JP2001023306A - Method and device for recording data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start an operation in a short time in the case of recording or reproduction and also to save power consumption in the case of recording and reproduction. SOLUTION: The recording start address of a MD 31 is obtained in this data recording method by referring to the capacity of digital audio data DA of a dubbing piece of music to be reproduced from a CD 21 and recording information (information of a non-recorded part and a recorded part) of the MD 31. The recording start address is for recording data DA by putting them in the non-recorded part at the outer peripheral side of the MD 31 in a compressed form. Data DA is recorded on the MD 31 by using the obtained recording start address. Thus, data DA is recorded on the non-recorded part at the outer peripheral side of the MD 31 in a compressed form. In this case, the angular velocity of the MD 31 which is required when recording or reproducing is started can be made to be slower compared with the case of recording in an inner peripheral part. Consequently, the operation is started in a short time in the case of recording or reproducing and also power consumption at the time of recording or reproducing is saved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data recording method and a data recording apparatus for recording digital data on a disk-shaped recording medium which is recorded and reproduced from an inner peripheral side to an outer peripheral side in a constant linear velocity system. More specifically, by recording the recorded digital data in an unrecorded portion on the outer peripheral side of the disk-shaped recording medium, the operation can be started in a short time at the time of recording or reproduction, and the consumption at the time of recording or reproduction can be reduced. The present invention relates to a data recording method and a data recording device capable of reducing power.

[0002]

2. Description of the Related Art Conventionally, as a disk-shaped recording medium which is recorded and reproduced from an inner peripheral side to an outer peripheral side by a constant linear velocity system,
For example, an MD (mini-disc) is known. This MD
For example, when recording audio data reproduced from a CD (compact disc), the default position at which recording is started is statically set to the inner side.

[0003]

The above-mentioned M
In the case of recording / reproducing from the inner circumference to the outer circumference using the constant linear velocity method such as D, as the audio data is recorded on the inner circumference, the MD rotates at a higher angular velocity during recording and playback. I have to let it. Therefore, assuming that the default position at which recording is started is statically determined on the inner peripheral side as described above, recording and reproduction are often performed on the inner peripheral side of the MD, and the power consumption for disk rotation control increases.

For example, as shown in FIG. 4A, at a reproduction position La on the inner peripheral side where the distance from the center of the disk is ra,
In order to obtain the linear velocity v, the angular velocity ωa = v / ra is required. In this case, the moment of inertia of the disc is expressed as J
Then, the kinetic energy Ea is expressed by equation (1). On the other hand, as shown in FIG. 4B, at the reproduction position Lb on the outer peripheral side where the distance from the center of the disc is rb, the angular velocity ωb = v / rb is required to obtain the linear velocity v. In this case, assuming that the moment of inertia of the disk is J, the kinetic energy Eb is expressed by equation (2).
Here, if it is assumed that rb = 2ra, the energy required for rotating the disk is four times as large as the reproducing position Lb on the inner peripheral side at the reproducing position La on the inner peripheral side.

[0005]

(Equation 1)

If the default position at which recording is started is statically determined on the inner side as described above, M
In many cases, recording / reproduction is started from the inner peripheral side of D. In that case, the angular velocity of MD required at the start of recording / reproduction is high,
Therefore, it is difficult to start the operation in a short time at the time of recording or reproduction. In addition, power consumption increases as the time until the start of operation increases.

In view of the above, the present invention provides a data recording method and the like that can start operation in a short time at the time of recording or reproduction and can reduce power consumption at the time of recording or reproduction. Aim.

[0008]

SUMMARY OF THE INVENTION A data recording method according to the present invention is a data recording method for recording digital data on a disk-shaped recording medium which is recorded and reproduced from an inner peripheral side to an outer peripheral side in a constant linear velocity system. A first step of acquiring the capacity of the recording digital data;
With reference to the capacity of the recording digital data acquired in the step and the recording information of the disc-shaped recording medium, it is necessary to pack the recorded digital data into the unrecorded portion on the outer peripheral side of the disc-shaped recording medium and record it. The method includes a second step of obtaining a recording start address, and a third step of recording digital recording data on the disk-shaped recording medium from the recording start address obtained in the second step.

[0009] The data recording apparatus according to the present invention comprises:
A data recording device for recording recording digital data on a disc-shaped recording medium that is recorded and reproduced from an inner peripheral side toward an outer peripheral side in a constant linear velocity system, and a data capacity obtaining unit for obtaining a capacity of the recording digital data, With reference to the capacity of the recording digital data acquired by the data capacity acquiring means and the recording information of the disc-shaped recording medium, the recording digital data is packed and recorded in the unrecorded portion on the outer peripheral side of the disc-shaped recording medium. An address calculating means for obtaining a necessary recording start address, and data recording means for recording digital digital data on a disk-shaped recording medium from the recording start address obtained by the address calculating means.

[0010] In the present invention, the disk-shaped recording medium is recorded and reproduced from the inner peripheral side toward the outer peripheral side by a constant linear velocity system. When recording digital data on this disk-shaped recording medium, the capacity of the recorded digital data is obtained. When the recorded digital data is, for example, digital audio data of one or a plurality of music pieces reproduced from a CD,
The above capacity can be obtained from the TOC (Table Of Contents) information recorded in the.

It is also possible to determine the recording start address by referring to the capacity of the recording digital data thus obtained and the recording information (information of the unrecorded part and the recorded part) of the disk-shaped recording medium. Will be In this case, the recording start address is for recording the recorded digital data in an unrecorded portion on the outer peripheral side of the disk-shaped recording medium.

Then, the recording digital data is recorded on the disk-shaped recording medium from the recording start address thus obtained. In this case, if the recording position reaches the recorded portion before the recording of the recorded digital data is completed, the recording position is moved to the beginning of the next unrecorded portion, and the recording of the recorded digital data is continued.

As a result, the recorded digital data is packed and recorded in the unrecorded portion on the outer peripheral side of the disk-shaped recording medium. In this case, the angular velocity of the disk-shaped recording medium required at the start of recording / reproduction can be made slower than in the case of recording on the inner peripheral portion. Therefore, the operation can be started in a short time at the time of recording or reproduction, and the power consumption at the time of recording or reproduction can be reduced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an audio system 10 as an embodiment. The audio system 10 includes a CD unit 20 for handling a CD (compact disc), an MD unit 30 for handling an MD (mini-disc), and a system controller 40 for controlling the operation of the entire system. In the system controller 40, the user stores the CD unit 20 and the MD unit 30.
An operation unit 41 for performing various operations with respect to the display unit 42 and a display unit 42 configured to display, for example, an LCD (liquid crystal display) for displaying a system state, a user operation state, and the like are connected.

In FIG. 1, the CD section 20 and M
Regarding the inside of the D section 30, for the sake of simplicity,
Only the part relating to the dubbing operation of recording the digital audio data DA reproduced from the CD by the D unit 20 on the MD by the MD unit 30 is shown.

The CD section 20 will be described. The CD 21 is rotated by a spindle motor 22. The operation of the spindle motor 22 is controlled by a servo circuit 23 so that the CD 21 rotates at a constant linear velocity during reproduction. The reproduction of the CD 21 is performed using an optical head 24 using a laser beam. This optical head 24
The operations such as focus, tracking, and seek are controlled by the servo circuit 23.

A reproduction signal output from the optical head 24 is supplied to a reproduction processing circuit 25, and the reproduction processing circuit 2
In step 5, the reproduced signal is subjected to digital demodulation, error correction, and other processing to obtain digital audio data DA. The operations of the reproduction processing circuit 25 and the servo circuit 23 described above are controlled by the system controller 40, respectively. Although not described above, the TOC information reproduced from the CD 21 is supplied to the system controller 40 through the reproduction processing circuit 25. Thus, the system controller 40 can grasp the data capacity of each music piece recorded on the CD 21.

The MD section 30 will be described. The MD 31 is rotated by a spindle motor 32. The operation of the spindle motor 32 is controlled by a servo circuit 33 so that the MD 31 rotates at a constant linear speed during recording or reproduction. Further, recording on the MD 31 is performed in cooperation with the laser beam from the optical head 34 and the magnetic head 37 (recording by a magnetic field modulation method). The reproduction of the MD 31 is performed using the optical head 34. Optical head 3
The operations such as focus, tracking, and seek of 4 are controlled by the servo circuit 33.

The digital audio data DA obtained by the reproduction processing circuit 25 of the CD section 20 is supplied to a recording processing circuit 35. In the recording processing circuit 35, processing such as data compression, error correction coding, and digital modulation is performed on the digital audio data DA to obtain a recording signal. The recording signal is supplied to the magnetic head driver 36, and is supplied to the MD 31. Be recorded. This recording processing circuit 35
The operation of the servo circuit 33 described above is controlled by the system controller 40. In addition, MD
UTOC (User Table Of Content)
s) The information is supplied to the system controller 40 through a reproduction processing circuit (not shown). Thereby, the system controller 40 can grasp the unrecorded portion (recorded area not yet recorded) and the already recorded portion (recorded area already recorded) of the MD 31.

Next, using the flowchart of FIG.
In the audio system 10 of FIG. 1, the control operation of the system controller 40 when an instruction to dub a predetermined song (one or more songs) from the CD 21 to the MD 31 by an operation of the operation unit 41 by the user will be described. I do.

First, in step ST1, the TO of the CD 21 is
By referring to the C information, the recording data capacity of the music piece instructed to be dubbed (hereinafter referred to as “dubbing music piece”) is obtained. Next, in step ST2, the recording start address of the MD 31 is obtained with reference to the recording data capacity and the UTOC information of the MD 31. In this case, the recording start address is the digital audio data of the dubbed music,
This is for recording in a non-recorded portion on the outer peripheral side of 31.

The recording start address is obtained, for example, as follows. The outermost peripheral address of the recording area is ADa
And the recording data capacity is Q0. First, an address ADb at which data of the capacity Q0 can be recorded up to the outermost peripheral address ADa is obtained and set as a recording start address candidate. Then, when there is no recorded portion after the address ADb as shown in FIG. 3A, the address ADb is determined as the recording start address.

On the other hand, after the address ADb, FIG.
As shown in (1), when there is a recorded portion having the data capacity Q1, an address ADc at which data of the capacity Q1 can be recorded up to the address ADb is obtained and set as a candidate for a recording start address. Then, from this address ADc to the address ADb
Until there is no recorded portion as shown in FIG. 3C, the address ADc is determined as the recording start address.

On the other hand, from address ADc to address A
If there is a recorded part before Db, a recording start address candidate is determined based on the data capacity of the recorded part, and the determination process is performed, as described above.

In the flowchart shown in FIG. 2, after the recording start address of the MD 31 is obtained as described above, the reproduction of the dubbed music from the CD 21 is started by the CD section 20 in step ST3, and the M
The recording to D31 is started. In this case, in the CD section 20, a reproduction signal obtained from the optical head 24 is supplied to a reproduction processing circuit 25, and the reproduction processing circuit 25 outputs digital audio data Da of a dubbed music piece.

In the MD section 30, the CD section 20
The digital audio data DA of the dubbed music output from the magnetic head driver 3 is supplied to the recording processing circuit 35, and the recording signal output from the recording processing circuit 35 is supplied to the magnetic head driver 3.
6. Thus, the MD 31 is driven by the cooperation of the laser beam from the magnetic head 37 and the optical head 34.
The recording signal is recorded on the recording medium. In this case, recording on the MD 31 is started from the recording start address obtained in step ST2.

Next, in step ST4, the CD unit 20
From D21, it is determined whether or not the reproduction of the dubbed music has been completed. This determination is made based on well-known subcoding information reproduced from the CD 21 and supplied from the reproduction processing circuit 25 to the system controller 40. If the reproduction of the dubbed music has not been completed, at step ST5, the MD3
It is determined whether the recording position of No. 1 has reached the recorded portion.
This determination is made based on address information obtained from a pre-groove formed in the MD 31 as is well known.

If the recording position of the MD 31 has reached the recorded part before the reproduction of the dubbed music from the CD 21 ends, the process proceeds to step ST6. In this step ST6,
While the reproduction operation in the CD unit 20 is temporarily stopped,
The recording operation in the MD unit 30 is temporarily stopped. Then, in step ST7, the optical head 34 and the magnetic head 37 of the MD unit 30 are moved to the start position of the next unrecorded portion,
Thereafter, returning to step ST3, the reproducing operation in the CD unit 20 is restarted, and the recording operation in the MD unit 30 is restarted. As a result, the recording signal relating to the dubbed music reproduced from the CD 21 is selectively recorded only in the unrecorded portion of the MD 31.

When the reproduction of the dubbed music from the CD 21 is completed in step ST4, the process proceeds to step ST8, where the reproduction operation in the CD section 20 is stopped, and
The recording operation in the MD unit 30 is stopped, and then the control operation ends.

As described above, in the present embodiment, the digital audio data DA of the dubbed music reproduced from the CD in the CD section 20
At the time of dubbing to be recorded on D31, a recording start address for recording this digital audio data DA in an unrecorded portion on the outer peripheral side of MD31 is obtained.
1 is recorded from the recording start address. Therefore, the above-described digital audio data DA of the dubbed music is packed and recorded in the unrecorded portion on the outer peripheral side of the MD 31. Therefore, the angular velocity of the MD 31 required at the time of recording or reproduction can be made slower than at the time of recording at the inner peripheral portion, so that the operation can be started in a short time at the time of recording or reproduction. Power consumption at the time can be reduced.

In the above-described embodiment, the audio system 1 in which the digital audio data DA of the dubbed music reproduced by the CD unit 20 is recorded by the MD unit 30
The present invention is applied to other recording systems for recording digital data on a disk-shaped recording medium which is recorded and reproduced from the inner peripheral side toward the outer peripheral side in a constant linear velocity system. Of course, the same can be applied.

[0032]

According to the present invention, when digital data is recorded on a disc-shaped recording medium which is recorded and reproduced from the inner peripheral side toward the outer peripheral side in a constant linear velocity system, the digital data is packed into an unrecorded portion on the outer peripheral side. Is recorded. Therefore,
The angular velocity of the disc-shaped recording medium required at the start of recording / reproduction can be slower than that at the time of recording on the inner periphery, so that operation can be started in a short time at the time of recording or reproduction, and at the time of recording or reproduction. Power consumption at the time can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a main configuration of an audio system according to an embodiment.

FIG. 2 is a flowchart showing a control operation of a system controller during dubbing.

FIG. 3 is a diagram for explaining a method of obtaining a recording start address.

FIG. 4 is a diagram for explaining kinetic energy of a disc during inner peripheral reproduction and outer peripheral reproduction.

[Explanation of symbols]

10 audio system, 20 CD section, 2
DESCRIPTION OF SYMBOLS 1 ... CD (compact disk), 22 ... Spindle motor, 23 ... Servo circuit, 24 ... Optical head, 25 ... Reproduction processing circuit, 30 ... MD part,
31 ... MD (mini disk), 32 ... spindle motor, 33 ... servo circuit, 34 ... optical head, 35 ... recording processing circuit, 36 ... magnetic head driver, 37 ...・ Magnetic head

Claims (4)

[Claims] 1. A data recording method for recording recording digital data on a disk-shaped recording medium which is recorded and reproduced from an inner peripheral side to an outer peripheral side in a constant linear velocity system, wherein the capacity of the recording digital data is obtained. A first step, referring to the capacity of the recording digital data obtained in the first step and the recording information of the disk-shaped recording medium, to store the recording digital data on the outer peripheral side of the disk-shaped recording medium; A second step of obtaining a recording start address necessary for recording data in an unrecorded portion of the disc, and recording the recorded digital data on the disc-shaped recording medium from the recording start address obtained in the second step. And a third step of recording the data. 2. In the third step, when the recording position reaches a recorded part before the recording of the recorded digital data is completed, the recording position is moved to the beginning of the next unrecorded part, and 2. The data recording method according to claim 1, wherein recording of the recording digital data is continued. 3. A data recording apparatus for recording recording digital data on a disk-shaped recording medium which is recorded and reproduced from an inner peripheral side to an outer peripheral side in a constant linear velocity system, wherein a capacity of the recording digital data is obtained. Data capacity obtaining means, and referring to the capacity of the recording digital data obtained by the data capacity obtaining means and the recording information of the disc-shaped recording medium, the recording digital data on the outer peripheral side of the disc-shaped recording medium. Address calculating means for obtaining a recording start address necessary for recording in an unrecorded portion; and recording the recording digital data on the disc-shaped recording medium from the recording start address obtained by the address calculating means. A data recording device, comprising: data recording means. 4. When the recording position reaches a recorded part before the recording of the recorded digital data is completed, the data recording means shifts the recording position to the beginning of the next unrecorded part to record the recorded data. 4. The data recording apparatus according to claim 3, wherein recording of digital data is continued.