WO2004015705A1 - ディスク状情報記録媒体、その記録方法及び再生方法並びにその情報記録装置及び情報再生装置 - Google Patents
ディスク状情報記録媒体、その記録方法及び再生方法並びにその情報記録装置及び情報再生装置 Download PDFInfo
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- WO2004015705A1 WO2004015705A1 PCT/JP2003/009859 JP0309859W WO2004015705A1 WO 2004015705 A1 WO2004015705 A1 WO 2004015705A1 JP 0309859 W JP0309859 W JP 0309859W WO 2004015705 A1 WO2004015705 A1 WO 2004015705A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10675—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10675—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control
- G11B2020/10703—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control processing rate of the buffer, e.g. by accelerating the data output
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/1075—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data
- G11B2020/10759—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data content data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10814—Data buffering arrangements, e.g. recording or playback buffers involving specific measures to prevent a buffer underrun
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
- G11B2020/10944—Real-time recording or reproducing, e.g. for ensuring seamless playback of AV data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1816—Testing
- G11B2020/1826—Testing wherein a defect list or error map is generated
Definitions
- the present invention relates to a disk-shaped information recording medium such as a rewritable optical disk for recording / reproducing real-time data such as video and audio, a recording / reproducing method, an information recording apparatus and an information reproducing apparatus.
- DVD-RAM as an information recording medium for recording and reproducing real-time data such as video and audio data on a disk
- a playback standard model as shown in Fig. 8A is defined in order to guarantee real-time playback of distant data on a disk
- the access distance as shown in Fig. 8B is defined in the playback standard model.
- An access performance model that defines the relationship between and the access time was set.
- the playback standard model is created for the purpose of determining the conditions under which various types of playback devices can continuously play back real-time ⁇ data on an optical disc. According to the access performance model shown in Fig.
- the data in the buffer memory 103 does not underflow during access and the reproduced video and audio are not interrupted in order to reproduce the real-time data on the standard playback model.
- a data storage area is set in advance, and data is recorded by arranging real-time data in the set storage area. As described above, by recording data in a storage area satisfying the above-described access performance model, real-time data can be continuously reproduced at the time of subsequent reproduction substantially as set in the above-described standard reproduction model. Disclosure of the invention
- the conventional access performance model shown in Fig. 8B divides the access range into several sections so that the access time is constant in each section or the access time is proportional to the distance.
- the relationship between the actual access distance and the access time has a non-linear relationship, and in this conventional playback standard model, the actual access performance is set lower than the original access performance. Access time caused a large loss in access time.
- the present invention has been made in view of the problems of the conventional recording / reproducing method, and aims to realize efficient real-time recording by improving the accuracy of setting an access performance model.
- the playback standard model reads out real-time data from a disc-shaped information recording medium, a pickup, a buffer memory that temporarily holds the real-time data read out by pick-up, and reads out and processes real-time data from the buffer memory A decoding module.
- the access performance of the standard reproduction model is given by the following equation.
- T acc is an access time, which is the time required for the pickup to move from one area to another area
- d N is the difference between the number of revolutions of the disc-shaped recording medium before and after the pick-up movement
- T re V is the rotation waiting time at the access target position
- A is a constant
- B is a constant.
- the recording method uses a plurality of logically continuous unused areas in the disc-shaped information recording medium.
- a real-time file including real-time data is recorded on the disc-shaped information recording medium so that the real-time data is reproduced continuously.
- An information recording device for recording is provided.
- the playback standard model is a pickup that reads real-time data from a disk-shaped information recording medium, a buffer memory that temporarily holds real-time data read by the pickup, and a decoding module that reads and processes real-time data from the buffer memory.
- the access performance of the standard reproduction model is given by the following equation.
- T acc is an access time, which is the time required for the pickup to move from one area to another area
- d N is the difference between the number of revolutions of the disc-shaped recording medium before and after the pick-up movement
- T re V is the rotation waiting time at the access target position
- A is a constant
- B is a constant.
- the recording device is an area that satisfies the real-time playback condition, which is a playback condition that does not cause an underflow during playback, based on the access performance of the playback standard model, from a plurality of logically continuous unused areas in the disc-shaped information recording medium.
- the real-time data when reproducing real-time data in accordance with the reproduction standard model, the real-time data is reproduced from a disc-shaped information recording medium on which a real-time file containing the real-time data is recorded so that the real-time data is reproduced continuously.
- a reproduction method for reproducing real-time data is provided.
- the playback standard model reads out real-time data from a disc-shaped information recording medium and temporarily stores the real-time data read out by the pickup. And a decoding module for reading and processing real-time data from the buffer memory.
- the access performance of the standard reproduction model is given by the following equation.
- T acc is an access time that is the time required for the pickup to move from one area to another area
- d N is the difference between the number of rotations of the disk-shaped recording medium before and after the movement of the pickup
- T re V is the rotation waiting time at the access target position
- A is a constant
- B is a constant.
- the reproducing method includes a step of reading real-time data from the disc-shaped information recording medium, a step of temporarily storing the read real-time data in a buffer memory, and a step of reading the real-time data stored in the buffer memory and decoding the data. And accessing the next real time data within the access time T acc after accessing one real time data.
- a disc-shaped information recording medium on which a real-time file including the real-time data is recorded so that the real-time data is reproduced continuously.
- an information reproducing apparatus for reproducing real-time data from the information reproducing apparatus.
- the playback standard model is a pickup that reads real-time data from a disk-shaped information recording medium, a buffer memory that temporarily holds real-time data read by the pickup, and a decoding module that reads and processes real-time data from the buffer memory.
- the access performance of the standard reproduction model is given by
- T acc is the access time, which is the time required for the pickup to move from one area to another area
- d N is the difference between the number of revolutions of the disc-shaped recording medium before and after the movement of the pickup
- T re V is the rotation waiting time at the access target position
- A is a constant
- B is a constant
- the information reproducing apparatus comprises: a data reproducing means for reading real-time data from a disc-shaped information recording medium; and a buffer for temporarily storing the read real-time data. And a decoder for reading and decoding real-time data stored in the buffer memory. After accessing one real-time data, the data reproducing means accesses and reproduces the next real-time data within the access time Tacc.
- a disk-shaped information recording medium for recording a real-time file including the real-time data so that the real-time data is reproduced continuously when reproducing the real-time data in accordance with the reproduction standard model.
- the playback standard model reads out real-time data from a disc-shaped information recording medium.Pickup, buffer memory that temporarily holds real-time data read out by pick-up, and decoding that reads out and processes real-time data from the buffer memory Module.
- the access performance of the standard reproduction model is given by the following equation.
- T acc is an access time, which is the time required for the pickup to move from one area to another area
- d N is the difference between the number of revolutions of the disc-shaped recording medium before and after the pick-up movement
- T re V is the rotation waiting time at the access target position
- A is a constant
- B is a constant.
- Playback standard in multiple logically continuous unused areas in the disc-shaped information recording medium Real-time data in an area that satisfies the real-time playback condition that is a playback condition that does not cause underflow during playback determined based on the access performance of the model Is recorded.
- an access performance model is set by using a characteristic of a spindle motor and a rotation waiting time, and By approximating the expression of access performance focusing on the difference between the spindle speeds before and after, accurate access operation of the drive can be easily estimated, and the effect of realizing reliable real-time recording can be obtained. can get.
- FIG. 1A is a diagram showing a configuration of a reproduction standard model of the present invention.
- FIG. 1B is a diagram showing the access performance of the reproduction standard model of the present invention.
- FIG. 2A is a diagram showing the relationship between access time and spindle speed.
- FIG. 2B is a diagram showing the relationship between access time and seek distance.
- FIG. 3A is a diagram showing a physical format of a rewritable optical disc according to one embodiment of the present invention.
- FIG. 3B is a data structure diagram showing a data area of the rewritable optical disk.
- FIG. 4 is a data structure diagram showing an area configuration of the information recording medium.
- FIG. 5 is a block diagram of the information recording / reproducing apparatus of the present invention.
- FIG. 6A is a diagram showing an area allocated for a real-time file by the recording method of the present invention (before real-time data recording).
- FIG. 6B is a diagram showing an area allocated for a real-time file by the recording method of the present invention (after recording real-time data).
- FIG. 7 is a diagram showing a transition of data in the buffer memory calculated by the recording method of the present invention.
- FIG. 8A is a diagram showing a configuration of a conventional reproduction standard model.
- FIG. 8B is a diagram showing the access performance of the conventional playback standard model. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1A is a diagram showing a reproduction standard model for determining real-time data arrangement conditions according to the present invention
- FIG. 1B is a diagram showing its access performance.
- data is read from the disk 101, the disk 101, the pickup 102, the buffer memory 103 for temporarily storing the read data, and the data transferred from the buffer memory 103.
- It includes a decoding module 104 for decoding data.
- Vin transfers data from disk 101 to buffer memory 103. This is the data rate when sending.
- Vout is the data rate when data is transferred from the buffer memory 103 to the decoding module 104.
- Vin is set to a value larger than the maximum data rate Vout of real-time data assumed in the application.
- FIG. 1B is a diagram showing the relationship between the difference in the rotation speed of the spindle motor, that is, the difference in the disk rotation speed, and the access time when the pickup 102 of the reproduction standard model accesses.
- the disk rotation speed is controlled by the CLV (ConstantLitenearVeLocity) method, and if the area to be accessed is different in the radial direction, the disk rotation speed will be different.
- the disc rotation speed difference is a rotation speed difference before and after the pickup 102 moves from one area to another area.
- the access performance model is set based on the relationship between the disc rotation speed difference and the access time based on the following equation (1) under the following assumptions.
- a seek for moving the pickup 102 in the radial direction of the disk 101 is required. Further, as shown in FIG. 2A, the rotation of the spindle motor for rotating the disk is performed. It is also necessary to change the speed to the target speed.
- coarse seek which moves the pickup up to a position near the target track
- fine seek which finely adjusts the coarse seek and moves the pickup to the target track.
- the time required for the coarse seek can be set sufficiently smaller than the time required for changing the rotation speed of the spindle motor, and the access time in the performance of the spindle motor used in the optical disk drive can be set. The time required for changing the spindle speed is dominant.
- the motor torque Trq can be expressed by the following equation.
- Tr q (N1-N2) ⁇ J / (d t ⁇ K j)
- the access time Tacc can be formulated as the following equation (1).
- Nl initial rotation speed
- N2 target rotation speed
- J disk inertia
- Tr q motor tonolek
- K j conversion constant
- T rev average Rotation waiting time
- A B: Constant.
- Equation (1) When the force and the rotation waiting time T ree V are sufficiently small, the access time T ac c can be estimated linearly with respect to the disc rotation speed difference d N. From this, we assumed an access performance model as shown in Figure 1B. On the other hand, if the initial position and target position of the pickup are known, the rotational speed of the disk and the rotational speed difference can be uniquely obtained from the relationship with the linear velocity of the disk.
- the source address is A1
- the destination address is A2
- the radius positions are r1, r2, and the radius at the location where the address is 0.
- the addresses A 1 and A 2 are proportional to the area of the band, so that C is a constant and is expressed by the following equation.
- A1 C ⁇ (%-r I 2 — ⁇ ⁇ r O 2 )
- A2 C ⁇ ( ⁇ ⁇ r 2 2 one ⁇ ⁇ r O 2)
- the equation (1) that is, the access performance model shown in FIG. 1B is established for any initial position and target position of the pickup.
- d N becomes small and T rev becomes dominant.
- Tr ev can be calculated according to the position of the pickup, the access performance can be accurately obtained.
- the conventional access performance model shown in Fig. 8B divides the access range into several sections, and based on an approximate access time that is simply proportional to a certain access time or distance in each section. Because of the configuration, the access performance was set lower than the original access performance, causing a large loss in the actual access time.However, in the access performance model of the present invention, in the access performance model of the present invention, The access time can be obtained with high accuracy according to the actual access model.
- the rewritable optical disk 101 has a read-in area 410 from the inner periphery and a DMA (Defect Management) for managing defective sectors on the disk.
- t Area An area 402, a data area 420, and a read port area 412 are provided. Digital data is recorded in each area, and the digital data is managed in units called “sectors”.
- the data area 420 includes a spare area 403 for replacing a defective sector.
- the information area of the rewritable optical disc 101 is assigned a physical sector number for each physical sector from the inner circumference.
- the area where user data can be recorded is defined as a volume space to which a logical sector number is assigned for each logical sector. From the information area, the unused area in the lead-in area 401, the DMA area 402, the spare area 403, the defective sector registered in the PDL (Primary Defective List) in the DMA, and the read area are read from the information area. Area except for the region 412.
- a certification process is performed when the optical disc 101 is initialized.
- the defective sector is registered in the PDL.
- No logical sector number is assigned to a defective sector.
- a defective sector detected during data recording is replaced with a spare area 403 and registered in an SDL (SecondAry Defectiv eList) in the DMA area 402.
- FIG. 4 is a diagram showing a more detailed data structure of the rewritable optical disc in the present embodiment.
- an information area 430 composed of physical sectors includes a lead-in area 401, a DMA area 402, a data area 420, and a lead-fat area 412.
- a spare area 403 for alternately recording a defective sector or a defective block is arranged at the head of the data area 420, and a volume space is formed from the subsequent areas.
- the already allocated areas 405, 407, 408, and 409 are areas in which data has already been recorded.
- a defective ECC block 406 is formed between the real-time extent RT1 and the real-time extent RT2.
- real-time extents RT 3, RT 4, and RT 5 are allocated
- the defective ECC block 406 is a defective block detected during data recording, and the data that should be originally recorded in the defective ECC block is recorded in the spare area 403 instead.
- an empty extent 410 and an unrecorded area 4111 are formed.
- the real-time extents RT1 to RT5 are arranged so as to satisfy the conditions defined by the playback standard model having the specified access performance.
- FIG. 5 shows a block diagram of the information recording / reproducing device.
- the operation of recording a real time file on the optical disc 101 by the information recording / reproducing apparatus will be described.
- the information recording / reproducing device includes a system control unit 501, an IZO bus 506, an optical disk drive 507, a remote controller for inputting recording modes, etc., a mouse, a keyboard and other input devices 508, video and audio. It includes an encoder 509 for encoding a signal into audio 'video data (AV data), and a decoder 510 for decoding and outputting AV data.
- AV data audio 'video data
- the system control unit 501 is a recording mode setting unit 502, a memory for allocation parameters
- the file system processing section 504 includes a playback mode notification section 541 and a data amount calculation section.
- Time information calculation section 5 4 3 Time information calculation section 5 4 3, Unallocated area search section 5 4 4, Physical discontinuous position acquisition section 5 4 5, Data recording section 5 4 6, which controls data recording, and data reading And a data readout unit 547 for controlling the operation.
- These means use the file system processing memory 505.
- the memory for file system processing 505 is a memory for storing location information of an empty extent, a memory for storing time information, a memory for storing location information of a pre-allocated area, It includes a memory 554 for storing position information indicating physically discontinuous positions, a bitmap memory 555, and a data buffer memory 556.
- the access standard of the optical disk drive 507, the recording rate at the time of data recording, and the data recording capability realized by the size of the data buffer memory 556 correspond to the reproduction standard model shown in FIGS. 1A and 1B. It satisfies the recording performance realized when using for recording.
- the information recording / reproducing apparatus configured as described above performs a recording operation so as to satisfy the above-described reproduction standard model.
- the data storage area empty extent Z real-time extent
- the access performance model so that the data in the buffer memory 103 does not underflow during playback. Then, by recording data in the set area, it is possible to continuously reproduce real-time data at the time of subsequent data reproduction.
- the recording mode and the recording time are instructed from the input device 508.
- the recording mode setting section 502 includes a maximum transfer data rate Vout from the buffer memory 556 to the decoder 510, a read data rate Vin from the disk 101, a data size SR to be recorded, The buffer size B max and other various access times are determined and stored in the allocation parameter memory 503.
- the maximum data rate Vout is a fixed value, and is set to a value that enables recording even when recording at that rate is continued.
- Step 2 The physical discontinuity position acquisition unit 545 reports the position information of the defective sector or defect block registered in the PDL and SDL as the physical discontinuous position information on the disc 101 To the optical disk drive 5 ⁇ 7.
- the physical discontinuous position information reported from the optical disk drive 507 is stored in the physical discontinuous sales position memory 554.
- the unallocated area search unit 544 4 stores the position information of the unallocated area stored in the bitmap memory 555 and the physical discontinuous position stored in the physical discontinuous position memory 554. Using the information, the unallocated area on the disk that is physically continuous in ECC block units is searched as the pre-allocated area. The retrieved position information of the pre-allocated area is stored in the pre-allocated area memory 553. This search operation is performed until the total size of the searched pre-allocated area exceeds the data size SR.
- FIG. 6A is a diagram showing an arrangement of a pre-allocated area obtained by searching for a physically continuous unallocated area in ECC block units by the above procedure. Pre-allocation areas A1 to A5 are allocated.
- the time information calculation unit 543 uses the pre-allocated area position information stored in the pre-allocated area memory 553 and the various access times stored in the allocation parameter memory 503 to perform each pre-allocation.
- the read time TR i (i corresponds to i of the area number A i of the pre-allocated area shown in FIG. 6A) when the area is read at the data rate Vin, and the access times T i, i between the pre-allocated areas +1 (access time between the pre-allocated areas A i and A i +1 shown in FIG. 6A).
- the read times TR1 to TR5 are the times required to read the pre-allocated areas A1 to A5, respectively.
- T 1,2 is a read delay time due to a defective ECC block.
- T2,3, ⁇ 3,4, ⁇ 4,5 are the time required to access the pre-allocated areas A2 and A3, A3 and A4, and A4 and A5 respectively (access time) It is. These access times are obtained from the access performance of the playback standard model shown in Fig. 1B. The obtained access time T i, i + 1 is stored in the time information memory 552 together with the read time TR i.
- Step 4 the data amount calculation unit 542 performs the following steps using the read time and access time held in the time information memory 552.
- the amount of data in the buffer memory 556 at the end of reading the pre-allocated area is calculated.
- FIG. 7 shows a change in the amount of data in the buffer memory 556 when data in the pre-allocated area is read. For example, at time t1 after reading the pre-allocated area A1, the data amount increases at a data rate of (Vin-Vout) during the period TR1.
- Step 6 the amount of data in the buffer memory 556 at the start of reading the pre-allocated area is calculated. At time t2 before reading the pre-allocated area A2 in FIG. 7, the data amount decreases at the data rate of Vout in the periods Tl, 2.
- Step 7 Check whether the total data amount calculated here becomes negative. If the value is negative, this access will cause the buffer to underflow and data will be interrupted. If not, return to the beginning of (Step 4).
- pre-allocated areas A2 to A5 are calculated by repeating (Step 4) force (Step 6). During this time, since the data amount exceeds the allocation level BL in each of the sections TR3, TR4, and TR5 shown in Fig. 7, the pre-allocated areas A1 to A5 are sequentially assigned to the empty tents E as shown in Fig. 6A. Assigned as 1 to E5, and the location information is stored in the empty memory 551.
- the empty extent is an area reserved for recording real-time data, but an area in which no data has been recorded yet. With the above steps, the area (Emptiers tents E1 to E5) in which real-time data can be recorded is obtained.
- Step 8 Next, a procedure for recording data on the information recording medium will be described.
- the video / audio data input to the information recording / reproducing device is encoded into AV data by the encoder 509 using a variable-length compression method, and is transferred to the data buffer memory 556.
- the data recording unit 546 records the AV data in the already allocated empty extents E1 to E5.
- each of the empty extents becomes a real-time extent. Since the empty extents E1 to E5 are allocated using a fixed value data rate Vout that can support the highest image quality and sound quality, when the recording of the AV data is completed, It is left unused. That is, Empteier The area of the stent E 5 where data is recorded is defined as a real-time extent RT 5. Also, out of the empty extent E5, at the end of the AV data to be recorded, AV data is not recorded only in a part of the ECC block, and the area is set to the empty extent 410, and AV data is recorded in ECC block units. The area that is not recorded is the unrecorded area 4 1 1. Next, the operation of reproducing the real-time file from the optical disk 101 by the information recording / reproducing apparatus will be described.
- the data reading unit 547 reads real-time data from the optical disc 101.
- the data readout unit 547 accesses one real-time data, reads out the next real-time data within the access time T ac c, and then reads out the data.
- the read real-time data is temporarily stored in the buffer memory 556.
- the real-time data stored in the buffer memory 556 is then decoded via a decoder 510 specified as a decoding module in the standard reproduction model, and video and audio are reproduced.
- the real-time data arranged so as to satisfy the real-time reproduction condition satisfies the specified performance, thereby enabling continuous data reproduction.
- the function of the embodiment of the present invention is realized by hardware. Alternatively, part or all of the processing may be performed by software of a microcomputer.
- characteristic data such as constants A, B, and T rev in equation (1) relate to the basic performance of the optical disk drive 507. That is, the constant A includes the torque value T rq of the spindle motor, and this value depends on the access performance of the optical disk drive 507. Further, the average rotation waiting time T reV in the equation (1) has a different value depending on whether the recording / reproducing speed of the optical disk drive 507 is a standard speed, a double speed or higher. Further, the constant B is, for example, the time required to issue a command of the interface of the optical disc drive 507 or EC This is related to drive performance such as the time required for C decoding.
- these characteristic data are previously stored in a non-illustrated non-volatile memory of the system control unit 501, and are read from the non-volatile memory when the apparatus and the system control unit 501 are started.
- the formula (1) may be used to construct a reproduction standard model.
- the constant A in the equation (1) includes the inertia J of the disk, and the value J of the inertia may vary depending on manufacturing tolerances of the disk.
- the value is estimated from the following equation based on the time required at that time, a constant A is obtained based on the value, and a constant B is further obtained.
- raw data such as constants A, B and Trev can be recorded in a specific area of the disc.
- N instantaneous rotation speed during acceleration / deceleration
- f (N) function of N.
- the access time of the pickup should be estimated according to the trapezoidal speed profile consisting of the acceleration area at constant acceleration, the constant speed area, and the deceleration area at constant deceleration. May be possible.
- An example For example, when the acceleration and deceleration are assumed to be 0.1 G and the constant speed is assumed to be 5 csec, the time required for the coarse seek becomes more dominant than the time required for the spindle lock in the access time.
- the movement of the lens provided on the pickup may be estimated so as to move in a fixed time for each track, or every ten to several hundred tracks. It may be estimated to move in a certain time.
- optical disk and the optical disk recording / reproducing apparatus and method of the present invention can easily estimate an accurate drive access operation, thereby realizing reliable real-time recording and recording real-time data such as optical video and audio.
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Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/523,612 US7512040B2 (en) | 2002-08-08 | 2003-08-04 | Method and apparatus for recording real-time data into an optical disc |
| CA002494912A CA2494912A1 (en) | 2002-08-08 | 2003-08-04 | Disc-shaped information recording medium, recording method and reproduction method thereof, information recording device, and information reproduction device thereof |
| AU2003254802A AU2003254802A1 (en) | 2002-08-08 | 2003-08-04 | Disc-shaped information recording medium, recoding method and reproduction method thereof, information recording device, and information reproduction device thereof |
| EP03784512A EP1553587A4 (en) | 2002-08-08 | 2003-08-04 | DISK RECORDING MEDIUM, RECORDING METHOD, AND PLAYING METHOD THEREFOR, INFORMATION RECORDING DEVICE, AND INFORMATION REPRODUCTION DEVICE THEREFOR |
| US12/398,591 US7848184B2 (en) | 2002-08-08 | 2009-03-05 | Reproducing method for reproducing real time data from a disk-shaped information recording medium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002231385 | 2002-08-08 | ||
| JP2002-231385 | 2002-08-08 |
Related Child Applications (2)
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|---|---|---|---|
| US10523612 A-371-Of-International | 2003-08-04 | ||
| US12/398,591 Division US7848184B2 (en) | 2002-08-08 | 2009-03-05 | Reproducing method for reproducing real time data from a disk-shaped information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004015705A1 true WO2004015705A1 (ja) | 2004-02-19 |
Family
ID=31711744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/009859 Ceased WO2004015705A1 (ja) | 2002-08-08 | 2003-08-04 | ディスク状情報記録媒体、その記録方法及び再生方法並びにその情報記録装置及び情報再生装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US7512040B2 (ja) |
| EP (1) | EP1553587A4 (ja) |
| CN (2) | CN101369441A (ja) |
| AU (1) | AU2003254802A1 (ja) |
| CA (1) | CA2494912A1 (ja) |
| WO (1) | WO2004015705A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1592012A3 (en) * | 2004-04-28 | 2006-01-11 | Fujitsu Ten Limited | Recording and reproducing apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4948531B2 (ja) | 2006-04-28 | 2012-06-06 | パナソニック株式会社 | コンテンツ再生装置 |
| US8136016B1 (en) | 2007-11-08 | 2012-03-13 | Marvell International Ltd. | Split sector recovery method |
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| JPH06318366A (ja) * | 1993-05-07 | 1994-11-15 | Matsushita Electric Ind Co Ltd | ディスク装置 |
| JPH08273291A (ja) * | 1995-03-31 | 1996-10-18 | Matsushita Electric Ind Co Ltd | モータの回転制御方法及びモータの回転制御装置及びディスク再生装置 |
| JP2000113584A (ja) * | 1998-10-08 | 2000-04-21 | Sony Corp | 光ディスク装置及び光ディスク装置の制御方法 |
| JP2001052436A (ja) * | 1999-08-09 | 2001-02-23 | Victor Co Of Japan Ltd | 記録装置 |
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2003
- 2003-08-04 CN CNA2008100991507A patent/CN101369441A/zh active Pending
- 2003-08-04 WO PCT/JP2003/009859 patent/WO2004015705A1/ja not_active Ceased
- 2003-08-04 CA CA002494912A patent/CA2494912A1/en not_active Withdrawn
- 2003-08-04 AU AU2003254802A patent/AU2003254802A1/en not_active Abandoned
- 2003-08-04 EP EP03784512A patent/EP1553587A4/en not_active Withdrawn
- 2003-08-04 US US10/523,612 patent/US7512040B2/en not_active Expired - Lifetime
- 2003-08-04 CN CNB03818589XA patent/CN100394503C/zh not_active Expired - Fee Related
-
2009
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| JPH06318366A (ja) * | 1993-05-07 | 1994-11-15 | Matsushita Electric Ind Co Ltd | ディスク装置 |
| JPH08273291A (ja) * | 1995-03-31 | 1996-10-18 | Matsushita Electric Ind Co Ltd | モータの回転制御方法及びモータの回転制御装置及びディスク再生装置 |
| JP2000113584A (ja) * | 1998-10-08 | 2000-04-21 | Sony Corp | 光ディスク装置及び光ディスク装置の制御方法 |
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| EP1592012A3 (en) * | 2004-04-28 | 2006-01-11 | Fujitsu Ten Limited | Recording and reproducing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1553587A1 (en) | 2005-07-13 |
| EP1553587A4 (en) | 2007-02-21 |
| AU2003254802A1 (en) | 2004-02-25 |
| CN100394503C (zh) | 2008-06-11 |
| US7848184B2 (en) | 2010-12-07 |
| US20060104147A1 (en) | 2006-05-18 |
| CA2494912A1 (en) | 2004-02-19 |
| CN1675704A (zh) | 2005-09-28 |
| CN101369441A (zh) | 2009-02-18 |
| US7512040B2 (en) | 2009-03-31 |
| US20090175137A1 (en) | 2009-07-09 |
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