JP2001005701A - Rewrite type information recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recording state wherein data access delay in reproduction can efficiently be suppressed without requiring a long time for defragmentation even when different files are repeatedly deleted and recorded on a recording medium. SOLUTION: When successive data are divided and recorded in plural section areas of the storage area of the recording medium 12, division section information showing the respective section areas is stored in a division section information storage part 8 of a RAM 7 and when successive data are reproduced, a controller 2 stores the access frequencies of the respective section areas corresponding to the division section information, selects division section area information of high access frequencies from the division section information stored in the division section information storage part 8, and rerecords the data recorded in the section areas indicated by the division section information to successive section areas respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a CD-RW, DV
By storing continuous data in a rewritable recording medium such as a D-RAM in units of a specified storage capacity, information can be randomly recorded and reproduced.
The present invention relates to a rewritable information recording / reproducing device such as a D-RW drive and a DVD drive.

[0002]

2. Description of the Related Art Generally, a CD capable of recording information at a random position on a rewritable recording medium such as a CD-RW or a DVD-RAM and reproducing the recorded information.
In a rewritable information recording / reproducing apparatus such as an RW drive and a DVD drive, in order to store logically continuous data such as a file, the data is divided into a plurality of pieces of data in a predetermined divisional unit. It is stored in the recording area.

[0003] Each divided area stores data of a prescribed data capacity, and even if the data amount of a file is smaller than that, the divided area is not used for storing other file data.

FIG. 11 is a schematic diagram of a data recording state in a storage area of a recording medium. For example, FIG.
In the storage area, in the file A which is continuous data, a divided section area (indicated simply as “section” 1) in the drawing, 1
Since the file B has the divided area 2 and the file C has the data amount of one section or more, the divided areas 3 and 4 are allocated. As described above, in order to store the data of the file in the storage area of the recording medium, a divided section area corresponding to each data amount is taken.

[0005] As shown in FIG.
B, C, D, and E are stored, and the divided area 6 is assumed to be in an empty state. Information on which divided area the data of each file is formed by the data recorded is shown in the figure. Are stored in the divided section management area in the recording medium from which is omitted. Here, when the file B is deleted, the divided section area 2 in which the data of the file B is stored becomes empty.

Next, when a file F having a data amount exceeding one section is recorded, it is divided and stored in divided section areas 2 and 6 as shown in FIG. As described above, when the operation of recording and erasing the continuous data is repeated, the continuous data may be divided into a plurality of non-adjacent divided sections.

[0007] Therefore, during reproduction of continuous data, access to the data is divided, and it takes time to retrieve the continuous data. This division state of continuous data is called "fragmentation".

Conventionally, when a storage area of a recording medium is in a fragmentation state, a process of vacating empty space as needed and re-recording so that a file becomes continuous data is performed. Was. This is called "defragmentation".

However, this defragmentation method has a problem that it takes a great deal of time to perform re-recording on the entire area of the recording medium by reading and writing. In particular, with the increase in storage capacity of today's recording media, the problem has become more prominent.

[0010] In order to solve such a problem, in the technique described in Japanese Patent Application Laid-Open No. 9-319627, defragmentation is executed at the timing of deleting a file from a recording medium in a fragmentation state.

[0011]

However, the technique described in Japanese Patent Application Laid-Open No. 9-319627 is an effective technique only when deletion and recording are repeatedly performed on a storage area with the same file name. In addition, in defragmentation, all the data after the deleted data is moved all at once at the same time, so that there is also a problem that it takes a long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. Even if deletion and recording of different files are repeatedly performed on a recording medium, data access during reproduction can be performed without taking time for defragmentation. An object of the present invention is to provide a recording state in which a delay can be efficiently suppressed.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention divides a storage area of a rewritable recording medium into a plurality of divided areas having a prescribed size, and stores continuous data in units of the divided areas. In a rewritable information recording / reproducing apparatus that records and reproduces data at random positions with respect to the storage area by dividing and storing data, continuous data is divided over a plurality of partitioned areas that are not adjacent to the storage area. When divided data is recorded, the divided data indicating the divided area in which the divided data is recorded is stored. When the continuous data is reproduced, the access frequency to each divided area is divided by the divided data. Access frequency storage means for storing corresponding to the section information;
From among the divided section information stored in the divided section information storage means, the divided section information having a high access frequency is selected, and the data recorded in each of the divided areas indicated by the divided section information is recorded in the continuous divided areas. This is provided with defragmentation control means for performing re-execution.

Further, the storage area of the rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas, so that a random position with respect to the storage area is obtained. In a rewritable information recording / reproducing apparatus which records and reproduces data in a storage area, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Divided partition information storage means for storing divided partition information indicating the divided partition areas, and access frequency storage means for storing the access frequency to each partitioned area in association with the divided partition information when reproducing the continuous data; Each time the continuous data is reproduced, a value equal to or greater than a preset reference value from among the divided section information stored in the divided section information storage means is used. Select split partition information access frequency, it may be provided defragmentation control means to re-record each divided area for continuous data recorded in the partition area indicated by the division block information.

Further, the storage area of the rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas, so that a random position with respect to the storage area is obtained. In a rewritable information recording / reproducing apparatus which records and reproduces data in a storage area, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Divided section information storage means for storing divided section information indicating the divided area, and a division number indicating the number of divided areas recorded by dividing the continuous data in correspondence with the divided section information stored by the means. Means for storing the number of divisions to be stored, and, when reproducing the continuous data, storing the frequency of access to each divided area in association with the divided division information. Access frequency storage means, and divided partition information having a high access frequency and a large number of divisions are selected from the divided partition information stored in the divided partition information storage means, and are recorded in each partitioned area indicated by the divided partition information. It is preferable to provide a defragmentation control unit that rewrites the recorded data in the continuous divided areas.

Further, the storage area of the rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas, so that a random position with respect to the storage area is obtained. In a rewritable information recording / reproducing apparatus which records and reproduces data in a storage area, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Divided section information storage means for storing divided section information indicating the divided section areas, and a divided distance indicating the distance between the divided areas recorded by dividing the continuous data in accordance with the divided section information stored by the means. And a division distance storing means for storing the frequency of access to each of the divided areas in association with the divided section information when the continuous data is reproduced. Access frequency storage means, and division section information having a high access frequency and a long division distance are selected from the division section information stored in the division section information storage section, and divided section information indicated by the division section information is selected. It is preferable to provide a defragmentation control unit for re-recording the recorded data in each of the continuous divided areas.

Further, in the rewritable information recording / reproducing apparatus as described above, when the defragmentation control means re-records the data in a continuous partitioned area,
It is preferable to provide means for selecting a continuous partitioned area closest to the required number of partitioned areas from among the continuously recordable partitioned areas in the storage area.

Further, in the rewritable information recording / reproducing apparatus as described above, when continuous data is divided and recorded over a plurality of non-adjacent divided areas based on the empty state of the storage area, the divided data is recorded. It is preferable to provide a recording control unit for recording the divided section information indicating the divided area in which the data is recorded in the divided section information storage unit.

[0019]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a rewritable information recording / reproducing apparatus according to an embodiment of the present invention.

This rewritable information recording / reproducing apparatus is a CD-ROM.
The host interface 1 is a device such as an RW drive or a DVD-RAM drive, and receives data from an external host computer (not shown) or transmits data to the host computer.

The controller 2 is realized by a CPU, loads various operation procedures (including ordinary control procedures not shown) stored in the ROM 3 and executes the loaded procedures to thereby enable rewritable recording. The storage area of the medium is divided into a plurality of defined areas of a prescribed size, and continuous data is divided and stored in units of the defined areas, thereby realizing data recording and reproduction at random positions with respect to the storage area. Is controlled. Also, a reproduction control process, a defragmentation process,
Data control processing such as recording control processing is also performed.

The ROM 3 stores programs of a recording control procedure (program) 4, a reproduction control procedure (program) 5, and a defragmentation control procedure (program) 6, which are loaded into the controller 2 and executed. Thus, the functions of the recording control means (division section information storage means, division number storage means, division distance storage means), access frequency storage means, and defragmentation control means are realized.

The RAM 7 has a divided section information storage section 8 for recording divided section information and a work area section 9 necessary for the operation of the controller 2. Host interface 1,
The controller 2, the ROM 3, the RAM 7, and the recording / reproducing engine interface 10 are connected by an internal bus 13, respectively.

The recording / reproduction engine interface 10
A recording / reproducing engine 1 using various control means and storage means realized by a controller 2 by a program in a ROM 3.
1 is responsible for control and data input / output. The recording / reproducing engine 11 records data on a recording medium 12 such as a CD-RW or a DVD-RAM or reproduces data from the recording medium 12 according to a control signal sent from the controller 2 through the recording / reproducing engine interface 10.

FIG. 2 is a diagram schematically showing information stored in a table format in the divided section information storage section 8 of the RAM 7. As a format according to the first and second aspects of the present invention, as shown in (a) of the figure, continuous data is divided and stored as a partition number string in a partition number sequence. The table may be made up of a “divided area” item and an “access frequency” item that has the number of times the divided area has been reproduced after recording as a numerical value as the access frequency.

As a format according to a third aspect of the present invention, as shown in FIG. 2B, a continuous number is a partition number string indicating a partition area where the continuous data is divided and stored. , An "access frequency" item that records the number of times each segment area has been reproduced after recording as an access frequency, and a "division number" item that records the numerical value of each segment area And a table consisting of

Further, as a format according to a fourth aspect of the present invention, as shown in (c) of the figure, a continuous data is a partition number string indicating a partition area where the continuous data is divided and stored. Is recorded, the number of times each of the divided areas is reproduced after recording is recorded as an access frequency, and the numerical value of the sum of the divided distances between the divided areas is recorded. It is good to make a table including "division distance" items.

Next, the rewritable recording medium 1 shown in FIG.
In the rewritable information recording / reproducing apparatus for recording / reproducing the data in / from the recording / reproducing apparatus 2, the operation processing according to the claims of the present invention when the recording and the reproduction of the continuous data are repeatedly performed in the unit of a predetermined divided area will be described with reference to FIGS. This will be described in detail.

(1) Processing characteristic of the rewritable information recording / reproducing apparatus according to claim 1 of the present invention in the rewritable information recording / reproducing apparatus shown in FIG.

In this rewritable information recording / reproducing apparatus, the controller 2, the reproduction control procedure program 5, the divided section information storage section 8, and the like, divide and record continuous data over a plurality of section areas that are not adjacent to the storage area. When the division is performed, the function of the division section information storage means for storing the division section information indicating the division area in which the divided data is recorded is performed.

An access frequency storage means for storing the access frequency to each partition area in association with the partition information when the continuous data is reproduced, by the controller 2, the reproduction control procedure program 5, and the division section information storage section 8; Perform the function of

Further, the controller 2, the defragmentation control procedure program 6, and the like select the divided section information having a high access frequency from the divided section information stored in the divided section information storage means, and are indicated by the divided section information. It functions as a defragmentation control unit that rewrites the data recorded in each of the divided areas into continuous divided areas.

FIG. 3 is a flowchart showing a reproduction control process when reproducing continuous data recorded on the recording medium 12. FIG. 4 is a flowchart showing a defragmentation control process for performing continuous partitioning when the frequency of access to a divided area in a divided state already recorded on the recording medium 12 is high. Note that “S” in the figure indicates a step.

As shown in FIG. 3, in this reproduction control processing, it is first determined whether or not continuous data to be reproduced is stored in a plurality of non-adjacent divided areas (divided divided areas) in the recording medium. Check (S11). If it is stored in a plurality of partition areas, it is checked whether or not it is registered in the table of the partition information storage unit (S12). (S13).

Thereafter, the value of the access frequency corresponding to the divided section area in the divided section information storage section is incremented by "1" (S14), and the operation is performed through the recording / reproducing engine interface so that the recording / reproducing engine performs the reproducing operation (S14). S15). Then, the reproduction data is transferred to the host computer through the host interface (S16), and the process is terminated.

If the reproduction area is not stored in a plurality of non-adjacent divided areas in the above-described processing of S11,
The processing of S15 and S16 is executed as a normal reproduction operation, and the processing ends.

Further, if the registration has been made in the above-described processing of S12, the value of the access frequency corresponding to the divided area in the divided area information storage unit is incremented by "1" (S1).
4) An operation is performed through the recording / reproducing engine interface so that the recording / reproducing engine performs a reproducing operation (S1).
5). Then, the reproduction data is transferred to the host computer through the host interface (S1).
6), this process ends.

Note that the processing of S15 and S16 is performed by the unique reproduction / reproduction in the rewritable information recording / reproducing apparatus to which the present invention is applied.
And the data transfer operation. In particular, the order of the processes in S11 to S14 may be changed.

As shown in FIG. 4, in this defragmentation control process, first, a partition area (divided partition area) having a high access frequency is selected from the divided partition information recording unit (S2).
1). At this time, for example, the divided area having the highest access frequency may be selected, or a reference value of the access frequency may be defined, and all the divided areas exceeding the reference value may be selected.

Next, it is checked whether or not there is a continuous free area of the number of the selected partitions in the storage medium in the storage medium (S22). If there is no free area, the process ends. If there is a continuous free area, the data of each partitioned area of the continuous data is re-recorded there (S23). Then, the original partitioned area is set as an empty partitioned area, information on the defragmented divided partitioned area is deleted from the divided partitioned information storage unit (S24), and the process is terminated.

This defragmentation control processing is performed as follows.
Performs defragmentation without taking a large amount of time at a time by receiving a request from the host computer or periodically, and giving priority to the sections divided according to the access frequency to be reproduced. Therefore, it is possible to realize a state of the recording medium in which data can be sequentially and efficiently accessed.

As described above, in the rewritable information recording / reproducing apparatus according to this embodiment, in the processing according to the first aspect of the present invention, the access frequency of the divided section is measured by reproduction, and the division frequency of the divided section having a high access frequency is correspondingly measured. It is possible to realize a state of the recording medium in which the partition preferentially executes the defragmentation and enables efficient data access without taking much time in executing the defragmentation once.

(2) Processing characteristic of the rewritable information recording / reproducing apparatus according to claim 2 in the rewritable information recording / reproducing apparatus shown in FIG.

In this rewritable information recording / reproducing apparatus, the controller 2, the reproduction control procedure program 5, the divided section information storage section 8, and the like, divide and record continuous data over a plurality of section areas that are not adjacent to the storage area. When the division is performed, the function of the division section information storage means for storing the division section information indicating the division area in which the divided data is recorded is performed.

The controller 2, the reproduction control procedure program 5, and the division section information storage section 8 and the like, when reproducing continuous data, access frequency storage means for storing the access frequency to each division area in association with the division section information. Perform the function of

Further, the controller 2, the defragmentation control procedure program 6, etc., each time continuous data is reproduced, is equal to or greater than a preset reference value from among the divided section information stored in the divided section information storage means. It functions as defragmentation control means for selecting divided section information of the access frequency and re-recording data recorded in each section area indicated by the divided section information in continuous section areas.

The reproduction control processing is the same as the processing shown in FIG. FIG. 5 shows the recording medium 12.
9 is a flowchart showing a defragmentation control process for continuously segmenting when the access frequency of the divided segment area in the divided state already recorded is equal to or higher than the reference value. Note that “S” in the figure indicates a step.

As shown in FIG. 5, in this defragmentation control processing, first, for the divided area reproduced by the reproduction control processing, whether the access frequency from the divided division information recording unit is equal to or higher than a predetermined reference value is determined. A check is made (S31). If it is not equal to or greater than the reference value, the process is terminated. If it is equal to or greater than the reference value, it is checked whether or not the storage medium has a continuous free area equal to the number of reproduced sections (S
32).

If there is no free area, the process is terminated. If there is a continuous free area, the data of each section area of the continuous data is re-recorded there (S33). Then, the original partitioned area is set as an empty partitioned area, information on the defragmented divided partitioned area is deleted from the divided partitioned information storage unit (S34), and this process ends.

In the above processing, the defragmentation control is performed after the reproduction control processing. However, the defragmentation control may be performed after the reproduction control.
As described above, by executing the defragmentation control each time the reproduction control is executed, the fragmentation state of the continuous data is checked each time the reproduction is performed, and the state of the recording medium that can access data more efficiently can be realized. .

As described above, in the processing according to the second aspect of the present invention in the rewritable information recording / reproducing apparatus of this embodiment, by executing the defragmentation control after the execution of the reproduction control, the continuous data of each data is reproduced. Since the fragmentation state is checked and defragmentation is performed at a necessary timing, the state of the recording medium that enables more efficient data access as the reproduction is repeated can be realized.

(3) Processing characteristic of the rewritable information recording / reproducing apparatus according to claim 3 of the present invention in the rewritable information recording / reproducing apparatus shown in FIG.

In this rewritable information recording / reproducing apparatus, the controller 2, the reproduction control procedure program 5, the divided section information storage section 8, and the like, divide and record continuous data over a plurality of section areas which are not adjacent to the storage area. When the data is divided, the divided data indicating the divided area in which the divided data is recorded is stored, and the continuous data is divided and recorded in correspondence with the stored divided data. It functions as a division number storage unit for storing the number of divisions indicating the number of divided areas thus set.

The controller 2, the reproduction control procedure program 5, and the division section information storage section 8 and the like, when reproducing continuous data, access frequency storage means for storing the access frequency to each division area in association with the division section information. Perform the function of

Further, the controller 2, the defragmentation control procedure program 6, etc., select the divided section information having a high access frequency and a large number of divisions from among the divided section information stored in the divided section information storage means. It functions as a defragmentation control unit that rewrites data recorded in each of the divided areas indicated by the divided section information into continuous divided areas.

FIG. 6 is a flowchart showing a reproduction control process including a division number registration when reproducing continuous data recorded on the recording medium 12. FIG. 7 is a flowchart showing a defragmentation control process of continuously dividing the divided partitioned area in the divided state recorded in the recording medium 12 when the access frequency is high and the number of divisions is large. Note that “S” in the figure indicates a step.

As shown in FIG. 6, in this reproduction control processing, first, it is determined whether or not continuous data to be reproduced is stored in a plurality of non-adjacent divided areas (divided divided areas) in the recording medium. Check (S41).

If it is stored in a plurality of partition areas, it is checked whether or not it is registered in the table of the partition information storage unit (S42). It is registered in the section area item, and the number of divisions indicating the total number of section areas is stored in the division number item in association with the divided section area item (S43).

Thereafter, the value of the access frequency corresponding to the divided section area in the divided section information storage section is incremented by "1" (S44), and the operation is performed through the recording / reproducing engine interface so that the recording / reproducing engine performs the reproducing operation (S44). S45). Then, the reproduction data is transferred to the host computer through the host interface (S46), and the process ends.

If the reproduction area is not stored in a plurality of non-adjacent divided areas in the process of S41 described above,
The processing of S45 and S46 is executed as a normal reproduction operation, and the processing ends.

Further, if the registration has been made in the process of S42, the value of the access frequency corresponding to the divided area in the divided area information storage unit is incremented by "1" (S4).
4) An operation is performed through the recording / reproducing engine interface so that the recording / reproducing engine performs a reproducing operation (S4).
5). Then, the reproduction data is transferred to the host computer through the host interface (S4).
6), this process ends.

Note that the processing of S45 and S46 is performed by the unique reproduction / reproduction in the rewritable information recording / reproduction apparatus to which the present invention is applied.
And the data transfer operation. In particular, the order of the processes in S41 to S44 may be changed.

As shown in FIG. 7, in this defragmentation control process, first, a division area (division division area) having a high access frequency and a large number of divisions is selected from the division division information recording unit (S51). At this time, for example, the divided area having the highest access frequency may be selected, or a reference value of the access frequency may be defined, and all the divided areas exceeding the reference value may be selected.

Next, it is checked whether or not the storage medium has a continuous free area corresponding to the number of the selected partition areas (S52). If there is no free area, the process ends. If there is a continuous free area, the data of each partitioned area of the continuous data is re-recorded there (S53). Then, the original partitioned area is set as an empty partitioned area, the information of the defragmented divided partitioned area is deleted from the divided partitioned information storage unit (S54), and the process is terminated.

In the above-described processing, it does not matter in particular how much the access frequency or the number of divisions is determined to determine the selection.

Thus, in the processing according to the third aspect of the present invention in the rewritable information recording / reproducing apparatus of this embodiment, the division number is considered in each division area as division information. Can be subjected to defragmentation, and a more efficient data access state of the recording medium can be realized.

(4) Processing characteristic of the rewritable information recording / reproducing apparatus according to claim 4 of the present invention in the rewritable information recording / reproducing apparatus shown in FIG.

In this rewritable information recording / reproducing apparatus, the controller 2, the reproduction control procedure program 5, the divided section information storage section 8, and the like, divide and record continuous data over a plurality of section areas which are not adjacent to the storage area. When the data is divided, the divided data indicating the divided area in which the divided data is recorded is stored, and the continuous data is divided and recorded in correspondence with the stored divided data. It functions as a division distance storage unit that stores a division distance indicating the distance between the divided regions.

The controller 2, the reproduction control procedure program 5, and the division section information storage section 8 and the like, when reproducing continuous data, access frequency storage means for storing the access frequency to each division area in association with the division section information. Perform the function of

Further, the controller 2, the defragmentation control procedure program 6, etc., select the divided section information having a high access frequency and a long divided distance from the divided section information stored in the divided section information storage means. It functions as a defragmentation control unit that rewrites data recorded in each of the divided areas indicated by the divided section information into continuous divided areas.

FIG. 8 is a flowchart showing a reproduction control process including division distance registration when reproducing continuous data recorded on the recording medium 12. FIG. 9 is a flowchart illustrating a defragmentation control process for continuously dividing the divided partitioned area in the divided state recorded in the recording medium 12 when the access frequency is high and the divided distance is long. Note that “S” in the figure indicates a step.

As shown in FIG. 8, in this reproduction control processing, first, it is determined whether or not continuous data to be reproduced is stored in a plurality of non-adjacent divided areas (divided divided areas) in the recording medium. Check (S61).

If it is stored in a plurality of partition areas, it is checked whether or not it is registered in the table of the partition information storage unit (S62). It is registered in the section area item, and the value of the division distance indicating the sum of the distances between the respective section areas is stored in the division distance item in correspondence with the section area item (S6).
3).

Thereafter, the value of the access frequency corresponding to the divided area in the divided area information storage unit is incremented by "1" (S64), and the operation is performed through the recording / reproducing engine interface so that the recording / reproducing engine performs the reproducing operation (S64). S65). Then, the reproduction data is transferred to the host computer through the host interface (S66), and this process ends.

If the reproduction area is not stored in a plurality of non-adjacent divided areas in the processing of S61 described above,
The processing of S6 and S66 is executed as a normal reproduction operation, and the processing ends.

Further, if the registration has been made in the above-mentioned processing of S62, the value of the access frequency corresponding to the divided area in the divided area information storage unit is incremented by "1" (S6).
4) The operation is performed through the recording / reproduction engine interface so that the recording / reproduction engine performs the reproduction operation (S6).
5). Then, the reproduction data is transferred to the host computer through the host interface (S6).
6), this process ends.

Note that the processing of S65 and S66 is performed by the unique reproduction / reproduction in the rewritable information recording / reproduction apparatus to which the present invention is applied.
And the data transfer operation. In particular, the order of the processes in S61 to S64 may be changed.

As shown in FIG. 9, in this defragmentation control processing, first, a partition area (divided partition area) having a high access frequency and a long divided distance is selected from the divided partition information recording unit (S61). At this time, for example, the divided area having the highest access frequency may be selected, or a reference value of the access frequency may be defined, and all the divided areas exceeding the reference value may be selected.

Next, it is checked whether or not the storage medium has continuous free areas of the number corresponding to the selected partition area (S62). If there is no free area, the process ends. If there is a continuous free area, the data of each section area of the continuous data is re-recorded there (S63). Then, the original partitioned area is set as an empty partitioned area, the information of the defragmented divided partitioned area is deleted from the divided partitioned information storage unit (S64), and the process is terminated.

In the above-described processing, it does not matter in particular how much the access frequency or the division distance is determined to determine the selection.

Thus, in the rewritable information recording / reproducing apparatus of this embodiment, the processing according to claim 4 of the present invention takes into account the division distance in each division area as division information. Defragmentation can be used to reflect the degree of segmentation in detail and to have the greatest impact on access,
It is possible to realize a state of the recording medium that allows more efficient data access.

(5) Processing characteristic of the rewritable information recording / reproducing apparatus according to claim 5 of the present invention in the rewritable information recording / reproducing apparatus shown in FIG.

In the rewritable information recording / reproducing apparatus, when the controller 2, the defragmentation control procedure program 6, etc. re-records data in a continuous partitioned area, the storage area is one of the continuously recordable partitioned areas. Functions as a means for selecting a continuous divided area closest to the required number of divided areas.

The rewritable hand information recording / reproducing apparatus is characterized in that, in the above-described defragmentation control processing, the smallest area is selected as a method of selecting a continuous area.

In the processing of S23 of FIG. 2, S53 of FIG. 7, and S63 of FIG. 9, when there are a plurality of continuous free areas for re-recording data in the divided area, necessary for recording continuous data. A continuous section area closest to the number of sections is selected, and data is recorded in the continuous section area.

Thus, in the rewritable information recording / reproducing apparatus of this embodiment, the processing according to claim 5 of the present invention uses a continuous vacant area for re-recording data of a divided section area in a minimum range. By selecting from, the state of the storage medium with higher data recording efficiency can be realized.

(6) Processing characteristic of the rewritable information recording / reproducing apparatus according to claim 6 of the present invention in the rewritable information recording / reproducing apparatus shown in FIG.

In this rewritable information recording / reproducing apparatus, when the controller 2, the recording control procedure program 4, etc., divides and records continuous data over a plurality of non-adjacent divided areas based on the empty state of the storage area. And performs the function of recording control means for recording the divided section information indicating the divided area in which the divided data is recorded in the divided section information storage means.

This rewritable information recording / reproducing apparatus is characterized in that, when recording from a host computer (not shown), continuous data is divided and recorded, partition area information is registered in a divided partition information storage unit. ing.

FIG. 10 is a flowchart showing a recording control process when recording continuous data from an externally connected host computer on a recording medium. In this recording control processing, continuous data is received from the host computer through the host interface (S71).

It is checked whether or not the received continuous data is divided into a plurality of non-adjacent divided areas on the recording medium and recorded (S72). If the recording is possible in the continuous divided areas, the recording operation is performed to the recording / reproducing engine through the recording / reproducing engine interface (S74), and this processing ends.

When recording is performed by dividing into a plurality of non-adjacent divided areas, the divided area to be recorded is registered in the divided section information storage unit (S73), and a recording operation is performed on the recording / reproducing engine through the recording / reproducing engine interface (S73). S
74), this process ends. Here, the process of S74 is a recording operation unique to the information recording / reproducing apparatus to which the present invention is applied, and in particular, the order of the processes of S72 to S73 may be reversed.

As described above, in the processing according to claim 6 of the rewritable information recording / reproducing apparatus of this embodiment, since the divided area divided at the time of recording is registered, the continuous area is surely grasped. The continuous section having the minimum capacity can be used as a continuous section in which continuous data is re-recorded, and a defragmentation operation can be performed on a divided section area where continuity is desired more accurately.

[0094]

As described above, according to the rewritable information recording / reproducing apparatus of the present invention, defragmentation can be performed without spending much time even when repeatedly deleting and recording different files on the recording medium. This makes it possible to achieve a recording state in which data access delay during reproduction is efficiently suppressed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a rewritable information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a divided section information storage unit 8 of a RAM 7 shown in FIG.
FIG. 3 schematically shows information stored in a table format.

FIG. 3 is a flowchart showing a reproduction control process when reproducing continuous data recorded on a recording medium 12 in the rewritable information recording / reproducing apparatus shown in FIG. 1;

FIG. 4 is a flowchart showing a defragmentation control process for performing continuous partitioning when the frequency of access to a divided area in a divided state recorded on the recording medium 12 is high in the rewritable information recording / reproducing apparatus shown in FIG. 1; .

FIG. 5 is a flowchart showing a defragmentation control process for performing continuous partitioning when the access frequency of the divided partitioned area in the divided state recorded on the recording medium 12 in the rewritable information recording / reproducing apparatus shown in FIG. It is.

FIG. 6 is a flowchart showing a reproduction control process including registration of the number of divisions when reproducing continuous data recorded on the recording medium 12 in the rewritable information recording / reproducing apparatus shown in FIG.

FIG. 7 is a defragmentation control for performing continuous partitioning when the frequency of access to a divided area in a divided state already recorded on the recording medium 12 in the rewritable information recording / reproducing apparatus shown in FIG. 1 is high and the number of divisions is large; It is a flowchart which shows a process.

FIG. 8 is a flowchart showing a reproduction control process including registration of a division distance when reproducing continuous data recorded on the recording medium 12 in the rewritable information recording / reproducing apparatus shown in FIG.

9 is a defragmentation control in which a divided area recorded in the recording medium 12 in a divided state in the rewritable information recording / reproducing apparatus shown in FIG. It is a flowchart which shows a process.

10 is a flowchart showing a recording control process when recording continuous data from an externally connected host computer to a recording medium in the rewritable information recording / reproducing apparatus shown in FIG. 1;

FIG. 11 is a schematic diagram of a data recording state in a storage area of a recording medium.

[Explanation of symbols]

1: host interface 2: controller 3: ROM 4: recording control procedure program 5: reproduction control procedure program 6: defragmentation control procedure program 7: RAM 8: divided section information storage unit 9: work area unit 10: recording / reproduction engine interface 11: Recording / reproduction engine 12: Recording medium 13: Internal bus

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 5B082 CA11 DD04 EA01 5D044 BC05 BC06 DE13 DE22 DE27 DE96 EF05 GK11 5D110 AA17 AA19 BB20 CA02 CA32 CB06 CC02 CD02 CD05 CJ03 CK02 DA02 DA03 DA11 DA12 DA15 DB03 DB12 DD13 DE03

Claims (6)

[Claims] 1. A storage area of a rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas so that a random position with respect to the storage area is obtained. In the rewritable information recording / reproducing apparatus which records and reproduces data at a time, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Divided section information storage means for storing divided section information indicating the divided area, and access frequency storage means for storing an access frequency to each divided area in association with the divided section information during reproduction of the continuous data; From among the divided section information stored in the divided section information storage means, the divided section information having a high access frequency is selected. A rewritable information recording / reproducing apparatus provided with defragmentation control means for re-recording data recorded in each of the divided areas shown in FIG. 2. A storage area of a rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas so that a random position with respect to the storage area is obtained. In the rewritable information recording / reproducing apparatus which records and reproduces data at a time, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Divided section information storage means for storing divided section information indicating the divided area, and access frequency storage means for storing an access frequency to each divided area in association with the divided section information during reproduction of the continuous data; Each time the continuous data is reproduced, an address that is equal to or greater than a preset reference value from among the divided section information stored in the divided section information storage means is used. Defragmentation control means for selecting divided section information of access frequency and re-recording data recorded in each section area indicated by the divided section information in a continuous section area. Information recording and playback device. 3. A storage area of a rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas so that a random position with respect to the storage area is obtained. In the rewritable information recording / reproducing apparatus which records and reproduces data at a time, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Divided section information storage means for storing divided section information indicating the divided area, and dividing the continuous data in accordance with the divided section information stored by the means to indicate the number of divided areas recorded by dividing the continuous data. Means for storing the number of divisions to be stored, and access for storing the access frequency to each partitioned area in association with the divided partition information when the continuous data is reproduced. A frequency storage unit, and selects divided partition information having a high access frequency and a large number of divisions from the divided partition information stored in the divided partition information storage unit, and records the divided partition information in each of the partition areas indicated by the divided partition information. Rewritable information recording / reproducing apparatus provided with defragmentation control means for re-recording data in continuous divided areas. 4. A storage area of a rewritable recording medium is divided into a plurality of divided areas each having a predetermined size, and continuous data is divided and stored in units of the divided areas so that a random position with respect to the storage area is obtained. In the rewritable information recording / reproducing apparatus which records and reproduces data at a time, when continuous data is divided and recorded over a plurality of partitioned areas which are not adjacent to the storage area, the divided data is recorded. Division section information storage means for storing divided section information indicating the divided section areas, and a division distance indicating the distance between the divided areas recorded by dividing the continuous data in accordance with the divided section information stored by the section. And a division distance storage unit for storing the frequency of access to each of the divided areas in association with the divided section information when the continuous data is reproduced. Access frequency storage means; and division section information having a high access frequency and a long division distance selected from division section information stored in the division section information storage section, and recorded in each section area indicated by the division section information. A rewritable information recording / reproducing apparatus, comprising: defragmentation control means for re-recording recorded data in continuous divided areas. 5. The rewritable information recording / reproducing apparatus according to claim 1, wherein the defragmentation control means includes a step of re-recording the data in a continuous partitioned area. A rewritable information recording / reproducing apparatus characterized by comprising means for selecting a continuous partitioned area closest to the required number of partitioned areas from among the continuously recordable partitioned areas. 6. The rewritable information recording / reproducing apparatus according to claim 1, wherein continuous data is divided over a plurality of non-adjacent divided areas based on an empty state of the storage area. A rewritable information recording / reproducing apparatus, comprising: recording control means for, when recording, recording division section information indicating a division area in which each of the divided data is recorded in the division section information storage means.