JP2000067511A - Reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently utilize the max. data transfer rate. SOLUTION: This reproducing device has a disk rotating means which is capable of rotating a loaded disk at a specified angular speed, a capacity detecting means which detects the logic block address of the data recorded in the outermost periphery of the data area recorded with the data as the data capacity recorded on the disk from a control information area of the disk and a control means which executes the control of the disk rotating means in accordance with the data capacity detected by the capacity detecting means. The device sets the disk rotating speed according to the data capacity (S007, S009, S010, S014, S016), S017).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus for reading data by rotating a loaded disk at a constant angular velocity when reproducing a disk on which data is recorded so as to maintain a constant linear velocity. Things.

[0002]

2. Description of the Related Art Recently, for example, disks have become widespread as recording media. In many of these discs, it is desirable to record over the entire recording area of the disc at the same density as the inner circumferential side thereof over the entire recording area of the disc in order to reduce the size of the disc or increase the recording capacity efficiency. In a disk drive device, data recorded on a disk is read while a pickup as data reading means is moved in the radial direction of the disk. In this case, when data recorded on the inner peripheral side is reproduced or When data recorded on the outer peripheral side is reproduced, that is, the drive control of the spindle motor is performed according to the position of the pickup, and the CLV (Consta
ntLinear Velocity) control is employed. Therefore, for example, the linear velocity of a CD (Compact Disc) is set to, for example, 1.2 to 1.4 m / s, and the linear velocity is set to be constant for one disc. in this case,
For example, when reproduction is performed at 1 × speed, when the pickup is on the inner circumference side of the disc, about 600 rpm, and when the pickup is on the outer circumference side of the disc, about 2 rpm.
00 rpm.

[0003]

By the way, with the spread of disk media, it is desired to shorten the access time of a disk drive. That is, the access time is shortened by increasing the number of rotations of the disk and shortening the rotation waiting time. However, in CLV control, it is necessary to change the rotation speed of the disk according to the position of the pickup in the radial direction of the disk.
A load is imposed on the rotation control process.

Therefore, in order to improve the access time, the rotation speed of the disk is kept constant to keep the CAV (Constant A).
ngular Velocity) control is the mainstream. However, when data is read from a disk created on the assumption of CLV control by CAV control, the transfer rate differs between the inner and outer peripheral sides of the disk. In this case, if the capacity of the data recorded on the disk is large and the recording is performed from the inner circumference to the vicinity of the outer circumference, the data transfer is performed at the maximum transfer rate of the disk drive device on the outer circumference of the disk. Can do it. However, when a disk having a relatively small data recording capacity, for example, a disk on which recording is performed only up to about an intermediate point between the inner circumference and the outer circumference, is performed, the data transfer is performed at a position where the maximum transfer rate can be realized. No recording has been made. That is, when data is read from a disk having a relatively small data capacity, there is a problem that the transfer capability of the disk drive device is maximized.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention is directed to a reproducing apparatus capable of reproducing a disk on which data is recorded so as to have a constant linear velocity. A disk rotating means capable of rotating the disk at a constant angular velocity, and a logical block address of data recorded on an outermost periphery of a data area in which the data is recorded, as a data capacity recorded on the disk. A capacity detecting means for detecting from the management information area of the disc, and a control for controlling the disc rotating means based on the data capacity detected by the capacity detecting means, and for controlling to rotate the disc at a predetermined number of revolutions A playback device is provided with the means. Further, the control means controls the disk rotating means based on the data capacity detected by the capacity detection means so that the data recorded on the outermost periphery can be read at the maximum transfer rate in the reproducing apparatus. Take control.

Further, in a reproducing apparatus capable of reproducing a disk on which data is recorded so as to have a constant linear velocity, a disk rotating means capable of rotating the loaded disk at a constant angular velocity; Disk diameter information detecting means for detecting the diameter information of the disk from the management information area of the disk, and controlling the disk rotating means on the basis of the disk diameter information detected by the disk diameter information detecting means. A playback device is provided with control means for controlling rotation at the rotation speed. Further, the control means is configured to read the data recorded on the outermost periphery based on the disk diameter information detected by the disk diameter information detecting means so that the data can be read out at a maximum transfer rate in the reproducing apparatus. Control the rotating means.

According to the present invention, the rotation speed of the disk is set in accordance with the data capacity of the disk. Therefore, even for a disk having a small data capacity, it can be realized in the signal processing of the reproducing apparatus. The maximum transfer rate can be obtained. Further, since the rotation speed of the disk is set in accordance with the diameter of the disk, it is possible to obtain the maximum transfer rate achievable in the signal processing of the reproducing apparatus even for a disk having a small data diameter. You can do it.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a reproducing apparatus according to the present invention will be described below in the following order. 1. 1. Configuration of playback device 2. TOC and subcode of CD 3. Structure of DVD lead-in area Configuration of Disc (DVD) Rotation speed setting

1. Configuration of Reproducing Apparatus The optical disc loaded in the reproducing apparatus (disc drive) of the present embodiment is, for example, a DVD (Digital
ile Disc) or a CD-type disc such as a CD-ROM. Of course, the present invention can be applied to a reproducing apparatus compatible with other types of optical disks.

FIG. 1 is a block diagram of a main part of a disk drive device 70 of the present embodiment. The disk 90 is, for example, a CLV
When data is recorded in the disk drive device 70, the data is recorded on the turntable 7,
During the reproducing operation, the spindle motor 6 is driven to rotate at a constant angular velocity (CAV), for example. The pickup 1 reads data recorded on the disk 90 in the form of embossed pits or phase change pits. In this example, a description will be given of a CAV method, but it is also possible to perform a rotational drive with a constant linear velocity (CLV) method.

In the pickup 1, a laser diode 4 serving as a laser light source, a photodetector 5 for detecting reflected light, an objective lens 2 serving as an output end of the laser light,
An optical system is formed which irradiates the laser beam onto the disk recording surface via the objective lens 2 and guides the reflected light to the photodetector 5. The objective lens 2 is held by a biaxial mechanism 3 so as to be movable in a tracking direction and a focus direction. The entire pickup 1 can be moved in the disk radial direction by a thread mechanism 8.

The information on the reflected light from the disk 90 is detected by the photodetector 5, converted into an electric signal corresponding to the amount of received light, and supplied to the RF amplifier 9. The RF amplifier 9 includes a current-voltage conversion circuit, a matrix operation / amplification circuit, and the like corresponding to output currents from a plurality of light receiving elements as the photodetector 5, and generates necessary signals by matrix operation processing. For example, it generates an RF signal as reproduction data, a focus error signal FE for servo control, a tracking error signal TE, and the like. The reproduction RF signal output from the RF amplifier 9 is supplied to a binarization circuit 11, and the focus error signal FE and the tracking error signal TE are supplied to a servo processor 14.

The reproduced RF signal obtained by the RF amplifier 9 is 2
By being binarized by the value conversion circuit 11, it is converted into a so-called EFM signal (8-14 modulated signal; in the case of CD) or an EFM + signal (8-16 modulated signal; in the case of DVD), and supplied to the decoder 12. The decoder 12 performs EFM demodulation, error correction processing, and the like.
The information read from the disk 90 is reproduced by performing OM decoding, MPEG decoding, or the like.

The decoder 12 accumulates the data subjected to the EFM demodulation in a cache memory 20 as a data buffer, and performs error correction processing and the like on the cache memory 20. Then, the buffering to the cache memory 20 is completed in a state where the error is corrected and the reproduced data is proper. As the reproduction output from the disk drive device 70, the data buffered in the cache memory 20 is read and transferred and output.

The interface section 13 is connected to an external host computer 80, and is connected to the host computer 80.
The communication of the reproduction data, the read command, and the like is performed with the communication device.
That is, the reproduction data stored in the cache memory 20 is
The host computer 8 via the interface unit 13
0 is transferred and output. The read command and other signals from the host computer 80 are transmitted to the interface unit 1
3 to the system controller 10.

The servo processor 14 detects various focus, tracking, thread, and spindle servo drives based on a focus error signal FE and a tracking error signal TE from the RF amplifier 9 and a spindle error signal SPE from the decoder 12 or the system controller 10. A signal is generated to execute a servo operation. That is, the focus error signal FE and the tracking error signal T
A focus drive signal and a tracking drive signal are generated according to E and supplied to the two-axis driver 16. The two-axis driver 16 drives the focus coil and the tracking coil of the two-axis mechanism 3 in the pickup 1. As a result, a tracking servo loop and a focus servo loop are formed by the pickup 1, the RF amplifier 9, the servo processor 14, the two-axis driver 16, and the two-axis mechanism 3.

The servo processor 14 sends a spindle error signal SP to the spindle motor driver 17.
The spindle drive signal generated according to E is supplied. The spindle motor driver 17 applies, for example, a three-phase drive signal to the spindle motor 6 according to the spindle drive signal, and causes the spindle motor 6 to perform CAV rotation. In the case of the CAV method, the spindle error signal SPE can be obtained by comparing a later-described FG pulse with reference speed information. In addition, the servo processor 14 generates a spindle drive signal in response to a spindle kick / brake control signal from the system controller 10, and causes the spindle motor driver 17 to execute operations such as starting and stopping the spindle motor 6.

The rotation speed of the spindle motor 6 can be set to a high speed such as n × 2 speed, n × 4 speed, and n × 8 speed when the normal speed is n times speed. Such a speed setting is performed by the system controller 10.
Is realized by variably setting the reference speed information to be compared with the spindle error signal SPE. Further, in the present invention, a determination reference capacity for selecting reference speed information and setting a disk rotation speed is recorded in the memory 22.
As will be described later, this determination reference capacity is compared with the data capacity recorded on the disk 90, and required reference speed information is selected based on the comparison result.
The disk rotation speed set based on the comparison result is a speed at which the maximum data transfer rate in the disk drive device 70 can be obtained.

The FG 21 generates a frequency pulse (FG) pulse corresponding to the rotation speed of the spindle motor 6 and supplies it to the servo processor 14. For example, six FG pulses are generated for one rotation of the spindle motor 6.

The linear velocity of the spindle motor 6 as CLV rotation can be set to various speeds by the system controller 10. For example, the decoder 12 generates a reproduction clock synchronized with the EFM signal for use in the decoding process, and can obtain current rotation speed information from the reproduction clock. The system controller 10 or the decoder 12 generates a spindle error signal SPE for CLV servo by comparing such current rotational speed information with reference speed information. Therefore,
The system controller 11 can change the linear velocity as the CLV rotation by switching the value as the reference velocity information. For example, linear speeds such as 4 × speed and 8 × speed can be realized based on a certain normal linear speed. As a result, the data transfer rate can be increased.

The servo processor 14 generates a thread drive signal based on, for example, a thread error signal obtained as a low-frequency component of the tracking error signal TE and an access execution control from the system controller 10 and supplies the thread drive signal to the thread driver 15. . The thread driver 15 responds to the thread drive signal by the thread mechanism 8.
Drive. Although not shown in the thread mechanism 8, a main shaft for holding the pickup 1, a thread motor,
The pickup 1 has a required sliding movement by having a mechanism such as a transmission gear and driving the sled motor 8 by the sled driver 15 according to the sled drive signal.

The laser diode 4 in the pickup 1 is driven by a laser driver 18 to emit laser light. The system controller 10 sets the control value of the laser power in the auto power control circuit 19 when executing the reproducing operation on the disc 90, and the auto power control circuit 19 performs the laser output according to the set laser power value. The laser driver 18 is controlled so as to be operated.

Various operations such as servo, decoding and encoding as described above are controlled by a system controller 10 formed by a microcomputer.
Then, the system controller 10 executes various processes in response to a command from the host computer 80. For example, when a read command requesting transfer of certain data recorded on the disk 90 is supplied from the host computer 80, first, seek operation control is performed for the designated address. That is, a command is issued to the servo processor 14 to execute the access operation of the pickup 1 targeting the address specified by the seek command. Thereafter, operation control necessary for transferring the data in the specified data section to the host computer 80 is performed. That is, data reading / decoding / buffering from the disk 90 is performed, and the requested data is transferred.

A read command from the host computer 80, that is, a transfer request, has a request start address which is the first address of a requested data section and a request data length (data length) as a section length from the first address. . For example, a transfer request with a request start address = N and a request data length = 3 corresponds to LBA “N” to LB
A means a data transfer request of three sectors of “N + 2”. LBA is a logical block address (LOGICAL BLOCK
ADDRESS), which is an address given to the data sector of the disk 90.

In the present invention, the rotational speed of the disk 90 is set according to the data capacity of the disk 90. For example, when the disc 90 is a CD, the data capacity can be detected based on the TOC in the lead-in area and the absolute time address in the subcode. When the disc 90 is a DVD, the last sector number recorded in the logical format information of the lead-in area is the information corresponding to the data capacity. The TOC and subcode of a CD and the lead-in area of a DVD will be described below.

2. Next, the TOC and subcode recorded in the lead-in area when the disc 90 is a CD will be described. The minimum unit of data recorded on the disc 90 is one frame. One block (one subcoding frame) is composed of 98 frames.

The structure of one frame is as shown in FIG. 1
The frame is composed of 588 bits, the first 24 bits of which are synchronous data, the following 3 bits are set with a margin bit, and the subsequent 14 bits are a subcode data area. Thereafter, main data of 12 symbols and parity data of 4 symbols are arranged.

One frame is composed of 98 frames, and sub-code data extracted from 98 frames are collected to form one block of sub-code data as shown in FIG. . The first and second frames (frames 98n + 1, 98n,
The subcode data from the frame 98n + 2) is a synchronization pattern. And, from the third frame to the 98th
Frame (frame 98n + 3 to frame 98n + 9
Up to 8), 96-bit channel data, that is, P, Q, R, S, T, U, V, and W subcode data are formed.

Of these, P-channel and Q-channel used as reproduction management information are used for various controls related to reproduction such as access. However, the P channel only indicates a pause portion between tracks, and more detailed control is performed by the Q channel (Q1 to Q96). The 96-bit Q channel data is configured as shown in FIG. The data of the R channel to the W channel are provided to form a text data group, which will be described later.

First, four bits Q1 to Q4 are used as control data, and are used for the number of audio channels, emphasis, identification of a CD-ROM, and the like. That is, the 4-bit control data is defined as follows. "0 ****" ... 2 channel audio "1 **" ... 4 channel audio "* 0 **" ... CD-DA "* 1 **" ... CD -ROM "** 0 *" ... Digital copy not possible "** 1 *" ... Digital copy possible "**** 0" ... No pre-emphasis "**** 1"・ With pre-emphasis

Next, the four bits Q5 to Q8 are used as addresses, which are control bits for the sub-Q data. When the address 4 bits are "0001", it indicates that the subsequent sub-Q data of Q9 to Q80 is audio Q data, and when it is "0100",
Subsequent Q data of Q9 to Q80 is video Q data. Q9 to Q80 form 72-bit sub-Q data, and the remaining Q81 to Q96 are CRC.

In the lead-in area, the sub-Q data recorded therein becomes the TOC information. That is, the 72-bit sub Q data of Q9 to Q80 in the Q channel data read from the lead-in area is:
It has information as shown in FIG. The sub-Q data has 8-bit data.

First, a track number is recorded. In the lead-in area, the track number is fixed to “00”. Next, POINT (point) is described, and MIN (minute), SEC
(Second) and FRAME (frame number) are shown. Further, PMIN, PSEC, and PFRAME are recorded.
The meaning of the value of NT is determined as described below.

The value of POINT is "01h" to "99h"
When (h indicates hexadecimal notation), the value indicates a track number, and in this case, PMIN, PSE
In C and PFRAME, the start point (absolute time address) of the track of the track number is minute (PMIN), second (PSEC), and frame number (PFR).
AME).

When the value of POINT is "A0h", P
The track number of the first track is recorded in MIN. Also, CD-DA, CD-
I and CD-ROM (XA specification) are distinguished. POIN
When the value of T is “A1h”, the track number of the last track is recorded in PMIN. When the value of POINT is “A2h”, PMIN, PSEC, PFRAM
In E, the start point of the lead-out area is indicated as an absolute time address.

For example, in the case of a disc on which six tracks are recorded, data is recorded as a TOC using such sub-Q data as shown in FIG. As shown in FIG. 5, the track numbers TNO are all "00h". Block NO. Indicates the number of one unit of sub-Q data read as block data of 98 frames as described above. Each TOC data has the same contents written over three blocks. As shown, when POINT is "01h" to "06h",
Track # 1 as PMIN, PSEC, PFRAME
~ The start point of track # 6 is shown.

When POINT is "A0h", P
“01” is indicated as the first track number in MIN. The disc is identified by the value of PSEC, and when this disc is a CD-DA, as shown in FIG.
EC = “00h”. In addition, CD-ROM (XA
PSEC = “20h” in the case of (specification), and “10h” in the case of CD-I.

Then, the track number of the last track is recorded in PMIN at the position of "A1h" as the value of POINT, and further, at the position of "A2h" as the value of POINT, the lead-out area of PMIN, PSEC, and PFRAME is respectively recorded. A starting point is indicated. After block n + 27, the contents of blocks n to n + 26 are repeatedly recorded.

In the tracks # 1 to #n on which data such as music is actually recorded on the disk 90 and in the lead-out area, the sub-Q data recorded there is shown in FIG. Have information that First, the track number is recorded. That is, in each of tracks # 1 to #n, “0”
1h "to" 99h ". In the lead-out area, the track number is set to "AAh". Subsequently, information that allows each track to be further subdivided is recorded as an index.

Then, as the elapsed time in the track, MI
N (minute), SEC (second), FRAME (frame number)
Is shown. Furthermore, AMIN, ASEC, AFRAM
As E, the absolute time address is minutes (AMIN), seconds (A
SEC) and the frame number (AFRAME).

As described above, the TOC and the subcode are formed.
It is understood that MIN, ASEC, and AFRAME are recorded in units of 98 frames. This 98 frames (1
Block) is called one subcoding frame, and one second as audio data includes 75 subcoding frames. That is, the possible values of “AFRAME” as an address are “0” to “74”. In the case of a CD, the amount of data recorded on the disk 90 can be obtained from the absolute time address of each track recorded on the disk 90.

3. Next, a configuration example of the lead-in area when the disc 90 is a DVD will be described. FIG. 6 is a schematic diagram showing a configuration example of the lead-in area. As shown in the figure, in the lead-in area, in addition to the data of all “00h”, a reference code (Reference_code) is recorded for two ECC blocks (hereinafter, also simply referred to as a block) from the position of the absolute address “02000h”. 192 blocks of control data (Control_data) are recorded from the position of the absolute address “2F200h”. Note that a block (ECC block) is a unit constituting an error correction block, and is formed by adding an error correction code to, for example, 32 bytes of data. The reference code and control data are used for cutting of a master disc. At the time of writing, and becomes pit data exclusively for reading. In the control data, physical management information of the disk 90 and the like are recorded.

The reference code is provided so that various adjustments in the disk drive device 70, such as a focus position and an equalizer characteristic, can be easily performed. Data. The control data records data indicating physical specifications of the disc, such as a disc type, a disc size, a recording density, the number of information surfaces (one or two layers), and a sector number indicating a data area.

FIG. 7 shows a configuration example of the control data block. Each block of the control data of 192 blocks includes 16 sectors (1 sector = 2048 bytes). Physical format information (Physical_format_information) in the sector with sector number 0
Is recorded. In the sector of sector number 1,
Manufacturing information of the disc 90 (Disc
_Manufacturing_information) is recorded. This is text data or code data that the disc manufacturer may record in a free format. Sector number 2-1
In sector 5, content provider information (Contents
_Provider_infomation) is recorded.

FIG. 8 shows the contents of the physical format information recorded in the sector number 0 together with the byte position (BP) and the number of bytes in the sector. Byte position 0 contains the book type and part version (Book_type_
and_Part_version) is recorded. As the book type, a disc type, for example, a type such as a read-only disc or a rewritable disc is recorded by 4-bit data. Also, as part version, 4
Version information is recorded in bits. In byte position 1, the disc size and minimum readout rate (Disc_size_and_minimum_read-out_rat
e) is recorded. The disc size is an 8 cm disc, a 12 cm disc, and other type information. The disc structure (Disc_structure) is recorded at byte position 2. Here, as shown in FIG. 9, identification of “Single” (one layer) or “Dual” (two layers) as the number of layers (Number_of_Layer), and a track path (Track_pat)
As h), identification of a parallel track or an opposite track, and information as to whether or not an embossed user data area, a recordable user data area, a rewritable user data area, and the like are included as a layer type (Layer_Type) are recorded.

In the byte position 3 shown in FIG. 8, as the information of the recording density (Record_density), a linear density (linear density) and a track density (track pitch) are recorded in four bits. Bite position 4
Data area allocation (Data_area_al
location) information is recorded. FIG. 10 shows the contents of the data area allocation together with the byte position (BP) and the number of bytes in the sector. The byte positions 4, 8, and 12 in FIG. 10 are set to “00h”. Byte positions 5 to 7 are the start sector numbers (Start_sector_number_of_Data_
Area) is recorded. In addition, byte positions 9-1
1 is the end sector number of the data area (End_sector_n
umber_of_Data_Area) is recorded. This indicates the last sector number formed in the data area, that is, the number of sectors formed in the data area.

When the disc is a single layer (Single_layer) or a parallel track path, the byte positions 13 to 15 are set to “000”.
000h ", but if the path is an opportunity track path, the layer 0 forming the opposite track
End sector number (End_sector_number_in_Layer)
0) is recorded. Therefore, the data capacity of layer 0 can be grasped from the end sector number.

In FIG. 8, B is
Information such as a CA descriptor (BCA_discriptor) is recorded, and byte positions 17 to 31 and byte positions 32 to 2047 are reserved.

4. Configuration of Disk FIG. 11 is a schematic diagram showing the configuration of a single-layer disk (single layer), and shows a cross section of the disk 90 in the radial direction. As shown, the lead-in area Rin0 shown in FIG.
Further, a data area is formed. Then, a lead-out area Rout0 is formed following this data area. The data recording direction is a direction (arrow W) from the inner peripheral side to the outer peripheral side. Therefore,
End area number of data area allocation (En
The position corresponding to (d_sector_number_of_Data_Area), that is, the outermost position of the data area is set as the outermost position of the disk 90, and the disk rotation speed is set.

Track paths (parallel track paths, opposite track paths) having a two-layer structure are as shown in the schematic diagrams of FIGS. 12 (a) and 12 (b). FIG. 12A shows the configuration of a parallel track path. As shown in the figure, a signal layer (layer 0, layer 1) having a two-layer structure is formed. Of these, layer 0 has the same configuration as the single-layer disc shown in FIG. That is, the lead-in area Rin1 is formed from the inner peripheral side of the disk 90, and the data area and the lead-out area Rout1 are formed toward the outer peripheral side. Layer 1 has the same configuration as layer 0, and has a lead-in area Rin2, a data area, and a lead-out area R
out2 is formed, and the recording direction is the same. Therefore, the layer 0 end sector (End_L
Assuming that BA) is “n”, the sector “n + 1” following this sector “n” is recorded in the area following the lead-in area Rin2 of layer 1.

The parallel track path configured as described above is a track path suitable for an application having high interactivity in which information of layer 0 and layer 1 are associated with each other.

In the opposite track path shown in FIG. 12B, a lead-in area Rin3 is formed on the layer 0 from the inner circumference side, and a middle area Rmid1 follows the end sector (End_LBA) of the data area.
Is formed. In layer 1, the middle area Rmi
A middle area Rmid2 is formed corresponding to d1, and a data area is formed on the inner peripheral side thereof, and a lead-out area Rout3 is formed following the data area. In the case of such an opposite track pass, the recording directions (arrows W) of layer 0 and layer 1 are reversed. That is, the data recorded in the data area of Layer 0 is the middle area Rmid1, and the middle area Rmid2 of Layer 1 is
Through the data area of Layer 1 to the outer peripheral side. That is, the end sector of layer 0 (En
Assuming that d_LBA) is “n”, the sector “n + 1” following the sector “n” is the head data of the layer 1 data area following the middle area Rmid2. The disc 90 having the opposite track path is suitable for a highly continuous application such as a long movie.

As described above, the discrimination between the single layer shown in FIG. 11 and the dual layer shown in FIG. 12 is indicated in the lead-in area of the disk 90 as described above.

According to the present invention, the logical block address (end sector number) of the data recorded on the outermost periphery of the data area is detected as the data capacity recorded on the disk 90, and the data area of the data area corresponding to this data capacity is detected. At the outermost position, the disk drive 7
The disk 90 is rotated at a speed at which the maximum transfer rate at 0 can be obtained. For example, in the case of the single layer shown in FIG. 11, since recording is performed simply from the inner circumference to the outer circumference, the data capacity (end sector number) and the outermost circumference of the data area correspond to each other. .

However, in the case of the two-layer disc shown in FIG. 12, the data capacity and the outermost circumference of the data area do not always match. In the case of the parallel track path shown in FIG. 12A, the data following layer 0 continues on the inner circumference side of the data area in layer 1, so the end sector (End_LB) of layer 1 as shown in the figure.
It is conceivable that A) is located on the inner circumference side of the end sector (End_LBA) of layer 0. Therefore, in this example, in the case of the parallel track path, each of the end sector numbers (End_sector_numbe) recorded in the lead-in areas Rin1 and Rin2 of Layer 0 and Layer 1 respectively.
(r_of_Data_Area) is compared, and the end sector number of the layer having the larger number of sectors, that is, the layer having the larger capacity is set as the data capacity of the disk 90.

In the case of the opposite track path shown in FIG. 12B, as the data capacity increases, the end sector number (End_LBA) of Layer 1 is located on the inner circumference side. Therefore, the disc 90
In the case where the opposite track path is applied to the end sector number (End_sector_numbe
(r_in_Layer0) is the data capacity of the disk 90.

Therefore, in either case of a single-layer disc or a double-layer disc (parallel track path, opposite track path), the logical block address of the data recorded on the outermost periphery of the data area is determined by the data capacity of the disc 90. I do. Then, assuming that the outermost periphery of the data area is the outermost periphery of the disk 90, the disk drive that sets the maximum transfer rate in the disk drive device 70 is set and the rotation drive is controlled.

By the way, the single layer 1
The maximum number of sectors of a 2 cm disk is, for example, 229492.
0 (230488h). Further, in this example, the outermost periphery of one of the layers is identified in the dual layer, so that the maximum number of sectors which is the maximum is the same. Therefore, the maximum number of sectors detected in this example is a value of 2294920 or less.

FIG. 13 is a diagram showing an example of the title, the number of sectors, and the time of a 12 cm disc of, for example, a single-layer structure on which a movie or the like is recorded. The title "A" indicates that a relatively long movie having a number of sectors of 2281183 and a duration of 133 minutes is recorded. Subsequently, the title “B” has a number of sectors of 1904380 and a time of 107
Minute, the title “C” has 1695823 sectors, the time is 40 minutes, and the title “D” has 9617 sectors.
There are 51 pieces and 30 minutes. Therefore, in the case of a single-layer disc, the end sector number shown in FIG.

FIG. 14 shows a two-layer structure 12c, for example.
m is shown. In the title “E”, sectors from sector number 0 to 1759247 of layer 0 are recorded, and in layer 1, sector number 1759248 is recorded.
Up to 3527935 sectors are recorded. Therefore, the maximum number of sectors for the disk is 3527
In this example, the number of sectors in layer 0 is “1759”.
247 "is the capacity of the disk.

In the title "F", sectors of sector numbers 0 to 1370499 of layer 0 are recorded, and in layer 1, sector numbers 1370500 to 2702172 are recorded.
Up to the sector is recorded. However, in this example, the number of sectors “1370499” in layer 0 is set as the capacity of the disk. Therefore, it can be assumed that a relatively long movie has, for example, more than 2,000,000 sectors formed on a 12 cm disk. Although not shown, for example, the maximum number of sectors of an 8 cm disk is 633683.

Therefore, in this example, the disk 90 is a DVD
In the case of, the criterion capacity is, for example, 2,000,000 sectors,
The setting is made in two stages of 633683 sectors, and the disk rotation speed is controlled in three stages, for example, as shown in FIG. By setting the criterion capacity in two stages, the disk rotation speed corresponding to each criterion capacity can be set in three stages of speed 1 to speed 3, and
Any one of the speeds 1 to 3 is selected based on the detected capacity of the disk 90. However, it is assumed that speed 1 <speed 2 <speed 3 and the smaller the data capacity of the disk 90, the faster it rotates so as to realize the maximum transfer rate in the disk drive device 70 without being affected by the data capacity of the disk 90. I have to.

The relationship between the criterion capacity and the rotational speed is as shown in FIG. This figure is a schematic view showing the disk 90 from the front, and the position on the disk 90 corresponding to the determination reference capacity is indicated by a broken line. For example, when the disk capacity (end sector number) is 2,000,000 sectors or more (e.g., corresponding to the point A), the disk is rotated at the speed 1 and when the disk capacity is 200000 sectors or less and 633683 sectors or more (for example, B (Corresponding to a point) is rotated at speed 2. And 63
If the number of sectors is equal to or less than 3,683 sectors (corresponding to, for example, point C), the motor is rotated at speed 3. Thus, the maximum transfer rate in the disk drive device 70 obtained at the point A can be obtained at the point B or the point C.

5. Rotation Speed Setting FIG. 17 is a flowchart illustrating an example of processing transition from detection of the capacity of the loaded disk 90 to rotation control. First, the disk drive device 70 determines whether or not the disk drive device is in an initial state (Unit Attention Control) (S001). This initial state is, for example, “Power
OnReset, Hard Reset, New Media Insertion, etc.
It proceeds to the subsequent processing steps. When the initial state is detected, disc discrimination is performed (S002). Here, for example, based on various information recorded in the lead-in area, DVD, C
The type of the disc 90 such as D is determined, and a required spin-up (Spin-Up) is performed based on the determination result.
Control is performed (S003). In this case, operation control of the pickup according to the disc type determined in step S002 is performed.

Thereafter, control for rotating the disk 90 at a required rotational speed is performed based on the determination result in step S002. First, it is determined whether or not the disk 90 is a DVD (S004). If it is determined that the disk 90 is a DVD, the process further proceeds to DVD determination processing (S005).

Here, the DVD discriminating process as step S005 will be described with reference to FIG. In the DVD determination process, first, the content of “Number_of_Layer” in the disc structure (Disc_Structure) of the physical format information is determined (S101). If the discrimination result is a single-layer (Single) disc, the end sector number is used as the data capacity (S102).

If the disc is a dual-layer (DUAL) disc, the track path is further determined (S103). If it is determined that the path is a parallel track path, the lead-in areas Rin1 and Rin1 of layer 0 and layer 1
The end sector numbers recorded in in2 are compared, and the one with the larger number of sectors is determined as the data capacity of the disk 90 (S104). If the track path discrimination result is an opposite track path, the end sector number of layer 0 (End_sector_number_in_Layer
0) is set as the data capacity (S105). Thus step S
At 005, the capacity of the data recorded on the disk 90 is detected.

After the DVD discriminating process in step S005,
The process proceeds to step S006 shown in FIG.
A comparison is made between the data capacity detected in 05 and the criterion capacity 1 (2,000,000 sectors) (S006). And
If the data capacity is larger than the criterion capacity 1,
The disk rotation speed 1 is set (S007). If the data capacity is smaller than the criterion capacity 1, the data capacity is compared with the criterion capacity 2 (6333683 sectors) (S008). When the data capacity is larger than the criterion capacity 2, the disk rotation speed 2 is set (S009). If the data capacity is smaller than the criterion capacity 2, the disk rotation speed 3 is set (S010). Thereafter, control for rotating the disk 90 at the disk rotation speed set in this manner is performed (S01).
1).

If it is determined in step S004 that the disc is not a DVD, it is determined whether or not the disc is a CD (S012). Here, if it is determined that it is not a CD,
Disk 9 loaded in the disk drive device 70
Recognizing that “0” is not a CD or DVD, for example, or that the disc 90 is defective, for example, the process shown in this flow is skipped. If it is determined that the CD is a CD, it is determined whether or not the data capacity (absolute time address) of the CD is larger than the criterion capacity 3 (S01).
3). It should be noted that a maximum playing time of, for example, 74 minutes for a 12 cm disc as a CD and a maximum of, for example, 20 minutes for an 8 cm disc (single CD) are possible. Therefore, the criterion capacity 3 may be, for example, a data capacity corresponding to about 40 minutes, and the criterion capacity 4 described below may be, for example, a data capacity corresponding to about 20 minutes.

If it is determined in step S013 that the data capacity is larger than the criterion capacity 3, the disk rotation speed 4 is set (S014). If it is determined that the data capacity is smaller than the criterion capacity 3, it is determined whether the data capacity is larger than the criterion capacity 4 (S015).
If the data capacity is larger than the criterion capacity 4, the disk rotation speed 5 is set (S016). If the data capacity is smaller than the criterion capacity 4, the disk rotation speed 6 is set (S017). Then, step S0
14. In steps S016 and S017, control is performed to rotate the disk 90 at the set disk rotation speed (S011). The disk rotation speeds 4, 5, and 6 correspond to the disk rotation speeds 1 to 3 and are set to 4 <speed 5 <speed 6, and the smaller the data capacity of the disk 90, the faster the disk is rotated. The maximum transfer rate in the disk drive device 70 is realized without being affected by the data capacity of the disk drive 90.

As described above, by setting the rotation speed of the disk 90 according to the data capacity of the disk 90, it is possible to realize the signal processing of the disk drive device 70 even for the disk 90 having a small data capacity. The maximum transfer rate can be obtained.

In the above embodiment, the disk 90
The disk rotation speed is set according to the data capacity of the disk 90. For example, in the case of a DVD, the diameter (12
cm or 8 cm), and the number of rotations corresponding to the detected diameter may be set. Fig. 19 is DVD
9 is a flowchart illustrating an example in which a rotation speed is set according to the disk diameter. It should be noted that the flowchart shown in this figure corresponds to steps S005 to S0 shown in FIG.
It is assumed that it corresponds to 10 processing steps. That is, the disk 90 loaded in the disk drive device 70
If it is determined to be D, the content of "Disc size" in the logical format information is determined (S301).
If it is determined that the disc is a 12 cm disc, the disc rotation speed is set to "L" (S302).
The rotation speed “L” is a standard speed for rotating a 12 cm disk, for example. Step S3
If it is determined that the disc is an 8 cm disc in 01, the disc rotation speed is set to, for example, “L” × 2 (S303). That is, 12c for an 8cm disc
By setting the rotation speed of, for example, about twice the m disk, a higher transfer rate can be obtained.

In FIG. 18, the 8 cm disc is
m, for example, at twice the speed.
As described with reference to FIG. 17, for each of the 12 cm disk and the 8 cm disk, it is also possible to set the rotation speed at which the maximum data transfer rate in the disk drive device 70 for reading data on the outer peripheral side is obtained.

Further, in this example, an example is described in which a disk on which data is recorded in accordance with the CLV method is rotated by the CAV method.
The present invention can also be applied to a case where a disk on which data is recorded by the tial-CAV method is rotated by the CAV method.

[0075]

As described above, according to the present invention, the rotation speed of the disk is set based on the data capacity of the disk, and the data is read out while maintaining the set rotation speed. Therefore, for example, CL
Unlike the V method, there is no need to change the rotation speed according to the position of the pickup, and data reading can be performed while reducing various processing loads. Also, as the rotation speed of the disk based on the data capacity, it is assumed that the maximum data transfer rate in the reproducing apparatus is obtained at the outermost periphery of the recording area. This makes it possible to maximize the transfer capability even for a disk with a small data capacity.

When reading data from a two-layer disc to which a parallel track path is applied, the end sector number (logical block address) of the lead-in area corresponding to each recording surface formed on each layer is compared. The end sector number closer to the outer periphery of the disk is detected as the data capacity. Therefore, even when the data volume recorded on the recording surface of each layer is different, the outermost periphery of the recording area can be detected.

Further, the rotation speed of the disk is set based on the diameter of the disk, and data is read out while maintaining the set rotation speed. Also in this case, since the rotation speed of the disk can be kept constant, data reading can be performed while reducing various processing loads. Further, the maximum data transfer rate can be obtained even for a small disk having a diameter of, for example, 8 cm.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a disk drive device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a frame structure of a disc (CD).

FIG. 3 is an explanatory diagram of subcoding of a disc (CD).

FIG. 4 is an explanatory diagram of sub-Q data of a disk (CD).

FIG. 5 is an explanatory diagram of TOC data of a disk (CD).

FIG. 6 is an explanatory diagram of a lead-in area of a disk (DVD).

FIG. 7 is an explanatory diagram of control data in a lead-in area shown in FIG. 6;

FIG. 8 is an explanatory diagram of physical format information of control data shown in FIG. 7;

FIG. 9 is an explanatory diagram of disc structure information in physical format information.

FIG. 10 is an explanatory diagram of data area allocation information in physical format information.

FIG. 11 is a schematic diagram illustrating the configuration of a single-layer disc.

FIG. 12 is a schematic diagram illustrating the configuration of a two-layer disc.

FIG. 13 is a diagram illustrating an example of the number of sectors of a single-layer disc.

FIG. 14 is a diagram illustrating an example of the number of sectors of a two-layer disc.

FIG. 15 is a diagram illustrating a relationship between a determination reference capacity and a disk rotation speed.

FIG. 16 is a diagram for explaining a relationship between a determination reference capacity and a disk rotation speed.

FIG. 17 is a diagram for explaining a process when setting a disk rotation speed based on a determination reference capacity;

FIG. 18 is a diagram illustrating a discrimination process of a two-layer disc in a DVD.

FIG. 19 is a diagram for explaining a process in the case where the disk rotation speed is set based on the diameter of the disk.

[Explanation of symbols]

1 pickup, 9 RF amplifier, 10 system controller, 12 decoder, 14 servo processor, 21 FG, 22 memory, 70 playback device, 90
disk

Claims (5)

[Claims] 1. A reproducing apparatus capable of reproducing a disk on which data is recorded at a constant linear velocity, comprising: a disk rotating means capable of rotating the loaded disk at a constant angular velocity; Capacity detecting means for detecting, from the management information area of the disc, a logical block address of data recorded on the outermost periphery of the data area in which the disc is recorded, as the data capacity recorded on the disc; And a control means for controlling the disk rotating means based on the data capacity detected in the step (a), and for controlling the disk to rotate at a predetermined number of revolutions. 2. The control means according to claim 1, wherein said control means controls said disk so that data recorded on an outermost periphery can be read out at a maximum transfer rate in said reproducing apparatus, based on a data capacity detected by said capacity detection means. 2. The reproducing apparatus according to claim 1, wherein the rotating means is controlled. 3. A disk structure identifying means for identifying a structure of a recording surface of the disk from a management information area of the disk, wherein the disk has a double-layered recording surface by the disk structure identifying means. And that the recording directions of the first recording surface formed on the first layer and the second recording surface formed on the second layer are the same as the radial direction of the disc. In this case, the capacity detection means compares the logical block addresses of the data recorded on the outermost circumferences of the first and second recording surfaces, and determines the logical block address closer to the outer circumference of the disc as the data capacity. 2. The reproducing apparatus according to claim 1, wherein: 4. A reproducing apparatus capable of reproducing a disk on which data is recorded so as to have a constant linear velocity, comprising: a disk rotating means capable of rotating the loaded disk at a constant angular velocity; Disk diameter information detecting means for detecting the diameter information of the disk from the management information area of the disk; controlling the disk rotating means based on the disk diameter information detected by the disk diameter information detecting means; A playback device, comprising: control means for controlling rotation at a rotation speed. 5. The controller according to claim 1, wherein the data recorded on the outermost periphery can be read out at a maximum transfer rate in the reproducing apparatus based on the disk diameter information detected by the disk diameter information detector. 5. The reproducing apparatus according to claim 4, wherein said disc rotating means is controlled.