JP2004013962A - Video recording/reproducing device and file system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video recording/reproducing device and a file system capable of increasing the processing efficiency of entire hardware by ensuring the performance of video input/output processing and sharing a plurality of hardware units. <P>SOLUTION: This video recording/reproducing device is provided with: a microprocessor 100; a bus interface control section 200 connected to the microprocessor 100; an address data bus ADB 1 connected to the bus interface control section 200; an ADB 2; a memory 310 connected to the address data bus ADB 1 and the ADB 2, a video audio decoder 330 or the like connected to the ADB 2 and the address data bus ADB 1; and drive interfaces 350, 351, and disk units 400, 401 connected to the drive interfaces 350, 351. From address spaces of the address data buses ADB 1, ADB 2, reading/writing is made possible in bus band management registers 202 and 203 in the bus interface control section 200 and disk band management registers 352 and 353 in the drive interfaces 350, 351. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video recording / reproducing apparatus and a file system, and more particularly to a video recording / reproducing apparatus and a file system that manage data arrangement and hardware resources such as a data transmission path.
[0002]
[Prior art]
In a conventional system, there is an apparatus that determines the data arrangement in consideration of the performance of a disk device and the bandwidth required by an application.
[0003]
However, since the hardware resources shared with other applications such as a bus have not been evaluated, as a result, it is assumed that the performance can be estimated and used in a one-channel video recording and playback environment. However, it has been difficult to guarantee the band in the recording and reproduction control of a plurality of channels.
[0004]
For example, Japanese Patent Application Laid-Open No. 2001-517824 discloses a file system for determining the length of a file to be continuously written from an input / output bandwidth request for disk access and the transfer performance of a disk drive. Had the problems described above.
[0005]
Further, in the conventional system, the load on the disk is determined based on the channel utilization rate or the like, and only a channel with a low load can be selected and recorded. Further, in applications requiring bandwidth guarantee such as video, it cannot be used in input / output control that also takes into account the input / output performance of the disk device.
[0006]
For example, in Japanese Patent Application Laid-Open No. Hei 8-212087, in order to check the utilization rate of a channel connected to an external storage device on page 30, line 30, a utilization rate request is made to a channel utilization rate monitor, and The usage rate is compared with the threshold value. If the usage rate is equal to or greater than the threshold value, the evacuation file creation unit describes the file management method for creating the evacuation file, that is, requesting generation of a duplicate file. The management method has the above-mentioned problems.
[0007]
[Problems to be solved by the invention]
The problem with the conventional method is that in the file system of the conventional computer system, the bandwidth guarantee is limited to recording and reproduction of one video stream. That is, when handling a plurality of files, the bandwidth cannot be guaranteed.
The reason is that hardware resources cannot be managed, and as a result, hardware resources that share a plurality of video recording / reproducing operations with the same disk or resources on the same bus are not managed.
[0008]
Therefore, the present invention provides a computer system or a video recording / reproducing apparatus that guarantees the performance of video input / output processing via a file system, and allows a plurality of hardware to be shared while the performance is guaranteed, thereby realizing hardware The purpose is to improve the processing efficiency of the entire ware.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, a video recording / reproducing apparatus includes a microprocessor on which software for performing file management operates, a bus interface controller connected to the microprocessor, and a plurality of bus interfaces connected to the bus interface controller. An address data bus, a memory connected to all of the plurality of address data buses, at least one selected from a tuner, a video / audio decoder, a network interface connected to the plurality of address data buses, and a plurality of address data buses. What is claimed is: 1. A video recording / reproducing apparatus having two or more drive interfaces connected to all of them, and a disk device connected to each of the drive interfaces, wherein a bus bandwidth control register is provided in a bus interface control unit, and a disk Dress It has a disk band management register, of two or more address address space of each data bus, and bus bandwidth management register, and a disk band management register, and is characterized in that it is readable and writable.
[0010]
According to the second aspect of the present invention, when recording and reproducing video and / or audio on a disk device, the video recording / reproducing apparatus uses a tuner, a video / audio decoder, or a network interface connected to a plurality of address data buses. In addition, a bus band is secured by rewriting a bus band management register in a bus interface control unit, and data in a memory is input / output.
[0011]
According to the third aspect of the present invention, the file system includes a microprocessor on which software for performing file management operates, a bus interface control unit connected to the microprocessor, and a plurality of address data connected to the bus interface control unit. A bus, a memory connected to all of the plurality of address data buses, at least one selected from a tuner, a video / audio decoder, and a network interface connected to the plurality of address data buses, and a connection to all of the plurality of address data buses In a video recording / reproducing apparatus having two or more drive interfaces and a disk device connected to each of the drive interfaces, a file system for managing an area of a disk operating on the microprocessor, comprising: When recording and playing back video and / or audio on the device, software that performs file management based on the video and / or audio bandwidth specified by the application that issues input / output instructions to the file system is stored in the memory. The band usage status is grasped by using the disk band management information stored in the storage device, and whether or not the recording operation or the reproduction operation is started is determined, and the band is guaranteed.
[0012]
According to the fourth aspect of the present invention, the file system includes a microprocessor on which software for performing file management operates, a bus interface control unit connected to the microprocessor, and a plurality of address data connected to the bus interface control unit. A bus, a memory connected to all of the plurality of address data buses, at least one selected from a tuner, a video / audio decoder, and a network interface connected to the plurality of address data buses, and a connection to all of the plurality of address data buses In a video / audio recording / reproducing apparatus having two or more drive interfaces and a disk device connected to each of the drive interfaces, a file system for managing an area of a disk operating on the microprocessor, When recording or reproducing video and / or audio on a disk device, a disk bandwidth management register of a drive interface is provided based on a video and / or audio bandwidth specified by an application which issues an input / output instruction to a file system. Is used to hold the bandwidth usage status of the disk device by rewriting the register, determine whether or not the recording operation or the playback operation is started based on the bandwidth usage status on the register, and perform the bandwidth guarantee. It is to be.
[0013]
According to the fifth aspect of the present invention, the file system is connected to one or more microprocessors on which software for performing file management operates, a bus interface control unit connected to the microprocessor, and the bus interface control unit. A plurality of address data buses, a memory connected to all of the plurality of address data buses, at least one selected from a tuner, a video / audio decoder, a network interface connected to the plurality of address data buses, and a plurality of address data. In a video recording / reproducing apparatus having two or more drive interfaces connected to all of the buses and a disk device connected to each of the drive interfaces, a file system for managing the area of a disk operating on the microprocessor Therefore, when recording and reproducing video and / or audio on the disk device, the band usage status of the disk device is held by rewriting the register using the disk band management register in the drive interface, Judge whether recording / reproducing operation is possible or not based on the bandwidth usage status, guarantee the bandwidth of the disk device, and rewrite the bus bandwidth management register in the bus interface control unit to manage the usage status of the address data bus bandwidth, Is selected.
[0014]
According to the invention described in claim 6, the file system uses the disk bandwidth management register in the drive interface to record the bandwidth usage status of the disk device when recording video and / or audio on the disk device. Based on the bandwidth usage status in the register, the disk device with the lighter disk load is selected, the file is written to the selected disk device, and the file management data and directory management data are stored in the file. It is characterized in that the recorded information is recorded on a disk device.
[0015]
According to the seventh aspect of the present invention, when executing the register access operation on the address data bus, the file system holds the register access operation in the bus band management register or the memory managed by the file system. The operation interval is changed according to the bus band management information, and control is performed so that the load on the address data bus is not excessive.
[0016]
According to the eighth aspect of the invention, the file system reduces the occupation time of the address data bus by changing the address data bus used regularly when recording or reproducing video and / or audio on the disk device. It is characterized in that it is kept below a predetermined upper limit.
[0017]
According to the ninth aspect of the present invention, when recording or reproducing video and / or audio on the disk device, the file system determines the occupation time of the disk device in advance by changing the disk device for recording periodically. Or less than the upper limit.
[0018]
According to the tenth aspect, the file system calculates a disk load based on a video rate and a bus occupation time required for disk input / output when recording video and / or audio on the disk device. By managing based on the bandwidth management register or the disk bandwidth management information held on the memory in the file system, data can be transferred to a plurality of disks in a fixed length so that the load on each disk is less than a predetermined upper limit. Is divided and recorded in a distributed manner.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a video recording / reproducing apparatus and a file system according to the present invention will be described in detail with reference to the accompanying drawings.
[0020]
FIG. 1 shows a hardware configuration of an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
[0021]
File system software that determines the arrangement of data to be recorded on the disk devices 400 and 401 operates on the microprocessor 100 and controls each hardware via the bus interface control unit 200.
[0022]
The bus interface control unit 200 is connected to two systems of address data buses ADB1 and ADB2.
The microprocessor 100 can access the address spaces of the two buses connected to the bus interface control unit 200 using the upper bits of the address bus and the like.
[0023]
Further, the bus interface control unit 200 holds bus band management registers 201 and 202 for controlling the respective bands of the connected two address data buses ADB1 and ADB2.
This register is mapped on the address space of the bus as a shared register accessible from devices on the respective buses of the address data buses ADB1 and ADB2.
[0024]
The bus band management registers 201 and 202 operate by holding a converted value based on a conversion formula described later in the register, and secure the band by subtracting the value from the register and release the band by adding the value to the value. Operation shall be performed.
[0025]
Hardware having a band control function based on the IEEE 1394 standard (IEEE Std 1394-1995) can be applied to the address data bus for performing band management.
[0026]
When a plurality of microprocessors are not used, the bus band management registers 201 and 202 may be held in a memory managed by file system software.
[0027]
The memory 310, the tuner 320, the audio / video decoder 330, and a part or all of the network interface 340 are connected to the address data buses ADB1 and ADB2.
[0028]
These devices are connected to both address data buses ADB1 and ADB2, and, like the bus interface control unit 200, specify the address space of each bus and enable access to registers.
In the case where these devices do not receive an instruction from control software such as a file system and actively execute the transfer while consuming the bandwidth on the bus, each of these devices directly transmits the bus bandwidth management registers 201 and 202. Can be rewritten to perform band management.
[0029]
The memory 310, the network device 340, and the like perform data input / output by sharing with a plurality of pieces of hardware, and therefore, like the bus interface control unit 200, have one bandwidth management register for managing the bandwidth of hardware resources. May be provided.
[0030]
The drive interfaces 350 and 351 are also connected to both the address data buses ADB1 and ADB2, and can access their respective address spaces.
The drive interfaces 350 and 351 are connected to the disk devices 400 and 401, respectively, and provide disk bandwidth management registers 352 and 353 for each disk device.
[0031]
The disk bandwidth management registers 352 and 353 are also registers accessible from the address data buses ADB1 and ADB2, and can be rewritten by a device such as the microprocessor 100.
Further, the band management method is implemented by holding a value obtained from a conversion formula described later on the register, similarly to the bus band management register.
[0032]
The program on the microprocessor 100 transmits a data input / output command to the drive interface 350 or 351 via the bus interface control unit 200 and the address data bus ADB1 or ADB2. Then, based on the command, the drive interface 350 or 351 executes input / output of data from an address on the disk requested by the disk device 400 or 401, and executes an address data bus such as the memory 310 or the video / audio decoder 330. Perform data transfer to and from the above devices.
[0033]
In this embodiment, the description is made on the assumption that there are two disk devices, two buses, and one microprocessor. However, in the case where there are three or more disk devices and buses and two or more microprocessors, Also, the present invention can be similarly applied.
[0034]
When there is only one microprocessor and there is no other device that requests disk area management and input / output control, the disk bandwidth management registers 352 and 353 are provided with a file system operating as software for performing file management. It is also possible to realize it by holding it on a memory managed by.
[0035]
Similarly, the bus band management registers 201 and 202 operate as software for file management when devices on the address data buses ADB1 and ADB2 actively secure the bus band and do not perform data input / output operations. It is also possible to realize it by holding it on a memory managed by a file system to be executed.
[0036]
Next, a data input / output management operation of the file system using the bus band management register will be described.
[0037]
FIG. 2 shows a flowchart of a data input / output operation performed by the file system in one embodiment of the video recording / reproducing apparatus and the file system according to the present invention. The series of processes here can be implemented from the application as an API such as opening, reading / writing, and closing a file. Here, a series of processes will be described.
[0038]
First, a band securing operation is performed (step S100).
If band securing (step S101) succeeds (Yes), actual input / output is executed.
In step S101, if the band securing fails (No), the process is terminated abnormally.
[0039]
The operations in steps S100 and S101 are desirably implemented at the time of a normal file open process, and a parameter for determining a required bandwidth such as a data rate required for the bandwidth securing operation is also specified as a parameter at this time.
The details of the band securing operation step S100 will be described later.
[0040]
In step S101, if the band is successfully secured (Yes), a read / write operation is executed (step S102).
The details of the read / write operation step S102 will be described later.
[0041]
Next, it is determined whether the read / write operation has succeeded (step S103).
If the processing has not been completed normally (No), a band release operation (step S106) is executed, and the processing ends.
If the operation has been completed normally (Yes), it is determined whether or not the input / output operation has ended (step S104).
[0042]
If the input / output operation has not been completed (No), step S102 and subsequent steps are continued.
If the input / output operation has ended (Yes), the file management data is updated, a band release operation is executed (step S105), and the process ends normally.
[0043]
Hereinafter, the details of the read / write operation (step S102) in FIG. 2 will be described with reference to FIG. FIG. 3 shows a flowchart of a read / write operation in an embodiment of the video recording / reproducing apparatus and the file system according to the present invention.
[0044]
First, it is determined whether the area pointed to by the management data of the current file is insufficient for the read / write operation (step S200).
[0045]
If there is no shortage of area (No), the input / output operation of the disk device is executed (step S201).
Next, it is determined whether the input / output operation has been successful (step S202).
[0046]
If the input / output operation is successful in step S202 (Yes), the last accessed area on the disk is stored in the memory as information on the input / output operation (step S203), and the operation ends (normal end). .
If the input / output operation is not successful (No), the process is terminated abnormally.
[0047]
If it is determined in step S200 that the area is insufficient (Yes), an operation to secure the disk area of the file system is performed (step S204).
[0048]
If the area reservation succeeds in step S205 (Yes), the information relating to the final area reservation is stored in the memory (step S206), and the processing from step S201 is continued.
If the area securing operation has failed in step S205 (No), the processing is terminated abnormally.
[0049]
Hereinafter, the details of the band securing operation (step S100) in FIG. 2 will be described using FIG. FIG. 4 shows a flowchart of a band securing operation in one embodiment of the video recording / reproducing apparatus and the file system according to the present invention.
A method for determining whether or not the performance required for input / output is possible from a disk device selected in advance is referred to as a bandwidth securing operation A here.
[0050]
As for the method of selecting a disk, a disk with a larger converted value of the disk bandwidth, that is, a disk with a light load on the disk is selected. Select disks ordered by round robin. At the time of the recording operation, a disk having many unused areas, which is determined from the free area management structure of the file system, is preferentially selected. At the same time, when a bandwidth request to the disk occurs, it is conceivable that bandwidth is assigned preferentially to the write operation. Here, regarding the selection of a disk, a case will be described in which a disk with a larger value of the disk bandwidth management register and a lighter load is selected.
[0051]
First, a disk bandwidth securing operation is performed based on the disk input / output performance (step S300). This is a value obtained by converting the band for the performance of the disk device calculated based on the following formula, and subtracting this value from the disk band management registers 352 and 353 on the drive interfaces 350 and 351 by the converted amount. It is performed by doing. In this example, the following conversion is performed with the full range set to 1.
(Band conversion value) = (I / O processing time per unit time) / (Processing time per unit time during peak operation)
[0052]
It is determined whether the above value can be secured from the disk bandwidth management register 352 or 353 (step S301). If the value cannot be secured (No), the bandwidth securing operation ends abnormally. If it can be secured (Yes), a bandwidth securing operation of the selected bus is performed (step S302). This operation is performed by subtracting the converted value of the required band from the bus band management register 201 or 202 in the bus interface control unit 200. Therefore, the selection of the bus is executed by selecting the one with the larger remaining value of the converted value of the bus band described later. The following equation is used for conversion of the band. In this example, the following conversion is performed with the full range as 1.
(Converted value) = (time required per unit time) / (processing time per unit time during peak operation)
[0053]
It is determined whether the above value can be secured from the bus bandwidth management register 201 or 202 (step S303). If the value cannot be secured (No), the already secured disk bandwidth is released (step S306), and the process ends abnormally. I do. The release operation is performed by adding the obtained converted value to the disk bandwidth management register 352 or 353. If it can be secured (Yes), the file management metadata is generated and updated (step S304), the latest disk read / write operation information is held (step S305), and the process ends normally.
[0054]
Next, an execution procedure such as register access that does not require bandwidth reservation will be described with reference to the flowchart in FIG. Even for register access that does not require bandwidth reservation, it is desirable to perform simplified bandwidth management and limit the use of hardware resources in order to use hardware resources such as buses. Therefore, here, a processing example will be described as the band securing operation B.
[0055]
When accessing a register on the bus, since it is usually estimated by using the bus for a fixed time, a fixed value is secured using the conversion formula for the bus bandwidth management register described above, and the value is stored in the bus bandwidth management register. Is set in the bus bandwidth management register B203 independent of the above.
[0056]
The bandwidth securing operation is performed by subtracting the value from the bus bandwidth management register B203 to perform the bandwidth securing operation (step S400), and determines whether the bandwidth securing is successful (step S401).
If the band has been successfully secured (Yes), an actual register access is executed after applying a weight of a constant interval A (step S402).
If the bandwidth reservation fails (No), a wait at a constant interval B is inserted (step S403), and a retry is executed from step S400.
[0057]
In addition, the bus bandwidth management register B203 repeatedly sets a bandwidth value permitted at a certain interval by hardware or software, thereby suppressing a bus load accompanying a register access that does not require bandwidth management at a certain time interval to a certain rate or less. be able to.
[0058]
Here, the fixed intervals A and B are provided in order to suppress the bus access frequency, and are set in advance so as not to access the band of the entire bus at a certain frequency or more. For example, it is conceivable to set the bus usage rate not to exceed 20%. Instead of inserting a wait, it is also possible to queue an I / O request and use a bus function such as IEEE 1394.
[0059]
In addition, when such control is applied, it is necessary to perform the control in which the priority of the band securing operation A with the band control is made higher and the priority of the band securing operation B is made lower. Can be regarded as control involving. However, it is also possible to perform the band securing operation in consideration of three or more levels of priority, and the higher priority band securing operation requests the lower priority band securing operation to release the band, It is also possible to implement control to acquire the bandwidth in a targeted manner.
[0060]
Hereinafter, a method for managing file management data and directory management data in an embodiment of a video recording / reproducing apparatus and a file system according to the present invention will be described with reference to FIGS.
[0061]
Data input / output is executed based on the input / output processing procedure including the above-mentioned bandwidth management. However, it is necessary to write a management data structure on a disk as metadata for performing area management in file units as a file system. Therefore, first, a method of writing a management data structure in the case where the file system performs a selection operation of the disk devices 400 and 401 while performing band management will be described.
[0062]
When the file system writes the directory structure shown in FIG. 6, it is necessary to select one of the disk devices 400 and 401 for a disk capable of securing the bandwidth when securing the disk bandwidth in the bandwidth management control. In order for the file system to select this selection operation according to the operation status, it is necessary to write management data to a plurality of disk devices while logically maintaining such a structure.
[0063]
In this embodiment, this is realized by writing management data as metadata to each disk device. Here, the directory structure shown in FIGS. 7 and 8 is written to each of the disk devices 400 and 401, and these are superimposed and presented, thereby realizing the directory structure shown in FIG.
[0064]
At this time, the data structure recorded on each of the disk devices 400 and 401 holds file management data or directory management data as shown in FIG. 9 for each file, and these metadata are shown in FIGS. 10 and 11. The above-described directory structure is formed by recording on the disk as described above.
[0065]
Here, it is assumed that the directory management data is recorded even if the file is not stored on one disk device.
[0066]
In this example, the management data is written as shown in FIG. 10 to give the directory structure of the disk device 400 as shown in FIG. 10. At this time, files are stored in the area indicated by the directory 2 management data on the disk device 400. Although not present, this directory management data structure shall be written to both disk drives.
[0067]
The directory management data is always kept in the same state on multiple disks, so that file management data is always written when the file is handled by an absolute path name including the directory name used for file identification in file handling. Is performed to hold the nodes that can be used.
[0068]
The file management data and the directory management data are used to generate file management data at the end of the above-mentioned band securing operation, and are recorded on a disk. Before the band release operation, recording on the disk is performed as a final result of writing to the disk.
[0069]
Hereinafter, other embodiments of the video recording / reproducing apparatus and the file system according to the present invention will be described.
[0070]
The hardware configuration is the same as that shown in FIG. 1, but the control method of the file system software operating on the microprocessor 100 is different from that of the above-described embodiment. Also, in the present embodiment, the description will be made assuming that there are two disk devices, two buses, and one microprocessor, but there are three or more disk devices and buses and two or more microprocessors. In such cases, the present invention can be similarly applied.
[0071]
In the control of the microprocessor, when the data input / output operation needs to input / output a large amount of data, the disk device control can handle only one data stream at a time. If so, other input / output requests may be delayed during that time.
Therefore, the input / output request of the disk device is divided into data of a fixed length according to the requested bandwidth and recorded on the disk, thereby continuously reducing the degree of occupation of hardware and improving the performance of the entire system. To improve
[0072]
FIG. 12 shows a division order when data is divided and recorded on the disk devices 400 and 401, and recording is sequentially performed from the area 0 to the area 1 and the area 2. Here, it is assumed that the division size of each area is assigned with a fixed length based on the required bandwidth of the recording data, the required bandwidth of the entire system, and the response time of the input / output operation.
[0073]
The length of the division is set so that a plurality of input / output requests to be processed simultaneously can all be processed within the input / output response time required by the system. That is, although the input / output processing time of the disk device usually depends on the performance of the disk device, it can be schematically represented as shown in FIG.
(I / O processing time) = (Access time) + (I / O data length) / (Data read speed)
[0074]
Therefore, the overhead is fixedly generated as overhead with the access, and the performance is relatively improved by increasing the input / output data length.
[0075]
However, considering that the input / output processing time is prolonged and other input / output processing cannot be performed, the system as a whole has poor response.
[0076]
To avoid this, based on the data rate requested by the data, each I / O request of about the amount of I / O data to be read within the response time is performed so that all services are completed within a certain response time. If it is suppressed, it can be seen that the disk is not inadvertently occupied.
[0077]
In the case where the timing of the application operation is not actually managed, the worst case is estimated to be a case where other input / output requests accumulate twice in the worst case. For this reason, the input / output data amount is determined based on half the time with respect to a certain response time as a required specification, and the data is divided and arranged based on the input / output data amount.
[0078]
The processing time obtained as a result can be obtained by the following equation. Here, Σ represents the sum of the processing times for all the relevant video streams for which band control is performed, where the input / output data length is the amount of data required for half the response time. .
(Disk processing time) = {(access time) + (input / output data length) / (data read speed)}
[0079]
If the processing time is set to be equal to or less than 応 答 response time at the time of actual band allocation, the input / output request is not permitted for the input / output request.
[0080]
When this control is implemented by the above-described hardware configuration, the disk processing time is accumulated in the disk bandwidth management register 352 or 353 so that the time becomes equal to or less than a preset 1/2 response time. By performing the control, the present invention can be similarly applied to a case where a plurality of multiprocessors are configured.
[0081]
As the structure of the file management data to be written in this way, the file management data shown in FIG. 14 is used.
[0082]
Next, in this embodiment, a processing procedure for securing a disk band will be described with reference to the flowchart of FIG.
In the data division arrangement as in this embodiment, since it is necessary that each of the two disks can guarantee the disk bandwidth, the bandwidth securing operation C is performed in the following procedure.
[0083]
First, a band securing operation of the disk devices 400 and 401 is performed (step S500). If it is determined in step S501 that the bandwidth has failed (No), a bandwidth release operation (step S504) is performed, and the process ends.
If the band securing (step S501) succeeds (Yes), the band securing operation of the address data buses ADB1 and ADB2 used for data transfer is performed (S502). Which bus is used is not particularly limited, but may be selected so that the load is distributed so that a margin is finally left in the bus band.
[0084]
Next, it is determined whether or not the bandwidth of the address data bus has been successfully secured (step S503). If the band securing has not been successful (No), a band releasing operation (step S504) is executed, and the process ends.
If the band securing succeeds (Yes), the band securing operation ends.
[0085]
Basically, the same file management data is written in the disk devices 400 and 401. However, for a file recorded by being divided into two disks, the file is split according to the file attribute of the file management data written on each disk. , The split order information indicating the split order, and the length of the split data are written in the split size.
The file system refers to these, recognizes that the data is divided, determines the order of the input / output operations, and then executes the input / output operations.
[0086]
As an operation (operation) of the above-described embodiment, since it is possible to receive a request for a necessary bandwidth and a response time associated with input / output of video from an application, a file system is provided for each input / output of each file. It is possible to control hardware after grasping the processing performance to be performed. In addition, resource management based on the data transmission path on the hardware and the bandwidth of the disk device and bus interface managed by the file system is possible, so performance is guaranteed even when the file system controls multiple I / Os. As a result, hardware resources can be distributed.
[0087]
【The invention's effect】
According to the video recording / reproducing apparatus and the file system of the present invention, it is possible to obtain information such as input / output performance required for data to be input / output from an application, and to monitor the use state of hardware resources. Therefore, a required bandwidth can be guaranteed for each input / output request. Therefore, it is possible to guarantee performance when performing real-time processing such as video recording / reproducing operation.
[0088]
Further, according to the video recording / reproducing apparatus and the file system according to the present invention, since the file system can manage the hardware resources, the operation status of the hardware and the performance required by the application are both grasped, and the hardware is controlled according to the load state. The file system can manage the efficient data transmission path assignment. As a result, the utilization efficiency of hardware can be improved to the maximum while the performance is guaranteed, so that when processing a plurality of video streams, the processing efficiency of hardware can be increased.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 2 is a flowchart of a data input / output operation in an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 3 is a flowchart of a read / write operation in an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 4 is a flowchart of a band securing operation A in one embodiment of the video recording / reproducing device and the file system according to the present invention.
FIG. 5 is a flowchart of a band securing operation B in one embodiment of the video recording / reproducing device and the file system according to the present invention.
FIG. 6 is a directory structure diagram for explaining an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 7 is a directory structure diagram for explaining an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 8 is a directory structure diagram for explaining an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 9 is a management data structure diagram for explaining an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 10 is a directory hierarchy diagram for explaining an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 11 is a directory hierarchy diagram for explaining an embodiment of a video recording / reproducing apparatus and a file system according to the present invention.
FIG. 12 is an explanatory diagram of another embodiment of a video recording / reproducing device and a file system according to the present invention.
FIG. 13 is an explanatory diagram of another embodiment of the video recording / reproducing device and the file system according to the present invention.
FIG. 14 is a management data structure diagram for explaining another embodiment of the video recording / reproducing device and the file system according to the present invention.
FIG. 15 is a flowchart of a band securing operation C for explaining another embodiment of the video recording / reproducing apparatus and the file system according to the present invention.
[Explanation of symbols]
100 microprocessor
200 Bus interface control unit
201, 202 Bus bandwidth management register
203 Bus bandwidth management register B
310 memory
320 tuner
330 Video / Audio Decoder
340 network interface
350 drive interface
351 drive interface
352, 353 Disk bandwidth management register
400 disk unit
401 disk unit
ADB1, ADB2 Address data bus

Claims (10)

A microprocessor on which software for file management operates;
A bus interface control unit connected to the microprocessor;
A plurality of address data buses connected to the bus interface control unit;
A memory connected to all of the plurality of address data buses;
A tuner connected to the plurality of address data buses, a video / audio decoder, at least one selected from a network interface;
Two or more drive interfaces connected to all of the plurality of address data buses;
A video recording / reproducing device having a disk device connected to each of the drive interfaces, wherein the video recording / reproducing device includes:
A bus bandwidth management register in the bus interface control unit;
The drive interface further includes a disk bandwidth management register of the disk device,
A video recording / reproducing apparatus which can read and write the bus band management register and the disk band management register from an address space for each of two or more address data buses. When recording and reproducing video and / or audio on the disk device, a tuner, a video / audio decoder, or a network interface connected to the multiple address data bus rewrites the bus band management register in the bus interface control unit. By securing bus bandwidth,
2. The video recording / reproducing apparatus according to claim 1, wherein the data on the memory is input / output. A microprocessor on which software for file management operates;
A bus interface control unit connected to the microprocessor;
A plurality of address data buses connected to the bus interface control unit;
A memory connected to all of the plurality of address data buses;
A tuner connected to the multiple address data bus, a video / audio decoder, at least one selected from a network interface;
Two or more drive interfaces connected to all of the plurality of address data buses;
In a video recording / reproducing device having a disk device connected to each of the drive interfaces, a file system for managing an area of a disk operating on the microprocessor,
When recording and reproducing video and / or audio on the disk device, the file management is performed based on the video and / or audio bandwidth specified by an application that issues an input / output instruction to the file system. A file system, wherein software uses the disk bandwidth management information stored in the memory to grasp the bandwidth usage status, determine whether or not a recording operation or a reproduction operation is started, and guarantee the bandwidth. A microprocessor on which software for file management operates;
A bus interface control unit connected to the microprocessor;
A plurality of address data buses connected to the bus interface control unit;
A memory connected to all of the plurality of address data buses;
A tuner connected to the multiple address data bus, a video / audio decoder, at least one selected from a network interface;
Two or more drive interfaces connected to all of the plurality of address data buses;
In a video recording / reproducing device having a disk device connected to each of the drive interfaces, a file system for managing an area of a disk operating on the microprocessor,
When recording or reproducing video and / or audio on the disk device, the drive interface of the drive interface is controlled based on the video and / or audio bandwidth specified by an application that issues an input / output instruction to the file system. Using the disk bandwidth management register,
A file system, wherein the band use status of the disk device is retained by rewriting a register, and based on the band use status on the register, whether or not the recording operation or the reproduction operation is started is determined to perform band guarantee. . One or more microprocessors running software for file management,
A bus interface control unit connected to the microprocessor;
A plurality of address data buses connected to the bus interface control unit;
A memory connected to all of the plurality of address data buses;
A tuner connected to the multiple address data bus, a video / audio decoder, at least one selected from a network interface;
Two or more drive interfaces connected to all of the plurality of address data buses;
In a video recording / reproducing device having a disk device connected to each of the drive interfaces, a file system for managing an area of a disk operating on the microprocessor,
When recording or reproducing video and / or audio on the disk device, using a disk band management register in the drive interface, holding the band usage status of the disk device by rewriting the register,
Determine whether recording / reproducing operation is possible based on the band usage status on the register, and guarantee the band of the disk device,
By rewriting the bus band management register in the bus interface control unit, to manage the use status of the band of the address data bus,
A file system, wherein the address data bus with a lighter load is selected. When recording video and / or audio on the disk device, using the disk band management register in the drive interface, holding the band usage status of the disk device by rewriting the register,
Based on the bandwidth usage on the register, select the disk device with a light disk load,
While writing a file to the selected disk device,
6. The file system according to claim 3, wherein the file management data and the directory management data are recorded on the disk device on which the file is recorded. When executing the register access operation on the address data bus, the register access operation is performed by changing an operation interval according to the bus band management information held in the bus band management register or the memory managed by the file system. Let
6. The file system according to claim 3, wherein control is performed so that a load on the address data bus is not excessive. When recording or reproducing video and / or audio on the disk device, the occupation time of the address data bus is suppressed to a predetermined upper limit or less by changing the address data bus used periodically. 5. The file system according to claim 3, wherein: When recording and reproducing video and / or audio on the disk device, the occupation time of the disk device is suppressed to a predetermined upper limit or less by changing the disk device for periodically recording. The file system according to any one of claims 3 to 5. When recording video and / or audio on the disk device, calculate a disk load based on a video rate and a bus occupation time required for disk input / output,
By managing based on the disk bandwidth management register or the disk bandwidth management information held on the memory in the file system, a plurality of disks can have a certain length so that the load for each disk is equal to or less than a predetermined upper limit. The file system according to any one of claims 3 to 5, wherein the data is divided and recorded in a distributed manner.

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