is exhausted, reproduction and writing of the AV data are temporarily stopped by the second control means and the third control means. However, the AV data written in another file is read from the recording device to the editing terminal, and when the editing terminal determines the range of the AV data required for editing, the fourth control means controls the recording by the fourth control means. A portion of the file in the device in which the AV data (AV data not required for editing) outside the range is written is made a sparse area, so that the amount of the file corresponding to the data amount of the AV data in the sparse area is changed. Since the sum of the physical sizes is reduced, the recording device has free space again. Therefore, reproduction and writing of the temporarily stopped AV data are resumed by the second control means and the third control means.
[0020]
As described above, according to this editing system, of the AV data stored in the AV server, each type of AV data specified by the editing terminal is copied as a sparse file, and thus the AV data stored in the AV server is copied. Among them, many types of AV data to be edited can be copied to a recording device having a small capacity.
[0021]
Even if the recording device runs out of free space in the middle of this copy, the portion of the sparse file in which AV data not required for editing is written is made a sparse area, so that the free space of the recording device is automatically and promptly reduced. And the copy is restarted.
[0022]
Thus, many types of AV data to be edited stored in the AV server can be copied to a small-capacity recording device and edited efficiently.
[0023]
In this editing system, as an example, the second control means controls the AV server based on the fact that the sparse area of the file in the recording device is accessed by the editing terminal, and The third control means controls the recording device based on the fact that the sparse area portion of the file in the recording device has been accessed by the editing terminal, with the AV data to be written in the recorded portion being preferentially reproduced. It is preferable that the AV data be written in priority to the accessed portion.
[0024]
This allows the operator of the editing terminal to edit a specific portion of the AV data to be edited (for example, AV data transmitted from a video camera at a certain news gathering site to a broadcasting station over a wide area network and stored in an AV server). When it is known in advance that the data is necessary for editing, if an operation of accessing a portion of the sparse area of the file in the recording device where the AV data is written is performed, the necessary data of the AV data to be edited is Of the AV data is preferentially copied to the recording device.
[0025]
Therefore, a portion necessary for editing can be quickly copied to the recording device and read from the recording device to the editing terminal, so that editing can be performed more efficiently.
[0026]
Next, based on the fact that the AV data to be edited among the AV data stored in the AV server is specified by the editing terminal, the present applicant creates a recording device connected to this editing terminal and having a sparse function. A first step of controlling to create an empty file having a sparse area of an amount equal to the data amount of the designated AV data; and controlling the AV server to reproduce the designated AV data. A second step of causing the recording device to transmit, suspending reproduction when the recording device has run out of free space, and resuming reproduction when the recording device has a free space again; The recording device is controlled to write the AV data transmitted from the AV server to the file, and that the recording device has run out of free space. A third step of suspending the writing according to the above, and restarting the writing according to the occurrence of the free space in the recording apparatus, and editing the AV data written to the file in the recording apparatus. A fourth step of controlling the recording device based on the necessary range being determined by the editing terminal to make a portion of the file where AV data other than the range is written into a sparse area. A method of copying AV data from a server is proposed.
[0027]
When the AV data stored in the AV server is copied to a recording device and read out from the recording device for editing, if this copying method is adopted, it is performed in exactly the same manner as described above with respect to the editing system according to the present invention. In addition, a large number of types of AV data to be edited stored in an AV server can be copied to a small-capacity recording device and edited efficiently.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings. FIG. 1 shows an overall configuration example of an editing system to which the present invention is applied. This editing system is, for example, a part of a news production system of a broadcasting station. The editing system reads a solid state disk (SSD) 2 for copying AV data stored in an AV server 3 and reads AV data from the SSD 2. And an editing terminal 1 for editing.
[0029]
The editing terminal 1 is configured by a computer such as a workstation. Normal application software (editor) for editing AV data is installed in the editing terminal 1. The editing terminal 1 displays an editing operation screen including the following operation screens (1) to (3) by the editor.
[0030]
(1) An operation screen for displaying a list of AV data stored as files in the AV server 3 and specifying AV data to be edited from the list.
[0031]
(2) On the timeline, the user accesses the frame to refer to the AV data to be edited from a desired frame, and determines a range necessary for editing in the AV data to be edited by the IN point and the OUT point. An operation screen for editing by pasting each determined range in chronological order.
[0032]
(3) An operation screen for registering the editing result (EDL) in the AV server 3.
[0033]
Further, material management software as shown in FIGS. 3 to 5 described later is installed in the editing terminal 1.
[0034]
The SSD 2 is equipped with a solid state memory (SDRAM) having a capacity of 64 gigabytes as a recording medium, and is equivalent to an NTFS5 file system (a file system supported by Windows XP and Windows 2000 ("Windows" is a registered trademark)). This is a storage system equipped with a file system. The SSD 2 has a fiber channel port.
[0035]
The NTFS5 file system can use a sparse function, and the file system mounted on the SSD 2 can also use the sparse function. The sparse file created by this function consumes only the capacity of the blocks actually used (the part where the actual data exists) in the entire file.
[0036]
FIG. 2 shows an outline of the configuration of the AV server 3. The AV server 3 has, as I / O (input / output) ports, an I / O port 12 which is a fiber channel network interface in addition to a plurality of I / O ports 11 which are SDI interfaces.
[0037]
In the AV server 3, these I / O ports 11 and I / O ports 12, RAID 13, and a controller 14 for controlling the entire AV server 3 are connected via a bus 15. A file management unit 16 that creates and manages a file list of AV data recorded in the RAID 13 is connected to the controller 14. Further, the controller 14 can be connected to Ethernet (“Ethernet” is a registered trademark) via the interface 17.
[0038]
AV data is supplied to the AV server 3 from outside (a VTR in a broadcasting station, a video camera at a news gathering site connected to the broadcasting station via a wide area network, or the like). The AV data supplied to the AV server 1 is input to one of the I / O ports 11 and subjected to compression processing and the like at the I / O port 11. Then, the data is sent from the I / O port 11 to the RAID 13 and recorded on the RAID 13.
[0039]
As shown in FIGS. 1 and 2, the editing terminal 1 and the SSD 2 are connected by a fiber channel, and the SSD 2 and the I / O port 12 in the AV server 3 are also connected by the fiber channel. The editing terminal 1 and the controller 14 in the AV server 3 are connected by the Ethernet 4.
[0040]
On the operation screen (1) of the editing terminal 1, the editing terminal 1 communicates with the controller 14 of the AV server 3 via the Ethernet 4 to acquire information in the file management unit 16 as an editor process. , A list is displayed.
[0041]
When any frame is accessed on the timeline of the above-described operation screen (2) of the editing terminal 1, AV data after that frame is read from the SSD 2 to the editing terminal 1 as a process of the editor.
[0042]
FIGS. 3 to 5 are flowcharts showing processing by the material management software installed in the editing terminal 1.
[0043]
The processing in FIG. 3 is performed when the AV data to be edited is specified on the operation screen (1) using the editor in the editing terminal 1 or when the operation screen (2) using the editor in the editing terminal 1 is used. This is a process for controlling the SSD 2 via the fiber channel based on access to the AV data during the editing.
[0044]
This process starts every time new AV data to be edited is specified on the operation screen (1). First, the SSD 2 is caused to create an empty file, and the data of the specified AV data to be edited is An amount of sparse area equal to the amount is created in the file (step S1).
[0045]
Subsequently, it is determined whether or not the SSD 2 has a free space (step S2). If no, step S2 is repeated, and if yes, the specified AV data to be edited transmitted from the AV server 3 is written from the top of this file in the SSD 2 (step S3).
[0046]
Subsequently, it is determined whether or not there is no free space in the SSD2 (step S4), and a frame corresponding to the sparse area of this file in the SSD2 (AV data is still written to the SSD2 on the timeline of the operation screen (2)) (Step S5), and whether the writing of the AV data has been completed up to the end of this file in the SSD 2 (step S6). Repeat until it is yes.
[0047]
If the answer is YES in step S4, the writing of the AV data to this file in the SSD 2 is temporarily stopped (step S7). The determination as to whether or not free space has been created in the SSD 2 again (step S8) is repeated until the determination becomes yes. If the determination is yes, the writing of AV data to this file in the SSD 2 is restarted (step S9). Return to S4.
[0048]
If the answer is YES in step S5, the writing position of the AV data to this file in the SSD 2 is changed to the sparse area corresponding to the frame accessed on the operation screen (2) (step S10). Then, the process returns to step S4. If the answer is YES in step S6, the process ends.
[0049]
The processing in FIG. 4 is performed based on the fact that the AV data to be edited is specified on the operation screen (1) or that the AV data is accessed during the editing on the operation screen (2). 3 is a process of transmitting a control signal to the controller 14 of the AV server 3.
[0050]
This process is started every time a new AV data to be edited is specified on the operation screen (1), similarly to the process of FIG. 3, and first, it is determined whether or not the SSD 2 currently has free space. (Step S11). If no, step S11 is repeated. If yes, the AV server 3 reproduces the specified AV data to be edited from the RAID 13 and transmits it from the I / O port 12 to the SSD 2 (step S12).
[0051]
Next, it is determined whether or not the SSD 2 has run out of free space (step S13), and a frame on which AV data has not yet been reproduced from the AV server 3 on the timeline of the operation screen (2) (ie, the processing in FIG. 3). (Step S14) to determine whether or not the file corresponding to the sparse area of the file in the SSD 2 in which the AV data to be edited is written is accessed (step S14), and the reproduction to the end of the AV data to be edited is completed. (Step S15) is repeated until the answer is YES in any of the steps.
[0052]
If the answer is YES in step S13, the reproduction of the AV data in the AV server 3 is temporarily stopped (step S16). Then, the determination as to whether or not free space has been created again in the SSD 2 (step S17) is repeated until the determination becomes yes. When the determination becomes yes, the reproduction of the AV data on the AV server 3 is restarted (step S18), and the process returns to step S13 Return.
[0053]
If the answer is yes in step S14, the AV server 3 reproduces the AV data after the frame accessed on the operation screen (2) (step S19). Then, the process returns to step S13. If the answer is YES in step S15, the process ends.
[0054]
The processing of FIG. 5 is performed when the editing terminal 1 determines that the range required for editing of the AV data to be edited during the editing on the operation screen (2) is determined by the IN point and the OUT point, and that the editing is completed. Processing for controlling the SSD 2 via the fiber channel or controlling the AV server 3 via the Ethernet 4 based on the operation of registering the edited result in the AV server 3 on the operation screen (3) by the editor in the above It is.
[0055]
In this process, the range required for editing on the timeline of the operation screen (2) is one of the one or more types of AV data to be edited already specified on the operation screen (1). A determination is made as to whether or not the determination is made based on the IN point and the OUT point (step S21), and a determination is made as to whether or not an operation for registering the editing result in the AV server 3 has been performed on the operation screen (3) (step S22). Repeat until yes in any step.
[0056]
If the answer is affirmative in step S21, the SSD 2 is controlled to parse the portion of the file in which the AV data has been written, in which the AV data (AV data unnecessary for editing) other than the range from the IN point to the OUT point has been written. An area is set (step S23). Then, the process returns to step S21.
[0057]
If the answer is YES in step S22, the editing result is transmitted to the AV server 3 and stored in the controller 14 (step S24). Then, the SSD 2 is controlled to delete the file in which the AV data is written (step S25). Then, the process returns to step S21.
[0058]
Next, how the editing terminal 1 edits the AV data stored in the AV server 3 in this editing system will be described.
[0059]
When an operator who operates the editing terminal 1 intends to sequentially edit many types of AV data stored in the AV server 3 (for example, AV data transmitted from a large number of news gathering sites and stored in the AV server), first, In the operation screen (1) described above, all of these many types of AV data are specified as AV data to be edited from a list of displayed AV data lists.
[0060]
Then, in step S1 of the processing in FIG. 3 of the material management software in the editing terminal 1, empty files having a sparse area of the same amount as the data amount of the AV data are stored in the SSD 2 for each of these many types of AV data. Created.
[0061]
FIG. 6 shows, by way of example, a state in which files 101 to 110 are created in the SSD 2 for each of the AV data 101 to 110 when ten types of AV data 101 to 110 are designated as editing targets.
[0062]
At this point, the sum of the logical sizes of the files 101 to 110 is equal to the sum of the data amounts of the AV data 101 to 110 (for example, if the data amount of each of the AV data 101 to 110 is 20 gigabytes, the sum of the logical sizes is However, since the sum of the physical sizes of the files 101 to 110 is zero, the files 101 to 110 can all exist in the SSD 2.
[0063]
Subsequently, these many types of AV data specified on the operation screen (1) are sequentially transmitted to the AV server by the steps S11 to S12 of the processing of FIG. 4 and the steps S2 to S3 of the processing of FIG. 3 of the material management software. 3 and transmitted to SSD2 and written to the corresponding file in SSD2.
[0064]
FIG. 7 is a diagram illustrating an example of a state change after the creation of the file, focusing on one of the files created on the SSD 2 in step S1 of the process of FIG.
[0065]
In the figure, a state A is a state at the time when the file is created (a state in which the entire file is a sparse area). State B is a state in which AV data is written in steps S11 to S12 of the process of FIG. 4 and steps S2 to S3 of the process of FIG.
[0066]
When the operator of the editing terminal 1 accesses the frame in which the AV data has been written to this file in the SSD 2 on the timeline of the operation screen (2) after the state of the state B, the AV data after the frame Is read from the SSD 2 to the editing terminal 1. Therefore, the operator can start editing by referring to the AV data from the frame.
[0067]
State C indicates a state in which the writing of the AV data has been completed up to the end of this file in the SSD 2 (that is, all the AV data to be edited has been copied from the AV server 3 to the SSD 2). In this state C, the operator of the editing terminal 1 can refer to the AV data to be edited up to the last frame.
[0068]
Then, when the operator determines the range necessary for editing on the timeline of the operation screen (2) by the IN point and the OUT point, the state D is displayed in FIG. 7 by steps S21 and S23 of the processing of FIG. As shown in the above, a portion of this file in the SSD 2 where AV data (AV data not required for editing) other than the range from the determined IN point to the OUT point is written is set as a sparse area.
[0069]
As a result, the free space of the SSD 2 automatically and promptly increases by this sparse area.
[0070]
Thereafter, when the operator finishes editing by pasting on the timeline of the operation screen (2) and performs an operation of registering the edited result on the operation screen (3), the processing of the material management software in FIG. In steps S22 and S24 to S25, the editing result is registered in the AV server 3 and the file in the SSD 2 is deleted as shown as a state E in FIG. 7, so that the free space of the SSD 2 further increases.
[0071]
In state B, the physical size of this file in SSD2 (the amount of AV data written to this file) and the physical size of the file in the SSD2 for which the writing of AV data has been completed earlier (written to those files). When the total sum of the data and the amount of AV data reaches the capacity of the SSD 2, the steps S13 and S16 of the processing of FIG. 4 and steps S4 and S7 of the processing of FIG. The writing of the AV data is suspended.
[0072]
However, when the operator determines the range required for editing on the timeline of the operation screen (2) by the IN point and the OUT point with respect to the AV data of the file to which writing has been completed earlier, the file which has been written earlier is determined. The portion where the AV data is written outside the range from the IN point to the OUT point is set as a sparse area (steps S21 and S23 in the process of FIG. 5), so that the free space of the SSD 2 is automatically adjusted by the sparse area. And it increases quickly.
[0073]
Therefore, from step S16 of the process of FIG. 4 and step S7 of the process of FIG. 3, the process immediately proceeds to steps S17 to S18 of the process of FIG. 4 and steps S8 to S9 of the process of FIG. The writing of the AV data is restarted.
[0074]
FIG. 8 is a diagram illustrating another example of the state change after the creation of the file, focusing on one of the files created on the SSD 2 in step S1 of the process of FIG.
[0075]
7, states A, B, E, and F are states respectively corresponding to states A, B, D, and E in the example of FIG.
[0076]
In the state B of FIG. 8, after the AV data is written from the first frame to the frame F1 in the file in the SSD2, the operator of the editing terminal 1 requests the AV data of the portion from the frame F1 to the frame before the frame F2. Since it is known that the frame F2 is unnecessary for editing, if a frame F2 (a frame on which AV data has not yet been written to a file in the SSD2) is accessed on the timeline of the operation screen (2), the process in FIG. 3 and steps S5 and S10 in the process of FIG. 3, the portion from the frame F1 to the frame immediately before the frame F2 is skipped, and the AV data after the frame F2 is reproduced from the AV server 3, and the data in the file in the SSD 2 is The writing position of the AV data is changed to the sparse area corresponding to the frame F2. .
[0077]
State C in FIG. 8 shows a state in which the write position of the AV data to the file in the SSD 2 has been changed in this way. As a result, the AV data after the frame F2 is preferentially read out from the SSD 2 to the editing terminal 1, so that the operator can quickly edit by referring to the AV data after the frame F2.
[0078]
State D in FIG. 8 shows a state in which the writing of the AV data is completed up to the end of this file in the SSD 2 after the writing position is changed in this way.
[0079]
As described above, according to this editing system, of the AV data stored in the AV server 3, each type of AV data specified by the editing terminal 1 is copied as a sparse file. Of the AV data obtained, many types of AV data to be edited can be copied to the SSD 2 having a small capacity.
[0080]
Even if there is no free space in the SSD 2 during this copy, the portion of the sparse file in which AV data not required for editing is written becomes a sparse area, so that the free space of the SSD 2 automatically and quickly increases. Then, copying is resumed.
[0081]
Thus, a large number of types of AV data to be edited stored in the AV server 3 can be copied to the SSD 2 having a small capacity and edited efficiently by the editing terminal 1.
[0082]
Further, according to this editing system, as illustrated as a state C in FIG. 8, the operator of the editing terminal 1 sends the AV data to be edited (for example, the AV data is sent from a video camera at a certain news gathering site to a broadcasting station via a wide area network). In the case where it is known in advance that the AV data of a specific portion of the AV data stored in the AV server 3 is necessary for editing, the AV data is written in the sparse area of the file in the SSD 2. When an operation of accessing a part is performed, the necessary part of the AV data to be edited is preferentially copied to the SSD 2.
[0083]
Therefore, a portion required for editing can be quickly copied to the SSD 2 and read out from the SSD 2 to the editing terminal 1, so that editing can be performed more efficiently.
[0084]
In the above example, when a frame in which AV data has not yet been written to a file in the SSD 2 is accessed on the operation screen (2), the AV data after that frame is preferentially written to the file in the SSD 2 to the end. (Steps S14 and S19 of the processing of FIG. 4, steps S5 and S10 of the processing of FIG. 3, and states C and D of FIG. 8). However, as another example, by accessing two frames (start frame and end frame) for which AV data has not yet been written to the file in the SSD 2 on the operation screen (2), the start frame to the end frame are accessed. The AV data may be preferentially written to a file in the SSD 2.
[0085]
In the above example, the material management software is installed in the editing terminal 1 itself. However, as another example, the material management software is installed on a computer different from the editing terminal 1, and the editing terminal 1 transfers to the computer from the editing terminal 1 based on the operations of the operation screens (1) to (3) of FIG. 5 may be requested.
[0086]
Thereby, since the processing for copying the AV data from the AV server 3 to the SSD 2 is all performed by the other computer, the load on the editing terminal 1 is reduced.
[0087]
In the above example, the AV data stored in the AV server is copied to the SSD. However, the present invention is not limited to this, and the AV data stored in the AV server may be copied to a recording device other than the SSD and having a sparse function.
[0088]
Further, the AV server to which the AV data is copied according to the present invention is not limited to the configuration shown in FIG. 2, but may be any existing AV server. For example, when copying AV data stored in an AV server that does not have a fiber channel network interface to SSD2, the AV server is connected to a gateway terminal using SDI or the like, and the gateway terminal is connected to SSD2 using fiber channel. What should I do?
[0089]
Further, the present invention is not limited to the above-described example, and it is needless to say that various other configurations can be adopted without departing from the gist of the present invention.
[0090]
【The invention's effect】
As described above, according to the present invention, among the AV data stored in the AV server, each type of AV data specified by the editing terminal is copied as a sparse file, so that the AV data stored in the AV server is copied. Among them, many types of AV data to be edited can be copied to a recording device having a small capacity.
[0091]
Even if the recording device runs out of free space in the middle of this copy, the portion of the sparse file in which AV data not required for editing is written is made a sparse area, so that the free space of the recording device is automatically and promptly reduced. And the copy is restarted.
[0092]
Therefore, there is an effect that a large number of types of AV data to be edited stored in the AV server can be copied to a small-capacity recording device and edited efficiently.
[0093]
Further, according to the present invention, when the operator of the editing terminal knows in advance that a specific portion of the AV data to be edited is necessary for editing, the sparse area of the file in the recording device is used. When an operation of accessing a portion where the AV data is written is performed, the necessary portion of the AV data to be edited is preferentially copied to the recording device.
[0094]
Therefore, the portion required for editing can be quickly copied to the recording device and read from the recording device to the editing terminal, so that the effect of being able to edit more efficiently can be obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing an editing system to which the present invention is applied.
FIG. 2 is a diagram showing a configuration of the AV server of FIG. 1;
FIG. 3 is a flowchart showing processing by material management software in the editing terminal of FIG. 1;
FIG. 4 is a flowchart showing processing by material management software in the editing terminal of FIG. 1;
FIG. 5 is a flowchart showing processing by material management software in the editing terminal of FIG. 1;
FIG. 6 is a diagram illustrating a file created on the SSD in FIG. 1;
FIG. 7 is a diagram illustrating an example of a state change of a file created in the SSD in FIG. 1;
FIG. 8 is a diagram showing another example of a state change of a file created in the SSD in FIG. 1;
[Explanation of symbols]
1 editing terminal, 2 solid state disk, 3 AV server, 4 Ethernet, 11, 12 I / O port, 13 RAID, 14 controller, 15 bus, 16 file management unit, 17 interface

Claims (4)

Editing terminal,
A recording device connected to the editing terminal and having a sparse function,
Based on the fact that AV data to be edited among the AV data stored in the AV server is specified by the editing terminal, the recording device is controlled to have a sparse area of an amount equal to the data amount of the specified AV data. First control means for creating an empty file having
The AV server is controlled to reproduce the designated AV data and transmit the reproduced AV data to the recording device. At the same time, when the recording device runs out of free space, the reproduction is temporarily stopped, and the recording device is re-transmitted. Second control means for restarting reproduction in response to the occurrence of an empty area;
The recording device is controlled so that the AV data transmitted from the AV server is written in the file, and the writing is temporarily stopped when the recording device runs out of free space. Third control means for restarting writing in response to the occurrence of an area;
On the basis of the fact that the editing terminal has determined the range required for editing among the AV data written to the file in the recording device, the recording device is controlled to control the AV data other than the range in the file. And a fourth control unit for setting a portion in which the character is written as a sparse area. The editing system according to claim 1,
The second control means controls the AV server based on that a sparse area portion of the file is accessed by the editing terminal, and gives priority to AV data to be written in the accessed portion. To play,
The third control means controls the recording device based on that a sparse area portion of the file is accessed by the editing terminal, and writes AV data in priority to the accessed portion. A system for editing AV data from an AV server. Based on the fact that the AV data to be edited among the AV data stored in the AV server is specified by the editing terminal, the recording device connected to the editing terminal and having the sparse function is controlled, and the specified A first step of creating an empty file having a sparse area of an amount equal to the data amount of the AV data;
The AV server is controlled to reproduce the designated AV data and transmit the reproduced AV data to the recording device. At the same time, when the recording device runs out of free space, the reproduction is temporarily stopped, and the recording device is re-transmitted. A second step of resuming playback in response to the occurrence of free space;
The recording device is controlled so that the AV data transmitted from the AV server is written in the file, and the writing is temporarily stopped when the recording device runs out of free space. A third step of restarting writing in response to the occurrence of the area;
On the basis of the fact that the editing terminal has determined the range required for editing among the AV data written to the file in the recording device, the recording device is controlled to control the AV data other than the range in the file. And a fourth step of converting the portion in which the data has been written into a sparse area. 4. The method of copying AV data from an AV server according to claim 3,
In the second step, based on the fact that the sparse area portion of the file has been accessed by the editing terminal, the AV server is controlled to give priority to the AV data to be written to the accessed portion. Play it,
In the third step, based on the fact that the sparse area portion of the file has been accessed by the editing terminal, the recording device is controlled to write the AV data in priority to the accessed portion. A method of copying AV data from an AV server.

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