JP2004274506A - Semiconductor storage device and edit system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a semiconductor storage device not incurring upsizing and complicatedness of an edit system even when the storage device is employed for the edit system wherein a plurality of terminals edit sources stored in an AV server. <P>SOLUTION: The semiconductor storage device 1 includes: a plurality of input output interfaces 2(1) to 2(n); a semiconductor memory 5; a memory control means 4 for controlling the semiconductor memory 5; and processing means 3(1) to 3(n) for converting a logical address into a physical address of the semiconductor memory 5 on the basis of input of an access request for designating the logical address to the input output interfaces 2(1) to 2(n) and accessing an area of the converted physical address of the semiconductor memory 5 via the memory control means 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a semiconductor storage device and an editing system using the semiconductor storage device.
[0002]
[Prior art]
Today, broadcasting stations generally store AV data (video data and audio data) as materials 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 synchronous input / output ports typified by an SDI (Serial Digital Interface). .
[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 SDI input / output ports, and is sent to the SDI input / output port. A compression process is performed at the input / output port. Then, the data is sent to the RAID from the SDI input / output port and recorded on the RAID.
[0005]
AV data read from the RAID and sent to one of the SDI input / output ports is subjected to decompression processing or the like at the SDI input / output port. The data is output from the SDI input / output port and sent from the AV server to the outside (on-air server, backup server, etc.).
[0006]
By the way, in a broadcasting station, instead of transmitting the material stored in the AV server as it is on the air, the material is edited by an editing terminal (a non-linear editing machine using a computer) and the editing result (so-called “complete packet”) Is generally transmitted when a program is broadcast.
[0007]
In a broadcasting station, it is often necessary to edit various materials stored in one AV server simultaneously and in parallel with a plurality of editing terminals.
[0008]
As an editing system for editing a material stored in an AV server with a plurality of editing terminals, as shown in the following (a) and (b), the AV server and the editing terminal are directly connected, and the editing terminal is directly connected to the AV server. There is a system that reads materials.
[0009]
(A) As illustrated in FIG. 1, editing terminals 60 (1) to 60 (n) are connected to a plurality of SDI input / output ports (not shown) of the AV server 50 in a one-to-one correspondence, and each editing terminal is connected. The terminals 60 (1) to 60 (n) output AV data from the corresponding SDI input / output ports (for example, see Patent Document 1).
[0010]
(B) When the AV server has a network interface, the AV server and each editing terminal are connected via a network, and each editing terminal transmits AV data from the AV server via the network.
[0011]
[Patent Document 1]
JP-A-8-221951 (paragraph numbers 0003 to 0006, FIG. 3)
[0012]
[Problems to be solved by the invention]
[0013]
However, in such a system in which the AV server and the editing terminal are directly connected, when a large number of editing terminals attempt to read the material at the same time, the processing load on the AV server increases or the network bandwidth becomes insufficient. Or so, it takes time to read.
[0014]
For example, when producing a news program, the materials stored in the AV server must be quickly edited within a limited time until the scheduled on-air time. In such a case, it takes a long time to read the material, which is very inconvenient.
[0015]
On the other hand, a semiconductor storage device having a large-capacity semiconductor memory such as an SDRAM is connected to each editing terminal, and a material to be edited is transferred from the AV server to this semiconductor storage device by a gateway terminal or the like, and each editing terminal is edited. If the terminal edits the material in the semiconductor storage device, the editing terminal does not directly read the material from the AV server, so that the editing can be performed quickly.
[0016]
However, in a conventional semiconductor memory device, data is read and written based on an external access request that directly specifies a physical address of a semiconductor memory in the semiconductor memory device. Therefore, when a computer requests access to a semiconductor memory device, the physical address of the semiconductor memory is directly specified.
[0017]
When directly specifying the physical address of the semiconductor memory as described above, after data is written in the semiconductor memory based on an access request from a certain computer, an access request specifying a duplicated physical address from another computer is performed. When data is written to the semiconductor memory based on the above, the data written first is destroyed.
[0018]
Therefore, as a connection form between the semiconductor memory device and the computer, conventionally, a form in which the semiconductor memory device is connected to only one computer as shown in FIG. 70 is connected to one computer 80, and FIGS. B and C are forms in which the semiconductor memory devices 70 and 71 are connected to one computer 80, respectively.
[0019]
However, when such a connection form is applied to an editing system, a separate semiconductor storage device is connected to each editing terminal (computer). Therefore, when the number of editing terminals is large, the number of semiconductor storage devices is also increased. The system becomes large and complicated.
[0020]
On the other hand, as a connection form between a computer and a semiconductor storage device, conventionally, as shown in FIG. 3, a semiconductor storage device 70 is connected to a plurality of computers 80 (1) to 80 (n), and A control computer 90 for controlling access to the semiconductor memory device 70 from (1) to 80 (n) is provided, and each of the computers 80 (1) to 80 (n) specifies The physical address to be transmitted to the computer 90 is transmitted to the computer 90 such that the same area of the semiconductor memory in the semiconductor memory device 70 is not accessed by two or more computers 80 (1) to 80 (n). Some have exclusive control of a dynamic address.
[0021]
However, even if the connection form as shown in FIG. 3 is applied to the editing system, a control computer must be provided in addition to the editing terminal, so that the system becomes large and complicated.
[0022]
As described above, when a conventional semiconductor storage device is used in an editing system for editing materials stored in an AV server using a plurality of editing terminals, editing can be performed quickly, but the system becomes larger.・ It becomes complicated.
[0023]
In view of the above, the present invention provides a semiconductor memory device that does not increase the size and complexity of the system even when used in an editing system that edits materials stored in an AV server with a plurality of editing terminals, An object of the present invention is to provide an editing system using a device.
[0024]
[Means for Solving the Problems]
In order to solve this problem, the present applicant has disclosed a plurality of input / output interfaces, a semiconductor memory, a memory control means for controlling the semiconductor memory, and an access request specifying a logical address input to these input / output interfaces. Processing means for converting the logical address into a physical address of the semiconductor memory on the basis of the above, and accessing the area of the converted physical address of the semiconductor memory via the memory control means. Suggest.
[0025]
In this semiconductor memory device, when an access request that specifies a logical address, instead of an access request that directly specifies a physical address of a semiconductor memory, is input to any of a plurality of input / output interfaces, the processing unit The logical address is converted to a physical address of the semiconductor memory, and an area of the converted physical address of the semiconductor memory is accessed.
[0026]
Therefore, different computers are connected to the plurality of input / output interfaces, respectively, and by making access requests each specifying a logical address from each computer, the logical addresses are converted into physical addresses of non-overlapping areas of the semiconductor memory. Since data can be written by conversion, data destruction can be prevented.
[0027]
As described above, even when a plurality of computers are connected, this semiconductor memory device does not require a computer such as the control computer 90 illustrated in FIG. 3 that controls access to the semiconductor memory device. In addition, data destruction can be prevented.
[0028]
Thus, for example, in an editing system for editing a material stored in an AV server with a plurality of editing terminals, this semiconductor storage device is connected to each editing terminal, and the AV server sends the semiconductor storage device to the semiconductor storage device for editing at each editing terminal. If the editing terminal transfers the material and the editing terminal edits the material in the semiconductor storage device, the editing can be quickly performed at each editing terminal without increasing the size and complexity of the system. Become like
[0029]
In this semiconductor memory device, this processing means, as an example, writes the data size based on the fact that a file storage request specifying a logical address corresponding to the data size is input to the input / output interface. Causing the memory control means to search for a free area in the semiconductor memory corresponding to the above, and, based on the existence of this free area, requesting the transmission source of the storage request to transmit the data of this file via the input / output interface. Processing, processing for writing the data of this file received via the input / output interface to this free area of the semiconductor memory by the memory control means, and storing the address of this free area of the semiconductor memory in association with this file. It is preferable to execute the processing.
[0030]
Further, in the semiconductor memory device, as an example, it is preferable to provide a plurality of the processing means in a one-to-one correspondence with each input / output interface. Thereby, the processing based on the access requests input to the respective input / output interfaces is performed simultaneously and in parallel by different processing means, respectively, so that the reading and writing of data based on the access requests from a plurality of computers is performed in a shorter time. Become like
[0031]
Next, the applicant assigns storage means for storing a material, a semiconductor storage device, transfer means for transferring the material stored in the storage means to the semiconductor storage device, and material transferred to the semiconductor storage device. The semiconductor memory device includes a plurality of input / output interfaces, a plurality of input / output interfaces, a semiconductor memory, a memory control means for controlling the semiconductor memory, and an access request specifying a logical address. Processing means for converting the logical address into a physical address of the semiconductor memory based on the input to these input / output interfaces, and accessing the area of the converted physical address of the semiconductor memory via the memory control means The transfer means and each editing terminal are connected to separate input / output interfaces of the semiconductor memory device, respectively. And which proposes those so as to transmit an access request specifying a logical address to the semiconductor memory device.
[0032]
This editing system edits a material stored in a storage means (for example, an AV server) with a plurality of editing terminals. A transfer means (for example, a gateway terminal) for transferring data to the storage device is connected to each editing terminal, and the transfer means and each editing terminal transmit an access request specifying a logical address to the semiconductor storage device. is there.
[0033]
According to this editing system, based on the transfer means connected to the semiconductor storage device and the access request specifying each logical address from each editing terminal, the semiconductor storage device makes the physical addresses of the areas not overlapping each other the logical addresses. Since data can be written by converting the data into the data, the destruction of data can be prevented without providing a transfer means and a computer for controlling access of each editing terminal to the semiconductor memory device.
[0034]
As a result, the editing can be quickly performed at each editing terminal without increasing the size and complexity of the system.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings. FIG. 4 is a block diagram showing a configuration example of a semiconductor memory device according to the present invention. The semiconductor storage device 1 is provided with n (four or more) fiber channel (Fibre Channel) input / output interfaces 2 (1) to 2 (n). Therefore, in the semiconductor memory device 1, n computers 80 (1) to 80 (n) can be connected to the input / output interfaces 2 (1) to 2 (n), respectively.
[0036]
The semiconductor memory device 1 includes CPUs 3 (1) to 3 (n) corresponding to the input / output interfaces 2 (1) to 2 (n) on a one-to-one basis, a CPU 4 for controlling a semiconductor memory, and a semiconductor memory. 5 (for example, SDRAM having a capacity of several tens of gigabytes).
[0037]
Each of the CPUs 3 (1) to 3 (n) (hereinafter simply referred to as CPU 3) executes processing as shown in FIG. In this processing, first, a logical address (for example, a data size of p megabytes) corresponding to the data size is provided to the corresponding input / output interface 2 (1) to 2 (n) (hereinafter simply referred to as input / output interface 2). (If there is an address 0-p), a determination is made as to whether or not a file save request is input (step S1), and whether or not a file read request is input to the input / output interface 2 (step S2). And whether or not a file deletion request has been input to the input / output interface 2 (step S3) is repeated until the answer in any step is YES.
[0038]
If the answer is YES in step S1, the CPU 4 notifies the CPU 4 serving as the control CPU of the semiconductor memory 5 of the data size, and requests the CPU 4 to search for a free area of the semiconductor memory 5 according to the data size (step S4).
[0039]
Upon receiving this request, the CPU 4 searches an unused storage area of the semiconductor memory 5 for an area corresponding to the data size. For example, as shown in FIG. 6, in the storage area of the semiconductor memory 5, data of a file is stored in an area of addresses 0 to x and addresses (x + 1) to (x + y), respectively. If the area is not used, an area corresponding to the data size is searched from the area after the address (x + y + 1).
[0040]
Subsequently, the CPU 4 determines whether a free area corresponding to the data size has been found (step S5). If yes, the computer (for example, the CPU 3 (1) connected to the input / output interface 2 (1) for the transmission source of the storage request via the input / output interface 2; A request is made to the computer 80 (1)) to transmit the data of the file requested to be saved (step S6).
[0041]
Subsequently, the data of the file received via the input / output interface 2 is sent to the CPU 4, and the CPU 4 is requested to write the data to the empty area of the semiconductor memory 5 found in step S5 (step S7).
[0042]
Subsequently, the address of the empty area of the semiconductor memory 5 is stored in association with the file (step S8). Then, via the input / output interface 2, the completion of the storage is notified to the transmission source computer of the storage request (step S 9), and the process returns to step S 1.
[0043]
If NO in step S5 (if no free area is found), the computer that transmitted the file storage request is notified that data cannot be written (step S10), and the process returns to step S1.
[0044]
If the answer is YES in step S2, the address of the semiconductor memory 5 corresponding to the file requested to be read (the address stored in step S8 when the file is saved) is designated, and the data from the area of the address in the semiconductor memory 5 is specified. Is requested to the CPU 4 (step S11).
[0045]
Then, the data read from the semiconductor memory 5 by the CPU 4 is transmitted to the computer that has transmitted the read request via the input / output interface 2 (step S12), and the process returns to step S1.
[0046]
If the answer is YES in step S3, the address of the semiconductor memory 5 corresponding to the file requested to be deleted (the address stored in step S8 when the file is saved) is designated, and the data in the area of the address in the semiconductor memory 5 is specified. A request is made to the CPU 4 for erasure (step S13).
[0047]
When the data is deleted, the deletion request is notified to the computer that transmitted the deletion request via the input / output interface 2 (step S14), and the process returns to step S1.
[0048]
In the semiconductor memory device 1, an access request that specifies a logical address, instead of an access request that directly specifies a physical address of the semiconductor memory 5, is sent to one of the input / output interfaces 2 (1) to 2 (n). , The logical address is converted to a physical address of the semiconductor memory 5 by a CPU provided corresponding to the input / output interface of the CPUs 3 (1) to 3 (n). The area of the converted physical address of the semiconductor memory 5 is accessed.
[0049]
Therefore, separate computers 80 (1) to 80 (n) are connected to the input / output interfaces 2 (1) to 2 (n) as illustrated in FIG. ), The logical addresses are converted into physical addresses in non-overlapping areas of the semiconductor memory 5 and data can be written. Therefore, the data is destroyed. Can be prevented.
[0050]
As described above, even when a plurality of computers are connected, the semiconductor storage device 1 can prevent data destruction without providing a computer for controlling access to the semiconductor storage device 1 by those computers. .
[0051]
Thus, for example, in an editing system that edits materials stored in an AV server with a plurality of editing terminals, the semiconductor storage device 1 is connected to each editing terminal, and the AV server edits the semiconductor storage device 1 with each editing terminal. By transferring the target material and allowing each editing terminal to edit the material in the semiconductor storage device 1, the editing can be quickly performed at each editing terminal without increasing the size and complexity of the system. become able to.
[0052]
Further, since a plurality of CPUs 3 executing the processing shown in FIG. 5 are provided in one-to-one correspondence with each input / output interface 2, processing based on an access request input to each input / output interface 2 can be performed. Since each of the CPUs 3 is simultaneously performed in parallel, reading and writing of data based on access requests from a plurality of computers is performed in a shorter time.
[0053]
Next, FIG. 7 is a block diagram showing a configuration example of an editing system according to the present invention. This editing system includes the above-described semiconductor storage device 1 according to the present invention, three editing terminals 11 (1) to 11 (3), a gateway terminal 12, an AV server 13, and a database 19. .
[0054]
The editing terminals 11 (1) to 11 (3) are each constituted by a computer such as a workstation, and are connected to the input / output interfaces 2 (1) to 2 (3) (FIG. 4) of the semiconductor storage device 1 by fiber channels. Connected.
[0055]
Application software for editing AV data is installed in each of the editing terminals 11 (1) to 11 (3) (hereinafter simply referred to as the editing terminal 11). With this software, an editing operation screen including the following operation screens (1) to (3) is displayed on each editing terminal 11.
[0056]
(1) An operation screen for transferring the AV data file to be edited to the semiconductor storage device 1 by referring to the index data of the AV data file stored in the AV server 13 from the database 19.
[0057]
(2) An operation screen for reading and editing AV data in the semiconductor storage device 1 (for determining an in-point / out-point, pasting on a timeline, and the like).
(3) An operation screen for writing edited AV data to the semiconductor storage device 1.
[0058]
In the AV server 13, input / output ports 14 (1) to 14 (n) of the SDI standard, a controller 15 for controlling the entire AV server 13, and a RAID 16 are connected by a bus 17. Although not shown, each of the input / output ports 14 (1) to 14 (n) includes an encoder and a decoder of a predetermined encoding system (for example, MPEG2).
[0059]
The gateway terminal 12 is composed of a computer such as a workstation, is connected to the input / output interface 2 (4) of the semiconductor storage device 1 via a fiber channel, and is connected to the input / output port 14 (1) of the AV server 13. It is connected.
[0060]
AV data supplied to the AV server 13 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 output from the input / output ports 14 (2) to 14 (n). , And compressed by the encoder of the input / output port, sent to the RAID 16 via the bus 17, and recorded on the RAID 16 as a file.
[0061]
Index data (file name, recording date and time information, still image data of a scene change portion, etc.) of the AV data file thus accumulated in the AV server 13 is sent from the host device (not shown) to the database 19. It is memorized.
[0062]
Each editing terminal 11, gateway terminal 12, and database 19 are connected by an Ethernet 18.
[0063]
In this editing system, the following operations are performed based on the operations of the above-described operation screens (1) to (3) by the operator of each editing terminal 11.
[0064]
First, when the transfer of the AV data file to be edited to the semiconductor storage device 1 is instructed on the operation screen (1) of any of the editing terminals 11, the editing terminal 11 sends the information to the gateway terminal 12. A request to transfer the AV data file to the semiconductor storage device 1 is sent via the Ethernet 18.
[0065]
Upon receiving the transfer request, the gateway terminal 12 causes the AV server 13 to transmit the AV data of the file to the gateway terminal 12 via the input / output port 14 (1). Then, a request to save a file specifying a logical address (for example, addresses 0 to p if the data size is p megabytes) according to the data size of the AV data is sent to the input / output interface 2 (4) of the semiconductor memory device 1. Send to
[0066]
In the semiconductor memory device 1, based on the storage request, the CPUs 3 (4) provided corresponding to the input / output interface 2 (4) execute steps S1, S4 to S5 of the processing in FIG. If there is a free area corresponding to the data size, the gateway terminal 12 is requested to transmit the data of the file for which the storage was requested (steps S5 and S6).
[0067]
The gateway terminal 12 sends the AV data sent from the AV server 13 to the input / output interface 2 of the semiconductor storage device 1 based on this request. In the semiconductor storage device 1, the CPU 3 (4) writes the AV data to the semiconductor memory 5, and notifies the gateway terminal 12 that the storage is completed (steps S7 to S9 in FIG. 5). Thus, the AV data file specified by the operator is transferred from the AV server 13 to the semiconductor storage device 1.
[0068]
Subsequently, when an operation of reading AV data in the semiconductor storage device 1 is performed on the operation screen (2) of the editing terminal 11, the editing terminal 11 issues a read request of the file to the semiconductor storage device 1. 1 input / output interface 2 (input / output interface 2 (1) for editing terminal 11 (1), input / output interface 2 (2) for editing terminal 11 (2), and input / output interface 2 (2) for editing terminal 11 (3) I / O interface 2 (3)).
[0069]
In the semiconductor memory device 1, based on the read request, the CPU 3 provided for the input / output interface 2 (if the input / output interface 2 (1) is the CPU 3 (1) or the input / output interface 2 (2)). For example, steps S2, S11 to S12 of the processing in FIG. 5 are executed by the CPU 3 (2), and by the CPU 3 (3) in the case of the input / output interface 2 (3). As a result, the AV data is sent from the semiconductor storage device 1 to the editing terminal 1, so that the AV data can be edited by operating the operation screen of (2) described above.
[0070]
Thereafter, when an operation of writing the edited AV data to the semiconductor storage device 1 is performed on the operation screen (3) of the editing terminal 11, the editing terminal 11 reduces the data size of the edited AV data to the data size of the edited AV data. A request to save a file specifying the corresponding logical address is sent to the input / output interface 2 of the semiconductor memory device 1.
[0071]
In the semiconductor storage device 1, based on the storage request, the CPU 3 provided corresponding to the input / output interface 2 executes steps S1, S4 to S5 of the processing in FIG. If there is a free space corresponding to the data size, the editing terminal 11 is requested to transmit the data of the file for which the storage request has been made (steps S5 and S6).
[0072]
The editing terminal 11 sends the edited AV data to the input / output interface 2 of the semiconductor storage device 1 based on this request. In the semiconductor storage device 1, the edited AV data is written to the semiconductor memory 5 by the CPU 3 provided corresponding to the input / output interface 2, and the editing terminal 11 is notified that the saving is completed (FIG. 5 Steps S7 to S9). As a result, the edited AV data is written to the semiconductor storage device 1.
[0073]
As described above, according to the editing system, the semiconductor storage device 1 changes the logical addresses based on the access requests specifying the respective logical addresses from the gateway terminal 12 and each editing terminal 11 connected to the semiconductor storage device 1. Since the data is converted into physical addresses of non-overlapping areas of the semiconductor memory 5 and data is written, the gateway terminal 12 and each editing terminal 11 do not need a computer for controlling access to the semiconductor storage device 1 without providing a computer. Destruction can be prevented.
[0074]
Thus, the editing can be quickly performed at each editing terminal 11 without increasing the size and complexity of the system.
[0075]
Further, the processes based on the access requests input from the gateway terminal 12 and the respective editing terminals 11 to the respective input / output interfaces 2 of the semiconductor memory device 1 are performed simultaneously and in parallel by the respective separate CPUs 3. Reading and writing of data in the semiconductor storage device 1 based on an access request from the terminal 11 is performed in a shorter time, and as a result, editing can be performed more quickly.
[0076]
In the above example, the semiconductor memory device 1 is provided with fiber channel input / output interfaces 2 (1) to 2 (n). However, the present invention is not limited to this, and a plurality of input / output interfaces other than the fiber channel may be provided in the semiconductor storage device 1.
[0077]
In the example of FIG. 7, the AV data stored in the AV server 13 is transferred to the semiconductor storage device 1 via the gateway terminal 12 which is another device different from the AV server 13. However, for example, when the AV server 13 has a fiber channel interface and an Ethernet interface, the AV server 13 is connected to the input / output interface 2 of the semiconductor storage device 1 via the fiber channel, and the AV server 13 is connected to the Ethernet server. 18 and sends a transfer request from the editing terminal 1 to the controller 16 in the AV server 13 via the Ethernet 18 (the controller 16 sends AV data to the semiconductor storage device 1 via the fiber channel in response to this request). ).
[0078]
In the example of FIG. 7, the semiconductor storage device according to the present invention is used for an editing system. However, the semiconductor storage device according to the present invention may be used not only in an editing system but also in any system in which a plurality of computers request access to the semiconductor storage device.
[0079]
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.
[0080]
【The invention's effect】
As described above, according to the semiconductor memory device of the present invention, even if a plurality of computers are connected, data destruction can be prevented without providing a computer for controlling access to the semiconductor memory device by those computers. The effect is obtained.
[0081]
Thus, for example, in an editing system for editing a material stored in an AV server with a plurality of editing terminals, this semiconductor storage device is connected to each editing terminal, and the AV server sends the semiconductor storage device to the semiconductor storage device for editing at each editing terminal. If the editing terminal transfers the material and the editing terminal edits the material in the semiconductor storage device, the editing can be quickly performed at each editing terminal without increasing the size and complexity of the system. Become like
[0082]
Further, since processing based on access requests input to each input / output interface is performed simultaneously and in parallel by separate processing means, data read / write based on access requests from a plurality of computers is performed in a shorter time. The effect is obtained.
[0083]
Next, according to the editing system according to the present invention, in an editing system for editing materials stored in storage means (for example, an AV server) with a plurality of editing terminals, without increasing the size and complexity of the system, The effect is obtained that editing can be performed quickly at the editing terminal.
[0084]
Furthermore, since processing based on access requests input to the respective input / output interfaces of the semiconductor memory device is performed simultaneously and in parallel by separate processing means, data can be read and written in the semiconductor memory device in a shorter time, As a result, an effect is obtained that editing can be performed more quickly.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an editing system in which an AV server and a plurality of editing apparatuses are directly connected.
FIG. 2 is a diagram showing a connection form between a conventional semiconductor memory device and a computer.
FIG. 3 is a diagram showing a connection form between a conventional semiconductor memory device and a computer.
FIG. 4 is a block diagram showing a configuration of a semiconductor memory device according to the present invention.
FIG. 5 is a flowchart showing a process executed by each of the CPUs 3 (1) to 3 (n) in FIG. 4;
FIG. 6 is a diagram illustrating a storage area of the semiconductor memory of FIG. 4;
FIG. 7 is a block diagram showing a configuration of an editing system according to the present invention.
[Explanation of symbols]
Reference Signs List 1 semiconductor storage device, 2 (1) to 2 (n) input / output interface, 3 (1) to 3 (n), 4 CPU, 5 semiconductor memory, 11 (1) to 11 (3) editing terminal, 12 gateway terminal , 13 AV server, 18 Ethernet, 19 database

Claims (6)

Multiple input / output interfaces,
A semiconductor memory;
Memory control means for controlling the semiconductor memory;
The logical address is converted to a physical address of the semiconductor memory based on an access request specifying a logical address input to the input / output interface, and the converted physical address of the semiconductor memory is converted via the memory control means. Processing means for accessing an address area. The semiconductor memory device according to claim 1,
The processing means includes:
Processing for causing the memory control means to search for a free area of the semiconductor memory according to the data size based on a file storage request specifying a logical address corresponding to the data size being input to the input / output interface;
Based on the presence of the free space, via the input / output interface, a process of requesting the source of the storage request to transmit the data of the file,
The process of writing the data of the file received through the input / output interface to the empty area of the semiconductor memory by the memory control means, and the address of the empty area of the semiconductor memory in association with the file. A semiconductor memory device that executes a process of storing. The semiconductor memory device according to claim 1,
A semiconductor memory device comprising a plurality of said processing means, one for each of said input / output interfaces. Storage means for storing the material,
A semiconductor storage device;
Transfer means for transferring the material stored in the storage means to the semiconductor storage device;
Including a plurality of editing terminals for editing the material transferred to the semiconductor storage device,
The semiconductor storage device includes:
Multiple input / output interfaces,
A semiconductor memory;
Memory control means for controlling the semiconductor memory;
The logical address is converted to a physical address of the semiconductor memory based on an access request specifying a logical address input to the input / output interface, and the converted physical address of the semiconductor memory is converted via the memory control means. Processing means for accessing the address area,
The editing means is characterized in that the transfer means and each of the editing terminals are respectively connected to the separate input / output interfaces of the semiconductor memory device, and transmit an access request specifying a logical address to the semiconductor memory device. system. The editing system according to claim 4,
The processing means of the semiconductor storage device includes:
Processing for causing the memory control means to search for a free area of the semiconductor memory according to the data size based on a file storage request specifying a logical address corresponding to the data size being input to the input / output interface;
Based on the presence of the free space, via the input / output interface, a process of requesting the source of the storage request to transmit the data of the file,
The process of writing the data of the file received via the input / output interface to the empty area of the semiconductor memory by the memory control means, and the address of the empty area of the semiconductor memory in association with the file. Execute the process to memorize,
The transfer means, each of the editing terminals,
When requesting the semiconductor storage device to save a file, a logical address corresponding to a data size is designated. The editing system according to claim 4,
An editing system, wherein the semiconductor storage device has a plurality of the processing means in a one-to-one correspondence with each of the input / output interfaces.

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