JP4281571B2 - Recording apparatus and method, and program - Google Patents

Description

  The present invention relates to a recording apparatus, method, and program, and more particularly, to a recording apparatus, method, and program that can appropriately count the number of times of rewriting (number of times of writing) for each recording area of a rewritable recording medium.

Randomly accessible recording media (for example, optical discs) have come to be used in many fields including broadcasting as the recording density increases (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-136631

  However, for example, the upper limit of the number of rewrites (write times) to the optical disc is about 1000 times. That is, if rewriting is performed with a bias toward a specific location on the optical disc, the number of times of writing reaches the upper limit only at that location, and then writing to that location becomes impossible. The inability to write to a predetermined location in this manner means that it is difficult to secure a large continuous recording area on the optical disk, and as a result, for example, it takes time to seek, so that recording / playback processing is performed. Inconvenience comes to occur.

  In a conventional recording apparatus using an optical disk or the like as a recording medium, information such as the location and size of an empty area formed on the optical disk (hereinafter referred to as empty area data) corresponds to the writing or deletion of data. However, the number of times of writing to the recording medium is not made uniform based on the empty area data.

  Therefore, the applicant of the present application has already invented a recording apparatus capable of equalizing the number of times of writing to the recording medium based on the empty area data, and has filed an application as Japanese Patent Application No. 2002-313781.

  At present, there is an increasing demand for counting the number of times of writing more appropriately than the recording apparatus already invented and applied by the present applicant.

  The present invention has been made in view of such a situation, and makes it possible to more appropriately count the number of times of writing to a randomly accessible recording medium.

The recording apparatus of the present invention includes a writing means for sequentially writing input data in the order of arrangement in one or more empty areas arranged behind a preset recording start position in a recording area of a recording medium. , of the input data written in the recording area by the writing means, the last written first and deleting means for deleting the input data, first input data deleted if the deletion unit, starting recording as the position, sets the head position of the recording area, as the number of times of writing input data to the recording area, and a setting unit to set the value only by adding 1 to the value which has been set as the writing times until then, writing The means is arranged at the first position behind the recording start position set by the setting means in one or more free areas after the first input data is deleted by the deleting means. To come area, write the next second input data.

The deleting unit deletes the first input data, and further, the writing unit outputs third input data different from the first input data from the input data written in the recording area. There was deleted before it is written to the recording medium, when the third input data is deleted by the deleting means, setting means holds the setting of the recording start position, it is possible to hold a set number of write operations.

Further comprising a formatting means for formatting the recording area, if the recording region is formatted by the formatting means, setting means, as a recording start position, set the start position of the recording area, as write count, as the number of writing times until it A value obtained by adding 1 to the set value can be set.

  The writing means can write the data indicating the current number of times of writing set by the setting means into the free area every time the input data is written into the free area.

The recording method of the present invention includes a writing step of sequentially writing input data in the order of arrangement in one or more empty areas arranged behind a preset recording start position in a recording area of a recording medium. Among the input data written to the recording area by the writing step process, a deletion step for deleting the first input data written last, and a case where the first input data is deleted by the processing of the deletion step if, as a recording start position, set the start position of the recording area, as the number of times of writing input data to the recording area, it until a setting step to set the value obtained by adding 1 to the value which has been set as the number of writing In the writing step, after the first input data is deleted by the deleting unit, the setting unit sets one or more free areas. The free space is arranged in the first rear of the recording start position, comprising the step of writing the following second input data.

The program of the present invention includes a writing step of sequentially writing input data in the order of arrangement in one or more empty areas arranged behind a preset recording start position in the recording area of the recording medium, of the input data written in the recording area by the processing of the writing step, the last written first and deletion step of deleting the input data, the first field input data is deleted if the process of deleting step , as the recording start position, set the start position of the recording area, as the number of times of writing input data to the recording area, it until a setting step to set the value only by adding 1 to the value which has been set as the number of writing In the writing step, after the first input data is deleted by the deleting unit, the setting unit sets one or more free areas. The free space is arranged in the first rear recording start position, comprising the step of writing the following second input data.

In the recording apparatus and method, and the program of the present invention, input data in one or more empty areas arranged behind a preset recording start position in the order of arrangement in the recording area of the recording medium. There written sequentially, of the input data written in the recording area, a first input data written last is removed, if the first input data is deleted, as the recording start position, a recording area Is set , and the value obtained by adding 1 to the value set as the number of times of writing is set as the number of times of writing the input data to the recording area. After the first input data is deleted, the next second input data is written into the first empty area located behind the recording start position set by the setting means among the one or more empty areas. It is .

  As described above, according to the present invention, the number of times of writing to a randomly accessible recording medium can be made uniform. In particular, the number of times of writing can be appropriately counted.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration example of a recording apparatus 1 to which the present invention is applied.

  The recording device 1 performs an editing process such as recording data on the optical disc 2 or deleting data recorded on the optical disc 2.

  As illustrated in FIG. 1, the recording apparatus 1 includes an input data processing unit 11 to a control unit 16.

  The input data processing unit 11 includes a video / audio interface, an encoder, a buffer memory, and the like. For example, the input data processing unit 11 performs encoding processing and audio processing on an image signal input from an imaging device (not shown) or an audio signal input from a microphone. The data obtained as a result is supplied to the drive 15 via the control unit 16.

  Specifically, for example, in the present embodiment, an image signal recorded by a video recorder (not shown) (accurately, an imaging device mounted thereon) and a corresponding audio signal (accurately mounted on it) Audio signal recorded by the recorded microphone) is input to the recording apparatus 1. Hereinafter, image signals and audio signals output from such a video recorder are collectively referred to as AV signals as appropriate. When the AV signal is converted into data, the data is appropriately referred to as AV data.

  Furthermore, in the present embodiment, the unit of AV data processed by the recording apparatus 1 is clip data. A clip is a unit of the number of times of imaging processing of a video recorder. In addition, the clip indicates a unit indicating the time from the start of imaging to the end of imaging of the imaging process, a unit indicating the length of various data obtained by the imaging process, or the imaging A unit indicating the data amount of various data obtained by processing is indicated. Furthermore, the clip may also indicate the collection of various data itself.

  Here, it is assumed that the clip is a unit as follows. That is, a video recorder is generally provided with a button for instructing the start or end of recording (hereinafter referred to as a recording button). When the recording button is pressed, recording is started. The AV signal obtained as a result of recording the subject and various signals accompanying it are recorded until the recording is completed after being pressed again (by one imaging process).

  Therefore, here, the clip data refers to AV data obtained by converting the clip into data. Further, the clip data may include newly generated data such as metadata in addition to AV data.

  The storage unit 12 stores data necessary for editing processing performed by the control unit 16 and supplies the stored data to the control unit 16 (in a clip unit in the present embodiment).

  The operation unit 13 is appropriately operated by the user when a predetermined command is input to the control unit 16. The display unit 14 displays a message and an image corresponding to the data supplied from the control unit 16.

  Under the control of the control unit 16, the drive 15 records the input data (in this embodiment, clip data) from the input data processing unit 11 input via the control unit 16 on the optical disc 2. Or the process of deleting data recorded on the optical disc 2 is performed.

  The optical disc 2 is divided into one or more areas (hereinafter referred to as clusters) having a predetermined size as a unit. Therefore, when the drive 15 executes processing such as recording the clip data on the optical disc 2, the clip data is divided into data of the unit (the same size as the cluster) and divided data (hereinafter referred to as cluster data). The process is executed every time.

  For example, when the clip data is recorded on the optical disc 2, the drive 15 divides the clip data into one or more cluster data, and sequentially records each cluster data in each cluster constituting the optical disc 2. . At this time, each time one piece of cluster data is recorded (written), the error determination unit 21 provided in the drive 15 reads the cluster data from the optical disc 2 again to check for errors (normally recorded). When an error is detected, a process of rewriting (retrying) the class data written immediately before to the optical disc 2 is executed.

  Although details will be described later (see FIG. 9 to FIG. 13), when an error is detected in this way, the error determination unit 21 further causes the error to be caused by an external (optical disc) such as the recording device 1 shaking. It is determined whether it is a factor (as viewed from 2) or an internal factor (as viewed from the optical disc 2) such as a scratch on the optical disc 2 itself. Then, the error determination unit 21 executes a retry process according to the determined characteristics of the cause of error occurrence (characteristics of internal or external factors).

  The control unit 16 controls each unit.

  An outline of editing processing in the recording apparatus 1 will be described with reference to the flowchart of FIG. Here, for the sake of simplicity, each process will be described in the order shown in the flowchart of FIG. 2, but the startup process in step S1, the format process in step S5, the data recording process in step S7, and the data deletion process in step S9 Can be performed independently, or can be performed by other devices.

  In step S1, the control unit 16 performs a process of starting the recording apparatus 1 when the power is turned on, for example. Details of this processing will be described later with reference to the flowchart of FIG.

  Next, in step S2, the control unit 16 determines whether there is data to be restored. When it is determined in step S2 that there is data to be restored, the control unit 16 controls the drive 15 to restore the data to be restored on the optical disc 2 in step S3. Details of the data restoration processing (steps S2 and S3) will be described later with reference to FIGS. 32, 35, and 36.

  In this way, when data is restored in the process of step S3, or when it is determined in step S2 that there is no data to be restored (not present), the process proceeds to step S4.

  In step S4, the control unit 16 determines whether or not the format of the optical disc 2 is requested from the operation unit 13. If it is determined that the format is requested, the control unit 16 controls the drive 15 in step S5 to control the optical disc 2. Execute the formatting process. Details of this processing will be described later with reference to the flowchart of FIG.

  In this way, when the optical disc 2 is formatted in the process of step S5, or when it is determined in step S4 that there is no request for formatting, the process proceeds to step S6.

  Next, in step S6, the control unit 16 determines whether or not data recording is requested from the operation unit 13, and if it is determined that data recording is requested, the control unit 16 controls the drive 15 in step S7. Thus, the data input from the input data processing unit 11 is recorded on the optical disc 2. Details of this processing will be described later with reference to the flowchart of FIG.

  When it is determined in step S6 that data recording is not requested, or when data is recorded in step S7, in step S8, the control unit 16 requests the operation unit 13 to delete data. In step S9, the requested data is deleted. If it is determined whether deletion of data has been requested, the requested data is deleted. Details of this processing will be described later with reference to the flowchart of FIG.

  When it is determined in step S8 that deletion of data has not been requested, or when data has been deleted in the process of step S9, in step S10, the control unit 16 determines whether or not there is a command to end editing. If it is determined that the command has been issued, the process proceeds to step S11. For example, when the optical disc 2 is removed, the process proceeds to step S11 on the assumption that the editing end is instructed.

  In step S11, the control unit 16 controls the drive 15 to perform the processing in steps S1, S7, and S9 together with free area data (information such as the size and location of the free area used in the conventional recording apparatus). The free area rewrite management data created in step 1 is recorded on the optical disc 2.

  Note that the processing in step S11 may be performed when the optical disc 2 is taken out or when the power is turned off.

  Thereafter, the process ends.

  On the other hand, in step S10, the control unit 16 determines whether or not there is a command to end editing. If it is determined that there is no command, the control unit 16 returns the process to step S4 and repeats the subsequent processes.

  Next, the activation process in step S1 of FIG. 2 will be described with reference to the flowchart of FIG.

  In step S21, the control unit 16 creates a current queue 101, a next queue 102, a write count column 103, and a recording start position column 104 on the storage unit 12, as shown in FIG. The created current queue 101 to recording start position column 104 are empty.

  Next, in step S22, the control unit 16 determines whether or not free space rewriting management data is recorded on the optical disc 2, and if it is determined that it is not recorded, the control unit 16 proceeds to step S23. There is no free space in the optical disc 2 on which data has not been written or deleted (edited) by the recording device 1 (that is, the optical disc 2 in which free area rewrite management data has not been recorded in step S11 in FIG. 2). Since the area rewrite management data is not recorded, when such an optical disc 2 is loaded, the process proceeds to step S23.

  In step S23, the control unit 16 determines whether or not free area data is recorded on the optical disc 2. If it is determined that free area data is recorded, the process proceeds to step S27.

  In step S27, the control unit 16 stores, in the current queue 101 created in the storage unit 12, area information of all the empty areas existing on the optical disc 2 at the time of mounting (in this example, the area start position and size of the empty area). ) Are set in the order of the positions on the addresses of the free areas.

  For example, if there are free areas A to D as shown in FIG. 5 on the optical disc 2, the current queue 101 contains the area start positions of the free areas A to D as shown in FIG. And the magnitude | size is set in order of an area | region head position. Here, the position of the free area is represented by, for example, a logical block number representing the order of each logical sector number for each block, and the size is represented by the number of blocks belonging to the free area.

  In the present embodiment, the position 000000 indicates the start position of the recording area of the optical disc 2. Further, the recording area refers to an area in which clip data can be recorded in the present embodiment.

  In the following, setting the area information as described above will be referred to as registering a free area.

  Next, in step S25, as shown in FIG. 6, the control unit 16 initially sets 1 in the write count column 103 created in the storage unit 12, and in step S26, in the record start position column 104, The initial position (position 00000) of the optical disc 2 (in the recording area) is initialized. In FIG. 5, an upward arrow 104A represents a value set at the recording start position 104 in FIG. 6, that is, the recording start position. Therefore, hereinafter, the arrow 104A is referred to as a recording start position 104A.

  If it is determined in step S23 that no free area data is recorded, the process proceeds to step S24. Since the empty area data is not recorded on the optical disk 2 that has not been formatted by the recording apparatus 1 or the conventional recording apparatus in the state as shipped, when such an optical disk 2 is loaded, Proceed to step S24.

  In step S24, the control unit 16 registers the entire recording area of the optical disc as one free area in the current queue 101 of the storage unit 12. Thereafter, the process proceeds to step S25.

  If it is determined in step S22 that free area rewrite management data is recorded, the process proceeds to step S28. The free space rewriting management data means all the data set in each of the current queue 101 to the recording start position column 104 as shown in FIG. 6, and this data has been subjected to editing processing. Recording is performed on the optical disc 2 in step S11 (FIG. 2).

  In step S28, the control unit 16 registers the free area (the area information) registered in the current queue 101 included in the free area rewrite management data in the current queue 101 generated in the storage unit 12, and the free area is rewritten. The free area registered in the next queue 102 included in the area rewrite management data is registered in the next queue 102 generated in the storage unit 12. In step S29, the control unit 16 sets the value set in the write count column 103 included in the free area rewrite management data in the write count column 103 generated in the storage unit 12, and in step S30. Then, the value set in the recording start position column 104 included in the empty area rewriting management data is set in the recording start position column 104 of the storage unit 12.

  In other words, the free space rewriting management data recorded on the optical disc 2 is read into the storage unit 12 by the processing from step S28 to step S30.

  When a predetermined value is set in the recording start position column 104 in step S26 or step S30, the process proceeds to step S2 in FIG.

  Next, the formatting process in step S5 in FIG. 2 is referred to with reference to the flowchart in FIG. 7, the data recording process in step S7 in FIG. 2 is referred to, and the data deletion in step S9 in FIG. The process will be described with reference to FIG. 14. First, the outline will be described according to each flowchart, and then will be described again based on a specific example.

  First, the format process will be described. In the present embodiment, as described above, the unit of data recorded on the optical disc 2 (the unit viewed in a macro rather than the above-described cluster) is the clip data. Therefore, in step S31 of FIG. 7, the control unit 16 deletes all of the clip data recorded on the optical disc 2. That is, in the present embodiment, even if the optical disc 2 is formatted, the free area rewrite management data is retained without being deleted.

  For example, the empty area rewrite management data can be recorded in a special area different from the recording area on the optical disc 2. In such a case, for example, in step S31, the control unit 16 formats the recording area of the optical disc 2.

  In step S32, the control unit 16 increments the write count in the write count column 103 of the storage unit 12 by 1, and in step S33, the value in the record start position column 104 (that is, the record start position 104A) is changed. Return to the top position (position 00000) of the optical disc 2 (recording area).

  Next, in step S34, the control unit 16 stores in the current queue 101 of the storage unit 12 the area information of all the free areas that exist on the optical disc 2 at that time (at the time after formatting) (in this example, free space). The area start position and size of the area are registered in the order of the position on the address of the empty area, and the next queue 102 of the recording unit 12 is emptied in step S35.

  Thereafter, the processing proceeds to step S6 in FIG.

  Next, the data recording process will be described. That is, in step S41 in FIG. 8, the control unit 16 registers an empty area in the current queue 101 generated in the storage unit 12 in step S24, step S27, or step S28 in FIG. 3 or step S34 in FIG. If it is determined whether or not a free area is registered, the process proceeds to step S42, and the free area registered in the current queue 101 is located at the forefront of the address (that is, the current area). The empty area (closest to the recording start position 104A) is determined as an area for writing data.

  Next, in step S43, the control unit 16 executes a data writing process. That is, the control unit 16 controls the drive 15 to record the data input by the input data processing unit 11 in the empty area determined in step S42 on the optical disc 2. Details of the data writing process will be described later with reference to the flowchart of FIG.

  In step S44, the control unit 16 changes the area information of the empty area where the data is written in accordance with the written data amount. Specifically, the area start position and size are changed to indicate that of an empty area formed after data is written.

  In step S45, the control unit 16 determines whether or not all of the data to be recorded has been recorded on the optical disc 2, and returns to step S41 if it is determined that the data to be recorded remains unrecorded. The subsequent processing is executed.

  If it is determined in step S45 that all data to be recorded has been recorded, the process proceeds to step S46, and the control unit 16 sets the value in the recording start position column 104 of the storage unit 12 (that is, the recording start position 104A). The position is changed to the data writing end position (the position where the last data is written in the process of step S43).

  If it is determined in step S41 that a free area is not registered in the current queue 101, the process proceeds to step S47, and the control unit 16 increments the number of writes in the write number column 103 of the storage unit 12 by 1 and In step S48, the value in the recording start position column 104 (that is, the recording start position 104A) is returned to the head position (position 00000) on the optical disc 2.

  Next, in step S <b> 49, the control unit 16 moves the free area registered in the next queue 102 to the current queue 101. As a result, the next queue 102 becomes empty.

  In step S50, the control unit 16 determines whether or not a free area is registered in the current queue 101. If it is determined that the free area is registered, the control unit 16 returns to step S42 and executes the subsequent processing.

  If it is determined in step S50 that no free area is registered in the current queue 101, the process proceeds to step S41, and the control unit 16 controls the display unit 14 to display an error message indicating that recording is not possible.

  When the value in the recording start position column 104 (that is, the recording start position 104A) is changed in step S46, or when an error message is displayed in step S51, the process proceeds to step S8 in FIG.

  Here, the details of the data writing process in step S43 (FIG. 8) will be described with reference to the flowchart of FIG.

  As described above, in the present embodiment, the recording unit (large unit) of the optical disc 2 is clip data.

  Therefore, in step S61, the control unit 16 determines whether the next data to be written is the head of the clip data.

  That is, in the present embodiment, when the control unit 16 starts recording (writing) one predetermined clip data to the optical disc 2, in step S61, the next data to be written is the head of the clip data. In step S62, the current writing count (current value in the writing count column 103 of the storage unit 12) is embedded in the header portion of the clip data.

  Thus, in this embodiment, every time each piece of clip data is recorded on the optical disc 2, the number of times of writing at that time is embedded in the header portion of the clip data. However, the embedded number of times of writing is not limited to the header part as long as it is a part associated with the clip data to be recorded, and may be an arbitrary place on the optical disc 2.

  In this way, when the current number of times of writing is embedded in the header portion of the clip data in the process of step S62, or when it is determined that the data to be written next is not the beginning of the clip data in the process of step S61. The process proceeds to step S63.

  In step S63, the control unit 16 controls the drive 15 to write the next data to the cluster to be processed.

  The “next data” written in the process of step S63 is arranged next to the cluster data written immediately before the above-described cluster data in which the clip data to be recorded is divided into cluster units. Points to cluster data.

  Specifically, for example, the data 131 in FIG. 10 is now clip data to be recorded, and the cluster data 131-1 among the cluster data 131-1 to 131-5 obtained as a result of the division of the data 131. To 131-3 are recorded in the clusters (areas) 2-1 to 2-3 of the optical disc 2, respectively. In this case, the cluster data 131-4 arranged next to the cluster data 131-3 is written (recorded) in the cluster (cluster to be processed) 2-4 of the optical disc 2 in the process of step S63.

  In step S64, the control unit 16 controls the error determination unit 21 of the drive 15 to determine whether or not a write error has occurred. That is, as described above, the error determination unit 21 uses the cluster data written in the cluster to be processed on the optical disc 2 in the process of the previous step S63 (in this case, the cluster data 131- written in the cluster 2-4). 4) is read again to check for errors.

  If it is confirmed by this error check that there is no error, it is determined in step S64 that no write error has occurred, and the process proceeds to step S65.

  In step S65, the control unit 16 determines whether or not the cluster (processing target cluster) written on the optical disc 2 is the last cluster in the free area.

  If it is determined in step S65 that the written cluster (processing target cluster) is the last cluster in the free area, the process proceeds to step S44 in FIG.

  On the other hand, if it is determined in step S65 that the written cluster (processing target cluster) is not the last cluster in the free area, the control unit 16 determines in step S66 the data to be written (in the present embodiment). It is determined whether or not all (one or more clip data) have been written.

  If it is determined in step S66 that all of the data to be written has been written, the process proceeds to step S44 in FIG.

  On the other hand, if it is determined in step S66 that all the data to be written has not been written yet, the control unit 16 sets the next adjacent cluster on the optical disc 2 as the cluster to be processed in step S67. (Update), the process returns to step S61, and the subsequent processes are repeated.

  In other words, in this case, the cluster to be processed is updated from the cluster 2-4 to the cluster 2-5 in FIG. 10 in the process of step S67, and the next data to be written in the process of step S61 is the top of the clip data. After it is determined that there is no cluster data 131-5, the cluster data 131-5 is written to the cluster 2-5 in step S63.

  In FIG. 10, a frame 32 indicates a frame surrounding the cluster to be processed. Also in FIG. 10 and subsequent drawings, the frame 32 indicates a frame surrounding the cluster to be processed.

  For example, suppose that the cluster 2-5 is a defective cluster due to scratches or the like, as indicated by a cross in the cluster 2-5 in FIG.

  In this case, the error determination unit 21 detects that the cluster 2-5 is a defective cluster by performing the error check described above, and notifies the control unit 16 of the detection result (error check result). .

  Then, the control unit 16 determines in step S64 that a write error has occurred, determines in step S68 that it is an internal factor error, and advances the process to step S69.

  Then, the control unit 16 controls the error determination unit 21 to predict another defect cluster (a range in which the defect cluster continues) in step S69, and in step S70, the next of the defect cluster (predicted range). The cluster data that has been written in the process of the previous step S63 is rewritten to the cluster (retry).

  For example, in this case, as shown in FIG. 11, in step S69, the control unit 16 determines that the defective cluster is a cluster 2-6 to 2-13 following the cluster 2-5 in addition to the cluster 2-5. It is estimated that there is a defect (the portion where the defect clusters are continuous is estimated to be in the range from clusters 2-5 to 2-13). In step S70, the control unit 16 sets the cluster to be processed as the cluster 2-14 next to the estimated defect cluster 2-13 (next to the range from the clusters 2-5 to 2-13). (Update) and write the cluster data 131-5 to the cluster 2-14 to be processed.

  Thereafter, the process returns to step S61, and the subsequent processes are repeated. That is, thereafter, each of the cluster data 131-6 to 131-10 following the cluster data 131-5 is written to each of the clusters 2-15 to 2-19 following the cluster 2-14, as shown in FIG. (However, if a write error does not occur after cluster 2-15).

  The retry process when an internal factor error among write errors has been described above. Next, a retry process when an external factor error among write errors occurs will be described.

  For example, as shown in FIG. 12, the cluster to be processed (cluster surrounded by the frame 32) is set (updated) from cluster 2-4 to cluster 2-5 in the process of step S67, and step S61 is performed. In step S63, it is determined that the next data to be written is not the head of the clip data, and then the cluster data 131-5 is written in the cluster 2-5 in step S63.

  However, this time, as shown in FIG. 12, although the cluster 2-5 is not a defective cluster (a normal cluster), external vibrations (such as viewed from the optical disc 2) such as vibration of the recording apparatus 1 occur. Suppose that a write error occurred due to a cause.

  In this case, the error determination unit 21 detects that an external factor error has occurred by performing the above-described error check, and notifies the control unit 16 of the detection result.

  Then, the control unit 16 determines in step S64 that a write error has occurred, determines in step S68 that it is not an internal factor error (that is, an external factor error), and proceeds to step S71. .

  In step S71, the control unit 16 controls the error determination unit 21 to set (update) the cluster to be processed as the next cluster other than the current class to be processed. The cluster data written in the immediately preceding step S63 is rewritten (retryed) in that cluster.

  For example, in this case, as shown in FIG. 13, in step S71, the control unit 16 sets (updates) the cluster to be processed as the cluster 2-6 next to the cluster 2-5 and updates the cluster data. 131-5 is written to the cluster 2-6 to be processed.

  Thereafter, the process returns to step S61, and the subsequent processes are repeated.

  At this time, if an external factor error continues (for example, if the recording apparatus 1 continues to vibrate), the cluster to be processed moves one by one as shown in FIG. Each time the data is moved, the cluster data 131-5 is sequentially rewritten to the cluster to be processed at that time (in the example of FIG. 13, any one of the clusters 2-6 to 2-9).

  Thereafter, when the occurrence of an external factor error disappears, the cluster data 131-5 is written into the cluster to be processed at that time (cluster 2-10 in the example of FIG. 13). Thereafter, as shown in FIG. 13, the cluster data 131-6 to 131-10 following the cluster data 131-5 are stored in the clusters 2-11 to 2-15 following the cluster 2-10, respectively. Each is written (recorded) (however, a write error does not occur in cluster 2-11 or later).

  As described above, in the present embodiment, when a write error occurs, a retry process is performed in consideration of the characteristics of the cause. That is, in the case of an internal factor, the defective cluster (including the predicted portion) is slipped (the cluster to be processed to be retried is moved), and the retry process is executed. Even in the case of an external factor, the clusters to be processed are slipped (moved) one by one until the occurrence of an error due to the external factor converges, and a retry process is executed.

  Since the recording apparatus 1 can execute the data writing process of the present embodiment (the process of the flowchart of FIG. 9), the following effects can be obtained. In other words, the problem that the method of retrying the same cluster as a processing target (especially a method often performed in the case of an external factor), which has been applied to a conventional recording apparatus, until the writing is successful, has been identified. This is an effect that can solve the problem that the abnormal consumption (consumption due to excessive writing) of the cluster (cluster in which retry is repeatedly performed until writing is successful) occurs. That is, this is an effect that the number of times of writing to the recording area of the recording medium (here, the optical disc 2) can be made uniform.

  Next, the data deletion processing in step S9 in FIG. 2 will be described with reference to the flowchart in FIG.

  Note that the processing of the flowchart of FIG. 14 is a processing example based on the following assumptions. That is, as a user who uses a video recorder (not shown), the unnecessary clip data of the clip data once recorded on the medium (here, the optical disc 2) is deleted to increase the capacity of the medium, and another clip data. There is a desire to record a new one. In order to meet such a demand, there is a function (hereinafter referred to as the last clip deletion function) for deleting the last clip data (the last recorded clip data) among the clip data recorded on the medium. Execution of this last clip deletion function is assumed in the data deletion processing of the flowchart of FIG. That is, it is assumed that the recording apparatus 1 has a last clip deletion function.

  Further, in the present embodiment, after such final clip data is deleted (corresponding to the data deletion process of FIG. 14, that is, after the process of step S9 of FIG. 2), the data recording of step S7 is performed. When the process is executed (when it is determined that there is no command to end editing in the process of step S10, and thereafter it is determined again that there is a request for data recording in the process of step S6), newly recorded clip data Is recorded in the area of the recording area of the optical disc 2 where the last clip data has been deleted. This is to guarantee real-time playback in a recorder that uses a medium such as the optical disc 2 that does not have a high access speed.

First, in step S81, the control unit 16 controls the drive 15, for example,
Data (clip data unit) designated by the operation by the operation unit 13 is deleted from the optical disc 2. In other words, in the present embodiment, the last clip data of one or more clip data recorded on the optical disc 2 is deleted.

  Here, the deletion includes not only that the data is actually deleted but also that the data is handled as deleted.

  Next, in step S82, the control unit 16 records in the storage unit 12 the area from which data has been deleted in step S81 (or the area from which data has been deleted) (or the area from which data has been deleted). It is determined whether the value is in the start position column 104, that is, whether it is ahead of the recording start position 104A. If it is determined that the position is ahead, the process proceeds to step S83.

  After one or more clip data is recorded on the optical disc 2 in the data recording process in step S7 in FIG. 2, it is determined in the process in step S8 that there is a data deletion request, and this data deletion process (process in step S9). Is basically executed, the value in the recording start position column 104 of the storage unit 12 (that is, the recording start position 104A) is the final clip data write end position (the final clip data in the process of step S43). Is the position of the place where the is written).

  In such a case, when the last clip data is deleted in the process of step S81, it is naturally determined in step S82 that the area ahead of the recording start position has been deleted, and the process proceeds to step S83.

  In step S83, the control unit 16 increments the write count in the write count column 103 of the storage unit 12 by 1, and in step S84, the value in the record start position column 104 (that is, the record start position 104A) is changed. Return to the top position (position 00000) of the optical disc 2 (recording area).

  As described above, in the present embodiment, after the last clip data is deleted and the other steps S82 to S89 described later are executed in the process of step S81, the process of step S7 in FIG. When the data recording process is executed (when it is determined that there is no command to end editing in the process of step S10, and after that, it is determined that there is a request for data recording in the process of step S6), the next newly recorded Is recorded in the area where the final clip data is deleted in the process of step S81. That is, as the number of repetitions of such deletion and re-recording increases in actual use, only the specific position (here, the area where the last clip data is recorded) is the guaranteed number of times of writing on the optical disc 2 (described above). As described above, for example, it is conceivable that the upper limit of about 1000 times will be reached first.

  Therefore, the number of times of recording at the most recorded (written) positions (here, corresponding to the value in the number of times of writing field 103) is counted, and a warning can be issued when the guaranteed range is exceeded. In the present embodiment, the processes of steps S82 to S84 are provided as the main processes of the data deletion process of FIG.

  Next, in step S85, the control unit 16 determines the area from which the data has been deleted (in this case, the area from which the final clip data has been deleted and becomes an empty area), and the subsequent empty areas. Is registered in the next queue 102. At this time, the free area information set in the next queue 102 is sorted in the order of the area head position.

  In step S86, the control unit 16 determines whether or not an adjacent empty area is registered in the next queue 102. If it is determined that such an empty area is registered, the process proceeds to step S87. Proceed and integrate those area information.

  If it is determined in step S86 that no adjacent empty area is registered, or if area information is integrated in step S87, the process proceeds to step S88.

  In step S88, the control unit 16 determines whether or not the instructed number of times (the number of instructed clip data) has been deleted.

  For example, if the clip data for which deletion is instructed is the last clip data described above, deletion is performed for the specified number of times (the number of specified clip data, that is, one) in step S88. In step S89, the control unit 16 moves the free area registered in the next queue 102 to the current queue 101. As a result, the next queue 102 becomes empty. Thereafter, the process proceeds to step S10 in FIG.

  In addition to the last clip data deletion function described above, there is also a function (hereinafter referred to as a continuous deletion function) that continuously deletes clip data before the last clip data (as an extension of the function). . When the recording apparatus 1 has this continuous deletion function and executes it (for example, when deleting two clip data), in step S88, the specified number of times (the number of specified clip data). Is deleted, and the process returns to step S81 to delete the clip data existing at a position different from the last clip data described above (here, the forward position), and thereafter Processing is executed.

  That is, at the time after the processing of step S81 (after another clip data is deleted), the recording start position 104A is returned to the head position (position 00000) of the optical disc 2 as described above. Therefore, as a matter of course, in step S82, it is determined that the area ahead of the recording start position has not been deleted, and the processing of steps S83 and S84 is not executed (skipped), and the processing proceeds to step S85. The subsequent processing is repeated. That is, the number of writing times is not counted up.

  Thereafter, for example, even if clip data existing at another position (further forward position) is deleted (the process of step S81 is executed), the recording start position 104A is on the optical disc 2 (in the recording area). Since it is held at the head position (position 00000), naturally, in step S82, it is determined that the area ahead of the recording start position has not been deleted, and the processing in steps S83 and S84 is not executed (skip). The process proceeds to step S85, and the subsequent processes are repeated. That is, the number of writing times is not counted up.

  Thus, in this embodiment, after the last clip data is deleted and the number of times of writing is counted up (after being incremented by 1), when another clip data is deleted, the number of times of writing is counted. The method of not performing (up-keeping as it is) is applied for the following reason.

  That is, for example, it is assumed that there is a method for counting up the number of times of writing (the value of the number of times of writing 103) every time clip data is deleted. In this method, the last clip data described above is deleted, and accordingly the number of writes (the value in the write count column 103) is counted up (after incrementing by 1), and then clip data existing at another position is deleted. If it is deleted, it will be counted up further. This count-up is clearly an excessive count-up. In other words, with such a technique, a warning is issued only after (worst) clip data is deleted 1000 times.

  Therefore, a method for appropriately counting up the number of times of writing in consideration of the recording position (area on the optical disc 2) of clip data to be deleted is required. For example, as such a method, the number of times of writing is managed not in units of areas (large areas) in which clip data is recorded as in this embodiment, but in units of the above-described clusters (small areas). It is also possible to consider the method of However, considering the complexity of software management and the lack of established information storage methods on media, such a method is not practical.

  For this reason, a simple method of counting up the number of times of writing is required, and in the present embodiment, the above-described processing (method) is applied as an example of such a method. That is, a simple write number technique that does not wastefully count up the number of times of writing when deleting clip data recorded at a position (on the optical disc 2) different from the final clip data, such as a continuous deletion function. As an example, the above-described processing (method) is applied.

  Next, the data recording process (step S7 (FIG. 8) in FIG. 2) and the data deletion process (step S9 (FIG. 14)) will be described again based on a specific example.

  First, it is assumed that clip data 201 having a size of 4000 as shown in the lower part of FIG. 15 is recorded on the optical disc 2 having a free area as shown in FIG. As described above, in the present embodiment, the clip data 201 includes the header 201A and actual data (AV data or the like) 201B.

  In this case, the storage unit 12 stores the current queue 101, the next queue 102, the write count column 103, and the recording start position column 104 as shown in FIG. In step S41, a determination of YES is made, and the process proceeds to step S42, in which the free area registered in the current queue 101 is located at the forefront of the address (set in the recording start position column 104 at that time). The empty area A that is close to the recording start position 104A is determined as an area in which data is written. In step S43, as shown in FIG. 9, clip data 201 having a size of 4000 is written from the beginning (position 01000) of the empty area A. At this time, as shown in FIG. 15 (FIG. 6), since the value in the write count column 103 is “1”, “1” is embedded in the header 201A in step S62 of FIG. The clip data 201 is written from the beginning of the empty area A. In step S44, as shown in FIG. 16, the area information of the empty area A in which the clip data 201 having the size of 4000 is written is changed to “area start position = 05000, size = 3000”. The empty area A whose area information has been changed in this way is referred to as an empty area A ′.

  In step S45, since all the clip data 201 having a size of 4000 to be recorded has been written in the empty area A, a determination of YES is made and the process proceeds to step S46. In step S46, after the value in the recording start position column 104 (that is, the recording start position 104A) is changed to the value 05000 as shown in FIG. 16, the process proceeds to step S8 in FIG.

  Subsequently, it is assumed that clip data 202 having a size of 7000 as shown in FIG. As shown in FIG. 18, this clip data 202 is also composed of a header 202A and actual data 202B.

  In this case, NO is determined in step S8 of FIG. 2, and further NO is determined in step S10. Thereafter, YES is determined in step S6, and the data recording process in step S7 is executed again. .

  That is, in step S41 of FIG. 8, since the free areas A ′ to D are registered in the current queue 101 (FIG. 16), a determination of YES is made, and the process proceeds to step S42, where the free area A ′ contains data. The area to be written is determined. In step S43, the data of size 3000 out of the size 7000 of clip data 202 is written into the empty area A ′. At this time, as shown in FIG. 18 (FIG. 16), since the value in the write count column 103 is “1”, “1” is embedded in the header 202A in step S62 of FIG. , Clip data 202 (data of which size is 3000) is written in the empty area A ′. Then, in step S44, as shown in FIG. 17, the area information of the empty area A ′ in which the data of size 3000 is written is deleted from the current queue 101.

  In step S45, it is determined that the data to be recorded still remains (the data of the size 4000 of the clip data 202 still remains), and the process proceeds to step S42 again via step S41.

  In step S42, the free area B (FIG. 15) is determined as an area in which data is written, and in step S43, the remaining 4000 data of the clip data 202 is as shown in FIG. Are written from the beginning (position 10000) of the empty area B. Then, in step S44, as shown in FIG. 19, the area information of the empty area B in which the data of size 4000 is written is changed to “area head position = 14000, size = 5000”. The empty area B whose area information has been changed in this way is referred to as an empty area B ′.

  In step S45, it is determined that all of the clip data 202 having a size of 7000 to be recorded has been recorded, and the process proceeds to step S46. After the value in the recording start position column 104 is changed to the value 14000 as shown in FIG. 19 in step S46 (after the recording start position 104A is changed to the position 14000 as shown in FIG. 18), The process proceeds to step S8 in FIG.

  Subsequently, clip data 203 having a size of 4000 as shown in FIG. 20 described later is recorded. As shown in FIG. 20, the clip data 203 is also composed of a header 203A and actual data 203B.

  In this case, NO is determined in step S8 of FIG. 2, and further NO is determined in step S10. Thereafter, YES is determined in step S6, and the data recording process in step S7 is executed again. .

  That is, in step S41 of FIG. 8, since the free areas B ′ to D are registered in the current queue 101 (FIG. 19), a determination of YES is made and the process proceeds to step S42, where the free area B ′ contains data. The area to be written is determined. In step S43, as shown in FIG. 20, clip data 203 having a size of 4000 is written from the beginning (position 14000) of the empty area B ′. At this time, as shown in FIG. 20 (FIG. 19), since the value in the write count column 103 is “1”, “1” is embedded in the header 203A in step S62 of FIG. The clip data 203 is written from the beginning of the empty area B ′. In step S44, as shown in FIG. 21, the area information of the empty area B ′ in which the clip data 203 having the size 4000 is written is changed to “area head position = 18000, size = 1000”. The empty area B ′ whose area information has been changed in this way is referred to as an empty area B ″.

  In step S45, since all the clip data 203 having a size of 4000 to be recorded has been written in the empty area B ', YES is determined, and the process proceeds to step S46. After the value in the recording start position column 104 is changed to the value 18000 as shown in FIG. 21 (after the recording start position 104A is changed to the position 18000 as shown in FIG. 20) in step S46, The process proceeds to step S8 in FIG.

  Next, as shown in FIG. 20, from the optical disc 2 in which the clip data 201 to 203 are recorded, the final clip data 203 and the clip data 202 positioned in front of the clip data 203 are used by using the above-described continuous deletion function. Shall be deleted in succession. At this time, the storage unit 12 stores a current queue 101, a next queue 102, a write count column 103, and a recording start position column 104 as shown in FIG.

  In this case, in step S81 of FIG. 14, the clip data 203 having a size of 4000 is deleted from the position 18000 as shown in FIG. In step S82, the area from which data has been deleted (empty area E) is in front of the value (recording start position 18000) in the recording start position column 104 (not shown), so a YES determination is made. Proceed to S83.

  As shown in FIGS. 22 and 23, in the process of step S83, the value in the write count column 103 is incremented by 1 to “2”, and in the process of step S84, the value in the record start position column 104 (FIG. 22 recording start position 104A) is returned to the top position (position 00000) of the optical disc 2 (recording area).

  In this way, when the last clip data 203 is deleted (when the clip data 203 to be deleted first in the continuous erasure function is deleted), the number of times of writing is counted up. Furthermore, when clip data at another position (in this case, clip data 202) is deleted at a later time, the recording start position 104A is set to the optical disc 2 so that the writing count is not wasted. It is returned to the head position (in the recording area).

  In step S85, as shown in FIG. 23, the empty area E from which the final clip data 203 has been deleted and the empty areas B ″, C, and D, which are the subsequent areas, are stored in the next queue 102. be registered.

  As shown in FIG. 22, since the empty area E and the empty area B ″ are adjacent to each other, a determination of YES is made in step S86, and in step S87, as shown in FIG. The free area B ″ is integrated into a free area F. In response to this, as shown in FIG. 25, the registered content of the next queue 102 is also updated. That is, the registration of the empty area E and the empty area B ″ is deleted, and the empty area F is newly registered (the area information “area head position = 14000, size = 5000” of the empty area F is the empty area F Set in the field above the C area information).

  Thereafter, NO is determined in step S88, and the process returns to step S81. This time, data deletion processing is performed on the clip data 202 immediately before the last clip data 203.

  That is, in step S81, as shown in FIG. 26, the clip data 202 having a size of 7000 is deleted from the position 14000. In step S82, the area from which data has been deleted (empty area G and empty area H) is behind (not in front of) the value in the field 104 of recording start position (position 00000 of recording start position 104A). And the process proceeds to step S85.

  That is, as shown in FIGS. 26 and 27, this time, the processing in steps S83 and S84 is not executed (skipped), and the value in the write count column 103 is kept “2”. The value in the recording start position column 104 (recording start position 104A in FIG. 26) is also held at the head position (in the recording area) of the optical disc 2 (position 00000).

  In this way, even if clip data (in this case, clip data 202) existing at a position different from the clip data 203 to be deleted first in the continuous erasure function is deleted, the number of times of writing is wasted. Not performed (the number of writes is retained). Furthermore, when clip data at another position is deleted at a later time (in this case, no further deletion is specified, but, for example, when clip data 201 is further deleted), the number of times of writing Thus, the recording start position 104A is held at the head position (in the recording area) of the optical disc 2 so that the unnecessary count-up is not performed.

  In step S85, as shown in FIG. 27, empty areas H and G from which the clip data 202 has been deleted and empty areas F, C, and D, which are areas after that, are registered in the next queue 102. . That is, in the next queue 102, the setting of the area information of the empty areas F, C, and D is held, and the area information “area head position = 5000, large” is stored in each of the two columns above the empty area F. And the area information “area head position = 10000, size = 4000” of the empty area G are set.

  As shown in FIG. 26, since the empty area G and the empty area F are adjacent to each other, YES is determined in step S86, and in step S87, as shown in FIG. The area F is integrated into a free area I. Accordingly, as shown in FIG. 29, the registered contents of the next queue 102 are also updated. In other words, the registration of the empty area G and the empty area F is deleted, and the empty area I is newly registered (the area information “area head position = 10000, size = 9000” of the empty area I is stored in the empty area H Are set in a column between the area information and the area information of the empty area C).

  In this case, as described above, the clip data designated to be deleted by the continuous deletion function is the clip data 202 and the clip data 203, and since all of these are deleted, YES is determined in step S88. In step S89, as shown in FIG. 30, the free areas H, I, C, and D registered in the next queue 102 are moved to the current queue 101, and the next queue 102 becomes empty as a result. Thereafter, the process proceeds to step S10 in FIG.

  Subsequently, it is assumed that clip data 210 having a size of 7000 as shown in FIG. 31 (the above-described clip data 202 may be the same or different from that) may be recorded. As shown in FIG. 31, this clip data 210 is also composed of a header 210A and actual data 210B.

  In this case, NO is determined in step S10 in FIG. 2, and thereafter, YES is determined in step S6, and the data recording process in step S7 is executed again.

  That is, in step S41 of FIG. 8, since empty areas H, I, C, and D are registered in the current queue 101 (FIG. 30), a determination of YES is made, and the process proceeds to step S42, where the empty area H is It is determined as an area where data is written. In step S 43, the data of size 3000 out of the clip data 210 of size 7000 is written in the empty area H. At this time, as shown in FIG. 31 (FIG. 30), the value in the number-of-writes column 103 has been incremented to “2”, so “2” is embedded in the header 210A in step S62 of FIG. After that, the clip data 210 (data of which size is 3000) is written in the empty area H. In step S44, although not shown, the area information of the empty area H in which the data of size 3000 is written is deleted from the current queue 101.

  By the way, as can be easily understood by comparing FIG. 28 and FIG. 15, the empty area H (FIG. 28) at the positions 05000 to 8000 and the empty area A ′ (FIG. 15) are the same area. At this time, the clip data 210 is recorded in the area after the clip data 202 is recorded and deleted as described above. That is, in the region from position 05000 to position 8000, writing has been performed twice.

  On the other hand, as shown in FIG. 31, only the clip data 201 is currently recorded in the area from position 1000 to position 5000, that is, the area where the clip data 201 is recorded. That is, in the area from position 1000 to position 5000, one writing has been performed.

  In this way, the difference in the number of times of writing occurs depending on the area of the optical disc 2, but the recording unit 1 executes the series of processes described above, so that the maximum number of times of writing (in this case, “2”). Can be appropriately held (reflected) as the value of the write count column 103 of the storage unit 12.

  Further, when it is determined in step S10 in FIG. 2 that there has been an instruction to end editing, the recording apparatus 1 includes the value in the write count column 103 in the free area rewrite management data and stores a predetermined area on the optical disc 2. (Any area may be used, but for example, a specific area other than the recording area is preferable so that it is not erased by mistake). The number of times of writing) can be reliably managed. That is, it is possible to reliably issue a warning when the number of times of recording at the most recorded positions exceeds the guaranteed range.

  Next, the formatting process (step S5 in FIG. 2 (FIG. 7)) will be described again based on a specific example.

  For example, assume that clip data 301 to 303 as shown in FIG. 32 are continuously recorded in that order from the head position (in the recording area) of the optical disc 2.

  Note that the clip data 301 includes a header 301A and actual data 301B. Also, the value “1” described in the header 301A indicates the number of times of writing described above. That is, the maximum number of times of writing in the area where the clip data 301 is recorded in the recording area of the optical disc 2 is “1”.

  Similarly, the clip data 302 is composed of a header 302A and actual data 302B. Also, the value “1” described in the header 302A indicates the number of times of writing described above. That is, the maximum number of times of writing in the area where the clip data 302 is recorded in the recording area of the optical disc 2 is “1”.

  Similarly, the clip data 303 includes a header 303A and actual data 303B. Also, the value “1” described in the header 303A indicates the number of times of writing described above. That is, the maximum number of times of writing to the area where the clip data 303 is recorded in the recording area of the optical disc 2 is “1”.

  Also, as shown in FIG. 32, “1” is also set in the write count column 103 of the storage unit 2, and the write start position 104 A (the value in the write start position column 104) is the end of the clip data 303. As a result, after the last clip data 203 is recorded on the optical disc 2 (after being written in the corresponding area for the first time), the above-described deletion of the clip data has not yet been performed. This shows that the editing process has been finished once (for example, removed from the recording apparatus 1), the editing process has been executed again, and the processes from steps S1 to S3 have been executed.

  In this case, if YES is determined in step S4 in FIG. 2, the formatting process in step S5 in FIG. 2 is executed. That is, in step S31 of FIG. 7, as shown in FIG. 33, all of the clip data 301 to 303 recorded on the optical disc 2 are deleted.

  However, as described above, in this embodiment, the empty area rewrite management data is retained without being deleted even if the optical disk 2 is formatted.

  Next, as shown in FIG. 33, in step S32, the write count in the write count column 103 is incremented by 1, so that “2” is set, and in step S34, the recording start position 104A ( The value of the recording start position column 104) is returned to the head position (in the recording area) of the optical disc 2.

  Next, although not shown in the drawing, in step S34, the area information of all the empty areas existing in the optical disc 2 at that time (at the time after formatting) in the current queue 101 of the storage unit 12 (in this example, empty space). The area start position and size of the area are registered in the order of the position on the address of the empty area, and the next queue 102 of the recording unit 12 becomes empty in step S35.

  Thereafter, the processing proceeds to step S6 in FIG.

  Subsequently, it is assumed that there is a request for recording clip data 304 having the same size as clip data 301 (may be clip data 301 itself or data different therefrom).

  In this case, a detailed description of the processing is repeated and will be omitted. However, YES is determined in step S6, and in the data recording processing in step S7, as shown in FIG. Since “2” is embedded in the header 304A (because the value is counted up to “2”), the clip data 304 is recorded in the area where the clip data 301 was recorded. Then, the recording start position 104A (the value in the recording start position column 104) is moved to the end of the area where the clip data 304 is recorded.

  Thus, even when formatting is performed, the value (number of times of writing) in the number-of-writes column 103 is counted up, so in the next recording process, the number of times of writing on the optical disc 2 (the maximum number of times of writing in that area). ) Can be reliably managed.

  That is, if the number of times of writing is not updated at the time of formatting as in the prior art, the area where the clip data 304 is recorded in the next recording process is the nth recording (n is an integer value of 2 or more). Nevertheless, an erroneous determination is made that the recording is the (n-1) th recording, and the number of recordings at the most recorded position cannot be accurately maintained. As a result, even when the number of times of recording at the most frequently recorded positions actually exceeds the guaranteed range, the value in the number-of-writes column 103 (the number of times of writing) is within the guaranteed range, and a warning is issued. Becomes impossible.

  On the other hand, in the present embodiment, as described above, even when formatting is performed, the value in the number-of-writes column 103 (number of times of writing) is reliably counted up. It becomes possible to hold the number of recordings accurately. As a result, when the number of times of recording at the most recorded positions actually exceeds the guaranteed range, the value in the write count column 103 (number of times of writing) also exceeds the guaranteed range, and a warning is reliably issued. It becomes possible.

  By the way, the data recording apparatus 1 of the present embodiment holds, for example, the clip data recorded on the optical disc 2 in the process of step S7 in FIG. 2 in the storage unit 12 for backup at least until the editing process is completed. Can be stored (stored). Alternatively, clip data may be held in a recording device different from the data recording device 1 for backup.

  As a result, for example, even if a trouble such as an unexpected power interruption occurs during the data recording process and the clip data being recorded on the optical disc 2 at that time is lost (it can be recorded only halfway and considered to be deleted). In the next editing process (for example, when the recording apparatus 1 is turned on next time), the clip data for backup stored in the storage unit 12 or another recording apparatus is used to record the optical disk. 2 can be stored (restored) again at the same position on the screen.

  Such a technique (technique) is called salvage and is also applied to a conventional recording apparatus. However, in the conventional recording device, the presence of clip data to be restored is detected from the internal clip (corresponding to the storage unit 12 of the present embodiment) or backup clip data held in another recording device. There was a problem that it was difficult to identify.

  Specifically, for example, when a conventional recording device breaks down while recording clip data on the optical disc, the user forcibly removes the optical disc from the conventional recording device and puts it in another device. In some cases, it is attempted to restore the clip data by using another device. In such a case, the content of the internal memory (nonvolatile memory) of the conventional recording device used for recording cannot be used by another device, so there is clip data to be restored only from the removed optical disk. It is necessary to execute the process to confirm. However, with conventional salvage, it has been virtually impossible to perform such processing.

  Therefore, in the present embodiment, as described above, including the purpose of solving such a problem, the header portion of the clip data (even if it is not the header portion, the region on the optical disc 2 associated with the clip data may be used. Is embedded (included) in the number of times of writing when the clip data is written (the value set at that point in the number of times of writing 103 of the storage unit 12). .

  That is, the control unit 16 in FIG. 1 deletes after recording in the area next to the last clip data among the clip data normally recorded on the optical disc 2 after the start processing in step S1 in FIG. The number of times of writing included in the header portion of the clip data that has been recorded (or the data recording process was interrupted while part of the data was recorded in the area and was considered to be deleted) is recognized. The number of times of writing may be left in the area where the clip data of the optical disk 2 is deleted (considered to be deleted) or may be held in another location such as the storage unit 12 of the recording apparatus 1. Sometimes.

  Then, the control unit 16 compares the number of times of writing included in the header portion of the deleted clip data recognized as described above with the current value in the number of times of writing 103 of the storage unit 12, and Based on the comparison result, in step S2, it is determined whether there is data to be restored.

  The process of step S2 will be described again with a specific example.

  For example, now, the clip data 301 to 303 shown in FIG. 32 described above exist, and each of the clip data 301 to 303 is arranged in the order from the head position (recording area) of the optical disc 2 as in FIG. Suppose you are trying to record continuously.

  At this time, as shown in FIG. 35, the recording apparatus 1 normally records the clip data 301 and the clip data 302 on the optical disc 2 and the unexpected power supply while the clip data 303 is recorded on the optical disc 2. It is assumed that the process ends abnormally due to disconnection, and then the power is turned on again, the editing process is started again, and the starting process of step S1 in FIG. 2 is ended.

  In this case, as shown in FIG. 35, “1” is set in the value of the write count column 103 of the storage unit 12 of the recording device 1 (in the immediately preceding step S29 (FIG. 3), This is because the value “1” indicated in the empty area rewrite management data of the optical disc 2 is already set in the write count column 103).

  On the other hand, as shown in FIG. 35, in the data recording process of step S7 of FIG. 2 before abnormal termination, the header 303A of the clip data 303 includes “1” as the number of times of writing, and the clip data 303 Was recorded on the optical disc 2.

  Hereinafter, the storage unit 12 stores information specifying clip data being written (or last written) (in this case, clip data 303), and the number of writes to be included in the header (current In this case, “1”) is held (stored).

  Therefore, the control unit 16 refers to such information in the storage unit 12 and the clip data recorded after the (last) clip data 302 normally recorded on the optical disc 2 is the clip data 303. In other words, the clip data 303 is recognized as a candidate of data to be restored, and the write count “1” included in the header 303A is acquired from the storage unit 12. The control unit 16 then obtains the number of times of writing “1” (the value described in the header 303A of the candidate data to be restored on the optical disc 2) and the current value of the number of times of writing 103 in the storage unit 12. And compare. In this case, since the value in the write count column 103 of the storage unit 12 is also “1”, the comparison results match, and in such a case, the control unit 16 has data to be restored in step S2. In step S3, the data is restored. Specifically, in step S3, the control unit 16 reads out data candidates to be restored, that is, backup clip data 303 from the storage unit 12, and reads the corresponding area of the optical disc 2 (in the example of FIG. The area is recorded again in the area following 302.

  At this time, at least a part (particularly the first half) of the clip data 303 may be written twice in the same area of the optical disc 2. Therefore, in such a case, although not shown, the control unit 16 may increment the value in the write count column 103 of the storage unit 12 by one. That is, in this case, the control unit 16 may set the value of the write count column 103 of the storage unit 12 to “2” and embed “2” as the write count in the header portion 303A of the clip data 303.

  On the other hand, for example, the clip data 301 to 303 shown in FIG. 32 described above exist, and the recording apparatus 1 performs the clip data in the data recording process in step S7 in FIG. Each of 301 to 303 is continuously recorded (normally recorded) in that order from the head position (recording area) of the optical disc 2, and then the final clip data 303 (normally recorded) is processed in step S9. Suppose that the clip data 303) is being deleted and that the process is abnormally terminated due to an unexpected power cut, and then the power is turned on again to complete the startup process in step S1 in FIG.

  In this case, as shown in FIG. 35, “2” is set in the value of the write count column 103 of the storage unit 12 of the recording apparatus 1 (in the immediately preceding step S83 (FIG. 3), the write is performed). This is because the value in the number-of-times column 103 is counted up and updated to “2”).

  On the other hand, as shown in FIG. 35, in the header 303A of the clip data 303 that has been deleted (or in the middle) by the data deletion processing in step S9 of FIG. 1 ”is included, and this value remains“ 1 ”and is not particularly updated.

  Since clip data 303 stored last at the time of abnormal termination is the clip data 303, as described above, the information specifying the clip data 303 and the write to be included in the header thereof are stored in the storage unit 12. The number of times (in this case, “1”) is held (stored).

  Therefore, the control unit 16 refers to such information in the storage unit 12, and the clip data recorded after the (final) clip data 302 currently recorded on the optical disc 2 is the clip data 303. In other words, the clip data 303 is recognized as a candidate of data to be restored, and the write count “1” included in the header 303A is acquired from the storage unit 12.

  The control unit 16 then obtains the number of times of writing “1” (the value described in the header 303A of the candidate data to be restored on the optical disc 2) and the current value of the number of times of writing 103 in the storage unit 12. And compare. In this case, since the value in the write count column 103 of the storage unit 12 is “2”, the comparison result is different. In such a case, the control unit 16 determines the data to be restored in step S2. Does not exist (does not exist), and the process of step S3 is performed without executing the process of step S3, that is, without restoring the data candidates to be restored (here, the clip data 303 for backup). Proceed to

  As described above, the control unit 16 recognizes the clip data candidates to be restored to the optical disc 2, and the value (value indicating the number of times of writing) described in the header of the candidate and the number of times of writing 103 in the storage unit 12. Are compared with the current value of the current data, and based on the comparison result, it is determined in step S2 whether there is data to be restored. That is, in the case of the comparison result that the values are the same, it is determined in step S2 that there is data to be restored, and after the data is restored in step S3, the process proceeds to step S4. On the other hand, in the case of the comparison result that the values are different, it is determined in step S2 that there is no data to be restored, and the process of step S3 is not executed (data is not restored). Advances to step S4.

  As described above, when the last clip data is deleted, the value in the write count column 103 is updated in the previous step S83 (FIG. 3), and in the write start position column 104 in step S84. (Write start position 104A) is also returned to the head position (in the recording area) of the optical disc 2. Therefore, if the process ends abnormally during the data deletion process of step S9 in FIG. 2 and then the editing process is started again, the value in the write start position column 104 (write start position 104A) at the time of step S2. Is the head position (of the recording area) of the optical disc 2.

  On the other hand, if the data recording process is abnormally terminated during the data recording process in step S7 in FIG. 2 and then the editing process is started again, the value in the write start position column 104 (the write start position) The position 104A) is the end position of the clip data immediately before the clip data that failed to be written (that is, the clip data to be restored).

  Therefore, when determining whether or not there is data to be restored in step S2, the control unit 12 may use the value in the write start position column 104 (write start position 104A) (use alone). Or may be used in combination with the number of times of writing).

  Further, as described above, the processes in steps S2 and S3 may be performed by another apparatus (not shown) different from the recording apparatus 1.

  However, in this case, before the process of step S2, the other apparatus, the value of the write count column 103 of the storage unit 12 of the recording apparatus 1, the information specifying the clip data candidates to be restored, and It is necessary to acquire various information such as the number of times of writing included in the header portion of the clip data.

  This acquisition method is not particularly limited. For example, another apparatus and the recording apparatus 1 communicate with each other (a communication unit and a network intervening in the communication are not illustrated), and steps S83 and 18 in FIG. At the end of each processing of step S47 and step S32 of FIG. 7, that is, when the value of the write count column 103 is updated (when incremented by 1), the updated value, You may apply the method of transferring the information which shows the processing state of the data recording process of step S7 from the recording device 1 to another apparatus.

  Alternatively, for example, at the end of each of the processes in step S83 in FIG. 14, step S47 in FIG. 18, and step S32 in FIG. 7, that is, when the value in the write count column 103 is updated (increment by 1). The updated value is recorded in the free space rewriting management data of the optical disc 2 (the free space rewriting management data is updated), and when recording of new clip data is started, A method of recording the clip data information in the free area rewrite management data of the optical disc 2 (updating the free area rewrite management data) may be applied.

  The series of processes described above can be realized by hardware, but can also be realized by software. When a series of processing is realized by software, a program constituting the software is installed in a computer, and the program is executed by the computer, whereby the above-described recording apparatus 1 is functionally realized.

  FIG. 42 is a block diagram showing a configuration of an embodiment of a computer 501 functioning as the recording apparatus 1 as described above. An input / output interface 516 is connected to a CPU (Central Processing Unit) 511 via a bus 515, and the CPU 511 receives a command from an input unit 518 such as a keyboard and a mouse via the input / output interface 516. When input, it is stored in a recording medium such as a ROM (Read Only Memory) 512, a hard disk 514, or a magnetic disk 531, an optical disk 532, a magneto-optical disk 533, or a semiconductor memory 534 mounted in the drive 520. The program is loaded into a RAM (Random Access Memory) 513 and executed. Thereby, the various processes described above are performed. Further, the CPU 511 outputs the processing result to an output unit 517 such as an LCD (Liquid Crystal Display) via the input / output interface 516 as necessary. The program is stored in advance in the hard disk 514 or ROM 512 and provided to the user integrally with the computer 501 or as a package medium such as the magnetic disk 531, the optical disk 532, the magneto-optical disk 533, and the semiconductor memory 534. Or can be provided to the hard disk 514 via the communication unit 519 from a satellite, a network, or the like.

  In the present specification, the step of describing the program provided by the recording medium is not limited to the processing performed in chronological order according to the described order, but is not necessarily performed in chronological order. It also includes processes that are executed individually.

1 is a block diagram illustrating a configuration example of a recording apparatus to which the present invention is applied. 3 is a flowchart for explaining editing processing of the recording apparatus in FIG. 1. It is a flowchart which shows the detail of the process of step S1 of FIG. It is a figure which shows the memory content of the memory | storage part of FIG. It is a figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is a flowchart which shows the detail of a process of step S5 of FIG. It is a flowchart which shows the detail of a process of step S5 of FIG. It is a flowchart which shows the detail of a process of step S43 of FIG. It is a figure explaining the process of step S68 (YES) thru | or S69 of FIG. It is another figure explaining the process of step S68 (YES) thru | or S69 of FIG. It is a figure explaining the process of step S68 (NO) and S71 of FIG. It is another figure explaining the process of step S68 (NO) of FIG. 9, and S71. It is a flowchart which shows the detail of a process of step S9 of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. FIG. 7 is another diagram showing a data recording state of the optical disc in FIG. 1. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the memory content of the memory | storage part of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. FIG. 7 is another diagram showing a data recording state of the optical disc in FIG. 1. It is another figure which shows the recording state of the data of the optical disk of FIG. It is another figure which shows the recording state of the data of the optical disk of FIG. And FIG. 16 is a block diagram illustrating a configuration example of a personal computer.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Recording device, 2 Optical disk, 11 Input data processing part, 12 Storage part, 13 Operation part, 14 Display part, 15 Drive, 16 Control part, 21 Error judgment part, 101 Current queue, 102 Next cue, 103 Write number column , 104 Recording start position column, 104A Recording start position

Claims (6)

Writing means for sequentially writing input data in the order of arrangement in one or more empty areas arranged behind a preset recording start position in the recording area of the recording medium;
Of the input data written to the recording area by the writing means, deleting means for deleting the first input data written last,
If the first input data is deleted by the deleting means, as before type recording start position, set the start position of the recording area, as before SL write count of the input data to the recording area, the far and setting means to set a value obtained by adding 1 to the value which has been set as the number of writing
With
The writing unit is arranged at the first position behind the recording start position set by the setting unit among the one or more free areas after the first input data is deleted by the deleting unit. The next second input data is written in the empty area.
Record apparatus. The deletion means further deletes the first input data, and further writes third input data different from the first input data among the input data written in the recording area to the writing means. The second input data is deleted before being written to the recording medium by
If the third input data is deleted by the deleting means, before Ki設 constant unit holds the settings of the recording start position, to hold the setting of the write number
The recording apparatus according to 請 Motomeko 1. Further comprising formatting means for formatting the recording area;
If the recording region is formatted by the formatting means, before Ki設 constant means, as said recording start position, setting the starting position of the recording area, as the number of writing, is set as the write number until it Set the value obtained by adding 1 to the previous value
The recording apparatus according to 請 Motomeko 1. Each time the writing means writes the input data into the free space, the data indicating the current number of times of writing set by the setting means is included in the input data to be written and written into the free space.
The recording apparatus according to 請 Motomeko 1. A writing step of sequentially writing input data in the order of arrangement in one or more empty areas arranged behind a preset recording start position in a recording area of the recording medium;
A deletion step of deleting first input data written last among the input data written to the recording area by the processing of the writing step;
Said first input data deleted if the processing of the deleting step, as a pre-type recording start position, set the start position of the recording area, as before SL write count of the input data to the recording area, it and set the constant set to set the value obtained by adding 1 to the value was steps as the number of writes to
Including
In the writing step, after the first input data is deleted by the deleting unit, the first input data is arranged at the first of the one or more free areas behind the recording start position set by the setting unit. Writing the second input data to the empty area
Record method. A program for causing a computer to control recording of input data to a recording medium,
A writing step of sequentially writing the input data in the order of arrangement in one or more empty areas arranged behind a preset recording start position in the recording area of the recording medium;
A deletion step of deleting first input data written last among the input data written to the recording area by the processing of the writing step;
Said first input data deleted if the processing of the deleting step, as a pre-type recording start position, set the start position of the recording area, as before SL write count of the input data to the recording area, it and set the constant set to set the value obtained by adding 1 to the value was steps as the number of writes to
Including
In the writing step, after the first input data is deleted by the deleting unit, the first input data is arranged at the first of the one or more free areas behind the recording start position set by the setting unit. Writing the second input data to the empty area
Program.

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