JP2007102839A - Information recording and reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it takes a long recording learning time for a drive loaded with a recording type optical disk to learn optimum recording. <P>SOLUTION: When an optical disk 1 is loaded, a system controller 9 outputs a recording learning command to obtain an optimum strategy to be recorded in the optical disk 1 by an optical pickup 4. In the recording learning, an address for starting recording/reproducing in a learning area of the optical disk 1 is acquired from the system controller 9 and an address of the optical pickup 4 in the preceding recording learning which is stored in the memory 10 is acquired from the memory 10, so that the search of the address on which the optical pickup is located can be suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information recording medium such as an optical disc and an information recording / reproducing apparatus for recording / reproducing using the same, and more particularly to an information recording medium having a recording power calibration area and an information recording / reproducing apparatus using the same.

  An optical disc that is a recording / reproducing medium capable of optically recording an information signal on an information layer or optically reproducing user data recorded on an information layer is a compact disc called a CD or a digital versatile called a DVD. Discs are widely used. An optical disc apparatus that performs recording and / or reproduction (hereinafter referred to as recording / playback) of these optical discs includes an optical pickup that forms a light beam spot on an information layer included in the optical disc, and an optical pickup that currently irradiates the optical beam. A register for storing a position, a motor for rotating the optical disc, a system controller for controlling the motor and the optical pickup, and a traverse control circuit for controlling a traverse for moving the optical pickup in the radial direction of the optical disc. The traverse control circuit is a seek operation that changes the irradiation position of the light beam output from the optical pickup from the current irradiation position to a specific position, and a jump operation that changes the position of the light beam included in this seek operation. Also has control.

In such an optical disc apparatus, for the purpose of improving the recording / reproducing speed for a desired information layer, Patent Document 1 discloses a configuration including a buffer memory that temporarily stores an information signal to be recorded on the disc. By storing information in the buffer memory, while there is enough free space to store the information signal in the buffer memory, the recording / playback is interrupted by temporarily storing the information signal to be recorded / reproduced in the information layer in the buffer memory. As a user, the recording / playback speed can be improved. If there is no free space in the buffer memory, the recording / playback operation on the optical disc will be interrupted. However, in preparation for resuming the recording / playback, the current address is automatically maintained without going through the system controller. With a configuration including an automatic jump back operation for executing a quantity of jump operations, it is possible to prevent a decrease in access speed.
JP-A-5-002817

  However, an automatic jumpback operation is possible with a configuration having a buffer memory, and the automatic jumpback operation can prevent a decrease in access speed as described above. However, the effect of preventing the decrease in access speed is not necessarily universal. . In other words, since the automatic jumpback operation executes the jump operation under the control of the traverse control circuit without a command from the system controller, the variable movement amount in consideration of the time until the access request after the automatic jumpback operation processing and the address to be accessed There is a problem that a jump back operation for performing a jump operation having a correlation cannot be performed.

  By the way, when information is recorded on an optical disc, recording learning for adjusting the output of light beams and waveform conditions (called so-called strategies) applied to the information layer is performed in the order determined by a plurality of addresses. Recording is performed by irradiating the recording learning area with the light beam multiple times, and the recording mark is reproduced to confirm the quality of the recording mark recorded in the recording learning area of the information layer, and recording is performed until an optimum strategy is established. And repeat playback.

  As shown in FIG. 3, when the above jumpback operation is applied to recording learning that requires repeated recording and reproduction for a certain address address in a predetermined order for a plurality of addresses as described above. Will be applied.

  When a recordable optical disk is loaded in the optical disk apparatus, the system controller instructs recording learning for the optical disk. Based on the information stored in the system controller, in step 301, the recording / reproduction length and recording / reproduction start address for recording learning are determined. In response to the determination in step 301, in step 302, the address at which the optical pickup for the information layer of the optical disc is currently located is read, and the recording / reproducing circuit responsible for mutual conversion between the detection signal of the optical pickup and the information signal, etc. Recording / playback preparation processing is performed (step 303).

  The recording / reproduction start address acquired from the controller in step 301 is compared with the current address where the optical pickup acquired in step 302 is located (step 304). In the conventional configuration, as described above, since the automatic jumpback is independent of the control by the system controller, the comparison in step 304 cannot be the same from the beginning, and is obtained by the comparison in step 304. A jump distance corresponding to the address difference is determined (step 305). The number of addresses determined in step 305 is converted into a track, and a track jump is executed in step 306. After the track jump executed in step 306, in step 307, the current address where the optical pickup after the track jump is located is read. In step 304, the current address read in step 307 is compared with the recording / reproduction start address acquired in step 301. The current address of the optical pickup after the track jump and the recording / reproduction start address acquired in step 301 are the same. The loop of steps 305, 306 and 307 is repeated until.

  When the address after the track jump and the recording / reproduction start address are detected to be the same in step 304, recording learning is performed in step 308 with a strategy corresponding to the laser irradiation conditions set in advance as recording learning. In step 309, the completion of recording learning is determined. If not completed, the next strategy is repeated from step 301 to acquire the next strategy. If it is determined in step 309 that recording learning is complete, the recording learning job is terminated.

  As described above, in the conventional automatic jumpback having no correlation between the recording / playback start address and the current address, it is indispensable to repeat the loop of steps 305, 306 and 307 until it is determined to be the same in step 304. When changing the strategy and restarting from step 301, the loop of steps 305 to 307 is similarly repeated. Since a recordable optical disk performs recording learning each time it is loaded into the optical disk apparatus, one loop of steps 305 to 307 is approximately 10 msec, but it takes approximately 100 msec to exit the loop. The time required for the end of the record learning job to exit the loop of step 309 is 10 sec to 12 sec. Since the time required for recording learning directly affects the so-called start-up time from when the user starts up the optical disk device to actual recording, the conventional jump-back operation cannot shorten the start-up time. Will force painful time.

  An object of the present invention is to provide an information recording / reproducing apparatus capable of shortening the start-up time of an optical disc apparatus in view of the related problems.

  In order to solve the above-mentioned problem, the configuration of the information recording / reproducing apparatus of the present invention includes: a rotating unit that rotates an information medium including an information layer having address information; a rotation control unit that controls the number of rotations of the rotating unit; An optical pickup means for irradiating an information layer with an optical beam to exchange information signals, a pickup control means for controlling the optical beam emitted by the optical pickup, and moving the optical pickup means in a radial direction of the information medium Movement means, movement control means for controlling the movement amount of the movement means, recording / reproducing means for mutual conversion of the detection signal detected by the optical pickup means and the information signal, the rotation control means, and the pickup control means And system control means for controlling the movement control means in an integrated manner, and the optical pickup hand under the control of the system control means. There and a storage means for storing the address information of the information layer is irradiated with the information layer.

  According to the information recording / reproducing apparatus of the present invention, since the time required for recording learning can be greatly reduced, the startup time of the information recording / reproducing apparatus can be reduced.

  Hereinafter, a preferred embodiment of an information recording / reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 1 shows a main configuration of an information recording / reproducing apparatus (hereinafter referred to as a drive) according to an embodiment of the present invention. 1 is an information medium (hereinafter referred to as an optical disk), and 2 is a spindle motor that rotates the optical disk 1. 3 is a motor control circuit for controlling the rotation of the spindle motor, 4 is an optical pickup for exchanging information layers (not shown) provided in the optical disc 1 and user information signals, and 5 is a detection signal and user information detected by the optical pickup 4. A format unit that performs recording and reproduction by mutually converting signals, 6 is a traverse control circuit that controls a traverse 7 that moves the optical pickup 4 in the radial direction of the optical disc 1, and 9 is a component of the drive described above according to commands from the host computer System controller 10 for controlling the position of the optical pickup 4 relative to the information layer. A memory that 憶. The operation of each component shown in the figure will be described with reference to FIG.

  When the optical disc 1 is loaded in the drive, the system controller 9 first determines whether the disc has a recordable information layer via the optical pickup 4, the optical pickup control circuit 6, and the format unit 5. When the mounted optical disc 1 has a recording type information layer, a recording learning command is issued from the system controller 9 and the drive starts a recording learning job.

  When the job is started, a recording / reproduction length and a recording / reproduction start address for performing recording learning on the optical disc 1 are instructed from the host computer to the system controller 9 to determine a recording / reproduction length and a recording / reproduction start address for starting the recording learning. (Step 201). Next, in step 202, it is determined whether or not the current address in the information layer where the optical pickup 4 is located is known. Immediately after the optical disk 1 is mounted in the drive, the address of the information layer where the optical pickup is located is unknown as in the prior art, and as described above, the current address is obtained from the optical pickup control circuit 6 (step 302). In step 303, a recording / reproduction preparation process such as initialization of the format unit, and the comparison between the recording / reproduction start address and the current address are compared (step 304). A jump distance corresponding to the address difference is determined (step 305), a track jump is performed (step 306), and the current address where the optical pickup 4 after the jump is located is read (step 307). The loop of steps 305 to 307 is repeated until Thus, the recording learning immediately after the optical disc 1 is attached to the drive (hereinafter referred to as the first recording learning loop) is completed. The address in the information layer of the optical pickup 4 that has finished the first recording learning loop is stored in the memory 10 via the system controller 9. In the information recording / reproducing apparatus of the present invention, the address at which the optical pickup 4 that has finished the recording learning loop is stored in the memory 10 via the system controller at each recording learning loop. However, when n is an integer equal to or greater than 2, the address at which the optical pickup 4 at the end of the (n-1) th recording learning loop is stored is stored, so that the current address in step 202 is grasped. Will be. That is, it is possible to suppress the passage from the routine from step 302 to step 201 from the nth record learning loop, and the record learning can be performed by a routine from step 203 to step 201 described later.

  That is, in step 203, the current address at which the optical pickup 4 is stored stored in the memory 10 is read out, the rotational speed of the spindle motor 2 is acquired from the motor control circuit 3, and the acquired rotational speed and the current address of the optical pickup 4 are obtained. From this, the current linear velocity is calculated (step 204). Based on the current linear velocity acquired in step 204, an address at which the recording learning area elapses in the light beam irradiation preparation period in the n-th recording learning loop (that is, the n-th recording learning loop process preparation standby) is calculated ( In step 205), the number of addresses acquired in step 205 is further subtracted from the difference between the recording / playback start address at which the recording learning area starts to be irradiated in the nth recording learning loop and the address read from the memory 10 acquired in step 203. In step 206, only the address is determined as the jump distance. A track jump is performed in step 207 by the jump distance determined in step 206. When a track jump is performed in step 207, a recording / reproduction preparation process is performed in step 208 in the same manner as in step 303 described above. In step 209, the address in the information layer where the optical pickup 4 is located is read out and stored in the memory 10. In the same manner as in Step 210, the recording learning area is irradiated with the light beam to be applied to the n-th recording learning loop. When it is determined in Step 211 that the recording learning is not completed, the process returns to Step 201. In Step 202, the current address is already known. For this reason, the loop from step 203 to step 211 is executed. If record learning of this embodiment is performed, the time required for conventional record learning can be shortened from about three-quarters to about two-thirds, and the drive is started up for the time shortened in the record learning process. Speed can be improved.

  The present invention is more effective as an information recording / reproducing apparatus targeting a high-density information medium, and further includes an information recording / reproducing apparatus having a wavelength corresponding to each of a plurality of types of recording-type information media referred to as a super multi-drive. It is suitable for.

1 is a configuration diagram of a main part of an information recording / reproducing apparatus according to an embodiment of the present invention. Flow chart showing the flow of processing in the same embodiment Flow chart showing the flow of conventional processing

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2 Spindle motor 3 Motor control circuit 4 Optical pickup 5 Format unit 6 Pickup control circuit 7 Traverse 8 Traverse control circuit 9 System controller 10 Memory

Claims (1)

A rotating means for rotating an information medium comprising an information layer having address information;
Rotation control means for controlling the rotation speed of the rotation means;
An optical pickup means for irradiating the information layer with a light beam to exchange information signals;
Pickup control means for controlling the light beam emitted by the optical pickup;
Moving means for moving the optical pickup means in a radial direction of the information medium;
Movement control means for controlling the amount of movement of the movement means;
Recording / reproducing means for mutual conversion between the detection signal detected by the optical pickup means and the information signal;
System control means for integrally controlling the rotation control means, the pickup control means and the movement control means;
An information recording / reproducing apparatus comprising: storage means for storing address information of the information layer irradiated by the optical pickup means under the control of the system control means.