KR100636171B1 - Method for controlling recording/reproducing in host computer, host computer therefore, recording/reproducing method and recording/reproducing apparatus - Google Patents

Abstract

Disclosed are a recording / playback control method, a host device, a recording / playback method, and a recording / playback device in a host device for controlling a recording / playback device according to the present invention.

A recording / reproducing control method in a host device for controlling a recording / reproducing apparatus according to the present invention includes a method of comparing a reproduction speed supported by an information storage medium with a reproduction speed required by an application that controls reproduction of data recorded on the medium. And controlling the recording / reproducing apparatus to record or reproduce data recorded on the medium when the reproduction speed supported by the medium is higher than the reproduction speed required by the application. According to the present invention as described above, it is possible to realize stable real-time reproduction by preventing any reduction in the reproduction speed in an application for reproducing high-speed AV data where reproduction at high speed is important.

Description

Method for controlling recording / reproducing in host computer, host computer therefore, recording / reproducing method and recording / reproducing apparatus}

1 is a reference diagram for explaining a problem of disc reproduction according to the prior art;

2 is a structural diagram of a disk according to the present invention;

3 is an example of the reproduction speed information shown in FIG. 2;

4 is an example of a recording / reproducing apparatus according to the present invention;

5 is an example of a host device according to the present invention;

6 is a flow chart illustrating a process of a method for controlling recording / reproduction in accordance with the present invention.

TECHNICAL FIELD The present invention relates to the field of discs, and more particularly, to a recording / playback control method in a host device that controls a recording / playback device to prevent any playback speed drop for data that is important to play at high speed. A host device, a recording / reproducing method, and a recording / reproducing device.

In general, an optical disk is widely used as an information recording medium of an optical pickup apparatus for recording / reproducing information in a non-contact manner, and is used as a compact disk (CD) or a digital versatile disk (DVD) according to the information recording capacity. Are distinguished. In addition, optical discs that can be recorded, erased, and played back include 650MB CD-R, CD-RW, 4.7GB DVD-RW, DVD-R, DVD-RAM, etc. Etc. Furthermore, high-density discs using a blue-violet laser with a recording capacity of 25GB or more are also being developed.

In order to unify the physical structure, data structure, and recording / reproducing method of these various types of storage media, standards are established. The contents of the storage medium are numerous, and the recording capacity and the recording speed may be important. For example, there are many recording / reproducing conditions required to increase the recording capacity. When the recording / reproducing conditions are different from those specified in the existing standard, the standard version number is changed as the standard is changed.

In general, a disk drive applies a double speed to a disk format for a request command transmitted from a host computer. That is, when a disc is inserted, the disc drive is a CD-ROM, a video CD, a digital audio CD (CD-DA), or a DVD disc based on the playlist information recorded in the lead-in area of the disc. A disc type such as recognition is discriminated, and a reproduction speed of the disc is set for the disc drive according to the determined result. When the request command is received from the host computer, the disk drive is driven at the set high speed. For example, even when a command is received from the host computer requesting playback at a 3X speed, the disc drive performs playback at a speed set according to the disc format.

1 is a reference diagram for explaining a problem of disc reproduction according to the prior art.

Even a drive system according to one standard can use a disk of various speeds. For example, various speeds may be used for a version 1.0 disk used in the version 1.0 drive system 100. For example, as shown in FIG. 1, a disk 110 capable of only 1x speed, a disk 120 capable of 1x speed and 2x speed, and a disk 130 capable of 1x, 2x, and 4x speed are assumed.

At this time, the host computer 140 sends a command to the drive system 100 to play the file at 4 times speed in order to execute the application program for playing the high speed AV data. Then, when the loaded disc is a disc 130 capable of 1x, 2x, and 2x speeds, the 4x speed is set in the disc format, so that the drive system 100 plays the AV data played back at 4x speed to the host computer. Will be able to send. However, for example, when a disc 110 capable of only 1x speed or a disc 120 capable of 1x and 2x speed is loaded, the drive system 100 receives a 4x playback command from the host computer 140. However, since the 1x and 2x speeds of the maximum speed on the disk do not reach 4x speed, the AV data is played back to the host computer 100 at the speed set on the disk, that is, 1x speed or 2x speed regardless of the command of the host computer. Will be sent. Therefore, even when the host computer 100 receives the AV data at the 4x speed, the host computer 100 can not only receive the AV data at the playback speed arbitrarily set by the drive system 100, so that the host computer 100 provides stable real time playback. Will fail.

In this way, the existing media such as DVD-R, RW, RAM, ROM, etc. are recorded in accordance with the high-speed recording regulations, but the playback is performed by the method of the manufacturer of each device, even at the same speed There is a case where an isometric speed regeneration method is sometimes selected, and different regeneration methods are freely applied as in the case of adopting an isotropic speed regeneration method. In addition, when the playback is not performed properly at a high playback speed, there is no precise regulation on the playback speed, such as a change in the playback speed at the discretion of the playback apparatus.

In addition, in systems such as computers, devices for reproducing and recording discs and application programs for processing read data belong to different devices, and the interface between the two devices is often through standardized regulations such as ATAPI.

In this case, it is possible to set the playback speed in the host computer, but there is no way to know whether the disc has the playback capacity suitable for the desired playback speed. Also, the playback device can also specify the playback speed through the ATAPI interface. There is no provision for whether the speed must be kept or must be kept within the range of reproducibility. Therefore, when an error occurs that the desired data cannot be read at the corresponding speed, the playback speed may be lowered depending on the playback device, and even if the speed is set at the same speed, the playback data transfer rate varies depending on the reading position. In some cases, there is a problem in that the data rate required by the host application is not guaranteed.

That is, in current devices, only 1X is defined in the standard, and high speed playback is dependent on the drive's reproducibility. The minimum playback speed required for playback, such as high-speed AV, must be observed, and it is necessary to strictly define the various specifications of the disc in order to sufficiently lower the characteristics during playback of the medium, for example, noise at high-speed playback due to disc imbalance. have.

SUMMARY OF THE INVENTION The present invention provides a recording / playback control method in a host device which can realize stable real-time playback by preventing any playback speed drop in an application that plays back high-speed AV data in which high-speed playback is important by solving the above problems. An object thereof is to provide a host device, a recording / reproducing method, and a recording / reproducing device.

One feature of the present invention for solving the above problems is a recording / playback control method in a host device that controls a recording / playback device, the playback speed supported by an information storage medium and the data recorded on the medium. Comparing the reproduction speeds required by the application to control the reproduction; and recording or reproducing the data recorded on the medium when the reproduction speed supported by the medium is higher than the reproduction speed required by the application. To control the step.

Preferably, the comparing step includes requesting the recording / reproducing apparatus to read the information on the reproduction speed recorded on the medium, and receiving the information on the reproduction speed from the recording / reproducing apparatus. .

The method may further include notifying the application that data is not recorded or reproduced when the reproduction speed supported by the medium is lower than the reproduction speed required by the application.

Another aspect of the present invention provides a host device for controlling a recording / reproducing apparatus, comprising: comparing a reproducing speed supported by an information storage medium with a reproducing speed required by an application for reproducing and controlling data recorded on the medium; And a control unit for controlling the recording / reproducing apparatus to record or reproduce the data recorded on the medium when the reproduction speed supported by the application is higher than the reproduction speed required by the application.

Preferably, the control unit requests the recording / reproducing apparatus to read the information on the reproduction speed recorded on the medium for the comparison, and receives the information on the reproduction speed from the recording / reproducing apparatus.

Preferably, the control unit further notifies the application that data cannot be recorded or reproduced when the reproduction speed supported by the medium is lower than the reproduction speed required by the application.

According to still another aspect of the present invention, there is provided a recording / reproducing method, the method comprising: receiving a command of a host computer requesting reproduction speed information supported by an information storage medium, and reading reproduction speed information recorded on the medium to read the host; Transmitting a recording / reproducing command from the host computer when the reproducing speed supported by the computer is higher than the reproducing speed required by an application for reproducing and controlling the data recorded on the medium. Recording or reproducing data from the medium.

According to still another aspect of the present invention, there is provided a recording / reproducing apparatus, comprising: a recording / reading unit for recording data to or reading data from an information storage medium, and a host computer for requesting reproduction speed information supported by the medium. A playback speed required by an application to control playback of the playback speed information recorded on the medium by reading a command, and to read and transmit the playback speed information recorded on the medium to the host computer. And a controller which controls to record or reproduce data by receiving a command for recording data from the host computer or reproducing data from the medium when the data is higher.

The present invention will now be described in detail with reference to the accompanying drawings.

2 is a structural diagram of a disk to which the present invention is applied.

Referring to FIG. 2, a lead-in area 210 is provided at the innermost circumference of the disc 200, a lead-out area 230 is provided at the outermost circumference, and user data is provided between the lead-in area and the lead-out area. A user data area 220 to be recorded is provided.

The lead-in area 210 is composed of a pre-recorded zone 240 and a recordable area 250 in which predetermined information has already been recorded when the disc is manufactured.

The recordable area 250 is configured to record information about a defect such as a buffer 251 serving as a buffer between the pre-recorded area and the recordable area, and an address of replacement data that replaces the defect data generated in the user data area. A defect management area 252, a test area 253 provided for performing inspection to obtain an optimal recording power when recording data in the user data area, and information for recording information relating to a drive or disk status Drive / disk status information area 254 is included.

The pre-recorded area 240 includes a control data area 241 in which control data is recorded, and includes disc type and version information 242, disc size 243, disc structure 244, recording speed 245, Information relating to the recording parameters 246 and the like, and further includes information relating to the reproduction speed 247 according to the present invention.

As described above, by recording the information on the playback speed applied to the disk on the disk, the drive system can read the information on the playback speed recorded on the disk and transmit it to the host at the request of the host. The host can determine whether to play high-speed AV data whose playback speed is important by referring to the playback speed of such a disc.

Information on the reproduction speed as described above is recorded in the control data area of the disc, and these disc information structures are recorded beforehand when the medium is manufactured. For example, it may be recorded in a pre-recorded area of the lead-in area as shown in FIG. However, this is merely an example, and any area can be used as long as it can contain a disc information structure in a future disc.

An example of the form of the information regarding the reproduction speed is shown in FIG.

Referring to (a) of FIG. 3, the information 247 field regarding the reproduction speed is composed of one byte and may indicate the reproduction speed information using the lower four bits of one byte. The remaining 4 bits are reserved.

Referring to (b) of FIG. 3, the playback speed may be represented as "0000" in the case of 1x speed, that is, the basic speed, and in the case of 2x speed, "0001" may be represented. In the same manner, referring to (d), it can be represented by " 1111 "

The reason why the 1x speed is set to "0000" is that in the case of a disc which does not have such information so far, the reproduction information area has all the data of "0000" as a reserved area which is not used, and the 1x speed is set to "0000". By setting, the existing playback speed is compatible with the disc defined only at the basic speed such as 1x speed. In addition, if the basic speed is not 1x, for example, a 4.7GB disk defined in the DVD-RAM specification version 2.0, the basic speed is 2x, and in this case, the existing disk is defined by defining the value of "0000" as 2x. It has the advantage of maintaining compatibility with.

Now, an example of an apparatus for recording data on a disk on which information on the reproduction speed is recorded and reproducing data from the disk according to the present invention will be described with reference to FIG.

4 shows an example of a recording / reproducing apparatus according to the present invention.

Referring to FIG. 4, the recording / reproducing apparatus includes a recording / reading unit 460 and a control unit 400.

The recording / reading unit 460 is provided with a pickup and the like to record data on the disc 200, which is an optical recording information storage medium on which information on a reproduction speed according to the present invention is recorded, and records the data recorded on the disc 200. Read out.

The controller 400 controls the recording / reading unit 460 to record and read data on the disc 200 according to a predetermined file system. In particular, the control unit 400 according to the present invention controls the recording / reading unit 460 to read information about the reproduction speed from the disc 200 when the disc 200 is loaded. To the host computer 500.

When the host computer 500 plays back the high speed AV data, the host computer 500 sends a command to the drive system requesting the play speed information to confirm whether the disc loaded in the disc drive system can be played at the high speed, and from the drive system. When information about the playback speed is received, it is compared with the high speed required by the application to determine whether to play or not. This will be described in detail with reference to FIG. 5.

The controller 400 includes a system controller 410, a host I / F 420, a DSP 430, an RF AMP 440, and a servo 450.

In writing, the host I / F 420 receives a predetermined write command from the host computer 500 and sends it to the system controller 410. The system controller 410 controls the DSP 430 and the servo 450 to perform the write command received from the host I / F 420. The DSP 430 adds additional data such as parity for error correction to the data to be recorded received from the host I / F 420 and performs ECC encoding to generate an ECC block, which is an error correction block, in a predetermined manner. Modulate. The RF AMP 440 converts the data output from the DSP 430 into an RF signal. The recording / reading unit 460 having the pickup records the RF signal transmitted from the RF AMP 440 on the disc 200. The servo 450 receives a command necessary for servo control from the system controller 410 to servo control the pickup of the recording / reading unit 460.

During playback, the host I / F 420 receives a playback command from the host. In particular, according to the present invention, the host I / F 420 receives a command to read the information on the playback speed from the host computer 500 and transmits it to the system controller 410, which reads from the disk 200. Information about the reproduction speed is transmitted to the host 500. The system controller 410 performs initialization necessary for regeneration. The recording / reading unit 460 irradiates a laser beam to the disk 200 and outputs an optical signal obtained by receiving the laser beam reflected from the disk 200. The RF AMP 440 converts an optical signal output from the recording / reading unit 460 into an RF signal and provides modulated data obtained from the RF signal to the DSP 430, while providing a servo signal for control obtained from the RF signal. Servo 450 is provided. The DSP 430 demodulates the modulated data and outputs data obtained through ECC error correction. On the other hand, the servo 450 receives the servo signal received from the RF AMP 440 and the command required for the servo control received from the system controller 410 to perform servo control for the pickup. The host I / F 420 sends data received from the DSP 430 to the host. In particular, the system controller 410 according to the present invention, the recording / reading unit 460 to read the information about the playback speed 247 from the control data area 241 provided in the lead-in area 210 of the disk 200 And control the host I / F 420 to send it to the host computer 500.

The recording / reproducing apparatus shown in FIG. 4 may be implemented as a separate recording apparatus, a reproducing apparatus, or may be implemented as one recording and reproducing apparatus.

5, a schematic configuration of a host computer 500 will now be described.

The host computer 500 includes an interface 510 for data transmission and reception with a drive system, a controller 520 for controlling each component of the host computer, an application program 530 for controlling playback of high-speed AV data, and The display unit 540 displays high-speed AV data.

The controller 520 according to the present invention first checks whether the application program is an application program that requires high-speed recording or reproduction when the AV data is to be played back by activating a predetermined application program. If high speed recording or reproducing is not required, an operation of recording or reproducing AV data or the like by controlling the remaining drive system may be performed by a general process. In the case of an application program requiring high-speed recording or reproducing, the control unit 520 transmits a command for requesting information about a playing speed of a disc loaded into the drive system through the interface 510, and in response thereto, the interface 510. Information on the playback speed of the disc is received.

Then, the control unit 520 compares the playback speed of the disk with the playback speed required by the application program, and when the playback speed of the disk is higher than the playback speed required by the application program to satisfy the requirements of the application program, the drive system. Then, a command for requesting playback of the AV data recorded on the disk or a command requesting the recording of AV data on the disk is transmitted to start playback or recording of the AV data. However, if the playback speed of the disc does not meet the playback speed required by the application program and the requirements of the application program cannot be satisfied, the application program 530 notifies that recording or playback is not possible.

The process of the recording / reproducing method according to the present invention will now be described with reference to FIG.

Referring to FIG. 6, if a host wants to reproduce AV data by a predetermined application program, first, it is checked whether the application program is an application program requiring high-speed recording or reproduction (610). If it is not an application program requiring high-speed recording or reproducing, the data reproducing operation is performed in the same general process as the existing process (620). That is, by separately requesting the playback speed of the disc, it confirms this and does not decide whether to play it. Instead, it simply sends a playback command to the drive system.

Next, in the case of an application program requiring high-speed recording or reproducing, the host requests information on the maximum reproduction speed of the disc from the drive system (630). Upon receiving this request, the drive system reads the information about the playback speed recorded in the lead-in area of the disk and sends it to the host.

The host then checks the maximum playback speed of the disk received from the drive system (640). The maximum reproduction speed is because information on the reproduction speed in the lead-in area of the disc generally records the maximum reproduction speed among the reproduction speeds supported by the disc.

The host compares the maximum playback speed of the received disk with the playback speed required by the application for fast recording or playback (650), and if the maximum playback speed of the disk is larger, then the drive system writes the speed required by the application. Or command to record or reproduce at the reproduction speed (660).

If the playback speed required by the application program for faster recording or playback is greater than the disc's maximum playback speed, the host cannot record or play back with the application because the disk cannot satisfy the application's requirements. In step 670, the notification is made. Even in the case of the recording operation, the playback speed is checked because playback compatibility is lost even if recording is possible even if recording is performed at a high speed even if recording is not supported. That is, it is meaningful to record at high speed only when the playback speed is supported.

In addition, the command of the host for setting the reproduction speed of the drive may be used by using a new command different from the existing command or by adding a new condition to the existing command. By separating the host command that sets the playback speed of the drive from the existing command, it is possible to distinguish between the playback speed that must be observed and the case where the drive can slow down the playback speed if necessary. Can be compatible with.

The above-described recording method or reproducing method can also be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the recording / reproducing method can be easily inferred by programmers in the art to which the present invention belongs.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention as described above, it is possible to prevent any reduction in the playback speed, which is a problem of the existing drive, for an application requiring a high data transfer rate of a certain level or more, such as a playback operation of real-time data, thereby providing stable real time. Playback can be realized.

Claims (8)

A recording / playback control method in a host device that controls a recording / playback device, Comparing the reproduction speed supported by the information storage medium loaded in the recording / reproducing apparatus with the reproduction speed required by the application program to use the data recorded on the medium; Controlling the recording / reproducing apparatus to reproduce the data recorded on the medium or to record the data on the medium when the reproduction speed supported by the medium is higher than the reproduction speed required by the application program. A recording / playback control method characterized by the above-mentioned. The method of claim 1, The comparing step, Requesting the recording / reproducing device to read the information on the reproduction speed recorded on the medium, and receiving information on the reproduction speed from the recording / reproducing device. Way. The method of claim 1, And notifying the application that recording or reproducing of data is impossible when the reproduction speed supported by the medium is lower than the reproduction speed required by the application program. A host device for controlling a recording / reproducing device, When the playback speed supported by the information storage medium and the playback speed required by the application program to use the data recorded on the medium are compared, and the playback speed supported by the medium is higher than the playback speed required by the application program. And a control unit for controlling the recording / reproducing apparatus to reproduce the data recorded on the medium or to record the data on the medium. The method of claim 4, wherein The control unit, Requesting the recording / reproducing device to read the information on the reproduction speed recorded on the medium for the comparison, and receiving the information on the reproduction speed from the recording / reproducing device. Device. The method of claim 4, wherein The control unit, And when the reproduction speed supported by the medium is lower than the reproduction speed required by the application program, notifying that the application program cannot record or reproduce data. In the recording / playback method, Receiving a command from a host computer requesting playback speed information supported by the information storage medium; Reading reproduction speed information recorded on the medium and transmitting the read rate information to the host computer; When the reproduction speed supported by the medium is higher than the reproduction speed required by an application program to use to reproduce data recorded on the medium, a recording / playback command is received from the host computer to record data on the medium or from the medium. And reproducing the data. In the recording / reproducing apparatus, A recording / reading unit which records data on or reads data from the information storage medium; Receives a command from the host computer requesting the reproduction speed information supported by the medium, controls to read the reproduction speed information recorded on the medium, and transmits the reproduction speed information to the host computer, and the reproduction speed supported by the medium is transferred to the medium. And a control unit for controlling recording or reproducing by receiving a command for recording data on the medium or reproducing data from the medium when the recorded data is higher than a reproduction speed required by the application program to use the recorded data. Recording / reproducing apparatus.

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