JP2002279636A - Recording control method for optical disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording control method of an optical disk recording and reproducing device capable of recording signals on a disk by a laser emitted from an optical pickup. SOLUTION: In the optical disk recording and reproducing device, a recording operation state by a first constant linear velocity is switched to the state of performing a recording operation by a second constant linear velocity when a recording position is moved to a prescribed position on the disk. A recording end position is recognized on the basis of a recording start position and the data amount of the signals to be recorded before starting recording and the switching operation from the recording operation by the first constant linear velocity to the state of performing the recording operation by the second constant linear velocity is selectively controlled on the basis of the recording end position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording / reproducing apparatus configured to record a signal on a disk by a laser radiated from an optical pickup and to reproduce a signal recorded on the disk by the laser. About.

[0002]

2. Description of the Related Art An optical disk recording / reproducing apparatus for reading out a signal recorded on a disk using an optical pickup has become widespread. Recently, in addition to a reproducing function, a laser irradiated from the optical pickup has been used. An optical disk recording / reproducing apparatus configured to record signals on a disk has been commercialized.

In recent years, it has been difficult to record a signal while controlling the rotation of the disk at a constant linear speed of 4 times, 8 times, 10 times, 12 times, etc. with respect to a specified recording linear speed. An optical disk recording / reproducing device configured to be capable of being developed has been developed.

[0004]

When a recording operation is performed at a constant linear velocity, the rotational speed of the disk, that is, the angular velocity is higher on the inner peripheral side of the disk than on the outer peripheral side, so that the recording position is on the inner peripheral side. In such a case, it is necessary to increase the rotation speed of the spindle motor for rotating the disk.
However, a spindle motor capable of rotating at high speed is not only expensive but also makes it very difficult to perform an accurate speed control operation, so that the recording speed on a disc is limited by the linear velocity on the inner peripheral side. Become. As a technique for solving such a problem, a technique has been developed in which the linear velocity for performing the recording operation on the outer peripheral side is higher than the linear velocity for performing the recording operation at the inner peripheral position.

An object of the present invention is to provide a recording control method suitable for an optical disk recording / reproducing apparatus employing such a method.

[0006]

The present invention provides a recording operation at a constant first linear velocity in the entire signal recording area and a constant second linear velocity faster than the first linear velocity in an area on the outer peripheral side of a predetermined position in the signal recording area. The recording operation can be performed, and when the recording position moves to the predetermined position, it is possible to switch from the recording operation state at the first constant linear velocity to the recording operation at the second constant linear velocity. In an optical disk recording / reproducing apparatus configured so as to be able to recognize a recording end position before starting recording based on a recording start position and a data amount of a signal to be recorded, and perform a recording operation at a constant first linear velocity based on the recording end position. The switching operation from the control to the state in which the recording operation is performed at the second constant linear velocity is selectively controlled.

[0007]

FIG. 1 is a flowchart showing a recording control method according to the present invention, and FIG. 2 is a block circuit diagram showing one embodiment of an optical disk recording / reproducing apparatus according to the present invention.

In FIG. 2, 1 is a spindle motor M
The disk is mounted on a turntable (not shown) that is driven to rotate by the rotary table, and is configured to be driven to rotate by rotation of the turntable. Also. Position information data is recorded on the disc 1 by a groove called a wobble, and a signal recording / reproducing operation is performed based on a wobble signal obtained from the groove. Reference numeral 2 denotes a laser diode for irradiating the disk 1 with a light beam and a monitoring diode for monitoring light emitted from the laser diode, and a photodetector for receiving the light beam reflected from the signal surface of the disk 1. The optical pickup is incorporated therein, and is configured to be moved in the radial direction of the disc 1 by a pickup feed motor (not shown).

Reference numeral 3 denotes an RF signal amplifying circuit for amplifying an RF signal obtained from a photodetector incorporated in the optical pickup 2 and shaping the waveform, and 4 denotes a signal obtained via the RF signal amplifying circuit 3. A pickup control circuit for performing a focusing control operation for focusing a light beam of the optical pickup 2 on a signal surface of the disk 1 and a tracking control operation for causing the light beam to follow a signal track on the signal surface based on the focus servo. A circuit and a tracking servo circuit are incorporated.

Reference numeral 5 denotes a digital signal processing circuit which performs digital signal processing of signals output from the RF signal amplifier circuit 3 and performs demodulation operations of various signals, and 6 denotes a digital signal processed by the digital signal processing circuit 5. A signal reproducing circuit to which a signal is input. When the information recorded on the disc 1 is an audio signal, the signal is converted into an analog signal and then output to an amplifier or the like, and when the data signal is data such as computer software. Has the function of outputting the digital signal as it is to the computer device 7 provided as a host.

Reference numeral 8 denotes a system control circuit which receives a signal demodulated by the digital signal processing circuit 5 and performs various control operations in accordance with a command signal output from the computer device 7. Reference numeral 9 denotes a recording signal, such as a test signal or an information signal, which is input and controls a laser irradiation operation by a laser driving circuit (not shown) in accordance with the signal, thereby recording a data signal or the like on the disk 1. This is a signal recording circuit.

Reference numeral 10 denotes a buffer RAM in which a signal recorded on the disk 1 is temporarily stored, in which a signal output from the computer device 7 is written, and a signal writing operation and a reading operation by a control operation of the system control circuit 8. The operation is configured to be controlled. Reference numeral 11 denotes a spindle motor drive circuit whose operation is controlled by the system control circuit 8,
Has the function of rotationally controlling the spindle motor M for rotationally driving the spindle motor M. The rotation drive operation by the spindle motor drive circuit 11 can perform a drive control operation at a constant first linear velocity over the entire signal recording area of the disk 1, and can be performed on the outer peripheral side from a predetermined position of the signal recording area. The drive control operation can be performed at a constant second linear velocity higher than the first linear velocity in the region.

In such a configuration, during a signal recording operation on the disk 1, a signal output from the computer device 7 is stored in the buffer RAM 10, and a read operation of the stored signal is controlled to control the disk. 1 is configured to control the operation of recording a signal into the first signal. Further, when the rotation control operation of the disk 1 is performed at a constant linear velocity, the control operation of each circuit for performing the recording operation is performed according to the recording speed.

When the recording position moves to a position where the recording operation can be performed at the second constant linear velocity during the recording operation, the recording speed is changed from the first constant linear velocity to the second constant linear velocity. The operation of switching the recording linear speed is performed. In the operation of switching the recording linear velocity, after the operation of recording a signal on the disk 1 is interrupted, the operation of switching the rotational speed of the disk 1 is performed and the rotational speed is changed to a predetermined linear speed. The configuration is such that the recording operation on the disk 1 is restarted when it is in a state of being driven to rotate at the speed. Techniques for continuously recording signals on the disc 1 by such a recording suspension / resumption operation are well known, and a description thereof will be omitted.

As described above, the optical disk recording / reproducing apparatus according to the present invention is configured. Next, the reproducing operation in the circuit configured as described above will be described. A system control circuit 8 that constitutes a drive device from a computer device 7
When a command signal for performing a reproducing operation is output to the system controller 8, a control operation for the reproducing operation by the system control circuit 8 is started. When such a reproducing operation is performed, the laser diode incorporated in the optical pickup 2 is supplied with a driving current for obtaining a laser output for performing a signal reading operation from a laser driving circuit. Is set.

When the control operation for such a reproduction operation is started, the rotation control operation of the spindle motor M by the spindle motor drive circuit 11 is performed. The disk 1 is rotated at a constant linear velocity by comparing a synchronization signal obtained by decoding with a reference signal output from a reference signal generation circuit (not shown). Such a control operation is similarly performed at the time of a signal recording operation described later.

The rotation control operation of the spindle motor M is as follows.
As described above, in the optical pickup 2 performing the signal reading operation, the focusing control operation and the tracking control operation are started, and the signal reading operation from the disk 1 by the optical pickup 2 is started. Prior to the reproduction operation, the TOC recorded in the lead-in area constituting the first session of the disc 1
A data read operation is performed.

The operation of reading and reproducing signals recorded in the signal recording area of the first session provided on the disc 1 is performed based on the TOC data recorded in the lead-in area. The signal read by the optical pickup 2 is amplified and shaped by an RF signal amplifying circuit 3 and then input to a digital signal processing circuit 5 where the signal is demodulated. When signal processing is performed by the digital signal processing circuit 5 to extract information data, the information data is applied to a signal reproduction circuit 6 after signal processing such as error correction is performed.

When the information data read from the disk 1 is an audio signal, the signal reproducing circuit 6 converts the information data into an analog signal and outputs the analog signal to an amplifier or the like. In this case, the digital signal is output to the computer 7 as it is.

As described above, the reproducing operation in this embodiment is performed. Next, the operation of recording a signal on the disk 1 will be described.

The operation of recording a signal on the disk 1 is performed by first recording and reproducing a test signal in a test writing area provided on the disk 1 so that a drive current for obtaining a laser output optimal for the recording operation is supplied to the laser diode. Set to be supplied. When such a laser output setting operation is performed, an operation of reading out information data recorded in an area called a buffer of the disk 1, that is, position information of a signal recorded in a signal recording area is performed.

Based on the information data read in this manner, whether a data signal recording operation can be performed in a signal recording area provided on the disk 1 and the position at which the recording operation is performed are determined. A recognition operation is performed.

When the recognition processing operation is completed, the optical pickup 2 is moved to a position where the recording operation on the disk 1 is started, and the recording signal is written into the buffer RAM 10. RA for the buffer
When the operation of writing a signal to M10 is performed, the storage amount of the signal stored in the buffer RAM 10 gradually increases. When the storage amount exceeds a predetermined amount, the signal stored in the buffer RAM 10 is read, and the read signal is input to the signal recording circuit 9. As a result, the control operation of the laser drive circuit by the signal recording circuit 9 is performed, and a signal is recorded on the disk 1.

The signal recording operation to the disk 1 is performed by such an operation, but the signal writing operation to the buffer RAM 10 is performed as a normal operation.
It is configured to be performed in response to a signal read operation from the AM 10. In the operation of writing a signal to the buffer RAM 10, when a signal read operation is performed, an operation of newly writing a signal at a position where the read signal is stored is repeatedly performed.

When the recording position moves to a position where the recording operation at the second constant linear velocity can be performed during the recording operation at the first constant linear velocity, the recording operation is temporarily interrupted, and The rotation speed is switched to the second constant linear velocity state, and when the rotation state is stabilized, the operation of restarting the recording operation at the second constant linear velocity is performed. Whether or not to perform the switching operation of the recording speed can of course be freely selected and set in advance by the user.

The normal recording operation is performed as described above. Next, the recording control method according to the present invention will be described with reference to the flowchart shown in FIG.

When the control operation for starting the recording operation is started, first, the recording start position on the disk 1 is recognized (step A). When the recording start position is recognized,
It is determined whether or not the recognized recording start position is a position where a recording operation can be performed at the second constant linear velocity (step B). If it is determined in step B that the recording start position is a position where the recording operation can be performed at the second constant linear velocity, the optical pickup 2 is moved to the recording start position and the rotation speed of the disk 1 is controlled. Is performed so that the second linear velocity becomes constant, and the recording operation of the signal is started. When the recording operation of all the signals is completed, the recording operation is completed (step C).

In step B, if the recording start position is the second
If it is determined that the position cannot perform the recording operation at a constant linear velocity, the data amount of the recording signal is recognized from the signal output from the computer device 7, and the data amount and the data amount are recognized in step A. The recording end position is recognized from the recorded recording start position (step D). Step D
When the recording end position is recognized at, it is determined whether or not the recognized recording end position is a position where a recording operation can be performed at the second constant linear velocity (step E). In step E, when it is determined that the recording end position is a position where the recording operation cannot be performed at the second constant linear velocity, the optical pickup 2 is moved to the recording start position and the rotation speed of the disk 1 is changed. The signal recording operation is started by controlling the first linear velocity to be constant, and the recording operation is completed when the recording operation of all the signals is completed (step F).

In step E, the recording end position is set to the second
If it is determined that the recording operation can be performed at a constant linear velocity, it is determined whether the recording end position is a predetermined position or more on the outer peripheral side from the recording operation start position at the second linear velocity. Is performed (step G). The predetermined position is a position at which the recording operation can be shortened by performing the recording operation by switching the recording speed from the first constant linear speed to the second constant linear speed by performing the interruption / resuming operation of the recording operation. is there.

In step G, the recording end position is the second
If it is determined that the recording operation at the constant linear velocity is not more than a predetermined position on the outer peripheral side from the start position, the position at which the recording operation at the second constant linear velocity is performed is set on the outer peripheral side of the recording end position (step H). . By setting the position where the recording operation at the second constant linear velocity is performed to the outer peripheral side from the recording end position, it is possible to prevent the switching operation of the recording speed from being performed during the recording operation. When the setting operation is performed, the control operation in step F, that is, the first
An operation of starting a recording operation at a constant linear velocity and terminating the recording operation when the recording operation of the signal ends is performed.

In step G, the recording end position is the second
If it is determined that the recording operation at the constant linear velocity is a predetermined position or more on the outer peripheral side from the start position, the recording operation at the first constant linear velocity is started, and the recording operation at the second linear velocity is possible. Upon reaching the position, the state is switched to a state in which the recording operation is performed at the second constant linear velocity, and an operation of terminating the recording operation when the signal recording operation is completed is performed (step I).

In the present embodiment, the case where the recording linear velocity is two linear velocities, that is, the first linear velocity constant and the second linear velocity constant, has been described. It is of course possible to implement the present invention in an optical disk recording / reproducing apparatus capable of performing the above.

[0033]

As described above, according to the present invention, the first signal is recorded in the entire signal recording area.
It is configured such that a recording operation at a constant linear velocity and a recording operation at a constant second linear velocity higher than the first linear velocity can be performed in an area on the outer peripheral side of a predetermined position of the signal recording area. In the optical disc recording / reproducing apparatus configured to be able to switch from the recording operation state at the first constant linear velocity to the state of performing the recording operation at the second constant linear velocity when the recording position is moved to the position A recording end position is recognized based on a recording start position and a data amount of a signal to be recorded, and a switching operation from a recording operation at the first constant linear velocity to a recording operation at the second constant linear velocity is performed based on the recording end position. Is selectively controlled, so that the recording operation in the optical disc recording / reproducing apparatus capable of performing the recording operation at a plurality of constant linear velocities can be efficiently performed. It can be carried out.

Further, according to the present invention, when the recording end position is a position where the recording operation at the second constant linear velocity cannot be performed, the recording operation at the first constant linear velocity is performed. There is an advantage that there is no need to perform a useless determination operation as to whether or not to switch to a state in which the recording operation is performed at a constant speed.

According to the present invention, when the recording end position is a position where the recording operation can be performed at the second constant linear velocity, the first recording time is taken into consideration in consideration of the time required for switching the recording speed.
Useless switching operation to the recording operation state by the second constant linear velocity is performed, which determines whether to switch from the recording operation at the constant linear velocity to the state of performing the recording operation at the second constant linear velocity. Can be prevented.

Also, the present invention is characterized in that when the recording end position is added to the time required for switching the recording speed and the recording time is reduced, the recording operation with the first constant linear velocity is changed to the recording operation with the second constant linear velocity. The recording operation can be performed in the shortest time since the switching to the state in which the recording operation is performed is performed.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a recording control method of the present invention.

FIG. 2 is a block circuit diagram showing an embodiment of an optical disk recording / reproducing apparatus according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 disc 2 optical pickup 4 pickup control circuit 5 digital signal processing circuit 7 computer device 8 system control circuit 10 buffer RAM

Claims (4)

[Claims] 1. A recording operation at a constant first linear velocity in an entire area of a signal recording area and a recording operation at a constant second linear velocity faster than the first linear velocity in an area on an outer peripheral side of a predetermined position in a signal recording area. And when the recording position moves to the predetermined position, the first
In an optical disc recording / reproducing apparatus configured to be able to switch from a recording operation state at a constant linear velocity to a state at which a recording operation at a second linear velocity is performed, a recording start position and a data amount of a signal to be recorded before recording start. The recording end position is recognized based on the recording end position.
A recording control method for an optical disc recording / reproducing apparatus, wherein a switching operation from a recording operation at a constant linear velocity to a state of performing a recording operation at a second constant linear velocity is selectively controlled. 2. The method according to claim 1, wherein when the recording end position is a position where the recording operation at the second constant linear velocity cannot be performed, the recording operation at the first constant linear velocity is performed. The recording control method described in the above. 3. When the recording end position is a position where the recording operation at the second constant linear velocity can be performed, the recording operation at the first constant linear velocity is switched to the second linear operation considering the time required for switching the recording speed. 2. The recording control method according to claim 1, wherein it is determined whether or not to switch to a state of performing a recording operation at a constant speed. 4. When the recording time is shortened even if the time required for switching the recording speed is added to the recording end position, the first
4. The recording control method according to claim 3, wherein switching is performed from a recording operation at a constant linear velocity to a state of performing a recording operation at a second constant linear velocity.