CN1517991A

CN1517991A - Recognizing method and device of optical recording medium with high density/normal density recording kind

Info

Publication number: CN1517991A
Application number: CNA031149510A
Authority: CN
Inventors: 金喜英
Original assignee: Shanghai LG Electronics Co Ltd
Current assignee: Shanghai LG Electronics Co Ltd
Priority date: 2003-01-17
Filing date: 2003-01-17
Publication date: 2004-08-04

Abstract

A method and device for recognizing if an optical record medium has high-density records or low-density records features that for the high-density record mode, the SW signal 11T or 14T are recorded on the most internal track which is a record density indicating region. If the 11T or 14T signal is reproduced, the medium has a high-density mode.

Description

The method of discrimination and the device of optical recording media high density/normal density record kind

(1) technical field

The present invention relates to the method for discrimination and the device of a kind of optical recording media high density/normal density record kind, refer in particular to when utilizing similar CD to carry out low-density record or high density recording, differentiation is high-density optical disk or a kind of method and the device thereof of low-density recording disk.

(2) background technology

The CD-R/RW driver is to be connected products such as PC, is the device of object reading of data or storage with its CD-R/RW.This CD driver generally can playback record at the CD of CD series (CD-ROM, the CD-AUDIO) data on, and can be, CD-RW identifying recording layer at cd cd-R.Particularly, though on CD-R, can only write down repeatedly record data that can be repeatedly on CD-RW 1 time.Because each CD is observed the standard format of CD series by Red Book (redbook), the formative regulation of definition such as yellow book (yellowbook) is so have CD-ROM drive, CD-R driver, the compatibility that the CD-RW driver all can be read.

About CD-R, the specification of CD-RW, orange paper (orangebook) has regulation.Because CD-R/RW has favorable compatibility and high recording capacity for CD-ROM drive, CD-R/RW is becoming PC general data memory storage, particularly CD-RW and more is being subjected to attracting attention of user because have recording characteristic again.CD-R, the CD-RW CD can be along with these surface recording data during data recording along with the surface of recording track is formed with the groove of randgroove form.

Special use is read CD and is different from and can writes down CD, can not with write down at first or again record be recorded when (overwrite) can not be used as tracking servo, focus on (focus) servo-drive system, the information of constant linear velocity CLV (ConstantLinear Velocity) servo-drive system.

Storing absolute location information and several optical disc information of ATIP (Absoulte Time In Pre-groove) on the groove of above-mentioned randgroove form with the physical property coding method that is called swing (wobble).

Utilize this ATIP to realize servo-drive system control, the address that positional information is used as absolute position and the actual sector that is recorded is recorded jointly.That is,, use the ATIP address all can write down or reproduce data in any position so need only because the absolute position is fixed.

Data space on the CD can be regarded as and be continuous several continuous collections that are called as the structure of sector (Frame).The information of about 2048byte can be stored in a sector.Its position can directly be found in each sector because of addressing.CD system is used and is called as MSF (Min, Sec, addressing method Frame).1 second is 75 sectors (Frame), and 1 minute is 60 seconds.That is, 1Frame represents a sector.The zone of storing self address information is arranged in the sector, and this zone is referred to as SUB-Q.At CD-R, during the CD-RW system log (SYSLOG), the address that is recorded in MSF in the above-mentioned SUB-Q is consistent with its locational ATIP address.The data space that several sectors are formed is divided into the boot section again, planning region, several zones such as leadout.At CD-R and first guiding front end of CD-RW system zones such as PMA, PCA are arranged again.

Because of above-mentioned guidance field belongs to the zone of planning front end, have the data structure that is referred to as TOC here, this TOC has the trace information that is recorded in the planning zone again, takes this as a foundation to lean out the position that is recorded in the track in the planning zone and finds it.

Above-mentioned planning zone is made up of more than one track zone as the significant data area of storing of reality.That is, can there be several tracks in the planning zone.At audio frequency (audio) CD generally is that a first song is stored in the track.

Above-mentioned leadout zone is the preparation zone in the planning outside.

Above-mentioned guidance field, the planning zone, the leadout zone is called the session phase (Session) altogether.A CD can form the several sessions phase (Session), is called the multiple session phase (multisession).

The planning of first session phase (Session) zone reference position be physics qualitatively.The MSF address later data space of 0:0:0 is to increase by 1 form addressing successively, and front end area is to reduce by 1 form addressing successively toward first channeling direction.The FA final address of first guiding is generally 99:59:74.

Above-mentioned PMA zone only is present in the CD system that keeps a record.Because can be recorded as track unit to a session phase (Session) here, so be used as the trace information that storage is recorded.For example: after writing down a track, do not do the session phase (Session) and just extract CD out, will confirm the existence of track without any method so.Since this reason, and need PMA.All increase information when PMA zone, each recording track.This PMA enters storage track reference position and end position information.

The common recording method of CD is described as follows:

If the beginning of CD just allows other recording method, recording track at an arbitrary position just.If the reservation track, even its information can not record whole zone, also can be at next track record.The session phase (Session) is record at last.But for end session phase (Session), all tracks in the session phase (Session) should be recorded into, and imperfect track also should be a done state.The session phase (Session), record was to the positional information in the planning zone of next session phase (Session), so that find the next session phase (Session) rapidly in the guiding when finishing.If do not make the indicator to next session phase (Session), this Zhang Guangpan just becomes the CD that can not increase record more so.CD-RW be because record again though the whole tracks that write down can be write down (overwrite) again, can not change course length arbitrarily, so whole CD all will rewrite when writing down again.

CD as mentioned above, CD-ROM, the success of quilts such as CD-V become audio frequency (audio), the medium of MPEG video (video) and other many data messages.But the memory capacity of 680Mbytes degree but is not enough to become with the computer applications of center picture and the medium of high image quality data video (video) software.Can regard that the DVD that CD series is extended is that memory capacity is than the high optical recording media of new generation more than 7 times of general CD as.The increase of memory capacity is improved by the raising of light source and thing lens matter basically.Meanwhile, the record coding that uses more powerful RS-PC and the be referred to as EFM plus logical form that redesigns CD has fully also played certain effect as the increase of DVD memory capacity.

Utilize RS-PC like this, ECC and 8/16 frequency modulation sign indicating number can write down the more capacity of encoding than original CD when the onesize data of CD-R/RW recording medium.Utilize this point, can improve recording density at original optical recording media (similar CD), the EFM plus coding that the use code efficiency is good carries out the high density recording more than 2 times.That is, support the driver of CD-R/RW system and high density CD-R/RW system just to be equivalent to this class simultaneously.So when similar CD carries out normal density record or high density recording, need differentiate the device that the normal recordings CD still is a high-density optical disk.

Method of discrimination to different classes of CD was arranged in the past.For different classes of CD, utilize according to different high frequency signalization of CD or different reflectivity and distinguish.

But when utilizing similar CD to carry out foregoing normal density record or high density recording, can't distinguish when reproducing its recording density with the high-frequency signal of CD or reflectivity.This is because the high-frequency signal or the reflectivity of similar CD are equal.

(3) summary of the invention

When the objective of the invention is to make similar CD to carry out low-density record or high density recording, can differentiate is high-density optical disk or a kind of method of low-density recording disk.

The object of the present invention is achieved like this:

The method of discrimination of a kind of high density of optical recording media/normal density kind comprises:

Ad-hoc location at optical recording media adds the step that the zone is represented in high density recording;

When reproducing data, described optical recording media represents that according to whether detecting described high density recording the zone differentiates the step that high-density recording medium still is a normal density recording medium.

The present invention is that a kind of high density at existing C D-R/RW CD adding demonstrated record high density data is represented the zone as the high-density recording recording method of optical recording media.

The present invention represents the zone to add high density at a CD with high density and low-density method for recording data and when carrying out high density recording for this reason on CD.

The present invention to be utilizing RS-PC, ECC and 8/16 frequency modulation sign indicating number or have the frequency modulation sign indicating number of encoding rate similar with it, and the high density that adds in interior week at CD when the CD-R/RW CD carries out the high density recording of user data is represented the zone.

The present invention is as the high-density recording recording method of optical recording media, be a kind of when the low-density data record method with original CD recording method, in CD, add high density during high density data record and represent the zone.

The present invention guarantees to be that high density is represented the zone to the no zone of CD-R/RW CD specification during with high density recording, at respective regions record special sign.

When reproducing data with optical recording media, the present invention represents that because of detecting above-specified high density the zone determines normal density recording disk or high-density optical disk.

Differentiating the result according to it when detecting above-specified high density and represent that the zone determines normal density recording disk or high-density optical disk when the present invention reproduces data with optical recording media carries out suitable optical disc replay and controls.

Effect of the present invention:

The invention provides and utilize original CD-R/RW optical recording media, differentiate the method for optical recording media kind during with high density (2 times of capacity) record data, particularly provide when carrying out high density recording and represented the mode in zone to add high density recording in interior week of light CD, when similar CD carried out normal density or high density data record and reproduces, determining respective media easily was the high-density optical disk or the method for normal density recording disk.

In addition, the present invention is because carry out optical disc replay on same smooth optical disc drive system, represent that the zone just carries out the control of its corresponding servo-drive system if detect high density, if will carry out its corresponding servo-drive system control during the normal density recording disk equally, so on similar CD, can reproduce the CD of high density or normal density record.

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

(4) description of drawings

Fig. 1 is the figure of diagram middle-high density record of the present invention expression regional signal one embodiment.

Fig. 2 a, b are the figure of diagram CD-R/RW structure.

Fig. 3 a, b are when meeting the normal density record in CD-R/RW and the recording disk structure of high density recording is implemented illustration.

Fig. 4 is diagram is differentiated process according to optical recording media kind of the present invention figure.

Fig. 5 is the figure of diagram according to opitical recording reconstruction device structure of the present invention.

(5) embodiment

Fig. 1 is for illustrating that high density recording of the present invention represents the diagram of signal in the zone.As previously mentioned, carry out high density recording for similar cd-rom using EFM plus coding etc., with belong to high density represent the zone, the guiding start time (Ts1) that is illustrated on the CD is as the criterion, and represents that to the mode of using repeatedly record maximum sign length (Maximum Mark.Length) 11T or 14T the 30 ATIP Frame its medium are high density recordings from Ts1-00:35:65 ATIP (Min:Sec:Frame).Biao Shi high density represents that zone detection because of certain interval short-wave signal (channel frequency) when response light media representation data is revealed like this.For example: above-specified high density represents that the zone is added in the interior week of CD, interior all high density recordings of CD represent that the zone can detect short wavelength's signal as shown in Figure 1 in certain interval during reproduction, at this moment this respective media can be differentiated to be high-density optical disk.

This high density represents that the zone is the obsolete zone of CD-R/RW CD specification, so this position is the position of detecting when writing down with normal density less than the RF waveform.

Fig. 2 a, b are the structural drawing of CD-R/RW CD.Demonstrate interior all PCA TEST, PCA COUNT, PMA, LEAD-IN, the residing positional structure of PROGRAM AREA from CD.The obsolete here position of the present invention, the high density that adds in interior week of CD is represented the zone.

Fig. 3 a shows the recording information structure of the CD that above-mentioned Fig. 2 occurs, and utilizes obsolete zone adding of interior week of CD high density to represent that the method in zone shows at Fig. 3 b.Fig. 3 a has shown the structure and the obsolete regional PCA TEST of normal density recording disk, and PCA COUNT, PCA, LEAD-IN, PRO GRAM etc. be the zone separately.Fig. 3 b shows the structure of high-density optical disk and carries out high density recording in the obsolete zone of interior week of CD and represent and shown PCA TEST, PCA COUNT, RMA (Recording Management Area), LEAD-IN, PROGRAM AREA.High density represents that the zone is for guaranteeing the stability of servo-drive system at the interior Zhou Jilu of CD.

Shown in Fig. 3 b, high density according to the present invention represents that the zone is to be as the criterion from Ts1-00:35:65 ATIP (Min:Sec:Frame) to 30ATIP Frame interval with the guiding start time (Ts1) that is illustrated on the CD, by writing down maximum sign length (Maximum Mark Length) (being exemplified as 11T or 14T) repeatedly, represent that these medium are the methods that write down with the high density recording mode.Here the high density that provides is represented the method in zone, promptly, from Ts1-00:35:65 ATIP (Min:Sec:Frame) to 30ATIP Frame interval, method by record maximum sign length (Maximum Mark Length) (11T or 14T) repeatedly is wherein an example just, is not limited to this method.

So, add high density during high density recording and represent that the zone will can detect short wavelength's signal in certain interval when the response media representation as shown in Figure 1, detects short wavelength's signal (11T or 14T) and just can regard as high-density optical disk.

Fig. 4 shows according to optical disc judgment process of the present invention and CD drive control sequence.

Control sequence is:

Insert CD; Judge and have or not CD; The driving CD rotates; Read the CD-R/RW CD; Drive the servo-drive system device; Whether differentiate is high density compact disc; Above-mentioned differentiation, if not high density compact disc, PCA reads (CD-R/RW broadcast); Above-mentioned differentiation, if high density compact disc drives the high density servo system and device, the order of RMA guiding is carried out successively, RMA reads (playing high density CD-R/RW).

CD is inserted into CD drive, can shoot out judgement by the RF signal that produces because of the focusing hunting action and have or not CD.Insert if be judged as CD, just begin driving and make the CD rotation, at this moment judge CD-R (CD-R) or re-recordable optical disc (CD-RW) by the height of CD reflection rate.Drive the CD system servo-drive system device be suitable for above-mentioned differentiation CD then, utilize that to differentiate from the signal of the interior Zhou Zaixian of CD be high-density optical disk or low-density recording disk (normal density recording disk).This is differentiated as the front explanation, reads high density recording and represents that the zone checks (11T or the 14T) signal that whether detects the short wavelength.Be high-density optical disk if detect short wavelength's signal with regard to differentiating, detect less than being the normal density recording disk with regard to differentiation.

If the normal density recording disk just reproduces with the CD system reproducting method.That is, fulfiling the PCA vectoring phase reproduces and is recorded in the normal density optical disc data.If high density compact disc just drives the high density servo system and device, and fulfil the RMA vectoring phase and reproduce the data that are recorded in high density compact disc.

Fig. 5 shows according to the support CD-R/RW system of recording medium kind method of discrimination of the present invention and the planimetric map of the CD drive embodiment of high density CD-R/RW system, comprising:

Optical recording media is a CD 1; For driving the shaft generator 2 and the shaft generator driver 3 of CD rotation; Be the light picker 4 in CD 1 record data or reproduction data, above-mentioned light picker 4 comprises light picker 4a, LD driver 4b, I/V amplifier 4c; For driving the slip engine 5 of light picker 4; For driving driver 6 according to the focusing/tracking/slip when data reproduction or record on the smooth CD when moving; According to above-mentioned LD driver 4 is the record LD control part 7 of controlling recording LD power; The RF enlarging section 8 of RF signal Processing during for optical disc data reproduction or record; The coding of executive logging or reproduction data or the coder/decoder 9 of decoding; Main frame 10 for control overall optical disk drive; OPC/ROPC circuit 11 for the control and treatment luminous power; Differentiate and carry out the microcontroller 12 of servo-drive system control according to the medium kind of differentiating for the executive logging medium types; And the control that is subjected to above-mentioned microcontroller 12, digital servosystem processor 13 formations such as grade of carrying out servo-drive system control according to the kind of recording medium.

Be subjected to the control of main frame 10 when data recording or reproduction, carry out digital coding or decoding at coder/decoder 9, and handle the signal Processing and the processing of respective data record necessity by record LD control part 7 and RF enlarging section 8, reproducing signal 8 is handled and is decoded by coder/decoder 9 in the RF enlarging section.Record data or reproduce data be according to light picker 4 on CD 1 with suitable formatted record or reproduction, and pass through focusing/tracking/slide drive 6 according to microcontroller 12 by digital servosystem processor 13 and control light pickers 4, and make the rotation of light CD 1 constant speed by the driver 3 driving shaft engines 2 of shaft generator.

The control of differentiation high-density optical disk or low-density recording disk and servo-drive system thereof is born by microcontroller 12 when as mentioned above, reproducing data.That is, microcontroller 12 is received the interior all side reproducing signals of CD from RF amplifier 8, and in certain interval, detect short wavelength's signal 11T or 14T and be high-density optical disk with regard to differentiating, be the normal density recording disk otherwise just differentiate.Differentiate the result and will be communicated to digital servosystem processor 13 by microcontroller 12, CD-R/RW will reproduce (broadcast) servo-drive system if the normal density CD will form the PCA guiding, and CD-R/RW will reproduce (broadcast) servo-drive system if high density compact disc will form RMA guiding high density.

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

Claims

1, the method for discrimination of a kind of high density of optical recording media/normal density kind is characterized in that described method of discrimination comprises:

2, the method for discrimination of the high density of optical recording media as claimed in claim 1/normal density kind, it is characterized in that described high density recording represents that the zone is to detect short wavelength's signal with corresponding signal form record when reproducing data in certain interval, and when detecting short wavelength's signal of described record, it is high-density recording medium that described optical recording media is differentiated.

3, the method for discrimination of the high density of optical recording media as claimed in claim 1/normal density kind is characterized in that described high density recording represents that the zone is the interior week that joins described optical recording media.

4, the method for discrimination of the high density of optical recording media as claimed in claim 1/normal density kind, it is characterized in that described high density recording represents that the zone is to be as the criterion with the guiding start time for detecting short wavelength's signal in certain interval when reproducing data, by specifying the ATIP Frame time to write down maximum sign length repeatedly.

5, the method for discrimination of the high density of optical recording media as claimed in claim 4/normal density kind is characterized in that described high density recording represents that the signal in zone is with the length of described short wavelength's signal 11T or 14T record repeatedly.

6, the discriminating gear of a kind of high density of optical recording media/normal density kind is characterized in that described discriminating gear comprises:

Distribute high density to represent the zone in the optical recording media specific region, and represent the device of signal in this regional record high density;

Detection record is represented the device of regional signal in described high density;

Represent signal in order to detect described high density, differentiate and the data and the control device of the reproduction of execution respective media with high-density recording medium.

7, the discriminating gear of the high density of optical recording media as claimed in claim 6/normal density kind, it is characterized in that described high density represents signal joining described interior week of optical recording media, detect less than RF waveform position during the normal density record.

8, the discriminating gear of the high density of optical recording media as claimed in claim 6/normal density kind, it is characterized in that described high density represents that signal is to be as the criterion with the interior week guiding start time of described optical recording media, by ATIP Frame time of appointment with maximum sign length record repeatedly.