JP2008217992A - Information processing method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording device where a recording medium, having reliability and a cost being mostly suitable for use, can be used. <P>SOLUTION: The information recording device has a file management part 5 performing recording, by using a sector corresponding to data of fixed quantity as an unit and classifying information signals recorded in a recording medium 101 into groups of two or more depending on the level of importance; and a recording and playback part 6 performing recording processing that is different for each group for the recording medium 101, performing collation of the information signals recorded in the recording medium 101 for the information signals of which the importance is high, and performing recording for the other sectors, when a defective sector is detected. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information recording method and apparatus for managing defective sectors and recording data for an information recording apparatus such as a hard disk or an optical disk that uses a sector as a recording unit.

  Normally, in a hard disk or optical disk, even if there is a defective sector in the recording medium, the defective sector management system in the drive performs a replacement process, and from the side using the drive, a process that makes it appear as if there is no defective sector is performed. ing.

  In general, when recording is performed on a recording medium 101 such as a hard disk or an optical disk, data is sent via the OS. As shown in detail in FIG. 17, the data is stored in an OS core 105. The file system 104, the device driver 103, and the device 102 are sequentially recorded on the recording medium 101 through each hierarchy.

  Further, data reproduced from the recording medium 101 is passed to the application via each layer of the device 102, device driver 103, file system 104, and OS core 105 in order.

  Here, when recording or reproducing with respect to the recording medium 101, since the device 102 performs defective sector processing, it can be handled from the level above the device driver 103 so that there is no apparent defect.

  There are various defective sector processing methods performed in the device 102. Typical methods include a slipping method and a linear replacement method.

  In the slipping method, the next sector which is physically continuous is used as a substitute sector in place of the defective sector found in the medium inspection of the disk initialization.

  For example, when the twelfth physical address is a defective sector as indicated by A in FIG. 18, the thirteenth physical address subsequent to the twelfth physical address is provided after the twelfth logical address as indicated by B in FIG. Subsequent continuous sectors are used as alternative sectors.

  Since the slipping method uses the next sector, seek time to the replacement sector is unnecessary and there is almost no decrease in the data transfer speed of the drive, but it is necessary to find and register all defective sectors before starting use. Therefore, it is necessary to inspect the recording medium for defects in advance.

  In the linear replacement method, a sector for replacement processing is prepared in advance at the time of disk initialization, and when a defect is found, the sector at that location is used in place of the defective sector.

  For example, as shown by A in FIG. 18, the twelfth physical sector is a defective sector, but the 100th physical address and the following are prepared as replacement areas. At this time, the physical address corresponding to the twelfth logical address is made to correspond to the 100th physical address of the replacement area instead of the twelfth physical sector which is a defective sector.

  The linear replacement method is used for processing defective sectors found after the use of a recording medium is started. In the linear replacement method, since the replacement sector is arranged at a location away from the defective sector, an extra seek time is required. This causes a decrease in the data transfer rate of the drive, so that sound and video may be interrupted during recording and playback of audio and video data.

Japanese Patent Application Laid-Open No. 06-103577

  By the way, the types of digital audio and video information recorded on the recording medium include stream data such as audio and video, stream data attributes, information that records the playback order of stream data, and how the stream is divided and recorded. There is information on whether or not it is arranged on the medium, information on the used area only on the recording medium, and the like.

  In the conventional defective sector management method, the defective sector processing is uniformly performed regardless of the contents of the recorded data. Therefore, even when the defective sector exists on the stream data, the defective sector is displayed on the stream arrangement information data. If it exists, it will be handled as well.

  In this case, if this defective sector is processed by the linear replacement method, there is no problem in the arrangement information data portion, but the stream data portion can be correctly recorded and reproduced due to a decrease in the data transfer rate. There is a risk of disappearing.

  On the other hand, if the slipping method is used, the transfer rate does not decrease for the defective sector processing existing from the start of use of the recording medium, but it is necessary to inspect the front surface of the recording medium before starting recording, It leads to cost increase. Further, according to the slipping method, there remains a problem that it is not possible to cope with a defective sector generated after the start of use.

  Furthermore, in consideration of the cost of the recording medium, it is desirable to perform replacement processing for arrangement management information but not replacement processing for stream data in applications where the quality of recorded audio and video information is not so important. There is a case.

  An information recording method and apparatus according to the present invention are made in view of the above-described circumstances, and prevent a transfer rate from being lowered due to the type of digital audio and video signals recorded on a recording medium. An object of the present invention is to provide an information recording method and apparatus that do not lead to an increase in cost.

  In order to solve the above-described problem, an information recording method according to the present invention is an information recording method in which recording is performed in units corresponding to a certain amount of information signal, and an information signal to be recorded on the recording medium is recorded. There are a classification step for classifying into two or more groups according to the contents of the information signal, and a recording step for performing different recording processes for each group on the recording medium according to the group of information signals in the classification step.

  An information recording apparatus according to the present invention is an information recording apparatus in which recording is performed in units of sectors corresponding to a certain amount of information signal, and the information signal to be recorded on the recording medium is recorded in accordance with the content of the information signal. Classification means for classifying into the above groups, and recording means for performing different recording processing for each group on the recording medium according to the group of information signals in the classification means.

  According to the information recording method of the present invention, it is possible to use a recording medium having the most suitable reliability and cost for the application by changing the defective sector processing method according to the information to be recorded.

  In addition, according to the information recording apparatus of the present invention, it is possible to use a recording medium having the most suitable reliability and cost for the application by changing the defective sector processing method according to the information to be recorded.

  Hereinafter, an information recording method and apparatus according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the information recording apparatus includes a user input / output unit 1 that receives data from a user who uses the information recording apparatus and outputs data to the user, and a stream input / output that is a data flow. A stream input / output unit 3 for recording data, and a recording / reproducing unit 6 for recording / reproducing data to / from the recording medium 101.

  The user input / output unit 1 is a so-called user interface for receiving an input of a command or the like from the user and transmitting the state of the information recording apparatus to the user. For example, the user input / output unit sends data input from a keyboard as an input unit to the system control unit, and outputs data given from the system control unit 2 to a liquid crystal panel as an output unit.

  Under the control of the system control unit, the stream input / output unit 3 receives a stream input to the information recording apparatus, sends it to the buffer, and outputs a stream supplied from the buffer. The data handled by the stream input / output unit 3 is, for example, an MPEG standard encoded image bit stream.

  The recording / reproducing unit 6 records / reproduces information signals to / from the recording medium 101 under the control of the file management unit. That is, the data sent from the buffer is recorded on the recording medium 101, and the data read from the recording medium 101 is sent to the buffer 4.

  Here, as the recording medium 101, for example, a magneto-optical disk can be used. For the recording medium 101 of the magneto-optical disk, the recording / reproducing unit 6 records data on the signal recording surface of the disk with a head and reproduces the data from the signal recording surface with a pickup.

  The information recording apparatus also temporarily transmits data sent between the file management unit 5 that manages files in the recording medium 101 via the recording / reproducing unit 6, the stream input / output unit 3, and the recording / reproducing unit 6. And a system control unit 2 for controlling the entire information recording apparatus.

  The file management unit 5 considers the configuration of the file in the recording medium 101 under the control of the system control unit 2, and the recording / reproducing unit 6 performs appropriate data recording / reproduction on the recording medium 101. And the buffer 4 is controlled.

  In addition, when a defective sector occurs in the recording medium 101, the file management unit 5 grasps the file type of the defective sector so that defective sector processing corresponding to the data type is performed. The processing of this defective sector will be described later.

  The buffer 4 temporarily stores data sent between the stream input / output unit 3 and the recording / reproducing unit 6 under the control of the system control unit 2 and the file management unit 5. For the temporary storage of data in the buffer 4, for example, a FIFO (First In First Out) which is a first-in first-out storage means is used.

  The system control unit 2 is a control unit that controls the entire information recording apparatus. Specifically, the system control unit 2 controls the user input unit 2, the stream input / output unit 3, the buffer 4, and the file management unit 5 to control data recording / reproduction with respect to the recording medium 101.

  In addition, the system control unit 2 executes a series of procedures for managing defective sectors generated in the recording medium 101. The management of defective sectors executed by the system control unit 2 will be described later.

  Next, processing of defective sectors in the information recording apparatus will be described. Information recorded on the recording medium by this information recording apparatus is divided into the following three groups.

  That is, the information in the information recording device includes a first group for information used by the file management system for file management, a second group for audio and video stream data files, information for explaining the contents of the stream, It is divided into a third group for files storing the order of reproduction and the like.

  These groupings are performed by the file management system in the file management unit according to instructions from the system control unit of the information recording apparatus.

  The above groups are different in importance. That is, the importance of the first group related to file management is the highest, followed by the third group related to the explanation of the contents of the stream, etc., and the importance of the information of the second group containing the stream file is the lowest. In accordance with the difference in importance, the management method of defective sectors is also different.

  The first group of information used by the file management system for file management is highly important, so it is necessary to record the information reliably. For this reason, the following is performed as a defective sector management method.

  That is, the information recording apparatus performs reading after writing to the recording medium, and confirms that writing has been performed correctly.

  Further, when an information recording apparatus detects an error at the time of writing to the recording medium or at the time of reading after writing, the information recording apparatus will use another sector in the future. The file management system manages which sector is used after an error is detected. Sector information used in place of the defective sector determined by the file management system is written to the recording medium as first group information.

  Furthermore, the information recording apparatus writes the same data in two or more different sectors of the recording medium. Such overwriting corresponds to defective sectors detected after a lapse of time after writing, such as dust, scratches, and growing defects.

  When a defective sector is detected during reading, the equivalent information written in another location is read and written in a new location determined by the file management system. In the future, the new sector is used. Also in this case, information on the position of the new sector is written as information on the first group.

  Since the second group information about the audio and video stream data files needs to be written within a predetermined time, it cannot be confirmed whether or not the writing has been performed correctly by reading. .

Therefore, the following status is prepared for each allocation extent (AE) constituting the file, and defective sector management is performed.
01 Used as part of a file 11 Used as part of a file, including a defective sector 00 Unused, usable 10 Unused, because it contains a defective sector, an unusable information recording device is defective when writing to a recording medium When a sector is found, the sector in which the defective sector is found is set as one allocation extent, and its status is set to 10.

  Thereafter, the data recording to the recording medium is performed while avoiding the sector in which the status of the allocation extent is “10” and it is indicated that it cannot be used because it is a defective sector.

  As described above, when the status of the allocation extent is set to 10 corresponding to the defective sector, the data is continuously arranged by skipping the defective sector. As a result, the recording area is reduced due to the presence of the defective sector, and there is a case where the recording area overlaps with the used area. In that case, the recording of the data may be transferred to the next allocation extent.

  Such processing is possible only after the contents of data in which the defective sector management system is arranged can be interpreted. In this method, it is possible to obtain the same performance as that of the slipping method without a defect inspection of the recording medium in advance.

  When the information recording apparatus finds a defective sector at the time of writing to the recording medium, the status of the allocation extent including the sector where the defect is found can be simply set to “11”. By setting the status of the allocation extent to “11”, it is indicated that the sector is in use as a part of the file but includes a defective sector.

  Thus, when the allocation extent for the defective sector is set to “11”, this is an effective method for applications in which the quality of recorded audio and video data is not so much a problem.

  In this case, since this portion can be avoided and used at the next writing, the defective sector is not used after the next time. In other words, it is the same as inspecting a medium with recorded data.

  When the information recording apparatus finds a defective sector at the time of reading to the recording medium, the status of the allocation extent including the detected defective sector is set to “11”. Setting the allocation extent to “11” indicates that the sector is in use as a part of the file but includes a defective sector.

  When the information recording apparatus deletes a file from the recording medium, the allocation extent of status 01 releases the area as status 00. That is, the status indicating that the file is being used as part of the file is changed to a status indicating that the file is not used and can be used.

  The allocation extent of status 11 has a defective sector as one allocation extent, and its status is 10. In other words, the status that indicates that a sector is in use but is included as a defective sector is changed to the status of one allocation extent that is unused but cannot be used because it contains a defective sector. To do. Then, other areas are released.

  The following defective sector processing is performed on the third group of the files storing the information explaining the contents of the stream and the reproduction order.

  Unlike the information of the second group, the information of the third group has no restriction that writing must be performed within a predetermined time, and the processing is completed before the recording medium is taken out or the apparatus is stopped. Just do it. For this reason, it can be performed in the same manner as the processing method of the defective sector of the first group.

  That is, after writing to the recording medium of the information recording apparatus, reading from the recording medium is performed, and it is confirmed that writing has been performed correctly on the recording medium. Here, when an error is detected at the time of writing to the recording medium or at the time of reading after writing to the recording medium, another sector is used in the future.

  However, since the information of the third group is less important than the information of the first group described above, multiple writing is not performed.

  Next, an information recording method will be described. In this information recording method, as shown in the flowchart of FIG. 2, recording is performed in units of sectors corresponding to a certain amount of information signal, and the information signal to be recorded on the recording medium depends on the content of the information signal. According to step S1 classified into two or more groups and the group of information signals in step S1, recording is performed on the recording medium by different defective sector processing for each group.

  In step S1, the information signal recorded on the recording medium describes the first group for information used for file management, the second group for audio and video stream data files, and the contents of the stream. It is classified into three groups, a third group for files storing information, reproduction order, and the like.

  The classification into these three groups is based on the importance of the data. That is, the importance of the first group is the highest, the importance of the third group follows, and the importance of the second group is the lowest.

  Since the second group is stream data, it is necessary to maintain the data transfer rate at a predetermined value or higher in order to prevent the data from being interrupted.

  The recording of the information signal on the recording medium in step S2 differs depending on which of the above three groups the information signal belongs to, so each case will be described below. Note that a series of steps shown in the following flowchart is a routine executed in response to a call, and returns when the series of steps is completed.

  As shown in FIG. 3, the basic write routine simply writes data on the recording medium and does not perform verification.

  In the first step S11, writing to the recording medium is executed. In subsequent step S12, it is determined whether or not the writing is normally completed. If the process ends normally, the process proceeds to step S13 with “YES”. If the process does not end normally, the process proceeds to step S14 with “NO”.

  In step S13, “GOOD” is set as a return value, and the process returns. In step S14, "ERROR" is set as a return value and the process returns.

  The basic write and verify routine will be described with reference to FIG. This basic write and verify routine performs verification after basic write to confirm data.

  In the first step S21, the basic write routine shown in FIG. 3 is executed. In the subsequent step S22, the process branches depending on the return value from the basic write routine. That is, when the return value is “GOOD”, the process proceeds to step S23, and when the return value is “NO”, the process proceeds to step S26.

  In step S23, verify is executed, and in the next step S24, the process branches depending on whether the process is normally completed. That is, if the process ends normally, the process proceeds to step S25 with “YES”. If the process does not end normally, the process proceeds to step S26 with “NO”.

  In step S25, "GOOD" is set as a return value and the process returns. In step S26, "ERROR" is set as a return value and the process returns.

  Next, the basic reading routine will be described with reference to FIG. The basic read routine simply reads out data recorded on the recording medium.

  In the first step S31, a reading routine is executed, and in the next step S32, the process branches depending on whether or not the process is completed normally. That is, the process proceeds to step S33 when the process ends normally, and to step S34 when the process does not end normally.

  In step S33, “GOOD” is set as a return value, and the process returns. In step S34, "ERROR" is set as a return value and the process returns.

  Next, the file management information writing routine will be described with reference to FIG. Since the file management information belongs to the first group having high importance, this file management information writing routine multiplexly writes the file management information in order to reliably record the file management information.

  In the first step S41, a write address is obtained for the designated information, and in step S42, the basic write and verify routine shown in FIG. 4 is executed.

  In subsequent step S43, the process branches depending on the return value. That is, when “GOOD”, the process proceeds to step S46, and when “ERROR”, the process proceeds to step S45.

  In step S46, "GOOD" is set as a return value, and in the subsequent process, a series of steps consisting of steps S41, S42, S43 and S46 shown by A in the figure is repeated for the number of times of multiple writing. . Then, after the process indicated by A in the figure is repeated by the number of times of multiple writing, the process returns.

  On the other hand, in step S45, the write address of the designated information is changed, and the process returns to step S42.

  Next, the file management information reading routine will be described with reference to FIG. If the file management information cannot be read by the basic read routine, the file management information read information is the other file management of the file management information multiplexed by the file management information write routine shown in FIG. Read from information.

  In the first step S51, an address at which designated information is written is obtained. In the subsequent step S52, the basic reading routine shown in FIG. 5 is executed, and in step S54, the process branches depending on the return value.

  That is, in the case of “GOOD”, the process proceeds to step S56, and in the case of “ERROR”, the process proceeds to step S55.

  In step S56, "GOOD" is set as a return value and the process returns.

  Processing branches at step S55 depending on whether there is a multiple written sector that has not yet been tried. That is, if there is a multiple written sector that has not been tried yet, “YES” is selected and the process proceeds to step S53.

  In step S53, a sector address which has not been tried and is overwritten is set, and the process proceeds to step S52.

  In step S57, the process returns after "ERROR" is set to a return value.

  Next, a file writing routine other than a stream will be described with reference to FIG. In this routine, data is continuously arranged by skipping defective sectors.

  In the first step S61, an allocation extent is allocated, the address and length of the allocation extent (AE) are obtained, and in the next step S62, the basic write and verify routine shown in FIG. 4 is executed. In the figure, the allocation extent is denoted as AE. The same applies to the following.

  In the subsequent step S63, the process branches depending on the return value. That is, when “GOOD”, the process proceeds to step S65, and when “ERROR”, the process proceeds to step S64.

  In step S64, the sector in which the error has occurred, before and after it are set as different allocation extents, and the status of the allocation extent in which the error has occurred is set to 10. Then, after making the subsequent allocation extent a place to be written next, the process proceeds to step S62.

  As described above, in the allocation extent status, “01” indicates that it is in use as a part of a file, and “11” indicates that it is in use as a part of a file but includes a defective sector. “10” indicates that it is unused and available, and “10” indicates that it is unused but cannot be used because it includes a defective sector.

  Processing branches at step S65 depending on whether all data has been heard. That is, when all the data has been written, the process proceeds to step S66 as “YES”, and when all the data has not been written, the process proceeds to step S61 as “NO”.

  In step S66, “GOOD” is set as a return value, and the process returns.

  Next, a first example of the stream data file write routine will be described with reference to FIG.

  The first example of this stream data file writing routine is to set a defective sector to status 11 and is an effective method for applications in which the quality of audio and video data is not considered as a problem. In this case, since this portion can be avoided and used at the next writing, the defective sector is not used after the next time. In other words, it is the same as inspecting a medium with recorded data.

  In the first step S71, an allocation extent is allocated, and the address and length of the allocation extent are obtained. In the subsequent step S72, the basic write routine shown in FIG. 3 is executed, and in step S73, the return value is determined. Branch by. That is, when “GOOD”, the process proceeds to step S75, and when “ERROR”, the process proceeds to step S74.

  Processing branches at step S75 depending on whether all stream data has been written. If all stream data has been written, “YES” is determined in step S76, and if all stream data has not been written, “NO” is returned to step S71.

  In step S76, “GOOD” is set as a return value, and the process returns.

  Next, a read routine for files other than stream files will be described with reference to FIG.

  In the first step S81, the address and length of the allocation extent are obtained. In the next step S82, the basic reading routine shown in FIG. 5 is executed, and in the subsequent step S83, the process branches depending on the return value. . That is, when “GOOD”, the process proceeds to step S84, and when “ERROR”, the process proceeds to step S85.

  Processing branches at step S84 depending on whether all data has been read. Then, when all the data has been read, “YES” is determined and the process proceeds to step S86. When all the data is not read, “NO” is determined and the process returns to step S81.

  In step S86, "GOOD" is set as a return value and the process returns.

  In step S85, the status of the allocation extent is set to 11, and in subsequent step S87, “ERROR” is set as a return value and the process returns.

  Next, the stream data file deletion routine will be described with reference to FIG.

  In the first step S91, an allocation extent constituting the file is obtained, and in the next step S92, the process branches depending on whether the status of the allocation extent is 01 or not. That is, if the allocation extent status is 01, the process proceeds to step S94 with "YES", and if the allocation extent status is not 01, the process proceeds to step S93 with "NO".

  Processing branches at step S93 depending on whether the status of the allocation extent is 11. That is, when the allocation extent status is 11, the process proceeds to step S95 with “YES”, and when the allocation extent status is not 11, the process proceeds to step S96 with “NO”.

  In step S94, the status of the allocation extent is set to 00, the area is released, and the process proceeds to step S97.

  In step S95, the defective sector and its surroundings are set as different allocation extents, and the status of the defective allocation extent is set as 10. The allocation areas before and after the status are set to 00 and the area is released. Then, the process proceeds to step S97.

  In step S96, "ERROR" is set as a return value and the process returns.

  Processing branches at step S97 depending on whether allocation extents constituting all files have been processed. That is, when all the allocation extents have been processed, “YES” is selected and the process proceeds to step 98. Otherwise, “NO” is determined and the process returns to step S91.

  In step S98, “GOOD” is set as a return value, and the process returns.

  Next, a second example of the stream data file writing routine will be described with reference to FIG. In the second example of the stream data file writing routine, when a defect is found and its status is 10, the data is continuously arranged by skipping the defective sector.

  According to the second example, the storage area may be reduced due to the presence of the defective sector and may overlap with the used area. In this case, the data recording may be transferred to the next allocation extent. This processing is possible only when the contents of data in which the defective sector management system is arranged can be interpreted. With this method, it is possible to obtain the same performance as the slipping method without defect inspection of the recording medium in advance.

  In the first step S101, an allocation extent is allocated, the address and length of the allocation extent are obtained, and in the next step S102, the basic write routine shown in FIG. 3 is executed, and in the subsequent step S103, a return value Branch depending on how. That is, if “GOOD”, the process proceeds to step S105, and if “ERROR”, the process proceeds to step S104.

  In step S104, the sector in which the error has occurred, and before and after that sector are set as different allocation extents, and the status of the allocation extent in which the error has occurred is set to 10. Then, the rear allocation extent is set as a place to be written next.

  Processing branches at step S105 depending on whether all stream data has been written. That is, when all stream data has been written, the process proceeds to step S106 as “YES”, and when all stream data has not been written, the process proceeds to step S101 as “NO”.

  In step S106, “GOOD” is set as a return value and the process returns.

  Next, the stream data file reading routine will be described with reference to FIG.

  In the first step S111, the address and length of the allocation extent are obtained. In the next step S112, the basic read routine shown in FIG. 5 is executed, and in the subsequent step S113, the process branches depending on the return value. That is, from this step S113, the process proceeds to step S114 when "GOOD", and to step S115 when "ERROR".

  Processing branches at step S114 depending on whether all stream data has been read. That is, when all stream data has been read, the process proceeds to step S116 with “YES”, and when all stream data has not been read, the process proceeds to step S111 with “NO”.

  On the other hand, in step S115, the status of the allocation extent is set to 11, and in subsequent step S117, "ERROR" is set as a return value and the process returns.

  In step S116, “GOOD” is set as a return value, and the process returns.

  Subsequently, the defective sector processing of the management information belonging to the first group will be specifically described.

  In the file system descriptor (file system descriptor) that describes the file management information, as shown in FIG. 14, the main MIA that is the main management information area and the start logical sector number of the spare MIA that is the spare management information area are recorded. ing. MIA refers to a management information area (MIA).

  The file system descriptor records the MIB numbers of the MIBs constituting the MIA maps of the main MIA and the spare MIA, and the MIA map in the MIA can be extracted using this information.

  Here, MIB means a sector in the MIA. The MIB number is the number assigned in order to the MIB, with the first MIB in the MIA being 0.

  Such a file system descriptor belongs to the first group having the highest importance. The file system descriptor is multiplexed and written on the recording medium in order to reliably record information.

  Next, the structure of the MIA will be described with reference to FIG.

  FIG. 15 shows an example of the correspondence between MIB numbers and their contents. That is, MIB number 0 is a defective sector, MIB number 1 is an MIA map (0), MIB number 2 is a defective sector, MIB number 3 is a file table (0), and MIB number 4 is an AE table (0). MIB number 5 is the AE table (1), MIB number 6 is the file table (1), MIB number 7 is the MIA map, MIB number 8 is the defective sector, MIB number 9 is the file table (2), MIB number A corresponds to the AE table (2).

  Next, the MIA map will be described. The MIA map holds information about the arrangement state of tables and the like in the MIA.

  The MIA map shown in FIG. 16 includes the MIA map (0) of MIB number 1 and the MIA map (1) of MIB number 7 shown in FIG. The table of 4 rows and 4 columns in the figure corresponds to MIA logical sectors in order. That is, the element in the first row and first column of the table is MIB number 0, the element in the first row and second column is MIB number 1, the element in the first row and third column is MIB number 2, and the first row, first column. The element in the fourth column is MIB number 3, the element in the second row and first column is MIB number 4, the element in the second row and second column is MIB number 5, and the element in the second row and third column is MIB number 6. The element in the second row and fourth column is MIB number 7, the element in the third row and first column is MIB number 8, the element in the third row and second column is MIB number 9, and the third row and third column. Corresponds to the MIB number A, the element in the third row and the fourth column corresponds to the MIB number B, and the element in the fourth row and the first column corresponds to the MIB number C, respectively. The same is true for the following.

  In FIG. 16, “MIA map: 1” indicates that the MIB number of the first MIB constituting the MIA map is 1. Similarly, “file table: 3” indicates that the MIB number of the MIB constituting the file table is 3, and “AE table: 4” indicates that the MIB number that constitutes the AE table is 4. .

  That is, Expression 7 is displayed in the first row and second column of the table corresponding to MIB number 1 of the first MIB constituting the MIA map. This number 7 indicates that the MIB number of the second MIB constituting the MIA map is 7. “FFFF” is displayed in the second row and the fourth column of the table corresponding to the MIB number 7. This “FFFF” indicates that the MIB is the last MIB constituting the MIA map.

  In addition, Expression 6 is displayed in the first row and the fourth column of the table corresponding to the MIB number 3 of the first MIB constituting the file table. This number 6 indicates that the MIB number of the second MIB constituting the file table is 6. In the second row and third column of the table corresponding to the MIB number 6, Expression 9 is displayed. This number 9 indicates that the MIB number of the third MIB constituting the file table is 9. “FFFF” is displayed in the third row and second column of the table corresponding to the MIB number 9. This “FFFF” indicates that the MIB is the last MIB constituting the file table.

Furthermore, Expression 5 is displayed in the second row and first column of the table corresponding to the MIB number 4 of the first MIB constituting the AE table. This number 5 indicates that the MIB number of the second MIB constituting the AE table corresponds to 5. The number A is displayed in the second row and second column of the table corresponding to MIB number 5. This number A indicates that the MIB number of the third MIB constituting the AE table is A. The third row and third column of the table corresponding to MIB number A contains “FFFF
"FFFF" indicates the last MIB constituting the MIBAE table.

  Then, “FFF0” is displayed in the first row, first column, first row, third column, and third row, first column of the table corresponding to MIB number 0, MIB number 2, and MIB number 8 of MIA, respectively. Yes. This “FFF0” corresponds to a defective sector.

  Further, “FFF1” is displayed after the third row and the fourth column of the table corresponding to the unused portion after the MIB number B of the MIA. This “FFF1” indicates that the sector is unused.

  As described above, according to the information recording method of the present invention, it is possible to use a recording medium having the most suitable reliability and cost for the application by changing the defective sector processing method according to the information to be recorded.

  In addition, according to the information recording apparatus of the present invention, it is possible to use a recording medium having the most suitable reliability and cost for the application by changing the defective sector processing method according to the information to be recorded.

It is a block diagram which shows the schematic structure of an information recording device. It is a flowchart which shows a series of processes of the information recording method. It is a flowchart of a basic write routine. 5 is a flowchart of a basic write and verify routine. It is a flowchart of the flowchart of a basic reading routine. It is a flowchart of a file management information write routine. It is a flowchart of a file management information reading routine. It is a flowchart of a file write routine other than a stream. It is a flowchart of the 1st example of a stream data file write-in routine. It is a flowchart of the reading routine of files other than a stream. It is a stream data file deletion routine flowchart. It is a flowchart of the 2nd example of a stream data write routine. It is a flowchart of a stream data file reading routine. It is a figure which shows the structure of a file descriptor. It is a figure which shows the structure of a management information area | region (MIA). It is a figure which shows the structure of a MIA map. It is a figure which shows the hierarchy at the time of the recording of the data on a recording medium. It is a figure explaining the conventional defective sector processing method.

Explanation of symbols

2 system control unit, 3 stream input / output unit, 5 file management unit, 6 recording / playback unit, 101 recording medium

Claims (8)

An information recording method in which recording is performed in units of sectors corresponding to a certain amount of information signal,
A classification process for classifying information signals to be recorded on the recording medium into two or more groups according to the content of the information signal, and a recording process that differs for each group on the recording medium according to the information signal group in the classification process And a recording step of applying information. The above classification process is classified into two or more groups according to the importance of the information signal,
In the recording step, the information signal recorded on the recording medium is collated with respect to the information signal of the group having high importance. When a defective sector is detected by the collation, information corresponding to the defective sector is recorded. 2. The information recording method according to claim 1, wherein the signal is recorded in another sector which is a replacement sector of the defective sector.   The information recording method according to claim 2, wherein the recording step performs multiplex writing in which information signals of the group having a high degree of importance are recorded at a plurality of locations. The classification process is classified into two or more groups according to the continuity of the information signal,
2. The information recording method according to claim 1, wherein when recording information signals of a group having high continuity, a defective sector is detected, and the detected defective sector is skipped and recorded. An information recording apparatus in which recording is performed in units of sectors corresponding to a certain amount of information signal,
Classification means for classifying information signals to be recorded on the recording medium into two or more groups according to the contents of the information signals;
An information recording apparatus comprising: a recording unit that performs a different recording process for each group on the recording medium according to a group of information signals in the classification unit. The classification means classifies the information signal into two or more groups according to the importance of the information signal,
The recording means collates information signals recorded on the recording medium for information signals of a group having high importance, and when a defective sector is detected by the collation, information corresponding to the defective sector is recorded. 6. The information recording apparatus according to claim 5, wherein the signal is recorded in another sector which is a replacement sector of the defective sector.   7. The information recording apparatus according to claim 6, wherein the recording means performs multiplex writing for recording the information signal of the group having a high importance level at a plurality of locations. The classification means classifies the information signal into two or more groups according to the continuity of the information signal,
6. The information recording apparatus according to claim 5, wherein when recording information signals of a group having high continuity, a defective sector is detected, and the detected defective sector is skipped and recorded.

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