JPH0366086A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent reproduction of a head of an old music by accessing an optical head in the vicinity of an absolute address information position at a recording start point when rerecording is applied while recording is stopped on its way and applying still jump at a slightly preceding position. CONSTITUTION:Absolute address information A' of a spiral groove 20 on a magnetic disk 1 and of recording start by wobbling of the groove 20 is stored n a memory means 9 and when a recording interrupt command is inputted by an operation key 13, a controller 6 stops the recording to read the information A' and to allow an optical head 3 to access in the vicinity of the position of the information A' at the recording start of an old music and applies still jump to a slightly preceding position B to the position of the information A' to make the optical head 3 in standby. When the recording start command by the operation key 13 comes, the rerecording is started from a position C this side from the old recording start position A and complete overwrite rerecording is implemented. Thus, an even of reproduction of a head of an old music even for a slight time is prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a disc recording and reproducing device that is capable of recording and reproducing, for example, music information on a recordable disc having absolute address information. be.

[Conventional technology]

BACKGROUND ART Conventionally, so-called compact discs (hereinafter referred to as CDs), which are read-only discs in which music information and the like are converted into digital signals and recorded on disc-shaped recording media, have been known. Several songs are recorded consecutively on a CD, and the lead-in area on the innermost circumference contains a TOC (Table of CD) in which the recording start position of base oil is recorded.
An information area called ``contents'' is set. When a CD is loaded into a playback device and played, the TOC information held in the TOCfil area is first played back, and this information includes the number of songs recorded on the loaded CD, base oil recording start time (position), etc. , and in subsequent playback, any song can be accessed in a short time using the TOC information.

By the way, since the above-mentioned CD is for playback only, users cannot freely record their own favorite songs, etc., and there is a desire to develop a recording/playback device that can satisfy such requirements. As an example, a recording/reproducing apparatus using a rewritable magneto-optical disk can be considered. Regarding the recording method in this case, the disc linear velocity constant (CLV) used in CDs is used.
In order to perform Velocity control, absolute address information formed on the disc by a wobbling or uneven pattern is formatted in advance when the disc is formed, and the recording/reproducing device uses the absolute address information to write data to unrecorded areas. It has been proposed to perform access and CLVIII control so that data in the same signal format as a CD can be recorded.

In a disk recording/playback device using such a disk, for example, when recording a song using another recording medium as a source, the user judges the recording timing while listening to the song being played from the source, and then manually presses the operation keys. It is also possible to start recording by operating .

However, in such a song recording operation, the beginning of the song may be missing due to an incorrect recording start timing, and the user may notice this and stop recording midway through and perform the recording operation again.

In this case, in order to start the re-recording at the same time as the start position of the circular song (recording failure song), the absolute address at the time of recording start is memorized, and when re-recording is performed, the above-mentioned absolute address is stored. It is conceivable to return to the address position and perform recording.

Specifically, as shown in FIG. 7, suppose that the recording of the failed recording song starts from the position A in the figure on the spiral group 21 (the recorded portion is indicated by hatching in the figure). ), when re-recording, after accessing the memorized absolute address information A' position of the start of recording, still
) Keep the light head on standby while jumping. At this time,
If a trunk jump is performed at position B in the figure, the path of the light spot will draw a one-turn loop as shown by the dotted chain line in the figure, and in its reproduction, it will make a one-turn loop as shown in Figure 8. The signal in the rotation section will be repeatedly reproduced.

[Problem to be Solved by the Invention] However, when the user operates the recording operation key at any time in the above-mentioned standby state, as shown in FIG. Records may be made. That is, the one-rotation loop in the above-mentioned standby state includes a circular music recording area, and recording of a new piece of music may be started in this circular music recording area.

In the above case, the old song in the A-C section will remain, and in such a case, the beginning of the circular song will be played for a short time, which will deteriorate the quality of the song. invite problems.

[Means to solve the problem]

In order to solve the above-mentioned problems, a disk recording and reproducing apparatus according to the present invention uses a recordable disk that has pre-recorded absolute address information and a program area for recording recorded information. In the apparatus, an operation key operated by a user and a memory means for storing contents of absolute address information corresponding to the time point when the operation key is operated to start recording recording information;
When the user determines that there is a problem with the recording of the recorded information and performs a certain operation to record again, the optical head moves to a nearby position based on the absolute address information stored in the memory means. The present invention is characterized by comprising an optical head drive control means for returning the absolute address information position and performing a stay jump at a position slightly before the absolute address information position to put the optical head on standby.

[Operation] According to the above configuration, since the absolute address information for the start of recording of the old information is stored in the memory means, when rerecording the information, the optical head can be quickly moved to the vicinity of the recording start position of the old recorded information. access, and requests for re-recording can be quickly responded to. Then, the optical head performs a stay jump and is on standby at a position slightly before the absolute address information position corresponding to the recording start position of the old recorded information, so in this standby state, the area within the one rotation loop is There is no old recorded information, and when re-recording is started, recording will be started from before the old recording start position. As a result, complete overlapping re-recording is performed, and it is possible to reliably prevent a situation in which the leading part of the old recorded information is reproduced, albeit for a short time.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. In this embodiment, a magneto-optical disk is used as the disk, and music information and the like are recorded and reproduced in a data format standardized for so-called CDs.

In the disk recording and reproducing apparatus according to the present invention, as shown in FIG. 3, a spiral group 20 and absolute address information by wobbling of this group 20 are provided on the magneto-optical disk 1 at least in a recording area to be recorded and reproduced. Recorded in advance. The recording area is divided into an outer area and an inner area, the outer area is a program area for recording and playing back programs such as music information (recorded information) by the user, and the inner temporal area is a At least the song number for each piece of music information, its recording start position, recording end position, etc. (additional information) form a TOC area in which are recorded in correspondence with the absolute address information. T
The same format as the CD is used as the recording data format in the OC81 area and program area. That is, as shown in FIG. 5, for each data field d, in which 8 bytes of parity for error detection and correction are added to 24 bytes of data such as music information, a subcode C indicating the life number, time information, etc. Frames a, which are constructed by adding a frame synchronization signal indicating the beginning of the frame a, are sequentially and continuously recorded.

As shown in Fig. 6, each of the above absolute address information includes a preamble e for playback synchronization, an address mark f indicating the beginning of the absolute address information, and a preamble e for playback synchronization, an address mark f indicating the beginning of the absolute address information, and a Information consisting of an address number g indicating an incremented address (also an absolute time in a predetermined unit) and an error detection code h for checking errors during address number recognition is transmitted per second at a predetermined linear velocity. It is pre-recorded in wobbling format so that it can be played back at a predetermined rate.

On the other hand, in a disk recording/reproducing apparatus on the driver side, a magneto-optical disk 1 is rotated by a spindle motor 2, as shown in FIG. A CLV control circuit 8 is connected to the spindle motor 2.
This CLV control circuit 8 is designed to control the rotation of the spindle motor 2 at a constant linear velocity.

The optical head 3 records and reproduces information by irradiating a magneto-optical disk 1 with a laser beam. The signal reproduced by this optical head 3 is amplified via a reproduction amplifier 4, but a prior information signal component that constitutes absolute address information is extracted by a pre-recorded information detection section (BPF) 7. It is input to the absolute address decoder 5. The absolute address decoder 5 recognizes the address value based on the prior information signal and outputs it to the controller 6. The controller 6 controls the entire disc recording and reproducing apparatus.

A display 12 is connected to the controller 6, and is capable of displaying song numbers, time information, and the like. The controller 6 also includes operation keys 13.
is connected, and the user can make various specifications using this operation key 13.

The reproduction amplifier 4 connected to the optical heater 3 also amplifies the magneto-optical signal component corresponding to music information, etc. of the signal reproduced by the optical heater 3. A reproduction signal processing circuit 10 connected to the reproduction amplifier 4 processes reproduction data such as music information in the data format from the reproduction amplifier 4, extracts and arranges necessary data, and corrects errors as necessary. It is designed to be processed. The digital audio data string from the reproduced signal processing circuit 10 is converted into an analog signal by the D/A converter 14 connected to the reproduced signal processing circuit 10, and this analog signal is outputted to the outside (Sout). ing.

An analog signal from the outside (Sin), such as music information, is converted into a digital signal by an A/D converter 15, and this signal is output to a recording signal processing circuit 16. The recording signal processing circuit 16 includes an A/D converter 15
Processing is performed to convert a digital audio data string etc. from . The coil driver 17 drives the magnetic coil 18 in response to a recording signal from the recording signal processing circuit 16. The magnetic coil 18 is configured to apply an external magnetic field corresponding to a recording signal to the magneto-optical disk 1.

Further, memory means 9 is connected to the controller 6 . This memory means 9 is capable of storing the contents of absolute address information corresponding to the time point at which the operation key 13 is operated to start recording.

The optical head drive control means 11 performs focus and tracking control on the optical head 3 based on the output from the reproduction amplifier 4, and also controls when the user judges that the recording of the recorded information has failed and performs recording again. When a certain operation is performed, the optical head 3 is accessed to a nearby position based on the absolute address information stored in the memory means 9 based on a command from the controller 6 based on the operation, and the absolute address information is Perform a stay jump at a position slightly before the light head 3.
can be put on standby.

In the above configuration, control for keeping the linear velocity of the magneto-optical disk 1 constant will be described first. When the magneto-optical disk 1 is loaded onto the spindle motor 2, the optical head drive control means 11 controls an optical head moving mechanism (not shown) in response to a command from the controller 6 to move the optical head 3 to a radial position corresponding to the TOCjl area. At the same time, the controller 6 supplies the CLV control circuit 8 with disk radial position information corresponding to the above-mentioned radial position. The CLV control circuit 8 determines the necessary number of revolutions necessary to achieve a predetermined linear velocity based on the disk radial position information given from the controller 6, and controls it so that this becomes the same as the actual number of revolutions. The magneto-optical disk 1 is driven to rotate at a required linear velocity. Then, the absolute address information is reproduced by the optical head 3, and after being amplified by the reproduction amplifier 4, the absolute address information is recognized by the absolute address decoder 5 and inputted to the controller 6. Regarding the rotation control up to this point, considering variations in machine precision, etc., the disk radius position information does not necessarily match the actual position.
Therefore, the predetermined linear velocity is not accurate. At this stage, it is acceptable as long as the absolute address information is within a linear velocity error that can be reproduced and recognized. After that, the controller 6 sequentially outputs accurate radial position information to the CLV control circuit 8 based on the absolute address value from the absolute address decoder 5, so that accurate CLV control can be performed from now on regardless of the presence or absence of recorded information. Ru.

Next, recording of music information etc. will be explained. External (Si
The analog signal input from n) is converted into a digital signal by the A/D converter 15, and then sent to the recording signal processing circuit 1.
After the predetermined formatting is performed by the magnetic coil 18, a magnetic field corresponding to the recording data is applied to the magneto-optical disk 1 via the coil driver 17. In parallel with this, the optical head 3 emits a relatively high output DC light beam necessary for recording onto the magneto-optical disk.
Information recording is performed by lowering the coercive force of the portion where the temperature is locally raised by irradiation, and causing magnetization reversal by the applied magnetic field. Note that this method is generally called magnetic field modulation recording, and is a method that allows overwriting even in already recorded areas. Moreover, by irradiating the above-mentioned DC light beam, pre-recorded absolute address information can be reproduced simultaneously with the recording of such information.

On the other hand, in the reproduction operation of music information, etc., the optical head 3 detects the polarization component according to the magnetization direction of the laser beam irradiated onto the rotating magneto-optical disk 1 as the intensity of the light, and this signal is sent to the reproduction amplifier 4. After being amplified by the reproduction signal processing circuit 10, it is returned to the original digital audio data, and the D/A
The converter 14 outputs an external signal as an analog signal.
t).

Now, in recording music information, etc., as described above, for example, when recording a song using another recording medium as a source, the user judges the recording timing while listening to the song flowing from the source, and then operates the operation keys 13 himself. It is also possible to start recording by In such a song recording operation, the beginning of the song may be cut off due to an incorrect recording start timing, and the user may notice this and stop recording midway through and try again. be. In this case, in order to start the re-recording from before the starting position of the failed recording song, the absolute address information A' at the recording start point is stored in the memory means 9 as shown in FIG.
When re-recording, read out the above absolute address information A' and use the absolute address information A.
The optical head 3 is accessed close to the absolute address information A' position, and a stay jump is performed at a position B slightly before the absolute address information A' position to keep the optical head 3 on standby.

At this time, the path of the light spot waits while drawing a one-turn loop as shown by the dotted chain line in the figure.

The operations including the above operations and from the start of re-recording to the end of the recording will be explained using the flowchart of FIG. 2.

The recording operation is started in response to a recording start instruction from the user, and absolute address information A' of the recording start position A is stored in the memory means 9 (sl). Next, it is determined whether a recording termination instruction has been input (S2), and if there is no termination instruction, it is determined whether a recording interruption instruction has been input (S3).
Note that in this embodiment, the above-mentioned recording interruption instruction is a certain operation performed by the user in order to record again after determining that there is a problem in recording the recorded information.

If a recording interruption instruction is input, stop recording.34
), the absolute address information of the recording stop position is stored in the memory means 9.
(S5). Then, the optical head 3 is accessed near the position of absolute address information A' at the start of recording of the old song mentioned above, and a stay jump is performed at position B, which is slightly before this absolute address information A', and the optical head 3 is placed on standby. let Thereafter, the process moves to step 1, and if there is an instruction from the user to start recording, the re-recording operation is started (Sl).

According to such re-recording, the recording is started from a position C in front of the old recording start position A, as shown in FIG. 4, and thus complete overlapping re-recording is performed. Therefore, it is possible to reliably prevent a situation in which the beginning of an old song is played back for a short time.

When the end instruction for this re-recording is input (32), the process moves to step 7 and the absolute address information E of the re-recording end position is stored (S7). Next, it is determined whether such recording is a normal recording or a re-recording (S8), and if it is a re-recording, the position on the absolute address information that is the recording end position of the newly recorded song is the absolute address information that is the end position of the old song. 39), and if not, record silent data up to the absolute address information position 5IO), and then end the re-recording (39).
311).

Note that in this embodiment, silent data is recorded as described above, but this is not necessarily effective, and depending on the recording mode, it may be better not to do so. Therefore, such silent data recording will be performed as necessary.

〔Effect of the invention〕

As described above, the disc recording/reproducing device according to the present invention has the following features:
In a disk recording/playback device using a recordable disk having pre-recorded absolute address information and a program area for recording recorded information, an operation key operated by a user and an operation key for starting recording of recorded information are provided. memory means for storing the contents of the absolute address information corresponding to the point in time when the above-mentioned operation keys were operated; Optical head drive control that sometimes returns the optical head to a position near the absolute address information stored in the memory means and performs a stay jump at a position slightly before the absolute address information position to make the optical head wait. The configuration includes a means.

This makes it possible to quickly respond to requests for re-recording, as well as to ensure that complete overlapping re-recording is performed and that the beginning of the previously recorded information is not played back for a short time. It has the effect of being able to

[Brief explanation of drawings]

1 to 6 show one embodiment of the present invention. FIG. 1 is a schematic block diagram showing the circuit configuration of a disc recording/reproducing apparatus. FIG. 2 is a flowchart showing recording and re-recording operations. FIG. 3 is a schematic diagram showing the absolute address information position of recording start and the stay jump position in correspondence with the spiral group. FIG. 4 is a schematic diagram showing the absolute address information position of the start of recording and the stay-jaw position in correspondence with the time axis. FIG. 5 is a structural diagram showing the format of a recording signal l frame. FIG. 6 is a structural diagram illustrating the format of absolute address information. 7 to 9 show conventional examples. FIG. 7 is a schematic diagram showing the absolute address information position of recording start and the stay jump position in correspondence with the spiral group. FIG. 8 is a schematic diagram showing the absolute address information position of the start of recording and the stay-jaw position in correspondence with the time axis. FIG. 9 is a schematic diagram showing the position where re-recording is started in FIG. 8. 1 is a magneto-optical disk, 2 is a spindle motor, 3 is an optical head, 4 is a reproduction amplifier, 5 is an absolute address decoder, 6
is the controller, 7 is the pre-recorded information detection unit, and 8 is the CLV.
9 is a control circuit; 9 is a memory means 11 is an optical head drive control means; 13 is an operation key.

Claims (1)

[Claims] 1. Having pre-recorded absolute address information, and
In a disc recording/playback device using a recordable disc equipped with a program area for recording recorded information, an operation key operated by a user and an absolute value corresponding to the operation time of the operation key to start recording recording information A memory means for storing the contents of the address information, and when the user determines that there is a problem in recording the recorded information and performs a certain operation to record the recorded information again, the above-mentioned address information stored in the memory means is provided. The optical head drive control means returns the optical head to a position near the absolute address information based on the absolute address information, and performs a still jump at a position slightly before the absolute address information position to make the optical head wait. Disc recording and playback device.