CN1992041A - Record reading method and device of high-density compact disk - Google Patents

Abstract

The invention relates to a record reading method and device of high-density disc, specially the data record reading method and device using physical access control (PAC) in high-density disc such as blue-ray disc. The high-density disc of the invention is divided into at least one PAC area which can record PAC, in PAC recorded in said PAC area, with logic superposition record of one PAC control disc, it can record data effectively in high-density disc.

Description

The record reading method of high density compact disc and device

Technical field

The present invention relates to a kind of high density compact disc, relate in particular to a kind ofly on, utilize data recording read method and the device of PAC such as Blu-ray Disc high density compact discs such as (Blue-ray Disc).

Background technology

As optical recording media, the CD that can write down Large Volume Data is widely used.Recently, but the novel high-density optical recording media (HD-DVD) of non-volatile recording and storage high image quality video data and high tone quality voice data for example Blu-ray Disc (blue-ray disc is hereinafter to be referred as BD) also be developed.

HD-DVD technology of future generation, promptly Blu-ray Disc BD also is applied to recently on other digital instrument, and produces the technology of international standard gradually as having the optical recording solution of new generation that significantly improves the record data function.

Relevant therewith, above-mentioned various standard schemes about Blu-ray Disc BD are suggested, after erasable Blu-ray Disc BD-RE, about the various standard schemes of the Blu-ray Disc BD-ROM that only Gong reads after disposable recording Blu-ray Disc BD-WO and the end of record (EOR) also are suggested.

Carrying out in the process of this normalization period, recently, to in redaction (version), introduce under the situation of the new function of Blu-ray Disc, in the driver of supporting original version, in order to solve problem, PAC (access control of physical access control physics) method has just been proposed because of not supporting that the redaction function produces.At present, discussing and utilizing this PAC, at the physical region (physical area) of CD the record of the data on whole CD or the specific region is being read (read/write) and several different methods such as control.

Summary of the invention

Therefore, the present invention proposes for addressing the above problem just, and the object of the invention is, on high density compact disc, provides utilization PAC data recording reading device and the method for method.

Another object of the present invention is, in high density compact disc, particularly in the high density compact disc of disposable recording, proposes the PAC effective management method of the overlapping record of steering logic (hereinafter to be referred as LOW).

To achieve these goals, the record reading method of high density compact disc of the present invention, it is characterized in that, the PAC zone that on high density compact disc, is divided into above-mentioned write down a physics access control (hereinafter to be referred as PAC) at least, in the PAC of above-mentioned PAC regional record, the overlapping record of the logic of utilizing a PAC to control CD.

The recording method of high density compact disc of the present invention, coming that according to the instruction of main frame data recording is read method on the high density compact disc, it is characterized in that, recording storage comprises the management information of the PAC information on the high density compact disc, if in above-mentioned PAC information, to the PAC sign overlapping record of (hereinafter to be referred as PAC-ID)=logic (hereinafter to be referred as LOW), be PAC, can not discern above-mentioned PAC-ID, just come the overlapping record of steering logic according to the unknown (Unknown) PAC rule that writes down among the above-mentioned PAC.

In addition, to achieve these goals, comprise according to the record reading device of high density compact disc of the present invention: read with the store high-density CD in the storer of PAC information; If in above-mentioned PAC information, to PAC-ID=LOW, promptly PAC can not discern PAC-ID, just controls the microprocessor of overlapping record according to the unknown (Unknown) PAC rule that writes down among the above-mentioned PAC.

Effect of the present invention:

In sum, the record reading method of high density compact disc of the present invention and device have following effect.

The first, it is that the overlapping record control method of logic is carried out in a kind of zone according to PAC management on the CD, therefore, just can write down effectively and reading of data on high density compact disc.

The second, the PAC of data area or segment area can write down and reading of data on CD effectively on the utilization management CD.

For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.

Description of drawings

Fig. 1 a is the synoptic diagram in the PAC zone of high density compact disc of the present invention to Fig. 1 b;

Fig. 2 is information 2 zones of high density compact disc of the present invention and the formation synoptic diagram in information 1 zone;

Fig. 3 is in high density compact disc of the present invention, the structural representation of record PAC on the CD;

Fig. 4 is the formation synoptic diagram of high density compact disc PAC of the present invention;

Fig. 5 is the synoptic diagram of high density compact disc segment area of the present invention;

Fig. 6 is the synoptic diagram that " Unknown PAC Rules " of the present invention (well-behaved PAC rule) zone constitutes;

Fig. 7 a is the synoptic diagram of the overlapping recording method of logic of disposable recording high density compact disc of the present invention to Fig. 7 b;

Fig. 8 is the synoptic diagram that high density compact disc PAC of the present invention zone constitutes;

Fig. 9 is the synoptic diagram that constitutes according to " Unknown PAC Rules " of the present invention field;

Figure 10 is the synoptic diagram that video disc recording reading device of the present invention constitutes.

The symbol description of major part in the accompanying drawing:

10: record reading part 11: pick-up

12: interface 13: data processor

14: servomechanism 15: storer

16: microprocessor 20: main frame or control part

Embodiment

Below with reference to accompanying drawings the record reading method of high density compact disc of the present invention and the embodiment of device are elaborated.Simultaneously, the term that uses among the present invention all is the term that is widely used present stage generally speaking.But, because the appearance of new technology, also use some to think optimal term among the present invention, simultaneously, the present invention offers some clarification in the meaning of relevant declaratives to these neologisms.Therefore, understand when of the present invention, term is not the term name of simple meaning, but needs to be grasped explanation of the present invention.

Relevant therewith, the meaning of the PAC that uses among the present invention (access control of physical access control physics) is in the physical region of CD, read the control purpose, the additional information that just on CD, writes down (additional information) in order to reach the data on whole CD (entire disc) or specific region (segment) are write down.In the present invention, for convenience of description, be called " PAC " or " PAC information " or " PAC control information " etc., their meaning is all identical.

Therefore in addition, for convenience of description, the disc area of the above-mentioned PAC of record is called " PAC zone " (PAC zone), above-mentioned PAC carries out record with bunch (cluster) unit in the PAC zone on CD, writes down bunch just be called " PAC bunch " of above-mentioned PAC.

Moreover,, just used at whole CD or specific region inner control and write down " Unknown rule " (unknown rule) that reads (read/write) for the incompatible driver that comprises the specific PAC-ID of existing version driver according to PAC of the present invention.The PAC of above-mentioned suitable Unknown rule simply is called UnknownPAC.Known above-mentioned specific PAC sign (PAC-ID), this Known rule (known regimes) that in PAC, writes down, promptly the suitable PAC of PAC specifying information (PAC specific information) just is called Known PAC for convenience of description.

The form that this kind PAC is write down in the PAC zone and utilize it to carry out method and device that data recording reads to describe below with reference to accompanying drawings.

Fig. 1 a is the synoptic diagram in PAC zone in the high density compact disc of the present invention to Fig. 1 b.

At first, as shown in Figure 1a, on the individual layer that a recording layer is arranged in high density compact disc (single laver) CD, roughly be divided into ingress area (lead in zone), data area (data zone), export area parts such as (lead out zone) successively to peripheral direction from the interior week beginning of CD.

In above-mentioned ingress area, be divided into information 2 (info 2) zone and information 1 (info 1) zone of the various management information that writing down CD.In above-mentioned information 2 zones and information 1 zone, the zone according to PAC of the present invention is arranged respectively.

At this moment, the PAC zone that is allocated in information 2 zones simply is called PAC 2 zones, the PAC zone that is allocated in information 1 zone simply is called PAC 1 zone.The PAC of record is situations such as reply power failure suddenly in above-mentioned information 1 zone and information 2 zones, the record identical information, the PAC of record at first upgrades (update) in PAC 1 zone in above-mentioned information 1 zone, and its version that duplicates is recorded in PAC 2 zones of information 2 simultaneously.

In addition, with reference to Fig. 1 b, it is the synoptic diagram that expression has the double-layer CD structure of two recording layers, shown in Fig. 1 b, double-layer CD is divided into the 1st recording layer (L0:layer0) and the 2nd recording layer (L1:layer1), is divided into again respectively importing/go out zone (also being called inner region inner zone) (lead in/outzone), data area (data area), exterior domain (outer zone 0,1) on each recording layer.

In above-mentioned ingress area (inner region 0) and export area (inner region 1), be divided into information 2 (INFO 2) zone and information 1 (INFO 1) zone of the various management information of recording disk again.In above-mentioned each information 2 zones and information 1 zone zone according to PAC of the present invention is arranged respectively.

At this moment, the same with single-layer optical disc, the PAC zone of distributing in information 2 zones with above-mentioned importing and export area simply is called PAC 2 zones, and the PAC zone of distributing in information 1 zone with above-mentioned importing and export area simply is called PAC 1 zone.The PAC information of record is identical in PAC 1 zone of above-mentioned information 1 and PAC 2 zones in information 2 zones.Simultaneously, at first the PAC to record in PAC 1 zone of information 1 upgrades (update), then it is duplicated version and records in PAC 2 zones of information 2.

At this moment, shown in Fig. 1 b, under the situation of double-layer CD, not only there is ingress area in above-mentioned PAC 1 and PAC 2 zones, and also have the export area, therefore, compare with single-layer optical disc, and its size is the twice of single-layer optical disc.

Above-mentioned PAC zone as mentioned above, the zone of reading (read/write) as the record of the data in control whole CD or the specific region, it is characterised in that, has " Unknown rule " (unknown rule) that the record for the driver of controlling this process reads.

In disc area, be divided into DMA (disc managementarea CD managing zone) zone, zones such as backup zone (spare area), user data area (user data area) according to above-mentioned " Unknown rule " management.Especially for user data area, it is divided into the regulation zone of suitable " Unknown rule " again, i.e. fragment (segment) zone.(narration that the more detailed description item of relevant above-mentioned segment area is seen below)

Promptly, utilize " Unknown rule ", definition is to the above-mentioned predictable operations of enumerating the zone, for example, be intended to control from basic operations such as executive logging read, the rule (rule) of the overlapping record of logic (logical overwrite) of the CD BD-WO of linearity of defect area alternative (linear replacement) and disposable recording.

Therefore, " Unknown rule " by the PAC that writes down in the above-mentioned PAC zone, may occur just can effectively being solved under the situation of the problem that the driver additional function of redaction is not identified in the existing version driver (for example: unnecessary read etc.).And, so just can play the effect of strengthening protection to the zone of record data defining in the physical region of addressable zone on CD, also can cut off outside rogue attacks (hacking) (more detailed description of this PAC is seen following narration).

In the ingress area (comprising the export area under the situation of double-layer CD) that above-mentioned PAC 2 zones and PAC 1 zone are arranged, the effect in and information 1 zone regional to information 2 can the record characteristics be done following elaboration according to high density compact disc.

Fig. 2 is information 2 zones of high density compact disc of the present invention and the formation synoptic diagram in information 1 zone.

As shown in Figure 2, be that information 2 zones are by comprising DMA of the present invention 32 bunches (defect management area defect management) 2 zones under the situation of erasable high density compact disc BD-RE at high density compact disc; 32 bunches CD (control data), 2 zones of record controls information; The buffer area i.e. 256 bunches of formations such as BZ (buffer zone) 3 zones of 32 bunches.

In addition, information 1 zone is 32 bunches BZ (buffer zone) 2 zones by buffer area 2; Be i.e. 32 bunches the driving district (drive area) of the driver region of the intrinsic customizing messages of memory driver; Defect management 1 i.e. 32 bunches DMA 1 zone; 32 bunches CD 1 zone in record control data district 1; According to formations such as PAC of the present invention 1 zones.

In addition, under the situation of the high density compact disc BD-R of disposable recording, in information 2 zones by comprising the PAC2 zone that has 32 bunches respectively, defect management 2 (DMA2) zone, zone, record control data district 2 (CD2), 256 bunches of formations such as zone, buffer area 3 (BZ3).Information 1 zone is by comprising the BZ zone that has 32 bunches respectively, DMA1 zone, CD1 zone, 256 bunches of formations such as driver region of PAC1 zone and 128 bunches.

Moreover under the situation of read-only high density compact disc BD-ROM, information 2 zones are by comprising the PAC2 zone that has 32 bunches respectively, CD2 zone, 256 bunches of formations such as BZ3 zone.Information 1 zone is by comprising 256 bunches of formations such as the CD1 zone that has 32 bunches respectively, PAC 1 zone.

Therefore, according to the write down characteristics of high density compact disc, information 2 sizes regional and information 1 zone of PAC of the present invention zone in ingress area are 32 bunches.

Simultaneously, under the situation of the double-layer CD that two recording layers are arranged, not only there is ingress area in the PAC zone, and also has the export area, and the size in 1 PAC zone is 64 bunches.

In PAC zone with above-mentioned 32 bunches (or 64 bunches) size, make a PAC have 1 bunch of size and divide, can there be several in the PAC that has 1 bunch of size as required simultaneously.With reference to Fig. 3 above-mentioned 1 state that PAC writes down with 1 bunch of size is described.

Fig. 3 is in high density compact disc of the present invention, and PAC is recorded in the structural representation on the CD.

As shown in Figure 3, have 1 PAC of 1 bunch (32 frame frame are identical with the notion of sector sector) size by big title (header) zone and intrinsic customizing messages (specificinformation) the zone formation of disc drives.

At this moment, in the Title area of above-mentioned PAC, first frame of PAC is divided into 384 bytes, and it is writing down the various PAC information such as information of " Unknown PAC rule " and relevant fragment.In remaining zone, writing down " Unknown rule ", i.e. the intrinsic customizing messages (PAC specific information) of PAC.

Be elaborated with the more detailed formation of the above-mentioned PAC of this kind state recording with reference to Fig. 4.For convenience of description, be described in more detail necessary specific fields for above-mentioned PAC, reference table is shown with the chart that closes fragment and describes and set forth.

Fig. 4 is the formation synoptic diagram of the PAC of high density compact disc of the present invention.

As shown in Figure 4, described according to PAC of the present invention, the zone that it roughly is divided into title (header) zone (384 bytes of first frame) and writes down the intrinsic customizing messages (specific information) of PAC.

Above-mentioned Title area is by " the PAC ID " of 4 bytes; " PAC update count " (the renewal quantity) of 4 bytes, " the entire disc flag " of 1 byte (all CD marks), " number ofsegments " (field number) of 1 byte each has 8 bytes, amounts to " field " (segment_0～segment_31) constitute of 32.

Above-mentioned PAC-ID is as the field that present PAC state and cognizance code are provided, when for example writing down with 00 00 00 00h, present PAC state is exactly not use, when writing down with FF FF FF FFh, then be expressed as present PAC zone past attempts and be used, but also can reuse.

In addition, when writing down, but the present driver code whether free access is confirmed is used with regard to conduct with prior bits of arranging such as 54 53 54 00h.Promptly as mentioned above, when present driver is not known the PAC-ID that imports, just being judged as with the reason of version difference and so on can not compatible existing PAC, uses as the message code with reference to " UnknownPAC rules " field record.

Above-mentioned " PAC update count " field is recorded as 0 at first as the field of the update times of expression PAC, and when PAC write down at every turn again, its number of times all can increase by 1 time automatically.

Moreover whether it doesn't matter in the distribution of the segment area of above-mentioned " entire disc flag " field and " Unknown PAC ", and it is applicable to the Zone Full of CD, uses as expression whether allow the to reinitialize field of (re-initialization).For example, 1 bit in 1 byte (8 bit) of distributing in above-mentioned " entire disc flag " field, promptly b0 under 0 the situation, then is expressed as and allows initialization once more, is under 1 the situation as above-mentioned b0, then is expressed as not allow to reinitialize.Simultaneously, this initialization also is applicable to the high density compact disc of re-recordable.

In addition, above-mentioned " number of segment s " field list is shown the field of the segment area quantity that is suitable for PAC.Above-mentioned fragment can be divided into 32 subregions at most in 1 PAC, " segment_0 " that the information of above-mentioned relevant fragment position is recorded in 8 bytes respectively arrives in the field of " segment_31 ".In above-mentioned " segment_0～31 " field, write down the 1st bunch first physical sector number (PSN:physical sector number) of segment area on separately preceding 4 bytes, writing down in the segment area last bunch last physical sector number on ensuing 4 bytes.

Below the more detailed situation about above-mentioned fragment is elaborated by chart.

Fig. 5 is the segment area synoptic diagram of high density compact disc of the present invention.

As shown in Figure 5, in high density compact disc, be applicable to that the segment area of PAC can be divided into as required in order from " segment_0 " fragment, can be divided into 32 fragments at most.Promptly the fragment of a PAC management begins upwards can be divided into 32 fragments at most from " segment_0 ".Under the situation of several PAC coexistences, total number of the segment area of PAC management can not be above 32 separately.(CD can have 32 segment area at most)

At this moment, the starting position of the segment area of above-mentioned distribution is as first bunch first physical sector number (thefirst PSN of the first cluster), the rearmost position is as last bunch last physical sector number (thelast PSN of the last cluster), be recorded in fragment field, make CD drive can grasp the position of segment area.

At this moment, each other can overlapping (overlap) according to the segment area of a PAC allocation manager, beginning and rearmost position all are assigned the police circles zone between bunch (cluster).

In addition, " Unknown PAC rules " field of Fig. 4 is used as the field of specifying driving opereating specification that can not compatible existing P AC as mentioned above, with reference to Fig. 6 its using method is described.

The synoptic diagram that Fig. 6 " Unknown PAC Rules " of the present invention segment area constitutes.

As shown in Figure 6, just can define by " Unknown PAC Rules " field the whether controlled of each zone in the CD with 4 bytes (32 bit) expression.At this moment, " zone (Area) " on the CD is expressed as the controllable areas of CD, and " bit (bits) " is control bit, and " control types (control type) " is expressed as state of a controls such as record/read.

By this method, from the zone of control of above-mentioned " Unknown PAC Rules " field, at first, to information 1,2,3, relevant DMA zone (the DMA Zone that exists in 4 districts, do not comprise DDS:disc definitionstructure disc definition structure)) record can limit, can read the record in the backup zone in the data zone and limit, can be to information 1,2,3,4 region memories the record in control data zone (CD, controldata zones) read and limit.Also can read simultaneously and limit, also can read and limit PAC bunch the record in information 1,2 zone to the record of the user data area (user dataarea) in data zone.

At this moment, the remaining zone except that above-mentioned PAC bunch is suitable for following rule.

That is, above-mentioned controllable state (control type) for the record (write) situation (for example: bits=b3, b5, b6, b7 ...) under, if the bit that distributes is set to 0, just can carry out record,, just can not carry out record domain of dependence if the bit that distributes is set to 1 to domain of dependence.

In addition, with above-mentioned controllable state be situation about reading (for example: bit=b2, b4 ...), corresponding, if the bit of distribution is set to 0, just domain of dependence is read, the bit of distribution is set to 1, just can not read domain of dependence.

Corresponding with above-mentioned PAC bunch zone, be under the situation about writing down (bits=b1) when controllable state, if the bit that distributes is 0, just can carry out overlapping record to relevant PAC, if the bit that distributes is 1, just can not carry out overlapping record to relevant PAC.

For above-mentioned PAC bunch zone, in above-mentioned controllable state is under the situation about reading, (bits=b0) be 0 as the bit that distributes, just being expressed as bunch content that reads can transmit to driver outside (for example main frame), if the bit of above-mentioned distribution is 1, PAC bunch the content that just is expressed as first 384 byte (being the PAC title division here) except that first Frame just can not be to the outside transmission of driver.Then, it can only be set the control situation of CD with " Unknown rule ".

At this moment, under the situation of above-mentioned user data area (user data area), as mentioned above, if the specific region on the CD is defined as segment area, this specific region is not the whole of user data area just, but with to the record of segment area with read the whether controlled field of representing and use.

Utilize " the Unknown PAC rule " of definition like this, read in the control at record CD integral body or segment area, particularly in disposable recordable high density compact disc, the control method of the overlapping record of this logic (LOW:logical overwrite) is described.For this reason, at first overlapping recording method describes to above-mentioned logic.As according to of Known PAC of the present invention, describe with the method for control LOW PAC.

But Fig. 7 a is the synoptic diagram of the overlapping recording method of logic of the high density compact disc of disposable recording of the present invention to Fig. 7 b.(for convenience of description, be that example describe with single-layer optical disc) with a recording layer

At first, shown in Fig. 7 a, under the situation of the high density compact disc BD-WO of disposable recording, it is divided into ingress area (lead-in zone), internal layer backup area 0 (ISAO:irner spare area 0), user data area (user data area), outer backup area 0 (OSAO:outer spare area 0), export area (lead-out zone) etc.Can repeatedly upgrade (update) according to the records management information that writes down in the high density compact disc of this disposable recording according to the needs in the use of CD.

Therefore, as being intended to the disc management information field that record can repeatedly upgrade on the above-mentioned CD, be provided with interim CD managing zone (TDMA:temporary discmanagement area is hereinafter to be referred as TDMA) in the above-mentioned ingress area (lead-in zone).In above-mentioned TDMA, writing down temporary defect catalogue (TDFL:temporary defect list is hereinafter to be referred as TDFL).Above-mentioned TDFL is by actual defects zone or writes down the defective directory items (defectlist entry) that several DFL records of management information such as positional information in the zone of overlapping record constitute.

In the CD that so distributes, in above-mentioned data area, have under the situation of end of record (EOR) zone (originalrecorded data), domain of dependence carries out the overlapping record of physical property with regard to not allowing on the CD of disposable recording.

But, shown in Fig. 7 a, require according to the record order of the main frame of customer requirements etc. will use this recording method on other zones in the data area under the situation of a-quadrant (end of record (EOR) zone, that is, original recorded area) executive logging.

Therefore, main frame will assign with CD in the end of record (EOR) incoherent record order whether of specific region.Even disposable recording optical disc, the CD that the user can be used as re-recordable uses.Distinguish mutually with the overlapping record of the logic of re-recordable optical disc, it just is named as the overlapping recording mode of logic (LOW:logical overwrite).

Promptly shown in Fig. 7 a, carry out the record order of relevant a-quadrant because the part of the rational end of record (EOR) of existence, just can not be in the relevant range overlapping once more record.But the user area (user data area) that it can be recorded in information concerning order in the data area (data zone) is on the B zone.Simultaneously relevant management information is recorded in as TDFL information in the TDMA of CD, with the end record order.

In this case, Bi Yao overlapping records management information will be handled the alternative form (CRD:consecutive re-allocation defect) of continuous defect bunch.That is, find defect area as the a-quadrant of finishing at physical record, the data that will be recorded in the above-mentioned zone substitute the B zone that is recorded in the user data area.

Under the situation that connection defect cluster (CRD) form (type) occurs, the management information that writes down on TDMA will be used two DFL projects so that it can show.Shown in Fig. 7 a, in " status 1 " of project field, as with DFL corresponding items information separately, whether replace the information that writes down (for example: with relevant if 0000, just mean that defect area is to replace the RAD:Re-allocation defective form of end of record (EOR) or the DFL project of CRD:consecutive re-allocation defect normally, if 0001, though just mean the defectiveness zone, but can not specify the DFL project of the NRD:Non-real locatable defect form that replaces regional record) carry out record.In " defectivecluster first PSN " field, to produce defective bunch positional information carry out record, at this moment, above-mentioned positional information is with first physical sector number (the PSN:physical sector number) record as relevant bunch.

In addition, in " status 2 " field, with above-mentioned " status 1 " field (for example: under 0000 situation to the form of each DFL project and attribute information, just be illustrated in the situation that occurs defective on bunch, under 0001 situation, just expression has the beginning of several defect clusters, under 0010 situation, the end of several defect clusters is arranged with regard to expression) carry out record, in " replacement cluster first PSN " field, writing down the positional information in the zone that replaces the defect area record.At this moment, above-mentioned positional information is carried out record with relevant bunch the first physical sector number PSN.

In addition, in " status 1 " of using the another one project and " status 2 " field, can show that information such as each DFL project form are (particularly in the field of " status 2 " of second project, writing down and to know 0010 bit that a consecutive numbers defect cluster reaches alternative bunch rearmost position), in " replacement clusterfirst PSN " field, in the zone position information of replace defective regional record, writing down last bunch the first physical sector number PSN.

Structure is corresponding therewith, utilize according to project data bag of the present invention, under the situation of Fig. 7 a that represents overlapping recording method, for example on " status 1 " of first project (DFL entry 1) field, writing down sign and substituting 0000 of record, first physical sector number that is writing down defect cluster in " defective cluster first PSN " field is a.

In addition, on " status 2 " field, writing down and indicate 0001 of continuous defect bunch beginning, on " replacement cluster first PSN " field, first physical sector number that is writing down the record position in replace defective zone is c.

In " status 1 " of second project (DFL entry 2) field, write down sign and substituting 0000 of record, in " defective cluster first PSN " field, writing down last bunch the first physical sector number b of defect cluster.In " status 2 " field, writing down and indicating 0010 of continuous defect bunch end, on " replacement cluster first PSN " field, write down the replace defective zone and writing down the first physical sector number d of last bunch of position.

Therefore, read in requirements such as main frames under the situation of a-quadrant according to customer requirements later, will and can carry out reading with reference to the information that writes down in the TDMA zone to the B zone.

In addition, based on the overlapping recording method of this logic, at alternative posting field is under the situation of user data area, in the recording mode of disposable recording high density compact disc, promptly in SRM (sequential recordingmode continuous recording pattern) recording mode, open existing recorded track (track), but will produce following posting field, be i.e. NWA (next writable area).Promptly produce the overlapping record of above-mentioned logic at following recordable regional NWA.After the overlapping end of record (EOR) of above-mentioned logic, but the next zone in end of record (EOR) zone will become next posting field (NWA).

Therefore, under the situation that the track of the overlapping record of actuating logic is closed, the overlapping record of above-mentioned logic will form the backup zone in the data area, and the situation with any one RRM (any logging mode of random recording mode) recording mode in the recording mode of disposable recording high density compact disc is identical.This is described with reference to Fig. 7 b.

Shown in Fig. 7 b, the overlapping record of logic has formed the backup zone (sparearea) in the data area (data area), the track that is the overlapping record of actuating logic is closed, or data are recorded in CD not in the situation of the RRM recording mode that arbitrarily forms of posting field, as the backup zone and the overlapping record of actuating logic.

Therefore, be that data on the a-quadrant are replaced to the regional enterprising line item of backup being recorded in the zone of having write down on the CD, the information of this replacement record is identical with the method for Fig. 7 a, and it is recorded in the TDMA zone as the DFL project.

According to the present invention,, just be made as physics access control the sign overlapping record of (PAC-ID)=logic (LOW), i.e. LOW PAC for controlling the overlapping record of this logic.In a PAC zone, can there be several effective PAC simultaneously as required.One of them PAC can use it as the PAC that comprises the control information that relevant logic is overlapping, and this is described with reference to chart.

Fig. 8 is in the high density compact disc of the present invention, the synoptic diagram that the PAC zone constitutes.

As shown in Figure 8, in a PAC zone having only 32 bunches of sizes (the PAC zone of INFO2 or INFO1), be provided with several effective PAC (valid PAC) and several PAC that does not note as required, utilize above-mentioned effective PAC to manage whole CD or the maximum zone that can be divided into 32 fragments with 1 bunch of size.

At this moment, above-mentioned effective PAC just is named as effective PAC (valid PAC) owing to comprise the said zone of setting various PAC information in the past.A PAC zone with effective PAC of 1 bunch of size can maximum be divided into 32 subregions.(maximum can be divided into 64 subregions in the double-layer CD)

Above-mentioned effective PAC as mentioned above, according to the version of CD-ROM drive of record PAC, it have prior agreement PAC-ID (for example when PAC-ID=54 53 54 00h for convenience of description, represent with A or B on the chart).In this effective PAC, comprise PAC-ID=PRM, promptly main PAC " primary PAC " and foundation PAC-ID=LOW of the present invention, just " LOW PAC ".Relevant therewith, a kind of in above-mentioned " primary PAC " conduct " Known PAC " is the PAC of the relevant date information when having the CD initialization and the id information of recording a video.

Therefore, in the driver of above-mentioned PAC-ID=LOW, if carry out the overlapping record of normal logic, also can insert the control information of the overlapping record of logic of relevant specifying information, for driving this information, be the information definition of the overlapping record of the above-mentioned logic of control " Unknown PAC rule " just, this is described with reference to Fig. 9.

Fig. 9 is the synoptic diagram that " Unknown PAC Rules " of the present invention field constitutes.According to the present invention, in " the Unknown PAC Rules " field that constitutes as Fig. 9, it is characterised in that, the record controls bit of " PAC Cluster ", " Userdata area ", " Control data zones ", " DMA Zones " field is forced to be set at 1.

That is, the bit 1,3,5,7 of " Unknown PAC Rules " field is forced to be set at 1.So just can not carry out record to domain of dependence.Therefore, also just can not the overlapping record of actuating logic.

At this moment, in the situation of regional record controls whether " spare areas " field of expression backup, just can not force to be set at 1.Under the situation in backup zone, the defect management that can produce defect area when reading is very important.In addition, under the situation in allocated segment zone, it is to come the overlapping record of steering logic by above-mentioned " LOWPAC " in user data area.Therefore, just may carry out the overlapping record of logic to the zone except that above-mentioned segment area.Same cause, in the situation of expression to record controls whether " DMA Zones " field in above-mentioned DMA zone, it does not comprise the DDS zone.

All the other PAC zones of not writing down above-mentioned effective PAC are that 00 00 00 00h or FF FFFF FFh can write down under the situation of PAC at PAC-ID, and not writing down the PAC zone will not keep as writing down PAC zone (unrecorded PAC).

In addition, in a PAC (PAC zone), if will write down the zone of PAC defective taking place, will use the method for next zone interior record PAC of above-mentioned defect area.Above-mentioned defective may be to produce owing to the damage of optical disc surface or pollution.These defectives occur under the situation in record PAC zone, just use the next zone that defect area takes place to write down PAC information.

Figure 10 is the synoptic diagram that embodies the video disc recording reading device formation of embodiments of the invention technological thought.

As shown in figure 10, the record reading part (recording/reproducing device) 10 that reads by record on CD 1 according to optical recording and reading apparatus of the present invention; Main frame or the control part (host orcontroller) (hereinafter to be referred as main frame) 20 of controlling this process constitute.(above-mentioned record reading part 10 also is called CD-ROM drive, in the present invention these two speech is used alternatingly)

That is, above-mentioned main frame 20 is assigned in the specific region at CD to record reading part 10 and is write down reading order, and above-mentioned record reading part 10 is carried out the record in the specific region according to the order of main frame 20 and read.

At this moment, above-mentioned record reading part 10 is specifically by obtain the interface portion 12 that data and order come executive communication (communication) task from main frame 20; The directly record or the pick-up 11 of reading of data on CD; Signal that reception is sent from pick-up 11 and the data processor 13 that signal value is restored or the signal that CD writes down is regulated (modulation) and transmitted; Correctly read on the CD signal or on CD correctly tracer signal control the servomechanism 14 of pick-up 11; Storage comprises the storage part 15 of the various information and the data of management information; The microprocessor 16 of serving as each inscape in the above-mentioned record reading part 10 of control constitutes.

Utilize the light fetch recorder that constitutes like this, be described as follows writing down the method that realizes on the high density compact disc according to PAC record of the present invention.

Beginning if CD is inserted in the optical recording and reading apparatus, will be read all management information on the CD, and is stored in the storer of record reading part 10 inside.These management information will be used when video disc recording reads.

Under this state, under the situation that the user will write down in the specific region of above-mentioned CD, above-mentioned main frame 20 will be communicated to positional information that will write down and data in the above-mentioned record reading part 10 together according to this record order.

Microprocessor 16 in the above-mentioned record reading part 10 receives above-mentioned record order, and the management information of storer 15 stored is confirmed whether the zone that main frame 20 will write down is defect area on CD.Just carry out data recording if not defect area according to the record order of above-mentioned main frame 20.

At this moment, the microprocessor 16 of above-mentioned record reading part 10 is according to user's requirement, to in whole CD or specific region, limit under the situation of record or read functions, and not having new function to judge under the situation of record reading device nonrecognition of existing version in the record reading device because of existing version (version), the control information of relevant above-mentioned zone will the PAC zone (PAC zone) on CD be gone up carry out record with " Unknown PAC rule ".

Above-mentioned PAC information is according to the needs in PAC 1 zone in information 1 zone, as having several effective PAC (valid PAC), carry out record with 1 bunch size respectively, in the PAC2 zone in information 2 zones, use as supporting (back-up), the version that duplicates of the PAC of record in above-mentioned PAC 1 zone is carried out record.

At this moment, particularly main frame 20, and for driving under the situation that incompatible version writes down the control project of the overlapping record of logic, the bit 1.3.5.7 of above-mentioned " Unknown PAC rule " is forced to be set at 1, PAC-ID is set to LOW, has generated LOW-PAC in proper order.

For this reason, above-mentioned microprocessor 16 is just passed on the positional information in the zone of the above-mentioned data of record or PAC zone and data to servomechanism 14 and data processing division 13.And, on the relevant position of CD, finish relevant record by pick-up 11.

In addition, describe with the record reading method of identical method the high density compact disc of record PAC.

Beginning if CD is inserted in the optical recording and reading apparatus, will be read all management information on the CD, and is stored in the storer that writes down in the reading part 10.These management information will be used when video disc recording reads.

At this moment, the various zone position informations that comprise the PAC zone etc. of CD in the information of above-mentioned storer 10 stored.Afterwards, the PAC-ID in above-mentioned PAC zone is confirmed, simultaneously also to whether being that discernible PAC-ID confirms.

Is under the discernible situation in above-mentioned affirmation result for the PAC-ID of record, and the record reading device that is judged as the CD identifying recording layer is identical with version, or does not have other record reading device, according to the command execution record of main frame 20/read.

Under the situation that the code that writes down in above-mentioned PAC-ID is not identified, will be judged as the enterprising line item of device with different editions and so on reason and limit record and read.At this moment, read restricted area, and read according to the command execution record of main frame 20 with reference to the record on the CD of record in " Unknown PAC rule " and " segment ".

At this moment, particularly, will carry out control to the overlapping record of logic for the driver that can not discern PAC-ID=LOW according to the present invention.

For this reason, positional information from Host Command to servomechanism 14 and data processor 13 and data that above-mentioned microprocessor 16 is passed on according to, and by pick-up 11 end record read operation on the precalculated position on the CD.

By above-mentioned explanation, those skilled in the art can carry out various change and modification fully in the scope that does not depart from the technology of the present invention thought.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.

Claims (10)

1, a kind of record reading method of high density compact disc is characterized in that:

On high density compact disc, be divided into the physics access control zone that can write down the physics access control at least, in the physics access control of above-mentioned physics access control zone record, the overlapping record of the logic of utilizing a physics access control to control CD.

2, as the record reading method of claim item 1 described high density compact disc, it is characterized in that:

Described physics access control zone is allocated in information 1 zone and information 2 zones of high density compact disc respectively.

3, the record reading method of high density compact disc as claimed in claim 1 is characterized in that:

The overlapping record of physics access control sign=logic of the overlapping record of described steering logic.

4, the record reading method of high density compact disc as claimed in claim 3 is characterized in that:

The physics access control of the overlapping record of described steering logic has the unknown physics access control rule of the driver opereating specification of the overlapping record of control nonrecognition above-mentioned physics access control sign=logic.

5, the record reading method of high density compact disc as claimed in claim 4 is characterized in that,

Described unknown physics access control rule has the information that restriction is write down defect management, control data zone, user data area, physics access control bunch zone.

6, the record reading method of high density compact disc as claimed in claim 5 is characterized in that:

The record restricted information of described user data area, the regulation zone in distributing above-mentioned user data area is under the situation of segment area, is the information to segment area.

7, the record reading method of high density compact disc as claimed in claim 6 is characterized in that:

Described segment area can be divided into 32 subregions at most in a CD.

8, the record reading method of high density compact disc as claimed in claim 4 is characterized in that:

The b1 of described unknown physics access control rule, b3, b5, the b7 bit is set to 1.

9, a kind of record reading method of high density compact disc is a kind of order according to main frame, and the method for record reading of data on the high density compact disc is characterized in that:

Read and store the management information of the physics access control information that comprises on the high density compact disc,

In above-mentioned physics access control information, can not discern for the physics access control of the overlapping record of physics access control sign=logic under the situation of above-mentioned physics access control sign, the overlapping record of logic be limited according to the unknown physics access control rule that writes down in the physics access control.

10, a kind of record reading device of high density compact disc is characterized in that comprising:

Read with the store high-density CD in the storer of physics access control information;

In above-mentioned physics access control information, can not discern the physics access control of the overlapping record of physics access control sign=logic under the situation of physics access control sign, according to the unknown physics access control rule of record in the above-mentioned physics access control, the formations such as microprocessor that the overlapping record of logic is controlled.

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