CN100449630C - Optical disc apparatus - Google Patents
Optical disc apparatus Download PDFInfo
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- CN100449630C CN100449630C CNB2005101203199A CN200510120319A CN100449630C CN 100449630 C CN100449630 C CN 100449630C CN B2005101203199 A CNB2005101203199 A CN B2005101203199A CN 200510120319 A CN200510120319 A CN 200510120319A CN 100449630 C CN100449630 C CN 100449630C
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Abstract
An optical disc apparatus includes a buffer memory for shared use between write data and read data. Upon receipt of a write command from an external host device, a system controller stores, in a buffer memory, write data attached to the write command, and, after storing the write data, supplies the write data to an optical pickup. When a read command is received after the receipt of the write command, execution of the write command is interrupted at a predetermined time, to store read data retrieved from the optical disc in a recorded area of the buffer memory. Further, a segment of the write data is recorded, and pre-read data retrieved from the optical disc is also stored in the area of the buffer memory, to improve a data hit rate.
Description
Technical field
The present invention relates to optical disc apparatus, particularly relate to the administrative skill of the memory buffer of the data of storage desire record and the data that desire is regenerated.
Background technology
In the optical disc apparatus that widely uses on the secondary storage device of computing machine, fixed magnetic-disk drives (HDD) or optical disc apparatus except the flexible disk set (FDD) can be realized at a high speed and the record regenerating of large-capacity data built-in micro computer.
Optical disc apparatus is because of the weight of optical head and optical head carriage anharmonic ratio HDD, and random-access response performance is always relatively poor.Thereby, when the optical disk device recording data, by the data of accepting with memory buffer to be followed from the data recording order that last rank device sends, finish receive the back at once upwards rank device report record be over, and improve the lip-deep data recording speed of seeing from this device.Just writing to CD when the data that general write order is followed can't receive when no dummy section in the memory buffer or after passing through the set time to reality from nearest write order.This generally is called " delay writes ", is known technology.Utilize the firmware of micro computer realize to postpone to write, the performance (response performance) of the optical disc apparatus of being seen by main device according to its disposal route greatly changes.
In addition, going up the write order that write order that the rank device sends exists general write order and additional " FUA bit " certainly.Become outside the object that postpones to write in the additional data that are the write order at the one's own department or unit of writing a Chinese character in simplified form of " Force Unit Access " is followed, a pair of memory buffer has stored the data of being received, the horse back record.The normal big data of being injured during mainly to records such as the catalogue data failure of the archives economy of OS of this order are added.
During fan sections such as DVD-RAM formative optical disk device recording data, after the write data of accepting to follow with memory buffer from the write order of this device (main device), in fact be not recorded in CD, finishing to main device report order when finishing the reception to memory buffer.That is, carrying out this delay writes.Begin record at the stored not record data of memory buffer according to following sequential to the reality of CD.
(1) writes in proper order
The continuous situation of logical address (LBA) of the write data that the write order that transmits continuously at autonomous device is followed is judged and is not followed the seeking the rail action of optical read-write head and record continuously, continues to receive till impact damper fills up (full state) to becoming.Becoming moment that impact damper fills up or beginning video disc recording (hereinafter referred to as " the real record ") beginning the moment that the no any order of autonomous device is transmitted in the set time from nearest write order.
(2) write at random
The logical address (LBA) of the write data that the write order that transmits continuously at autonomous device is followed is discontinuous situation, be judged as the discontinuous operation of recording of physical address on the CD of seeking rail action that needs optical read-write head, the counter of the number of the discontinuous data in presentation logic address is increased by one.Whenever discontinuous write data is come counter is increased by one, for example become the moment of 10 set value at counter, not that impact damper fills up and also begins real record (buffer capacity is diminished).This is that easily the state that makes main device wait for has autonomous easily device to export the possibility of time-out error because to seek rail action be very time-consuming processing.Certainly, and write equally in proper order, counter is less than set value, also if from nearest order through given time, begin real record.
In addition, at patent documentation 1 as shown below, the method for utilizing of memory buffer is disclosed.
[patent documentation 1] TOHKEMY 2000-339856 communique
Summary of the invention
In the past in above-mentioned (1), any situation of (2), all in case when real record to CD takes place, till all write down the interior not record data of memory buffer, independently install read/write command and also come and can't respond at once.
As noted above, in situation about writing at random, by utilizing discontinuous counter that restriction is set, buffer capacity is diminished on virtual, can prevent overtime to main device., in situation about writing in proper order, because of maximum limit ground uses the capacity of memory buffer, though can expect originally to write at a high speed, record execution time increase suddenly when handling is replaced in generation, and response performance worsens rapidly.The capacity of deterioration of this response performance and buffering storer is directly proportional, and in the poorest situation, main device is judged overtime, and autonomous device carries out bus reset.Specially make the capacity of memory buffer become big, also handle, become minus effect on the contrary because of taking place to replace in order to improve response performance.Bus reset mean autonomous device interruption logging, the user might be impaired to the reliability of optical disc apparatus.
The object of the present invention is to provide the high optical disc apparatus of reliability, increase memory buffer also not independently device suffer overtime.
In order to the basic fundamental thought that solves above-mentioned problem textural, residual not record data in memory buffer also if come from the read command of this device, can interrupt writing action in the suitable moment, can carry out the processing of read command.At this, the interruption of writing in the action means, radially finely tune and activate or optical read-write head optical read-write head such as coarse adjustment actuating moment that the discreteness of the physical address of CD is moved radially in that camera lens takes place, during dummy section (but zone of store regenerated data) more than the capacity that memory buffer generation read command requires, termination carries out that the next one writes seeks the rail action, and carries out the processing of read command.
At this,,, after seeking rail action termination, can carry out at once and read processing if in memory buffer, guarantee to carry out the zone of reading of minimum in advance in order to write interruption and the processing of being followed of reading more expeditiously.
In addition, obtain surpassing the situation of the spatial capacity (but zone of store regenerated data) of the required capacity of the processing of read command, read earlier to handle, can expect answering property of speed last rank device by surmounting the specified address of read command in the moment of writing interruption.
If according to the present invention, the situation read command of writing is in proper order followed write order and is come, and also responds this read command, can prevent the overtime situation of rank device judgement from CD read-outing data at once.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of optical disc apparatus, have and store the memory buffer of desiring to be recorded in optical disc data and storing the data of reading by CD, it is characterized by and have: decision maker, according to write order from external device (ED), this memory buffer receive logic address continuous write data to till the full state after, in the situation that receives read command by this external device (ED), judge among the stored data of this memory buffer according to set data volume unit whether have the null data area that comprises the recorded data zone at least of the data volume that meets this read command requirement; And
Control device, judge the situation of the null data area that has the data volume that meets this read command requirement at this decision maker, between according to the processing of this write data of physical address journal of this CD, interrupt this recording processing, and in response to this read command from this CD read-outing data, and with the data storing of being read in this null data area.
The present invention also provides a kind of optical disc apparatus, have and store the memory buffer desire being recorded in optical disc data and to store the data of reading, it is characterized by by CD: in this memory buffer setting in order to store the read data reserved area of the data of reading from this CD; And have control device, according to write order from external device (ED), this memory buffer receive logic address continuous write data to till the full state after, when receiving read command by this external device (ED), after interrupting this recording processing during according to the processing of this write data of physical address journal of this CD,, the data of being read and follow-up first read data be stored in this read data reserved area and comprise the null data area in recorded data zone at least from this CD read-outing data in response to this read command.
Description of drawings
Fig. 1 is the unitary construction figure of the optical disc apparatus of embodiment.
Fig. 2 be embodiment processing flow chart (one of).
Fig. 3 is the processing flow chart (two) of embodiment.
Fig. 4 is the state description figure of memory buffer.
Fig. 5 is other state description figure of memory buffer.
Fig. 6 is other state description figure of memory buffer.
Fig. 7 is other state description figure of memory buffer.
Fig. 8 is other state description figure of memory buffer.
The reference numeral explanation
10 CDs
12 Spindle Motor SPM
14 drivers
16 optical read-write heads
18 coarse adjustment actuators
20 drivers
22 drivers
24 automatic power control circuitries (APC)
The 26RF circuit
28 address decoding circuitries
30 servo processors
32 system controllers
34 binarization circuits
36 coding/decoding circuit
38 memory buffer
40 interface I/F
42 write strategy circuit
Embodiment
Below, the accompanying drawings embodiments of the invention.
Fig. 1 represents the unitary construction figure of the optical disc apparatus of present embodiment.Utilize Spindle Motor (SPM) 12 to drive rewritable CD 10 rotations such as DVD-RAM.With driver 14 drive shaft motor SPM12, driver 14 utilizes servo processor 30 to carry out servocontrol, to become desired rotating speed.
Optical read-write head 16 comprises in order to the laser diode (LD) of CD 10 irradiating lasers or be converted to the photodetector (PD) and CD 10 configuration in opposite directions of electric signal after accepting reflected light from CD 10.Utilize the radial drive optical read-write head 16 of coarse adjustment actuator 18, drive coarse adjustment actuator 18 with driver 20 at CD 10.Driver 20 carries out servocontrol with the driver 14 the same servo processors 30 that utilize.In addition, utilize driver 22 to drive the LD of optical read-write head 16, utilize automatic power control circuitry (APC) 24 Control Driver 22, make drive current become desired value.The drive current of APC24 Control Driver 22 makes to become the selected optimal recording power of OPC (Optimum PowerControl) that utilization is carried out at the test zone (PCA) of CD 10.OPC is after the PCA of CD 10 makes recording power become multistage to change the ground record test data, this test data of regenerating, assess its signal quality after, selection can obtain the processing of the recording power of desired signal quality.Signal quality adopts β value or γ value, percentage modulation beat (jitter) etc.
When regeneration CD 10 recorded data,, export after with PD its reflected light being converted to electric signal from the laser of the LD of optical read-write head 16 irradiation regenerating power.Supply with the regenerated signal of RF circuit 26 from optical read-write head 16.RF circuit 26 is supplied with servo processor 30 after regenerated signal produces focus error signal or tracking error signal.Servo processor 30 carries out servocontrol according to these error signals to optical read-write head 16, optical read-write head 16 is remained on focusing state or to the rail state.In addition, RF circuit 26 is supplied with the contained address signal of address decoding circuitry 28 regenerated signals.Address decoding circuitry 28 is supplied with servo processor 30 or system controller 32 after the address date demodulation of address signal with CD 10.Utilize CAPA (Complimentary Allocated Pit Addressing) mode can obtain address date in the situation of DVD-RAM, regeneration is positioned at the address date of the message title portion that is write down in fan section (sector).In addition, RF circuit 26 is supplied with binarization circuit 34 regeneration RF signals.Binarization circuit 34 with the regenerated signal binaryzation after, resulting signal is supplied with coding/decoding circuit 36.At coding/decoding circuit 36, obtain playback of data after two-value signal carried out the 8-16 demodulation and correct mistake, I/F40 exports this playback of data to main devices such as personal computers via interface.In addition, when main device is exported playback of data, coding/decoding circuit 36 is temporary in memory buffer 38 back outputs with playback of data.
When CD 10 record data, the data that the desire of independently installing via interface I/F40 supply coding/decoding circuit 36 writes down.Coding/decoding circuit 36 after memory buffer 38, after the digital coding with this desire record, is supplied with the data storing of desire record and is write strategy circuit 42 as the 8-16 modulating data.After writing strategy circuit 42 and the ETM data being converted to multiple-pulse (train of impulses), supply with driver 22 as record data according to set Write strategy.Write strategy is for example by constituting in the pulsewidth of multipulse front pulse or pulsewidth, the pulse duty (pulse duty) of succeeding impulse.Because of Write strategy influence record quality, generally be fixed as certain optimal strategy.The setting recording strategy also can in the lump when OPC.Laser after the LD of optical read-write head 16 irradiation is carried out power modulation according to record data, with data recording in CD 10.Behind the record data, the laser of optical read-write head 16 irradiation regenerating powers, these record data of regenerating are supplied with RF circuit 26.RF circuit 26 is supplied with binarization circuit 34 regenerated signals, the 8-16 modulating data after supply coding/decoding circuit 36 binaryzations.Coding/decoding circuit 36 is replaced processing with the decoding of 8-16 modulating data in situation about can't normally decipher.Particularly, to replacing the recorded data that regional record is stored in memory buffer 38.
In addition, DVD-RAM etc. are the fan section forms, because of according to 1 ECC square (16 fan sections) records data in units, must store the record data of 16 fan section components in memory buffer 38.Therefore, the situation of record data, less than 1 ECC square the time, need be with the data that are made as 1 ECC square component after filling up someway.The method that is made as the data of 1 ECC square component has several, and first method is to the address access that is equivalent to less than the CD 10 of the address of the dummy section of 1 ECC square component of memory buffer, read the data that are positioned at this address after, mend full memory buffer.Second method is the continuous situation about writing in proper order of initial logical address of the terminal logic address of the data that stored in memory buffer and the tentation data supplied with from external device (ED) in positive back, to the main matching requirements data of spatial capacity component only, by mending the dummy section (initial dummy section is the same with first method) of full terminal in dummy section in response to will independently installing the data storing of being supplied with in this requirement.Use any method all can.
At the optical disc apparatus 1 of present embodiment, system controller 32 control memory buffer 38 are carried out known delay to CD 10 and are write.In addition, suitably keep the data of being read in advance, help to reduce random access number of times CD from CD 10.The optical disc apparatus 1 of present embodiment is compared with optical disc apparatus 1 in the past, and the capacity of memory buffer 38 becomes big (for example 4MB), and LBA can accept continuous jumbo write data in proper order expeditiously., be afraid of that as CD as known dust or pollution etc. may not always can finish data recording with stable quality.Thereby DVD-RAM all sides and outer circumferential side in CD are provided with replaces the zone.CD 10 is being carried out in the data recording and processing, during the ad-hoc location generation write error in the zone in record because mend and fill out this position and must replace processing, to the data in the zone of replacing the failure of regional record data recording.At this moment, optical read-write head 16 follows track in record till at that time toward the rail of seeking of replacing the zone.Seek rail because of following, the required time of data recording greatly increases.That is, if increase the capacity of memory buffer 38, after autonomous device is accepted write order, take place to replace when handling among writing in proper order, autonomous device sends read command and also can't carry out at once, and the possibility of suffering overtime caused bus reset is big.
Therefore, system controller 32 when autonomous device is received read command in the write datas stored in the CD 10 record buffer storeies 38, is set and is represented to receive the mark of read command actually.Now executory write handle be over after, judge and whether set mark, if set mark, temporarily interrupt next predetermined carry out write processing after, check the user mode in the memory buffer 38.Judge among the write data be positioned at memory buffer 38 data (recorded data) that the record to CD 10 has been over and because of record is not over after the data (not record data) that need be stored in memory buffer 38 as yet, judge in the zone of the recorded data that is left of memory buffer 38 whether can carry out read command.In addition, because of carrying out according to 1 ECC square unit, also differentiate recorded data according to 1 ECC square unit to the record of CD 10 is as noted above.About the result of juggling, in the situation that the recorded data zone of distinguishing more than the specified capacity of read command exists, this recorded data zone is diverted in the storage area of read data in decision.Then, carry out set regeneration action according to the read command of being received.So, by the storage area of the recorded data zone being diverted to read data, and interrupt executory data recording action in that the random-access moment takes place, make and can promptly carry out read command, prevent overtime.
In addition, in the moment of receiving read command, when the above recorded data zone of the specified capacity of read command does not exist, finish next execution write processing after, reexamine memory buffer 38, carry out till the recorded data zone that produces more than the specified capacity of read command and write processing.If can guarantee the recorded data zone that both constant volumes is above, next predetermined writing to carry out before the processing and reading to handle of carrying out.
Finish read to handle after, to through waiting for next order of independently installing till the given time.Read command is come continuously, allows as long as also be positioned at the capacity in the recorded data zone of memory buffer 38, carries out after autonomous device takes orders.Also do not have the situation that order is come through given time, begin the data recording action of interrupting again.
Fig. 2 and Fig. 3 represent the processing flow chart of present embodiment.System controller 32 judges whether the order that autonomous device is received is write order (S101).In the situation that is write order, be stored in memory buffer 38 (S102) after the reception write data that write order added.Become the storage of carrying out till the full state (FULL) memory buffer 38 (S103) to memory buffer 38.At this, the full state of memory buffer 38 means the non-existent state of dummy section that is enough to store the write data of all independently installing.Check after the total volume of system controller 32 by the data of the initial logical address of foundation write data and terminal logic address computation desire record the dummy section whether this capacity is contained in memory buffer 38 judges whether be full state.In addition, storage about this write data is handled, though if the logical address of the write data of coming is continuously carried out continuously to all filling up till the dummy section of (using up) memory buffer 38, but in the not continuous situation of the logical address of the write data of coming continuously, the counting of the counter of counting discrete date is increased, when this counting surpassed definite value, the dummy section of memory buffer 38 not full up (not using up) was also ended to receive.This be since optical read-write head radially coarse adjustment activate the access speed followed and reduce, make main device wait for and exceed the necessary time, restriction that carry out is handled for fear of causing overtime.
Judge the situation of full states in memory buffer 38, the logical address of carrying out the write data (not record data) that memory buffer 38 is stored is transformed into the processing (S 104) of the physical address on the CD 10.This be since optical disc apparatus 1 to the operation of recording of CD 10 as at last writing and constitute as the processing once being carried out in the continuous interval of the physical address of CD 10.That is, once write that to handle be the unaided processing that can't interrupt.Thereby, in the continuous data of logical address, also may be transformed into behind the physical address replace handle wait become discontinuous.Therefore, before writing processing, carry out the logical physical address conversion processing earlier, then in the impact damper not the record data order that will write processing determine into the physical address order.Then, starting will this not record data be recorded in CD 10 write action (S105).Writing action, situation about existing at the dummy section less than 1 ECC square as noted above comprises the processing of mending full this dummy section.After constituting the continuous write data of physical address according to 1 ECC square unit, after memory buffer 38 is read these data successively, encode, supply with optical read-write head 16, with data recording in CD 10.The record of data (writing action) is when being over, when setting behind the strict slightly regeneration condition than general regeneration, and the identical physical address of regenerating, validation signal quality.Situation about can't normally decipher in that read error takes place etc. is replaced data to be recorded in and is replaced the zone.
The processing of the situation of action is write in interruption after Fig. 3 represents to receive read command.At first, system controller 32 judge whether have a requirement that meets read command in memory buffer 38 dummy section (zone of recorded data) (S202).Most be the situation of record data not (record is over to mean and not only just is recorded in CD 10 but also its checking also is over) apodia in memory buffer 38 with the dummy section of the requirement that meets read command, because of carrying out read command, get back to S110, continue to move to the processing of writing of S105 again, produce dummy section.In addition, mean at device at this dummy section and just needn't be stored in the zone of the recorded data of memory buffer 38 after perhaps the record of CD 10 being over energetically in the memory buffer 38 non-existent zone of record data not in the starting back.
There is the situation of the dummy section of the requirement that meets read command in memory buffer 38, is in the state that can store the read data of being read from CD 10.Therefore, system controller 32 confirms whether the desired data of read commands have been positioned at memory buffer 38 (S203), and the not record data that are positioned at the situation of memory buffer 38 reading these data or are stranded in memory buffer 38 are that this data conditions (obtain data or obtain cache memory) directly transmits these data (S208) to main device.Thereby, because of the processing of read command is over, remove the mark (S209) that sets.Do not obtaining data conditions, though need read from CD 10, but whether only read the desired address of read command, because of expecting that autonomous device sends read command continuously, by also reading address and the continuous data of desired data in advance, the cache memory that can improve in the read command of next time obtains rate.In addition,, will make always not record data are stranded in memory buffer 38, and, should handle not record data as early as possible, and make memory buffer 38 become empty, but and maximum limit ground is dealt with and will independently be installed the read command of coming continuously because this kind is not in good state if read command continues.Therefore, the not recording processing of record data is finished in order one by one, carries out the not processing in record data zone, more guarantees recorded data zone (null data area).In addition, the recording processing of S204 be physical address continuous write processing, and the situation of interrupting before checking is preferentially carried out not intact checking and is handled than other the processing of writing.Then, judge whether record data do not remain at (S205).In the non-existent situation of record data not, whole zone of memory buffer 38 can be used as the read data storage area, and situation about existing at record data not, after the buffer areas of retrieval with the stored read data among the memory buffer 38 (S206), from CD 10 sense datas (desired data+read earlier data), be stored in the zone of being retrieved (S207).After read data is stored in memory buffer 38, transmit (S208) from memory buffer 38 to main device, releasing marks (S209) is read to handle and finish.In addition, the read data storage area is also the same with the recorded data zone, can migrate to being stored in the zone of new read data.That is, come then not obtain data conditions at S203 in read command, the read data storage area also is used to together read handle and reads earlier with the recorded data zone handles.
After carrying out read command, return the execution of write order interrupting continuous writing to move as mentioned above.Then, when the record of residual write data all is over, end process (S109, S110).
On pattern, be illustrated in the state of memory buffer 38 in each stage of processing discussed above at Fig. 4 figure～Fig. 7.In addition, though the capacity of memory buffer 38 is arbitrarily, on figure,, be made as the data that can store 6 ECC square components for ease of explanation.
Fig. 4 is the state that is judged to be FULL after storing the continuous write data of logical address that autonomous device supplied with, is the state that is judged to be YES at the S103 of Fig. 2.From on be made as first data area～the 6th data area (data area separately is the capacity of 1 ECC square component) after, write data is stored in whole data areas,, be positioned at the state of " record " because of the record to CD 10 is not over as yet.Fig. 5 represents to carry out the logical physical address conversion processing from the state of Fig. 4, distinguish not record data according to address unit after, invest the state of the order of recording processing according to physical address.At Fig. 5, " not the writing down 3 " that begins to store " not writing down 1 " that the continuous data of physical address by 2 ECC square components constitute on certainly, constitutes by the continuous data of physical address of 1 ECC square component, " not writing down 2 " of constituting by the continuous data of physical address of 1 ECC square component, and " not writing down 4 " of constituting by the continuous data of physical address of 2 ECC square components.Do not write down 2 successively, do not write down 3, do not write down 4 recording processing according to the near order of physical address from writing down 1 beginning.As Fig. 5 for example shown in, the recording processing about to the data of the reality of CD 10 takes place to replace when handling, also become continuously in logical address at physical address discontinuous, with the physical address be benchmark when seeing the order of record may change.
Fig. 6 be to CD 10 according to the record of carrying out data at 1 continuous ECC square of physical address successively, become " not writing down 1 ", the state of " not writing down 2 " among the record buffer storer 38.Carve the state that system carries out the S105 of 2 Fig. 2 at this moment.Store not " not writing down 1 ", " not writing down 2 " of record data and be and write down (be recorded in CD 10 and checking is over), be in the state of " record 1 ", " record 2 ".The data area of having write down is storage data energetically, is the state that can write, i.e. Kong state.
Fig. 7 sends read command (S106) at autonomous device, sets mark (S107), interrupts writing processing (S108, S109) and before the processing of execution read command, handle not record data as far as possible, and carry out the state of recording processing of the part of the not record data can guarantee first read data zone, be the state behind the S204 of execution graph 3.Though also there is the spatial capacity (" having write down 1 ", " having write down 2 ") of the requirement that meets read command at state shown in Figure 6, but only with the desired data storing of read command when for example " having write down 1 ", because of need to read from CD 10 in the continuous situation of read command at every turn, efficient reduces.Again,, make record data continue to be detained also not only not good always, and when unexpected accident such as outage takes place, cause fatefulue data corruption probably the efficient of reading to handle in the continuous situation of read command.Must try one's best and promptly handle not record data.Therefore, as shown in Figure 7, after the not record data that will " not write down 3 " are recorded in CD 10,, guarantee dummy section as " having write down 3 ".Thereby desired data of read command not only, and also can read earlier to be stored in " having write down 2 ", " having write down 3 " after the follow-up data can be expected to utilize to obtain data and improve reading speed.In addition, read command is come continuously, when in memory buffer 38, not obtaining data (S203 of Fig. 3), and before handling read command, by writing down not record data (S204) at leisure, can be at as early as possible phase process record data not.In addition, at Fig. 7, state does not become " having write down 3 " from " writing down 3 ", the continuous posting field that has 4 ECC square components of " having write down 1 ", " having write down 2 ", " having write down 3 " by accident, but the utilization of the posting field in memory buffer 38 may not become continuous address configuration, please notes.
Fig. 8 is the action of writing in a part of carrying out record data not, guarantee dummy section again after, the data storing that will be read from CD 10 is in the state of memory buffer 38, is the state behind the S207 of execution graph 3.In the desired data of read command of 2 ECC squares of " having write down 1 " storage, store the data of reading earlier of 2 ECC squares " having write down 2 " and " having write down 3 ".Be sent to main device (S208 of Fig. 3) later in " having write down 1 " stored data.When autonomous device sends write order again, finish remaining " not writing down 4 ", the state of record data (S110) begins to receive data (S101, S102) again from do not have not fully in memory buffer 38.
Though above explanation embodiments of the invention, the present invention does not limit so, can carry out various changes.
For example, though at present embodiment, system controller 32 controls writing and reading memory buffer 38, also can certainly with controlling with system controller 32 different Memory Controllers.
In addition, though at present embodiment, obtain the probability of data (obtaining cache memory) for raising, before carrying out read command with the part of records of residual write data in CD 10, guarantee in order to store the zone of first read data, but do not carry out the processing of S204, and the processing of execution read data also can.In this situation, confirm already present dummy section, in the desired data capacity of the read command situation littler, after only reading earlier to be equivalent to the data of this difference, be stored in memory buffer 38 than this spatial capacity.
In addition, though at present embodiment, basically memory buffer 38 logically is not divided into and stores the zone of writing action and the zone that stores the read data of being read from CD 10, but also can the part of memory buffer 38 be appointed as the reserved area of read data the samely with known technology.In this situation,, needn't judge in the whether free zone of impact damper at S202 because of the storage area of read data always exists.
Claims (3)
1. an optical disc apparatus has the memory buffer that storage is desired to be recorded in optical disc data and stored the data of being read by CD, it is characterized by to have:
Decision maker, according to write order from external device (ED), this memory buffer receive logic address continuous write data to till the full state after, in the situation that receives read command by this external device (ED), judge among the stored data of this memory buffer according to set data volume unit whether have the null data area that comprises the recorded data zone at least of the data volume that meets this read command requirement; And
Control device, judge the situation of the null data area that has the data volume that meets this read command requirement at this decision maker, during according to the processing of this write data of physical address journal of this CD, interrupt this recording processing, and in response to this read command from this CD read-outing data, and with the data storing of being read in this null data area.
2. optical disc apparatus as claimed in claim 1, wherein, this control device increases null data area by the segment data record in the data area that will not be over for the record of this CD in this CD, and the data that will read from this CD in response to this read command and the follow-up first read data null data area that is stored in this increase.
3. an optical disc apparatus has the memory buffer that storage is desired to be recorded in optical disc data and stored the data of being read by CD, it is characterized by:
In this memory buffer setting in order to store the read data reserved area of the data of reading from this CD; And
Has control device, according to write order from external device (ED), this memory buffer receive logic address continuous write data to till the full state after, when receiving read command by this external device (ED), after interrupting this recording processing during according to the processing of this write data of physical address journal of this CD,, the data of being read and follow-up first read data be stored in this read data reserved area and comprise the null data area in recorded data zone at least from this CD read-outing data in response to this read command.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004326989 | 2004-11-10 | ||
| JP326989/04 | 2004-11-10 | ||
| JP356222/04 | 2004-12-09 |
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| Publication Number | Publication Date |
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| CN1790533A CN1790533A (en) | 2006-06-21 |
| CN100449630C true CN100449630C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101203199A Expired - Fee Related CN100449630C (en) | 2004-11-10 | 2005-11-08 | Optical disc apparatus |
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| Country | Link |
|---|---|
| CN (1) | CN100449630C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138189A (en) * | 1995-01-25 | 1996-12-18 | 索尼公司 | Reproducing apparatus having buffer memory and capable of rapidly restarting reproduction and method of controlling the apparatus |
| GB2314450A (en) * | 1996-06-21 | 1997-12-24 | Samsung Electronics Co Ltd | Memory control in a DVD player |
| CN1286792A (en) * | 1998-09-29 | 2001-03-07 | 松下电器产业株式会社 | Optical disk reproduction apparatus and method for controlling optical disk reproduction apparatus |
| CN1387189A (en) * | 2001-05-17 | 2002-12-25 | 日本先锋公司 | Receiving apparatus and its stream control method, and sending apparatus and its stream control method |
-
2005
- 2005-11-08 CN CNB2005101203199A patent/CN100449630C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138189A (en) * | 1995-01-25 | 1996-12-18 | 索尼公司 | Reproducing apparatus having buffer memory and capable of rapidly restarting reproduction and method of controlling the apparatus |
| GB2314450A (en) * | 1996-06-21 | 1997-12-24 | Samsung Electronics Co Ltd | Memory control in a DVD player |
| CN1286792A (en) * | 1998-09-29 | 2001-03-07 | 松下电器产业株式会社 | Optical disk reproduction apparatus and method for controlling optical disk reproduction apparatus |
| CN1387189A (en) * | 2001-05-17 | 2002-12-25 | 日本先锋公司 | Receiving apparatus and its stream control method, and sending apparatus and its stream control method |
Non-Patent Citations (1)
| Title |
|---|
| GB2314450 A 1997.12.24 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1790533A (en) | 2006-06-21 |
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