CN1979646B - Method for reading multilayer recording medium data - Google Patents
Method for reading multilayer recording medium data Download PDFInfo
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- CN1979646B CN1979646B CN200510125656.7A CN200510125656A CN1979646B CN 1979646 B CN1979646 B CN 1979646B CN 200510125656 A CN200510125656 A CN 200510125656A CN 1979646 B CN1979646 B CN 1979646B
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Abstract
The invention is a multilayer recording media and a reading method for the multilayer recording media, where the multilayer recording media at least comprises: a first recording layer and a second recording layer stacked on the first one; and the method at least comprises: 1. recording EPSA (end physical section address) of a first user region into a lead-in region; 2. when CD-ROM wants to read data from CD, firstly reading the EPSA; 3. reading the data in the first user region and judging whether they exist at the EPSA; and 4. if yes, skipping to the second recording layer; the invention is applied to recording media with multiple recording layers, increasing data storage space, providing a simple conversion formula between logic section address and physical section address, increasing speed of reading the data of the recording media and saving reading time.
Description
Technical field
The invention relates to the read method of a kind of recording medium and recording medium, particularly about a kind of read method being applied in recording medium in sandwich construction and this recording medium.
Background technology
Simple layer recording medium is bound to have certain recording capacity, but usually because capacity that is audio-visual or digital data is too large, so that simple layer recording medium cannot record whole data completely, two-layer above recording medium must be divided into record whole data, therefore whole data will be cut into plural part, be recorded to respectively in each recording layer.Along with Information technology constantly progressive and development, the CD used as recording medium has also been required more recording capacity, double-deck (dual layer) DVD CD is a kind of in response to the product under high recording capacity demand, it is by two information recording layers, makes the recording capacity of DVD CD rise to 8.5GB from the 4.7GB of script individual layer DVD CD.
Figure 1A is data are read in display principle from double record layer (recording layer) CD, as shown in the figure, pit (Pit) and face, land (Land) of multiple different length composition is formed in the appropriate location of this transparency carrier, and coating one semi-reflective layer or a reflection horizon can form this first recording layer L1 and the second recording layer L2 on each layer pit and face, land, one is provided with in order to avoid the signal between this first recording layer L1 and the second recording layer L2 mutually to disturb and there is wall (space layer) L3 of suitable thickness between this first recording layer L1 and the second recording layer L2, its embodiment is photoplasticity resin (Transparent photosetting Resin, TR), and make this first recording layer L1 that some light can be allowed to reflect by the thickness in this reflection horizon of adjustment, this second recording layer L2 can allow all light reflections.When player plays this CD, can by the object lens in this optical read head of adjustment (Optical Heads) and the distance between video disc recording layer (the first recording layer L1 and the second recording layer L2), make the focus point of this laser beam (Laser Beam) (focusing point) focus on respectively on this first recording layer L1 and the second recording layer L2, so namely can read the record data on this first recording layer L1 and the second recording layer L2.
It should be noted that, data can carry out record with smallest record unit " physical blocks ", are distributed in each recording layer, and each physical blocks all has a numerical value indicates, and are called " physical block address ".When this recording medium have two-layer or two-layer more than recording layer time, the factor of two aspects must be considered: one when distributing this physical block address, each physical block address in whole recording medium must be unique (except the tracking Path Method of PTP (Parallel Track Path)), if when there is identical physical block address in this first recording layer and the second recording layer, then disk player cannot the information only needed for the judgement of its physical block address be recorded on this first recording layer L1 or the second recording layer L2.They are two years old, the physical block address being assigned to each recording layer to need to be transformed into easily on the first recording layer on any one address, it is because physical block address is a positional information, in order to make the optical read head of disk player can move on to quickly and accurately on required block, the accurate distance of required movement must be calculated by this physical block address.
The double-layer CD used on the market at present mostly adopts Opposite Track Path (Opposite TrackPath; OTP) tracking Path Method, as shown in Figure 1B, first the method reads data by optical read head from the inner ring Lead in Zone of Layer 0 recording layer, and along Data Zone read always this be positioned at the Middle Zone region of outer ring time, namely leap to Layer 1 recording layer, and from the Middle Zone region being positioned at outer ring, read data until move into place the Lead-out Zone region in inner ring.Due to optical read head after often having read all data of a recording layer without the need to adjusting to innermost circle, directly can read the data of next record layer, therefore, optical read head can be saved and search time of lower data, generally all carry out this method.
United States Patent (USP) No. 5881032 Patent Case " Optical Disk, And Optical DiskReproduction Method And Apparatus Implementing a MathematicalComplementary Relationship For Plural Layers " propose a kind of position encoded rule of recording medium, wherein this recording medium comprises multiple recording layer, reproduction direction (reproduction directions) contrary (as shown in Figure 2 A) of this odd-level and the spiral fashion rail ditch (spiral grooves) on even level, being assigned to the physical block address be positioned on same radius position on odd-level and even level is the numerical value of complementary relationship.
Again as shown in Figure 2 B, it is an address assignment schematic diagram comprising the recording medium of dual recording layer in above-mentioned patent, in figure, this is positioned at ground floor L1 physical block address (Physical Sector Address) X on the r of same radius position and second layer L2 physical block address X ' is complementary relationship.Such as, if this ground floor L1 physical block address be positioned in this radius r is 030000h, then the physical block address in this second layer on same radius position must be FCFFFFh (wherein, h represents sexadecimal counting method).As shown in the figure, this shadow region 1a and shadow region 1b is Lead-In Area (lead-in area) and mesozone (middle area) respectively, white space between this Lead-In Area 1a and mesozone 1b is user block of information, the physical block address of the inner radii of this ground floor user area is Xin, the physical block address of outer radii be then Xout (wherein, Xin < Xout), the physical block address of this ground floor L1 is sequentially increased progressively to outer ring by inner ring, and the physical block address of complement code as this corresponding second layer L2 of the ground floor L1 physical block address of same Radius (R) will be positioned at, thus, each physical block address of this second layer L2 is sequentially increased progressively to inner ring by outer ring, in addition, the final physical block address of this ground floor L1 and the initial physical block address of second layer L2 are numerically in discontinuous situation.
Again as shown in Figure 2 C, it is an address assignment schematic diagram comprising the recording medium of four recording layers, as shown in the figure, for making the physical block address of physical block address difference at this ground floor L1, second layer L2 of this third layer L3, the 4th layer of L4, a character (byte) need be increased in this physical block address, when the physical block address supposing this third layer L3 is 0130000h, according to this physical block address only after 3Bytes adopt the mode of principle of complementarity, the physical block address that can calculate on the 4th layer of L4 in same radius is 01CFFFFh.
The regular feature due to this address coding method of the geocoding that above-mentioned patent discloses is that approximate first recording layer of corresponding address and the physical block address of the second recording layer are complementary relationships on DVD CD radial direction, thus this address coding method is only applicable to the data structure of DVD-dual layer CD, cause the extendibility of this coding rule poor, not there is versatility, if when this address coding method being applied in the DVD CD of more than three layers, then must increase extra Byte record, this measure can reduce the storage area of DVD CD undoubtedly, if calculate with DVD ray Disc specifications, the storage area of its each recording layer recorded data will reduce about 2.4MBytes.In addition, be in the DVD CD of 12 centimeters at diameter, region between radius 24mm ~ 58mm is data recorded area, if carry out geocoding according to this geocoding rule, in the wide area that can record in 3Bytes, only use the configuration address that 030000h ~ 2930E9h and D6CF16h ~ FCFFFFh two pieces is minimum, middle more vast configurable address (2930E9h ~ D6CF16h) then can not be used completely, wastes too many configurable storage address (as shown in Figure 2 D), moreover, the access site of video-audio data in general CD, with logical blocks position arrangement in file system, therefore when CD-ROM drive on a dvd disc access data time, the switching motion of logical block addresses and physical block address must be carried out, according to general rule in the industry, the data recorded area of general DVD CD is for start address with physical block address 030000h, logical block addresses is then start address with 000000h, thus at CD-ROM drive when reading the data on physical block address, need to change in advance with logical block addresses, this patent is the reduction formula coordinating the coding rule of its complimentary fashion to disclose:
When PSA is positioned at ground floor, (LSA)=(PSA)-(Xin)
When PSA is positioned at the second layer, (LSA)=(PSA)+[2* (Xout)+2]-(Xin)
But the conversion rule of above-mentioned LSA and PSA, be only applicable to carry out the DVD-dual layer CD of complimentary fashion, therefore, this scaling method also cannot be applicable to the CD of more than three layers of this patent, because the 1Byte added inapplicable complimentary fashion.
From the above, how providing a kind of and be applicable to multiple recording layer and effectively utilize the data structure of configurable address, is current problem demanding prompt solution.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, fundamental purpose of the present invention is the read method providing a kind of multi-layer recording medium and multi-layer recording medium, is applicable to the recording medium of multiple recording layer.
Another object of the present invention is to the read method that a kind of multi-layer recording medium and multi-layer recording medium are provided, make full use of configurable storage address, add data storing space.
Another object of the present invention is the read method providing a kind of multi-layer recording medium and multi-layer recording medium data, provides an easy reduction formula between logical block addresses and physical block address, and is useful in the recording medium of multiple recording layer.
Another object of the present invention is the read method providing a kind of multi-layer recording medium and multi-layer recording medium, improves the reading speed of recording medium data, saves the reading time.
For reaching above-mentioned and other relevant object, the invention provides the read method of a kind of multi-layer recording medium and multi-layer recording medium, this multi-layer recording medium at least comprises: one first recording layer (Recording Layer), at least has a Lead-In Area (Guide-In Region), one and the final physical block address continuous print first user district (User Region) and one and the final physical block address continuous print first skip floor district (Jump Region) in this first user district of this Lead-In Area; And one storehouse at the second recording layer of this first recording layer, at least there is one second skip floor district, one and final physical block address continuous print second user area and one and the final physical block address continuous print leading-out zone (Guide-Out Region) of this second user area in this second skip floor district; The physical blocks of the Lead-In Area of this first recording layer and the second recording layer, the first skip floor district, the second skip floor district and leading-out zone is a fixed qty respectively, and the initial physical block address in the final physical block address in this first skip floor district and this second skip floor district is continuous print, the physical block address be namely connected between two recording layers is continuous print.In addition, this Lead-In Area records the physical blocks quantity of the initial physical block address (SURPSA) in this first user district, the initial physical block address (SGIPSA) of Lead-In Area, the final physical block address (EPSA) of this first user district and the second user area and the first skip floor district, the second skip floor district and leading-out zone.
The invention still further relates to a kind of multi-layer recording medium, this multi-layer recording medium comprises: one first recording layer, at least has a Lead-In Area, one and the final physical block address continuous print first user district and one and the final physical block address continuous print first skip floor district in this first user district of this Lead-In Area, at least one storehouse at the Intermediate recording layer of this first recording layer, at least have an outer skip floor district, one and this outer skip floor district final physical block address continuous print user area and one and this user area final physical block address continuous print in skip floor district, and one storehouse at the second recording layer of this Intermediate recording layer, at least there is one second skip floor district, one and final physical block address continuous print second user area and one and the final physical block address continuous print leading-out zone of this second user area in this second skip floor district, wherein, this first recording layer, the Lead-In Area of Intermediate recording layer and the second recording layer, first skip floor district, outer skip floor district, interior skip floor district, the physical blocks of the second skip floor district and leading-out zone is a fixed qty respectively, and the initial physical block address in the final physical block address in this first skip floor district and this outer skip floor district is continuous print, the final physical block address in this interior skip floor district and the initial physical block address in this second skip floor district are continuous print, namely be connected to each recording layer (the first recording layer, Intermediate recording layer and the second recording layer) between physical block address be continuous print.In addition, the final physical block address of the initial physical block address in this first user district, the initial physical block address of this Lead-In Area, this first user district, user area and the second user area is recorded in this Lead-In Area, and the first skip floor district, outer skip floor district, interior skip floor district, the second skip floor district and leading-out zone physical blocks quantity.
The read method of this multi-layer recording medium, be useful in and there is at least one first recording layer and a storehouse the second recording layer at this first recording layer, it is characterized in that, this first recording layer at least has a Lead-In Area, one with the final physical block address of this Lead-In Area continuously and deposit the first user district and one and the final physical block address continuous print first skip floor district in this first user district of user's data, this second recording layer at least has one second skip floor district, one with the final physical block address in this second skip floor district continuously and deposit second user area and one and the final physical block address continuous print leading-out zone of this second user area of user's data, wherein, the final physical block address in this first skip floor district and the initial physical blocks address in the second skip floor district are serial numbers, the method of this reading at least comprises: (1) records the initial physical block address in this Lead-In Area, the initial physical block address in this first user district, the final physical block address of this first user district and the second user area, and this first skip floor district, the physical blocks quantity of the second skip floor district and this leading-out zone is in this Lead-In Area, (2) optical read head reads the physical blocks quantity in the final physical block address in this first user district in this Lead-In Area, the final physical block address of the second user area and this first skip floor district, the second skip floor district in advance, (3) this optical read head is made to move to the initial physical block address in this first user district, and read data to the direction of the final physical block address in this first user district, read the physical block address at current place, and judge whether the final physical block address being positioned at this first user district, if, then enter step (4), if not, then repeat this step, and (4) this optical read head jumps to this second recording layer, read the current physical block address of this second recording layer, according to being greater than the summation of the final physical block address in this first user district and the physical blocks quantity in this first skip floor district to judge that this optical read head is positioned at this second recording layer, calculate the start physical address with this second user area of final physical block address continuous print in this second skip floor district in this second recording layer, these user's data of continuous reading, the physical block locations be simultaneously positioned in this prior is equal or when being greater than this second user area final physical block locations, terminate to read.
Prior art " physical block address between different layers configures in complementary fashion; location, old place is uncontinuity " shown in Fig. 2 B to Fig. 2 C, that is first physical block address that terminate of recording layer, and the initial physical block address of the second recording layer is discontinuous.
Compared with prior art, the read method of multi-layer recording medium of the present invention and multi-layer recording medium, be useful in the recording medium with several record layers, and make full use of configurable storage area, increase data storing space, also provide the conversion method between a kind of easy logical block addresses and physical block address, more can according to this record associated address information in the lead-in area, the storage location of the media data that analysis will be read, improve the reading speed of media data, save the reading time.
Accompanying drawing explanation
Figure 1A is the schematic diagram that the CD with two recording layers realizes information regeneration;
Figure 1B is the position coding method schematic diagram in the OTP tracking path that general double-layer CD adopts;
Fig. 2 A is the spiral groove schematic shapes of prior art two recording layers;
Fig. 2 B is the address distribution schematic diagram that prior art comprises the recording medium of two recording layers;
Fig. 2 C is the address assignment schematic diagram that prior art comprises the recording medium of four recording layers;
Fig. 2 D is the schematic diagram of each layer physical block address complementary relationship in prior art;
Fig. 3 A is embodiment 1 schematic diagram of recording medium data structure of the present invention;
Fig. 3 B is embodiment 2 schematic diagram of recording medium data structure of the present invention;
Fig. 4 is the operating process schematic diagram judging the optical read head current place number of plies according to physical block address;
Fig. 5 utilizes the computing method of this Fig. 4 to judge the operating process schematic diagram of optical read head the need of skip floor;
Fig. 6 A is schematic flow sheet physical block address being converted to logical block addresses; And
Fig. 6 B is schematic flow sheet logical block addresses being converted to physical block address.
Embodiment
Multi-layer recording medium of the present invention is the CD with at least two recording layers.General in the industry in the process manufacturing multiplayer optical disk, the film or substrate with each layer signal can be reprinted, storehouse or be fitted on substrate, in this making link, the factors such as the tolerance produced when the tolerance produced due to mounting board tool and assembling, cause the edge of each recording layer both sides in multiplayer optical disk cannot complete matching, namely, produce " site error ", when this makes the optical read head of CD-ROM drive need skip floor to read next layer data, area without data may be in and cause the phenomenon correctly cannot locked rail and cause working as machine.For avoiding the generation of above-mentioned abnormal conditions; currently available technology arranges a segment protect district respectively in the front and back end of the user area of each recording layer; and the relevant informations such as related physical block address and zone name are stored in this protected location; make optical read head after skip floor; corresponding physical block address can be read, to carry out tracking action immediately according to its address points locked.Technical characteristics of the present invention is the protected location of these recording layer both sides is one section of physical blocks (please be detailed later) with fixing fair amount.
In the present embodiment; this protected location is the difference according to its function; Lead-In Area (Guide-in Region), interior skip floor district (Inside Jump Region), outer skip floor district (OutsideJump Region) or leading-out zone (Guide-out Region) can be defined as respectively, play different effects.Wherein, this Lead-In Area is arranged on the first recording layer start address section in the CD of multiple recording layer, is generally positioned at the inner ring of this multiplayer optical disk, records multiple relevant information for CD-ROM drive interpretation; This leading-out zone (Guide-out Region) is arranged on the end section of most end recording layer in multiplayer optical disk, if the CD of this several record layers is even level, then this leading-out zone is positioned at the inner ring of CD, if the CD of this several record layers is odd-level, then this leading-out zone is positioned at the outer ring of CD; This interior skip floor district (InsideJump Region) is arranged on the inner ring (if the inner ring of last recording layer has leading-out zone, without skip floor district in this) of each recording layer except the first recording layer, and this outer skip floor district (Outside JumpRegion) is arranged on the outer ring (if when the outer ring of last recording layer has a leading-out zone without in addition skip floor district) of each recording layer.
As shown in Figure 3A, it is embodiment 1 schematic diagram of multi-layer recording medium of the present invention, and the direction of arrow represents order when reading data.As shown in the figure, this multi-layer recording medium comprises one first recording layer (Recording Layer) 31 and a storehouse the second recording layer 32 at this first recording layer 31.This first recording layer 31 has first user district, a Lead-In Area (Guide-In Region) 311, (User Region) 312 and one first skip floor district (Jump Region) 313, and physical block address (the Physical Sector Address in this Lead-In Area 311, first user district 312 and the first skip floor district 313; PSA) be continuous print; This second recording layer 32 has one second user area 322, skip floor district 321,1 second and a leading-out zone (Guide-OutRegion) 323, and the physical block address of this user area 322, the second skip floor district 321, second and leading-out zone 323 is continuous print.Wherein, the final physical block address in this first skip floor district 313 and the initial physical block address in this second skip floor district 321 increase progressively continuously or successively decrease continuously.The physical blocks (Physical Sector) of this skip floor district 321 of skip floor district 313, second, Lead-In Area 311, first and leading-out zone 323 is a fixing fair amount respectively, and each physical blocks of this skip floor district 321 of skip floor district 313, second, Lead-In Area 311, first and leading-out zone 323 correspondence can be equal number, also can be varying number.In the present embodiment, according to the specification of DVD disc definition, the error of each recording layer storehouse should be not more than 0.5mm, calculate with 0.74 μm, gauge, they approximately can across 676 tracks, if calculate to be positioned at DVD CD outer ring, be about the physical blocks of quantity 48000, therefore, the better embodiment of the fixed qty physical blocks in this first skip floor district 313 and the second skip floor district 321 can be set as the physical blocks of quantity 50000, but, this fixed qty physical blocks is only a better embodiment, not in the enforceable mode of this restricted number fixed qty of the present invention physical blocks.In addition, in this Lead-In Area 311, record the physical blocks quantity of the initial physical block address (SGIPSA) of this Lead-In Area 311, the initial physical block address (SURPSA) in this first user district 312, this first user district 312 final physical block address (EPSA1), the final physical block address (EPSA2) of the second user area 322 and the first skip floor district 321 of skip floor district 313, second, leading-out zone 323.
Refer to Fig. 3 B, it is embodiment 2 schematic diagram of multi-layer recording medium of the present invention, and the direction of arrow represents order when reading data.This multi-layer recording medium comprises one first recording layer 31, at least one storehouse at the Intermediate recording layer 33 of this first recording layer 31 and a storehouse the second recording layer 32 at this Intermediate recording layer 33.This first recording layer 31 has first user district, Lead-In Area 311, one 312 and an one first skip floor district 313, and the physical block address in this Lead-In Area 311, first user district 312 and the first skip floor district 313 is continuous print; This Intermediate recording layer 33 has skip floor district 333 in a user area, outer skip floor district 331, one 332 and, and the physical block address in this outer skip floor district 331, user area 332 and interior skip floor district 333 is continuous print; This second recording layer 32 has one second user area, skip floor district 321,1 second 322 and a leading-out zone 323, and the physical block address of this user area 322, the second skip floor district 321, second and leading-out zone 323 is continuous print.Wherein, the final physical block address (namely the final physical block address in this first skip floor district 313) of this first recording layer 31 and the initial physical block address (namely the initial physical block address in this outer skip floor district 331) of this Intermediate recording layer 33 increase progressively continuously or successively decrease continuously; The final physical block address (namely the final physical block address in this interior skip floor district 333) of this Intermediate recording layer 33 and the initial physical block address (namely the initial physical block address in this second skip floor district 321) of this second recording layer 32 are also increase progressively continuously or successively decrease continuously.The physical blocks of this skip floor district 313, Lead-In Area 311, first, outer skip floor district 331, skip floor district 321 of interior skip floor district 333, second and leading-out zone 323 is a fixing fair amount respectively, and each physical blocks of this skip floor district 313, Lead-In Area 311, first, outer skip floor district 331, skip floor district 321 of interior skip floor district 333, second and leading-out zone 323 correspondence can be equal number, also can be varying number.In addition, the initial physical block address of this Lead-In Area 311, the initial physical block address in this first user district 312 is recorded in this Lead-In Area 311, the final physical block address of this first user district 312, user area 332 and the second user area 322, the physical blocks quantity of this first skip floor district 313, outer skip floor district 331, skip floor district 321 of interior skip floor district 333, second and leading-out zone 323.
In the present embodiment, in this multi-layer recording medium, the reading of all data is reached by the optical read head (figure does not mark) of a CD-ROM drive.The read method of this multi-layer recording medium comprises:
(1) record the initial physical block address of this Lead-In Area 311, the initial physical block address in this first user district 312, the final physical block address of this first user district 312 and the second user area 322 and this first skip floor district 313, this second skip floor district 321, this leading-out zone 323 physical blocks quantity in this Lead-In Area 311;
(2) when CD-ROM drive will read this multi-layer recording medium, first this optical read head is locked in the scope of this Lead-In Area 311, reads the physical blocks quantity of the initial physical block address of the Lead-In Area 311 of record in this Lead-In Area 311, the initial physical block address in this first user district 312, the final physical block address of this first user district 312 and the second user area 322 and this first skip floor district 313, this second skip floor district 321, this leading-out zone 323.
(3) the initial physical block address in this first user district 312 read and the physical block address of optical read head current lock are contrasted, judge the moving direction of this optical read head, this optical read head is made to move to the initial physical block address in this first user district 312, and data are read by this initial physical block address to the direction of final physical block address in this first user district 312, also repeatedly contrast the physical block address of this optical read head current location and the final physical block address in the first user district 312 read by this Lead-In Area before simultaneously, until comparing result is equal or when being greater than, then enter step (4),
(4) when judging to show that the current read position of this optical read head is the final physical block locations being positioned at this first user district 312, perform skip floor order immediately to jump in this second recording layer 32, and understand the physical block address be now positioned at, then according to the final physical block address in this first user 312 district, calculate the start physical address of the second user area 322 of this second recording layer 32, the position of the physical blocks be currently located at that the start physical address of the second user area 322 this calculated again and this solution read contrasts, optical read head is made to move to the start physical address of this second user area 322, these user's data of continuous reading, repeatedly contrast this physical block locations be currently located at whether equal with the final physical block locations of this second user area 322 or be greater than simultaneously, and when judged result is equal or is greater than, namely the digital independent flow process terminating this time is represented.
Below coordinate Fig. 3 B to describe and judge the current present position of optical read head according to physical block locations, and judge the operating process of optical read head the need of skip floor and the conversion method flow process of logical block addresses and physical block address.For reaching the object of simplified illustration, in the present embodiment, Lead-In Area 311, the interior skip floor district 333 of this recording medium are equal with the physical blocks quantity in the second skip floor district 321, therefore its physical blocks quantity [(G1)=(the initial physical block address SURPSA in this first user district 312)-(rising of this Lead-In Area 311 makes physical block address SGIPSA)]; This first skip floor district 313, outer skip floor district 331 are equal with the physical blocks quantity of leading-out zone 323, and suppose it is all (G2) individual physical blocks quantity, G2 can equal or be not equal to G1.
As shown in Figure 4, it is the operating process schematic diagram judging optical read head current location according to physical block address.As shown in the figure, first step S410 is carried out, read the initial physical block address (hereinafter referred to as SGIPSA) of this Lead-In Area 311 in this Lead-In Area 311, the initial physical block address (hereinafter referred to as SURPSA) in this first user district 312, the final physical block address (hereinafter referred to as EPSA1) in this first user district 312, the final physical block address (hereinafter referred to as EPSA2) of this user area 332 and the physical blocks quantity (hereinafter referred to as G2) in this first skip floor district 313, and calculate the physical blocks quantity (hereinafter referred to as G1) of this Lead-In Area 311, wherein, (G1)=(SURPSA)-(SGIPSA), the physical blocks quantity obtaining interior skip floor district 333 is G1, then step S420 is carried out.
In this step S420, read current physical block address (hereinafter referred to as X), then carry out step S430.
In this step S430, judge whether X is greater than (G2)+(EPSA1), if not, then judge that this optical read head is positioned at the first recording layer 31 (as step S460), otherwise enter step S440.
In this step S440, judge whether X is greater than (G1)+(EPSA2), if not, then judge that this optical read head is positioned at Intermediate recording layer 33 (as step S470), otherwise enter step S450.
In this step S450, judge that this optical read head is positioned at the second recording layer 32.
As shown in Figure 5, the judgment rule of this Fig. 4 is utilized to judge the operating process schematic diagram of optical read head the need of skip floor, namely when user if desired reads certain segment data, a kind of judging whether of optical read head is provided to need skip floor to read rapidly the method for data, first step S510 is carried out, read current physical block address (hereinafter referred to as X), then carry out step S520.
In this step S520, identify the physical block address (hereinafter referred to as Y) of target, this Y is the physical block address that above-mentioned user will read certain segment data, then carries out step S530.
In this step S530, according to above-mentioned judgment rule (as shown in Figure 4), judge then to carry out step S540 by the recording layer (hereinafter referred to as L1) that X is positioned at.
In this step S540, according to above-mentioned judgment rule (as shown in Figure 4), judge then to carry out step S550 by the recording layer (hereinafter referred to as L2) that Y is positioned at.
In this step S550, judge whether L1 equals L2, if so, then enters step S560, if not, then enter step S570.
In this step S560, L1 equals L2, and represent that current address and identification address are arranged in same recording layer, this optical read head need not skip floor.
In this step S570, L1 is not equal to L2, makes this optical read head jump to recording layer L2, continues to read data.
As shown in Figure 6A, it is schematic flow sheet physical block address being converted to logical block addresses.Please coordinate shown in Fig. 3 B simultaneously, the physical blocks quantity in Lead-In Area 311, interior skip floor district 333 and the second skip floor district 321 is identical, the physical blocks quantity of first user district 312, user area, middle layer 332 is identical, and the physical blocks quantity in the first skip floor district 313, outer skip floor district 331 and the second skip floor district 323 is identical.First step S610 is carried out, read the initial physical block address (hereinafter referred to as SGIPSA) of the Lead-In Area 311 of this Lead-In Area 311, the initial physical block address (hereinafter referred to as SURPSA) in this first user district 312, the final physical block address (hereinafter referred to as EPSA1) in this first user district 312, and this first skip floor district 313, the physical blocks quantity (hereinafter referred to as G2) in outer skip floor district 331, and calculate this Lead-In Area 311, interior skip floor district 333, the physical blocks quantity (hereinafter referred to as G1) in the second skip floor district 321, the physical blocks quantity (hereinafter referred to as Y) of this first user district 312 and user area, middle layer 332, wherein, (G1)=(SURPSA)-(SGIPSA), (Y)=(EPSA1)-(SURPSA)+(1), then carries out step S620.
In this step S620, read physical block address (hereinafter referred to as X) to be converted in this recording medium, then carry out step S630.
In this step S630, calculate the difference (hereinafter referred to as W) of X and SURPSA, then enter step S640.
In this step S640, judge whether W is less than Y, if so, then enters step S651, show that this logical block addresses (hereinafter referred to as LSA) equals W, if not, then enter step S650.
In this step S650, arranging count value (hereinafter referred to as Count) is 0, then carries out step S660.
In this step S660, judge whether Count can be divided exactly by 2, if so, then carries out step S671, otherwise carry out step S672.
In this step S671, computing formula (W)=(W)-(Y)-(2) × (G2), then carries out step S680.
In this step S672, computing formula (W)=(W)-(Y)-(2) × (G1), then carries out step S680.
In this step S680, calculate (Count)=(Count)+(1), then carry out step S690.
In this step S690, judge whether W is less than Y, then proceeds step S660 if not, if so, then carry out step S691.
In this step S691, calculate LSA, its computing formula is (LSA)=(Count) × (Y)+(W).
Fig. 6 B is schematic flow sheet logical block addresses being converted to physical block address, first step S710 is carried out, read the initial physical block address in the Lead-In Area 311 (hereinafter referred to as SGIPSA) of this Lead-In Area 311, the initial physical block address (hereinafter referred to as SURPSA) in this first user district 312, the final physical block address (hereinafter referred to as EPSA1) in this first user district 312, and this first skip floor district 313, the physical blocks quantity (hereinafter referred to as G2) in outer skip floor district 331, and calculate this Lead-In Area 311, interior skip floor district 333, the physical blocks quantity (hereinafter referred to as G1) in the second skip floor district 321, the physical blocks quantity (hereinafter referred to as Y) of this first user district 312 and user area, middle layer 332, wherein, (G1)=(SURPSA)-(SGIPSA), (Y)=(EPSA1)-(SURPSA)+(1), then enters step S720.
In this step S720, read logical block addresses (hereinafter referred to as X) to be converted, then carry out step S730.
In this step S730, calculate the integer (hereinafter referred to as Q) of (X)/(Y) gained, and calculate the remainder (hereinafter referred to as R) of (X)/(Y) gained, then carry out step S740.
In this step S740, judge whether (Q) is (0), if then carry out S751, if not, then enters step S750.
In this step S751, calculate this physical block address (hereinafter referred to as PSA), its computing formula is (PSA)=(SURPSA)+(R).
In this step S750, parameters (hereinafter referred to as i)=(Q), count value (hereinafter referred to as Count)=(0) and parameter (hereinafter referred to as W)=(0), and carries out step S760.
In this step S760, judge whether Count can be divided exactly by 2, if so, enters step S771, if not, then enters step S772.
In this step S771, computing formula (W)=(W)+(Y)+(2) × (G2), then carries out step S780.
In this step S772, computing formula (W)=(W)+(Y)+(2) × (G1), then carries out step S780.
In this step S780, calculate (Count)=(Count)+(1), then carry out step S790.
In this step S790, calculate (i)=(i)-(1), then carry out step S800.
In this step S800, judge whether i equals 0, if so, carry out step S810, otherwise turn back to step S760.
In this step S810, calculate this physical block address (hereinafter referred to as PSA), its computing formula is (PSA)=(W)+(SURPSA)+(R).
The conversion method flow process of the physical block address shown in above-mentioned Fig. 6 A and 6B and logical block addresses is applicable to all multi-layer recording mediums (comprising the recording medium of bilayer and more than three layers).But for two-layer recording medium, because its structure is comparatively simple, skip floor district only only has the first skip floor district and the second skip floor district, therefore conversion method can be simplified.
Please refer to Fig. 3 A and Fig. 6 A, first the method that this physical block address is scaled logical block addresses reads the initial physical block address in the Lead-In Area 311 (hereinafter referred to as SGIPSA) of this Lead-In Area 311, the initial physical block address (hereinafter referred to as SURPSA) in this first user district 312, the final physical block address (hereinafter referred to as EPSA1) in this first user district 312, and this first skip floor district 313, the physical blocks quantity (hereinafter referred to as G2) in the second skip floor district 321, the physical blocks quantity (hereinafter referred to as Y) in this first user district 312, wherein, (Y)=(EPSA1)-(SURPSA)+(1), secondly, physical block address (hereinafter referred to as X) to be converted in this recording medium is read, again, the difference (hereinafter referred to as W) of X and SURPSA is calculated, finally, judge whether W is less than Y, if so, show that this logical block addresses (hereinafter referred to as LSA) equals W, if not, calculate (LSA)=(W)-(2) × (G2).
Please refer to Fig. 3 A and 6B, first the method that this logical block addresses is scaled physical block address is, read the initial physical block address in the Lead-In Area 311 (hereinafter referred to as SGIPSA) of this Lead-In Area 311, the initial physical block address (hereinafter referred to as SURPSA) in this first user district 312, the final physical block address (hereinafter referred to as EPSA1) in this first user district 312, and this first skip floor district 313, the physical blocks quantity (hereinafter referred to as G2) in the second skip floor district 321, the physical blocks quantity (hereinafter referred to as Y) in this first user district 312, wherein, (Y)=(EPSA1)-(SURPSA)+(1), secondly, a logical block addresses (hereinafter referred to as X) to be converted is read, again, calculate the integer (hereinafter referred to as Q) of (X)/(Y) gained, and the remainder (hereinafter referred to as R) of (X)/(Y) gained, finally, this physical block address (PSA)=(SURPSA)+(Q) × [(Y)+(2) × (G2)]+(R) is calculated.
In sum, the read method of multi-layer recording medium of the present invention and multi-layer recording medium can be applicable to all two-layer above CDs, the scope of application is wider, being used in the physical block address connecting adjacent recording layer is continuous print mutually, therefore, the present invention makes full use of configurable storage address, in addition, the invention provides the conversion method between a kind of easy logical block addresses and physical block address, convert in the address that this conversion method is useful in several record layers simultaneously, moreover, the present invention is the final physical block address recording user area in each recording layer in the lead-in area, CD-ROM drive is made directly to contrast with current physical block address, judge the recording layer that this optical read head is currently located at, the recording layer that the physical block address that will read is positioned at can be judged, quick judgement optical read head is the need of skip floor, improve the reading speed of recording medium data, save the reading time.
Claims (14)
1. the read method of a multi-layer recording medium, this multi-layer recording medium has at least one first recording layer and a storehouse the second recording layer at this first recording layer, it is characterized in that, this first recording layer at least have a Lead-In Area, one and this Lead-In Area final physical block address continuously and deposit the first user district and one and the final physical block address continuous print first skip floor district in this first user district of user's data; And this second recording layer at least have one second skip floor district, one and this second skip floor district final physical block address continuously and deposit second user area and one and the final physical block address continuous print leading-out zone of this second user area of user's data, wherein, the final physical block address in this first skip floor district and the initial physical blocks address in the second skip floor district are serial numbers, and this read method at least comprises:
(1) the physical blocks quantity of the final physical block address of the initial physical block address in the initial physical block address of Lead-In Area, this first user district, this first user district and the second user area and this first skip floor district, the second skip floor district and this leading-out zone is recorded in this Lead-In Area;
(2) optical read head reads the physical blocks quantity in the final physical block address in this first user district in this Lead-In Area, the final physical block address of the second user area and this first skip floor district, the second skip floor district in advance;
(3) this optical read head is made to move to the initial physical block address in this first user district, and read data to the direction of the final physical block address in this first user district, read the physical block address at current place, and judge whether the final physical block address being positioned at this first user district, if, then enter step (4), if not, then repeat this step; And
(4) this optical read head jumps to this second recording layer, read the current physical block address of this second recording layer, according to being greater than the summation of the final physical block address in this first user district and the physical blocks quantity in this first skip floor district to judge that this optical read head is positioned at this second recording layer, calculate the start physical address with this second user area of final physical block address continuous print in this second skip floor district in this second recording layer, these user's data of continuous reading, the physical block locations be simultaneously positioned in this prior is equal or when being greater than the final physical block locations of this second user area, terminate to read.
2. the read method of multi-layer recording medium as claimed in claim 1, it is characterized in that, the physical block address of this first recording layer and the second recording layer increases progressively continuously.
3. the read method of multi-layer recording medium as claimed in claim 1, it is characterized in that, the physical block address of this first recording layer and the second recording layer successively decreases continuously.
4. the read method of multi-layer recording medium as claimed in claim 1, it is characterized in that, the second skip floor district of the Lead-In Area of this first recording layer and the first skip floor district and the second recording layer and the physical blocks of leading-out zone are a fixed qty respectively.
5. the read method of multi-layer recording medium as claimed in claim 4, is characterized in that, the physical blocks of this Lead-In Area, the first skip floor district, the second skip floor district and leading-out zone is equal number.
6. the read method of multi-layer recording medium as claimed in claim 4, is characterized in that, the physical blocks of this Lead-In Area, the first skip floor district, the second skip floor district and leading-out zone is varying number.
7. the read method of multi-layer recording medium as claimed in claim 1, is characterized in that, calculates to comprise physical block address and be scaled the computing method that the computing method of logical block addresses and logical block addresses are scaled physical block address.
8. the read method of multi-layer recording medium as claimed in claim 7, it is characterized in that, the computing method that this physical block address is scaled logical block addresses at least comprise:
A () is read initial physical block address SGIPSA, the initial physical block address SURPSA in this first user district, the final physical block address EPSA1 in this first user district of this Lead-In Area in this Lead-In Area and is supposed that identical is all the first skip floor district of G2, the physical blocks quantity in the second skip floor district, and calculate the physical blocks quantity Y in this first user district;
B () reads physical block address X to be converted in this recording medium;
C () calculates the difference W of the initial physical block address SURPSA in this physical block address X and this first user district;
D () judges whether W is less than Y, if so, show that this logical block addresses LSA equals W, if not, then enter step (e); And
E () calculates this logical block addresses LSA, its computing formula is LSA=W-2 × (G2).
9. the read method of multi-layer recording medium as claimed in claim 7, it is characterized in that, the computing method that this logical block addresses is scaled physical block address at least comprise:
A () is read initial physical block address SGIPSA, the initial physical block address SURPSA in this first user district, the final physical block address EPSA1 in this first user district of this Lead-In Area in this Lead-In Area and is supposed that identical is all the first skip floor district of G2, the physical blocks quantity in the second skip floor district, and calculate the physical blocks quantity G1 of this Lead-In Area and the physical blocks quantity Y in this first user district;
B () to read in this recording medium a logical block addresses X to be converted;
C () calculates the integer Q of X/Y gained, and the remainder R of X/Y gained; And
D () calculates this physical block address PSA, computing formula is PSA=SURPSA+Q × [Y+2 × (G2)]+R.
10. the read method of multi-layer recording medium as claimed in claim 7, it is characterized in that, this physical block address is scaled the computing method at least Bao Kuo ︰ of logical block addresses
A () reads the physical blocks quantity G2 in initial physical block address SGIPSA, the initial physical block address SURPSA in this first user district of this Lead-In Area in this Lead-In Area, the final physical block address EPSA1 in this first user district and this first skip floor district, and calculate the physical blocks quantity G1 of this Lead-In Area and the physical blocks quantity Y in this first user district;
B () reads physical block address X to be converted in this recording medium;
C () calculates the difference W of the initial physical block address SURPSA in this physical block address X and this first user district;
D () judges whether W is less than Y, if so, namely show that this logical block addresses LSA equals W, if not, then enter step (e);
E () parameters i equals the record number of plies of this recording medium data structure, and the initial value arranging count value Count is 0;
F () judges whether this count value Count can be divided exactly by 2, if so, then calculate W according to computing formula W=W-Y-2 × (G2), if not, then calculates W according to computing formula W=W-Y-2 × (G1);
G () calculates Count=Count+1, and enter step (h);
H () judges whether W is less than Y, if not, then enter step (f), if so, then enter step (i); And
I () calculates this logical block addresses LSA, its computing formula is LSA=Count × Y+W.
The read method of 11. multi-layer recording mediums as claimed in claim 7, it is characterized in that, the computing method that this logical block addresses is scaled physical block address at least comprise:
A () reads the physical blocks quantity G2 in initial physical block address SGIPSA, the initial physical block address SURPSA in this first user district of this Lead-In Area in this Lead-In Area, the final physical block address EPSA1 in this first user district and this first skip floor district, and calculate the physical blocks quantity G1 of this Lead-In Area and the physical blocks quantity Y in this first user district;
B () to read in this recording medium a logical block addresses X to be converted;
C () calculates the integer Q of X/Y gained, and the remainder R of X/Y gained;
D () parameters i equals Q, parameter W equals 0, and the initial value of count value Count is 0;
E () judges whether this count value Count can be divided exactly by 2, if so, then calculate W according to computing formula W=W+Y+2 × (G2), if not, then calculates W according to computing formula W=W+Y+2 × (G1);
F () calculates Count=Count+1 and i=i-1;
G () judges whether i equals 0, if not, then turn back to step (e), if so, then enter step (h); And
H () calculates this physical block address PSA, its computing formula is PSA=W+SURPSA+R.
The read method of 12. multi-layer recording mediums as described in claim 10 or 11, it is characterized in that, the computing formula of the physical blocks quantity G1 of this Lead-In Area is G1=SURPSA-SGIPSA.
The read method of 13. multi-layer recording mediums as described in claim 10 or 11, it is characterized in that, the computing formula of the physical blocks quantity Y in this first user district is Y=EPSA1-SURPSA+1.
The read method of 14. multi-layer recording mediums as claimed in claim 1, is characterized in that, this recording medium is two-layer above CD.
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| CN200510125656.7A CN1979646B (en) | 2005-11-30 | 2005-11-30 | Method for reading multilayer recording medium data |
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| CN200510125656.7A CN1979646B (en) | 2005-11-30 | 2005-11-30 | Method for reading multilayer recording medium data |
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| CN1979646B true CN1979646B (en) | 2014-12-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247622A (en) * | 1995-10-19 | 2000-03-15 | 松下电器产业株式会社 | Information recording media, information reproduction method and information reproduction equipment |
| CN1380645A (en) * | 2001-04-07 | 2002-11-20 | 三星电子株式会社 | Optical disk and method for marking recording layer |
| CN1606075A (en) * | 2003-06-30 | 2005-04-13 | 索尼株式会社 | Recording medium, recording and reproduction apparatus, and recording and reproduction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247622A (en) * | 1995-10-19 | 2000-03-15 | 松下电器产业株式会社 | Information recording media, information reproduction method and information reproduction equipment |
| CN1380645A (en) * | 2001-04-07 | 2002-11-20 | 三星电子株式会社 | Optical disk and method for marking recording layer |
| CN1606075A (en) * | 2003-06-30 | 2005-04-13 | 索尼株式会社 | Recording medium, recording and reproduction apparatus, and recording and reproduction method |
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