JP4048371B2 - Optical disc recording / reproducing apparatus - Google Patents

Description

The present invention relates to an optical disc recording / reproducing apparatus for recording / reproducing information on / from an optical disc, and more particularly, to an erasing process for a DVD-RW which is an erasable optical disc.

In general, as a method of erasing data on a DVD-RW optical disc once data is recorded, a full blank erasing method of erasing the entire area of the optical disc,
There is a minimally blank erasing method for erasing only a minimum necessary area, and these blank erasing methods are defined in the ATAPI standard. An optical disc erased with the minimal blank erase method cannot be added to a disc at once (
Only the Disc At Once recording method can be used. In order to use the incremental recording method that can be additionally written, the entire area must be erased by the full blank erasing method.
JP 2001-283438 A

In a conventional optical disc recording / reproducing apparatus for recording / reproducing information on / from a DVD-RW optical disc that is erased and recorded in accordance with such a standard, a minimal / blank erasing method is applied to the DVD-RW optical disc. While it takes about 1 minute to erase only the minimum necessary area, for example, it takes about 1.5 hours to erase the entire area by the full blank erase method. An optical disc erased by the minimal blank erasing method can be recorded only by a disc-at-once recording method that cannot be additionally written according to the standard. Note that the prior art of Patent Document 1 does not disclose processing for DVD-RW optical discs.

Therefore, in the conventional optical disc recording / reproducing apparatus, in order to make it possible to perform additional writing after erasing the data on the DVD-RW optical disc, the entire area must be erased by the full blank erasing method. There is a problem that it takes a lot of time, and it takes a lot of time to create a recordable optical disc.

The present invention has been made to solve the above-described problems, and is a recordable and erasable DVD.
An object of the present invention is to provide an optical disc recording / reproducing apparatus capable of creating a recordable optical disc in a short time by enabling data on the optical disc of RW to be erased in a short time.

To achieve the above object, a first aspect of the invention, in the optical disk recording and reproducing apparatus which record or reproduce information on an optical disk, for erasing by full blank erasing method in pseudo manner, DVD- A data area erasing unit for erasing by adding a new data area corresponding to a predetermined erasing time to an area to be erased by a minimal blank erasing method for erasing only a minimum necessary area on an RW optical disk; Based on the full / blank state setting means for setting full / blank state data indicating a full / blank state by a full / blank erasing method for erasing the entire area of the optical disc in the recording management area, and based on the state data of the recording management area Whether the disc state of the optical disc is a full blank state by the full blank erasing method, or whether the minimum A blank state determination means for determining whether or not a minimal blank state by the Lee / Blank erase method, and the data area erasure means for the optical disc when the blank state determination means is determined to be a full blank state wherein by erasing the area by adding a new data area, the erasing considered to be due to pseudo-full blank erasing method, write-once and pairs on the optical disk as specified in the standard by There is provided an optical disk recording / reproducing apparatus comprising a system controller having a recordable means for enabling recording by a simple incremental recording method.

In this configuration, in order to perform recording by the incremental recording method, only the minimum necessary area is erased, and the following processing is performed in order to perform pseudo-erasing by the full blank erasing method. The data area erasing means erases the DVD-RW optical disk by a minimal blank erasing method. The full / blank state setting means erases the area to be erased by adding a new data area corresponding to a predetermined erasing time, and the optical disc is in the recording management area in the full / blank state by the full / blank erasing method. Set the status data to be shown. The blank state determination means determines, based on the state data in the recording management area, whether the optical disc is in a full blank state by the full blank erase method or a minimal blank state by the minimal blank erase method. The recordable means enables recording by the incremental recording method when the blank state determining means determines that the state is full blank. Note that erasing referred to this matter of course that although al is to erase the data recorded in the area, we name it erases the area itself.

According to this configuration, in order to perform recording by the incremental recording method, only the minimum necessary area is erased, and erasing is performed in a pseudo manner by the full blank erasing method. The data on the optical disc can be erased in a short time, and a writeable optical disc can be created in a short time.

A second aspect of the present invention, in the optical disk recording and reproducing apparatus which record or reproduce information on an optical disk, for erasing by all regions erase method in a pseudo manner, need not contain at least the data area on an optical disk Erasing only the minimum area Erasing the area to be erased with the necessary minimum erase method, adding a new data area corresponding to a predetermined erase time, and erasing the entire area of the optical disc in the recording management area When status data indicating the disk status by the all area erasing method is set and it is determined that the disk status is by the all area erasing method based on the status data, the new data area is added to the optical disk. by erasing the realm considered the erased to be due pseudo entire region erasing process, the as stipulated by standards To provide an optical disc recording and reproducing apparatus characterized by comprising a system controller that enables recording by additionally recordable recording to the disk.

In this configuration, in order to perform recording by a recordable recording method, only the minimum necessary area is erased, and the following processing is performed in order to perform pseudo-erasure by the entire area erasing method. System controller, a region erasing minimum necessary erasing method with respect to the optical disk, to erase the addition of new data area corresponding to the erase time which defines Me pre, disk status of the optical disc to the recording management area total State data indicating a state according to the area erasing method is set, and recording by a recording method which can be additionally written when it is determined that the disk state is based on the whole area erasing method based on the state data is enabled.

According to this configuration, in order to perform recording by a recordable recording method, only the minimum necessary area can be erased, and it can be erased as if by the entire area erasing method,
The data on the recordable and erasable optical disc can be erased in a short time, and an additionally recordable optical disc can be created in a short time.

In the invention of claim 3, in the invention of claim 2, the optical disk is a DVD-RW, the entire area erasing method is a full blank erasing method, the necessary minimum erasing method is a minimal blank erasing method, Since the recordable recording method is an incremental recording method, data can be erased from the DVD-RW optical disc by an erasing method defined by the ATAPI standard, and data can be recorded.

In the invention of claim 4, in the invention of claim 2, wherein the system controller in order to perform the erasing by full blank erasing method in a pseudo manner, need not include a data area even without least with respect to the optical disk of the DVD-RW A data area erasing unit for erasing by adding a new data area corresponding to a predetermined erasing time to an area to be erased by a minimal blank erasing method for erasing only a minimum area, and a recording management area of the optical disc. Full-blank state setting means for setting full-blank state data indicating a full-blank state by a full-blank erasing method for erasing all areas, and the disk state of the optical disc based on the state data of the recording management area Whether it is a full blank state by the full blank erasing method, or the minimal blank erasing method Blank state determining means for determining whether or not a minimal blank state by the method, and when the blank state determining means is determined to be a full blank state, the data area erasing means applies the new area to the optical disc. By erasing the area by adding the data area , the erasure is considered to be a pseudo full blank erasing method, and it is based on the incremental recording method that can be added to the optical disc as defined in the standard. Since it has a recordable means that enables recording, it is possible to erase only the minimum necessary area for recording by the incremental recording method, and to perform pseudo-erasing as if by a full blank erasing method. Thus, the data on the recordable / erasable DVD-RW optical disc It becomes possible to erase in time.

As described above, according to the present invention, since the erasing by the full blank erasing method is performed in a pseudo manner, the erasing is performed by the minimal blank erasing method for erasing only the minimum necessary area on the DVD-RW optical disk. Data area erasing means for erasing by adding a new data area corresponding to a predetermined erasing time to the area, and a full / blank state by a full / blank erasing method for erasing the entire area of the optical disc in the recording management area A full / blank state setting means for setting full / blank state data; whether the disk state of the optical disc is a full / blank state by the full / blank erasing method based on the state data of the recording management area; A blank state determination means for determining whether a minimal blank state by a blank erasing method, If this blank state determination means determines that the full blank, by erasing the area by adding the new data area by the data area erasing unit relative to the optical disc, the erase pseudo The system controller is provided with a recordable means that enables recording by an incremental recording method that can be additionally recorded on the optical disc as defined in the standard . In order to perform recording by the incremental recording method, only the minimum necessary area can be erased, and erasing by a full blank erasing method can be performed in a pseudo manner. Data on the optical disc can be erased in a short time, and an optical disc Click can be created in a short period of time.

In addition, according to the present invention, in order to perform erasure by the whole area erasing method in a pseudo manner, the area to be erased by the necessary minimum erasing method for erasing at least the minimum necessary area not including the data area on the optical disc. Erasing by adding a new data area corresponding to a predetermined erasing time, and setting the status data indicating the disk status by the all area erasing method for erasing the entire area of the optical disc in the recording management area, and the status data If it is determined that the disc state is the whole area erasing method based on the above, the new data area is added to the optical disc to erase the area, so that the erasing is simulated according to the whole area erasing method. deemed, system controller that enables recording by write-once recording method with respect to the optical disk as specified in the standard Therefore, it is possible to erase only the minimum necessary area and perform pseudo-erasure by the all area erasing method for recording by a recordable recording method. The data on the optical disc can be erased in a short time, and a writeable optical disc can be created in a short time.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc recording / reproducing apparatus according to an embodiment of the present invention.

The optical disk recording / reproducing apparatus includes a spindle motor 5 that rotates the optical disk 1, an optical pickup 2 that emits a laser beam for reproducing information recorded on the optical disk 1 and receives reflected light from the optical disk 1, and A sled 3 for moving the optical pickup 2 in the radial direction of the optical disc 1, and a spindle motor 5 and the sled 3 are driven according to an instruction from the system controller 22 and an objective lens (not shown) built in the optical pickup 2 And a servo control unit 4 that performs control to move the focal position of the laser beam in the vertical direction and the horizontal direction with respect to the recording surface of the optical disc 1.

The optical disc recording / reproducing apparatus also amplifies an RF signal which is a read signal from the optical pickup 2 during reproduction of the optical disc 1 and converts the RF signal output from the RF amplifier 6 into digital data. A digital signal processing unit 8 that stores data generated by performing signal demodulation processing and error correction processing according to the data format of the optical disc 1 in the RAM 7, and is output from the digital signal processing unit 8 in response to an instruction from the system controller 22. A stream separation unit 9 is provided for separating audio data, sub-picture data, and video data from the data stream.

The optical disc recording / reproducing apparatus also receives an audio decoder 11 that receives the audio data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data to perform the decoding process in the audio decoder 11. The RAM 10 to be stored in the sub-picture decoder 13, the sub-picture decoder 13 that inputs the sub-picture data output from the stream separation unit 9 and performs a predetermined decoding process, and the sub-picture decoder 13 temporarily stores the data to perform the decoding process. The RAM 12 to be stored in the video decoder 15, the video decoder 15 that receives the video data output from the stream separator 9 and performs a predetermined decoding process, and temporarily stores the data for the decoding process in the video decoder 15. RAM 14 is provided.

The optical disk recording / reproducing apparatus also synthesizes the data output from the video decoder 15 and the data output from the sub-picture decoder 13 in accordance with an instruction from the system controller 22, and outputs from the video processor 17. The synthesized data is converted into a video signal for display and a video encoder 18 that displays an image on the display device 20, and the data output from the audio decoder 11 is converted into an analog audio signal and supplied to, for example, a speaker 19. And a D / A converter 16.

The optical disc recording / reproducing apparatus includes an operation unit 21 having various operation keys such as a reproduction key for giving a reproduction instruction to the system controller 22 and a stop key for instructing a reproduction stop, and the entire apparatus. And the system controller 22 to be controlled.
The operation unit 21 may be a remote controller or an operation unit provided on the operation panel of the apparatus main body.

In addition, this optical disk recording / reproducing apparatus performs a calculation process according to the flash ROM 23 storing a program and data for controlling each component of the apparatus and controlling the entire apparatus, and the program and data of the flash ROM 23. System controller 2
CPU 24 for controlling 2.

The optical disc recording / reproducing apparatus also includes a recording data modulation circuit 25 that modulates video / audio data sent from a television receiver (not shown), a personal computer, or the like to the optical disc 1, and the recording data modulation circuit. And a laser modulation circuit 26 that outputs to the optical pickup 2 a laser modulation signal for modulating the laser light emitted from the optical pickup 2 based on the modulation data modulated by 25.

The system controller 22 includes a data area erasing unit 221, a full / blank state setting unit 222, a blank state determination unit 223, and a recordable unit 224, which are features of the present embodiment. The data area erasing means 221 simulates erasing by a full blank erasing method (all area erasing method) in an area where the DVD-RW optical disc 1 is erased by a minimal blank erasing method (minimum necessary erasing method). to do so, the erased by adding new data area corresponding to between erasing a predetermined. The full / blank state setting means 222 sets state data indicating that the disk state of the optical disc 1 is a full / blank state by the full / blank erasing method in the recording management area (RMA in FIG. 2). The blank state determination means 223 is based on the state data of the recording management area, and the disk state of the optical disc 1 is a full blank state by a full blank erase method or a minimal blank state by a minimal blank erase method. Determine whether. Recordable unit 224, when the blank determining means 223 has determined that the full blank, by erasing the area by adding the new data area by the data area erasing unit to those optical disks , the erasure is considered to be due to pseudo-full blank erasing method, enables recording by incremental recording method capable recordable respect to the optical disk as defined by the standard (write once recording method) To do.

FIG. 2 is an area map of the optical disc for explaining the erasing process in the present embodiment. FIG. 3 is a flowchart for explaining the erasing process in the present embodiment. FIG. 4 is an area map of the optical disk for explaining an erasing process by a normal full / blank erasing method. FIG. 5 is an area map of an optical disk for explaining an erasing process by a normal minimal / blank erasing method.

Before explaining the erasing process of the present embodiment, the erasing process by the normal full-blank erasing method will be explained with reference to FIG. In FIG. 4A, the optical disc 1 has a PCA (Power Calibration Area) 31 for performing trial writing for optimizing the recording power of the laser beam, and a recording management area for storing recording management data (status data). RMA (Recording Management A
rea) 32, a lead-in area 33, and a data area 34 are provided. R
As shown in FIG. 4B, the MA 32 has an RMA lead-in area 321, an RMD (Record
ing Management Data) blocks 322, 323, 324, 325, 326, 327, 3
28, 329 and the like. RMD blocks 322, 323, 324, 325, 32
6 and 327 store record management data indicating the state of the optical disc 1.

FIG. 4B shows that the RMD blocks 328 and 329 and subsequent recording management data are erased. FIG. 4C shows that the data in the lead-in area 33 is erased. FIG. 4D shows that the entire data area 34 is erased.
In RMA 32 in FIG. 4D, record management data (status data) indicating that the optical disk 1 is an optical disk erased by the full / blank erase method is set. That is, a value indicating the optical disk erased by the full / blank erase method is set in the disk status.

Therefore, in the erasing process by the normal full / blank erasing method, the RMD block 32 is used.
8, 329 and subsequent recording management data are erased, then the lead-in area 33 is erased, and then the entire data area 34 is erased.

Next, an erasing process by a normal minimal / blank erasing method will be described with reference to FIG. In FIG. 5A, the optical disk 1 has a PCA 31 for trial writing for optimizing the recording power of the laser beam, an RMA 32 as a recording management area for storing recording management data (status data), and a lead-in area 33. , And a data area 34 is provided. As shown in FIG. 5B, the RMA 32 includes an RMA lead-in area 321, an RMD (Reco
rding Management Data) blocks 322, 323, 324, 325, 326, 327,
328, 329 and the like. In RMA 32 in FIG. 5C, recording management data (status data) indicating that the optical disk 1 is an optical disk erased by the minimal / blank erasing method is set. That is, a value representing the optical disk erased by the minimal blank erasing method is set in the disk status.

In the RMD blocks 322, 323, 324, 325, 326, and 327, record management data indicating the state of the optical disc 1 is stored. In FIG. 5B, the RMD block 328,
329 and subsequent recording management data are erased. FIG. 5C shows that the lead-in area 33 is erased. In the erasing by this minimal blank erasing method, the data area 34 is erased.

In an optical disc erased by such a minimal blank erasing method, only a disc-at-once recording method that cannot be additionally written can be used. In order to use an incremental recording method that can be additionally written, Erase by blank erase method must be performed.

Next, the erasing process of this embodiment will be described with reference to FIG. In FIG. 2 (a),
The optical disc 1 has a PCA 31 for test writing for optimizing the recording power of the laser beam.
RMA 32 as a record management area for storing record management data, lead-in area 33,
And a data area 34 is provided. As shown in FIG. 2B, the RMA 32 includes an RMA lead-in area 321 and RMD blocks 322, 323, 324, 325, 3
26, 327, 328, 329 and the like. RMD blocks 322, 323, 32
4, 325, 326, and 327 store record management data (status data) indicating the status of the optical disc 1.

FIG. 2B shows that the RMD blocks 328 and 329 and the subsequent recording management data are erased. FIG. 2C shows that the lead-in area 33 is erased. In FIG. 2D, an area (RMD) to be erased by the minimal blank erase method is used.
This shows that a predetermined area 35 is newly added to the blocks 328 and 329 and the lead-in area 33) to be erased. For example, the predetermined area 35 is set in an area corresponding to an erasing time (30 seconds or the like).

Next, the erasing process according to the present embodiment will be described with reference to the flowchart shown in FIG. When the system controller 22 receives a full / blank request by a user operation (step S1), the data area erasing unit 221 of the system controller 22 records the record management data of the RMD blocks 328 and 329 and the subsequent RMD blocks. The record management data is erased, and the lead-in area 33 is erased (step S2). Next, the data area erasing means 221 erases only a predetermined area 35 on the data area (data area 34). That is, the data area erasing unit 221 performs pseudo blank erasing by a full blank erasing method, and therefore, minimal blank erasing that erases at least the minimum necessary area that does not include the data area on the DVD-RW optical disk. the area to be erased by the method (2 in RMD blocks 328 and 329 and the lead-in area 33), erases the addition of new data area (predetermined area 35) corresponding to the erase time determined in advance.

In addition, after erasing the previous data, newly written data is written in a predetermined area 35 on the data area 34. If the data does not fit in the predetermined area 35, the data next to the predetermined area 35 is stored. Are overwritten in a predetermined area. Such writing processing and overwriting processing can be performed by an incremental recording method that can be additionally written. That is, additional recording available-incremental recording method, since it is a recording method and writes the data for each (predetermined section on the data area) predetermined regions, for example, data in a predetermined area 35 on the data area 34 When the data is written or the data does not fit in the predetermined area 35, the data is overwritten on a predetermined area (a predetermined section on the data area 34) next to the predetermined area 35 .

Next, the RMD disk state is set to a full blank disk (step S4).
. That is, the full / blank state setting means 222 sets full / blank state data indicating the full / blank state of the optical disc 1 by the full / blank erasing method in the RMD RMD block as the recording management area. Then, the processing regarding this full blank is completed (step S5).

Thereafter, the blank state determination means 223 of the system controller 22 determines whether the optical disc is in the full blank state by the full blank erase method based on the state data of the RMD RMD block or the minimal by the minimal blank erase method. -Determine whether it is in a blank state. The recordable unit 224, adding new data area (predetermined region 35) by the data area erasing unit 221 with respect to the optical disc when the blank determining means 223 has determined that the full blank by the child erased area Te, it considered the erased to be due pseudo-full blank erasing method, the recording by incremental recording method capable recordable respect to the optical disk as are specified by a standard enable.

As described above, according to the present embodiment, in order to perform recording by the incremental recording method, only the minimum necessary area is erased, and erasing by the full blank erasing method is performed in a pseudo manner. Data on a possible DVD-RW optical disc can be erased in a short time, and an additionally writable optical disc can be created in a short time.

It is a block diagram which shows the structure of the optical disk recording / reproducing apparatus which concerns on one Embodiment of this invention. 3 is an area map of an optical disc for explaining an erasing process in the embodiment. It is a flowchart for demonstrating the erasure | elimination process in the said embodiment. 5 is an area map of an optical disc for explaining an erasing process by a normal full blank erasing method. 3 is an area map of an optical disc for explaining an erasing process by a normal minimal / blank erasing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 22 System controller 221 Data area deletion means 222 Full blank state setting means 223 Blank state determination means 224 Recording possible means

Claims (4)

In an optical disc recording / reproducing apparatus that records and reproduces information on an optical disc, the minimum necessary amount that does not include at least the data area of the DVD-RW optical disc in order to perform pseudo-erase by the full-blank erase method. A data area erasing means for erasing by adding a new data area corresponding to a predetermined erasing time to an area to be erased by a minimal blank erasing method for erasing only the area, and the entire area of the optical disc in the recording management area A full / blank state setting means for setting full / blank state data indicating a full / blank state by a full / blank erasing method, and based on the state data in the recording management area, the disk state of the optical disc is Whether the blank is completely blank by the blank erasing method or the minimal blanc Blank state determination means for determining whether or not a minimal blank state by a disk erasing method, and when the blank state determination means determines that the blank state is a full blank state, the data area erasing means for the optical disk by erasing the area by adding a new data area, a write-once its erase pseudo considered to be due to the full blank erasing how, with respect to the optical disk as specified in the standard An optical disk recording / reproducing apparatus comprising: a system controller having a recordable unit that enables recording by an incremental recording method. In an optical disk recording / playback device that records and plays back information on an optical disk, the entire area is erased in a pseudo manner so that only the minimum necessary area that does not include the data area is erased from the optical disk. The disk state by the all area erasing method that erases the area to be erased by the minimum erasing method by adding a new data area corresponding to a predetermined erasing time and erasing the entire area of the optical disk in the recording management area. It sets the state data indicating, when it is determined that the disk status by the entire area erasing method on the basis of the status data, and more to clear the area by adding the new data area with respect to the optical disk considered the erased to be due pseudo entire region erasing process for the optical disk as specified in the standard Optical disc recording and reproducing apparatus characterized by comprising a system controller that enables recording by serial possible recording scheme.   The optical disc is a DVD-RW, the entire area erasing method is a full blank erasing method, the minimum necessary erasing method is a minimal blank erasing method, and the recordable recording method is incremental recording. 3. The optical disk recording / reproducing apparatus according to claim 2, wherein the optical disk recording / reproducing apparatus is a system. Since the system controller performs pseudo-erase by the full-blank erase method, erasure is performed by a minimal-blank erase method that erases at least the minimum necessary area that does not include the data area on the DVD-RW optical disk. A data area erasing unit for erasing by adding a new data area corresponding to a predetermined erasing time to the area to be performed, and a full / blank state by a full / blank erasing method for erasing the entire area of the optical disc in the recording management area Full-blank state setting means for setting full-blank state data to be shown, and whether the disk state of the optical disc is a full-blank state by the full-blank erasing method based on the state data of the recording management area, or the minimally・ Determine whether the blank is minimal or blank. A constant blanking state determining means, when the blank determining means determines that the full blank, clear the area by adding the new data area by the data area erase means relative to the optical disk by recordable means that erasing is to enable pseudo-full blank erasing considered to be due to the method, recording by incremental recording method capable recordable to those optical disc as defined by the standard The optical disc recording / reproducing apparatus according to claim 2, comprising:

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