JPH02185717A - Optical disk and optical disk device - Google Patents

Abstract

PURPOSE:To allow efficient recording even with the same optical device even in the case of optical disks of different recording conditions by compressing the recording information of a management region for each of divided recording regions to execute recording control. CONSTITUTION:The recording conditions of a specific recording region are selected as a reference value and the difference in the recording conditions between each of the respective recording regions exclusive of the selected recording region and the recording region adjacent to this recording region is determined as a differential value. The set of the reference values and the differential values is used as the recording information. Namely, the recording power of the recording region 1 is the recording conditions of the recording power is designated as the reference value P1 and the difference in the recording conditions between the adjacent recording regions as the differential value DELTAPn=Pn+1-Pn (n=1, 2,...9), then P1, DELTAP1, DELTAP2,...DELTAP9 are recorded as recording information in the management region. Since the differential value is smaller by >=1 digits than the reference value, the entire part of the recording information can be compressed by using the differential values. The efficient recording control of the optical disks of the different recording conditions at the compressed information quantity for each of the divided recording regions is possible in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recordable optical disc and an optical disc device corresponding thereto, and particularly relates to an optical disc and an optical disc that can record on optical discs with different recording conditions using the same optical disc device. It is related to the device.

2. Description of the Related Art Most conventional optical disc devices can only handle one type of optical disc.

On the other hand, there are optical discs with different recording media, physical formats of the address section and data section, and even different recording/playback methods, and it is difficult to think of ways to use these various types of optical disks with the same recording/playback device. ing. One method is, for example, to use a control track to set the drive means of an optical disk device, as proposed in the Information Processing Society of Japan Information Standards Study Group 5C23 Control Track At-Hoc Document (10-4). It has been proposed that each optical disc be provided with a management area called . Using this, we are trying to handle a variety of recording media with the same drive. This example will be explained. As shown in FIG. 3, reproducible management information (referred to as control track data) is recorded in advance on a control track 401 on an optical disc 400, and the control track is reproduced when the optical disc is loaded into an optical disc device. Based on the reproduced control data, the optical disc device sets recording and reproduction conditions, and records and reproduces data according to the optical disc in the recording and reproduction area 40.
Execute for 2.

The control data has the setting items shown in Figure 4 as recording information. Each item has a constant value for the entire recording area or a value at two points in the recording area. In the latter case, other than the two points. The value in the recording area will be interpolated by a certain function, and that function will also be a simple one with a low order, such as a linear function.

To solve this problem, the following example can be easily considered. FIG. 5 shows a block diagram of the optical disc device. In FIG. 5, 1 is an optical disc, and 2 is a management area in which management information regarding the optical disc is recorded. The management area will be described in detail later. 3 is a semiconductor laser head for recording and reproducing data on the optical disc 1; To simplify the explanation, the head transport system is omitted.

Reference numeral 4 represents a management information reproducing section for reproducing the management area 2, and reference numeral 5 represents a management information storage section for storing the management information reproduced from the management area 2. Reference numeral 6 denotes a control section that controls the entire optical disk device, and is composed of, for example, a microcomputer. Reference numeral 7 indicates a recording/reproducing drive unit which sets operating conditions for recording and reproducing according to the management information in the management information storage unit 5, drives the head 3 for recording/reproducing, and records/reproduces data; This is a head transfer unit that transfers the head to the area of the head.

A control line 61 of the control JTj unit 60 transmits and receives recording and reproduction control data from a higher-level control device. Reference numeral 9 denotes a recording/reproducing area on the optical disc 1.

In the management area 2, the setting values of the actual recording conditions are discretized for a plurality of recording areas, and recorded in a pre-format format as recording information in a predetermined recording format.For example, as shown in FIG. 6, the actual recording power is When the value is indicated by the dashed-dotted line, divide the entire record tilt into 10 recording areas, take the average value in each recording area, and calculate Pi, P2.・・・・・・P
Discretize with IO.

Then, as shown in FIG. 7, set values PI, P2. ...... Record PIO in order.

The operation of the optical disc and optical disc device configured as described above will be described below.

(a) When the optical disc 1 is loaded into the optical disc device, the data in the management area 2 on the optical disc 1 is reproduced and stored in the management information storage unit. Specifically, the control section 6 sends playback drive data to the recording/playback drive section 7 to put the head 3 into a playback state, and sends the address of the management area to the head transfer section 8 to transfer the head 3. After the reproduction settings for the management area 2 are completed, the management information reproduction section 4 reads out the management information and stores the management information in the management information storage section 5.

(b) When a search command and the address of the area to be recorded are transmitted from the higher-level control device to the control unit 6 through the control line 61, the control unit 6 retrieves the recording information of the management area according to the address from the management information storage unit 5. Find it and set it in the recording/playback drive unit 7. Then, the head 3 is put into a reproducing state, and the address is sent to the head transfer section 8 to transfer the RAD 3. When the target address is reached, recording is performed in the recording/reproducing area 8 from the higher-level control device via the control line 61.

We used recording power as an example of the recording condition, but recording sensitivity and
The recording pulse width can also be treated as recording information.

Problems to be Solved by the Invention However, in the above configuration, recording information must be stored in each divided recording area, and the management area is thick (
However, there was a problem that the recording and reproducing area was small.

In view of this, an object of the present invention is to provide an optical disc and an optical disc device that are capable of recording an optical disc having different recording conditions for each divided recording area.

! 1! Means for Solving the Problems The present invention has different recording conditions for each recording area divided into a plurality of blocks, records recorded information in a management area divided into a first block and a second block, and Recording conditions of a specific recording area are recorded in the block as a reference value, and the second
The block includes, for each recording area other than the specific recording area, an optical disc in which the difference in recording conditions between this recording area and an adjacent recording area is recorded as a difference value, and calculation of the recording conditions of the target recording area of the optical disc. , a holding means for reproducing the management area to read out and hold recorded information; and a reference value when the target recording area is a specific recording area, and a difference value from the specific recording area to the target recording area in other cases; and a control means for adding or subtracting an integrated value of from the reference value to determine recording conditions for the target recording area and controlling recording.

Effect of the Invention With the above-described configuration, the present invention allows recording control of an optical disc device using an optical disc in which recording information in a management area is compressed, even for an optical disc in which recording conditions differ for each recording area divided into a plurality of areas.

EXAMPLE Hereinafter, an optical disc and an optical disc device according to an embodiment of the present invention will be described with reference to the drawings.

In each of the following embodiments, the configuration of the optical disk device is the same as the example shown in FIG. 5, and the operation is the same except for item (b), and only the configuration of recorded information is different. Only items (b) and (b) will be explained.

FIG. 1 is a configuration diagram of recorded information in a first embodiment of the present invention. The recording condition of a specific recording area is selected as a reference value, and for each recording area other than the selected recording area, the difference in recording condition with the recording area adjacent to this recording area is set as a difference value. As recording information, a collection of reference values and difference values is used. For example, under the recording power conditions as shown in Figure 6, the recording area l
The recording power of
,2,...9), then PI
, ΔPI, ΔP2. - Old: Record ΔP9 in the management area as recording information. The control unit knows in advance which area is the reference area. Since the difference value is one or more orders of magnitude smaller than the reference value, the entire recorded information can be compressed by using the difference value.

The operation (b) of the optical disc device of this embodiment configured as described above will be explained.

(b) When a search command and the address of the area to be recorded are transmitted from the higher-level control device to the control unit 6 through the control line 61, the control unit 6 stores the recording information of the management area according to the address in the management information storage unit 6. This is set in the recording/reproducing drive unit 7 by searching for the address and determining Pn-PI+ΣΔPi (n-2, 3, . . . 10). Then, the head 3 is put into a reproducing state, and the address is sent to the head transfer section 8 to transfer the RAD 3. When the target address is reached, recording is performed in the recording/reproducing area 9 from the higher-level control device via the control line 61.

As described above, in this embodiment, since information is compressed by recording the difference value between the reference value and the recording conditions for each recording area as shown in FIG. 1, the storage capacity of the management information storage section can be reduced.

In addition, PI, P2.・・・・・・When PIO decreases monotonically, the difference value may be selected as the absolute value. In this case, Pn
It is necessary to subtract when calculating.

Also, the difference value with respect to the reference value PI is ΔPn=Pn+ 1-
P 1 (n -1, 2, -9), and recording control may be performed by determining Pn-PI+ΔPn-1 (n-2, 3,...10) according to the address. , In this case, there is no need to calculate Σ, so the calculation is simple and the calculation processing time is short.

Note that since the recording area selected as the reference value is known by the control unit in advance, the recording conditions of any recording area may be selected as the reference value.

FIG. 2 is a configuration diagram of recorded information in a second embodiment of the present invention. The difference from the first embodiment is that the number of difference values is reduced, targeting the case where the values of the recording conditions have some linearity. When there is linearity, the difference value of the recording conditions takes the same value, so if the control unit knows in advance in which region there is linearity, recording control can be performed.
2. If there is linearity in the recording area of 3, the difference value is 8P
1-1ΔP2, so Pl, ΔP1. ΔP3.・・・・・・ΔP
9 is recorded as recording information.

The operation (b) of the optical disc device of this embodiment configured as described above will be explained.

(b) When the search command and the address of the area to be recorded are transmitted from the higher-level control device to the control unit 6 through the # control line 61, the control unit 6 stores the management information of the management area according to the address in the management information storage unit 6. , and determines Pl or P2-PI+ΔP1 or P3-PL+2ΔP1 or Pn-P1+2ΔPi+ΣΔPi (n-4, 5,...10) according to the address, and sets it in the recording/reproducing drive unit 7. do. Then, the head 3 is put into a reproducing state, and the address is sent to the head transfer section 8 to transfer the RAD 3. When the target address is reached, recording is performed in the recording/reproducing area 9 from the higher-level control device via the control line 61.

As described above, in this embodiment, the difference value is compressed and recorded in a certain area as shown in FIG. (
In addition, the storage capacity of the management information storage section can be reduced.

As described in detail, according to the present invention, it is possible to efficiently control the recording of an optical disc device using a compressed amount of information even for an optical disc having different recording conditions for each divided recording area. Its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of recorded information in a first embodiment of the present invention, FIG. 2 is a configuration diagram of recorded information in a second embodiment of the present invention, and FIG. 3 is an area division diagram of an optical disc having a control track. Figure 4 is an explanatory diagram of the recorded information of control data, Figure 5 is a block diagram of the optical disc device, Figure 6 is a diagram of setting the recording power value in all recording areas, and Figure 7 is the structure of the recorded information. It is a diagram. 1... Optical disk, 2... Management area,
3... Head, 4... Management information reproducing section, 5... Management information storage section, 6... Control section, 7...... Recording/reproducing drive unit, 8... Head transport unit, 9... Recording/reproducing area. Name of agent: Patent attorney Shigetaka Awano Haka 1 person 113
Fig. 2 Shun re-principal habit area Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. Fig. 2) Pt + A/'J

Claims (2)

[Claims] (1) The recording conditions are different for each divided recording area, and the recorded information is divided into a first block and a second block and recorded in the management area, and the first block has a specific recording area. An optical disc in which a recording condition is recorded as a reference value, and in the second block, for each recording area other than the specific recording area, a difference in recording condition with a recording area adjacent to this recording area is recorded as a difference value. . (2) In calculating the recording conditions of the target recording area of the optical disc according to claim (1), a holding means for reproducing the management area, reading out and retaining recorded information, and a reference when the target recording area is a specific recording area. control means for determining the recording conditions of the target recording area and controlling recording by adding or subtracting the integrated value of the difference value from the specific recording area to the target recording area to the reference value at other times. An optical disc device characterized by: