CN101911196B - Circuits, architectures, apparatuses, systems, algorithms and methods and software for timing calibration for optical disc recording - Google Patents
Circuits, architectures, apparatuses, systems, algorithms and methods and software for timing calibration for optical disc recording Download PDFInfo
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10305—Improvement or modification of read or write signals signal quality assessment
- G11B20/10398—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors
- G11B20/10425—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors by counting out-of-lock events of a PLL
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/1075—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data
- G11B2020/10759—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data content data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
Abstract
The present disclosure relates to methods, software, and apparatuses for correcting reading and/or writing operations in an optical storage medium. The methods generally include reading a region of an optical storage medium to produce a readback signal, measuring timing offsets for a plurality of the data edges (including one or more non-guide edges), and storing an offset correction for at least one of the plurality of edges based on a measured offset of at least one of the plurality of edges relative to a predetermined offset. The disclosure advantageously enables precise measurement of timing offsets in optical storage media and correction of the measured offsets for timing offsets attributable to edge jitter, timing loop drift, or factors independent of variations in the medium and/or write operation characteristics.
Description
related application
The application requires the U.S. Provisional Patent Application No.61/020 submitting to respectively on January 14th, 2008 and on February 12nd, 2008,887 (the file number MP2393PR of agency) and No.61/027, the right of priority of 992 (the file number MP0960I1PR of agency), the content of these applications is incorporated into this by integral body by reference.
Technical field
The present invention relates generally to the technical field that optical storage media is write.More specifically, embodiments of the invention relate to for calibrating method and the device of the timing off-set that optical storage media is write.
Background technology
Optical storage technology comprises widely and more and more diversified dish and using standard.For example, dish standard comprises for the CD-ROM of prerecorded dish and DVD-ROM, CD-R, DVD-R, DVD+R for write-once discs, can record Blu-ray Disc (BD-R) etc., and for CD-RW, the DVD-RW of rewritable dish, DVD-RAM, DVD+RW, BD-RE etc.Dish format specification General Definition the physical characteristics (for example, mechanical property, characteristic, physical layout, wiring method and test condition) of dish.Using standard comprises video DVD (DVD-Video) for video content, for the audio frequency DVD (DVD-Audio) of audio content and for DVD-VR and the DVD+VR (for example,, for video camera and personal video record (PVR)) of real-time video recording.
In many CD standards, CD can comprise two regions, comprises user data area and dish information (introducing, lead-in) district.User data area is generally used for writing application data, and this application data comprises video, audio frequency, information table, file system data etc.Dish information (introducing) district generally comprises as coiled size, disc-type, dish layout etc. data.For example, in some CD standards (, CD-R, DVD-R, DVD+R, BD-R etc.), dish only can be written into once conventionally.For example, in other dish standard or form (, CD-R/W, DVD+RW, BD-RE etc.), data can be written in dish more than once.
Optical storage media conventionally using data as " pit " (pit) (or " mark ") and bank face (land) (or " interval ") sequence and be stored on Deta bearer surface, by applied metal layer, this Deta bearer surface is reflected during manufacture." bank face " is generally the part of the non-pit of track (track).Pit in read-only storage medium is generally overmolded in Deta bearer surface when formation dish.Recordable type and rewritable dish are generally made into blank, and only comprise that preformed groove (groove) or " pre-groove " (pre-groove) (in most cases, also comprise limited amount compacting data) during molded.
Data are used identical pit-bank face principle to be stored on recordable type or rewritable optical storage media, yet pit is generally by firing and be added being applied to special phase-change material layers on disc board.In order to write recordable type or rewritable dish, the optical pickup of CD reads laser instrument except being equipped with, and is generally also equipped with the laser instrument that writes of higher-wattage.Alternatively, a laser instrument generally can, by operating and operate with higher-wattage output area for write operation with lower-wattage output for read operation, be carried out two kinds of functions.
The quantity of power that is used for firing pit feature (pit feature) is vital to the shape of these features.The geometric influence of these pit features the performance of reading back of the system of reading back.Ge Jia manufacturer utilizes different materials to produce recordable type optical storage media and rewritable optical storage media.Therefore, may be too high or too low for another medium for a kind of suitable Writing power level of medium, even this two media be produced according to identical standard be also like this.Therefore, most optical storage media standards comprise that certain is for allowing manufacturer specify the mechanism of optimum level.Yet, even the specified power level of manufacturer all may due to the common process in medium and/or recording unit change or recording unit in operation change rather than best.Therefore, most optical storage media standards have also defined one or more areas of dielectric, for by determining optimum write power level with various power level data writings and these data of reading back, thereby carry out optimum power calibration (OPC).If data be with a plurality of sessions (session) mode be written into medium and/or be to utilize a plurality of different recording units to be written on same medium, to operate available amount of space may be limited to OPC and OPC operation may need repeatedly to move.Therefore, wish that optical storage media recording unit obtains the most accurate calibration data as far as possible.
As mentioned above, data generally by producing mark and interval is written into optical storage media on dish.There is " running length (run-length) " (for example data " 11100011 " comprise a 3T mark, a 3T interval and a 2T mark) at each mark and/or interval.Many traditional optical storage forms are encoded to the data that write in dish according to running length limited code (run-length limited code), so that there are a minimum and/or maximum running length in each mark and interval.It is corresponding that some write errors (comprising timing off-set error and changes in amplitude) and specific run length change (transition) (for example, transformation from 3T mark to 2T interval, be converted to transformation of 3T mark etc. from 6T interval).
In exemplary OPC system, described in US patent application publication No.2007-0201331 (its relevant portion is incorporated herein by reference), according to predetermined pattern (pattern) predetermined various power levels, timing off-set and/or other the adjustable write diagnostics of use, data are write in optical memory disc (or other optical storage media).For example, selecting type sample changes to comprise various running lengths.Therefore this system can be by being associated read back characteristic and predetermined pattern data and the known write diagnostics of the data that read from dish to determine the best write diagnostics of every kind of transformation type.
In addition, traditional method and apparatus that reads optical storage media is carried out timing recovery (timing recovery) to read operation is synchronizeed with the data of reading back from medium.For example, can utilize timing recovery to determine in readback signal which or/or which a plurality of samplings are corresponding with the data that are stored on medium.When traditional timing recovery is made incorrect judgement, readback signal may be explained mistakenly.At OPC during read operations, correctly synchronize and be even more important with readback signal, so that calibration measurement is accurate.Therefore, also wish (for example reading the data that write under various conditions, utilize some different Writing power levels, timing off-set etc. to write the calibration style data of optical storage media) time, effective correction to readback signal (for example, reducing the shake of time and/or amplitude) is provided.
In relevant exemplary OPC system, as the U.S. Patent application No.12/352 proposing on January 13rd, 2009, described in 950 (its relevant portion is incorporated herein by reference), in order to recover the sequential of readback signal, timing recovery loop (loop) has utilized the relative stability of predetermined read back style and low frequency transformation (for example, the transformation between the long run length such as 6T/6T changes).Therefore, tentation data can comprise " the guiding edge (guide edge) " with long run length.When OPC system detects the timing off-set at one of these guiding edges, this skew can be used for adjusting the sequential of reading back.For example, timing off-set or derivatives thereof can be provided to be used as the error that is input to traditional phase-locked loop (PLL).
PLL can not react to offset error conventionally immediately.As a result, other human factor in PLL drift and/or timing recovery process will affect guiding edge and both timing off-sets of non-guiding edge (non-guide edge).But, the timing off-set that the write diagnostics that may wish accurately to measure the variation in optical storage media and/or use causes.Therefore, wish to reduce because of time drift in sequence loop or with medium in variation and/or any timing off-set of causing of the irrelevant other factors of write diagnostics.
Summary of the invention
Embodiments of the invention relate to for proofreading and correct and utilize reading and/or method, software and the device of write operation of optical storage media.The method generally comprises following steps: read the region of optical storage media to produce readback signal; Measure a plurality of data edges timing off-set of (comprising one or more non-guidings edge); And the measured skew at least one edge based in a plurality of edges is stored the offset correction at least one edge at a plurality of edges with respect to predetermined migration.
In an exemplary embodiment, can, by based on extract linearly the offset calibration value at non-guiding edge from the bit distance at one or more guidings edge, calculate offset correction.Also can be based at front guiding edge (preceding guide edge) and the measured timing off-set of (succeeding guide edge) calculates this offset correction at rear guiding edge.Therefore bit distance that, can be based on from front guiding edge and carry out linear extraction offset correction from the bit distance at rear guiding edge.Alternatively, also can the measured skew based at least the first and second non-guiding edges come from non-guiding edge calculations offset correction.
Device can comprise: read module, and it is configured to read the region of optical storage media; Measurement module, it is configured to measure timing off-set; And logic, it is configured to calculate the offset correction at least one of a plurality of edges.The region of reading optical storage media has produced readback signal, and this readback signal comprises a plurality of edges, and these edges comprise one or more non-guidings edge.Measure the timing off-set of at least the first non-guiding edge and at least the second edge (this second edge may be the second non-guiding edge or the first guiding edge).It is at least one the measured skew based in the first and second edges that this (one or more) sequential is proofreaied and correct.
In an exemplary embodiment, the calibration region of CD is written into predetermined pattern data.Therefore, can process known style data and (for example read back channel (readback channel) to determine when to measure, during desired transition edge or left and right) and when produce and measure instruction (for example, indication metering circuit or other assembly are at the predetermined moment measurement channel that reads back).For example, can process these style data with guiding edge, location and produce the guiding edge metering instruction for desired transformation.The method can also comprise: in response to measuring instruction, measure timing off-set and/or calculate calibrated skew in response to measuring instruction.
The data that read from optical storage media generally include predetermined pattern data.Usually, style data were known before reading from medium, were so doped the anticipated shape of readback signal.Therefore, the method is written to style data in the region of CD before can being included in and reading style data.
In a further embodiment, the method comprises according to calibration command style data is written in the region of optical storage media.Calibration command is synchronizeed with style data conventionally.Therefore, the method can comprise reception bit stream (bitstream), and this bit stream comprises calibration command and style data.For example, this bit stream can have the calibration command being superimposed upon in style data.
The embodiment of the method can also comprise: the edge timing off-set of measuring readback signal according to calibration command (for example, by processing instruction and style data, produce and measure instruction), and calculate and write skew (for example, optimum level, timing off-set etc.) for what data are write to optical storage media through calibrated offset based on one or more.For example, the method can comprise: based on style data, one or more measurement results and one or more desired value are made comparisons.In a further embodiment, the method can comprise one or more measurement results are associated with one or more calibration command (for example, result being associated with the power level of being set by instruction in during writing or other characteristic).Alternatively, the method can comprise one or more measurement results are associated with the one or more running lengths in style data.
In another embodiment, process these style data and can comprise that these style data of analysis are to find out useful measuring position.For example, can analyze these style data to find out specific running length, the combination of mark/interval etc.Therefore, the method can comprise that generation guiding edge instruction is with the transformation corresponding in the combination of mark/interval.In one exemplary embodiment, guiding edge instruction can be corresponding to the 6T mark in style data and the transformation (vice versa) between 6T interval.
Guiding edge instruction can change and synchronize (for example, wherein, readback signal comprises style data) with the expection in readback signal.One or more characteristics of measuring readback signal can comprise the timing off-set (for example, wherein, readback signal should have transformation, as determined by style data) between the transformation of measuring in guiding edge instruction and readback signal.
In an exemplary embodiment, the method comprises according to the timing off-set at guiding edge, adjusts the output (for example, accelerate or this PLL that slows down to reduce the shake in readback signal) of phase-locked loop (PLL).For example, the method can comprise the adjustment of storing a plurality of timing off-set measured values and calculating PLL according to stored timing off-set measured value according to guiding edge instruction.
Algorithm, (one or more) computer program and/or the software that can in the system that is equipped with general purpose microprocessor and/or conventional digital signal processor, realize and/or carry out can be configured to carry out one or more steps of method described herein and/or one or more operations of hardware.Generally speaking, circuit, unit, framework and/or system comprise those circuit, unit, framework and/or the system of the one or more assemblies that contain imbody one or more inventive concepts disclosed herein.
The present invention has advantageously provided following ability: accurately measure the variation in optical storage media and/or timing off-set that the write diagnostics that uses causes, and for may by time drift in sequence loop or may with medium in variation and/or the timing off-set that causes of the irrelevant other factors of write diagnostics, proofread and correct measured skew.
Accompanying drawing explanation
Fig. 1 is according to the process flow diagram of the illustrative methods of the embodiment of the present invention.
Fig. 2 is the diagram that example waveform is shown.
Fig. 3 is the diagram illustrating according to the exemplary apparatus of inventive embodiments.
Fig. 4 is the diagram illustrating according to the exemplary apparatus for the treatment of calibration bit stream of the embodiment of the present invention.
Fig. 5 is the diagram of exemplary light memory storage.
Embodiment
With detailed reference to various embodiments of the invention, example of the present invention is shown in the drawings now.Although describe the present invention in connection with following embodiment, these embodiment are not intended to limit the present invention.On the contrary, the present invention is intended to contain substituting of may comprising in the scope of the present invention limiting as claims, modification and equivalent.In addition,, in following detailed description of the present invention, set forth many details and well understood of the present invention to provide.Yet, there is no these details, the present invention also can implement.In other cases, for fear of unnecessarily allowing, the each side of this explanation is ambiguous, and well known method, process, assembly and circuit are not described in detail.
The some parts of detailed description is below to represent to present according to process, process, logical block, functional block, processing and other symbol that the data bit in computing machine, processor, controller and/or storer, data stream or waveform are operated.These descriptions and represent that conventionally technician by data processing field is used for the essence of effectively passing on them to work to others skilled in the art.What processing, process, logical block, function, operation etc. were considered to produce the step of desirable and/or desired result or instruction conventionally at this is in harmony sequence certainly.These steps generally comprise the physical manipulation to physical quantity.Conventionally but and optionally, these physical quantitys by taking to be stored in computing machine, data handling system or logical circuit, transmit, combine, relatively and the form of electric signal, magnetic signal, light signal or the quantum signal otherwise handled.Mainly for public object, verified with bit, ripple, waveform, stream, value, unit, symbol, character, item, number etc., to refer to these signals be easily sometimes.
All these and similar terms are to be associated with suitable physical quantity, and are only the marks that facilitates that is applied to this tittle.Unless otherwise special instruction and/or can be clear from discussion below, otherwise will be appreciated that in whole the application, the discussion that the terms such as utilization such as " processing ", " operation ", " computing ", " calculating ", " determining ", " manipulation ", " conversion ", " demonstration " carry out refers to that computing machine, data handling system, logical circuit or similar treatment facility are (for example, electricity, light or quantum calculation or treatment facility) action and processing, these actions and process and for example, handle and convert being expressed as the data of physics (electronics) amount.These terms refer to following action, operation and/or the processing for the treatment of facility: these actions, operation and/or processing are to (one or more) parts of system or framework (for example, register, storer, other such information storage, transmission or display devices etc.) in physical quantity handle, or these physical quantitys are transformed to other data of the physical quantity in other parts that are expressed as similarly identical or different system or framework.
In addition, for convenient and simplification, term " clock ", " time ", " speed ", " period " and " frequency " are here generally used interchangeably, but conventionally give their implications being identified in field.And, for convenient and simplification, term " bit stream ", " data ", " data stream ", " waveform " and " information " are used interchangeably, equally, term " is connected to ", " with ... coupling ", " being coupled to " and " with ... communication " can use interchangeably (these terms can also refer between connected element, the element being coupled and/or communication device directly and/or indirect relation, unless other meaning clearly indicated in the use context of term), but these terms are also endowed their identified implications in field conventionally.
Finally, term " mark ", " interval ", " pit " and " bank face " generally refer to and write (and/or not writing) to the feature on recordable type optical storage media, and can represent binary numeral and/or be coded in other data on medium.The semantic values of " mark and interval " and/or " bank face and pit " can be depending on the form of optical storage media and change, but these terms are endowed their identified implications in field conventionally.
To illustrate in greater detail various aspects of the present invention for exemplary embodiment below.
illustrative methods for timing alignment
Fig. 1 shows the illustrative methods 100 for best power (selectively, sequential) calibration (OPC).The method 100 generally includes: for reading the region of optical storage media 101 with the step 120 of generation readback signal; Step 110-112, for the treatment of predetermined pattern data to produce one or more measurement instructions; Step 121-123, for processing readback signal measurement guiding edge and non-guiding edge timing off-set to produce one or more measurement results in response to measuring instruction.In each embodiment, optical storage media 101 for example can comprise CD, and this CD is for example Write-once optical disc (for example CD-R, DVD-R or DVD+R, BD-R etc.) or rewritable CD (for example DVD-RW, DVD+RW, DVD-RAM, BD-RE etc.).
In one exemplary embodiment, may be by Fig. 3 for utilizing various write diagnostics style data to be written to the method 300 of optical storage media, style data are write to medium 101.Style source 102 for example (for example can comprise storer, the storer of the style data that will be written into optical storage media is also provided), processing, circuit or for example, for produce other device, impact damper (, storage is written into the impact damper of the style data of optical storage media 101) of style data etc. according to algorithm.
In step 111, analyze style data to find out useful measuring position in readback signal.For example, can analyze style data to find out specific run length, the combination of mark/interval etc.During optimum power calibration (OPC) operation (it can also comprise timing alignment operation alternatively), in order to select best write diagnostics, obtain the accurate measurement of readback signal is even more important.
Traditional method and apparatus that reads optical storage media is carried out timing recovery so that read operation is synchronizeed with the data of reading back from medium.Yet sequence loop becomes more difficult when traditional OPC writes processing and may make suitably to adjust, this is because for example, for the write diagnostics (, power, timing off-set etc.) of data writing may be in a substantial change.Therefore, wish to make shake or other vary stable of sequential phase deviation, envelope (envelope) skew and/or the envelope gain of readback signal.
Mark and/or interval compared with long run length likely shorter running length change little.As a result, for example, compared with the transformation between long run length (, the transformation between 6T mark and 6T interval, vice versa) may be than the transformation to shorter running length or more stable from the transformation of shorter running length, and can be used as guiding edge.Therefore, step 111 can comprise: analyze style data to find out such transformation.Except finding out the transformation between the long run length at mark and/or interval, step 111 also can comprise other the non-guiding edge transition in the style data of location.
In step 112, according to the analysis of step 111, produce measurement instruction.Measure instruction and can comprise signal, operation code (operational code) or other message for for example, one or more characteristics in special time (, the time when one or more features of expectation readback signal and style data are corresponding) measurement readback signal.For example, measure instruction and can comprise that changing the timing off-set of synchronizeing with expection in readback signal measures instruction.Timing off-set instruction can comprise synchronize with the stabilised edge in style data for adjusting guiding edge metering instruction and/or other timing off-set instruction (for example,, for calibrating write diagnostics) of sequence loop while reading back.Measure that instruction also can comprise that envelope is measured instruction (for example,, in order to measure the amplitude of envelope or the instruction of other characteristic of readback signal) and/or in order to measure the instruction of other characteristic of readback signal.
Fig. 2 shows exemplary desirable readback signal waveform 201, and this waveform 201 is corresponding to style data 210.Waveform 202 is to have the exemplary readback signal that sequential, envelope migration and envelope gain change.In the example shown in Fig. 2, mark 212 and 218 and interval 211,213,217 and 219 there is separately the running length of 6T, and mark 214 and 216 and interval 215 there is separately the running length of 3T.
Sequence loop in order to adjust, guiding edge measuring-signal 220 is conventionally corresponding to for measuring the instruction of the timing off-set of readback signal.Therefore, guiding edge 221 is corresponding to the transformation between 6T interval 211 and 6T mark 212, guiding edge 222 is corresponding to the transformation between 6T mark 212 and 6T interval 213, guiding edge 223 is corresponding to the transformation between 6T interval 217 and 6T mark 218, and guiding edge 224 is corresponding to the transformation between 6T mark 218 and 6T interval 219.Envelope measuring-signal 230 is conventionally corresponding to for measuring the instruction of the envelope of readback signal.
Again consult Fig. 1, in step 121, according to measuring instruction, process readback signal.Therefore, step 122 can comprise any other characteristic of measuring the timing off-set at non-guiding edge transition place in readback signal, the amplitude of measuring readback signal and/or measurement readback signal.Step 123 can be included in the timing off-set (for example, while, reading back to adjust with the edge 221,222,223 synchronizeing with the metastable transformation in style data and 224 places measurement readback signal sequence loop) of each edge's measurement readback signal of guiding margin signal 220.The timing off-set of measuring in readback signal for example can comprise: at the time place corresponding with guiding edge metering instruction, measure the amplitude of readback signal, and calculate timing off-set according to measured amplitude.In step 125, can adjust according to guiding edge metering the output (for example, PLL accelerated or slow down to reduce the shake in readback signal) of phase-locked loop (PLL).
When measuring timing off-set, OPC operation can be caught distribution and the mean value at each edge.The distribution at each edge may be that the variation causing by the timing recovery shake causing because of PLL vibration, because of the power difference of during writing and/or the edge shake causing because of real marking edge shake cause.Wish to understand the edge shake causing because of real marking edge shake.By by this impact and other impact isolation, can revise the systematic parameter of during writing to optimize edge shake.This optimization for phase change medium is particular importance.
When guiding edge shake is mainly because PLL vibration is when causing, can be by extrapolation (extrapolate) timing off-set between guiding edge, from the timing off-set at the non-guiding edge that measures, deduct the impact that PLL trembles.Then, the distribution obtaining can be used to understand and/or calibration edge shake (for example, frequency of utilization histogram).
Therefore, in step 124, can by based on record at least one near guide edge (calibrated) offset storage at non-guiding edge of skew to storer.In step 130, can analyze skew and/or other measured value in step 124 storage.For example, can by based on from guiding edge (for example, immediate front or after guiding edge) the linear offset correction values of extracting non-guiding edge of bit distance, calculate or determine calibrated skew.Alternatively, calculating calibrated skew can comprise: the preceding guiding edge based on recording and after the timing off-set at guiding edge calculate the off-set value at (for example,, by linear extrapolation) non-guiding edge.
In other example, step 130 can comprise: store one or more in a plurality of timing off-set measured values and analysis to measure value and write processing to determine that best write diagnostics is calibrated, as the U.S. Patent application No.11/646 filing an application on Dec 26th, 2006, in 098 (the file number MP0960 of agency) in greater detail.Therefore, the method can comprise that optional step 130 writes calibration data (for example, optkmal characteristics and/or after a while will be used for determine the data of optkmal characteristics) with storage.
Therefore, method 100 provides during reading back style from optical storage media, by the known synchronization counterpart that writes style, is used as benchmark.The method can pre-determine: sampling represents the combination of specific mark/interval, and can be used for guiding timing recovery loop.When selecting stable edge as this guiding edge, can obtain highly stable benchmark, sequence loop when it is used to lock.The expection edge that can be identified for measuring (for example,, for writing calibration) with the non-guiding marginal position drawing from style data wherein.For the impact of more accurate measurement markers edge shake, can the guiding edge offset based on recording proofread and correct the timing off-set at the non-guiding edge that the impact because of the drift of timing recovery loop causes.
Sequential phase error can depend on change before and running length value afterwards and changing.For example, the 3T target sequential phase error that is followed by 6T interval may be different from the sequential phase error at the 5T interval that is followed by 4T mark.Therefore, wish to determine every kind of best sequential phase deviation that changes type, wherein, exist for every kind of transformation type that changes combination between a kind of mark (vice versa) of running length at interval that is followed by another running length.For example, if the maximum running length of coded system is 10, may need 200 kinds of different best sequential phase deviations (because there are 100 kinds of possible running length combinations, and may have 2 kinds of different turning (for example " mark " arrives " ”He“ interval, interval " and arrive " mark ")).Therefore, in another embodiment, this determining step comprises: for each the transformation type in style data is selected best sequential phase deviation.This best sequential phase deviation can be used for adjusting transformation sequential (for example, writing laser instrument with the moment opening and closing best) at data writing subsequently in CD.Therefore, can also comprising on the other hand of this method: adjust sequential phase deviation, envelope migration and/or the envelope gain of readback signal, for example, to apply better timing off-set and/or gain to write signal.
Can also measure alone the edge sequential without guiding (unguided) data by measuring technique described herein.The general characteristic dimension that detects good data is relatively easy, and can utilize such characteristic dimension detecting to carry out edge classification.During long write operation, should " without guiding edge sequential " technology allow during write operation, to stop writing, search backward data, read the data sequence writing recently, and measurement time sequence information.Can after having adjusted power or sequential according to the disclosure, again continue write operation alternatively.
In another embodiment, treatment step also comprises the sequential phase error of each transformation in style data is stored in storer.For the best sequential phase deviation that is identified for writing, can process these storing values and change the average sequential phase error of type to determine each.For example,, when processing storing value when determining best write diagnostics, the sequential phase error that can read style data and store from storer.Therefore, sequential phase error can be associated with changing type, and can create the histogram that each changes the sequential phase error of type.Can analyze histogram and be identified for writing the best sequential phase deviation that each changes type.In addition, these data for example can provide, for example, to the valuable observation of write diagnostics (shake) (, when the sequential phase error of a transformation type exists marked change in statistics).Those skilled in the art can select style data to collect the most necessary information.For example, style data can comprise that relatively a large amount of high frequencies changes and the low frequency of relatively small amount changes, and this is write more at large because high frequency changes.
example software
The present invention also comprises and can (for example comprise microcontroller, microprocessor or other instruction processing unit, multi-purpose computer or the workstation of traditional simulation and/or digital signal processor be equipped with) device in implement and/or carry out or can be implemented or algorithm, computer program and/or the software of execution by this device, it is configured to one or more steps of manner of execution and/or one or more operations of hardware.Therefore, the present invention relates to algorithm and/or the software of realization (one or more) method above on the other hand.For example, the present invention can also relate to computer program, computer-readable medium or the waveform of include instruction collection, described instruction set for example, at (the signal processing apparatus of the treatment facility by suitable, for example microcontroller, microprocessor or DSP device) while carrying out, be configured to carry out said method and/or algorithm.
exemplary means
Fig. 3 shows the device 300 for optical storage media 301 being write and/or reading from optical storage media 301.Write circuit 310 is configured to from style source 302, obtain style data and style data are write optical storage media 301.Reading circuit 340 is configured to read the region that optical storage media 301 comprises style data, and produces readback signal.Style analyzer 320 is configured to receive from the style data in style source 302 ' and produce one or more measurement command signals in response to style data.
From the style data in style source 302 ' normally from the copy of the style data in style source 302, it synchronizes with the data that reading circuit 340 reads (for example,, so that style analyzer 320 free copy of analyzing style data before reality reads style from optical storage media 301).For example, style source 302 and/or 302 ' (for example can comprise storer, the storer of the style data that will write optical storage media is also provided), processing, circuit or for example, for produce device, impact damper (, storage is written into the impact damper of the style data of optical storage media 101) of style data etc. according to algorithm.Style source 302 and/or 302 ' can comprise the same area of identical device and/or equipment, or can comprise the zones of different (for example, different storage address) of different equipment and/or equipment.
One or more characteristics that metering circuit 321 is configured to measure readback signal in response to measuring command signal are to produce one or more measurement results.Measurement and analysis device 330 is configured to for example determine, to one or more adjustment of reading characteristic (, the characteristic of reading circuit 340) in response to measurement result.
In various embodiments, optical storage media 301 for example can comprise CD, for example, for example, as Write-once optical disc (, CD-R, DVD-R or DVD+R, BD-R etc.) or rewritable CD (, DVD-RW, DVD+RW or DVD-RAM, BD-RE etc.).
The timing off-set that metering circuit 321 can be configured to measure readback signal in each edge of guiding margin signal 220 (for example, edge 221,222,223 in Fig. 2 and 224 places, synchronously measure the readback signal from reading circuit 340, sequence loop while reading back to adjust with the relatively stable transformation in style data).Metering circuit 321 can also be configured to measure non-timing off-set (for example,, for calibrating write diagnostics) of guiding edge in readback signal.The timing off-set of measuring in readback signal for example can comprise: in the moment corresponding with guiding edge metering instruction, measure the amplitude of readback signal, and calculate timing off-set according to measured amplitude.
Measurement and analysis device 330 can be configured to (for example store according to guiding edge instruction, in register, storer etc.) a plurality of guidings edge and non-guiding edge time migration measured value, and calculate the calibrated skew at non-guiding edge as described herein.In certain embodiments, Measurement and analysis device 330 can be configured to analyze one or more calibrated timing off-sets and write processing to determine that best write diagnostics is calibrated, as the U.S. Patent application No.11/646 being described in more detail for Fig. 3 here and file an application on Dec 26th, 2006, described in 098 (the file number MP0960 of agency).Therefore, Measurement and analysis device 330 can be configured to storage and write calibration data 303 (for example, optkmal characteristics and/or after a while will be used for determine the data of optkmal characteristics).
Fig. 4 shows the exemplary means 400 for extracting style data and/or write instruction from calibrating bit stream.Therefore, style source 102,302 and/or 302 ' can comprise device 400 as described herein.Storer 410 is generally configured to storage corresponding to the data of calibration bit stream.Storer 410 can comprise random access memory (RAM), the nonvolatile memory such as flash memory, ROM (read-only memory) (ROM) and/or other applicable electronic data storage device structure.Storer 410 offers calibration bit stream OPC code translator 420 (for example,, via parallel data bus line and/or serial communication channel) conventionally.
OPC code translator 420 is generally configured to from calibration bitstream extraction calibration style data and calibration command.Calibration command can be synchronizeed with calibration style data substantially.Therefore, OPC code translator 420 can provide with utilizing style data and carry out the corresponding a plurality of output signal S0 of the instruction of coding to S4, and the signal P corresponding with style data.OPC code translator 420 (for example can utilize special circuit, in special IC, or receiving and/or processing from storer 410 or coming in the functional circuit blocks in the larger integrated circuit of data of more large memories of self-contained storer 410) realize, but also can realize for the software of microcontroller or microprocessor.OPC controller 430 can receive signal S0 to S4 and style data P, and control writing module 440 with read module 450 to utilize instruction and style data to determine best write diagnostics.
example system
Consult now Fig. 5, the present invention for example can be embodied in, in optical storage (, CD, DVD, BD etc.) system 510 and realizes.Signal in system 510 is processed and/or control circuit 512 and/or other circuit can comprise OPC circuit and/or can realize the OPC operation that presented herein, and can deal with data, carry out coding and/or encrypt, carry out and calculate and/or format read and/or write the data of optical storage media 516 from optical storage media 516.In some embodiments, the signal processing in system 510 and/or control circuit 512 and/or other circuit (not shown) also can be carried out other function, for example coding and/or decoding and/or any other signal processing function relevant with optical storage system.
System 510 can be communicated by letter with the output device (not shown) such as computing machine, televisor or miscellaneous equipment via one or more wired or wireless communication links 517.System 510 can be connected to storer 519, and storer 519 is for example RAM, ROM, the nonvolatile memory such as flash memory and/or other applicable electronic data storage device structure.
sum up/summarize
Therefore, the invention provides method, software and the device for calibrating the timing off-set that optical storage media is write.The present invention has advantageously provided following ability: accurately measure the variation in optical storage media and/or timing off-set that the write diagnostics that uses causes, and for by time drift in sequence loop or may with medium in variation and/or the timing off-set that causes of the irrelevant other factors of write diagnostics come correcting measuring to skew.For example, for the calibration of power, the standard deviation of determining the edge of readback data may be useful guidance.By the variation of edge type itself and the impact of edge-to-edge variation are separated, can determine and provide the minimum power that can accept shake.For the medium that can read and write, the low-power in read/write operations may be quite favourable, because relatively high power may limit possible rewriting number of times.As a result, sensitive and/or to measure steadily actual jitter (as determined in used certain edge-to-edge data to change to measure) for example, be favourable for the calibration of power on phase change medium (, optical data memory).
The present invention also provides: (for example reading the data that may be written under various conditions, use several different Writing power level, timing off-set etc. to write the calibration style data of optical storage media) during effectively proofread and correct readback signal (for example, reduce shake).Therefore, the invention provides the highly stable measurement to the variation in readback signal.
Aforementioned description to specific embodiments of the invention provides for the purpose of illustration and description.These descriptions are not intended to be detailed or to limit the invention to disclosed precise forms, and obviously can carry out many modifications and changes according to above-mentioned instruction.Selecting and describing embodiment is for principle of the present invention and practical application thereof are described best, make thus others skilled in the art can utilize best the present invention and various embodiment, these embodiment have the various modifications that are suitable for considered special-purpose.Hope is by limiting scope of the present invention in this appended claim and equivalent thereof.
Claims (50)
1. a method of the read operation of optical storage media and/or write operation being proofreaied and correct, the method comprises:
Read the region of optical storage media to produce readback signal, wherein said readback signal comprises a plurality of edges, and described a plurality of edges comprise one or more non-guiding edges and one or more guidings edge;
Measure the timing off-set at least the first non-guiding edge in described one or more non-guidings edge and at least one guiding edge; And
By the linear offset correction values of extracting described the first non-guiding edge of the bit distance based on from described at least one guiding edge, the calibrated skew of calculating described the first non-guiding edge.
2. the method for claim 1, wherein said region comprises predetermined pattern data.
3. method as claimed in claim 2, also comprises:
Process described predetermined pattern data to produce one or more measurement instructions; And
In response to described measurement instruction, measure timing off-set.
4. method as claimed in claim 3, wherein processes described predetermined pattern data and comprises: in described predetermined pattern data, find out the combination of the mark corresponding with guiding edge/interval, and in response to this, produce guiding edge metering instruction.
5. method as claimed in claim 2, also comprises:
According to calibration command, described style data are written to the described region of this optical storage media before reading the described region of optical storage media;
Reception comprises the bit stream of described calibration command and described style data, and wherein said bit stream comprises the described calibration command being superimposed upon in described style data; And
According to described calibration command, measure timing off-set.
6. method as claimed in claim 5, also comprises: the calibrated skew at the one or more non-guiding edge in described non-guiding edge is associated with the one or more calibration command in described calibration command.
7. method as claimed in claim 5, also comprises: the calibrated skew at the one or more non-guiding edge in described non-guiding edge is associated with the one or more running lengths in described predetermined pattern data.
8. the method for claim 1, also comprises:
Measure the timing off-set at a plurality of guidings edge and a plurality of non-guidings edge; And
The calibrated skew for each non-guiding edge at described a plurality of non-guidings edge is calculated in measured skew based on described a plurality of guidings edge.
9. method as claimed in claim 8, also comprises: based on described calibrated skew, calculate at least one timing off-set to described optical storage media data writing.
10. method as claimed in claim 8, also comprises:
Determine the transformation type at each non-guiding edge; And
The calibrated skew at each non-guiding edge is associated with described transformation type.
11. methods as claimed in claim 10, the second mark after wherein said transformation type changes corresponding to the running length at the first mark in described optical storage media before changing and/or interval and this in described optical storage media and/or the running length at interval.
12. methods as claimed in claim 10, also comprise: based on described calibrated skew, calculate at least one timing off-set for data writing corresponding with one of described transformation type.
13. methods as claimed in claim 8, also comprise: the timing off-set of extrapolating between described a plurality of guidings edge, and from the measured timing off-set at described non-guiding edge, deduct extrapolated timing off-set, to calculate the irrelevant edge shake of error in the layout with particular edge.
14. want the method as described in 1 as right, also comprise: according to described timing off-set, adjust the output of phase-locked loop (PLL).
15. 1 kinds of devices that the read operation of optical storage media and/or write operation are proofreaied and correct, this device comprises:
Read module, the region that this read module is configured to read described optical storage media is to produce readback signal, and wherein said readback signal comprises a plurality of edges, and described a plurality of edges comprise one or more non-guiding edges and one or more guidings edge;
Measurement module, this measurement module is configured to measure the timing off-set at least the first non-guiding edge in described one or more non-guidings edge and the timing off-set at least one guiding edge; And
Logic module, this logic module is configured to by the linear offset correction values of extracting described the first non-guiding edge of the bit distance based on from described at least one guiding edge, the calibrated skew of calculating described the first non-guiding edge.
16. devices as claimed in claim 15, wherein said region comprises predetermined pattern data.
17. devices as claimed in claim 16, also comprise style processing module, be configured to process described predetermined pattern data to produce one or more measurement instructions, the described region of wherein said optical storage media comprises described predetermined pattern data, and described measurement module is also configured to measure timing off-set in response to described measurement instruction.
18. devices as claimed in claim 17, wherein said style processing module is also configured to:
In described predetermined pattern data, find out the combination of the mark corresponding with guiding edge/interval; And
In response to this, produce guiding edge metering instruction.
19. devices as claimed in claim 16, also comprise writing module, are configured to, according to calibration command, described predetermined pattern data are write to described optical storage media.
20. devices as claimed in claim 19, wherein said logic module is also configured to the calibrated skew at the one or more non-guiding edge in described non-guiding edge to be associated with the one or more calibration command in described calibration command.
21. devices as claimed in claim 19, wherein said logic module is also configured to the calibrated skew at the one or more non-guiding edge in described non-guiding edge to be associated with the one or more running lengths in described predetermined pattern data.
22. devices as claimed in claim 15, wherein:
Described read module also comprises phase-locked loop PLL; And
Described logic module is also configured to described PLL, provide PLL to adjust signal according to the timing off-set at one or more guidings edge.
23. devices as claimed in claim 15, wherein:
Described measurement module is also configured to measure the timing off-set at a plurality of guidings edge and a plurality of non-guidings edge; And
Described logic module is configured to the calibrated skew that each the non-guiding edge in described a plurality of non-guidings edge is calculated in the measured skew at the one or more guidings edge based in described a plurality of guidings edge.
24. devices as claimed in claim 23, wherein said logic module is also configured to calculate for data being write at least one write diagnostics of described optical storage media based on described calibrated skew.
25. devices as claimed in claim 23, wherein said logic module is also configured to:
Determine the transformation type at each non-guiding edge; And
The calibrated skew at each non-guiding edge is associated with described transformation type.
26. 1 kinds of methods that the read operation of optical storage media and/or write operation are proofreaied and correct, the method comprises:
Read the region of optical storage media to produce readback signal, wherein said readback signal comprises a plurality of edges, and described a plurality of edges comprise one or more non-guiding edges and one or more guidings edge;
Measure the timing off-set at least the first non-guiding edge in described one or more non-guidings edge and at least one guiding edge; And
Calibrated skew based on calculating described the first non-guiding edge at front guiding edge and the measured timing off-set at rear guiding edge.
27. methods as claimed in claim 26, wherein said region comprises predetermined pattern data.
28. methods as claimed in claim 27, also comprise:
Process described predetermined pattern data to produce one or more measurement instructions; And
In response to described measurement instruction, measure timing off-set.
29. methods as claimed in claim 28, wherein process described predetermined pattern data and comprise: in described predetermined pattern data, find out the combination of the mark corresponding with guiding edge/interval, and in response to this, produce guiding edge metering instruction.
30. methods as claimed in claim 27, also comprise:
According to calibration command, described style data are written to the described region of this optical storage media before reading the described region of optical storage media;
Reception comprises the bit stream of described calibration command and described style data, and wherein said bit stream comprises the described calibration command being superimposed upon in described style data; And
According to described calibration command, measure timing off-set.
31. methods as claimed in claim 30, also comprise: the calibrated skew at the one or more non-guiding edge in described non-guiding edge is associated with the one or more calibration command in described calibration command.
32. methods as claimed in claim 30, also comprise: the calibrated skew at the one or more non-guiding edge in described non-guiding edge is associated with the one or more running lengths in described predetermined pattern data.
33. methods as claimed in claim 26, also comprise:
Measure the timing off-set at a plurality of guidings edge and a plurality of non-guidings edge; And
The calibrated skew for each non-guiding edge at described a plurality of non-guidings edge is calculated in measured skew based on described a plurality of guidings edge.
34. methods as claimed in claim 33, also comprise: based on described calibrated skew, calculate at least one timing off-set to described optical storage media data writing.
35. methods as claimed in claim 33, also comprise:
Determine the transformation type at each non-guiding edge; And
The calibrated skew at each non-guiding edge is associated with described transformation type.
36. methods as claimed in claim 35, the second mark after wherein said transformation type changes corresponding to the running length at the first mark in described optical storage media before changing and/or interval and this in described optical storage media and/or the running length at interval.
37. methods as claimed in claim 35, also comprise: based on described calibrated skew, calculate at least one timing off-set for data writing corresponding with one of described transformation type.
38. methods as claimed in claim 33, also comprise: the timing off-set of extrapolating between described a plurality of guidings edge, and from the measured timing off-set at described non-guiding edge, deduct extrapolated timing off-set, to calculate the irrelevant edge shake of error in the layout with particular edge.
39. want the method as described in 26 as right, also comprise: according to described timing off-set, adjust the output of phase-locked loop (PLL).
40. 1 kinds of devices that the read operation of optical storage media and/or write operation are proofreaied and correct, this device comprises:
Read module, the region that this read module is configured to read described optical storage media is to produce readback signal, and wherein said readback signal comprises a plurality of edges, and described a plurality of edges comprise one or more non-guiding edges and one or more guidings edge;
Measurement module, this measurement module is configured to measure the timing off-set at least the first non-guiding edge in described one or more non-guidings edge and the timing off-set at least one guiding edge; And
Logic module, this logic module is configured to the calibrated skew of calculating described the first non-guiding edge at front guiding edge and the measured timing off-set at rear guiding edge based at least.
41. devices as claimed in claim 40, wherein said region comprises predetermined pattern data.
42. devices as claimed in claim 41, also comprise style processing module, be configured to process described predetermined pattern data to produce one or more measurement instructions, the described region of wherein said optical storage media comprises described predetermined pattern data, and described measurement module is also configured to measure timing off-set in response to described measurement instruction.
43. devices as claimed in claim 42, wherein said style processing module is also configured to:
In described predetermined pattern data, find out the combination of the mark corresponding with guiding edge/interval; And
In response to this, produce guiding edge metering instruction.
44. devices as claimed in claim 41, also comprise writing module, are configured to, according to calibration command, described predetermined pattern data are write to described optical storage media.
45. devices as claimed in claim 44, wherein said logic module is also configured to the calibrated skew at the one or more non-guiding edge in described non-guiding edge to be associated with the one or more calibration command in described calibration command.
46. devices as claimed in claim 44, wherein said logic module is also configured to the calibrated skew at the one or more non-guiding edge in described non-guiding edge to be associated with the one or more running lengths in described predetermined pattern data.
47. devices as claimed in claim 40, wherein:
Described read module also comprises phase-locked loop PLL; And
Described logic module is also configured to described PLL, provide PLL to adjust signal according to the timing off-set at one or more guidings edge.
48. devices as claimed in claim 40, wherein:
Described measurement module is also configured to measure the timing off-set at a plurality of guidings edge and a plurality of non-guidings edge; And
Described logic module is configured to the calibrated skew that each the non-guiding edge in described a plurality of non-guidings edge is calculated in the measured skew at the one or more guidings edge based in described a plurality of guidings edge.
49. devices as claimed in claim 48, wherein said logic module is also configured to calculate for data being write at least one write diagnostics of described optical storage media based on described calibrated skew.
50. devices as claimed in claim 48, wherein said logic module is also configured to:
Determine the transformation type at each non-guiding edge; And
The calibrated skew at each non-guiding edge is associated with described transformation type.
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| US61/027,992 | 2008-02-12 | ||
| PCT/US2009/030878 WO2009091753A1 (en) | 2008-01-14 | 2009-01-13 | Circuits, architectures, apparatuses, systems. algorithms and methods and software for timing calibration for optical disc recording |
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| CN101911196A CN101911196A (en) | 2010-12-08 |
| CN101911196B true CN101911196B (en) | 2014-03-12 |
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| CN1312563A (en) * | 2000-02-25 | 2001-09-12 | 索尼公司 | Recording medium, recording apparatus and read apparatus |
| CN1937045A (en) * | 2005-09-23 | 2007-03-28 | 马维尔国际贸易有限公司 | Automatic write strategy calibration method for optical drive |
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| JP2907986B2 (en) * | 1990-09-28 | 1999-06-21 | 株式会社日立製作所 | Recording / reproducing method for optical recording medium |
| JP3807062B2 (en) * | 1997-03-14 | 2006-08-09 | 株式会社日立製作所 | Recording method, phase shift detection circuit, and information apparatus using them |
| JP2000123369A (en) * | 1998-10-13 | 2000-04-28 | Hitachi Ltd | Method and device for recording information |
| JP2001209940A (en) * | 1999-11-16 | 2001-08-03 | Victor Co Of Japan Ltd | Optical disk recording/reproducing device, optical disk recording/reproducing method and optical disk |
| US6631108B1 (en) * | 2000-04-03 | 2003-10-07 | Hewlett-Packard Development Company, L.P. | Method for accurate positioning of data marks and spaces on an optical disc |
| JP2005063533A (en) * | 2003-08-08 | 2005-03-10 | Toshiba Corp | Information recording medium, recording method for information recording medium and information recording and reproducing device |
| JPWO2005029479A1 (en) * | 2003-09-18 | 2006-11-30 | 松下電器産業株式会社 | Recording / reproducing method and recording / reproducing apparatus |
| WO2006112277A1 (en) * | 2005-04-14 | 2006-10-26 | Matsushita Electric Industrial Co., Ltd. | Method for optimizing recording pulse condition in data recording to optical information recording medium |
| US7839739B2 (en) * | 2006-02-24 | 2010-11-23 | Marvell World Trade Ltd. | Circuits, architectures, apparatuses, systems, algorithms and methods and software for optimum power calibration for optical disc recording |
-
2009
- 2009-01-13 CN CN200980102182.0A patent/CN101911196B/en not_active Expired - Fee Related
- 2009-01-13 JP JP2010542426A patent/JP5582407B2/en not_active Expired - Fee Related
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312563A (en) * | 2000-02-25 | 2001-09-12 | 索尼公司 | Recording medium, recording apparatus and read apparatus |
| CN1937045A (en) * | 2005-09-23 | 2007-03-28 | 马维尔国际贸易有限公司 | Automatic write strategy calibration method for optical drive |
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| WO2009091753A8 (en) | 2010-07-29 |
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