JP2009277320A - Optical disk recording device, data recording method, and data recording program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record user data UD and parity data PD on an optical disk 100 in a short time. <P>SOLUTION: When the user data UD are recorded on the optical disk 100, a recording region R is divided into first to fourth recording regions R1-R4, the user data UD are successively recorded on the first to third recording regions R1-R3, the exclusive OR of the user data UD recorded on a corresponding sector SC is calculated to generate parity data, and parity addition recording is performed to record the parity data on a corresponding sector SC in the fourth recording region R4. In this case, first to third region data UD1-UD3 are recorded not only on the first to third recording regions R1-R3 in the optical disk 100, but also on a hard disk device 7, and the first to third region data UD1-UD3 are reproduced from the hard disk device 7 when calculating the parity data PD. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disc recording apparatus, a data recording method, and a data recording program, and is suitable for application to an optical disc apparatus, for example.

  2. Description of the Related Art Conventionally, in an optical disc apparatus, music data, user data UD, or a computer is used for an optical disc such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a BD (Blu-ray Disc, registered trademark). Various kinds of data that can be recorded and reproduced are widely used.

  In addition, in order to improve the recording speed and reproduction speed of information in the optical disk apparatus, that is, the data transfer speed and increase the redundancy, the same data as RAID (Redundant Arrays of Inexpensive Disks) configured with a plurality of hard disk drives for the optical disk. Has been proposed in which data is recorded and reproduced in a distributed manner (see, for example, Patent Document 1).

In this optical disc apparatus, each recording layer is handled in the same manner as one hard disk drive in RAID, and data and information signals with redundancy (hereinafter referred to as redundant data) are recorded and reproduced. Has been made.
JP 2004-342204 A (FIG. 10)

  By the way, in such an optical disc apparatus, it is desirable that data and redundant data can be recorded and reproduced in as short a time as possible. However, when recording redundant data by the RAID function, it is necessary to access distributed data and perform computation after reproduction to generate redundant data. To process in a short time, the optical disk must be accessed at high speed. Don't be. That is, in this optical disk apparatus, data is read while rotating the optical disk at a rotational speed that is significantly faster than the normal reproduction speed, and at a higher speed than a normal optical disk apparatus in order to access the data recorded in a distributed manner. The seek operation must be executed. However, in order to add a function related to the optical disc apparatus, there is a problem that the configuration of the optical disc apparatus has to be greatly changed.

  The present invention has been made in consideration of the above points, and an optical disc recording apparatus, a data recording method, and data recording capable of recording data and redundant data on an optical disc in a short time without greatly changing the configuration of the optical disc recording apparatus. It is intended to propose a program.

  In order to solve this problem, in the optical disk recording apparatus of the present invention, for an optical disk whose data is managed for each predetermined block, an optical disk apparatus for recording optical recording data to be recorded on the optical disk, and a recording area in the optical disk Is divided into a predetermined number of divided areas, a part of which is used as a data area, and a recording data allocation unit that allocates optical recording data to each divided area of the data area, and a divided area that is a data area, A redundant data calculation unit for calculating redundant data for restoring the recording data based on the recording data for each block corresponding to each other, and the redundancy corresponding to the block in the data area, with the divided area other than the data area as a redundant area Redundant data allocation unit that allocates redundant data to each block in the area, and larger than the data area Recording / reproducing apparatus having recording capacity and recording / reproducing data, optical disc apparatus and recording / reproducing apparatus to control recording of optical recording data in data area and recording / reproducing apparatus for at least part of optical recording data When the redundant data calculation unit calculates the redundant data, the optical recording data recorded in the recording / reproducing apparatus is reproduced, and the redundant data calculated based on the reproduced optical recording data is stored in the redundant area. The recording control unit for recording is provided.

  As a result, the optical recording data necessary for calculating the redundant data can be quickly reproduced, so that the time required to calculate the redundant data can be shortened.

  In the data recording method and the data recording program of the present invention, the recording area is divided into a predetermined number of divided areas on the optical disk whose data is managed for each predetermined block, and a part thereof is used as the data area. A recording data allocating step for allocating optical recording data to be recorded on the optical disc to each divided region of the data region, an optical disc recording step for recording the optical recording data on the optical disc, and recording / reproduction having a recording capacity larger than that of the data region A recording / reproducing apparatus recording step for recording at least a part of the optical recording data to the apparatus and a divided area which is a data area supplied based on the optical recording data reproduced from the recording / reproducing apparatus correspond to each other. Redundancy to calculate redundant data for restoring the recorded data from the recorded data for each block A data calculation step, a redundant data allocation step for assigning redundant data to a block in the redundant area corresponding to a block in the data area, and a redundant data for recording the redundant data on the optical disc. And a recording step.

  As a result, the optical recording data necessary for calculating the redundant data can be quickly reproduced, so that the time required to calculate the redundant data can be shortened.

  Further, in the optical disk recording apparatus of the present invention, for an optical disk whose data is managed for each predetermined block, an optical disk apparatus for recording optical recording data to be recorded on the optical disk, and a recording area divided into a predetermined number of divisions Divided into areas, a part of which is used as a data area, and a recording data allocating unit for assigning recording data to each divided area of the data area, and recording data for each block corresponding to each other between the divided areas designated as the data areas A redundant data calculation unit for calculating redundant data for restoring the recording data based on the data, and assigning the redundant data to the blocks in the redundant area corresponding to the blocks in the data area, with the divided areas other than the data area as redundant areas A redundant data allocation unit and a recording capacity larger than the data area, Recording / reproducing apparatus for recording and reproducing recording data, and reproducing the apparatus recording data recorded in the recording / reproducing apparatus in the idle time when the optical disk apparatus and the recording / reproducing apparatus are not operated, and supplying them to the redundant data calculating unit When the redundant data calculation unit calculates redundant data and records the redundant data on the recording / reproducing device, and records the device recording data as optical recording data, the device recording data and the redundant data are reproduced from the recording / reproducing device. And a recording control unit for recording on the optical disc.

  This eliminates the need to calculate redundant data from the optical recording data when recording the optical recording data and the redundant data on the optical disc.

  Further, in the data recording method and data recording program of the present invention, the recording area in the optical disk in which data is managed for each predetermined block is divided into a predetermined number of divided areas, and a part of the recording area is used as a data area. A recording data allocation step for allocating optical recording data to be recorded to each divided area of the data area, and a recording / reproducing apparatus having a recording capacity larger than that of the data area in an idle time when the optical disc apparatus and the recording / reproducing apparatus are not operating Redundant for reconstructing the recorded data based on the recorded data for each block between the divided areas which are the data areas by reproducing the recorded device recorded data and supplying it to the redundant data calculation unit And the redundant data for recording the redundant data on the recording / reproducing apparatus. A recording step, a data allocation step for assigning redundant data to blocks in the redundant area corresponding to the blocks in the data area, and recording the apparatus recording data on the optical disc as optical recording data At this time, an optical recording step for reproducing apparatus recording data and redundant data from the recording / reproducing apparatus and recording the data on the optical disc is provided.

  This eliminates the need to calculate redundant data from the optical recording data when recording the optical recording data and the redundant data on the optical disc.

  According to the present invention, since the optical recording data necessary for calculating the redundant data can be quickly reproduced, the time required to calculate the redundant data can be shortened. Thus, the data and the redundant information can be shortened in a short time. Can be recorded on an optical disc, a data recording method and a data recording program can be realized.

  According to the present invention, when recording optical recording data and redundant data on an optical disc, it is not necessary to calculate redundant data from the optical recording data, and thus data and data can be recorded in a short time without greatly changing the configuration of the optical disc recording apparatus. An optical disc recording apparatus, a data recording method, and a data recording program capable of recording redundant information on an optical disc can be realized.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Configuration of Hard Disk Recorder In FIG. 1, reference numeral 1 denotes a hard disk recorder as a whole, which records imaging data as video content input from a video camera (not shown), A television broadcast program of terrestrial digital broadcasting can be received and recorded.

  In this hard disk recorder 1, a system controller 2 comprising a CPU (Central Processing Unit), a ROM (Read Only Memory) and a RAM (Random Access Memory) (not shown) controls the entire hard disk recorder 1 in an integrated manner. ing. The system controller 2 develops a basic program and a safe recording program stored in the ROM or the hard disk drive 4 in the RAM, and executes various processes and a parity addition recording process to be described later based on these programs. Has been made.

  When various requests are made by the user by operating the external remote controller 8, the hard disk recorder 1 acquires an operation signal generated by the remote controller 8 via the remote controller interface 9 and sends it to the system controller 2. It is made to supply.

  For example, when an operation signal indicating a recording request for recording a currently broadcast television broadcast program is supplied from the remote controller interface 9, the system controller 2 receives the currently broadcast television broadcast program and A television broadcast program recording process is executed.

  Specifically, the system controller 2 supplies an HD recording command for recording a television broadcast program to a hard disk medium (hereinafter referred to as HD medium) in the hard disk device 7 to the recording / reproducing block 6 and selects the selected frequency. The digital broadcast signal of the band is selected and received by the tuner 3, and the digital broadcast signal is supplied to the image processing unit 4 and the recording / reproducing block 6 as user data UD.

  The image processing unit 4 generates image data and audio data (hereinafter collectively referred to as image audio data) by executing decoding processing, demultiplexing processing, and the like on the user data UD, and displays them. This is supplied to the control unit 5.

  The display control unit 5 generates an image output signal and an audio output signal based on the image audio data and supplies them to a display device (not shown), thereby causing the display device to display an image based on the image data and based on the audio data. It is designed to output audio.

  When the HD recording command and the user data UD are supplied, the recording / reproducing block 6 generates an HD recording address where the user data UD is to be recorded, and the HD recording address together with the user data UD and the information recording command. By supplying the data to the hard disk device 7, the user data UD is recorded on the HD medium by the hard disk device 7.

  When the system controller 2 is supplied with an operation signal from the remote controller interface 9 indicating a recording request for recording the imaging data of a video camera (not shown) connected to the external interface 11 on the optical disc 100, the system controller 2 A process for recording the user data UD onto the optical disc 100 is executed.

  That is, when image data is input from a video camera (not shown) via the external interface 11, the system controller 2 supplies the image data to the recording / reproducing block 6 as user data UD together with an optical disc information command.

  The recording / reproducing block 6 records the user data UD on the optical disc 100 by generating an optical disc recording address for the user data UD and supplying the information recording command, the user data UD and the optical disc recording address to the optical disc apparatus 10. It is made to let you.

  Further, when an operation signal indicating a reproduction request for reproducing the image / audio data recorded on the HD media or the optical disc 100 is supplied from the remote controller interface 9, the system controller 2 executes a reproduction process of the user data UD. .

  That is, the system controller 2 acquires user data UD designated by the user from the hard disk device 7 or the optical disk device 10 and supplies the user data UD to the image processing unit 4. The image processing unit 4 generates image / audio data by executing decoding processing, demultiplexing processing, and the like on the user data UD, and supplies these to the display control unit 5.

  The display control unit 5 generates an image output signal and an audio output signal based on the image audio data and supplies them to a display device (not shown), thereby causing the display device to display an image based on the image data and based on the audio data. It is designed to output audio.

  Further, when an operation signal indicating a recording request for recording the user data UD recorded on the HD medium on the optical disc 100 is supplied from the remote controller interface 9, the system controller 2 receives the optical disc 100 of the user data UD. Execute the recording process.

  That is, the system controller 2 supplies the user data UD, the optical disc recording command, and the reproduction address information to the recording / reproduction block 6. The recording / reproducing block 6 obtains user data UD from the hard disk device 7 by supplying an information reproducing command and reproduction address information to the hard disk device 7.

  The recording / reproducing block 6 records the user data UD on the optical disc 100 by generating an optical disc recording address for the user data UD and supplying the information recording command, the user data UD and the optical disc recording address to the optical disc apparatus 10. It is made to let you.

  As described above, the hard disk recorder 1 records the user data UD input from the tuner 3 and the user data UD input from the external interface 11 on the HD media and the optical disc 100, and the users already recorded on the HD media and the optical disc 100. The data UD is reproduced.

(1-2) Configuration of Optical Disc Device As shown in FIG. 2, the optical disc device 10 applies a light beam to an optical disc 100 of, for example, a DVD (Digital Versatile Disc) system or a BD (Blu-ray Disc, registered trademark) system. By performing irradiation, information is recorded and reproduced after tracking control and focus control are performed.

  The optical disk apparatus 10 is configured to be totally controlled by the control unit 22. The control unit 22 is mainly configured by a CPU (Central Processing Unit) (not shown), reads various programs such as a basic program, an information recording program, and a safe recording program from a ROM (Read Only Memory) (not shown), and shows these. Various processes such as an information recording process, an information reproducing process, and a parity-added recording process are executed by developing in a random access memory (RAM).

  For example, when the control unit 22 receives an information recording command, user data UD as recording information, and optical disk recording address information from the recording / reproducing block 6 of the hard disk recorder 1 with the optical disk 100 loaded, the optical disk recording address information In addition, a drive command is supplied to the drive control unit 23, and user data UD is supplied to the signal processing unit 24 as recording information.

  Incidentally, a spiral or concentric track is formed on the recording layer 100s of the optical disc 100, and an address for specifying the position of the track is appropriately assigned. The optical disk recording address information is information indicating the address of a track on which data is to be recorded or reproduced (hereinafter referred to as a target track).

  The drive unit 23 drives and controls the spindle motor 25 according to the drive command supplied from the control unit 22 to rotate the optical disc 100 at a predetermined rotation speed, and controls the sled motor 26 to drive the optical pickup 27. The optical disk 100 is moved along the movement axis to a position corresponding to the recording address information for the optical disk in the track direction (that is, the inner circumferential direction or the outer circumferential direction).

  The signal processing unit 24 generates a recording signal by performing various signal processing such as predetermined encoding processing and modulation processing on the supplied recording information, and supplies the recording signal to the optical pickup 27.

  The optical pickup 27 emits a light beam having a predetermined wavelength according to the method of the optical disc 100 from an internal laser diode (not shown), condenses the light beam by the objective lens 28, and irradiates the optical disc 100. It is made like that.

  At this time, the optical pickup 27 performs focus control and tracking control of the objective lens 28 based on the control of the drive control unit 23, thereby aligning the irradiation position of the light beam with the track formed on the recording layer 100s of the optical disc 100. Thus, data is recorded in accordance with a recording signal from the signal processing unit 24.

  When the control unit 22 receives, for example, a data reproduction command and reproduction address information indicating the address of data to be reproduced from an external device, the control unit 22 supplies the driving command to the driving unit 23 and sends the reproduction processing command to the signal processing unit 24. To supply.

  As in the case of recording data, the drive unit 23 controls the spindle motor 25 to rotate the optical disc 100 at a predetermined rotational speed, and controls the sled motor 26 to control the optical pickup 27 for reproduction address information. Move to a position corresponding to.

  The optical pickup 27 performs focus control and tracking control based on the control of the drive unit 23, thereby irradiating the track indicated by the reproduction address information (that is, the target track) on the recording layer 100s of the optical disc 100 with a light beam. The position is adjusted and a light beam with a predetermined light amount is irradiated. At this time, the optical pickup 27 detects a reflected light beam reflected by the recording layer 100 s in the optical disc 100 and supplies a detection signal corresponding to the amount of light to the signal processing unit 24.

  The signal processing unit 24 generates reproduction data by performing various signal processing such as predetermined demodulation processing and decoding processing on the supplied detection signal, and supplies the reproduction data to the control unit 22. In response to this, the control unit 22 is configured to send the reproduction data to an external device.

  As described above, the optical disc apparatus 10 controls the optical pickup 27 by the control unit 22 to record data on the target track in the recording layer 100 s of the optical disc 100 and reproduce data from the target track. .

(1-3) Recording Data on Optical Disk The hard disk recorder 1 records user data UD included in a video camera (not shown) connected to the external interface 11, for example, in response to a user operation input to the remote controller 8. When an operation signal indicating a recording request for recording in 100 is supplied from the remote controller interface 9, as shown in FIG. 3, a safe mode selection screen PC1 is displayed on a display device (not shown).

  In this safe mode selection screen PC1, the user selects either LP (Long Play) mode or SP (Standard Play) mode by moving the arrow displayed on the screen according to the operation input of the remote controller 8. Let This LP mode is a mode in which more user data UD is recorded by increasing the compression rate of user data UD to be recorded (that is, lowering the image quality). The SP mode is a mode for recording record information by compressing the user data UD at a normal compression rate.

  In the secure mode selection screen PC1, a check box CH is displayed adjacent to the area where “safe mode” is displayed, and the user is allowed to select whether or not to check the check box CH. Yes.

  The hard disk recorder 1 has a normal mode and a safe mode. The normal mode is a mode in which user data UD is sequentially recorded from, for example, the innermost peripheral portion to the outermost peripheral portion in the recording layer 100s of the optical disc 100.

  The secure mode is a mode in which user data UD is recorded in duplicate or parity data PD of user data UD is recorded. As a result, when a part of the user data UD recorded on the optical disc 100 cannot be reproduced, it is possible to reproduce using the overlapping user data UD or parity data PD.

  When the determination button (not shown) of the remote controller 8 is operated in a state where the check box CH is not checked, the hard disk recorder 1 recognizes that the normal mode has been selected and sequentially stores the user data UD on the optical disc 100. Record.

  On the other hand, the hard disk recorder 1 recognizes that the safe mode is selected when the check box CH is checked according to the operation input to the remote controller 8, and displays the RAID (Redundant Arrays of Inexpensive Disks) mode selection screen PC2 on the display device. Display.

  On the RAID mode selection screen 32, the three RAID modes “mode 1”, “mode 2”, and “mode” displayed as the secure mode are moved by moving the arrow displayed on the screen according to the operation input of the remote controller 8. The user is allowed to select any one of “mode 3”.

  In these three modes, the user data UD is overlapped or the parity data PD of the user data UD is recorded, so that the recording capacity of the optical disc 100 is reduced. In view of this, the RAID mode setting screen 32 displays a notice that the recording capacity is reduced under the three modes.

  Mode 1 is a mode in which user data UD and parity data PD generated from the user data UD are recorded (details will be described later). By recording the parity data PD, the recording capacity of the optical disc 100 is about 75%. To decrease. For this reason, the RAID mode selection screen PC2 displays “75% recordable” adjacent to “mode 1” to allow the user to recognize how much the recording capacity is reduced (that is, the degree of reduction in the recording capacity). Has been made to get. Note that the decrease in recording capacity is also displayed in Mode 2 and Mode 3 in the same manner.

  Specifically, the optical disc 100 conforms to the DVD standard and is configured in a disk shape having a diameter of about 120 [mm] as shown in FIG. The optical disc 100 has a center hole 100H having a diameter of about 15 [mm], and is fixed to the output shaft of the spindle motor 25 through the center hole 100H by the holding portion 5A in the optical disc apparatus 10 (FIG. 2). It is made like that.

  In the optical disc 100, data is recorded in an area (hereinafter referred to as a recording area R) that is approximately 24 to 58 [mm] from the virtual center 100C, as indicated by hatching in the figure, and the recording area. Data is reproduced from R. In the recording area R, tracks are formed in a spiral shape, and the interval between the tracks (so-called track pitch) is about 0.74 [μm].

  In the recording area R, data to be originally recorded (so-called user data UD) other than management data or the like is recorded. When the user data UD is recorded in the recording area R, the error correction code is calculated and interleaved every 32768 bytes, and further divided into sectors SC every 2048 bytes. It is managed by the sector number assigned to.

  In practice, in the recording area R, the address 0x30000 (hexadecimal notation, the same applies hereinafter) is assigned to the first sector SCs on the innermost periphery, and the address 0x25FDBF is assigned to the last sector SCe on the outermost periphery. Incidentally, from the first sector SCs to the last sector SCe, there are 2293184 sector SCs in decimal number, and since the capacity of one sector is 2048 bytes, the entire optical disc 100 has 2293184 × 2048 = 4696440832 bytes. That is, the capacity is about 4.7 gigabytes.

  As shown in FIG. 6 corresponding to FIG. 5, in the optical disc 100, the recording area R is divided into four parts, a first recording area R1, a second recording area R2, a third recording area R3, and a fourth recording area R4.

  The first recording area R1 to the fourth recording area R4 are divided so that the respective recording capacities are equal, and the boundary portion between the first recording area R1 and the second recording area R2 starts from the center 100C of the optical disc 100. The boundary between the second recording area R2 and the third recording area R3 is about 44.4 [mm] from the center 100C of the optical disc 100, and the third recording area R3 and the third recording area R3 are about 35.7 [mm]. The boundary portion of the four recording areas R4 is about 51.6 [mm] from the center 100C of the optical disc 100.

  User data UD is recorded in the first recording area R1, the second recording area R2, and the third recording area R3, and the fourth recording area R4 is generated based on the user data UD. The parity data PD thus recorded is recorded.

  When recording data on the optical disc 100, the hard disk recorder 1 (FIG. 1) executes a predetermined data recording program by the system controller 2 and stores data to be recorded on the optical disc 100 selected by the user (ie, user data UD). Recording on the optical disc 100.

  At this time, the hard disk recorder 1 assigns the user data UD to each sector SC of the user data UD area in the optical disc 100 and calculates the exclusive OR of the user data UD assigned to the sectors SC corresponding to each other in the user data UD area. This is assigned as parity data PD of the corresponding sector SC in the parity data area.

  Specifically, as shown in FIG. 7, the recording / reproducing block 6 of the hard disk recorder 1 includes each sector SC in the first recording area R1, each sector SC in the second recording area R2, and the third recording area in the order of addresses of each sector SC. Each sector SC of R3 is associated with each sector SC of the fourth recording area R4. The recording / reproducing block 6 stores a sector correspondence table TS in which a correspondence relationship of addresses of the sectors SC in the first recording area R1 to the fourth recording area R4 is tabulated in a ROM (not shown).

  The recording / reproducing block 6 includes the exclusive OR of the user data UD recorded in the sectors SC of the first recording area R1 to the third recording area R3 corresponding to each other (indicated by the operation symbol “$” in the figure) for each byte. Thus, parity data PD is generated and is recorded in the sector SC of the fourth recording area R4.

  For example, the recording / reproducing block 6 includes the user data UD of the sector SC at the address 0x30000 in the first recording area R1, the user data UD of the sector SC at the address 0xBBF70 in the second recording area R2, and the sector SC at the address 0x147EE0 in the third recording area R3. The exclusive OR of the user data UD is calculated in units of bytes. The recording / reproducing block 6 uses this as the parity data of the sector SC at the address 0x1D3E50 in the fourth recording area R4. The details of the parity addition recording process corresponding to mode 1 will be described later.

  Mode 2 is a mode in which user data UD is recorded on optical disc 100 twice. Therefore, two identical user data UDs are recorded on the optical disc 100 recorded in mode 2. For this reason, the recording capacity of the optical disc 100 is reduced to about 50%.

  In this case, the recording area R of the optical disc 100 is divided into a first recording area R1 and a second recording area R2. The first recording area R1 and the second recording area R2 are divided so that their recording capacities are equal, and the boundary portion between the first recording area R1 and the second recording area R2 is the center 100C of the optical disc 100. To about 44.4 [mm].

  The hard disk recorder 1 records user data in the first recording area R1, and records the same copy data as the user data in the second recording area R2. At this time, the hard disk recorder 1 associates each sector SC of the first recording area R1 with each sector SC of the second recording area R2 in the address order of each sector SC, and records the same data in the corresponding sectors SC. Has been made.

  Mode 3 is a mode in which user data UD is recorded on optical disc 100 four times. Accordingly, four identical user data UDs are recorded on the optical disc 100 recorded in mode 2.

  In this case, the first recording area R1 to the fourth recording area R4 are divided in the same manner as in mode 1. The hard disk recorder 1 records the user data UD in the first recording area R1, and records the same copy data as the user data UD in each of the second recording area R2, the third recording area R3, and the fourth recording area R4. Has been made.

  At this time, the optical disc apparatus 1 associates each sector SC of the first recording area R1 to each sector SC of the fourth recording area R2 in the address order of each sector SC, and records the same data in the corresponding sectors SC. It is made like that.

  The hard disk recorder 1 checks the data amount of the user data UD (hereinafter referred to as “UD data amount”), compares the recording capacity of the optical disc 100 in each mode with the UD data amount, and compares the user data UD. Is recorded in one optical disc 100.

  When the hard disk recorder 1 cannot record the user data UD in one optical disk 100, for example, “Current selection mode 2 has insufficient capacity.” At the bottom of the RAID mode setting screen 32 (FIG. 4). "Please change." Is displayed to indicate that the recording capacity is insufficient and that the mode change is recommended.

  As described above, in the hard disk recorder 1, when the user data UD is recorded on the optical disc 100, the normal mode and the safe mode can be switched according to the user's selection.

(1-4) Parity-added recording process Next, the contents of the information recording process in mode 1 (hereinafter referred to as a parity-added recording process) will be specifically described. Note that the parity-added recording process in the first embodiment is a real-time method for generating parity data PD when user data UD is recorded on the optical disc 100.

  When the system controller 2 (FIG. 1) of the hard disk recorder 1 starts the parity addition recording process, it supplies the user data UD and the optical disk recording command input from the external interface 11 to the recording / reproducing block 6. Further, the system controller 2 supplies UD data amount information indicating the UD data amount to the recording / reproducing block 6.

  As shown in FIG. 8, in the recording / reproducing block 6, the user data UD is supplied to the data allocating unit 31. The data assigning unit 31 divides the user data UD into three equal parts based on the UD data amount information and assigns the user data UD to the first recording area R1, the second recording area R2, and the third recording area R3, and the user data UD is optical disc A recording address is added and supplied to the recording control unit 32.

  Hereinafter, the user data UD assigned to the first recording area R1 is assigned to the first area data UD1, and the user data UD assigned to the second recording area R2 is assigned to the second area data UD2 and the third recording area UD3. The user data UD is referred to as third area data UD3.

  The recording control unit 32 supplies the first area data UD1 to the third area data UD3 to the optical disc apparatus 10. As a result, in the first recording area R1 to the third recording area R3 of the optical disc 100, the first area data UD1 to the third area data UD3 are recorded in each sector SC indicated as the optical disc recording address. .

  At the same time, the recording control unit 32 adds the HD recording address to the first area data UD1 to the third area data UD3, and also sends the first area data UD1 to the third area data UD3 and the HD recording address to the hard disk device 7. Supply. As a result, the first area data UD1 to the third area data UD3 are recorded on the HD medium with the optical disk recording address added.

  When the recording control unit 32 finishes recording the first area data UD1 to the third area data UD3 on the optical disc 100, the first area data UD1 to the third area UD1 from the hard disk device 7 as shown in FIG. 9 corresponding to FIG. The area data UD3 is acquired for every several sectors, for example, and the first area data UD1 to the third area data UD3 are rearranged for each sector corresponding to each other and supplied to the parity data generation unit 33.

  The parity data generation unit 33 extracts the optical disk recording address from the first area data UD1 to the third area data UD3, and calculates an exclusive OR of the extracted first area data UD1 to the third area data UD3. The parity data PD is generated and supplied to the parity data allocation unit 34 together with the extracted recording address for the optical disc.

  The parity data allocation unit 34 adds the optical disk recording address in the fourth recording area R4 to the parity data PD based on the extracted optical disk recording address, and supplies this to the recording control unit 32.

  The recording control unit 32 supplies the parity data PD and the added optical disk recording address to the optical disk device 10. As a result, in the fourth recording area R4 of the optical disc 100, the parity data PD is recorded in each sector SC indicated as the optical disc recording address.

  Thus, the recording / reproducing block 6 of the hard disk recorder 1 records the first area data UD1 to the third area data UD3 not only on the optical disc 100 but also on the HD medium. When the recording / reproducing block 6 finishes recording the first area data UD1 to the third area data UD3 on the optical disc 100, the recording / reproducing block 6 reads the first area data UD1 to the third area data UD3 from the HD medium and generates parity data PD. In addition, recording is performed on the optical disc 100.

  Thereby, the hard disk recorder 1 can quickly acquire the first area data UD1 to the third area data UD3 by the hard disk device 7 with quick access, and can generate the parity data PD. As a result, the hard disk recorder 1 can shorten the time required to record all the first area data UD1 to the third area data UD3 and the parity data PD on the optical disc 100.

(1-5) Reproduction of Data from Optical Disk When the system controller 2 of the hard disk recorder 1 reproduces the optical disk 100 with the parity added and recorded in the mode 1, the user data UD is reproduced in the same manner as when reproducing the normal optical disk 100. Data are sequentially read from the head sector SCs (FIG. 2), that is, from address 0x30000 in the first recording area R1.

  At this time, the system controller 2 performs a predetermined error correction process for all user data UD based on the error correction code recorded every 32768 bytes, determines whether there is an error, and corrects a correctable error. I do. In addition, the system controller 2 determines whether there is data that has not been able to correct the error by the error correction processing (hereinafter referred to as uncorrectable error data).

  When there is uncorrectable error data, the system controller 2 recognizes the address of the sector SC in which the error data is recorded (hereinafter referred to as the error sector SCr), and is associated with the error sector SCr. User data UD and parity data (hereinafter referred to as “corresponding normal data”) are read from the sector SC (that is, the corresponding sector) in the divided recording area. Subsequently, the system controller 2 restores the user data UD of the error sector SCr by calculating the exclusive OR of the corresponding normal data.

  For example, it is assumed that the system controller 2 cannot correctly read the user data UD from the sector SC at address 0xBBF71 (FIG. 7) in the second recording area R2, and the sector SC is the error sector SCr. At this time, the system controller 2 sends user data UD or parity data from each sector SC of the first recording area R1 corresponding to the error sector SCr, the address 0x30001, the third recording area R3, the address 0x147EE1, and the fourth recording area R4, address 0x1D3E51. Are read as corresponding normal data.

  Subsequently, the system controller 2 restores the user data UD at address 0xBBF71 in the second recording area R2, which is the error sector SCr, by calculating the exclusive OR of the corresponding normal data.

  As described above, when reproducing the user data UD from the optical disk 100 on which the parity is added, the system controller 2 detects the error sector SCr that has not been correctly read out from the user data UD recorded in the user data UD area. The user data UD or the parity data is read from the sector SC of the other divided recording area corresponding to the SCr to obtain the corresponding normal data, and the exclusive OR of the corresponding normal data is calculated to restore the user data UD of the error sector SCr. As a result, the reading performance of the user data UD is improved. Hereinafter, this data reproduction is referred to as parity restoration reproduction.

  Incidentally, the optical disk 100 is not limited to the optical disk recorded by the optical disk device 10 of the hard disk recorder 1, but for example, an optical disk recorded by another optical disk device, or a pit or the like formed by using a stamper or the like in a factory or the like. A so-called ROM type optical disc in which data is recorded may be used.

(1-6) Mode Selection Processing Procedure Next, the mode selection processing procedure RT1 executed according to the secure recording program will be described with reference to the flowchart shown in FIG.

  When the system controller 2 of the hard disk recorder 1 is requested to record the user data UD on the optical disc 100, the system controller 2 proceeds to step SP1.

  In step SP1, the system controller 2 displays the safe mode selection screen PC1, and when the user selects whether to perform recording in the normal mode or the safe mode, the process proceeds to the next step SP2.

  In step SP2, the system controller 2 confirms whether or not the safe mode has been selected. If a negative result is obtained, the system controller 2 moves to the next step SP8, starts recording in the normal recording mode, and ends. Then, the process ends.

  On the other hand, when a positive result is obtained in step SP2, the system controller 2 proceeds to the next step SP3, confirms the UD data amount that is the data amount of the user data UD, and proceeds to the next step SP4.

  In step SP4, the system controller 2 displays the RAID mode setting screen PC2, and when the user selects any one of the mode 1 to mode 3, the process proceeds to the next step SP5.

  In step SP5, the system controller 2 compares the recording capacity of the optical disc 100 in the selected RAID mode with the UD data amount, and determines whether the recording capacity is sufficient.

  If a negative result is obtained here, this means that all of the user data UD cannot be recorded on one optical disc 100. At this time, the system controller 2 returns to step SP4, and the RAID mode setting screen is displayed. The PC 2 displays a message indicating that the recording capacity is insufficient and recommends a mode change, and waits for a new RAID mode to be selected.

  On the other hand, if an affirmative result is obtained in step SP5, this indicates that all of the user data UD can be recorded on one optical disc 100. At this time, the system controller 2 performs the next step. Move to SP6.

  In step SP6, the system controller 2 starts recording the user data UD in the selected RAID mode in the secure mode, moves to an end step, and ends the process.

(1-7) Parity-added recording processing procedure Next, a parity-added recording processing procedure RT2 executed according to the secure recording program will be described with reference to the flowchart shown in FIG.

  When the recording / reproducing block 6 of the hard disk recorder 1 starts the parity addition recording process, the process proceeds to step SP21 where the first area data UD1 is recorded in the first recording area R1 of the optical disc 100 and the first area data UD1 is recorded in HD. After recording on the medium, the process proceeds to the next step SP22.

  In step SP22, the recording / reproducing block 6 records the second area data UD2 in the second recording area R2 of the optical disc 100, and when recording the second area data UD2 in the HD medium, moves to the next step SP23.

  In step SP23, the recording / reproducing block 6 records the third area data UD3 in the third recording area R3 of the optical disc 100. When the third area data UD3 is recorded in the HD medium, the process proceeds to the next step SP24.

  In step SP24, the recording / reproducing block 6 starts reading the first area data UD1 to the third area data UD3 from the HD medium, and proceeds to the next step SP25.

  In step SP25, the recording / reproducing block 6 starts generating the parity data PD based on the first area data UD1 to the third area data UD3 that are sequentially read, and proceeds to the next step SP26.

  In step SP26, the recording / reproducing block 6 records all the sequentially generated parity data PD in the fourth recording area R4 of the optical disc 100, and then proceeds to an end step and ends the process.

(1-8) Operation and Effect In the above configuration, the hard disk recorder 1 is optical recording data to be recorded on the optical disc 100 with respect to the optical disc 100 in which data is managed for each sector SC that is a predetermined block. It has an optical disk device 10 for recording user data UD.

  The hard disk recorder 1 divides the recording area R on the optical disc 100 into a first recording area R1 to a fourth recording area R4, which are four divided areas, with a predetermined number of divisions, and the first recording area R1 to the first recording area R1 to the fourth recording area R4. Three recording areas R3 are set as data areas, and user data UD is allocated to the first area data UD1 to the third data area UD3, respectively.

  The hard disk recorder 1 receives user data UD based on user data UD (first area data UD1 to second area data UD3) for each sector SC corresponding to each other between the first recording area R1 and the third recording area R3. Parity data PD, which is redundant data for restoration, is calculated.

  The hard disk recorder 1 sets the divided area other than the data area as the fourth recording area R4 as the redundant area, and the sector SC of the fourth recording area R4 corresponding to the sector SC of the first recording area R1 to the third recording area R3. Parity data PD is allocated to each.

  The hard disk recorder 1 has a recording capacity larger than the first recording area R1 to the third recording area R3, and has a hard disk device 7 as a recording / reproducing device for recording and reproducing data. The hard disk recorder 1 records the first area data UD1 to the third area data UD3 in the first recording area R1 to the third recording area R3 by controlling the optical disk apparatus 10 and the hard disk apparatus 7 by the recording / reproducing block 6. The first area data UD1 to the third area data UD3 are recorded in the hard disk device 7.

  The hard disk recorder 1 finished recording the first area data UD1 to the third area data UD3 in the first recording area R1 to the third recording area R3, and recorded the data on the hard disk device 7 when calculating the parity data PD. The user data UD is reproduced, and the parity data PD calculated based on the reproduced user data UD is recorded in the fourth recording area R4.

  Here, the hard disk recorder 1 sequentially records the first area data UD1 to the third area data UD3 supplied sequentially in the first recording area R1 to the third recording area R3 of the optical disc 100. In contrast, the hard disk recorder 1 generates parity data PD based on the first area data UD1 to the third area data UD3 recorded in the corresponding sectors SC in the first recording area R1 to the third recording area R3. There is a need.

  That is, when the hard disk recorder 1 reproduces the first area data UD1 to the third area data UD3 from the optical disc 100, it becomes necessary to alternately access the first recording area R1 to the third recording area R3. In general, the optical disc apparatus 10 has a slow access to the optical disc 100, and particularly requires the drawing of a light beam every time the separated recording area R is accessed. Therefore, the first recording area R1 to the third recording area R3 are required. When accessing alternately, it takes a long time to reproduce the user data UD.

  On the other hand, in the hard disk device 7, the access speed to the HD media is extremely high compared to the access speed to the optical disk 100 of the optical disk device 10, and the seek operation does not require much time.

  The hard disk recorder 1 records the first area data UD1 to the third area data UD3 on the HD medium of the hard disk device 7, and calculates the first area data UD1 to the third area UD from the HD medium when calculating the parity data PD. The area data UD3 is reproduced.

  As a result, the hard disk recorder 1 can shorten the time for reproducing the first area data UD1 to the third area data UD3, and therefore the time until the parity data PD is completely recorded on the optical disc 100 in the parity addition recording process. Can be shortened.

  In other words, the hard disk recorder 1 can use the hard disk device 7 that is originally used for recording the user data UD as a work memory according to a user's request, so that the recording capacity of the work memory is not increased. You can do it.

  Further, the hard disk recorder 1 records all of the user data UD (first area data UD1 to third area data UD3) on the HD medium in the hard disk device 7, and the recording of the user data UD to the hard disk device 7 is completed. When the recording of the user data UD is completed, the user data UD is reproduced from the hard disk device 7 and supplied to the parity data generation unit 33.

  Thereby, the hard disk recorder 1 can generate and record the parity data PD based on the user data UD quickly reproduced after the user data UD is recorded on the optical disc 100.

  Further, the hard disk recorder 1 causes the parity data generating unit 33 to supply user data UD for each sector SC corresponding to each other in the first recording area R1 to the third recording area R3.

  Thereby, the hard disk recorder 1 can reduce the capacity of the buffer memory as compared with the case where the user data UD is supplied to the parity data generation unit 33 for every several sectors SC, for example.

  According to the above configuration, the hard disk recorder 1 regards the first recording area R1, the second recording area R2, the third recording area R3, and the fourth recording area R4 as independent recording areas, and each first recording area R1. User data UD is recorded in each sector SC of the third recording area R3. Also, the hard disk recorder 1 calculates exclusive OR of user data UD to be recorded in the corresponding sectors SC of the first recording area R1 to the third recording area R3 to obtain parity data, which is used as the parity data area. Are recorded in the corresponding sector SC. This can be regarded as a recording method that is partially similar to RAID 3 or RAID 4 using a plurality of hard disk drives.

  At this time, the hard disk recorder 1 records not only the first recording area R1 to the third recording area R3 on the optical disc 100 but also the first area data UD1 to the third area data UD3 on the hard disk device 7, and stores the parity data PD. When calculating, the first area data UD1 to the third area data UD3 are reproduced from the hard disk device 7. Thereby, the hard disk recorder 1 significantly shortens the time for reproducing the first area data UD1 to the third area data UD3 as compared with the case of reproducing the first area data UD1 to the third area data UD3 from the optical disc 100. Thus, an optical disc recording apparatus and a data recording method capable of recording user data UD and parity data PD on the optical disc 100 in a short time without greatly changing the configuration of the hard disk recorder 1 can be realized.

(1-9) Other Embodiments In the first embodiment described above, generation of parity data PD is started when the recording of the third area data UD3 in the third recording area R3 on the optical disc 100 is completed. However, the present invention is not limited to this. For example, the generation of the parity data PD may be started when the recording of the third area data UD3 to the hard disk device 7 is completed.

  That is, when all the third area data UD3 is supplied to the hard disk device 7, the recording control unit 32 supplies the information reproduction command and the reproduction address information to the hard disk device 7 regardless of the recording status with respect to the optical disk device 10, and the first The reproduction of the area data UD1 to the third area data UD3 is started. Then, the recording control unit 32 rearranges the first area data UD1 to the third area data UD3 as they are for each sector, supplies them to the parity data generation unit 33, and starts generating parity data PD. As a result, it is possible to reduce the time lag from the end of the recording of the third area data UD to the third recording area R3 to the start of the recording of the parity data PD to the fourth recording area R4.

  In the first embodiment described above, the case where the first area data UD1 to the third area data UD3 are recorded on the HD media in the hard disk device 7 has been described. However, the present invention is not limited to this. is not. In short, it is only necessary to record in a memory having a recording capacity larger than that of the first recording area R1 to the third recording area R3. For example, even when recording in a flash memory or the like, it is the same as in the above-described embodiment. An effect can be obtained.

  Furthermore, in the above-described first embodiment, the case where the first area data UD1 to the third area data UD3 are sequentially recorded on the HD medium has been described, but the present invention is not limited to this. For example, the first area data UD1 to the third area data UD3 corresponding to each other may be consolidated and recorded (for example, the first area data UD1 to the third area data UD3 are recorded for each sector). good. As a result, the hard disk recorder 1 simply reads the first area data UD1 to the third area data UD3 from the HD media in sequence, and does not particularly rearrange the first area data UD1 to the third area data UD3 corresponding to each sector. Can be played.

  Furthermore, in the above-described first embodiment, the case where the present invention is applied to the hard disk recorder 1 having the hard disk device 7 has been described, but the present invention is not limited to this. In short, it is only necessary to have an optical disk device and a memory having a recording capacity larger than that of the first recording area R1 to the third recording area R3. be able to.

  Furthermore, in the above-described first embodiment, the case where the recording area R of the optical disc 100 is divided into four has been described, but the present invention is not limited to this, and an arbitrary number of divisions of three or more may be used. In this case, if the number of divisions is increased, the capacity of each divided recording area is reduced and the capacity of parity data is also reduced, so that the recording capacity of the user data UD can be increased. However, when performing parity restoration / reproduction, it is necessary to correctly read data from all sectors SC other than the error sector SCr among the corresponding sectors SC, that is, (division number-1) sectors SC. This will reduce the possibility. For this reason, in practice, the number of divisions may be appropriately determined according to the balance between the recording capacity and the reproducibility of the user data UD. Furthermore, the present invention can be applied to an optical disc having a plurality of recording layers even when the recording area is divided for each recording layer.

  Furthermore, in the first embodiment described above, parity data is calculated by calculating an exclusive OR of each user data UD in the corresponding sector SC, and the user data UD and parity data (that is, normally read) (ie, The case where the user data UD is restored by calculating the exclusive OR of the corresponding normal data) has been described, but the present invention is not limited to this, and the redundant data is calculated by other various calculation methods, Further, the user data UD may be restored by a calculation method corresponding to this.

  Furthermore, in the above-described first embodiment, when data is reproduced from the optical disc 100, copy data or parity data is read when there is an error that cannot be corrected by error correction when the user data UD is read. However, the present invention is not limited to this. For example, the validity of the read user data UD is always confirmed by reading the copy data or parity data regardless of the result of error correction. You may do it.

  Further, in the first embodiment described above, the case where data between divided recording areas is made to correspond in units of 2048-byte sectors SC has been described. However, the present invention is not limited to this, and one sector SC. May be an arbitrary number of bytes, and data between divided recording areas may be associated with each other in units of a block having a predetermined number of bytes other than the sector SC.

  Further, in the first embodiment described above, the case where error correction processing is performed every 32768 bytes has been described, but the present invention is not limited to this, and the unit of error correction processing is an arbitrary number of bytes. Alternatively, as described above, when the validity of the user data UD is constantly confirmed, the error correction process may not be performed.

  Further, in the first embodiment described above, as shown in FIG. 7, sectors SC that have a constant address difference value in each divided recording area are combined to form a corresponding sector. Although the present invention is not limited to this, the present invention is not limited to this. The sectors SC of arbitrary addresses may be combined to form a corresponding sector. In short, each sector SC constituting the corresponding sector by referring to the sector correspondence table TS. It is only necessary to be able to recognize the address.

  Further, in the above-described first embodiment, the case where the address of the corresponding sector is recognized with reference to the sector correspondence table TS has been described. However, the present invention is not limited to this, and for example, as shown in FIG. As described above, when the difference value between the addresses in each divided recording area is constant, the address of the corresponding sector SC may be calculated using a mathematical formula for calculating the difference.

  Further, in the above-described first embodiment, the case where the tracks of the optical disc 100 are formed in a spiral shape has been described. However, the present invention is not limited to this, and the tracks are formed in a concentric shape. In short, it is only necessary that the sector SC can be uniquely specified by an address.

  Further, in the above-described first embodiment, the case where the optical disc 100 has only one recording layer on one side has been described. However, the present invention is not limited to this, and for example, a plurality of recording layers are provided. Alternatively, recording layers may be provided on both sides of the optical disc 100. In this case, it is only necessary that each sector SC can be uniquely identified by an address. In particular, if the corresponding sectors SC do not overlap each other, the reproducibility when there is a defect can be improved. .

  Further, in the first embodiment described above, the type of the optical disc 100 is not particularly limited, but is a read-only type (so-called ROM type), a write-once type (so-called R (Recordable) type), or a rewritable type (so-called RW). (ReWritable) type or RE type).

  Furthermore, instead of the optical disk 100, a single disk-shaped recording medium on which information is recorded and reproduced by optical, magnetic, or both, or other methods, such as a magneto-optical disk or a magnetic disk, is used. You may do it. In this case, instead of the optical pickup 27 of the optical disc apparatus 10, a component having an information writing / reading function corresponding to the disc-shaped recording medium may be provided.

  Further, in the above-described first embodiment, the case where various programs such as the secure recording program are stored in the ROM in the system controller 2 has been described. However, the present invention is not limited to this, and the various programs Is read from a predetermined DVD-ROM medium and installed in a non-volatile flash memory (not shown) or the like, or read from a removable storage medium such as a memory stick (registered trademark of Sony Corporation) not shown. It may be executed directly, and in addition, conforms to USB interface (not shown), wired LAN (Local Area Network) interface, IEEE (Institute of Electrical and Electronics Engineers) 802.11a / b / g / n, etc. Various programs can be downloaded via a wireless LAN interface (not shown). It may be obtained and executed.

  Furthermore, in the above-described first embodiment, the optical disk device 10 as an optical disk device, the data allocation unit 31 as a recording data allocation unit, the parity data generation unit 33 as a redundant data calculation unit, and the recording / reproduction device The case where the hard disk recorder 1 as the optical disk recording device is configured by the hard disk device 7 of the above, the parity data allocation unit 34 as the redundant data allocation unit, and the recording control unit 32 as the recording control unit has been described. The present invention is not limited to this, and the optical disk recording apparatus according to the present invention includes an optical disk device having various configurations, a recording data allocation unit, a redundant data calculation unit, a recording / reproducing device, a redundant data allocation unit, and a recording control unit. You may make it comprise an apparatus.

(2) Second Embodiment FIGS. 12 to 15 show a second embodiment, and parts corresponding to the first embodiment shown in FIGS. 1 to 11 are denoted by the same reference numerals. In the second embodiment, when the third area data UD3 is supplied, the first area data UD1 and the second area data UD2 recorded on the HD medium are read to generate the parity data PD. This is different from the first embodiment. Note that the configurations of the hard disk recorder 1 and the optical disk device 10 are the same as those in the first embodiment, and thus description thereof is omitted. Note that the parity-added recording process in the second embodiment is a real-time method for generating parity data PD when user data UD is recorded on the optical disc 100, as in the first embodiment.

(2-1) Parity-added recording on optical disc As shown in FIG. 12 corresponding to FIG. 8, the data allocation unit 31X divides the user data UD into three equal parts based on the UD data amount information, and the first recording area R1 The optical disk recording address is added to the user data UD and assigned to the second recording area R2 and the third recording area R3 and sequentially supplied to the recording control unit 32X.

  When the first area data UD1 and the second area data UD2 are supplied, the recording control unit 32X supplies the first area data UD1 and the second area data UD2 to the optical disc device 10. As a result, in the first recording area R1 and the second recording area R2 of the optical disc 100, the first area data UD1 and the second area data UD2 are recorded in each sector SC indicated as the optical disc recording address. .

  At the same time, the recording control unit 32X adds the HD recording address to the first area data UD1 and the second area data UD2, and sends the first area data UD1, the second area data UD2, and the HD recording address to the hard disk device 7. Supply. As a result, the first area data UD1 and the second area data UD2 are recorded on the HD medium.

  In the recording control unit 32X, the third area data UD3 is supplied following the first area data UD1 and the second area data UD2. In the recording control unit 32X, when the first area data UD1 and the second area data UD2 are completely recorded on the HD media of the hard disk device 7, the first area data UD1 and the first area data UD1 corresponding to the third area data UD3 supplied continuously are recorded. By reading the two-region data UD2 from the hard disk device 7, the first region data UD1 to the third region data UD3 are supplied to the parity data generation unit 33X for each sector corresponding to each other.

  At this time, as shown in FIG. 13 corresponding to FIG. 12, the recording control unit 32X applies the third area data UD3 to the optical disc 100 in the same manner as the first area data UD1 and the second area data UD2. Record.

  The parity data generation unit 33X extracts an optical disk recording address from the first area data UD1 to the third area data UD3, calculates an exclusive OR of the first area data UD1 to the third area data UD3, and generates parity data. A PD is generated and supplied to the parity data allocation unit 34X together with the extracted optical disc recording address.

  The parity data allocation unit 34X adds the optical disk recording address in the fourth recording area R4 to the parity data PD based on the extracted optical disk recording address, and supplies these to the recording control unit 32X.

  The recording control unit 32X adds the HD recording address to the parity data PD, and supplies the parity data PD and the HD recording address to the hard disk device 7. As a result, the parity data PD is recorded on the HD medium with the optical disk recording address added.

  When the recording control unit 32X finishes recording the third area data UD3 on the optical disc 100, as shown in FIG. 13 corresponding to FIG. 12, the parity data PD and the recording address for the optical disc are read from the HD medium, and the parity Data PD and optical disc recording address are supplied to the optical disc apparatus 10. As a result, in the fourth recording area R4 of the optical disc 100, the parity data PD is recorded in each sector SC indicated as the optical disc recording address.

  The recording control unit 32X is configured to erase the first area data UD1 to the third area data UD3 and the parity data PD from the HD medium when the recording of the parity data PD on the optical disc 100 is completed.

  As a result, the hard disk recorder 1 can prevent the recording capacity of the HD media from being reduced due to the recording of data not intended by the user on the HD media in accordance with the parity-added recording process.

  As described above, the hard disk recorder 1 records the first area data UD1 and the second area data UD2 not only on the optical disc 100 but also on the HD media. When the third area data UD3 is supplied, the hard disk recorder 1 records the third area data UD3 on the optical disc 100, and the first area data UD1 and the second area data UD2 corresponding to the third area data UD3. Is read from the HD media to generate parity data PD, which is recorded on the HD media. When the hard disk recorder 1 finishes recording the third area data UD3 on the optical disc 100, it reads the parity data PD from the HD media and records it on the optical disc 100.

  As a result, the hard disk recorder 1 can generate the parity data PD in parallel with the recording of the third area data UD3, and thereafter reads the parity data PD from the HD medium and stores it in the fourth recording area P4 of the optical disc 100. Compared to the first embodiment, the time required for recording from the start of recording the first area data UD1 to the end of recording of the parity data PD can be shortened as compared with the first embodiment.

(2-2) Parity-added recording processing procedure Next, a parity-added recording processing procedure RT3 executed according to the secure recording program will be described with reference to the flowchart shown in FIG.

  When the recording / reproducing block 6X of the hard disk recorder 1 starts the parity addition recording process, the process proceeds to step SP31 where the first area data UD1 is recorded in the first recording area R1 of the optical disc 100, and the first area data UD1 is HD. After recording on the medium, the process proceeds to the next step SP32.

  In step SP32, the recording / reproducing block 6X records the second area data UD2 in the second recording area R2 of the optical disc 100. When the second area data UD2 is recorded in the HD medium, the process proceeds to the next step SP33.

  In step SP33, when the recording / reproducing block 6X starts recording the third area data UD3 in the third recording area R3 of the optical disc 100, the process proceeds to the next step SP34.

  In step SP34, when the recording / reproducing block 6X starts reading the first area data UD1 and the second area data UD2 from the HD medium, the process proceeds to the next step SP35.

  In step SP35, the recording / reproducing block 6X starts to generate parity data PD from the third area data UD3 that is sequentially supplied, the first area data UD1 that is sequentially read from the HD media, and the second area data UD2. Move to SP36.

  In step SP36, the recording / reproducing block 6X starts recording the parity data PD on the HD medium, and proceeds to the next step SP37.

  In step SP37, the recording / reproducing block 6X determines whether or not the recording of the third area data UD3 into the third recording area R3 is completed. If a negative result is obtained, a positive result is obtained. Continue processing.

  On the other hand, if an affirmative result is obtained in step SP37, this indicates that all of the user data UD has been recorded on the optical disc 100, and at this time, the recording / reproducing block 6X proceeds to the next step SP38. Move.

  In step SP38, the recording / reproducing block 6X reads the parity data PD from the HD medium and records the parity data PD in the fourth recording area R4, and then proceeds to the next step SP39.

  In step SP39, when the recording / reproducing block 6X erases the first area data UD1 to the third area data UD3 and the parity data PD from the HD medium, the process proceeds to an end step and ends the parity additional recording processing procedure RT3.

(2-3) Operation and Effect In the above configuration, the hard disk recorder 1 is the last assigned to the third recording area R3 in which the user data UD is recorded lastly among the first recording area R1 to the third recording area R3. The first recording area R1 and the second recording area R2 as the previous area recording data excluding the third area data UD3 as the area recording data are recorded in the hard disk device 7.

  When the recording of the second area recording data R2 to the hard disk device 7 is completed, the hard disk recorder 1 reproduces the first area data R1 and the second area data R2 from the hard disk device 7 and supplies them to the parity data generation unit 33X. The parity data PD generated by the parity data generation unit 33X is recorded on the HD medium of the hard disk device 7.

  As a result, the hard disk recorder 1 can generate the parity data PD and record it in the hard disk device 7 while the third region data UD3 is recorded in the third recording region R3. The parity data PD may be reproduced and recorded in the fourth recording area R4 of the optical disc 100 as it is.

  Therefore, the hard disk recorder 1 does not generate a time lag for generating the parity data PD, for example, after the third area data UD3 is recorded in the third recording area R3, the parity data PD is directly used in the fourth recording area R4. You can start recording.

(2-4) Other Embodiments In the above-described first embodiment, when the third area data UD3 is supplied, the exclusive OR of the first area data UD1 to the third area data UD3 is calculated. Although the case where the parity data PD is generated by doing so has been described, the present invention is not limited to this. For example, the hard disk recorder 1 reads the first area data UD from the hard disk device 7 when the second area data UD2 is supplied, and calculates the exclusive OR of the first area data UD1 and the second area data UD2. Record in device 7. When the third area data UD3 is supplied, the hard disk recorder 1 calculates the exclusive OR of the first area data UD1 and the second area data UD2 and the exclusive OR of the third area data UD3. Parity data PD can be generated.

(3) Third Embodiment FIGS. 16 to 19 show a third embodiment, and portions corresponding to the first embodiment shown in FIGS. 1 to 11 are denoted by the same reference numerals. The third embodiment is different from the first embodiment in that parity data PD is generated for user data UD recorded in advance on HD media. Note that the configurations of the hard disk recorder 1 and the optical disk device 10 are the same as those in the first embodiment, and thus description thereof is omitted.

(3-1) Parity-added recording on optical disc The hard disk recorder 1 assumes that user data UD is recorded on the optical disc 100 in mode 1 when a digital broadcast program currently being received is recorded on HD media, for example. User data UD is assigned to the first recording area R1 to the third recording area R3 of the optical disc 100. That is, in the parity addition recording process in the third embodiment, the parity data PD is generated and recorded in advance, and the parity data PD is reproduced and recorded when the user data UD is recorded on the optical disc 100. Preliminary recording method.

  Specifically, as shown in FIG. 16 corresponding to FIG. 8, the recording / playback block 6Y receives the data recording unit 31Y when the HD recording command and the user data UD indicating that the user data UD is to be recorded on the HD medium are supplied. The user data UD is supplied to the recording control unit 32Y.

  The recording control unit 32 </ b> Y adds an HD recording address to the user data UD, and supplies the HD recording address and user data UD to the hard disk device 7. As a result, user data UD is recorded on the HD medium.

  When the supply of the user data UD is stopped, the data allocating unit 31Y divides the user data UD into approximately three equal parts based on the UD data amount of the user data UD, and the division information indicating the data amount from the head of the user data UD Is supplied to the recording control unit 32Y.

  The recording control unit 32Y records the user data UD as the first area data UD1 to the third area data UD3 by recording the division information and the HD recording address in association with each other.

  In the hard disk recorder 1, parity data PD is generated and recorded on the HD medium in the idle time when the hard disk recorder 1 is not operating.

  Specifically, as shown in FIG. 17 corresponding to FIG. 16, when the parity generation command is supplied from the system controller 2, the recording / reproducing block 6Y receives the first area data UD1 to the third area data UD3 by the recording control unit 32Y. Is read for each sector.

  The recording control unit 32Y supplies the first area data UD1 to the third area data UD3 to the parity data generation unit 33Y for each corresponding sector. The parity data generation unit 33Y calculates the exclusive OR of the first area data UD1 to the third area data UD3, generates parity data PD, and supplies the parity data PD to the recording control unit 32Y. The recording control unit 32 </ b> Y adds an HD recording address to the parity data PD and supplies it to the hard disk device 7. As a result, parity data PD is recorded on the HD media.

  The hard disk recorder 1 reads the user data UD and the parity data PD from the HD medium when the user requests to record the user data UD recorded on the HD medium on the optical disk 100 in the mode 1 to the optical disk 100. Record.

  Specifically, as shown in FIG. 18 corresponding to FIG. 16, the recording / reproducing block 6Y causes the recording control unit 32Y to output the first area data UD1, the second area data UD2, the third area data UD3, and the parity data PD from the HD medium. Are sequentially read, added with the recording address for the optical disc, and supplied to the optical disc apparatus 10. As a result, the first area data UD1, the second area data UD2, the third area data UD3, and the parity data PD are recorded in the first recording area R1 to the fourth recording area R4 of the optical disc 100, respectively. .

  As described above, in the hard disk recorder 1, the parity data PD is generated in advance during the idle time when the hard disk device 7 and the optical disk device 10 are not used, and is stored in the hard disk device 7. As a result, the hard disk recorder 1 can promptly store the user data and parity data on the optical disc 100 by a simple process of reproducing and recording the user data UD and parity data PD from the hard disk device 7 in response to a recording request by the user in mode 1. PD can be recorded.

(3-2) Parity-added recording processing procedure Next, a parity-added recording processing procedure RT4 executed according to the secure recording program will be described with reference to the flowchart shown in FIG.

  When the recording / reproducing block 6Y of the hard disk recorder 1 starts the recording process of the user data on the HD media in response to the user's request, the process proceeds to step SP41, where the user data UD is converted into the first area data UD1, the second area data UD2, and the The three area data UD3 is recorded on the HD medium, and the process proceeds to the next step SP42.

  In step SP42, the recording / reproducing block 6Y generates the parity data PD in the idle time when the hard disk recorder 1 is not performing the recording process and the reproducing process, and when recording it on the HD medium, moves to the next step SP43.

  In step SP43, the recording / reproducing block 6Y waits for an optical disc recording command to be recorded on the optical disc 100 to record the user data UD recorded on the HD medium, and when the optical disc recording command is supplied. The process proceeds to the next step SP44.

  In step SP44, the recording / reproducing block 6Y acquires the first area data UD1 from the hard disk device 7, and when the first area data UD1 is recorded in the first recording area R1 of the optical disc 100, the process proceeds to the next step SP45.

  In step SP45, when the recording / reproducing block 6Y acquires the second area data UD2 from the hard disk device 7 and records the second area data UD2 in the second recording area R2 of the optical disc 100, the process proceeds to the next step SP46.

  In step SP46, when the recording / reproducing block 6Y acquires the third area data UD3 from the hard disk device 7 and records the third area data UD3 in the third recording area R3 of the optical disc 100, the process proceeds to the next step SP47.

  In step SP47, the recording / reproducing block 6Y acquires the parity data PD from the hard disk device 7, and when the parity data PD is recorded in the fourth recording area R4 of the optical disc 100, the process proceeds to the next step SP48.

  In step SP48, when the recording / reproducing block 6Y deletes the parity data PD from the HD medium, the recording / reproducing block 6Y moves to an end step and ends the parity addition recording processing procedure RT4.

(3-3) Operation and Effect In the above configuration, the hard disk recorder 1 has the user data UD as device recording data recorded in the hard disk device 7 during the idle time when neither the optical disk device 10 nor the hard disk device 7 is operating. Is reproduced and supplied to the parity data generation unit 33Y to cause the parity data generation unit 33Y to calculate the parity data PD.

  When the hard disk recorder 1 records the parity data PD on the hard disk device 7 and records the user data UD on the optical disk 100, the hard disk recorder 1 reproduces the user data UD and the parity data PD from the hard disk device 7 and records them on the optical disk 100.

  As a result, the hard disk recorder 1 can perform user data on the optical disc 100 in a short time by a simple process of simply reproducing the user data UD and parity data PD from the hard disk device 7 and recording them on the optical disc 100 during the parity addition recording process. UD and parity data PD can be recorded.

  The hard disk recorder 1 records the user data UD on the hard disk device 7 without adding the optical disk recording address representing the sector SC to the user data UD.

  As a result, the hard disk recorder 1 can record the user data UD recorded on the hard disk device 7 in response to the user's request without modifying the user data UD, and reproduces the user data UD from the hard disk device 7 in response to the user's request. At this time, the user data UD can be reproduced by a normal reproduction process.

  At this time, since the hard disk recorder 1 can record data for one sector on the optical disc 100 for every four sectors of the HD media, the user data UD can be read for each sector of the optical disc 100 from the HD media. .

(3-4) Other Embodiments In the above-described third embodiment, the case where the parity data PD is erased after the parity addition recording process has been described, but the present invention is not limited to this. It is not always necessary to erase. Moreover, you may make it select erasure | elimination or non-erasure according to a user's selection. For example, the hard disk recorder displays an erasure selection screen that allows the user to select a part or all of the parity data recorded for the safe disk recording when the free space of the hard disk recorder decreases, and according to the user's selection Parity data can be erased.

  In the first to third embodiments described above, a case has been described in which one of the parity addition recording processes according to the first to third embodiments is executed when mode 1 is selected. However, the present invention is not limited to this. For example, when the mode 1 is selected on the RAID mode selection screen PC2, the hard disk recorder 1 displays a selection screen (not shown) to display the real-time method according to the first or second embodiment and the spare according to the third embodiment. One method may be selected from the recording methods, or one method may be selected as an initial setting.

  Further, in the above-described third embodiment, the optical disk device 10 as an optical disk device, the data allocation unit 31Y as a recording data allocation unit, the parity data generation unit 33Y as a redundant data calculation unit, and the recording / reproduction device The hard disk device 7 and the recording control unit 32Y as the redundant data allocating unit and the recording control unit have been described as constituting the hard disk recorder 1 as the optical disk recording device, but the present invention is not limited to this. The optical disc apparatus of the present invention may be constituted by an optical disc device having various other configurations, a recording data allocating unit, a redundant data calculating unit, a recording / reproducing device, a redundant data allocating unit, and a recording control unit. good.

  The present invention can also be used in an optical disc apparatus that records and reproduces user data UD, audio data, various data handled by a computer, and the like on various types of optical discs.

It is an approximate line figure showing the whole hard disk recorder composition. It is a basic diagram which shows the structure of an optical disk device. It is a basic diagram which shows a safe mode selection screen. It is a basic diagram which shows a RAID mode setting screen. It is a basic diagram which shows the recording area of an optical disk. It is an approximate line figure used for explanation of division of a recording area. It is an approximate line figure used for explanation of correspondence of a sector and generation of parity data. It is a basic diagram with which it uses for description of the recording to the 1st-3rd recording area by 1st Embodiment. It is a basic diagram with which it uses for description of the recording to the 4th recording area by 1st Embodiment. It is a flowchart with which it uses for description of a mode selection process sequence. It is a flowchart with which it uses for description of the parity addition recording processing procedure in 1st Embodiment. It is a basic diagram with which it uses for description of the recording to the 1st-2nd recording area by 2nd Embodiment. It is a basic diagram with which it uses for description of the recording to the 3rd recording area | region by 2nd Embodiment. It is a basic diagram with which it uses for description of the recording to the 4th recording area by 2nd Embodiment. It is a flowchart with which it uses for description of the parity addition recording processing procedure in 2nd Embodiment. It is a basic diagram with which it uses for description of recording to the HDD of user data by 3rd Embodiment. It is a basic diagram with which it uses for description of the production | generation of the parity data by 3rd Embodiment. It is a basic diagram with which it uses for description of the recording on the optical disk by 3rd Embodiment. It is a flowchart with which it uses for description of the parity addition recording processing procedure in 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Hard disk recorder, 2 ... System controller, 6, 6X, 6Y ... Recording / reproduction block, 7 ... Hard disk device, 10 ... Optical disk device, 31, 31X, 31Y ... Data allocation part, 32, 32X, 32Y: Recording control unit, 33, 33X, 33Y ... Parity data generation unit, 34, 34X, 34Y ... Parity data allocation unit, UD ... User data, UD1 ... First area data, UD2 ... Second Area data, UD3 ... Third area data, PD ... Parity data, R1 ... First recording area, R2 ... Second recording area, R3 ... Third recording area, R4 ... Fourth recording area, SC ……sector.

Claims (11)

An optical disc device for recording optical recording data to be recorded on the optical disc for an optical disc in which data is managed for each predetermined block;
A recording data allocating unit that divides the recording area of the optical disc into a predetermined number of divided areas and sets a part thereof as a data area, and allocates the optical recording data to the divided areas of the data area
A redundant data calculation unit that calculates redundant data for restoring the recording data based on the recording data for each of the blocks corresponding to each other between the divided areas that are the data areas;
A redundant data allocating unit that assigns the redundant data to the blocks of the redundant area corresponding to the blocks of the data area, the divided areas other than the data area as redundant areas;
A recording / reproducing apparatus that has a recording capacity larger than the data area and records and reproduces data;
By controlling the optical disc device and the recording / reproducing device, the optical recording data is recorded in the data area and at least a part of the optical recording data is recorded on the recording / reproducing device, and the redundant data calculating unit The recording control for reproducing the optical recording data recorded in the recording / reproducing apparatus when calculating the redundant data and recording the redundant data calculated based on the reproduced optical recording data in the redundant area An optical disc recording device having a unit. The recording control unit
When all of the optical recording data is recorded on the recording / reproducing device and the recording of the optical recording data to the recording / reproducing device is completed, the optical recording data is reproduced from the recording / reproducing device and supplied to the redundant data calculation unit The optical disc recording apparatus according to claim 1. The recording control unit
The first area recording data excluding the last area recording data assigned to the divided area where the optical recording data is recorded last among the divided areas of the data area is recorded on the recording / reproducing apparatus, and the first area recording data When the recording to the recording / reproducing device is completed, the recording data from the recording / reproducing device is reproduced to be supplied to the redundant data calculating unit, and the redundant data generated by the redundant data calculating unit is recorded / reproduced. The optical disk recording apparatus according to claim 1, wherein recording is performed on the apparatus. The recording control unit
The optical disc recording apparatus according to claim 1, wherein the optical recording data is supplied to the redundant data calculation unit for each block corresponding to each other in each data area. The recording control unit
2. The optical disk recording apparatus according to claim 1, wherein the optical recording data is recorded on the recording / reproducing apparatus in a state where a recording address representing the block is added to the apparatus recording data. For an optical disk in which data is managed for each predetermined block, the recording area is divided into a predetermined number of divided areas and a part thereof is used as a data area, and optical recording data to be recorded on the optical disk is stored in the data area. Recording data allocation step to be allocated to each of the divided areas,
An optical disc recording step for recording the optical recording data on the optical disc;
A recording / reproducing apparatus recording step for recording at least a part of the optical recording data with respect to a recording / reproducing apparatus having a recording capacity larger than the data area;
Redundancy for restoring the recording data from the recording data for each block corresponding to each other between the divided areas supplied as the data area supplied based on the optical recording data reproduced from the recording / reproducing apparatus A redundant data calculating step for calculating data;
A redundant data allocating step in which the divided area other than the data area is a redundant area, and the redundant data is allocated to the block of the redundant area corresponding to the block of the data area;
A redundant data recording step of recording the redundant data on the optical disc. Against the computer
For an optical disk in which data is managed for each predetermined block, the recording area is divided into a predetermined number of divided areas and a part thereof is used as a data area, and optical recording data to be recorded on the optical disk is stored in the data area. Recording data allocation step to be allocated to each of the divided areas,
An optical disc recording step for recording the optical recording data on the optical disc;
A recording / reproducing apparatus recording step for recording at least a part of the optical recording data with respect to a recording / reproducing apparatus having a recording capacity larger than the data area;
Redundancy for restoring the recording data from the recording data for each block corresponding to each other between the divided areas supplied as the data area supplied based on the optical recording data reproduced from the recording / reproducing apparatus A redundant data calculating step for calculating data;
A redundant data allocating step in which the divided area other than the data area is a redundant area, and the redundant data is allocated to the block of the redundant area corresponding to the block of the data area;
And a redundant data recording step for recording the redundant data on the optical disc. An optical disc device for recording optical recording data to be recorded on the optical disc for an optical disc in which data is managed for each predetermined block;
A recording data allocating unit that divides the recording area into a predetermined number of divided areas and sets a part thereof as a data area, and allocates the recording data to each of the divided areas of the data area;
A redundant data calculation unit for calculating redundant data for restoring the recording data based on the recording data for each of the blocks corresponding to each other between the divided areas as the data area;
A redundant data allocating unit that assigns the redundant data to the blocks of the redundant area corresponding to the blocks of the data area, the divided areas other than the data area as redundant areas;
A recording / reproducing apparatus having a recording capacity larger than the data area, and recording and reproducing apparatus recording data to be recorded in the recording / reproducing apparatus;
The redundant data calculating unit causes the redundant data calculating unit to reproduce the device recording data recorded in the recording / reproducing device during idle time when the optical disk device and the recording / reproducing device are not operating, thereby supplying the redundant data calculating unit with the redundant data. And the redundant data is recorded on the recording / reproducing device, and when the device recording data is recorded as the optical recording data, the device recording data and the redundant data are reproduced from the recording / reproducing device to the optical disc. An optical disc recording apparatus having a recording control unit for recording. The recording control unit
9. The optical disk recording apparatus according to claim 8, wherein the apparatus recording data is recorded on the recording / reproducing apparatus without adding a recording address representing the block to the apparatus recording data. The recording area in the optical disk in which data is managed for each predetermined block is divided into a predetermined number of divided areas, and a part of the recording area is used as a data area, and the optical recording data to be recorded on the optical disk is divided into the data areas. A record data assignment step to assign to each area;
By reproducing the device recording data recorded in the recording / reproducing device having a recording capacity larger than the data area in the idle time when the optical disc device and the recording / reproducing device are not operating, and supplying them to the redundant data calculating unit Redundant data for restoring the recording data is calculated based on the recording data corresponding to the blocks corresponding to each other between the divided areas as data areas, and the redundant data is recorded in the recording / reproducing apparatus. A redundant data recording step;
A data allocation step in which the divided area other than the data area is a redundant area, and the redundant data is assigned to the block of the redundant area corresponding to the block of the data area;
A data recording method comprising: an optical recording step of reproducing the device recording data and the redundant data from the recording / reproducing device and recording the data on the optical disc when the device recording data is recorded on the optical disc as the optical recording data. Against the computer,
The recording area in the optical disk in which data is managed for each predetermined block is divided into a predetermined number of divided areas, and a part of the recording area is used as a data area, and the optical recording data to be recorded on the optical disk is divided into the data areas. A record data assignment step to assign to each area;
By reproducing the device recording data recorded in the recording / reproducing device having a recording capacity larger than the data area in the idle time when the optical disc device and the recording / reproducing device are not operating, and supplying them to the redundant data calculating unit Redundant data for restoring the recording data is calculated based on the recording data corresponding to the blocks corresponding to each other between the divided areas as data areas, and the redundant data is recorded in the recording / reproducing apparatus. A redundant data recording step;
A data allocation step in which the divided area other than the data area is a redundant area, and the redundant data is assigned to the block of the redundant area corresponding to the block of the data area;
A data recording program for executing the optical recording step of reproducing the device recording data and the redundant data from the recording / reproducing device and recording the data on the optical disc when the device recording data is recorded on the optical disc as the optical recording data.

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