JP2003030844A - Optical disk information recorder and optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To visually discriminate the information of an optical disk recording state without playing the disk. SOLUTION: A part of a track is irradiated with a recording optical beam by an optical beam irradiation means to form an optical mark to be visible. The optical mark indicates information regarding the recording state of an optical disk, and includes, for example finalization information indicating the impossibility of additional recording on the optical disk, recording permission information indicating the possibility of additional recording on the optical disk, information regarding the residual capacity of the optical disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc information recording apparatus capable of recording information on an optical disc and an optical disc used for the same, and in particular, information on the recording state of the optical disc can be visually discriminated on the recording surface of the optical disc. It relates to a possible configuration.

[0002]

2. Description of the Related Art Conventionally, a CD (Compact Disk) is used as a read-only medium in which data including an information signal related to the music information is mainly recorded, and video information is recorded in addition to the above data. A DVD (Digital Versatile Disk) is known as a read-only medium. In recent years, a write-once CD (CD-CD) that allows additional writing of information while adopting the same format as this CD or DVD
R: Recordable Compact Disk), recordable DVD (DVD-
R: Recordable Digital Versatile Disk) has been developed. Among them, the CD-R has become popular as an inexpensive data backup medium or as a large-capacity data storage for music, images, etc., along with the spread of personal computers. Like the CD-R, the DVD-R is also widely used as a large-capacity storage medium.

In the following description, the CD-R will be described as a specific example, but the DVD-R is substantially the same and is not limited to the CD-R medium. FIG. 2 shows such a CD-R
Shows the physical format of. The CD-R8 has a hole portion 1, a clamp portion 2,
PCA (Power Calibration Area) section 3, PMA (Program
A memory area) section 4, a lead-in section 5, a Program section 6, and a lead-out section 7 are provided. A guide groove is formed on the recording track of the CD-R. This guide groove is 22.05K.
Wobbling is formed by a signal of a frequency obtained by FM-modulating a carrier wave of Hz with data indicating absolute time information. The laser beam controls tracking along the guide groove, and the center frequency of the wobbling signal is 22.05K.
By controlling the rotation speed of the spindle motor so that the frequency becomes Hz, tracking control and spindle control can be performed even on an unrecorded optical disc. PCA3
In order to properly adjust the laser output during recording,
An area in which trial recording is performed prior to recording,
The A3 section is composed of test blocks divided into a plurality of areas, and one test recording consumes one of the test blocks. The area of the test block once test recorded cannot be used for the next test recording, so
The unused test block is searched, and the trial recording is performed every time the CD-R is mounted in the optical disk recording device. PM
The A section 4 is an area for recording the management information of the information signal recorded in the program section 6, and the start address and end address of the track number for the information signal recorded in the program section 6 are recorded therein.

Further, in the case where additional recording is performed on the partially recorded optical disk, the information signal is continuously recorded in the residual program section 6, and therefore, until the final recording completion instruction (finalizing process) is issued. Since the management information cannot be recorded in the lead-in section 5, it is necessary to record the temporary management information of the program section 6, and the PMA section 4 is provided.

On the other hand, in order to bring the CD-R 8 into a recording completed state in which additional recording is not permitted, the finalizing process is executed. For the finalizing process, P
The management information of the MA unit 4 is recorded a plurality of times, and the lead-out signal is recorded in the lead-out unit 7. By performing these finalizing processes, the CD-R 8 becomes a read-only disc conforming to the CD format.

The write-once type optical discs are roughly classified into format formats in terms of usability, and there are a disc-at-once recording method and a track-at-once recording method.

Reference numerals 9-b and 9-c in FIG. 8 show a disc-at-once recording format configuration diagram. The disc-at-once recording method uses only one session 205 in the medium.
Is allowed to record, and track 1 in track 2
07, second track 208, third track 209, fourth
A data group of the track 210 exists. A session indicates a recording unit processed for one media recording.

The disadvantage of the disc-at-once recording method is that there are few cases where data corresponding to the capacity of one optical disk is always prepared for one recording of the optical disk, and additional recording is performed while leaving a large remaining capacity. It is a read-only optical disc that cannot be recorded. On the contrary, the advantage is
The completed optical disc can be handled in the same format as a conventional read-only CD.

On the other hand, a track-at-once recording format example is shown at 9-a in FIG. Track-at-once recording is a method of performing additional recording for each session. However, a multi-session recorded optical disc including a plurality of these session groups (first session 200 to fourth session 204) is a multi-session reproducing means. It can be said that data can be read only by a reproducing device equipped with. The track-at-once recording method recorded in the multi-session is changed in the same manner as the disc-at-once recording by performing the finalizing process, and the data can be read by any reproducing apparatus.

[0010]

However, particularly in the case of a bare disc in which the disc is not contained in the case such as the above-mentioned optical disc (bare disc), the state in which additional writing is permitted and the remaining recording capacity at which additional writing is possible are possible. In order for the user to know the unique information such as the information on the optical disc, the finalized state, etc., the optical disc reproducing device obtains an information signal from the optical disc, and then the reproducing device confirms the recording state of the optical disc. I had to do it. For that purpose, a lot of time is required because it takes time to replace the optical disc, time to play the optical disc, and time to determine the state of the optical disc.

In addition, characters may be temporarily written on the surface of the optical disk by using an oil-based marker or the like for the user's memorandum. But the note
It is not necessary at the time of finalization, and the title name of the optical disk is written again after erasing the memorandum characters with volatile oil or the like, making the index writing method on the optical disk unusable.

At least, the user often wants to immediately know the status information of the optical disk such as whether the optical disk is in a state in which additional recording is permitted, in a finalized state, or how much remaining recording capacity can be additionally recorded. .

[0013]

In order to solve this problem, an optical disk information recording apparatus of the present invention records information on a recordable optical disk having a plurality of concentric or spiral tracks. An optical disk rotating means for rotating the optical disk, a light beam irradiating means for irradiating the optical disk with a recording light beam, and a light beam control means for controlling irradiation of the light beam irradiating means. , A part of the plurality of tracks is irradiated with a recording light beam to form a visible optical mark. Here, the optical mark indicates information related to the recording state of the optical disc. This information includes finalization information indicating that additional recording cannot be performed on the optical disc, recording permission information indicating the possibility of additional recording on the optical disc, and information about the remaining recording capacity of the optical disc. Including etc.

Further, the optical disc of the present invention is a recording type optical disc having a plurality of concentric or spiral tracks, and information is recorded on a plurality of tracks by a light beam and a part of the tracks is recorded. Is
Optical marks are formed that are visible by the light beam.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a first embodiment of an optical disc recording and reproducing apparatus according to the present invention. Data to be recorded or reproduced on / from the optical disc is input / output from an interface unit 23 which receives the data from, for example, a personal computer (PC). An encoder unit 27 receives the recording data input from the interface unit 23, generates a modulated and encoded recording signal, and stores it in the memory 24. The data stored in the memory 24 is given to the laser driver 26 via the encoder unit 27 according to the data read command of the CPU 20. The laser driver 26 causes the laser emitting section 16 to emit recording laser light in response to a drive signal from the laser driver 26.

The optical path of the recording laser light is changed by the prism 17, the spot shape of the recording laser light is narrowed by the lens 14, and the recording laser light is irradiated onto the optical disk 9 to operate to record data. The laser pickup unit 13 is an actuator 1 for focus and tracking control of a recording laser.
5, a lens 14, a prism 17, a laser emitting section 16, and a laser receiving section 17.

The recording data is modulated into laser light and output from the laser emitting section 16. The optical path of the laser light is changed by the prism unit 17, the laser spot is narrowed down by the lens 14 onto the surface of the optical disk 9, and the sector 5
Recording is performed sequentially from the innermost track of the optical disc toward the outer track along the track 51 in units of 0.

On the other hand, the laser light reflected by the optical disk 9 is received by the light receiving element 18, is photo-electrically converted, and is input to the servo section 19. The servo unit 19 generates a tracking signal and a focus signal from the reflected light of the recording laser beam, and the seek actuator 1 that moves the focus and tracking control actuator 15 and the laser pickup unit 13 in the radial direction of the optical disc.
1. The spindle motor 10 is controlled to guide the recording laser beam to the target sector in the track.

On the other hand, in the reproducing system, the laser light reflected from the optical disk 9 is photo-electrically converted by the light receiving element 18.
The analog signal processing unit (ASP unit) 21 performs amplification, signal equalization processing, and demodulation processing, and the decoder unit 22 performs error correction processing and decoding processing, and sends it to the interface unit 23.

FIG. 4 is a diagram for explaining the medium format of the optical disc used in the present invention. The optical disk 8 has tracks 51 formed concentrically or spirally.
1 is divided into a plurality of sectors 50. Each sector is
Sector addresses are assigned to the respective sectors, and data is recorded or reproduced by using the sector as a minimum unit.

The optical disk 8 is at least 1 from the innermost circumference.
First area 55 composed of more than one track
Is a lead-in section in which management information of the optical disc is recorded during the above-mentioned finalizing process, and a PMA in which temporary management information until the finalizing process is recorded.
And a PCA section in a test recording area for initial adjustment of laser output during recording.

The second area 54, which is the most demanded optical disk area of the present invention, is an area for recording visible marking, and is composed of at least one track. For marking with a laser, for example, the number of tracks corresponding to a width of 1 mm in the radial direction of the optical disc is secured. Since the track width varies depending on the recording format of the optical disc, the number of tracks in the second area cannot be limited. At least ensure an optically visible marking area. In the present application, for convenience of description, 100 tracks will be described below as a marking portion.

The third area 53 is a portion in which data is recorded, and the fourth area 52 is a portion in which a lead-out signal is recorded during the finalizing process.

The write-once optical disc described in the present embodiment is mainly a write-once optical disc such as a DVD-R or a CD-R, but is not limited to the write-once optical disc. There is no problem even if the optical disc is an overwrite-writable optical disc. For convenience of explanation, a CD-R will be described here as an example, but the present invention is not limited to the CD-R.

The structure of the write-once type optical disc is, as in the optical disc shown in FIG. 4, formed on a track formed in a spiral shape or a concentric shape with a guide groove for tracking to form a disc substrate and a reflective layer. An organic dye layer peculiar to the write-once type is sandwiched between them as a recording layer.

When the recording laser irradiates the recording layer with the first laser power, the organic dye layer undergoes a thermal change, and the reflectance is made lower than that before recording, so that a pit row of data is formed. To form. During playback, the first
The second laser power having a value lower than the laser power of 1 is applied to the optical disc, and the digital signal is read by the presence or absence of the recording bit by the laser reflected light from the optical disc as the change of the reflectance.

In the present embodiment, the effect of the present invention becomes more effective as the reflectance of the organic dye before and after the laser recording greatly changes. In particular, deep blue and deep green types are effective as the colors of the organic pigments, and the difference in reflectance is remarkable even in the visual state.

As described above, write-once type optical discs such as CD-Rs include the disc-at-once recording system in which the recording is completed once and the track-at-once recording system in which additional recording is possible. However, in many cases, the data size corresponding to one optical disk is rarely prepared at one time, and the track-at-once recording method in which recording is additionally performed in multiple times is often used.

Since the write-once type optical disc is often supplied in a bare state, it is recorded in a state where the optical disc is recorded, for example, the disc is finalized and cannot be additionally recorded, or is in a state before finalization. If there is, or if it is possible to write additionally, what percentage of the remaining recording capacity cannot be determined unless the target optical disc is reproduced and the data is read from the optical disc. In addition, it takes about several minutes to set up the optical disc in a reproducible state, which is inconvenient. According to this embodiment, the recording state of the above-mentioned optical disc can be determined without reproducing the optical disc.

FIG. 5 shows an optical disc in the middle of additional recording by the recording apparatus of the present application. For example, FIG. 5 shows a recorded portion, that is, a portion where the reflectance of the organic dye layer is lowered by the laser beam, in a shaded manner. The first area 55 is a state where PMA and PCA are partially used for recording. On the other hand, the second region 54 is the mark portion of the present embodiment, and in the drawing, this region is not irradiated with the recording laser light and shows an unrecorded state. Third area 53
Indicates that about 70% of the data area is used for recording. The fourth area 52 shows a recording state in which the finalizing process is not performed.

Like the above-mentioned optical disc, the remaining recording capacity 30
In the state of%, the recording condition of the disc, for example, a numerical description of the remaining recording space capacity, or a notation that additional recording is possible, that is, notation that finalization processing is not performed, is written in the character index column such as the back of the disc of the optical disc. It is difficult to write and erase easily with a general-purpose writing instrument. In this embodiment, the fact that the reflectance of the recorded portion and the unrecorded portion of the recording surface of the optical disc can be visually discriminated is utilized. The present invention is not limited to the data recording operation on the optical disk, but is formed on the optical disk as a visible marking by utilizing the phenomenon of different reflectances.

For example, it can be roughly estimated that about 70% of the data is recorded on the optical disk shown in FIG. 5 by looking at the partial ratios where the reflectance of the data recording surface is different. However, it is impossible to judge whether or not the optical disc can be additionally recorded by only visually observing the optical disc. Therefore, in the present embodiment, for example, as shown in FIG. 5, a marking area is provided in the second area 54, and when this area is not recorded, that is, a portion whose reflectance is higher than a recorded portion is present. When it exists, it indicates that additional recording is possible, and by visually observing the recording surface of the optical disc, a ring-shaped visible mark appears floating near the innermost circumference.

On the other hand, when the finalizing process is performed, for example, invalid data is recorded in the marking area.
Alternatively, the data of the last block of the data is recorded. Therefore, for a finalized optical disc,
It can be visually observed in a state where the marking (ring-shaped visible mark) is lost.

The above process will be described with reference to FIG. The terminal 29 is a terminal for inputting a finalize instruction,
A finalize instruction is not input in the replenishment recording such as the track-at-once recording or the packet write recording. The recording operation in this case is as follows:
Starting from the third area of the optical disc. In the conventional optical disc, recording is performed from the second area of the optical disc.
In this embodiment, the head sector number is recorded in the PMA section so that recording can be performed from the track number and sector corresponding to the third area. Subsequently, the servo unit 19 controls the laser unit unit 13 so as to position the seek actuator mechanism 12 and the seek actuator 11 so as to correspond to the optical disc radius of the sector, and performs recording on the optical disc by the above-described recording operation. The most characteristic feature of the above operation is that recording is performed from the third area without recording the second area.

When a finalize instruction is input from the terminal 29, the finalize processing section 28 causes the CPU 20 to
To the CPU2
0 issues a command to record the lead-in part and the lead-out part of the area 1 of the optical disc, and further to record, for example, invalid data in the mark part of the second area. The data recorded in the mark portion is not limited to invalid data, and any data may be used. Moreover,
The finalize processing unit 28 performs recording on the laser driver unit 26 with a different power, for example, a strong or weak value, from the laser power for recording the mark portion in the second area as compared with the laser power for normal data recording. To instruct. Of course, there is no problem even if the laser power is the same as that of the data area. On the other hand, the laser unit section 13
When receiving a command from the finalize processing unit 28, the seek movement, tracking, and focus actuators are moved so that the seek motor 11 can position the laser spot at a known mark portion. The mark portion of the area 2 does not need to be limited to the portion described in the present embodiment, and any track or track group may be used.

According to the above-described embodiment, by using the predetermined portion of the optical disc as the mark portion, it is possible to visually confirm whether or not the disc has been finalized. Further, although the case where the mark shape of the mark portion is a ring shape has been described, the mark recording is not limited to the description of the present application, and the mark recording may be performed in a broken line shape. Further, in synchronization with the rotation phase of the optical disc, for example, "Fina
Characters such as “size” may be burned onto the optical disc with a recording laser.

The second embodiment will be described below with reference to FIGS. 3 and 7. The present embodiment is a recording device that visually marks the remaining capacity that can be additionally written to the first embodiment on the optical disk surface. In FIG. 3, description of functional blocks having the same reference numerals as those in FIG. 1 is omitted. Here, a case will be described where additional recording is performed by track-at-once recording.

The remaining capacity of the optical disc is detected by the remaining capacity detector 30. When the optical disc is ejected from the recording device (EJECT) without finalizing the optical disc, the finalization processing unit 28 causes the laser driver 26 and the servo unit to record a mark corresponding to an arc corresponding to the capacity in the mark unit. 19, sends a command signal to the CPU 20. For example, when the remaining capacity is 30%, an arc mark whose arc corresponds to 360 × (1-0.3) = 252 deg is recorded.

FIG. 7 shows the mark-recorded optical disc. Unless the finalizing process is performed, the arc portion of the mark portion having a high reflectance can be visually observed in the residual capacity ratio. The mark recording indicating the remaining capacity is not limited to this embodiment, and there is no problem even if the mark recording is performed by another means. Further, the track on which the mark is recorded is not limited to the second block and may be any track or track group.

[0040]

According to the present invention, visible optical marks are formed on an optical disc by irradiating a predetermined number of tracks of the recording type optical disc with a light beam. The optical mark can indicate information related to the recording state of the optical disc, for example, whether or not the finalizing process has been completed or the remaining recording capacity of additional recording, and the recording state of the optical disc can be immediately confirmed without reproducing the disc. Can be visually recognized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical disc information recording apparatus according to a first embodiment of the present invention.

FIG. 2 is a recording format diagram of a CD-R optical disc.

FIG. 3 is a configuration diagram of an optical disc information recording apparatus according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a physical recording format of an optical disc.

5 is an optical disc recorded by the optical disc information recording apparatus of FIG.

6 is an optical disc recorded by the optical disc information recording apparatus of FIG.

7 is an optical disc recorded by the optical disc information recording apparatus of FIG.

FIG. 8 is an explanatory diagram of an additional recording format of an optical disc.

[Explanation of symbols]

9 optical disk medium 10 spindle motor 11 seek actuator 12 seek mechanism 13 laser pickup section 14 lens 15 focus and tracking control actuator 16 laser emitting section 17 prism 18 light receiving element 19 servo section 20 CPU 21 ASP section 22 decoder section 23 interface section 24 memory 25 data bus 26 laser driver section 27 encoder section 28 finalize processing section 29 finalize instruction input terminal 30 remaining amount detecting section 50 sector 51 track

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideo Nishijima             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department F-term (reference) 5D029 PA01                 5D090 AA01 BB03 BB07 CC01 DD03                       DD05 GG17 GG32 GG33 GG34

Claims (10)

[Claims] 1. An optical disc information recording apparatus for recording information on a recordable optical disc having a plurality of concentric or spiral tracks, and an optical disc rotating means for rotating the optical disc and irradiating the optical disc with a recording light beam. A light beam irradiation means and a light beam control means for controlling irradiation of the light beam irradiation means are provided, and the light beam control means is constituted by the light beam irradiation means.
An optical disc information recording apparatus, wherein a part of the plurality of tracks is irradiated with the recording light beam to form a visible optical mark. 2. The optical disc information recording apparatus according to claim 1, wherein the optical mark indicates information related to a recording state of the optical disc. 3. The optical disc information recording apparatus according to claim 1, wherein the optical disc is a write-once type optical disc. 4. The optical disk information recording apparatus according to claim 2, wherein the information related to the recording state of the optical disk is finalization information indicating that additional recording cannot be performed on the optical disk. 5. The optical disc information recording apparatus according to claim 2, wherein the information related to the recording state of the optical disc is recording permission information indicating the possibility of additional recording on the optical disc. . 6. The optical disc information recording apparatus according to claim 2, wherein the information related to the recording state of the optical disc is information of the remaining recording capacity of the optical disc. 7. The optical disc information recording apparatus according to claim 1, wherein the area where the optical mark is formed is a predetermined number of track portions in the information recording area of the optical disc. 8. The optical disc information recording apparatus according to claim 1, wherein the light beam control means sets the light beam intensity for forming the optical mark and the light beam intensity for recording information different from each other. An optical disk information recording device characterized by controlling a light beam irradiation means. 9. A recording-type optical disk having a plurality of concentric or spiral tracks, wherein information is recorded by a light beam on the plurality of tracks and a light beam is formed on a part of the tracks. An optical disc having an optical mark that is visible by the optical disc. 10. The optical disc according to claim 9, wherein the optical mark indicates information related to a recording state of the optical disc.