JPH11126427A - Recording method, recorder, reproducing method and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording method and recorder or a reproducing method and reproducing device for a recording medium such as an optical disk, etc., which are capable of easily performing simultaneous recording and reproducing of independent plural informations or simultaneous processing of recording and reproducing. SOLUTION: The device is provided with plural buffer means 7a, 7b for temporarily storing independent plural recording data or reproducing data separately from each other, and a pickup 2 whereby the recording data stored in each buffer means 7a, 7b are recorded on respective different recording regions by the time division and also the control for reproducing the data recorded on the respectively different recording regions by the time division is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method and a reproducing method for recording or reproducing using a recording medium such as an optical disk, a magneto-optical disk, a magnetic disk (hard disk), a recording apparatus to which the method is applied, and a recording method. It relates to a playback device.

[0002]

2. Description of the Related Art Various recording apparatuses and reproducing apparatuses using optical disks have been put to practical use. For example, pits are formed on the surface of a disk, binary data (1 or 0 digital data) modulated by a predetermined method is recorded, and the return of a laser beam that irradiates the disk surface with the presence or absence of the pits during reproduction is performed. There is one that performs processing for reproducing recorded binary data by detecting from light.

Further, a magnetic film on which information is recorded in a magnetization direction is formed as a recording film, and in a state where a modulation magnetic field is generated, information is recorded on a recording film at a position irradiated with a laser beam. There is also a recording device or a reproducing device using a disk called a so-called magneto-optical disk, which detects a change corresponding to the magnetization direction of the reflectance of a laser beam and performs a process of reproducing recorded information. . In this specification, an optical disk is a disk that can be recorded or reproduced by a laser beam, and includes a magneto-optical disk and a phase-change disk.

[0004]

When recording information on an optical disk or reproducing information recorded on an optical disk, a laser beam scans a track formed on the disk, for example, in a spiral shape. Since information is recorded on the track at the scanned position or information is reproduced from the track at the scanned position, basically, one track is added to the track being scanned.
A set of information is recorded, a set of information is reproduced, and a plurality of systems of information are simultaneously recorded on a plurality of different tracks, or the information recorded on a plurality of different tracks is reproduced at the same time. I couldn't do that.

[0005] When information is recorded on an optical disk, it may be necessary to reproduce the information to confirm whether the information has been reliably recorded. In such a case, the information recording is terminated. After that, it is necessary to perform a process of reproducing the recorded portion, and there is a problem that it is necessary to perform reproduction for confirmation as much as the time required for recording.

Here, for example, if a plurality of optical pickups are provided and laser beams from the plurality of optical pickups are irradiated on different tracks on the optical disk, recording on a plurality of tracks can be performed simultaneously. In addition to being able to reproduce, it is possible to perform processing such that information immediately after recording with the laser light from one pickup is reproduced with the laser light from the other pickup. However, when a plurality of optical pickups are provided, the number of components used as an optical disk device increases by that much, and it is necessary to properly servo-control all the laser beams emitted from each of the plurality of optical pickups to each track. It becomes complicated.

Although the problem in the case of recording and reproducing an optical disk has been described here, the same problem occurs in the case of recording and reproducing in other various recording media.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to enable simultaneous recording and reproduction of a plurality of independent information or simultaneous processing of recording and reproduction to be easily performed.

[0009]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention temporarily stores a plurality of independent recording data or reproduction data separately, and stores the different recording data in a time-division manner. In addition to recording in a recording area, data recorded in different recording areas is time-divisionally reproduced.

By performing such processing, one pickup performs recording or reproduction processing on a plurality of recording areas in a time-division manner, so that simultaneous recording or reproduction of a plurality of independent information can be performed.
Alternatively, simultaneous processing of recording and reproduction can be achieved with a single pickup.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a configuration of a reproducing system of an optical disk apparatus of the present embodiment. An optical disk 1 mounted on the apparatus of the present embodiment is optically rotated by a spindle motor (not shown). A laser beam from the pickup 2 is applied to the signal recording surface of the optical disc 1 and return light from the signal recording surface is detected in the optical pickup 2 to obtain a reproduction signal.

The reproduction signal detected by the optical pickup 2 is supplied to a reproduction RF processing unit 3 for performing a process of detecting reproduction data (here, digital data) from a high-frequency signal which is a reproduction signal. Is supplied to the error correction processing unit 5 and the address data included in the reproduction data is supplied to the address detection unit 4. The error correction processing unit 5 performs an error correction process using an error correction code or the like included in the reproduced data. The reproduced data subjected to the error correction processing is supplied to a buffer 7a of channel 1 (hereinafter referred to as Ch1) and a buffer 7b of channel 2 (hereinafter referred to as Ch2) via the changeover switch 6.

The address detector 4 detects a reproduction address from the supplied address data, and supplies the detected data to the system controller 10. When the data of the reproduction address is supplied to the system controller 10, a so-called seek control process for controlling the track position of the laser beam irradiated from the optical pickup 2 to the optical disc 1 to a desired track position is performed. Further, based on the reproduction address detected by the address detection unit 4, the system controller 10 controls the switching by the changeover switch 6 to control the distribution of the reproduction data to the two-channel buffers 7a and 7b. Will be

The reproduction data supplied to the Ch1 buffer 7a is subjected to decoding processing of the reproduction data by a decoder 8a, and the decoded data is obtained at an output terminal 9a of Ch1. The reproduction data supplied to the buffer 7b of Ch2 is subjected to decoding processing of the reproduction data by the decoder 8b, and the decoded data
It is obtained at the output terminal 9b of h2.

In the optical disk 1 to be reproduced by the optical disk apparatus of this embodiment, spiral or concentric data recording tracks are formed, and Ch1 data and Ch2 data are recorded at two discrete positions on the recording tracks. Are individually recorded. Ch1 data and Ch
The second data may be either data having some relationship with each other or data having no relation at all.

In this embodiment, the two-channel data can be reproduced simultaneously. The two-channel data reproduction will be described below with reference to FIG. FIG.
Is a characteristic diagram showing a process of simultaneously reproducing Ch1 data and Ch2 data, in which the vertical axis shows the data amount, the horizontal axis shows the passage of time, and A in FIG. In this state, a track on which Ch1 data is recorded is reproduced in a range indicated by Ch1, and a track on which Ch2 data is recorded is reproduced in a range indicated by Ch2. In a range indicated by Tp, a seek control process for changing a reproduction track position of the optical pickup 2 is performed.
FIG. 2B shows the data storage amount of the buffer 7a for temporarily storing the reproduction data of Ch1, and FIG. 2C shows the data storage amount of the buffer 7b for temporarily storing the reproduction data of Ch2.

As shown in FIG. 2, in the case of this example, Ch1
And Ch2 are alternately reproduced from the optical disc 1 by two-channel data, and the buffer 7a for each channel is reproduced.
Or, a process of storing the data in the channel 7b is performed, and the reproduction data of each channel is continuously output from the buffers 7a and 7b of each channel, and the output terminal 9a of Ch1 and the output terminal 9b of Ch2 are output from each channel. Reproduction data is continuously output.

More specifically, for example, the optical pickup 2 is moved at the timing T0 (or the timing at which the reproduction instruction is first given) at which the minimum necessary data is stored immediately before the buffer 7a of the reproduction data of Ch1 is exhausted. The seek control is performed to set the track position where the data of Ch1 is recorded, and the changeover switch 6 is set to the buffer 7a side.
h1 is started to be read, and the data reading is stopped at a timing T1 when a fixed storage amount is reached.
The optical pickup 2 is moved to the track position where the data of Ch2 is recorded by the seek control over the time of p [sec], and the changeover switch 6 is set to the buffer 7b side. The timing T2 at which this track position is reached is immediately before the accumulation of the reproduction data of Ch2 in the buffer 7b is stopped.

At timing T2, data reading of Ch2 is started, and at timing T3 at which a fixed storage amount is reached, reading of this data is stopped. At time T4, the optical pickup 2 is controlled by seek control at timing T4. The track position where Ch1 data is recorded is set, and the changeover switch 6 is set to the buffer 7a side. Hereinafter, the process of controlling and reproducing the data so as not to lose the data stored in each of the buffers 7a and 7b is repeated, and the data of two channels is reproduced simultaneously. Here, as shown in FIG. 2, the period during which the data of Ch1 is read is T _A , and the period during which the data of Ch2 is read is T _B.

The system controller 10 controls the track address. The system controller 10 stores the track address when the reading of the data of each channel from the disk is temporarily stopped, and stores the track address of the data of the channel. When reading is resumed, seek control is performed so that reproduction is resumed from the track address. The time Tp [sec] required for one seek process is set to a time corresponding to the time required to move the optical pickup 2 from the innermost circumference to the outermost circumference of the disk, for example. When the reproduction is first started from the disk, the data of Ch1 is read out and accumulated to some extent in the buffer 7a, and the data of Ch2 is read out and accumulated to some extent in the buffer 7b. , The output of data is started simultaneously, and the output terminals 9a and 9b
From the same time.

The maximum storage capacity and the minimum storage capacity of the buffers 7a and 7b are determined by the transfer rate for reading data from the disk, the data transfer rate of each channel, the time, and the like. In this case, two buffers 7a, 7
The maximum data storage amount of b and the minimum required data storage amount are not always the same.

The example shown in FIG. 3 shows an example in which the transfer rate of the data of Ch1 and the transfer rate of the data of Ch2 are different in the case of simultaneously reproducing the data of two channels. In this example, the transfer rate at which the optical pickup 2 reproduces data from the disk is the same for each channel, and the buffers 7a, 7
Regarding the transfer rate at which the data stored in b is output, Ch1 is a relatively large rate and Ch2 is a relatively small rate.

The processing shown in FIG. 3 is performed at a timing T0 (or a timing at which a reproduction instruction is first given) at which the minimum necessary data is stored immediately before the buffer 7a of the reproduction data of Ch1 is exhausted. Pickup 2
Is set to the track position where Ch1 data is recorded by seek control, and the changeover switch 6 is set to the buffer 7a side to start reading this Ch1 data, and stop this data reading at the timing T11 when a fixed storage amount is reached. Then, the optical pickup 2 is set to the track position where the data of Ch2 is recorded by the seek control over the time of Tp [sec], and the changeover switch 6 is set to the buffer 7b side. The timing T12 at which this track position is reached is
It is assumed that the reproduction data of Ch2 is stored immediately in the buffer 7b.

When the reading of the data of Ch2 is started at timing T12, the timing T at which a certain amount of storage is reached is reached.
At 13, the data reading is stopped. Here, a relatively short time from the timing T12 to the timing T13
become. At the timing T13, the optical pickup 2 is moved to the track position where the data of Ch1 is recorded by the seek control at the timing T14 with the time of Tp [sec], and the changeover switch 6 is set to the buffer 7a side. Thereafter, the process of controlling and reproducing the data so as not to lose the data stored in each of the buffers 7a and 7b is repeated, and the data of two channels having different data transfer rates are simultaneously reproduced.

Here, the relationship between the data transfer rate and the buffer capacity will be described. The transfer rate of the reproduced data supplied from the error correction processing unit 5 to the changeover switch 6 is represented by R
m, the transfer rates of the data of the respective channels output from the buffers 7a and 7b of the respective channels are Ra and Rb.
As shown in FIGS. 2 and 3, data reproduction of Ch1 and C
A period of one cycle in which data reproduction of h2 is repeated is defined as Tc, and one data reproduction period of Ch1 is defined as T _A and 1 of Ch2.
The data reproduction period times and T _B, when the time required for one seek treatment is Tp (second), the period Tc of one cycle is shown by the following equation.

[0027]

[Number 1] _{Tc = T A + T B +} 2Tp

Here, since the buffers 7a and 7b do not overflow or underflow, the following relationship is established.

[0029]

T _A · R _m = T c · R _A T _B · R _m = T c · R _B

Then, when the required buffer capacity is obtained,
Since it is necessary to keep the output rates Ra and Rb constant while data is not supplied, the capacity Ba of the buffer 7a is expressed by the following equation (3), and the capacity Bb of the buffer 7b is expressed by the following equation (4). Is shown.

[0031]

(Equation 3)

[0032]

(Equation 4)

If the output rates of Ch1 and Ch2 are the same value Rs, the transfer rate R
The ratio between m and the transfer rate Rs on the output side is as shown in Expression 5, and the required buffer capacity in this case is as shown in Expression 6.

[0034]

(Equation 5)

[0035]

(Equation 6)

By performing the setting and the reproduction process as described above,
Different data of two channels (two sequences) reproduced from the optical disc 1 can be simultaneously output from the output terminals 9a and 9b. In this case, since one optical pickup 2 is used in a time-division manner, the configuration of the apparatus can be greatly simplified as compared with the case where optical pickups are provided by the number of channels, and various servo controls of the pickup can be performed in the usual manner. It can be performed in the same way as during channel reproduction, and can be realized with simple control.

Here, the minimum buffer capacity obtained from the relationship between the transfer rate Rm for reproducing data from the disk with the optical pickup, the output rates Ra and Rb of the channels Ch1 and Ch2, and the seek time Tp is as follows. Are shown in Tables 1 to 3. Table 1 shows the minimum buffer capacity of the channel Ch1, and Table 2 shows the channel Ch2.
Table 3 shows the sum of the capacities of the buffers 7a and 7b of both channels. In Tables 1 to 3, the seek time Tp
, Three types of 0.5 seconds, 0.3 seconds, and 0.085 seconds are shown. A disk drive device having a seek time Tp of 0.085 seconds is the fastest speed device currently in practical use.

[0038]

[Table 1]

[0039]

[Table 2]

[0040]

[Table 3]

Here, among the buffer capacities described in Table 3, preferred examples are shown below.

[Example 1] (Transfer rate Rm) ≦ 35 [Mbps] (Seek time Tp) = 0.085 [sec] (Output rate Ra of channel Ch1) ≧ 10 [Mbps]
(Output rate Rb of channel Ch2) ≧ 10 [Mbps]
], A buffer capacity of at least about 5.7 [Mbit] is required. Example 1 can be applied, for example, when reproducing video signals and audio signals of the same capacity on both channels Ch1 and Ch2.

[Example 2] (Transfer rate Rm) ≦ 35 [Mbps] (Seek time Tp) = 0.085 [second] (Output rate Ra of channel Ch1) ≧ 10 [Mbps]
(Output rate Rb of channel Ch2) ≧ 0.768
The buffer capacity at [Mbps] requires a minimum of about 1.9 [Mbit]. In Example 2, for example, Ch1 is 10 [Mbps].
The video signal and the audio signal of the rate of
This can be applied to a case where an audio signal having a rate of 0.768 [Mbps] at h2 is reproduced.

[Example 3] (Transfer rate Rm) ≦ 35 [Mbps] (Seek time Tp) = 0.085 [second] (Output rate Ra of channel Ch1) ≧ 10 [Mbps]
(Output rate Rb of channel Ch2) ≧ 0.384
The buffer capacity at [Mbps] requires a minimum of about 1.8 [Mbit]. In Example 3, for example, Ch1 is 10 [Mbps].
The video signal and the audio signal of the rate of
This can be applied to the case where an audio signal compressed to a rate of 0.384 [Mbps] at h2 is reproduced.

Example 4 (Transfer rate Rm) ≦ 35 [Mbps] (Seek time Tp) = 0.085 [second] (Output rate Ra of channel Ch1) ≧ 10 [Mbps]
(Output rate Rb of channel Ch2) ≧ 0.448
The buffer capacity at [Mbps] requires a minimum of about 1.8 [Mbit]. In Example 4, for example, 10 [Mbps] at Ch1
The video signal and the audio signal of the rate of
This is applicable when reproducing an audio signal compressed to a rate of 0.448 [Mbps] at h2.

In each example, when the seek time Tp changes, the capacity required as a buffer changes correspondingly.

In the above description, an example in which two-channel simultaneous processing is applied to reproduction processing has been described. However, two-channel simultaneous processing can be applied to recording processing.

FIG. 4 is a diagram showing a configuration of a recording system, and Ch1
Recording data obtained at the recording data input terminal 11a of
The recording data obtained at the recording data input terminal 11b of Ch2 is supplied to separate encoders 12a and 12b to perform encoding processing for recording, and the encoded data of each channel is supplied to a separate buffer 13a.
a and 13b to be temporarily stored.

The recording data of each channel stored in the buffers 13a and 13b is transferred to the changeover switch 14
The output is alternately output and supplied to the correction code generation unit 15 to generate and add a correction code. At this time, switching of the changeover switch 14 is controlled by the system controller 10. Then, the recording data to which the correction code has been added by the correction code generation unit 15 is supplied to a recording RF processing unit 16 to perform RF processing for recording, and the processed recording data is supplied to the optical pickup 2, The light emission state is controlled, and data is recorded on a predetermined track of the optical disc 1. Alternatively, in the case of an optical disk (magneto-optical disk) that requires magnetic field modulation during recording, the recording data is supplied to a magnetic field modulation coil or the like.

Here, the address detection section 4 connected to the reproduction RF processing section 3 detects the address of the track on which data is recorded, and supplies the detected data to the system controller 10. Buffer 13
Control is performed to record the two-channel data supplied from a and 13b on separate tracks.

The data storage state of the two buffers 13a and 13b and the address control state of the track to be recorded by the optical pickup 2 are opposite to the states during reproduction described with reference to FIG. 2 or FIG. Control for switching the recording of two channels is performed so that the recording data storage amounts of 13a and 13b do not exceed the maximum storage capacity.
Regarding the relationship between the input rate and the output rate of the two buffers 13a and 13b, the input rate and the output rate at the time of reproduction, which are represented by the above-described formulas, are opposite to each other.

By performing recording processing with such settings,
Different input data of two channels (two sequences) obtained simultaneously at the input terminals 11a and 11b can be recorded on the optical disc 1. In this case, as in the case of the reproduction process, one optical pickup 2 is used in a time-division manner, so that the configuration of the apparatus can be greatly simplified as compared with the case where the optical pickups are provided by the number of channels.
Various servo controls of the pickup can be performed in the same manner as in normal one-channel recording, and can be realized by simple control.

In the above description, the case of performing simultaneous reproduction and simultaneous recording of two channels has been described, but the present invention is also applicable to simultaneous reproduction and simultaneous recording of three or more channels. That is, in the reproduction system, this can be dealt with by providing a buffer and a circuit at the subsequent stage of the buffer on three or more channels and setting the transfer rate and the like described in the above equation in a relationship corresponding to the number of channels.

In the above-described embodiment, the buffer memory included in the reproduction system circuit and the recording system circuit is configured to be individually provided for each channel. However, the storage area of one memory corresponds to the number of channels. It may be divided into a number and used as a buffer memory for each channel.

In the above description, simultaneous reproduction of a plurality of channels or simultaneous recording of a plurality of channels has been described. However, recording and reproduction can be simultaneously performed in a time-division manner. That is, a process for providing a buffer in both the recording system circuit and the reproduction system circuit to record data stored in the recording system buffer on the optical disk, and a process for storing data reproduced from the optical disk in the reproduction system buffer Are alternately performed in a time-division manner, so that continuously input data can be recorded on the disk and continuous output of data reproduced from the disk can be simultaneously performed. In this case, the recording data and the reproduction data may be irrelevant, but the data immediately after being recorded on the disk is reproduced, and the reproduction for confirming whether the data recording on the optical disk is correctly performed is performed. Is also good.

In the case of simultaneous reproduction of a plurality of channels, the memory required for the error correction processing by the error correction processing unit is prepared by the number of channels to be reproduced, and the error correction unit has a length of one error correction unit or less. It may be possible to deal with the case where the reproduction channel is switched. That is, the error correction processing unit normally stores data of several kilobytes to several tens of kilobytes in an internal memory and performs error correction processing, and when the channel for reproducing data is switched, If error is not dealt with, perform error correction 1
It is necessary to reproduce the reproduction data shorter than the constraint length when the reproduction is switched to the reproduction of the channel again.

Here, as shown in FIG. 5, the error correction memories required by the error correction processing section 5 are two memories 22a and 22b, which are used by the changeover switch 21 in conjunction with the switching of the reproduction channel. By switching between the memories 22a and 22b, the next time the same channel is reproduced, even if the reproduction data is shorter than one constraint length, if the data is reproduced from the continuation and input to the memory 22a or 22b, the error can be corrected correctly. When switching playback channels,
It is not necessary to consider the constraint length of error correction. In addition,
Other parts of the reproduction system circuit shown in FIG. 5 are the same as those of the reproduction system circuit shown in FIG.

FIG. 5 shows an example in which the error correction processing section of the reproduction system has a plurality of memories required for the correction processing. However, the memory required for the correction code generation processing of the recording system is not limited to the memory required for the correction code generation processing. It is good also as composition provided with two or more systems. In the case where the recording and the reproduction are processed in a time-division manner, the memory for the correction code generation and the memory for the error correction processing may be different memories.

In the above-described embodiment, an example in which the present invention is applied to an apparatus for recording or reproducing an optical disk is described. However, the present invention can of course be applied to a method and an apparatus for recording or reproducing another recording medium. It is. That is, a plurality of buffer means for temporarily storing a plurality of independent recording data or reproduction data separately, and the recording data stored in each buffer means are recorded in different recording areas in a time-division manner, and different recording As a configuration including a pickup (optical pickup, magnetic head, or the like) that reproduces data recorded in the area in a time-division manner, various recording media can be used as long as the recording medium can be recorded or reproduced by the pickup. For example, the present invention can be applied to a so-called hard disk which records data on a magnetic disk using a magnetic head and reproduces recorded data from the magnetic disk.

[0060]

According to the recording method of the first aspect,
Since recording processing is performed on a plurality of recording areas in a time-division manner, simultaneous recording of a plurality of independent information on a recording medium can be easily performed with simple processing.

According to the recording method of the second aspect, in the recording method of the first aspect, the transfer rate at which the temporarily stored recording data is recorded on the recording medium is set to be smaller than the transfer rate of the plurality of recording data. By setting the data rate to a higher rate, and by setting the storage capacity for temporary storage with the data amount obtained from each transfer rate and the maximum seek time of the means for recording on the recording medium, time-division of a plurality of independent information Recording can be controlled well.

According to the recording method of the third aspect, in the recording method of the first aspect, the timing of time-division recording is controlled based on the remaining amount of the temporarily stored recording data. Time-division recording can be controlled with good timing.

According to the recording method of the fourth aspect, in the recording method of the first aspect, the error correction code generation processing is individually performed on each of the temporarily stored recording data. The minimum unit to be recorded by division can be equal to or less than the unit to which the error correction code is added, and each information can be recorded in a time-division manner at an arbitrary timing.

According to the recording method of the present invention, at least one series of data is temporarily stored instead of the processing of recording a plurality of data in a time-sharing manner according to the first embodiment. The recording process of recording data on a recording medium and the process of reproducing the data recorded in this recording process from the recording medium and temporarily storing the data are performed in a time-division manner, so that the recorded data can be reproduced immediately after recording. Can be performed with simple control.

According to the recording apparatus described in claim 6, 1
Since one pickup performs recording processing on a plurality of recording areas in a time-division manner, simultaneous recording of a plurality of independent information on a recording medium can be performed with a simple configuration using one pickup.

According to the recording apparatus described in claim 7, in the recording apparatus described in claim 6, an optical disk is used as a recording medium, and recording on the optical disk is performed by an optical pickup. Simultaneous recording of a plurality of independent information can be performed with a simple configuration using one optical pickup.

According to the recording apparatus of the eighth aspect, in the recording apparatus of the seventh aspect, the control of recording the optical pickup in a time-division manner is performed based on the remaining storage capacity of the buffer means. As time-division recording of independent information, it is possible to satisfactorily record different information that is continuously input.

According to the recording apparatus of the ninth aspect, in the recording apparatus of the seventh aspect, a plurality of correction code generation means for generating an error correction code in the data to be recorded is provided, and each of the correction code generation means is provided with a separate buffer means. The recording data temporarily stored in the error correction code generating means is added to the error correction code by different error generation means.
The minimum unit to be recorded in time division can be equal to or less than the unit to which the error correction code is added, and each information can be recorded in time division at an arbitrary timing.

According to the recording apparatus of the tenth aspect,
7. A process in which at least one series of data is temporarily stored in a first buffer means and the stored data is recorded in a recording medium, instead of the process of recording a plurality of data in a time-division manner according to claim 6. And the process of reproducing the data recorded in step 2 from the recording medium and temporarily storing the data in the second buffer means in a time-division manner, so that the recorded data can be reproduced immediately after recording using one pickup. It is possible with a simple configuration.

According to the reproducing method of the eleventh aspect,
Since reproduction processing from a plurality of recording areas is performed in a time-division manner, simultaneous reproduction of a plurality of independent information from a recording medium can be easily performed with simple processing.

According to the reproducing method of the twelfth aspect,
12. The reproduction method according to claim 11, wherein a transfer rate at the time of reproducing and temporarily storing the data from the storage medium is set to a rate higher than a transfer rate of the plurality of reproduction data, and at the same time, each of the transfer rates and reproduction from the recording medium By setting the storage capacity for temporary storage based on the amount of data obtained from the maximum seek time of the means for performing the operation, time-division reproduction of a plurality of independent information can be favorably controlled.

According to the reproducing method of the thirteenth aspect,
In the reproduction method according to the eleventh aspect, the control of the timing of reproduction in a time-division manner is performed based on the temporarily stored remaining amount, so that the control of the time-division reproduction can be performed with good timing.

According to the reproducing method described in claim 14,
12. The reproduction method according to claim 11, wherein each of the reproduction data reproduced from the storage medium is individually subjected to an error correction process, and the individually error-corrected reproduction data is temporarily stored individually. Thus, the minimum unit to be reproduced in time division can be equal to or less than the unit to which the error correction code is added, and each information can be reproduced in time division at an arbitrary timing.

According to the reproducing apparatus of the fifteenth aspect,
Since one pickup performs a time-divisional reproduction process from a plurality of recording areas, simultaneous reproduction of a plurality of independent information from a recording medium can be achieved with a simple configuration using one pickup.

According to the reproducing apparatus of the sixteenth aspect,
16. The reproducing apparatus according to claim 15, wherein an optical disk is used as a recording medium and reproduction from the optical disk is performed by an optical pickup.
Simultaneous reproduction of a plurality of independent information can be performed with a simple configuration using one optical pickup.

According to the reproducing apparatus of the seventeenth aspect,
17. The reproduction apparatus according to claim 16, wherein control for reproducing the optical pickup in a time-division manner is performed based on the remaining storage capacity of the buffer means, so that time-division reproduction of a plurality of independent information is continuously input. Records of each information,
Each piece of information can be reproduced and output continuously.

According to the reproducing apparatus of the eighteenth aspect,
17. The reproducing apparatus according to claim 16, wherein a plurality of error correcting means for correcting errors in the reproduced data are provided, and the reproduced data corrected by the plurality of error correcting means are temporarily stored in separate buffer means. Thus, the minimum unit to be reproduced in the time division can be equal to or less than the unit to which the error correction code is added, and each information can be reproduced in a time division at an arbitrary timing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a playback configuration according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing an example of a reproduction state according to the embodiment of the present invention.

FIG. 3 is a characteristic diagram showing another example of a reproduction state according to the embodiment of the present invention.

FIG. 4 is a block diagram showing a recording configuration according to the embodiment of the present invention.

FIG. 5 is a block diagram showing another example of the playback configuration according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk, 2 ... Optical pickup, 3 ... Reproduction RF
Processing unit, 4 ... address detection unit, 5 ... error correction processing unit,
7a, 7b buffer, 8a, 8b decoder, 12
a, 12b ... encoder, 13a, 13b ... buffer,
15: correction code generation unit, 16: recording RF processing unit, 22
a, 22b: Error correction memory

Claims (18)

[Claims] In a recording method of recording information on a predetermined recording medium, a plurality of independent recording data obtained continuously are temporarily stored separately, and the stored recording data are time-divided. A recording method for performing processing for recording in different recording areas of the recording medium. 2. The recording method according to claim 1, wherein a transfer rate at which the temporarily stored recording data is recorded on a recording medium is set to a rate higher than a transmission rate of the plurality of recording data. A recording method for setting the storage capacity to be temporarily stored with a data amount obtained from a transfer rate and a maximum seek time of means for recording on a recording medium. 3. The recording method according to claim 1, wherein: based on a remaining amount of the temporarily stored recording data,
A recording method that controls timing for recording in a time-division manner. 4. The recording method according to claim 1, wherein an error correction code generation process is individually performed on each of the temporarily stored recording data. 5. The recording method according to claim 1, wherein at least one series of data is temporarily stored instead of a process of recording a plurality of data in a time-division manner, and the temporarily stored data is recorded on a recording medium. A recording method in which a recording process for performing the recording process and a process for temporarily storing the data recorded in the recording process by reproducing the data from the recording medium are performed in a time-division manner. 6. A recording apparatus for recording information on a predetermined track of a predetermined recording medium, comprising: a plurality of buffer means for temporarily storing a plurality of independent recording data separately; and a plurality of buffer data stored in the respective buffer means. And a pickup for recording the recorded data in different recording areas in a time-division manner. 7. The recording apparatus according to claim 1, wherein an optical disk is used as the predetermined recording medium, and an optical pickup for irradiating the optical disk with a laser beam is used as the pickup. 8. The recording apparatus according to claim 7, wherein control for recording the optical pickup in a time-division manner is performed based on the remaining amount of the buffer means. 9. The recording apparatus according to claim 7, further comprising: a plurality of correction code generation means for generating an error correction code in the data to be recorded, wherein the recording data temporarily stored in each of the buffer means is provided. Recording devices in which error correction code addition processing is performed by different error correction code generation means. 10. The recording apparatus according to claim 6, wherein at least one series of data is temporarily stored in a first buffer means instead of a process of recording a plurality of data in a time-division manner. Processing for recording the stored data on the recording medium by the pickup, and processing for reproducing the data recorded in the processing from the recording medium by the pickup and temporarily storing the data in the second buffer means in a time-division manner. Recording device. 11. A reproducing method for reproducing information from a predetermined recording medium, wherein data recorded in different recording areas is reproduced in a time-division manner, and a plurality of independent reproduced data are temporarily stored separately. And a reproduction method for continuously outputting each reproduction data based on the temporarily stored data. 12. The reproducing method according to claim 11, wherein a transfer rate for reproducing and temporarily storing the data from a storage medium is set to a higher rate than a transfer rate of the plurality of reproduced data. A reproduction method for setting the storage capacity for temporarily storing the data amount obtained from the maximum seek time of the means for reproducing from the recording medium. 13. The reproduction method according to claim 11, wherein the control of the timing of reproduction in a time-division manner is performed based on the temporarily stored remaining amount. 14. The reproduction method according to claim 11, wherein each of the reproduction data reproduced from the storage medium is individually subjected to error correction processing, and the reproduction data subjected to the individual error correction processing is individually processed. The above-mentioned reproduction method for temporarily storing. 15. A reproducing apparatus for reproducing information from a predetermined track on a predetermined recording medium, wherein the pickup reproduces data recorded in different recording areas in a time-division manner, and the pickup reproduces the data in a time-division manner. A reproducing apparatus comprising: a plurality of buffer means for temporarily storing a plurality of independent reproduced data separately. 16. The reproducing apparatus according to claim 15, further comprising: an optical disk used as the predetermined recording medium, and an optical pickup for irradiating the optical disk with a laser beam and obtaining a reproduced signal from the return light as the pickup. Playback device. 17. The reproducing apparatus according to claim 16, wherein control for reproducing the optical pickup in a time-division manner is performed based on a remaining amount of the buffer means. 18. The reproducing apparatus according to claim 16, wherein a plurality of error correction means for correcting an error in the reproduced data are provided, and the reproduction data corrected by the plurality of error correction means is supplied to a separate buffer. A playback device for temporarily storing in a means.