CN100578637C

CN100578637C - Recording control method

Info

Publication number: CN100578637C
Application number: CN200510118131A
Authority: CN
Inventors: 朱斯廉
Original assignee: Via Technologies Inc
Current assignee: Via Technologies Inc
Priority date: 2005-10-20
Filing date: 2005-10-20
Publication date: 2010-01-06
Anticipated expiration: 2025-10-20
Also published as: CN1783283A

Abstract

The recording control method is for controlling the read/write head for whether to record data onto the CD. The recording control method includes the following steps: detecting the change of the amplitude of the state signal; and if the amplitude of the state signal is detected to have change and the RF level signal has amplitude change within specific range in certain time, judging as system vibration and sending out record interruption signal.

Description

Record control method

Technical field

The present invention is relevant for a kind of CD-ROM drive control method; Especially refer at CD-ROM drive in the control method aspect the writing function.

Background technology

Because the arriving in digitized information epoch, also grow with each passing day the deposited demand of the memory capacity that the floppy disk (floppy disk) that generally is used in early days can provide for the demand of portable digital medium with high power capacity.Therefore, the optic storage medium and the memory storage of characteristic such as have high storage capacity, be easy to carry just promptly are widely used, as CD-ROM drive (CD-ROM drive), logging machine (CD-R drive, DVD-R driver) and LD (Laser Disc) player etc.

In described optic storage medium, numerical data all is to be recorded on the discoid CD (Optical Disk), the track bar (InformationTrack) that has into the form concentric spirals shape on this kind CD, numerical data promptly utilize on track bar and to form the section record in addition with different optical contrast (OpticalContrast) character.On track bar, read or when writing data, CD-ROM drive or logging machine can rotate CD, and utilize the lens (lens) of optical read/write head (pick up head) on track bar, to throw and absorb light beam (light beam) and carry out reading or writing of data.

At recording light medium (optical storage medium), such as CD (compact disk, CD), erasable optical disk (CD-RW), Video CD (digital versatile disk, DVD), erasable Video CD (DVD-RW, DVD+RW, DVD-RAM) and super sound CD (superaudio compact disk, SACD) time, if when the CD-ROM drive that writes down is collided or is shaken, optical sensor in the CD-ROM drive can detect the track bar relative position deviation on read/write head and the CD, and then produce tracking error signal (Tracking Error, TE) or focus error signal (Focus Error, FE).In general, tracking error signal is to come from rocking of CD driver horizontal, and focus error signal is rocking from vertical (up and down).Record other track bar when rocking, cause bad rail of CD, this moment, CD-ROM drive can charged timeout.

But when on the blank CD of desire record during defectiveness (defect), can produce tracking error signal or focus error signal equally, therefore cause judging by accident the situation that the CD-ROM drive platform vibrates (shock), even thereby temporarily stop record.In fact, there is slight imperfections still to continue record on the CD and do not influence the record result.But, then can prolong the time that record data spend if because of compact disc defect stops record.

Summary of the invention

For the shake of distinguishing focus error signal and/or tracking error signal is from system vibration or compact disc defect, the present invention proposes effectively to distinguish the method for its difference.

The present invention proposes a kind of record control method, in order to control a read/write head whether with data recording on a dish, comprising: whether the amplitude that detects a status signal changes; When the amplitude that detects described status signal changes, in a special time,, then be judged as a system vibration, and send a record look-at-me if radio frequency level signal amplitude in described special time changes scope less than a particular range; And change scope more than or equal to described particular range when described radio frequency level signal amplitude in described special time, the amplitude of then judging described status signal is changed into described disc defect and is caused, and do not send the record look-at-me, wherein detect the step whether amplitude of described status signal change and be meant whether the amplitude that detects a tracking error signal or a focus error signal changes.

The present invention also proposes a kind of record control method, in order to control a read/write head whether with data recording on a dish, comprising: whether the amplitude that detects a status signal changes; And when the amplitude that detects described status signal changes, in a special time, if radio frequency level signal amplitude in described special time changes scope greater than a particular range, then be judged as compact disc defect, and the continuation record wherein detects the step whether amplitude of described status signal change and is meant whether the amplitude that detects a tracking error signal or a focus error signal changes.

In one embodiment of this invention, described status signal can be focus error signal or is tracking error signal.When the amplitude of described focus error signal or tracking error signal greater than more than 0.1 volt the time, whether the amplitude of observing described radio frequency level signal in the special time also changes more than or equal to more than 1 volt.If the amplitude of described radio frequency level signal changes more than or equal to more than 1 volt, then be judged as system vibration, and send a record look-at-me.

For described purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows:

Description of drawings

Fig. 1 represents the synoptic diagram according to the logging machine control system of the embodiment of the invention.

Fig. 2 represents the relativeness synoptic diagram of CD and radio frequency level signal.

Fig. 3 represents the configuration schematic diagram of inner main light beam of sensor devices and less important light beam.

When Fig. 4 a represents that the record board vibrates under the logging mode, the sequential chart of focusing/tracking error signal and radio frequency level signal.

When Fig. 4 b represents under the logging mode CD defectiveness, the sequential chart of focusing/tracking error signal and radio frequency level signal.

Fig. 5 represents the process flow diagram according to the record control method of the embodiment of the invention.

Symbol description:

The synoptic diagram of 10～logging machine control system; 11～CD; 13～read/write head; 131～optical sensor; 15～micro actuator; TE～tracking error signal; FE～focus error signal; 17～radio circuit; RF LvL～radio frequency level signal 19～controller; A, B, C, D, E, F, G, H～sensor devices

Embodiment

Fig. 1 represents the synoptic diagram according to the logging machine control system 10 of the embodiment of the invention.CD 11 has a plurality of spiral helicine data-tracks.The laser that the signal judgement read/write head 13 that micro actuator 15 is passed back according to the optical sensor 131 of read/write head 13 is sent and the position deviation amount at track bar center, and generation tracking error signal (Tracking Error Signal, TE) and focus error signal (Focus ErrorSignal, FE).Radio circuit 17 also produces a radio frequency level signal RF LvL according to the output of optical sensor 131, and this radio frequency level signal is reached controller 19.

Optical sensor is converted to the radio frequency level signal through radio frequency amplifier after receiving the reflection ray of CD.Fig. 2 represents the relativeness synoptic diagram of CD and radio frequency level signal.If CD is under the normal flawless situation, this radio frequency level signal can be kept a high level (H).But when the read/write head read/write to a defective (defect) when zone, because CD can't regular reflection laser, so the radio frequency level voltage of signals can drop to low level (L).The voltage of high-low level can be tried to achieve according to experiment, or determines according to predeterminated voltage.

The radio frequency level signal can be from main light beam of the sensor devices of optical sensor 131 (main beam) or less important light beam (side beam).Fig. 3 represents the configuration schematic diagram of inner mainly light beam of the sensor devices in the optical sensor and less important light beam.The reflection ray that is received by four sensor devices such as A, B, C, D is called main light beam, and the reflection ray that is received by four sensor devices such as E, F, G, H then is called less important light beam.In the present embodiment, send into radio circuit 17 to produce the radio frequency level signal with the intensity summation of less important light beam.In other embodiments, also can send into radio circuit, to produce the radio frequency level signal according to the summation of main beam intensity.

In addition, the summation of the reflection ray intensity that micro actuator can receive according to A, C two sensor devices produces focus error signal, and the summation of the reflection ray intensity that receives according to B, C two sensor devices produces tracking error signal.

When Fig. 4 a represents that the record board vibrates under the logging mode, the sequential chart of focusing/tracking error signal and radio frequency level signal.When register system 10 vibrations (shock), cause the level of focusing error or tracking error signal to be offset up and down more than 0.1 volt.Because the radio frequency level signal is the summation of reflection ray, so can not change level along with the vibration of record board.The fluctuation that controller 19 is judged focusing this time or tracking error signal according to the radio frequency level signal is from the vibration of record board, thus send record interruption pulse signal, with notice read/write head charged timeout.Because record board when vibration, read/write head may write data other track bar, causes this CD can't read herein, thus must be when the record board vibrates charged timeout.In the present embodiment, when focusing/tracking error signal changed level, the level change that controller promptly detects radio frequency level signal in this 50 microsecond (us) had or not above 1 volt.If do not have, then controller is judged as control system 10 vibrations.Data that it should be noted that the displacement, detection time etc. of described focusing error or tracking error signal do not limit the scope that present embodiment is put forward, and its numerical value can be adjusted with each system's execution environment is different.

When Fig. 4 b represents under the logging mode CD defectiveness, the sequential chart of focusing/tracking error signal and radio frequency level signal.When defectives such as, fingerprint water stain when having on the CD, paster caused the level of focusing error or tracking error signal to be offset more than 0.1 volt up and down, the level of radio frequency level signal also and then descended.Controller 19 goes out this time to focus on or the fluctuation of tracking error signal is from compact disc defect according to the electrical level judging of radiofrequency signal, so do not send record interruption pulse signal, makes read/write head continuation record.In the present embodiment, when focusing/tracking error signal changed level, the level change that controller promptly detects radio frequency level signal in 50 microseconds (us) had or not above 1 volt.If have, then controller is judged as compact disc defect.Same, the data of the displacement of described focusing or tracking error signal, detection time etc. do not limit the scope that present embodiment is put forward, and its numerical value can be adjusted with each system's execution environment is different.Owing to can be as the criterion according to the level of focusing error or tracking error signal and the level of radiofrequency signal in the present embodiment, be vibration or disc defect so can judge the present situation of system.

Fig. 5 represents the process flow diagram according to the record control method of the embodiment of the invention.At first in step S501, whether the detection record status signal changes.In the present embodiment, come as the recording status signal with focus error signal or tracking error signal.When the detection record status signal changed, the CD defectiveness of vibration or desire record took place in expression system's this moment.Whether among 50uss have change, as step S502 if observing the radio frequency level signal immediately.In the present embodiment, the radio frequency level signal can be main light beam or the less important light beam that sensor devices receives.

If in step S502, the radio frequency level signal has change at 50us, then enters into step S503.The fluctuation of judging focus error signal or tracking error signal in the step is caused by compact disc defect, so make optical read/write head continue record.

If in step S502, the radio frequency level signal does not have change in 50us, then enter into step S504.Step S504 judges that the fluctuation of focus error signal or tracking error signal is to come from system vibration, then send record interruption pulse signal, and make the system halt record.

In the present invention, can judge the origin cause of formation of focusing/error tracking signal vibration.If system vibration, but charged timeout then; If during compact disc defect,,, write down required time to shorten so when defective was little, system and method provided by the invention can make register system continue record because this moment, charged timeout can not be improved the defective fact on the CD.Though record data may cause data to damage in a way in defective dish, slight data damage can be refilled the data of disappearance by the error correction code processor of rear end.

Though the present invention with preferred embodiment openly as above; right its is not that any those skilled in the art are under the situation that does not break away from the spirit and scope of the present invention in order to qualification the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.

Claims

1. record control method, in order to control a read/write head whether with data recording on a dish, comprising:

Whether the amplitude that detects a status signal changes;

When the amplitude that detects described status signal changes, in a special time,, then be judged as a system vibration, and send a record look-at-me if radio frequency level signal amplitude in described special time changes scope less than a particular range; And

When described radio frequency level signal amplitude in described special time changes scope more than or equal to described particular range, the amplitude of then judging described status signal is changed into described disc defect and is caused, and does not send the record look-at-me,

Wherein detect the step whether amplitude of described status signal change and be meant whether the amplitude that detects a tracking error signal or a focus error signal changes.

2. record control method as claimed in claim 1, the step representative of wherein sending described record look-at-me judge that the amplitude of described status signal changes into a system vibration and cause, and according to described record look-at-me charged timeout.

3. record control method as claimed in claim 1 then continues record if be judged as disc defect.

4. record control method as claimed in claim 1, wherein when described tracking error signal amplitude changed less than described particular range, the amplitude that then is considered as described tracking error signal did not change.

5. record control method as claimed in claim 4, wherein said particular range are 0.1 volt.

6. record control method, in order to control a read/write head whether with data recording on a dish, comprising:

Whether the amplitude that detects a status signal changes; And

When the amplitude that detects described status signal changes, in a special time, if radio frequency level signal amplitude in described special time changes scope greater than a particular range, then be judged as compact disc defect, and continue record,

7. record control method as claimed in claim 6, wherein said particular range are 1 volt.

8. record control method as claimed in claim 6, wherein said radio frequency level signal is produced by the main light beam that the sensor devices of described read/write head receives.

9. record control method as claimed in claim 6, wherein said radio frequency level signal is produced by the less important light beam that the sensor devices of described read/write head receives.