JP3754265B2 - Recording control method for optical disc recording / reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND 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 irradiated from an optical pickup and perform a reproduction operation of the signal recorded on the disk by the laser.
[0002]
[Prior art]
Disc players that use an optical pickup to read out the signals recorded on the disc have become widespread, but recently, in addition to the playback function, signals are repeatedly recorded on the disc by a laser emitted from the optical pickup. An optical disc recording / reproducing apparatus configured so as to be able to be used is commercialized.
[0003]
Such an optical disc recording / reproducing apparatus is configured to form pits on the disc by a laser. However, if the laser output is not optimal, the shape of the pits may be too large or too small. Become. Therefore, the disc used in such an optical disc recording / reproducing apparatus is provided with a trial writing area on the innermost circumference side, and after recording the signal in the trial writing area, the reproduction is performed and the reproduction signal is detected. The laser output for recording is set by the above-mentioned technique, and as such a technique, there is one disclosed in, for example, Japanese Patent Laid-Open No. 6-76288.
[0004]
[Problems to be solved by the invention]
The operation of recording a signal on a disc is performed by forming a pit on a signal track provided on the disc with a light beam output from a laser element. The size of the pit is a specified size. It is set to be. Such a signal recording operation is performed by rotationally driving the disk at a predetermined linear velocity, but recently, the recording operation is performed with the linear velocity during the recording operation being several times the predetermined velocity. An optical disc recording / reproducing apparatus that can be used has been commercialized.
[0005]
A signal recording operation in the optical disc recording / reproducing apparatus is performed on a signal recording area provided on the disc. In such a recording operation, information data indicating a signal recording position is provided on the inner circumference side of the disc. The signal recording operation is started from a desired position by using the information data recorded in the buffer area called PMA and using the information data recorded in the buffer area.
[0006]
In addition, such an optical disk recording / reproducing apparatus is configured to set a laser output that matches the characteristics of the disk by recording a test signal in a test writing area provided further on the inner circumference side than the buffer area. However, there is a limit to the trial writing area, and for example, it is defined so that the setting operation can be performed 100 times. In such a disc, a count area for recording the count number indicating how many times the setting operation described above has been performed is provided between the test writing area and the buffer area, and each time the setting operation is completed. The count number is recorded.
[0007]
In such an optical disc recording / reproducing apparatus, if the laser output setting operation is performed 100 times by the test signal recording operation, the next laser output setting operation cannot be performed. There is a problem that the recording operation cannot be performed accurately.
[0008]
The present invention is intended to provide a laser output setting method for an optical disc recording / reproducing apparatus that solves such a problem.
[0009]
[Action]
The present invention performs a laser output setting operation by recording a test signal in a test writing area provided on the inner peripheral side of the disc, and records a signal in a buffer area provided outside the test writing area. In the optical disc recording / reproducing apparatus configured to record the information data indicating, when the laser output setting operation is performed, the data set in the buffer area is recorded as the recording data and is recorded in the buffer area When performing the erasing operation of information data, it is determined whether or not recording data is recorded in the buffer area. If recording data is recorded, the recording data is recorded in the head part of the buffer area. Is.
[0010]
【Example】
FIG. 1 is a flowchart showing a recording control method of the present invention, and FIG. 2 is a block circuit diagram showing an embodiment of an optical disk recording / reproducing apparatus according to the present invention.
[0011]
2, 1 denotes a disk which is rotated by the rotation of the turntable while being placed on a turntable which is rotated by a spindle motor (not shown) (not shown), positional information data is pre Recording is performed by meandering grooves called grooves, and a signal recording / reproducing operation is performed based on a wobble signal obtained from the grooves. Reference numeral 2 denotes a laser element that irradiates the disk 1 with a light beam and a monitor diode that monitors light emitted from the laser element, and a photodetector that receives the light beam reflected from the signal surface of the disk 1. A built-in optical pickup 3 is a pickup feeding motor for moving the optical pickup 2 in the radial direction of the disk 1.
[0012]
Reference numeral 4 denotes an RF signal amplifier circuit that amplifies an RF signal obtained from a photodetector incorporated in the optical pickup 2 and shapes the waveform, and reference numeral 5 denotes the signal obtained via the RF signal amplifier circuit 4. It is a pickup control circuit that performs a focusing control operation for focusing the light beam of the optical pickup 2 on the signal surface of the disk 1 and a tracking control operation for causing the light beam to follow the signal track on the signal surface.
[0013]
Reference numeral 6 denotes a digital signal processing circuit that performs digital signal processing of signals output from the RF signal amplification circuit 4 and performs demodulation operations of various signals. Reference numeral 7 denotes a digital signal processed by the digital signal processing circuit 6. If the information recorded on the disc 1 is an audio signal, it is converted to an analog signal and then output to an amplifier or the like. In the case of a data signal such as computer software, it is digital. The signal is output to the computer device 8 as it is.
[0014]
Reference numeral 9 denotes a system control circuit that receives a signal demodulated by the digital signal processing circuit 6 and performs various control operations in accordance with a command signal from the computer device 8. Reference numeral 10 denotes a pickup feed motor drive circuit whose operation is controlled by the system control circuit 9, and has a function of controlling the rotational drive of the pickup feed motor 3.
[0015]
Reference numeral 11 denotes a laser drive circuit for supplying a signal for driving a laser element incorporated in the optical pickup 2, and 12 denotes a laser output control circuit whose operation is controlled by the system control circuit 9. Is configured to set the output of the laser by controlling. A signal recording circuit 13 records a signal on the disk 1 by inputting a recording signal such as a test signal or an information signal and controlling the laser irradiation operation by the laser driving circuit 11 in response to the recording signal. is there.
[0016]
In such a configuration, the operation of setting the laser output suitable for the characteristics of the disc 1 is performed by recording a test signal in the test writing area provided on the inner peripheral side of the disc 1 while changing the laser output. However, since such an operation is well known, the description thereof is omitted. When the setting operation of the laser output is completed, an operation for recording a signal indicating the number of times set in the count area is performed.
[0017]
Further, when the setting operation of the laser output is completed, an operation of recording the recording data obtained by the setting operation of the laser output in the buffer area provided on the disk 1 and recording the information data indicating the recording position of the signal is performed. Configured to be done.
[0018]
Further, in such a configuration, when performing an erasing operation of information data recorded in the buffer area, it is determined whether or not recording data is recorded in the buffer area, and the recording data is recorded. If the signal is read, the recording data is recorded in the head portion of the buffer area after reading the signal. When the recording operation to the head portion of the recording data is completed, the erasing operation is performed on the area other than the portion where the recording data of the buffer area is recorded.
[0019]
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. When a command signal for performing a reproduction operation is output from the computer device 8, a control operation for the reproduction operation by the system control circuit 9 is started. When such a reproduction operation is performed, the laser drive circuit 11 is supplied with a drive current for obtaining a laser output for performing a signal read operation to the laser element incorporated in the optical pickup 2. Is set to
[0020]
When the control operation for such reproduction operation is started, the spindle motor rotation control operation by the spindle motor drive circuit (not shown) is performed, and the focusing control operation and tracking control operation of the optical pickup 2 are started. Thus, the reading operation of the signal from the disk 1 by the optical pickup 2 is started. The signal read out by the optical pickup 2 is input to the digital signal processing circuit 6 through the RF signal amplification circuit 4, and the signal is demodulated. When signal processing is performed by the digital signal processing circuit 6 and information data is extracted, the information data is subjected to signal processing such as error correction and then applied to the signal reproduction circuit 7.
[0021]
When the information data read from the disk 1 is an audio signal, the signal reproduction circuit 7 converts the data into an analog signal and outputs it to an amplifier or the like. Is output to the computer device 8 as a digital signal.
[0022]
As described above, the reproducing operation in this embodiment is performed. Next, the recording operation will be described.
[0023]
When the disc 1 is inserted into the disc mounting portion in order to perform the signal recording operation, first, a determination operation is performed as to whether or not the inserted disc 1 is a blank disc, that is, a disc on which no signal is recorded. Such an operation can be performed by detecting whether information data or recording data is recorded in the buffer area. When it is determined that the disc 1 is a blank disc by such a determination operation, a recording condition such as a laser output is set by performing a test signal recording operation in a test writing area provided on the inner peripheral side of the disc 1. At the same time, an operation of recording the count number in the count area provided on the outer peripheral side of the test writing area is performed. When the recording condition setting operation is completed, an operation for recording the recording data indicating the recording condition set in the buffer area provided on the outer peripheral side of the count area is performed.
[0024]
When such an operation is completed, a signal is recorded on the disc 1 according to the recording conditions set by the laser output setting operation. Such a recording operation is performed by the laser output control circuit 12 based on the set recording conditions, and the laser drive circuit 11 matches the characteristics of the disc 1 to the laser element incorporated in the optical pickup 2. A drive signal for obtaining a laser output is output. Then, the optical pickup 2 is moved to the position where the signal recording operation is performed by the rotational driving operation of the pickup feeding motor 3 by the pickup feeding motor drive circuit 10 and the control operation by the pickup control circuit 5, and the optical operation is performed by the moving operation. When the beam moves to a desired position, a recording operation on the disk 1 is started.
[0025]
When the disc 1 used for the recording operation is a blank disc, the operation is performed as described above. When the disc 1 is not a blank disc, the optical pickup 2 is moved to the buffer area and recorded in the buffer area. The operation for reproducing the signal is performed. When the reproduction operation of the signal recorded in the buffer area is performed in this way, the operation for determining whether or not the recording data is recorded in the buffer area is performed.
[0026]
When it is determined that the recording data is not recorded in the buffer area by such a determination operation, the recording condition setting operation and the count area by the test signal recording operation to the test writing area are performed as in the case of the blank disc described above. The count operation is recorded. When such an operation is performed, the recording operation of the recording data in the buffer area is performed as described above, and then the recording operation of the signal in the desired recording area is started.
[0027]
When it is determined that recording data is recorded in the buffer area, a laser control operation is performed by the laser output control circuit 12 based on the read recording data, and the laser pickup circuit 11 incorporates the recording data into the optical pickup 2. A drive signal that matches the characteristics of the disk 1 is supplied to the laser element that is being used, and the signal recording operation on the disk 1 can be performed in an optimum state.
[0028]
As described above, the signal recording operation in the present embodiment is performed. Next, the recording control method which is the gist of the present invention will be described with reference to the flowchart shown in FIG.
[0029]
In an optical disc recording / reproducing apparatus capable of repeatedly recording signals on the disc 1, when erasing the signal recorded on the disc 1, the information data recorded on the buffer area is erased. Thus, when such an erasing operation is performed, the recording data recorded in the buffer area is erased.
[0030]
The present invention has been made in view of such a point. When an operation is started to erase information data recorded in the buffer area, first, a reproduction operation of a signal recorded in the buffer area is performed. Performed (Step A). When the reproduction operation of the signal recorded in the buffer area is performed, a determination operation is performed to determine whether or not recording data is included in the reproduction signal, that is, whether or not the recording data is recorded in the buffer area ( Step B).
[0031]
If it is determined in step B that the recording data is not recorded, the signal recorded in the buffer area is erased (step C). If it is determined in step B that the recording data is recorded, an operation of recording the reproduced recording data at the head portion of the buffer area is performed (step D). When such a recording operation is performed, an erasing operation is performed for an area other than the head portion where the recording data of the buffer area is recorded (step E).
[0032]
As a result of such an operation, when performing a recording operation using the disc subjected to the recording control process, the laser output setting operation is performed by using the recording data recorded in the buffer area. There is no need to do it.
[0033]
【The invention's effect】
The present invention determines whether or not the recording data for setting the laser output is recorded when performing the erasing operation of the information data recorded in the buffer area, and when the recording data is recorded, Since the recording data is recorded at the head of the buffer area, the next time the recording operation is performed using the disk on which such a signal is recorded, there is no need to newly perform the laser output setting operation. The recording operation can be started quickly.
[0034]
In the present invention, when the recording operation of the recording data to the head portion of the buffer area is completed, the erasing operation of the area other than the head portion where the recording data of the buffer area is recorded is performed. This has the advantage that the data erasing operation is not mistakenly performed.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a recording control method of the present invention.
FIG. 2 is a block circuit diagram showing an embodiment of an optical disc recording / reproducing apparatus according to the recording control method of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc 2 Optical pick-up 4 RF signal amplification circuit 5 Pickup control circuit 6 Digital signal processing circuit 9 System control circuit 11 Laser drive circuit 12 Laser output control circuit

Claims (1)

Information data indicating the laser output setting operation by recording a test signal in the test writing area provided on the inner circumference side of the disc and the signal recording position in the buffer area provided outside the test writing area a constructed recording control method of the optical disc recording and reproducing apparatus to record, when the setting operation of the laser output by the recording operation of the test signal to the test writing area has been performed, the set laser power by the setting operation When the recording data is recorded as the recording data in the buffer area and the information data recorded in the buffer area is erased, it is determined whether or not the recording data as laser output data is recorded in the buffer area. and, information de when the recording data is determined not to be recorded is recorded in the buffer area Erases operation of data, the determining operation by a buffer other than the leading portion Ko該recording data recorded at the head portion is recorded in the buffer region of the recording data when the recording data is determined to be recorded A recording control method for an optical disc recording / reproducing apparatus, wherein an erasing operation of a signal recorded in an area is performed .

Images