MXPA99003752A - Optical disc having oscillating lands and grooves - Google Patents

Abstract

In an optical disc, an ID field contains a plurality of address information, and is preliminarily recorded in convex and concave signals, and is composed of two sets offset by about 1/2 track pitch toward the internal or external track direction adjacent to the guide track, an information recording field is composed of grooves and lands oscillating at a single frequency in the radial direction, and the grooves and lands alternate in every revolution of the guide track. When w bits of information are included in one period of oscillation, an information unrecorded field between the ID field and information recording field is arranged to have a length of w/10 bits or more and/or w bits or less, and therefore, when recording continuous information data such as video data, it is possible to record continuously by generating a clock securely from the oscillating signal, and moreover, the format efficiency is improved, so that a format of a larger capacity is achieved.

Description

OPTICAL DISC WHICH HAVE FURROWS AND OSCILLATING RECORDED PARTS Technical Field The present invention relates to a format of an optical disk, and more particularly to an optical disc that can be rewritten.

Background of the Technique __ Optical discs are currently widely used as a means to record computer programs such as image, sound and computer data. In particular, lately there is a growing demand to improve the recording density of the optical disk, and the development of an optical disk format suitable to satisfy such demand is therefore highly desirable. A format of an "optical disk that can be rewritten at 130 mm" is what is described below. The optical disc format of the rewritable type of 130 rom is specified in Ref.030074 JIS X 6271. The format includes the format of type ^ A in which a continuous groove is formed spirally on a disk, and the parts not recorded between the grooves are used as tracks for signal recording, and the type B format , in which the marks of the samples are formed on a disk, and the course of the course is controlled by a servo sampling system. The tracks for recording the information data in the type A format are tracks free of fluctuations (ie, of light vibration), and the data of the information are recorded only in the non-recorded parts (between the grooves). In the type A format, a standard user data format in the case of a user data capacity of 512 bytes is shown in Figure 14. The numerical references shown in the diagram refer to the number of bytes (B ) that will be distributed in each signal. In the bytes of the user of 512 B, correction codes, re-synchronization bytes and control bytes are added, and the data field has a capacity of 650 B. In the sector for the registration of signals In the field of data, it is necessary to add a sector mark (SM) that designates the beginning of the sector, a field of ~ VFO for synchronization with the reproduction of the clock, an ID field that shows the direction of the sector , a pre-registered address field such as an address mark (AM) that shows the beginning of the ID field, a deviation or decentering detection field (ODF) to rewrite the data, and that includes the ALPC used in inspection of laser output, a 15B separation field used to avoid overlapping with the subsequent sector, and other fields, when necessary. As a result, the total sector capacity is 746 B. For the user data capacity of 512 B, the separation field is 15B, and there is a redundancy of approximately 2.9%. For an additional larger capacity, it is desired to reduce the redundancy as much as possible. In such a conventionally rewritable optical disk, when information is recorded on a guide track of fluctuations, usually, the information is processed using a clock signal fi.a associated with the optical disk device. However, due to the effects of fluctuations in rotation or eccentricity when recording and reproducing the information on an optical disc, the actual length of the sector can deviate from the ideal sector length, which causes increase or decrease in the number of clock pulses counted by a fixed clock. For example, if the number of impulses of clock is reduced, the information can not be registered completely within the sector and can overflow to the next sector. Accordingly, the separation field is provided by preliminarily considering a decrease in the clock, so that the length of the sector is extended. For the corresponding portion, therefore, the redundancy is increased, and the user's data capacity is sacrificed. In addition, when continuous data is recorded over time, such as video data and audio data, in the conventional method of recording after the sector address is confirmed at once, if the sector address can not be confirmed, it takes time to confirm the address again and the record, and the continuous data can not be recorded: In another method of recording the data where the sector address is predicted from a previous address "sirn" reconfirm the direction of the sector, errors are accumulated when the length of the sector is counted by a fixed clock, and the deviation of the count increases. In particular, in the intermediate address method in the unregistered groove-record system that has a possibility of declining the accuracy of the address detection, it was possible that the previous problem of continuous recording of video data and audio data could be even more serious. In addition, in the future, if there are optical discs that have several different data capacities with a narrower track spacing in the field that can be rewritten, the format of the optical discs should be such that they are fully compatible each.

Detailed Description of the Invention The present invention is contemplated in light of the problems described above, and therefore an object thereof is to provide an optical disk having such a format for easily obtaining a recording and reproducing apparatus of high reliability, capable of controlling the formation of tracks or address allocation, or stably generate a clock signal, and an apparatus for stably manufacturing such optical discs. In addition, on an optical disk containing both a ROM field (which includes the internal reading area) and a rewritable field, it is an object of the present invention to provide a format optical disk capable of generating a stable clock signal to process the information data at the beginning of the field that can be written, and record the data of the information in a secure manner. It is also an object to present a format capable of easily achieving the compatibility of several types of optical discs that differ in their respective data capacities. In order to achieve these and other objects, a first aspect of the optical disk of the invention refers to an optical disk having an ID field, a field for recording information, and an unregistered field of information between the field of information. ID and the information recording field, formed in each of a plurality of composite sectors on a guide track, in which the ID field contains a plurality of the address information, and is recorded in the concave signals and convex, and composed of two sets deviated by about 1/2 of the track spacing, each in the direction of the inner or outer circumferential track adjacent to the guide track, the information record field is composed of grooves and parts not recorded (between the grooves) that fluctuate (oscillate slightly) in a single frequency in the radial direction, and the grooves and unrecorded parts are changed on each turn ~ of the lead track. A second aspect of the optical disk of the invention refers to an optical disk in which when the information contained in a period of fluctuation is of bits, the unregistered field of information between the field of ID and the field of information registration It has a length of w / 10 bits or more and / or bits or less. A third aspect of the optical disk of the invention refers to an optical disk in which the information to be recorded in the information recording field starts with a specific phase of the fluctuation frequency. A fourth aspect of the optical disk of the invention refers to an optical disk in which the sector has a length of a multiple of a whole number of the frequency of the fluctuation, and a whole number of the sectors is contained in each round of the guide track. A fifth aspect of the optical disk of the invention refers to an optical disk having an ID field and an information recording field, formed in each of a plurality of composite sectors on a guide track, in which the field ID contains a plurality of address information, and is recorded in the concave and convex signals, the information recording field is composed of grooves and unrecorded parts (between the grooves) that fluctuate (oscillate slightly) at a single frequency in the radial direction, the grooves and the unrecorded parts are changed on each turn of the guide track, the sector has a length of a multiple of a whole number of the fluctuation period, a whole number of the sectors is contained in each turn of the track guide, and the initial phase of each turn of the guide track of the fluctuation is within + bits of the information bits, the final phase within + bits, and its relation is Ln <; _ = m (n, m are natural numbers). A first aspect of the apparatus for manufacturing an optical disk of the invention comprises the means of generating the ID signal to generate a signal for the ID field, means of generating the "specific signal to generate a signal in different portions of the ID field, means for generating the jitter signal to generate a jitter signal at a single frequency, means for generating the synchronization signal to provide a gate signal of the specified timing, first signal selection means for select either the signal of ID or the specific signal, generating means of the deflection signal to issue a deflection signal to deflect the ID field by approximately 1/2 of the track spacing each with respect to the inner circumferential side and the outer circumferential side of the two sets, second signal selection means for selecting either the jitter signal or the deflection signal, deflection means for receiving the output of the second signal selection means and deflecting the bright spot, and means of readjustment to readjust the phase of the fluctuation signal in each revolution of the optical disc. ~ A second aspect of the optical disc manufacturing apparatus of the invention "comprises first means of selecting the signal to make valid either the ID signal or the specific signal, means of adjusting the diameter of the light spot to change the size of the signal. a luminous point receiving the timing signal, the on / off means for making the signal of fluctuation valid / invalid by the timing signal, bending means for receiving the output of the on / off control means and deflecting the bright spot, and resetting means to readjust the jitter signal phase in each revolution of the optical disc.

A sixth aspect of the optical disk of the invention relates to an optical disk composed of the coexistence of a ROM field having information with a length of at least one track formed in the rows of concave and convex depressions, and a field that is can re-write with a length of at least one track, in which a non-registered field with information with a length of at least one track that is recorded, is formed between the ROM field and the field that can be rewritten , the field that can be rewritten has a spiral or concentric guide track fluctuation in the radial direction, the ROM field is formed of rows of concave and convex depressions "concentric or spiral, and a part or whole field in the field side that can be rewritten from the unregistered field of information has a transition field that has a concentric or spiral guide track that fluctuates in the continuous or intermittent radial direction A seventh aspect of the optical disc of the invention refers to an optical disk in which the ROM field is an internal reading field, and the spacing of the track To of the ROM field and the spacing of the track Tw of the field that can be rewritten have the following relationship: To > = Tw.

Brief Description of the Drawings _ Figure 1 is a diagram showing a format structure that changes over the grooves and the unrecorded parts in an optical disk of a first embodiment of the invention. Figure 2 is a detailed diagram of a sector format in the optical disk of the first embodiment of the invention. Figure 3 is a diagram showing a configuration of the information data and the fluctuation of the guidance track. Figure 4 is a schematic diagram of the optical disc of the first embodiment of the invention. Figure 5 is a block diagram of an optical disc device for recording information on the optical disc of the first embodiment of the invention. Figure 6 (a) is a structural diagram of an ID field offset in 1/2 of the track spacing in an optical disk of a second embodiment of the invention. Figure 6 (b) is a diagram for explaining the deviation of the phase of the fluctuation in the optical disc of the second embodiment of the invention.

Figure 7 is a detailed diagram of a sector format on the optical disc of the second embodiment of the invention. Figure 8 (a) is a structural diagram of an ID field in which grooves and unrecorded parts have independent addresses, in an optical disk of a third embodiment of the invention. The figure 8 (b) is a diagram for explaining the deviation of the phase of the fluctuation in the "optical disk of the third embodiment of the invention." Figure 9 is a structural diagram of an optical disk manufacturing apparatus in accordance with a fourth embodiment of the invention. MODE OF THE INVENTION Figure 10 is a structural diagram of an optical disk manufacturing apparatus according to a fifth embodiment of the invention Figure 11 is a diagram showing the relationship of a ROM field for reading only, a field that can be rewritten, and an unregistered field of information, in an optical disk of a sixth embodiment of the invention. Figure 12 is an amplified view of a transition field between the ROM field and the rewritable field.

Figure 13 is a diagram showing the relationship of an internal reading field for reading only, an unregistered field of information, a field that can be rewritten, a reading field to the outside, on an optical disk of a seventh embodiment of the invention. Figure 14 is a diagram showing an example of the format of a conventional optical disk.

Best Way to Carry Out the Invention The embodiments of the invention are described below.

Modality 1 Figure 4 is a schematic diagram of an optical disk according to a first embodiment of the invention. As shown in Figure 4, the guide track of the optical disc is arranged or distributed so that the optical head can follow the same when recording or reproducing the information, and is designed to change over the groove (solid line) and the part without record (dotted line) in each revolution. Having a plurality of sectors in a revolution, the sector is composed of a field of ID, the field of record of information, and the unregistered field of information. The illustrated guide track is spiral, but it may be concentric, or spiral in a reverse direction. The number of sectors per revolution is also arbitrary. Figure 1 shows a switched portion of groove and part not recorded in the optical disc of the first embodiment of the invention. The ID field consists of four parts, ID1, ID2, ID3, ID4, each containing the address information, and ID1 and ID2 and ID3 and ID4 are grouped by pairs respectively, and are diverted by a distance of approximately 1/2 of the track spacing with respect to the inner circumferential side or the outer circumferential side of the guide track. The guide track also fluctuates in an orthogonal direction with respect to the direction of formation or tracing of tracks of the optical head. The operation of the optical head that "moves from" the outer circumferential side to the outer circumferential side and which continuously registers or reproduces, is described later in a case in which the number of sectors per revolution of the optical disc is k ( LOL). When the optical point is in the Unregistered part #nl of the information record field, after the tracing of ID1 and ID2 (# n + k) and of ID3 and ID3 (#n) successively in the ID field, it moves in the groove # n in the registration field - the information to register or reproduce. After this, when the optical disc rotates and returns, the optical point passes the ID field from the groove # n + kl in the information record field, and moves to the portion of the part without record # n + k in the field of the record of the information, by means of which it is recorded or reproduced. Figure 2 shows the detail of the format of the sector in the optical disk of the first embodiment of the invention. The capacity of a sector is 2697 B, including the ID field, the unregistered field of the information, and the information record field. Actually, the information is recorded in the information recording field, which consists of the protection field 1 (20 B), the VFO field (35 B), the PS field (3 B), the data field (2418 B), the PA field (1 B), and the protective field 2 (55 B). Of these, in particular, the data field of 2418 B is composed of the field SY (2 B) and 26 sets of 'data 1, data 2, .... data 26 (91 B each). The data field includes the error correction codes, and the "real capacity" of the user is 2048 B. The ID field consists of ID1 (46 B), ID2 (18 B), ID3 (46 B), and ID4 (18 B). The field not registered with the information consists of the mirror field (2 B), the gap or empty field (10 B), and the separation field (25 B). ID1 to ID4 are provided to recognize the direction of the sector, and it is also possible to recognize whether the next entry guide track is in a groove or in an unrecorded part. From the unregistered field, the field of the mirror and the field of the gap or vacuum are the fields to adjust the power of the laser beam in the register. The field of separation is provided to adjust the deviation of the information data in the direction of the time axis due to the fluctuation of the optical disk rotation or the eccentricity of the optical disk. The separation field has 25"B, and for the user data of 2048 B, the redundancy is approximately 1.2% Protection field 1 and protection field 2 are for protecting the means of recording deterioration in the e_ Start-up or finishing of the data due to the repeated recording of the information data The VFO field is provided to assist the operation of the PLL circuit for the production or reproduction of a clock signal when it is reproduced. PS field shows "the start of the information data, and the PA field determines, specifically when they are demodulated, the final data of the information to be recorded, according to the rule based on digital modulation. Figure 3 shows the configuration of the information data and the guide track on the optical disc of the first embodiment of the invention. In Figure 3, when the billing phase is 0, the registration starts for bit 1, which is the first bit in the row of the data bits of the information. In the illustrated example, the phase is 0, but this phase can be an arbitrary phase. Figure 5 is a block diagram of an optical disc device for recording information on the optical disc of the first embodiment of the invention. With reference to the optical disk device of Figure 5, the operation of recording information data on an actual optical disk is described below In Figure 5, the reference number 50 is an optical disk, 51 is an input I / F, 52 is an error correction coder, "" 53 e "s a digital modulator, 54 is a generator of the additional signal, 55 is a multiplexer, 56 is a Semiconductor laser beam modulator, the 57 is "an optical head nail, 58 is a head amplifier, 59 is a TE detector (track search error signal), 5a is a head driver or polarizer, 5b is an ID detector, 5c is a timing generator, 5d is a fluctuation signal detector, and 5e is a write clock signal generator. Via input I / F 51, digitized audio data, video data, compiler data and other main information are entered. The input data is fed to the generator 52 of the error correction code, and an error co-error code is calculated, and added to the input data. On the other hand, the optical head 57, determines the target or target sector - to record the information on the optical disc.50, the bright spot is plotted sequentially on the ID field, the unregistered field of the information, and the field for recording the information on the optical disk 50. It is said, the optical head 57 radiates to the optical disk 50 with laser light of almost constant power. The reflected light has a change in intensity, and is photoelectrically covered by the photo detector on the optical head, and a reproduced signal (RF signal) is detected. Since the reproduced signal is a signal of low amplitude, it is amplified by the amplifier 58 of the head, and then passed to the TE detector 59, the ID detector 5b, and the fluctuation signal detector 5d. The signal passed to the TE detector is used as the basis for the search of tracks where a groove or unrecorded area of the optical disc is being traversed or reproduced by the magnetic head, and the TE signal detected and the signal of the phase and the information of the groove phase / unrecorded area are placed on the head impeller 5a. The head driver 5a sends the pulse signal to track the light spot with respect to the optical disk 50 from these signals, to the optical head 57. As a result, the light spot can safely trace the disk guide track optical 50. In this active state of track search, the signal that is input to the ID detector 5b is transformed into a binary value, of 0 or 1, that is, digitized. From the row of the binary digital signal, first, the direction of the target or target sector is investigated. In addition, from the four values of the address obtained, the way of switching from the groove to the non-engraved area, or from the non-engraved area to the groove, is known, and therefore, in the path of the clues, it is possible Use the phase signal of the un-engraved area or the groove. As a result of the previous operation, when the timing to detect the. direction by the ID detector 56 is sent to the generator -of synchronization 5c generator synchronization 5c it generates and outputs various timing signals for the operation of generator 52 code error correction, the digital modulator 53, the generator of the additional signal 54, and the multiplexer 55 at the specified times. Usually the generator timing 5c creates various signals using a clock signal fixed, and the optical disc 50 of the invention, a sefial fluctuation is detected from the guide track, and the signal of the specific frequency can be Withdrawal, and therefore, from this signal, the clock signal synchronized with the rotation of the optical disk 50 can be created. That is, the 5d detector signal fluctuation receiving external sefial from el_ amplifier head 58 in Figure 5 extracts the sefial fluctuation of the specific frequency of this sefial through, for example, a lowpass filter . The extracted signal is passed to the generator 5e of the write clock signal. In the generator 5e of the signal of Writing clock, a clock signal synchronized with the rotation is produced in the PLL circuit. The clock signal synchronized with the rotation of the optical disc 50 created in the generator of the digital clock signal 5e is provided to the digital signal generator 53, the generator of the additional signal 54, the multiplexer 55, and the generator of the timing signal 5c. The digital modulator 53 that receives the output signals from the error correction encoder 52, i.e., the information data and the error correction code data, "antithetically replaces the continuous data of 0 and 1". originals with other continuous data of 0 and 1 according to a specific scheme The output from the digital modulator 53 is passed to the multiplexer 55. On the other hand, the generator of the additional signal 54 generates the signal for the protection field 1 , the VFO field, the PS field, the protection field 2 and others, apart from the data fields shown in Figure 2. The signal for the PA field is usually based on the specific manner of the digital modulation, and therefore it is generated in the digital modulator 53. The generation of the SY signal in the data field is possible both in the generator of the additional signal 54 and in the digital modulator 53. The output from the generator of the additional signal 54 is provided to the multiplexer 55. The two signals provided to the multiplexer 55 are adjusted in the timing, and are passed to the semiconductor laser beam modulator 56. In the laser beam modulator semiconductor 56, an activation or polarization signal for modulating the output of the semiconductor laser beam mounted on the optical head 57 is created, and sent to the optical head 57. The optical light beam having a specific output value is emitted from the optical head 57 to the optical disk 50, and the information data are recorded on the optical disk 50. Conventionally, the information data was processed by a fixed-clock signal, and recorded, and, not synchronized with the rotation of the optical disk, it is possible that, in the worst case, the data of the information may not be recorded in the length of the given sector. However, by using the optical disc of the invention wherein the guide track fluctuates or oscillates, the clock signal synchronized with the rotation can be used as mentioned above. As a result, information data can be recorded in a specific sector in a secure manner.

Meanwhile, the clock signal created from the jitter signal causes a deviation from the jitter phase, actually, due to the operation of the PLL circuit to generate the clock signal. The length of the unregistered field with the sector information is determined as follows in consideration of the deviation of the fluctuation phase. Since the noise is contained in the signal of fluctuation, a deviation of the phase occurs in the clock signal created from the fluctuation signal. Assuming that the C / N of the jitter signal will be 15 dB and the width of the PLL circuit band to create the clock signal from the jitter signal will be 1 kHz, if the components of the noise contained in the signal of fluctuation are in a normal distribution, and furthermore assuming that the level of noise where the probability of the signal of fluctuation that is not being transformed into the binary value by the chop or fixed module is 1/100000 and in addition, assuming that the amount of information bits that are introduced in a fluctuation period will be of w bits, the deviation of the minimum phase is calculated to be 0.15w bits. On the other hand, the maximum deviation can be easily established within approximately + w / 2 bits. Consequently, the length of the field not registered with the info to absorb the deviation of the sector record clock can be controlled to O.lw bits or more and within w bits. Doing a calculation assuming that the amount of information data contained in a fluctuation period will be 93 bits, since it is possible to deviate both + and - in the directions, the length of the field not registered with the information can be of w / 10 = 9.3 bits or more and w = within 93 bits.

In one embodiment, however, to further improve reliability, the data capacity of the unregistered field, i.e., the separation field, is set at almost twice the appropriate value, that is, 25 B = 200 bits . Even at the capacity of nearly twice the 25 B data of the appropriate value, it is approximately 1.2% for the user data capacity of 2048 B, which is a considerably lower value when compared to 2.9% of the prior art. At this moment, in the format of the sector shown in Figure 2, the entire sector is 2697 B, and there are 232 fluctuation periods of 93 bits each. In addition, a track is composed of a whole number of the sectors. Consequently, the fluctuation phase is complemented in each sector and in each track, the design of the recording and reproduction apparatus is simplified. The problem of the phase change of the fluctuation in each track is also solved. As for the information to be recorded, in the case of audio data or (moving images) video data, the information generated continuously must be processed and recorded. However, if it is registered while confirming the address of the ID field in each sector, if it fails to detect the address, the data that is entered continuously can not be fully registered. Or, in the event that an address has failed, it may be possible to record by predicting from the address of the preceding sector. However, since such a prediction is based on the counting value of the fixed clock signal, errors are accumulated in the counting value due to the fluctuation of the rotation of the optical disk. As a result, the data that will be registered in the sector can be spilled or passed on to the subsequent sector. However, in the format of the optical disk of the first embodiment of the invention, since the signal of the fluctuation is used as the reference ", the Previous problems can be solved easily. As shown in Figure 3, determining the starting point of registration in each sector based on phase 0 of the fluctuation signal, in that if there is no error in the detection of the fluctuation signal, if the address can not be detected, continuous registration is possible. In addition, the accumulation of the count values of the clock signal in each sector does not occur. In each field, the specific data distribution is arbitrary. The amount of the data and the distribution of the data of the sector format in Figure 2 are examples only and are not proposed to be limiting. As described here, according to the optical disc of the first embodiment of the invention, in the recording of continuous information data such as audio data and video data (moving images), if the address of the The ID field provided in each sector can not be detected, it is possible that it is recorded continuously by the generation of a clock signal in a safe manner from the signal of fluctuation, and a format that performs or obtains a larger capacity than in The prior technique can be provided.

Mode 2 Figure 6 (a) shows the address field of an optical disk in an L / G system (reproduction and recording of groove information and unrecorded area) on an optical disk in a second embodiment of the invention. On the optical disk in Figure 6 (a), the address information in the ID field consists of two sets, and the distance is offset by 1/2 the track spacing with respect to the inner circumferential side or outer circumferential side. The width of the concave and convex signal is almost equal to the width of the groove and the unrecorded area in the information recording field. The groove and the unrecorded area are changed at each turn of the track. The ID field consists of two portions, IDa and IDb, each containing the address information, and is diverted from the guide track to the inner circumferential side or outer circumferential side approximately 1/2 the distance of the track spacing. That is, an address is shared by the groove and the adjacent un-recorded area. The guide track (information recording field) fluctuates in the orthogonal direction with respect to (in the radial direction a) the direction of the path or path of the optical head.

Figure 6 (b) explains the deviation of the phase from the fluctuation in a switching point of the groove and the area without recording once in each track in the optical disc of the second embodiment of the invention. The fluctuation has a period of multiple of whole number in each sector, and the track has a whole number of sectors in each round. Therefore, in a turn of the optical disc, the fluctuation phase must be continuous, but due to the effects of manufacturing such as the fluctuation of the rotation of the optical disc, a deviation between a revolution of the optical disc and the clock signal as the reference for processing the data, and the fluctuation phase can not be matched or completely matched. Consequently, within the fluctuation phase, the initial phase during the start of the fluctuation and the final phase after a lap of the track must be adjusted to a specific value. Assuming that the initial phase of the fluctuation in each turn of the track_guide will be + n bits of the information bits and the final phase will be + m bits of the information bits, it is the initial phase that it is stable in the precision without effects of the fluctuation of the rotation, and it is the final phase that suffers most of the effects of the fluctuation of the rotation, and consequently the relation of n f m is established. With respect to the initial phase, readjusting in each turn of the track, the accumulation of the deviation of the phase is avoided. Therefore, usually, the initial phase is adjusted within +1 bit of the information bits. The condition of the final phase m is described later. When the light point traces or traverses the area without intermediate recording (the unrecord area is not cut) between a groove and an adjacent groove on a finished optical disk, the frequency of the fluctuation is assumed to be a, the deviation is ? in the cut of the groove and the deviation of the phase is -? in the adjacent groove. Assuming that the fluctuation signal obtained in an ideal state without the deviation of the phase is A • COS ??, the signal of practical fluctuation with the deviation of the phase is A • COS (? T +?) + A • COS (? T -?) = 2A • COS? • COS? T.

That is, the signal of fluctuation is a signal modulated by the portion of the deviation of the phase (COS?). As a result, it leads to the possibility of inconvenience in the operation of the circuit. Consequently, to the extent possible, it is necessary to decrease this deviation from the phase so that the deviation of the phase can not be accumulated. If the deviation of the phase? is within 1/10 of the period, you get (COS?) < = (COS (2p / 10) = 0.81 and the level of the original signal is maintained, and the deviation of the phase is within a sufficiently permissible interval. That is, assuming a period of fluctuation that will be w bits of the information bits, the relationship with the final phase m in terms of the quality of the fluctuation signal that is practically sufficient is m < w / 10.

Here, the initial phase of the fluctuation signal is set to be 0 at the boundary or boundary between the front portion of the ID field and the field of the information record, but it can be defined elsewhere, by example, at the border or boundary between the back portion of the ID field and the information record field. The detail of the optical disc sector format of the second embodiment of the invention is shown in Figure 7. It is basically identical to that of Figure 2 showing the format of the optical disc of the first embodiment described above. What differs is the protective field 1 (20 + 1 B), the protective field 2 (55-1 B), the field of the gap or. vacuum (10 + j / 16 B), and the separation field (25-J / 16 B). Here, I is an integer from 0 to 7, j is an integer from 0 to 16, and I and j are randomly selected, and the length of the protective field 1, the protective field 2, the field of the gap or void, and the separation field varies in each record. As a result, deterioration of the registration medium due to repeated registration is prevented, and the number of times of registration is improved. According to the optical disc of the second embodiment of the invention described herein, a whole number of the sectors is contained in a turn of the guide track, the length of the sector is adjusted in times of integers _ of the period of fluctuation, and the The initial phase and the final phase of the fluctuation are made with a specific precision, and therefore the phases of fluctuations are matched or adapted when recorded and reproduced, so that the control of track travel and the generation of the clock signal of the optical disc device can be stabilized.

Mode 3 Figure 8 (a) shows the address field of an optical disc of an L / G system (reproduction and recording of grooves and unrecorded areas) on an optical disc in a third embodiment of the invention. On the optical disk in Figure 8 (a), the information of the address of the ID field is provided independently in the non-engraved area and the groove, being placed in the middle part of the un-engraved area and the groove. interference from the adjacent track, the width of the depressions of the concave and convex signals in the ID field is smaller than that of the unrecorded area or the groove. Figure 8 (b) explains the deviation of the phase from the fluctuation in the switching point of the unrecorded area and from the groove one in each turn of the track, in the optical disc of the third embodiment of the invention. The fluctuation has a period of multiple of integer in each sector, and the track has a whole number of sector in each round. Therefore, in a turn of the optical disc, the fluctuation phase is continuous, but due to the manufacturing effects such as the fluctuation of the optical disc, a deviation between a revolution of the optical disc and the clock occurs as the reference for the processing of the data, and therefore, the fluctuation phase may not be matched or fully adapted. Consequently, within the fluctuation phase, the initial phase during the start of the fluctuation and the final phase after a lap of the track must be adjusted to a specific value. Assuming that the initial phase of the fluctuation in each turn of the guide track will be + n bits of the information bits and that the final phase will be + m bits of the information bits, it is the phase initial that which is stable in the precision without effects of the fluctuation of the rotation, and it is the final phase that suffers, most of the effects of the fluctuation of the rotation, and consequently the relation of n < m is established. As regards the initial phase, readjusting in each turn of the track, the accumulation of the deviation of the phase is avoided. Thus, usually, the initial phase is adjusted so that it is within + 1 bit of the information bits. As in the optical disc of the second embodiment, assuming a period of fluctuation that will be w bits of the information bits, the relation with the final phase m is m < / 10. As described herein, according to the optical disc of the third embodiment of the invention, the direction of the ID field is provided independently in the groove and the non-engraved area, a whole number of the sectors are contained in one revolution of the track, the length of the sector is fixed in times of integers of the period of fluctuation, and the initial phase and the final phase of the fluctuation are ~ to a specific precision, and therefore, the fluctuation phases are matched or equalized when recorded and reproduced, so that control of track travel and generation of the clock signal of the optical disc device can be stabilized.

Modality 4 Figure 9 shows an optical disc manufacturing apparatus according to a fourth embodiment of the invention. This optical disc manufacturing apparatus is designed to fabricate an optical disk having two sets of address information in the ID field, which are offset by a distance "" from the 1/2 of the track spacing relative to the inner circumferential side or the side external circumferential, as explained in Figure 6 (a) and Figure 6 (b). Using this optical disk manufacturing apparatus, the current cutting operation of an optical disk is described below. In Figure 9, the reference number 150 is an optical disk motherboard, 151 is an optical head, 152 is a needle or spindle motor, 153 is a single rotation signal detector, 154 is a driver of the rotation of the needle or spindle motor, 155 is a generator of the reset signal, 156 is a generator of the reference clock signal, 157 is a modulator of the laser beam signal, 158 is a feed controller, 159 is a jitter signal generator, 160 is a first signal selector, 161 is a timer signal generator, 162 is a generator of the specific signal, 163 is a generator of the ID signal, 164 is a second selector of the signal, 165 is a generator of the deflection signal, and 166 is a deflector.

To form the ID field and the grooves (non-engraved area) of the guide tracks on the optical disk motherboard 150, the motherboard 150 of the optical disk, attached to the spindle motor 152 is rotated, and while a control of the feed in the radial direction, the optical head 151 emits a laser light modulated to the output to illuminate the mother card 150 of the optical disc. Particularly, to control the rotation of the spindle motor 152, the motor drive controller 154 with spindle receives a signal (eg, a signal from the Frequency Generator) that accompanies the rotation from the spindle motor 152, compares this signal with the clock signal of the generator 156 of the reference clock signal, and adjusts the rotary speed and phase of the motor with spindle. However, it is generally difficult to adapt or equalize the reference clock signal exactly in the bit unit due to the effects of the characteristic response of the spindle motor 152, the eccentricity of the optical disk card 150, etc. On the other hand, the modulation of the output of the laser light sent from the optical head 151 is carried out as follows. The signal for the ID field is issued from the signal generator of ID 163. The The signal generated in the generator of the ID signal 163 is issued as a row of digital data of 0 or 1, which are synchronized with a clock signal, based on the clock signal issued from the clock signal generator 156. reference. The generator of the ID signal 163 receives a reset signal synchronized with one revolution from the generator of the reset signal 155, and synchronizes it in each revolution. The output from the signal generator ID 163 is fed to the first selector of the signal 160. When the groove is formed, the specific data is obtained from the generator of the specific signal 162. Usually, the laser beam is emitted. when the notch is formed, while the laser light is not emitted in the area without recording. Therefore, the output signal is changed or switched in each revolution, and the laser beam distributes the illumination and extinction (large / small output) in each revolution. The signal from the generator of the specific signal 162 is also fed into the first selector of the signal 160. The signal of the output from the first selector of the signal 160 selected to issue either of the two input signals depending on the output of the generator of the synchronization signal 161. In the fields of the address from ID1 to ID4, the signal from the signal generator of ID 163 is selected, and in other fields, the signal from the generator of the specific signal 162 is selected. The generator of the timing signal 161 receives the reference clock signal sent from the generator 156 of the reference clock signal and the reset signal issued from the generator of the reset signal 155, and produces and outputs a signal from timing to select several signals. Receiving the output signal from the first selector of the signal 160, the modulator of the laser output 157 sends a signal to the optical head 151 so that the laser light of the specified intensity can be sent from the optical head 151. As a result , the optical head 151 emits laser light at a specific output value, and illuminates the mother card 150 of the optical disk. In the generation of the fluctuation for the guide track, the signal of fluctuation from the generator of the fluctuation signal 159 is used. In the ID field, the direction is deviated in 1/2 of the track spacing using the deflection signal of the deflection signal generator 165. The signal of fluctuation and the signal of deflection are selected by the signal from the generator of the timer signal 161 by the second selector of the signal 164. The output of the The second selector of the signal 164 is connected to the deflector 166. The deflector 166 deflects the light spot at 1/2 the spacing of the track in the ID field, and vibrates the light beam or light spot in the radial direction in the different fields of the ID fields, which causes the groove to fluctuate (oscillate). The optical head 151 is moved in the distance corresponding to the portion of the track spacing by a revolution in the radial direction, by the signal of the feed controller 158. Accordingly, the motherboard 150 of the optical disk is cut, but The phase of rotation of the motor with spindle 152 and the output signal of the generator of the jitter signal 159 is deviated due to the effects of the fluctuation of the rotation or eccentricity of the mother card 150 of the optical disk. Here, to adjust the initial phase of the jitter signal in each revolution, based on the output signal from the detector of the rotation signal 153, the generator of the reset signal 155 readjusts the jitter signal generator 159 in every revolution. As a result, depending on the actual rotation of the optical disk mother card 150, the phase of the jitter signal is set securely at a specific location once in each revolution, by which the possibility of the accumulation of the deviation of the phase is eliminated.

Modality 5 Figure 10 shows an optical disc manufacturing apparatus according to a fifth embodiment of the invention. This optical disk manufacturing apparatus is designed to fabricate an optical disk having the information of the ID field address independently in the "intermediate" position of the grooves and the unrecorded areas, as explained in Figure 8 (a) and in Figure 8 (b) In Figure 10, only the different portions of Figure 9 that show the constitution of the optical disc manufacturing apparatus in the fourth embodiment of the invention are described below.

What differs from Figure 9 is an on / off controller 200 and a controller 201 in the diameter of the light spot. The on / off controller 200 controls the signal of the generator 159 of the jitter signal, and fluctuates the guide track outside the ID field. The adjuster 201 of the diameter of the light spot, using liquid crystal or the like, changes the numerical aperture NA of the constant optics, and varies the effective diameter of the luminous point. Referring to Figure 10, the description of the actual cutting operation of the optical disc is explained later. The explanation of the same operation as in the apparatus for manufacturing the optical disc in the fourth embodiment is omitted. The signal in the ID field from the generator 163 of the ID signal is provided to the first selector of the signal 160. The specific data to form a path from the generator of the specific signal 162 is passed to the first selector of the signal. signal 160. The output signal from the first selector of the signal 160 is selected depending on the output of the generator of the timing signal 161. In the fields of the address from ID1 to ID4, the signal from the signal generator of the signal ID 163 is selected, and in other fields, the signal from the generator of the specific signal 162 is selected. Receiving the output signal from the first selector of the signal 160, the modulator of the laser output 157 sends out a signal to the optical head 151 so that the laser light of the specified intensity can be output from the optical head 151. As a result, the optical head 151 emits the light laser to the specified output value, and illuminates the mother card 150 of the optical disk. To generate the fluctuation in the guide track, the signal of fluctuation from the generator of the fluctuation signal 159 is used. The jitter signal is fed to the on / off controller 200, and the jitter signal is activated in the different fields of the ID field by the signal from the generator of the timing signal 161. The output of the on / off controller "200 is connected to the deflector 166. The deflector 166 vibrates the luminous point in the radial direction in the different fields of the ID field, and causes the groove to fluctuate In addition, by the signal from the generator of the timing signal 161, the controller 201 of the diameter of the luminous point controls the reduction of the point luminous in the ID field The optical head 151 is moved by a distance corresponding to the portion of the track spacing by revolution in the radial direction by a signal from the feed controller 158. Accordingly, the mother card 150 of the optical disk is cut off, but the rotation phase of the motor with spindle 152 and the output signal of the jitter signal generator 159 is deviated due to the effects s of fluctuation of rotation or eccentricity of the optical disk 150 motherboard. Here, to adjust the initial phase of the fluctuation signal in each revolution, based on the output signal from the single rotation detector 153, the generator of the readout signal 155 readjusts the jitter signal generator 159 in FIG. every revolution As a result, depending on the actual rotation of the optical disk motherboard 150, the phase of the jitter signal is set securely at a specific location once in each revolution, thereby eliminating the possibility of accumulation of the deviation of the phase. - Modality 6 Figure 11 shows the relationship of a field of ROM only for reading, a field that can be rewritten, capable of rewriting the information, "and a field not registered with the information, in an optical disk of a sixth embodiment of the invention." As shown in Figure 11 , a field of ROM only for reading, a field that can be rewritten, capable of rewriting information, and an unregistered field with the information provided in the middle part between the field of the ROM and the field that can be rewritten, are available, and a field of transition is provided in a partial area or the entire area on the side of the field that can be rewritten, of the field not registered with the information. An amplified view of the transition field between the ROM field and the rewritable field is shown in Figure 12. The composition of the transition field is considered in two types. In one type, "as in the transition field shown in Figure 12, without containing the address field or ID, it is composed of the continuous guide track that contains the fluctuation signal. the field that can be rewritten, it is composed of the address field or ID (address field = ID.) In any case, a processing clock signal to record the processing can be generated. when information is recorded in sector # 0, after the path of the light dot in the transition field (groove) in the field not registered with the information, a clock signal to record the processing can be obtained based on In the fluctuation signal obtained from the RF signal, the direction of movement of the luminous point is assumed to be the direction of the arrow (from the left to the right in the diagram). towards the field of transition, the length of the transition field is required to be at least equivalent to a track because the incident angle during rotation of the optical disk can not be specified. In Figure 12, the field of the transition is three tracks long, and the groove and the unrecorded area are changed in each revolution. The switching point of the groove and the non-engraved area in the transition field can be an area of the beginning of the ID field extended to the inner circumferential side, or an area of the final portion of the extended ID field to the inner circumferential side . Alternatively, the groove and the unrecorded area can not be changed. Sector # 0 is not always required to start from an unrecord area track, but you can start from a track track. As explained here, according to the "optical disc of the modality, placing the transition field in a partial area or in the entire area on the side of the" field that can be rewritten from the field not registered with the information, a record clock signal from the groove in sector # 0 can be stably generated at the beginning of the field that can be rewritten.

Modality 7 Figure 13 shows the relationship of an internal reading field only for reading, an unregistered field with the information that contains the transition field, a field that can be rewritten, and a reading field outside, on a disk optical of a seventh embodiment of the invention. Here, the spacing To of the track, of the internal reading field, which is a field of ROM for reading only, and the spacing Tw of the track of the field that can be rewritten, are placed or set in a ratio of To >; = Tw. That is, in several optical discs that differ in the capacity of the data, the track spacing of the internal reading field is constant, while the track spacing of the field that can be rewritten is variable to change the capacity of the data. As a result, when the capacity of the data in the field that can be rewritten is minimal, To = Tw and when the capacity of the field that can be rewritten is increased, the spacing Tw of the track of the field that can be rewritten is increased. rewriting, it is reduced. In the optical disk of the modality described here, arranging or distributing the spacing To the track of the internal reading field, and the spacing Tw of the field track that can be rewritten so that they can be in a To > Tw, the optical discs that differ in their capacity from the data in the field that can be rewritten, can be reproduced easily since the track spacing is the same in the internal reading field that will be reproduced in the first place. In addition, knowing the characteristic of the track of the field that __ can be rewritten according to the information "of control reproduced, track control of the track that depends on the characteristic of the track is obtained, and compatibility can be guaranteed easily. ' Industrial Applicability The present invention finds particular use in the optical data recording discs to improve the storage capacity of the data thereof. Consequently, an increased amount of general computer data, as well as sound and video data, can be stored on an optical disk. In addition, continuous audio and video data can be recorded on an optical disc of according to the present invention, since the use of a fixed clock signal to determine the directions of the sectors is not implemented.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Having described the invention as above, property is claimed as contained in the following

Claims (11)

1. An optical disc comprising: a plurality of sectors on a guide track, each of the sectors has an ID field (ID1, ID2, ID3, ID4), a field for recording the information PROTECTION 1, VFO, PS, DATA , PROTECTION 2), and a field not registered with the information (MIRROR, HOLLOW OR EMPTY, SEPARATION) between the ID field and the information record field, the information record field includes grooves and areas without record that oscillate at a single frequency in a radial direction with respect to the guide track; characterized in that the ID field includes a plurality of address information recorded in the concave and convex signals and distributed in two sets, each set being offset by approximately 1/2 the track spacing between the grooves and the non-engraved areas in the direction of one of an inner and outer circumferential track adjacent to the guide track, and the grooves and unrecorded areas alternating on each turn of the guide track.

2. An optical disk according to claim 1, characterized in that when the information recorded in a period of the grooves _and the non-recorded oscillating areas is w bit, the unregistered field with the information between the ID field and the record field of the information have a length of at least one (i) w / 10 bits or more and (ii) w bits or less.

3. An optical disk according to claim 1, characterized in that the information in the recording field starts with a spec phase of the oscillating frequency.

. An optical disk according to claim 1, characterized in that each sector has a length corresponding to a multiple of the integer number of the oscillating frequency, and an integer number of the detectors is contained in each turn of the guide track.

5. An optical disk comprising: a plurality of sectors on a guide track, each of the sectors has an ID field (ID1, ID2, ID3, ID4) and a field for recording the information PROTECTION 1, VFO, PS, DATA , PROTECTION 2), the ID field includes a plurality of address information, and is recorded in concave and convex signals, the information recording field comprises grooves and unrecorded areas that oscillate at a single frequency in a radial direction with respect to the guide track; characterized in that the grooves and the unrecorded areas alternate at each turn of the guide track, each of the sectors having a length corresponding to a multiple of the whole number of a period of the oscillating frequency, a whole number of the sectors. is contained in each "turn of the guidance track, the initial oscillating phase of each turn of the guidance track is within + n bits of the information bits, and the final phase is within + m bits, where n and m are natural numbers and n is less than or equal to m.

6. An optical disk according to claim 5, characterized in that the plurality of information of the direction "in the ID field is distributed in two sets, each set is off-center at approximately 1/2 of the track spacing between the rows. and the unrecorded areas in the direction of an inner and outer circumferential track adjacent to the guide track.

7. An optical disk according to claim 5, characterized in that the plurality of the address information in the ID field is placed in the guide track.

8. An optical disk according to claim 5, characterized in that when a period of the oscillating frequency contains w bits of the information bits, the value of the final phase m is within m < w / 10 bits.

9. An apparatus for manufacturing an optical disk comprising: means for generating the ID signal to generate a signal for an ID field, a means for generating the spec signal for generating a signal in a different portion of the ID field;, a means of generating the oscillating signal to generate a signal oscillating at a single frequency, a means of generating the timing signal to generate a signal of selection of the specific timing, a first means of selecting the signal to receive a signal. ID signal and the specific signal and enables one of them by the timing signal, characterized by a means of generating the deflection signal to issue a deflection signal for deviating the ID field by approximately 1/2 of the track spacing, between the notches and the unrecorded areas, towards the inner circumferential side of a track, a second means of selecting the signal to receive an oscillating signal and making outputting a deflection signal and enabling any of them by means of the timing signal, a deflection means for receiving the output of the second signal selection means and deflecting a light point, and a readjusting means for readjusting the phase of the oscillating signal in each revolution of the optical disc.

10. An optical disk manufacturing apparatus, comprising: means for generating the ID signal for generating a signal for an ID field, a means for generating the specific signal to generate a signal in a different portion of the field of ID, a means of generating the oscillating signal to generate an oscillating signal at a signal frequency, a means of generating the timing signal to generate a cyclic disconnect signal of the specific timing, a first means of selecting the Signal to receive an ID signal and the specific signal and enable one of them by the timing signal, characterized by a means of adjusting the diameter of the light spot to change the size of a light spot receiving the timing signal, an on / off control means for enabling the wobble signal by the timing signal, a means of deflection for receiving the output of the ignition / off control means and deflecting the light spot, and a resetting means to readjust the phase of the oscillating signal in each revolution of the optical disc.

11. An optical disk, comprising: a ROM field having information with a length of at least one track formed in rows with concave and convex depressions; a rewritable field capable of rewriting information with a length of at least one track; an unregistered field with information that has a length of at least one track placed between the ROM field and the field that can be rewritten, the field that can be rewritten has a spiral or concentric guide track that oscillates in a radial direction, the field of the ROM has rows with concave or convex, spiral or concentric depressions; characterized in that at least a part "of the field side that can be rewritten of the field is not recorded with the information, has a transition field having a spiral or concentric guide track that oscillates in the radial direction continuously or intermittently; wherein a spacing To of the track of the ROM field and a spacing of the track between the grooves and the unrecorded areas Tw or the field that can be rewritten, has values such that To > Tw.