CN101154413B - Method for judging disc pattern - Google Patents
Method for judging disc pattern Download PDFInfo
- Publication number
- CN101154413B CN101154413B CN200610159918A CN200610159918A CN101154413B CN 101154413 B CN101154413 B CN 101154413B CN 200610159918 A CN200610159918 A CN 200610159918A CN 200610159918 A CN200610159918 A CN 200610159918A CN 101154413 B CN101154413 B CN 101154413B
- Authority
- CN
- China
- Prior art keywords
- disc
- read head
- optical read
- radio frequency
- zone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
A method for judging disc status includes the following steps: an optical read head is moved to an initial position which is at a preset distance away from the inside track of a disc; the disc is turned for focusing and the optical read head is moved towards the inside track till the read head returns to the original position or the focusing fails; meanwhile, radio frequency integration filtering signal is read and the maximum value and the minimum value of the signal during moving is recorded; when the optical read head stops moving, whether the difference of the maximum value and the minimum value is more than a preset critical value is compared; if the difference is more than the preset critical value, the disc is set as a second type disc; if the difference is less than or equal to the preset critical value, which shows the disc is a first type disc. By means of the radio frequency integration filtering signal, the invention judges whether the read disc is a disc with complete record and data integrity, a blank disc, a disc with part record and invalid data, a disc with part record and data integrity, or a record disc with part record and incomplete data.
Description
Technical field
The invention relates to the recorded data area and the method for recorded data zone not sought, particularly about utilizing data Layer reflection strength on the disc to judge this position whether the searching recorded data area and the method for recorded data zone not of recorded data.
Background technology
For known light memory medium player (Disk Player), because itself do not have in the disc ability of record data zones locking data tracks (Tracking On) not.So after must guaranteeing that on it is used optical read head focuses on, be positioned the recorded data zone in the time of carrying out orbit determination control.
Fig. 1 is known optical read head (Optical head) locator meams synoptic diagram.As shown in the drawing, disc 11 includes Lead-In Area (Lead In Area), data field, leading-out zone (Lead Out Area) and recording areas not.Control module 12 utilizes driving circuit 13 to drive engine 14 after sending drive signal to driving circuit 13, uses moving of control optical read head 16.Usually utilize the limit switch 15 in the optically read mechanism to do playback (Homing) in the known practice, utilize previous driving voltage through experiment that optical read head 16 is moved and count schedule time behind the disengaging limit switch toward the outer ring again, stop to move of optical read head 16 then and do the location.Therefore known method must verify in advance that multiple different disc overcomes amount of variability with different optically read mechanism.
In addition, the function that adapts to player (Disk Recorder) with writing function, it will allow the complete use of user whole recordable type light storage disc or in order still will to add the relation of the data of record more in the future, the action of can select behind each record data of having derived whether to finish (Finalize).If select to finish, then archives economy, Lead-In Area and leading-out zone can be carried out record, make this disc can generally be compatible with various light memory medium players (Disk Player).If non-selected finishing (Finalize) then can not carried out complete documentation with archives economy, Lead-In Area and leading-out zone, so this disc only can be play by the player with writing function mostly.
When reading recordable type light memory medium (CD-R, CD-RW, DVD+R/+RW, DVD-R/-RW or the like) in common light memory medium player, optical read head could produce correct seeking signal (with reference to figure 1) in the time of must focusing on recorded data regional.If after focusing on data Layer, but when should the zone not writing down any signal, known player orbit determination control system causes the focus point of optical read head to be fixed in and causes the orbit determination control system to lose efficacy on the data-track because can't produce correct seeking signal at the zone of record data not.And the framework of its optical read head of player with writing function is with the front end signal processing mode with to be used to the player play purely different, therefore on white space, still have the ability that produces seeking signal, therefore can be fixed on the data-track of record data not.
For fear of this orbit determination problems, locate with limit switch and predetermined a period of time in the known practice.But the recordable type light memory medium may be because the user only writes down a spot of data, shared zone is very little (with reference to figure 2 after causing Lead-In Area to add data field (Data Area) and leading-out zone, Fig. 2 is the synoptic diagram of the recordable disc medium that only write down low volume data and finished), perhaps the user carries out record data with the recordable optical player, but do not carry out the action that finishes, cause the data of Lead-In Area only to write down the minority track.This moment is if the data of data field also under seldom the situation, can may only have 1mm following (with reference to figure 3, Fig. 3 is the synoptic diagram of the recordable disc medium that only write down low volume data and do not finish) for the zone of orbit determination control.Under this situation,, be extremely difficult with the location that known method is done the optical read head reference position.Because the friction force in the optically read mechanism also can't be in full accord, and the reference position of imprinting also has a little difference on the disc, or driving circuit itself also has drift and difference exists.When therefore utilizing known method to read, might suffer from the situation that reads failure.
In addition, for the recordable type light memory medium that finishes, because it is not noted down archives economy and complete import information, therefore known read-only player also can't be play this recordable type light memory medium.
Summary of the invention
Because the problems referred to above, the objective of the invention is to propose a kind ofly to utilize data Layer reflection strength on the disc to judge the whether method of recorded data of this position, and utilize the method earlier the record kenel of disc to be divided into two classes.The first kind is a not record data or data complete documentation of complete blank; And second class is recording section data, but whether uncertain data is complete.
For reaching above-mentioned classification purpose, the present invention is that the disc classification of utilizing radio frequency integration kalman filter signal to judge to desire to read is first kind disc (complete documentation or blank) or the second class disc (non-complete documentation), this method comprises the following step: optical read head is moved to reference position, and this reference position is the position away from disc inner ring one preset distance; Rotate the disc line focusing of going forward side by side, and optical read head moved up to optical read head towards the inner ring direction playbacked or focus on failure, and read radio frequency integration kalman filter signal, and in moving process the maximal value and the minimum value of this radio frequency integration kalman filter signal of record; Optical read head stops to move, and whether the difference of comparison maximal value and minimum value is greater than a predetermined critical; If it is the second type disc that this difference is then set this disc greater than this predetermined critical; If this difference is less than or equal to this predetermined critical and represents that then this disc is a first kind disc.
For first kind disc,, optical read head is moved a set time and activates orbit determination control towards the outer ring direction for confirming that further content is the blank or the disc of complete documentation.If orbit determination control failure represents that then this disc is a blank discs, stop action; If orbit determination controls successfully, represent that then disc is complete documentation and the data discs that finished, enters playing program.In addition,, also to read the data that write down on the disc, and judge whether that success carries out data decoding, fail, represent that then this disc is invalid disc, stop to move if carry out data decoding if rail control successfully; If carry out the data decoding success, represent that then disc is normal disc, carries out playing program.
And for the judgement for having finished or do not finished of the disc data content of second type, still utilize radio frequency integration kalman filter signal and optical read head moved towards the outer ring direction and look for the block that whether has 0x30000h.Represent that then this disc finishes for data if exist; Do not represent that then data do not finish if do not exist.If can not find any recorded data area that is positioned at behind the 0x30000h, represent that then this disc is that partial record and data are invalid.
The present invention also provides a kind of recordable type disc to be finish the disc or the determination methods of the disc that does not finish, comprise the following step: optical read head is moved a predetermined hunting time by the inner ring of disc towards the outer ring of this disc, and to search zone that optical read head read be that recorded data zone, data decoding success and address that should the zone are greater than 0x30000h; If search time does not find data field greater than 0x30000h yet greater than aforementioned predetermined hunting time, judge that then this disc is invalid disc; Carry out orbit determination control and start the trailer system of seeking jumping onto the tracks,, set disc, read information such as archives economy, and be sent to mpeg system and play for the disc that finishes if the 0x30000h recorded data is represented in the success of jumping onto the tracks to the position of 0x30000h; If jump onto the tracks to the position failure of 0x30000h, then set disc and be the disc that do not finish, and close the orbit determination control function; Continuation is moved the inner ring of this optical read head by disc towards the outer ring of this disc, and searches non-recorded data zone in the zone that this optical read head focuses on; This optical read head is moved towards inner ring by the disc outer ring, and to search the zone that present optical read head focuses on be the recorded data zone; After this optical read head moved a Preset Time by the disc outer ring towards inner ring, start the line data decoding of going forward side by side of orbit determination control function and fail up to data decoding; And the bug check sign indicating number block that last decoding success of mpeg system is provided, then this mpeg system can be obtained the information and the file structure of broadcast according to the bug check sign indicating number block of last decoding success, plays the disc contents of the action that finishes.
The present invention utilizes the method for radio frequency integration kalman filter signal disc contents can be categorized as complete documentation disc, blank discs, non-complete documentation but disc or non-complete documentation and the invalid disc of data that the disc that data have finished, non-complete documentation and data do not finish, the subsequent treatment of being correlated with according to classification results.
Description of drawings
Fig. 1 is a known optical read head locator meams synoptic diagram.
Fig. 2 is the synoptic diagram of the recordable disc medium that only write down low volume data and finished.
Fig. 3 is the synoptic diagram of the recordable disc medium that only write down low volume data and do not finish.
Fig. 4 is the detecting unit distribution plan of the optical detector of optical read head.
Fig. 5 is the reflection strength signal at the recorded data zone and the synoptic diagram of the fluctuation in record data zone not.
Fig. 6 be recorded data zone and not the record data zone in the distribution plan on the disc, corresponding to the waveform of the radio frequency integrated signal of above-mentioned distribution plan and corresponding to the radio frequency integration kalman filter signal of this distribution plan and the setting key diagram between each echo area.
Fig. 7 is the process flow diagram of normal disc, invalid disc or recordable type disc for the present invention judges disc.
Fig. 8 has finished for general DVD recordable type disc content writes regional distribution chart.
It write regional distribution chart when Fig. 9 did not finish for general DVD recordable type disc content.
Figure 10 A and Figure 10 B are finish the disc or the decision flow chart of the disc that does not finish for the recordable type disc.
Figure 11 A～Figure 11 F is different disc contents move voltage and limit switch signal at radio frequency integrated signal, radio frequency integration kalman filter signal, optical read head near the limit switch place a waveform.
Graphic numbering:
11,21 discs
12 control modules
13 driving circuits
14 engines
15 limit switches
16 optical read heads
17 laser beam
Embodiment
Seek the recorded data area and the method for recorded data zone not below with reference to graphic detailed description the present invention.
The present invention mainly is whether the current position that utilizes variation of the reflection strength of optical signalling (radiofrequency signal) and collocation mobile optical read head to differentiate discs has record data.And the change of reflection signal of optical signalling equal ubiquity in known read-only light memory medium player does not need the extra design that increases.The generation of disc reflection strength signal often utilizes RF_SUM=A+B+C+D or RF_SUM=E+F (with reference to figure 4) or RF_SUM=PUHRF (most optical read heads can be exported the PUHRF signal, and this signal is similar to A+B+C+D) on to the CD light path; For then RF_SUM=a+b+c+d or the RF_SUM=PUHRF (most optical read heads can be exported the PUHRF signal, and this signal is similar to A+B+C+D) of utilizing of DVD light path more.Fig. 4 is the detecting unit distribution plan of the optical detector of optical read head.
Fig. 5 is the reflection strength signal at the recorded data zone and the synoptic diagram of the fluctuation in record data zone not.Be generally in the application and avoid noise problem or, radio frequency integrated signal RF_SUM can be obtained radio frequency integration kalman filter signal RF_SUM_LPF through a low-pass filter for fear of the different influence of data point reflection strength that is subjected to write down on the disc.Whether be used to differentiate focus signal radio frequency integration kalman filter signal RF_SUM_LPF is known finishes more.Promptly when radio frequency integration kalman filter signal RF_SUM_LPF is higher than a certain predefined comparative level, then judge to focus on successfully, otherwise, if be lower than this comparative level, judge that then focusing fails.
Fig. 6 be recorded data zone and not the record data zone in the distribution plan on the disc, corresponding to the waveform of the radio frequency integrated signal of this distribution plan, corresponding to the radio frequency integration kalman filter signal of this distribution plan and the setting key diagram between each echo area.With reference to figure 6, utilize the reflection strength of optical signalling to change to distinguish recorded data area and recorded data zone not among the present invention, can effectively avoid the shortcoming of aforementioned known techniques.The utilization that the reflection strength of optical signalling is changed in the past only is to judge whether focus on success or whether signal exists defective (DEFECT) at present.But for the recordable type light memory medium, can determine low reflection, high reflection and total reflection according to the reflection strength of its optical signalling.Low reflective representation focuses on failure or present regional defectiveness at present; High reflective representation focuses on the data Layer, and current position has record data; Total reflection expression focuses on the data Layer, but current position record data not.
For the recordable type light memory medium that finishes,, therefore also can't directly read because it does not write down archives economy and complete Lead-In Area information.But this disc has the relevant broadcast information of record in last track in recorded data zone.If the method that therefore can utilize the present invention to propose can find the recorded data zone and the intersection in record data zone not.Move a plurality of data-tracks at intersection to disc inner ring direction and (recorded the data field because begin to enter, so seeking signal can normally occur, number of tracks is calculated), the decision of number of tracks enters steady state (SS) for considering according to enough orbit determination control, then cut orbit determination control, the line data of going forward side by side decoding can be found the broadcast information that is write down in last rail of this data field.
The present invention utilizes to be commonly used to the radio frequency integration kalman filter signal RF_SUM_LPF that judges whether focusing is finished in the known technology, and it is subdivided into three intervals, comprises between total reflection interval, high-reflection region and between low echo area.At first the variation of the radio frequency integration kalman filter signal RF_SUM_LPF on the corresponding disc is at present obtained in the position of mobile optical read head.According to the result of variations of radio frequency integration kalman filter signal RF_SUM_LPF set up between total reflection interval, high-reflection region and low echo area between.Afterwards, just visual application decides subsequent step.For example the position of mobile optical read head and present radio frequency integration kalman filter signal RF_SUM_LPF look for and can look for latter end data area in last recorded data zone for the recorded data zone of orbit determination control or the position of mobile optical read head once more, with the relevant broadcast information of light memory medium that reads the action that finishes.
Fig. 7 is the process flow diagram of normal disc, invalid disc or recordable type disc for the present invention judges disc.This process flow diagram is to illustrate how to utilize radio frequency integration kalman filter signal to judge that disc is normal disc, invalid disc or recordable type disc.
Step S702: beginning.
Step S704: optical read head is moved to reference position.This reference position be than on the known applications away from the position of disc inner ring.For example, with optical read head playback back toward the outer ring direction move to than on the known applications away from the position of disc inner ring.
Step S706: rotate the disc line focusing of going forward side by side.Focusing on success or not then judges according to reflection strength with known technology.Then carry out step S708 after focusing on successfully.
Step S708: optical read head is moved towards the inner ring direction.Wherein, the timing definition that optical read head begins to move is t0, and the driving voltage of mobile optical read head is defined as V.
Step S710: read radio frequency integration kalman filter signal RF_SUM_LPF, and write down maximal value R_Max and the minimum value R_Min of this radio frequency integration kalman filter signal RF_SUM_LPF.
Step S712: whether the detecting optical read head playbacks (also being whether detecting limit switch 15 is activated) or focuses on failure.If optical read head is not failure of playback or focusing as yet, then rebound step S708; If optical read head has playbacked or focused on failure, then skip to step S714.
Step S714: optical read head stops to move.And the timing definition that optical read head stops to move is t1.Also be that optical read head has moved the time of (t1-t0) altogether.
Step S716: relatively whether the difference of maximal value R_Max and minimum value R_Min is less than a predetermined critical.If this difference less than this predetermined critical, skips to step S717, otherwise skips to step S718.
Step S718: setting disc is the recordable type disc, carries out the determining program whether disc has finished.
Step S717: the focus point of optical read head is moved to the disc outer ring, and the voltage and the time of moving are equal to S708～S714 step.Also promptly, drive optical read head moves (t1-t0) towards the disc outer ring time with driving voltage V.
Step S720: start orbit determination control.If orbit determination control failure represents that then this disc is a blank discs, skips to step S724; If orbit determination control successfully, represent that then disc is a complete documentation type discs, skip to step S722 and continue the follow-up dish of reading and move.
Step S722: judge whether that success carries out data decoding.If carry out the data decoding failure, represent that then this disc is invalid disc, skips to step S724; If carry out the data decoding success, represent that then disc is a complete documentation type discs, skips to step S726 and continues follow-up action.
Step S724: show disc for can't play disc, and stop action.
Step S726: carry out known playing program.
So according to above-mentioned steps, the present invention utilizes radio frequency integration kalman filter signal can classify disc contents in advance for complete documentation disc, blank discs, invalid disc or recordable type disc but the uncertain disc that whether finishes, the subsequent treatment of the line correlation of going forward side by side.
The determination methods in recorded data of the present invention zone below is described.At first the maximal value R_Max with radio frequency integration kalman filter signal deducts the first total reflection critical value of the interval lower limit of a total reflection (total reflection lowerlimitation) as radio frequency integration kalman filter signal; And the maximal value R_Max of radio frequency integration kalman filter signal added the second total reflection critical value of the interval higher limit of a total reflection (total reflection upperlimitation) as radio frequency integration kalman filter signal.This first total reflection critical value and the second total reflection critical value are as the judgement interval value in total reflection zone.In addition, the minimum value R_Min with radio frequency integration kalman filter signal deducts the first high reflection critical value of lower limit between a high-reflection region (high reflection lowerlimitation) as radio frequency integration kalman filter signal; And the minimum value R_Min of radio frequency integration kalman filter signal added the second high reflection critical value of higher limit between a high-reflection region (high reflection upperlimitation) as radio frequency integration kalman filter signal.This first high reflection critical value and the second high reflection critical value are as the judgement interval value in high-reflection region territory.Afterwards, in the process that moves of optical read head, system takes a sample in real time to radio frequency integration kalman filter signal RF_SUM_LPF, utilizes the judgement interval value of total reflection and the judgement interval value in high-reflection region territory, judges whether present optical read head focal position is the zone of recorded data.Also promptly, when the judgement interval value that radio frequency integration kalman filter signal RF_SUM_LPF falls within the high-reflection region territory, represent that then the optical read head focal position is the zone of recorded data.
Be judged as the recordable type disc when disc but during the uncertain disc that whether finishes, can judge further that present recordable type disc is finished disc or the disc that does not finish.Next how explanation judges that present recordable type disc is finished disc or the disc that does not finish.Fig. 8 has finished for general DVD recordable type disc content writes regional distribution chart; It write regional distribution chart when Fig. 9 did not finish for general DVD recordable type disc content.In Fig. 8, it can be divided into Lead-In Area, file structure and broadcast information district and data recorded area and leading-out zone.Among Fig. 8, Fig. 9, the data kenel of regional A1～G1 is described as follows:
Zone A1: the zone is write in the examination that writes laser power for adjustment, and the examination writing position can be different according to disc kind, and length is write in examination can be according to writing disc player manufacturer and difference.
Area B 1: data working area, temporary data that write (as home record address of user's recorded segment or the like) and data length can be different different because of disc kind and disc player manufacturer, general about 2～5 ECC Block length, about only 1～2 data track, the player utmost point is difficult to this district and obtains data.
Zone C 1: be used for writing down the information such as archives economy of user's record data fragment, reference position 0x30000h, length is unfixing.
Region D 1: the user is recorded segment for the first time.
Area E 1: the record user is mandate (Authoring) mode and the archives economy of recorded segment for the first time.
Zone F1: the user is recorded segment for the second time.
Zone G1: the record user for the first time with the authorization and the archives economy of the recorded segment second time.
As shown in Figure 8, it is the continuous recording zone after Lead-In Area, so can follow rail control normally and jump onto the tracks control (read-only type disc is with this type of practice) as long as at the beginning optical read head is focused on this zone.
Do not finish disc framework as shown in Figure 9 because therefore the recordable type disc player has only write down a spot of broadcast information in area E 1 and regional G1 for keeping the follow-up record data that can continue of user, comprised area E 1 among the regional again G1 in fact.As long as so we provide the broadcast information of regional G1 for deciphering end, the decoding end can correspondingly provide the lengthy content of information judgement user data in reference position, thereby plays.
Figure 10 A and Figure 10 B are finish the disc or the process flow diagram of the disc that does not finish for judging the recordable type disc.Below please refer to Figure 10 A and Figure 10 B further specifies, this flow process continues from Fig. 7 step S718.
Step S1002: beginning.
Step S1006: optical read head is moved towards the outer ring by the disc inner ring.
Step S1008: judge whether the zone that present optical read head focuses on is the recorded data zone.Also promptly, utilize the determination methods in above-mentioned recorded data zone to judge.If the zone of optical read head focusing at present is not the recorded data zone, then enter step S1009; If the zone of optical read head focusing at present is the recorded data zone, then skip to step S1010.
Whether the traveling time of step S1009: calculation procedure S1006 is greater than a predetermined value, if greater than a predetermined value, expression is moved time enough by inner ring toward the outer ring, but does not find the recorded data area greater than address 0x30000h yet, then enters among the step S1022; If not yet greater than a predetermined value, then enter step S1006, continue to seek toward the disc outer ring.
Step S1010: start the orbit determination control function, and attempt carrying out data decoding.
Step S1012: detect whether data decoding is successful.If regional A1 (with reference to figure 8) is write for examination in the zone at present, then data decoding may be failed (deciding on the data that recordable type CD-ROM drive examination originally writes when writing), then skips to step S1014, continues to seek next recorded data; If the data decoding success then skips to step S1020.
Step S1014: close the orbit determination control function.
Step S1016: continue optical read head is moved towards the outer ring by the disc inner ring.
Step S1018: judge whether the zone that present optical read head focuses on is the recorded data zone.If the zone of optical read head focusing at present is not the recorded data zone, then rebound step S1006; If the zone of optical read head focusing at present is the recorded data zone, then enter step S1019.
Whether the traveling time of step S1019: calculation procedure S1016 is greater than a predetermined value, if then enter step S1010 greater than this predetermined value; If not greater than this predetermined value, then enter step S1016 and continue the mobile optical read head.
Step S1020: confirm that whether present address is less than 0x30000h.When disc contents for finishing, at this point location 0x30000h begins to write the broadcast information of disc contents and file structure or the like.If present address less than 0x30000h, then skips to step S1014, continue to seek next recorded data area; If present address then skips to step S1023 more than or equal to 0x30000h.
Step S1023: carry out orbit determination control and start the trailer system of seeking attempt jumping onto the tracks position to 0x30000h.The 0x30000h recorded data is represented in success if jump onto the tracks, and then skips to step S1024; The failure if jump onto the tracks then skips to step S1040.
Step S1024: set disc for the disc that finishes, read information such as archives economy, and be sent to and skip to step S1070 after mpeg system (step S1026) is play.
Step S1040: the setting disc is the disc that do not finish.
Step S 1042: close the orbit determination control function.
Step S1044: continue optical read head is moved towards the outer ring by the disc inner ring.
Step S1046: judge whether the zone that present optical read head focuses on is the recorded data zone.If the zone of optical read head focusing at present is not the recorded data zone, then skip to step S1048; If the zone of optical read head focusing at present is the recorded data zone, then rebound step S1044 continues the mobile optical read head.
Step S1048: optical read head is moved towards inner ring by the disc outer ring.
Step S1050: judge whether the zone that present optical read head focuses on is the recorded data zone.If the zone of optical read head focusing at present is not the recorded data zone, then rebound step S1048; If the zone of optical read head focusing at present is the recorded data zone, then skip to step S1052.
Step S1052: set an optical read head traveling time (making orbit determination control can stablize the line data decoding of going forward side by side) to determine having enough track bar numbers.
Step S1054: optical read head is moved towards inner ring by the disc outer ring.
Step S1056: whether detecting optical read head traveling time finishes.If the optical read head traveling time does not finish as yet, then rebound step S1054; If the optical read head traveling time finishes, then skip to step S1058.
Step S1058: optical read head stops to move.
Step S1060: start the orbit determination control function.
Step S1062: carry out data decoding.
Step S1064: whether detecting data decoding fails.If detecting data is successfully decoded, then rebound step S1062 continues decoding; If the detecting data decoding failure then skips to step S1066.
Step S1066: the bug check sign indicating number block (ECCBlock) that last decoding success of mpeg system is provided, then mpeg system can be obtained the information and the file structure of broadcast according to the bug check sign indicating number block of last decoding success, play the disc contents of action that finishes, and skip to step S1070.
Step S1070: finish.
So according to above-mentioned steps, it is finished the disc or the disc that do not finish that the present invention can judge according to the DATA DISTRIBUTION situation of disc, and further the disc of different kenels is read relevant information, and offer mpeg system and play.
Figure 11 A～Figure 11 F is different disc contents move voltage and limit switch signal at radio frequency integrated signal, radio frequency integration kalman filter signal, optical read head near the limit switch place a waveform.Wherein Figure 11 A is that blank content, Figure 11 B are that the disc, Figure 11 C of complete documentation is that disc and Figure 11 F that data do not finish is partial record and the invalid disc of data for disc, Figure 11 D, Figure 11 E that data finish.Therefore, the present invention can according to shown in the variation of waveform correctly tell the disc of different content.
Though more than with embodiment the present invention is described, therefore do not limit scope of the present invention, only otherwise break away from main idea of the present invention, the sector person can not carry out various distortion or change.
Claims (3)
1. method of judging disc pattern, it is to utilize the radiofrequency signal after integrating to judge that through the radio frequency integration kalman filter signal that produces behind the low-pass filter disc that is read is normal disc, blank discs, invalid disc or recordable type disc, it is characterized in that this method comprises the following step:
Optical read head is moved to an initial position, and this reference position is the position of the preset distance of being separated by away from the disc inner ring;
Rotate the disc line focusing of going forward side by side, and optical read head moved up to optical read head towards the inner ring direction playbacked or focus on failure, and read radio frequency integration kalman filter signal, and write down the maximal value and the minimum value of this radio frequency integration kalman filter signal;
Optical read head stops to move, and relatively whether a difference of the maximal value of this radio frequency integration kalman filter signal and minimum value is greater than a predetermined critical, if this difference is greater than this predetermined critical, then setting this disc is the recordable type disc;
If this difference is less than or equal to this predetermined critical, then with optical read head after a schedule time is moved in the disc outer ring, activate orbit determination control, if orbit determination control failure represents that then this disc is a blank discs, stop action;
If orbit determination control successfully, read the data that write down on the disc, and judge whether that success carries out data decoding, fail if carry out data decoding, represent that then this disc is invalid disc, stop to move; And
If carry out the data decoding success, represent that then disc is normal disc, carries out playing program.
2. the method for judgement disc pattern as claimed in claim 1 is characterized in that, is the recordable type disc when setting this disc, is to comprise the following step to judge that this recordable type disc is finish disc or the disc that does not finish:
Optical read head is moved a predetermined hunting time by the inner ring of disc towards the outer ring of this disc, and to search the zone that optical read head read be the recorded data zone of address greater than 0x30000h and data decoding success;
If search time does not find data field greater than 0x30000h yet greater than aforementioned predetermined hunting time, judge that then this disc is invalid disc;
Carry out orbit determination control and start the trailer system of seeking jumping onto the tracks,, set disc, read information such as archives economy, and be sent to mpeg system and play for the disc that finishes if the 0x30000h recorded data is represented in the success of jumping onto the tracks to the position of 0x30000h;
If jump onto the tracks to the position failure of 0x30000h, then set disc and be the disc that do not finish, and close the orbit determination control function;
Continuation is moved the inner ring of this optical read head by disc towards the outer ring of this disc, and searches non-recorded data zone in the zone that this optical read head focuses on;
This optical read head is moved towards inner ring by the disc outer ring, and to search the zone that present optical read head focuses on be the recorded data zone;
After this optical read head moved a Preset Time by the disc outer ring towards inner ring, start the line data decoding of going forward side by side of orbit determination control function and fail up to data decoding; And
The bug check sign indicating number block of last decoding success of mpeg system is provided, and then this mpeg system can be obtained the information and the file structure of broadcast according to the bug check sign indicating number block of last decoding success, plays the disc contents of the action that finishes.
3. the method for judgement disc pattern as claimed in claim 2 is characterized in that, the determination methods in aforementioned judgement recorded data zone comprises the following step:
The maximal value of aforementioned radio frequency integration kalman filter signal is deducted the one first total reflection critical value of the interval lower limit of a total reflection as radio frequency integration kalman filter signal, and the maximal value of this radio frequency integration kalman filter signal is added the one second total reflection critical value of the interval higher limit of a total reflection as this radio frequency integration kalman filter signal;
With this first total reflection critical value and this second total reflection critical value judgement interval value as the total reflection zone;
The minimum value of aforementioned radio frequency integration kalman filter signal is deducted between a high-reflection region lower limit as one first high reflection critical value of this radio frequency integration kalman filter signal, and the minimum value of this radio frequency integration kalman filter signal is added that higher limit is as one second high reflection critical value of this radio frequency integration kalman filter signal between a high-reflection region;
This first high reflection critical value and the second high reflection critical value are as the judgement interval value in high-reflection region territory; And
In the process that moves of optical read head, system takes a sample to this radio frequency integration kalman filter signal in real time, utilize the judgement interval value of aforementioned total reflection and the judgement interval value in high-reflection region territory, judge whether present optical read head focal position is the zone of recorded data;
Wherein, when radio frequency integration kalman filter signal falls within the judgement interval value in high-reflection region territory, represent that then the optical read head focal position is the zone of recorded data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610159918A CN101154413B (en) | 2006-09-27 | 2006-09-27 | Method for judging disc pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610159918A CN101154413B (en) | 2006-09-27 | 2006-09-27 | Method for judging disc pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101154413A CN101154413A (en) | 2008-04-02 |
| CN101154413B true CN101154413B (en) | 2010-05-19 |
Family
ID=39256014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610159918A Expired - Fee Related CN101154413B (en) | 2006-09-27 | 2006-09-27 | Method for judging disc pattern |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101154413B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366660A (en) * | 2000-04-21 | 2002-08-28 | 松下电器产业株式会社 | Optical disc drive and method for determining type thereof |
| CN1392554A (en) * | 2001-05-15 | 2003-01-22 | 三星电子株式会社 | Method for identifying optic disc type |
| CN1405756A (en) * | 1996-05-30 | 2003-03-26 | 株式会社日立制作所 | CD apparatus and method for identifying kind of CD |
| CN1519837A (en) * | 2003-01-20 | 2004-08-11 | 建兴电子科技股份有限公司 | Method for detecting kenel of optical disc sheet |
-
2006
- 2006-09-27 CN CN200610159918A patent/CN101154413B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405756A (en) * | 1996-05-30 | 2003-03-26 | 株式会社日立制作所 | CD apparatus and method for identifying kind of CD |
| CN1366660A (en) * | 2000-04-21 | 2002-08-28 | 松下电器产业株式会社 | Optical disc drive and method for determining type thereof |
| CN1392554A (en) * | 2001-05-15 | 2003-01-22 | 三星电子株式会社 | Method for identifying optic disc type |
| CN1519837A (en) * | 2003-01-20 | 2004-08-11 | 建兴电子科技股份有限公司 | Method for detecting kenel of optical disc sheet |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-351315A 2001.12.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101154413A (en) | 2008-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1103975B1 (en) | CD player | |
| RU2488177C2 (en) | Information storage medium and method, and system of data recording on it | |
| US20090290463A1 (en) | Optical disc device | |
| US5974009A (en) | Focus control device and method for use in multilayer optical disk reproduction system | |
| US7512046B2 (en) | Optical disk apparatus and method for controlling the same | |
| US6556302B2 (en) | Apparatus for and method of determining information record medium | |
| US20080239902A1 (en) | Information recording apparatus and information recording method | |
| CN101154413B (en) | Method for judging disc pattern | |
| JP4342930B2 (en) | Optical disc apparatus, control method therefor, and recording medium | |
| CN100397489C (en) | Reproducing and/or recording apparatus and method determining whether sessions are open for a medium for reproduction and/or recording | |
| US7719941B2 (en) | Method for identifying recording contents of an optical disk | |
| US20050249060A1 (en) | Optical disk reading apparatus | |
| EP1209679A2 (en) | Recording apparatus and method for optical recording medium | |
| KR100833878B1 (en) | Session recognizing method of multi session disc | |
| KR100662592B1 (en) | Optical disk apparatus and control method | |
| US20080205230A1 (en) | Speed-Down During Linking | |
| JP3300807B2 (en) | Optical information recording device and optical information recording method | |
| JPH11328684A (en) | Method for determining kind of optical disc and optical disc device | |
| KR100272377B1 (en) | Data reproducing method of a recording type disc | |
| CN101377931A (en) | Data writable address locating methods and optical recording apparatus | |
| JP2000298830A (en) | Method for detecting defect and processing recording and recording/reproducing apparatus using the same | |
| US20030063537A1 (en) | Disk reproducer | |
| JP2005332494A (en) | Recording processing method, optical disk device, program and recording medium | |
| KR20020095856A (en) | Method for controlling data reading speed in an optical disk reader/writer | |
| KR20010040924A (en) | Multitrack disk player and method of read error recovery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20170927 |