CN100383884C

CN100383884C - Method for detecting optical disc error messages

Info

Publication number: CN100383884C
Application number: CNB2004100459042A
Authority: CN
Inventors: 王俊程
Original assignee: Lite On IT Corp
Current assignee: Lite On IT Corp
Priority date: 2004-05-24
Filing date: 2004-05-24
Publication date: 2008-04-23
Anticipated expiration: 2024-05-24
Also published as: CN1702762A

Abstract

The present invention relates to a method for detecting the error information of optical discs, which is used for an optical drive. Firstly, whether the optical disc is blank or not is detected, if not, execute the following steps that whether seeking errors exist or not is checked, if yes, a seeking error mark is recorded; when a data zone is read, data error information which comprises an error number and data error positions corresponding to the error number; finally, the error information of optical discs is output according to the data error information and the seeking error mark.

Description

Detect the method for CD error message

Technical field

The present invention relates to a kind of method that detects error message, and be particularly related to a kind of method that detects the CD error message.

Background technology

Cd-recorder is more and more universal now, and the user is backup file, photo, audio or video data or the like easily.Cd-recorder for example is CD-R/RW, DVD+R/RW, DVD-R/RW, DVD dual and DVD-RAM or the like a different specification, and the user carries out burning according to employed cd-recorder with the CD of relevant specification.

When carrying out burning, be with different power CD to be launched laser, with the position of record 1 or 0 in CD by the optical read head in the CD writers.Because in the burning process, CD is fast turn-around, and the dyestuff on the CD also differs and establishes a capital very evenly, stable, and the situation that therefore has the burning data mistake unavoidably takes place.

With regard to CD, the error in data on the CD can be divided into two kinds of C1 and C2: C1 is meant the error in data that can correct by algorithm, and C2 is meant the mistake that can't retrieve.Therefore the C1 error in data does not influence the correctness of burning, and the C2 error in data will destroy the correctness of optical disc data.

With regard to DVD, the error in data on the CD can be divided into two kinds of PI and PO: PI is meant the error in data that can correct by algorithm, and PO is meant the mistake that can't retrieve.Therefore the PI error in data does not influence the correctness of burning, and the PO error in data will destroy the correctness of optical disc data.

Yet general user also can't correctly learn the quality of CD, also can't learn the quality of the CD after the burning, because whether the user can only can read smoothly from CD judges, and can't learn the incidence of C1, C2, P1 or P2 type error in data.

Summary of the invention

In view of this, purpose of the present invention is exactly that a kind of method that detects the CD error message is being provided.

According to purpose of the present invention, a kind of method that detects the CD error message is proposed, be used for a CD-ROM drive.At first, whether be blank, then carry out following steps if not if detecting CD.Check whether seek error is arranged, if then write down a seek error mark.When reading a data field, calculate an error in data information, error in data information comprises a number of errors and a corresponding error in data position.At last, according to error in data information and seek error mark and export the CD error message.

According to another object of the present invention, a kind of method that determines the preferable inclination angle of optical read head is proposed.At first, determine a plurality of inclination angles, wherein these inclination angles are inequality.Then, read a CD with these inclination angles respectively, and produce corresponding a plurality of CD error messages.At last, determine preferable inclination angle according to these CD error messages.

For the present invention's above-mentioned purpose, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.

Description of drawings

Fig. 1 shows the method flow diagram that detects the CD error message that burning finishes according to a preferred embodiment of the present invention a kind of.

Fig. 2 A is a method flow diagram of using the inclination angle of this detection error message method decision optical read head.

Fig. 2 B is the error message of drawing according to the sample that write down and the graph of a relation at inclination angle.

Fig. 3 is the process flow diagram that detects the error in address information approach of blank CD.

Embodiment

Blank CD need detect its error in address information understanding its quality of dispatching from the factory, and the CD that burning finishes also can detect its error in data information and learn the collocation situation of CD, CD writers.

Please refer to Fig. 1, it shows the method flow diagram that detects the CD error message that burning finishes according to a preferred embodiment of the present invention a kind of.The data that method read of present embodiment only need be used for learning whether error in data is arranged, and need not pass through the process of data decoding, so speed is very fast.At first, make the CD entry into service, and optical read head is moved to outer rail by interior rail, shown in step 110.

Then, whether have seek error (seek error) take place, shown in step 120 if checking.Zonal stained as if having on the CD, large stretch of Mike's blacking is for example arranged or serious scratch is arranged, then have the mistake that can not find track and take place.Therefore if seek error is arranged, then this district of mark is for error-zone, shown in step 130.

Then, judge whether the zone that present laser is focused is the data field, shown in step 140.Except the data field, for example be the non-data fields such as (gap), interval between importing/leading-out zone (lead in/out), track in addition on the CD, when laser during, can think to have many error in data by mistake in this a little non-data field.Therefore if the number of the error in data that just need be detected when the data field adds up, shown in step 160, carry out otherwise jump to step 160.

Whether decision detects end in step 160 then, and if not, then execution in step 110 continues to detect CD.Present embodiment not necessarily will detect the error message of full wafer CD, also can only detect a certain zone of CD, and for example general CD is unstable at the dyestuff of outermost, and therefore the easiest generation error in data can only detect at the periphery.

Execute the detection method of this enforcement, the user can obtain the error in data information of this CD in each position, at the CD sheet, is exactly C1 and the C2 error message in each position, at the DVD sheet, is exactly the error message in each position of PI and PO.User and can know the position of the error-zone of this film.Can judge the quality of CD or CD writers according to these information users, and whether CD matches with CD writers.

Can be applied to determine the inclination angle (tiltangle) of optical read head on the detection method of present embodiment in addition.The read head of DVD drive is to finely tune its angle, in the hope of better read-write quality.Be to determine best inclination angle with the mode of observation of use instrument before general CD-ROM drive dispatches from the factory, but practice elasticity like this is not enough, and expends the cost of instrument and manpower with personnel.

Fig. 2 A is a method flow diagram of using the inclination angle of this detection error message method decision optical read head.At first, set an inclination angle earlier, shown in step 210.Then, detect the error message of reading CD with detection method shown in Figure 1, shown in step 220 with this inclination angle.Then write down this inclination angle sample of error message therewith, shown in step 230.

Then, whether have enough sample, shown in step 240, then get back to step 210 if not if checking, if execution in step 250 then.Required sample number can determine according to required degree of accuracy, for example is that 10 samples can be arranged, and just execution in step 210-230 is ten times.

At last, decide preferable inclination angle according to the sample that is write down, shown in step 250.Please refer to Fig. 2 B, it is the error message of drawing according to the sample that write down and the graph of a relation at inclination angle.Can find when the A of inclination angle minimum error message is arranged thus in the graph of a relation, being greater than or less than the inclination angle all can have bigger error message, therefore can determine with inclination angle A as preferable inclination angle.

CD-ROM drive before this inclination angle determining method can be used in and dispatch from the factory is set, and needs manpower and instrument to proofread and correct in order to avoid remove in the past, and directly decides and set the inclination angle by the program in the firmware, to accelerate to set required time.In this used, during execution in step 220, certain a part of error message that can only detect CD got final product, and need not detect the full wafer CD, with the quickening detection speed, and also for holding suitable accuracy.

This inclination angle determining method also can inclination angle adjustment when CD player operates, so that CD-ROM drive can be in response to CD or environment of operation and the preferable quality that reads is arranged.For example be when CD one is put CD-ROM drive into and carry out the inclination angle adjustment, or do to adjust timely.

Fig. 3 is the process flow diagram that detects the error in address information approach of blank CD.At first, make the CD entry into service, and optical read head is moved to read CD, shown in step 310 to outer rail by interior rail.Then, check whether error in address is arranged, shown in step 320, if having, then calculated address number of errors, shown in step 330, otherwise, enter step 340.In step 340, check whether to detect end, for example whether detected the complete slice CD, if not, then get back to step 310, if execution in step 350 then.In step 350, OPADD error message, and method ends.

The disclosed error message detection method of the above embodiment of the present invention can detect blank and non-blank-white sheet, and more can adjust the inclination angle of the optical read head of CD-ROM drive according to this.

In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking the accompanying Claim book person of defining.

Claims

1. a method that detects the CD error message is used for a CD-ROM drive, and this method comprises:

Whether be blank, if not, then carry out following steps if detecting this CD:

Check whether seek error is arranged, if then write down a seek error mark;

When reading a data field, calculate an error in data information, this error in data information comprises a number of errors and a corresponding error in data position; And

According to this error in data information and this seek error mark and export this CD error message.

2. whether be in the blank step the method for claim 1, wherein detecting, if then carry out following steps:

Whether check has error in address, if, then write down an error in address information, comprise an error in address number and a corresponding error in address position; And

Export this CD error message according to this error in address information.

3. a method that detects the CD error message is used for a CD-ROM drive, and this method comprises:

Whether be blank, if not, then carry out following steps if detecting this CD:

Determine a plurality of inclination angles, wherein these inclination angles are different; And

Read a CD with these inclination angles respectively, and produce corresponding a plurality of CD error messages;

Wherein, the step that produces the CD error message that each should correspondence comprises:

Check whether seek error is arranged, if then write down a seek error mark;

According to this error in data information and this seek error mark and export this corresponding CD error message.

4. method as claimed in claim 3 comprises that also one determines the step at the preferable inclination angle of optical read head, wherein:

In these corresponding CD error messages, select inclination angle with minimum CD error message person and correspondence thereof; And

Determine that this inclination angle is preferable inclination angle.

5. method as claimed in claim 3 wherein, is detecting whether this CD is in the step of blank, if then carry out following steps:

Export this CD error message according to this error in address information.