JP2001344762A - Information recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recorder capable of obtaining a reliable recording quality without troubling a user and without taking long processing time in recording information to a rewritable recording medium. SOLUTION: An overwriting recording mode (S2, S5) by an overwriting recording means and an after erase recording mode (S3, S4 and S5) by an after erase recording means are used in a selective manner. One of the mode is selected (S1) and recorded by a recording mode selecting means to select the after erase recording mode so as to irradiate the recorded area of the optical disk with an erasing light from a semiconductor laser and to irradiate the area with light for recording after then, thereby a reliable recording quality is assured. On the other hand, in the case where a recording quality is not deteriorated in particular, the overwriting mode is selected for performing overwriting recording without taking long processing time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an information recording apparatus for a rewritable recording medium such as a phase change type recording medium.

[0002]

2. Description of the Related Art As one of rewritable recording media, a CD-RW (Compact Di) using a phase-change material as a recording material is used.
sc-Rewritable) optical disks. This phase-change material has a reversible change characteristic, and when it is rapidly cooled after being given heat, it becomes an amorphous state having a low reflectance.
By gradually applying heat and then gradually cooling, a crystal state with high reflectivity is obtained.

In a CD-RW optical disk, for example, FIG.
EFM (Eight-Fourteen Modulation)
By irradiating the recording information with a laser emission waveform (write strategy) in accordance with a multi-pulse, information is recorded by creating two states having different reflectivities. In the CD-RW optical disk, an amorphous state occurs at A in FIG. 8 and a crystalline state occurs at B in FIG. A in FIG.
Is a repetitive multi-pulse waveform of the write power Pw and the read power Pr, and a pit string having a width of 3T to 11T is formed on the groove according to the pulse length (number of pulses) of the repetitive multi-pulse. The crystal state between the pits is formed by a laser beam having erase power Pe. As a result, EFM pits similar to the CD are formed.
Information can be reproduced in accordance with the read signal shown therein. In addition, since it has a reversible change characteristic, it can be repeatedly recorded (WRIT
E) is possible.

[0004] To perform repetitive recording, a recording method in which only the recording management information on the CD-RW optical disk is erased to simulate a blank disk and then overwritten directly on the recorded data area, There is a recording method of recording information after erasing (erasing) information on the entire surface of the CD-RW optical disk. Which recording method is used to perform repetitive recording is selected by the user from a recording application.

[0005]

In general, it is better to erase the entire surface of a CD-RW optical disc before recording.
It is known that the recording quality is higher than the case where new data is directly overwritten (overwritten) on old data on an RW optical disc, and is particularly remarkable in high-speed recording. ,
JP-A-5-94621, JP-A-5-334677
Reference).

However, it is often troublesome and burdensome for a user to temporarily erase the entire surface of a CD-RW optical disk by setting an erase mode before rewriting data.

Accordingly, the present invention solves these problems and provides an information recording apparatus capable of obtaining a reliable recording information quality without inconvenience to a user and unnecessary processing time. The purpose is to do.

[0008]

According to the first aspect of the present invention,
A light source for irradiating a rewritable recording medium with light for recording or erasing, and an overwrite recording unit for irradiating recording light with the light source on a recorded area of the recording medium to perform overwrite recording; Recording means for irradiating light for erasing by the light source to the recorded area of the recording medium for erasing and then irradiating light for recording to perform recording, and recording by the overwriting recording means. Recording mode selecting means for selecting any one of recording by the recording means after erasing.

Therefore, the overwriting recording means and the post-erasing recording means are selectively provided together, and one of them is selected and recorded by the recording mode selecting means. Therefore, the post-erasing recording means is selected as necessary. By irradiating the recorded area of the recording medium with erasing light from a light source and erasing the recording medium, and then irradiating the recording light to perform recording, it is possible to obtain highly reliable recording information quality. In particular, in a case where the recording quality is not deteriorated, by selecting the overwriting recording means and performing the overwriting recording, the recording can be performed without spending more processing time than necessary.

According to a second aspect of the present invention, in the information recording apparatus of the first aspect, a recording speed of two or more stages is selectable, and the recording mode selecting means is provided when a low recording speed is selected. The recording by the overwriting recording means is selected, and when the high-speed recording speed is selected, the recording by the post-erasing recording means is selected.

Therefore, the recording quality can be ensured by automatically selecting the recording by the recording means after erasure, especially at the time of recording at a high recording speed in which the recording quality is apt to be deteriorated. At the time of recording at a low recording speed, by selecting the overwriting recording means and performing the overwriting recording, the recording can be performed without spending more processing time than necessary.

According to a third aspect of the present invention, in the information recording apparatus according to the first or second aspect, the CLV recording mode and the CAV
A recording mode, wherein the recording mode selecting means selects the recording by the overwriting recording means when the CLV recording mode is selected, and the recording after erasing when the CAV recording mode is selected. This is a means for selecting recording by means.

Therefore, when recording in the CAV recording mode in which the linear velocity is increased and the recording quality is apt to be reduced, the recording quality can be secured by automatically selecting the recording by the recording means after erasure, while the linear velocity can be ensured. When recording is performed in the CLV recording mode where the recording quality is not particularly deteriorated and the recording quality is not deteriorated, by performing the overwriting recording by selecting the overwriting recording means, the recording can be performed without spending more processing time than necessary.

The invention described in claim 4 is the first to third aspects of the present invention.
In the information recording device according to any one of the above, further comprising a data amount measuring means for measuring the data capacity to be recorded, the recording means after erasure is a recorded area of the data capacity measured by the data amount measuring means Is a means for recording the data capacity after erasing the data.

Therefore, when recording is performed by the recording means after erasure, the data capacity to be recorded is measured, and the data in the recorded area is erased by the data capacity, and then the recording for the data capacity is performed. Reliable recorded information quality can be obtained by minimizing the time required for erasure.

[0016] The invention according to claim 5 provides the invention according to claims 1 to 4.
In the information recording apparatus according to any one of the above, the erasing speed of the recording means after erasing is set higher than the recording speed.

Therefore, in performing recording by the recording means after erasure, the erasing speed is faster than the recording speed, so that the processing time can be reduced.

The invention according to claim 6 is the invention according to claims 1 to 5
In the information recording device according to any one of the above, the recording medium is a phase change recording medium.

Therefore, when a typical phase-change type recording medium is used as a rewritable recording medium, claims 1 to 5 can be used.
The operation and effect of the described information recording device can be obtained.

[0020]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. FIG. 1 is a schematic block diagram showing a configuration example of a CD-RW drive device which is an optical information recording device of the present embodiment.

First, there is provided a spindle motor 2 for rotating an optical disk 1 of a phase-change type optical disk which is a recording medium loaded in a drive device. The rotation of the spindle motor 2 is controlled by the CLV / CAV controller 3 so that the linear velocity is constant (CLV) or the angular velocity is constant (CAV). Further, an optical pickup 4 having a semiconductor laser, an objective lens, a light receiving element and the like as a light source for condensing and irradiating a recording, reproducing or erasing light beam on the optical disk 1 is provided in a radial direction of the optical disk 1. The seek is provided to be movable. An LD driver 5 is connected to the semiconductor laser of the optical pickup 4, and the write information is EFM (Eight-Fourteen).
(Modulation) The semiconductor laser is modulated and driven by an input through the encoder 6 to perform a writing operation. Here, the optical pickup 4, the LD driver 5, and the EFM encoder 6 constitute a recording unit 7.

A servo controller 8 for performing servo control on the objective lens using a focusing / tracking servo signal obtained from a light receiving element in the optical pickup 4 is provided.

On the other hand, an RF circuit 9 for performing a reproducing operation on the optical disk 1 and outputting an RF signal based on a light receiving element in the optical pickup 4 is provided. An EFM decoder 10 for decoding the RF signal is connected to the RF circuit 9.

A system controller 11 having a CPU and the like for controlling these units 7 to 10 is provided. An operation unit 12 for performing various mode settings and the like is connected to the system controller 11.

Here, in the present embodiment, by switching the operation of the recording means 7 under the control of the system controller 11, the functions of the overwriting recording means and the post-erasing recording means are selectively executed. Is configured. The overwrite recording means is a means for irradiating recording light with a semiconductor laser to a recorded area of the optical disc 1 to perform overwriting, and the recording means after erasing is performed on the recorded area (entire surface) of the optical disc 1. On the other hand, it is a means for irradiating light for erasing with a semiconductor laser to perform erasing and then irradiating light for recording to perform recording. Further, in the present embodiment, the operation unit 12 functions as a recording mode selection unit for an overwrite mode by the overwrite recording unit and a post-erase recording mode by the post-erase recording unit.

An example of operation control at the time of recording on the recorded optical disk 1 in such a configuration will be described with reference to a schematic flowchart shown in FIG. First, when the recording command is issued and the processing is started, it is determined whether or not the overwriting mode is selected by the operation unit 12 (step S).
1). When the overwrite mode is selected (Y in S1), the overwrite mode is set (S2), and the recording process on the optical disc 1 is performed according to the overwrite mode (S5). That is, the recording area of the optical disc 1 is irradiated with the recording light by the semiconductor laser to perform the overwrite recording as it is. The processing of these steps S2 and S5 is executed as a function of the overwriting recording means.

On the other hand, when the overwriting mode is not selected by the operation unit 12 (N in S1), the recording mode is set to the erasing mode (S3), and the entire surface of the optical disk 1 is DC-erased (S4). The recording process on the optical disc 1 is performed according to the post-recording mode (S5). That is, the recorded area (entire surface) of the optical disc 1 is irradiated with erasing light by the erase power Pe by the semiconductor laser to erase the data, and then the recording light is irradiated to perform recording. The processing of steps S3 to S5 is executed as a function of the recording means after erasure. In the post-erase recording mode,
Processing time is longer than in the overwrite mode, but high recording quality is obtained.

As described above, according to the present embodiment, the overwrite recording mode by the overwrite recording means and the post-erase recording mode by the post-erase recording means are selectively combined, and any one of the modes is selected by the recording mode selecting means. Is selected and recorded, so that the post-erase recording mode is selected as necessary, and the recorded area of the optical disc 1 is irradiated with the light for erasing by the semiconductor laser using the semiconductor laser, and the erasing light is then recorded. By irradiating and recording, it is possible to obtain highly reliable recording information quality, but in particular, in a case where the recording quality does not deteriorate, by selecting the overwriting recording mode and performing the overwriting recording, Recording can be performed without spending more processing time than necessary.

A second embodiment of the present invention will be described with reference to FIG. The same portions as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted (the same applies to each of the following embodiments). This embodiment shows an example in which the present invention is applied to a CD-RW drive device in which a plurality of recording speeds can be freely selected.

An example of operation control at the time of recording on the recorded optical disk 1 in the case of the present embodiment will be described with reference to a schematic flowchart shown in FIG. First, when the recording command is issued and the processing is started, the recording speed is set according to the recording speed selected by the operation unit 12 (S11). When the recording speed is set, it is determined whether or not the recording speed is a high recording speed (S12). If the recording mode based on the high-speed recording speed is selectively set (Y in S12), after setting the high-speed recording speed (S13), the recording mode is set to the post-erasing recording mode (S14), and the entire surface of the optical disc 1 is set. After the DC erasure (S15), the recording process on the optical disc 1 is performed according to the post-erase recording mode (S18). That is, in the case of the optical disk 1 using a phase-change recording medium, the recording quality tends to decrease as the recording speed increases, so that the recorded area (entire surface) of the optical disk 1 is erased by the erase power Pe using a semiconductor laser. After erasing by irradiating this light, recording light is irradiated to perform recording. Step S1
The process 2 is executed as a function of the recording mode selection means. Further, the processing of steps S14 to S15 and S18 is executed as a function of the recording means after erasure. According to the post-erase recording mode, processing time is longer than in the overwriting mode, but high recording quality can be obtained.

On the other hand, if the recording mode at the high recording speed is not selected and set (N of S12), after setting the low recording speed (S16), the overwriting mode is set (S17), and the overwriting recording is performed. The recording process on the optical disc 1 is performed according to the mode (S18). That is, the optical disk 1
Is irradiated with recording light by a semiconductor laser to the already recorded area, and overwrite recording is performed as it is. The processing of these steps S17 and S18 is executed as a function of the overwriting recording means. In the case of a low recording speed, even if recording is performed in the overwrite recording mode, no special decrease in the recording quality is observed, so that the processing time can be reduced while maintaining the recording quality.

As described above, according to the present embodiment, the recording quality can be ensured by automatically selecting the recording in the post-erase recording mode, especially at the time of recording at a high recording speed at which the recording quality tends to deteriorate. On the other hand, at the time of recording at a low recording speed that does not cause deterioration of the recording quality, by selecting the overwrite recording mode and performing the overwrite recording, it is possible to perform the recording without spending more processing time than necessary.

A third embodiment of the present invention will be described with reference to FIG. The same portions as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. This embodiment shows an example of application to a CD-RW drive device in which a CLV recording method or a CAV recording method can be selected as a recording mode.

CLV (Constant Linear Velocity)
The recording method is a mode in which writing is performed while controlling the CLV / CAV controller 3 so that the linear velocity of the optical disc 1 becomes constant during data recording. CAV (Constan
t Angular Velocity recording method means that the angular velocity (the number of rotations) of the optical disc 1 becomes constant during data recording.
This is a mode in which writing is performed while controlling the LV / CAV controller 3. The linear velocity increases as the recording area goes to the outer periphery of the optical disc 1. As a result, the recording processing time for the optical disk 1 is shorter in the CAV recording method than in the CLV recording method, but the recording quality may be degraded.

Under such a premise, an example of operation control at the time of recording on the recorded optical disk 1 in the case of the present embodiment will be described with reference to a schematic flowchart shown in FIG.
First, when a recording command is issued and the process is started, selection of a recording mode is waited (S21). Then, it is determined whether or not the selected recording mode is the CAV recording mode (S
22). If the recording mode is the CAV recording mode (Y in S22), the recording mode is set to the CAV recording mode (S23), and the recording mode is set after erasing (S24). After the entire surface of the optical disc 1 is DC-erased (S25). The recording process is performed on the optical disc 1 in accordance with the post-erase recording mode (S2).
8). That is, in the case of recording in the CAV recording mode, the recording quality tends to decrease as the recording speed increases. Therefore, the erasure of the recorded area (entire surface) of the optical disc 1 with the erase power Pe by the semiconductor laser is performed. After erasing by irradiating this light, recording light is irradiated to perform recording. The process of step S22 is executed as a function of the recording mode selection unit. Step S2
Steps S4 to S25 and S28 are executed as a function of the post-erase recording means. According to the post-erase recording mode,
Processing time is longer than in the overwrite mode, but high recording quality is obtained.

On the other hand, if the CAV recording mode is not selected and set (N in S22), the recording method is CLV
After setting the recording method (S26), the mode is set to the overwrite mode (S27), and the recording process on the optical disc 1 is performed according to the overwrite mode (S28). That is, the recording area of the optical disc 1 is irradiated with the recording light by the semiconductor laser to perform the overwrite recording as it is. The processing of these steps S27 and S28 is executed as a function of the overwriting recording means. In the case of the CLV recording method,
Since the linear velocity is always constant, there is no special decrease in recording quality even when recording in the overwrite recording mode.
Processing time can be reduced while maintaining recording quality.

A fourth embodiment of the present invention will be described with reference to FIG. In the present embodiment, the recording speed in a plurality of stages can be selected, and the CLV recording method and the CA
An example of application to a CD-RW drive device in which the V recording method can be selected will be described.

An operation control example during recording on the recorded optical disk 1 in the case of the present embodiment will be described with reference to a schematic flowchart shown in FIG. First, when the recording command is issued and the processing is started, the recording speed is set according to the recording speed selected by the operation unit 12 (S31). After the recording speed is set, it is determined whether or not the recording speed is the high recording speed (S32). If the recording mode based on the high-speed recording speed is selected and set (Y in S32), after setting the high-speed recording speed (S33), it is determined whether or not the selected recording mode is the CAV recording mode. Yes (S3
4). If the mode is the CAV recording mode (Y in S34), the recording mode is set to the post-erasing recording mode (S35). After the entire surface of the optical disc 1 is DC-erased (S36), the recording process on the optical disc 1 is performed according to the post-erasing recording mode (S43). ). That is, in the case of recording at a high recording speed and in the CAV recording mode, the recording quality tends to be degraded as the recording speed is particularly increased. Then, after erasing by erasing light with erase power Pe and erasing, recording light is irradiated to perform recording. Step S34
Is executed as a function of the recording mode selecting means. Further, the processing of steps S35 to S36 and S43 is executed as a function of the recording means after erasure. According to the post-erase recording mode, processing time is longer than in the overwriting mode, but high recording quality can be obtained.

If the CAV recording mode is not selected and set (N of S34), the overwriting mode is set according to the CLV recording mode (S37), and the recording process on the optical disc 1 is performed according to the overwriting recording mode (S4).
3). That is, the recording area of the optical disc 1 is irradiated with the recording light by the semiconductor laser to perform the overwrite recording as it is. The processing of these steps S37 and S43 is executed as a function of the overwriting recording means.

On the other hand, if it is determined in step S32 that the recording mode with the high recording speed has not been selected and set, the low recording speed is set (S38), and the selected recording mode is set to the CAV recording mode. It is determined whether or not there is (S39). In the CAV recording mode (S3
9), a post-erase recording mode is set (S40), and after the entire surface of the optical disc 1 is DC-erased (S41), a recording process on the optical disc 1 is performed according to the post-erase recording mode (S43). That is, recording at a low recording speed and C
In the case of the AV recording mode, the recording quality tends to decrease as the recording speed becomes particularly high. Therefore, the erasing light with the erase power Pe is applied to the recorded area (entire surface) of the optical disk 1 by the semiconductor laser. After irradiating and erasing, recording is performed by irradiating light for recording.
The process of step S39 is executed as a function of the recording mode selection unit. Further, the processing of steps S40 to S41 and S43 is executed as a function of the recording means after erasure. According to the post-erase recording mode, processing time is longer than in the overwriting mode, but high recording quality can be obtained.

If the CAV recording mode is not selected and set (N in S39), the overwriting mode is set according to the CLV recording mode (S42), and the recording process on the optical disc 1 is performed according to the overwriting recording mode (S4).
3). That is, the recording area of the optical disc 1 is irradiated with the recording light by the semiconductor laser to perform the overwrite recording as it is. The processing of these steps S42 and S43 is executed as a function of the overwriting recording means. In the case of the low-speed recording speed and the CLV recording mode, even if recording is performed in the overwrite recording mode, no special decrease in the recording quality is observed, so that the processing time can be reduced while maintaining the recording quality. .

A fifth embodiment of the present invention will be described with reference to FIG. The present embodiment shows an example of application to a CD-RW drive device having a function of a data capacity measuring unit for measuring the data capacity to be recorded. As an example, a recording mode as in the third embodiment is used. An example of application to a CD-RW drive device in which the CLV recording method and the CAV recording method can be freely selected will be described.

An example of operation control at the time of recording on the recorded optical disk 1 in the case of the present embodiment will be described with reference to a schematic flowchart shown in FIG. First, when a recording command is issued and the processing is started, selection of a recording mode is waited (S
51). Then, it is determined whether or not the selected recording mode is the CAV recording mode (S52). If the recording mode is the CAV recording mode (Y in S52), the recording mode is set to the CAV recording mode (S53), and the recording mode is set to the post-erasing recording mode (S54). Here, in the present embodiment, the data capacity to be newly written is measured based on the counting of the number of data bits and the like (S55). This step S55
Is executed as a function of the data amount measuring means. Thereafter, the data in the recorded area of the data capacity to be written is DC-erased (S56) instead of the entire surface of the optical disk 1, and the recording process on the optical disk 1 is performed according to the post-erasure recording mode (S59). That is, in the case of the above-described third embodiment or the like, as a process in the recording mode after recording, the recorded area (entire surface) of the optical disc 1 is irradiated with erasing light by the erase power Pe by the semiconductor laser. However, according to the present embodiment, only the amount of data to be newly written is erased, so that the time required for the erasing process, and The time required for processing can be reduced.

If the mode is not the CAV recording mode (N in S52), the mode is set to the overwrite mode (S57, S57).
S58).

A sixth embodiment of the present invention will be described with reference to FIG. The present embodiment shows an example of application to a CD-RW drive device having a function of a data capacity measuring unit for measuring the data capacity to be recorded. As an example, a multi-step drive as in the fourth embodiment is shown. An example of application to a CD-RW drive device in which the recording speed is selectable and the recording mode is selectable between the CLV recording method and the CAV recording method is shown.

An operation control example at the time of recording on the recorded optical disc 1 in the case of the present embodiment will be described with reference to a schematic flowchart shown in FIG. First, when the recording command is issued and the processing is started, the recording speed is set according to the recording speed selected by the operation unit 12 (S61). When the recording speed is set, it is determined whether or not the recording speed is the high recording speed (S62). If the recording mode based on the high-speed recording speed is selected and set (Y in S62), after setting the high-speed recording speed (S63), it is determined whether or not the selected recording mode is the CAV recording mode. Yes (S6
4). If the mode is the CAV recording mode (Y in S64), the mode is set to the post-erase recording mode (S65). Here, in the present embodiment, the data capacity to be newly written is measured based on the count of the number of data bits (S66). The process of step S66 is executed as a function of the data amount measuring means. Thereafter, the data of the recorded area of the data capacity to be written is written on the D, not on the entire surface of the optical disc 1.
After C erasing (S67), a recording process is performed on the optical disc 1 in accordance with the post-erasing recording mode (S75). That is, in the case of the above-described fourth embodiment, as a process in the post-recording recording mode, the recorded area (entire surface) of the optical disk 1 is irradiated with erasing light by the erase power Pe by the semiconductor laser. However, according to the present embodiment, only the amount of data to be newly written is erased, so that the time required for the erasing process can be reduced without impairing the function of obtaining high recording quality. Can be reduced to the required minimum.

On the other hand, if it is determined in step S62 that the recording mode at the high recording speed is not selected and set, the low recording speed is set (S69), and the selected recording mode is set to the CAV recording mode. It is determined whether or not there is (S70). In the CAV recording mode (S7
0, Y), and set the recording mode after erasure (S71). Here, in the present embodiment, the data capacity to be newly written is measured based on the number of data bits or the like (S
72). The process of step S72 is executed as a function of the data amount measuring means. After that, the data in the recorded area corresponding to the data capacity to be written is DC-erased (S73) instead of the entire surface of the optical disk 1, and then the recording process on the optical disk 1 is performed according to the post-erasure recording mode (S7).
5). That is, in the case of the above-described fourth embodiment, as a process in the post-recording recording mode, the recorded area (entire surface) of the optical disk 1 is irradiated with erasing light by the erase power Pe by the semiconductor laser. However, according to the present embodiment, only the amount of data to be newly written is erased, so that the time required for the erasing process can be reduced without impairing the function of obtaining high recording quality. Can be reduced to the required minimum.

In any case, if the mode is not the CAV recording mode (N in S64, N in S70), the overwriting mode is set (S68, S74).

Although not particularly shown, in any of the embodiments, when performing the recording process in the post-erase recording mode, the speed control is performed so that the erasing speed is higher than the recording speed at that time. By doing so, it is possible to shorten the processing time of the post-erase recording mode, which originally takes longer processing time than the overwrite recording mode.

[0050]

According to the first aspect of the present invention, the overwriting recording means and the after-erasing recording means are selectively provided together, and one of them is selected and recorded by the recording mode selecting means. By selecting the recording means after erasing as necessary and irradiating the erasing light with a light source to the recorded area of the recording medium and erasing it after erasing, the recording is performed by irradiating the recording light, thereby providing a reliable recording. In particular, in the case where the recording quality is not deteriorated, by selecting the overwriting recording means and performing the overwriting recording, the recording can be performed without taking unnecessary processing time. be able to.

According to the second aspect of the present invention, in the information recording apparatus according to the first aspect, particularly, at the time of recording at a high recording speed in which the recording quality is apt to be deteriorated, the recording by the recording means after erasing is automatically selected. In addition, while ensuring the recording quality, especially when recording at a low recording speed that does not cause deterioration of the recording quality, by selecting the overwriting recording means and performing the overwriting recording, the recording can be performed without taking unnecessary processing time. Can be performed.

According to the third aspect of the present invention, in the information recording apparatus according to the first or second aspect, when the recording is performed in the CAV recording mode in which the linear velocity is increased and the recording quality is apt to be deteriorated, the recording by the erasing recording means is performed. By automatically selecting, the recording quality can be ensured, but at the time of recording in the CLV recording mode in which the linear velocity is constant and the recording quality does not particularly deteriorate, the overwriting recording means is selected to perform the overwriting recording. Thus, recording can be performed without taking unnecessary processing time.

According to the fourth aspect of the present invention, in the information recording apparatus according to any one of the first to third aspects, when recording by the recording means after erasure, the data capacity to be recorded is measured. By erasing the data in the recorded area for the data capacity and then performing the recording for the data capacity, it is possible to minimize the time required for erasure and obtain a reliable recording information quality.

According to the fifth aspect of the present invention, in the information recording apparatus according to any one of the first to fourth aspects, when performing recording by the recording means after erasing, the erasing speed is higher than the recording speed. Since it is fast, the processing time can be reduced.

According to the sixth aspect of the invention, the effects of the first to fifth aspects can be obtained when a typical phase-change type recording medium is used as a rewritable recording medium.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an information recording device according to a first embodiment of the present invention.

FIG. 2 is a schematic flowchart showing an example of the recording process control.

FIG. 3 is a schematic flowchart illustrating a recording process control example according to a second embodiment of the present invention.

FIG. 4 is a schematic flowchart illustrating an example of a recording process control according to a third embodiment of the present invention.

FIG. 5 is a schematic flowchart illustrating an example of recording processing control according to a fourth embodiment of the present invention.

FIG. 6 is a schematic flowchart illustrating an example of recording processing control according to a fifth embodiment of the present invention.

FIG. 7 is a schematic flowchart illustrating an example of recording processing control according to a sixth embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a recording waveform example, a recording state, and the like on a CD-RW optical disc.

[Explanation of symbols]

 1 rewritable recording medium S1 recording mode selecting means S2, S5 overwriting recording means S3 to S5 erasing recording means S12 recording mode selecting means S14, S15, S18 erasing recording means S17, S18 overwriting recording means S22 recording mode selecting means S24 , S25, S28 Erasing recording means S27, S28 Overwriting recording means S32, S34 Recording mode selecting means S35, S36, S43 Erasing recording means S37, S43 Overwriting recording means S39 Recording mode selecting means S40, S41, S43 Erasing recording means S42, S43 Overwriting recording means S52 Recording mode selecting means S54, S56, S59 Erasing recording means S55 Data amount measuring means S58, S59 Overwriting recording means S62, S64 Recording mode selecting means S65, S67, S75 Erasing recording means S66 Over data amount measuring means S68, S75 overwrite recording means S70 recording mode selecting means S71, S73, S75 erased after recording means S72 data amount measuring means S74, S75 overwrite recording means

Claims (6)

[Claims] 1. A light source for irradiating recording or erasing light to a rewritable recording medium, and recording light is irradiated from a light source to a recorded area of the recording medium to perform overwrite recording. Overwriting recording means for erasing, erasing the recording area of the recording medium by irradiating light for erasing with the light source, erasing the recording light, and then performing recording by irradiating light for recording, and the overwriting. Recording mode selecting means for selecting any of recording by the recording means and recording by the after-erasure recording means,
An information recording device comprising: 2. The recording mode selection means has two or more recording speeds selectable, and the recording mode selection means selects the recording by the overwriting recording means when the low-speed recording speed is selected, and selects the high-speed recording speed. 2. The information recording apparatus according to claim 1, wherein the recording means selects the recording by the recording means after erasing in a case where the data is erased. 3. A CLV recording mode and a CAV recording mode are freely selectable. The recording mode selecting means selects recording by the overwriting recording means when the CLV recording mode is selected, and sets the CAV recording mode. 3. The information recording apparatus according to claim 1, wherein when the selection is made, the recording by the recording means after erasing is selected. 4. A data amount measuring means for measuring a data capacity to be recorded, wherein the post-erasing recording means erases data in a recorded area corresponding to the data capacity measured by the data amount measuring means, and thereafter erases the data. 4. The information recording device according to claim 1, wherein the information recording device is a means for recording the data amount. 5. The post-erasing recording means wherein the erasing speed is set higher than the recording speed.
The information recording device according to any one of the above. 6. The information recording apparatus according to claim 1, wherein the recording medium is a phase change recording medium.