JPH0335475A - Disk recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc recording and reproducing apparatus that is capable of recording and reproducing music information on and from a rewritable disc having absolute address information.

[Conventional technology]

BACKGROUND ART Conventionally, so-called compact discs (hereinafter referred to as CDs), which are read-only discs in which music information is converted into digital signals and recorded on a disc-shaped recording medium, have been known. In the Cp, several numbers are recorded consecutively, and in the innermost glue-in area, there is a TOC (Table of Co., Ltd.) in which the recording start position of the base oil is recorded.
An information area called ``tentS'' is set.

When a CD is loaded into a playback device and played, first the T
The TOC information possessed by the OCfl area is reproduced, and the number of tracks recorded on the loaded CD and the recording start time (position) of the base oil are recognized from this, and in subsequent reproductions, the TOC information is
Any song can be accessed in a short time using the OC 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 in the form of a concave-convex pattern or group wobbling is formatted in advance at the time of disc formation, and the recording/reproducing device uses the absolute address information. It has been proposed to record data in the same signal format as a CD by accessing the unrecorded portion and controlling the CLV. Regarding the TOC information, when the recording of the music information is finished, the TOC information can be rewritten by associating the absolute address position where recording started and the absolute address position where recording ended with the song number. Conceivable.

Here, when copying music information from a disc recording/playback device to an external recording device (analog copy),
As in the past, it is conceivable that the user sets the playback level or recording level in the disc recording/playback device on the playback side or the external recording device on the recording side while checking a level meter or the like.

[Problem to be solved by the invention]

By the way, when performing such copying work, the playback and recording levels are generally set so that the playback peak level value falls within the recording level tolerance of the external recording device, but peaks that appear only instantaneously Since the level must be monitored and the level set, the user is forced to perform difficult and time-consuming work.

[Means to solve the problem]

In order to solve the above-mentioned problems, the disc recording/playback device according to the present invention has absolute address information, and also includes a program area for recording music information and a TOC'ill area for recording additional information of the music information. A disc recording and reproducing apparatus using a rewritable disc having a recording area consisting of a peak level detection circuit for detecting a peak level of music information, a memory means for storing peak level information, and a memory means for storing peak level information. It is characterized by comprising a recording means for re-recording the contents in the TOC 81 area as additional information.

[For production]

According to the above configuration, when copying music information from a disc recording/playback device to an external recording device, the TOC
Good copying can be easily performed by effectively utilizing the peak level information recorded in the area.

For example, if you use peak level value information, which is peak level information, to automatically optimize the playback level based on this and then output the playback music information to an external recording device, the user can eliminate the troublesome level setting. This makes it possible to easily make good copies without having to do so.

Furthermore, for example, the peak level portion of the music information is repeatedly played back using the peak level occurrence position information that is the pick level information, and this repeated playback allows the user to easily play back and play the music information prior to actually recording the music information. You can set the recording level. That is, by repeatedly obtaining a peak level that appears only instantaneously as described above, playback and recording levels can be set easily and quickly.

Furthermore, for example, by using peak level value information, which is peak level information, a reference signal of the same level is generated based on this, and this generated reference signal is used to control the user's hand before actually recording music information. You can easily set playback and recording levels. That is, unlike a peak level that appears only instantaneously, the continuously outputted reference signal makes it possible to easily and quickly set the playback/recording level.

[Embodiment 1] An embodiment of the present invention will be described below based on FIGS. 1 to 4. In this embodiment, a magneto-optical disk is used as the rewritable disk, and the so-called CD
Music information is recorded and played back using a data format standardized in .

In the disk recording and reproducing apparatus according to the present invention, as shown in FIG. 2, a spiral track 21 and absolute address information 22 . Recorded in advance.

This recording area is divided into an outer circumference side area and an inner circumference side area, the outer circumference side area forms a program area 24 for recording and playing back a program of music information by the user, and the inner circumference side area forms at least a program area for each piece of music information. A TOCwi area 23 in which the song number, its recording start position and recording end position, or the length from the recording start position to the recording end position (additional information) are recorded in correspondence with the above-mentioned absolute address information 22...
Pear tail. TOC area 23 and program area 2
The same format as the CD is used as the recording data format for the CD. That is, as shown in Figure 3,
For each data field d, in which 8 bytes of parity for error detection and correction are added to 24 bytes of music information data, a subcode C indicating the song number and time information, etc., and a frame synchronization signal indicating the beginning of the frame are added. Frames a consisting of the following are sequentially and continuously recorded.

As shown in FIG. 4, each of the above absolute address information 22 includes 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 a sequentially incremented address (actually also an absolute time of 1 second) and an error detection code h for checking errors during address number recognition is transmitted at a predetermined linear velocity. In this case, a concave-convex pattern is recorded in advance so that it can be reproduced once per paper sheet.

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. The optical head 3 records and reproduces information by irradiating the magneto-optical disk 1 with a laser beam, and among the signals reproduced by the optical head 3, the uneven signal components forming the absolute address information 22 are reproduced as uneven signals. The signal is amplified by an amplifier 4. The address decoder 5 that receives the signal from the uneven signal reproducing amplifier 4 recognizes the address value from this signal and outputs it to the controller 6. The controller 6 is designed to control the entire disc recording and reproducing apparatus. A rotary encoder 7 that outputs a predetermined number of pulses per revolution in accordance with the rotation of the spindle motor 2 is connected to the spindle motor 2, and the pulses from the rotary encoder 7 are output to the CLVftIII'M circuit 8 and the controller 6. It looks like this. The CLV control circuit 8 controls the spindle motor 2 to rotate at a constant linear velocity based on the above pulses and the disk radial position information output from the controller 6.

Further, the reproduction amplifier 9 connected to the optical head 3 amplifies the magneto-optical signal component corresponding to music information among the signals reproduced by the optical head 3. The reproduction signal processing circuit lO connected to the reproduction amplifier 9 is connected to the reproduction amplifier 9.
The reproduction data of music information in the data format is processed, necessary data is extracted and arranged, and error correction processing is performed as necessary. The TOC memory (memory means) 11 stores T from among the signals processed by the reproduced signal processing circuit IO.

In addition to memorizing the contents of Cwi area 23, the user-specified (
information specified by the operation key 13 (described later), and
The controller 6 can store peak level value information, peak level occurrence position information, and the like. Controller 6 has display 1
2 is connected, and the Q display 12 displays song numbers, time information, etc. in accordance with the contents of the TOC memory 11. Further, an operation key 13 is connected to the controller 6, and the user can make various specifications using the operation key 13.

The reproduced signal processing circuit 10 includes a level control circuit 30.
is connected. The level control circuit 30 is configured to control the level of the reproduction signal output from the reproduction signal processing circuit 10 based on the level setting information output from the controller 6. Specifically, since the signal from the reproduced signal processing circuit 10 is output in digital form, this signal is subjected to predetermined arithmetic processing and then output. A D/A converter 14 is connected to the level control circuit 30, and the D/A converter 14 converts the digital audio data string that has passed through the level control circuit 30 into an analog signal. ) is output to.

The analog signal from the outside (Sin) that is music information is A.
The signal is converted into a digital signal by the /D converter 15, and this signal is output to the recording signal processing circuit 16. The recording signal processing circuit 16 receives the digital audio data string from the A/D converter 15 or the TOC memory 11.
A process of converting the C information into a recording data string corresponding to the data format described above is performed. The coil driver 17 operates the magnetic coil 1 according to the recording signal from the recording signal processing circuit 16.
Drive 8. The magnetic coil 18 is configured to apply an external magnetic field corresponding to a recording signal to the magneto-optical disk 1. recording signal processing circuit 16, coil driver 17,
The magnetic coil 18 constitutes a recording means for re-recording the contents stored in the TOC memory 11 in the TOC area 23 as additional information.

Further, the music information converted into a digital signal by the A/D converter 15 is also input to a peak level detection circuit 31. The peak level detection circuit 31 is
The peak level value of the music information is digitally detected and outputted to the controller 6. Then, the controller 6 determines the absolute address playback location at the time when the peak level value information from the peak level detection circuit 31 is input, that is, the peak level generation position. This can be done by, for example, monitoring the elapsed time while recording information.

Here, control for keeping the linear velocity of the magneto-optical disk 1 constant will be described. When the magneto-optical disk l is loaded onto the spindle motor 2, the controller 6 controls the optical head moving mechanism a (not shown) to move the optical head 3 to a radial position corresponding to the TOC area 23, and also controls the CLV control circuit 8. The disk radial position information corresponding to the above-mentioned radial position is supplied to the disk. Based on the disk radial position information given from the controller 6, the CLV control circuit 8 determines the necessary number of rotations required to achieve a predetermined linear velocity, determines the pulse frequency reference value of the rotary encoder 7 corresponding to the number of rotations, and By controlling the actual output pulse frequency of the rotary encoder 7 to be the same as the pulse frequency reference value, the magneto-optical disk 1 is rotated at the required linear velocity. Then, the optical head 3 outputs absolute address information as a reproduction signal, which is amplified by the concavo-convex signal reproduction amplifier 4, and then recognized by the address decoder 5 and input to the controller 6. Note that in the rotation control up to this point, the disk radial position information does not necessarily match the actual position, taking into account variations in mechanical strength, etc., and therefore does not reach an accurate predetermined linear velocity. 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 outputs accurate radial position information to the CL based on the absolute address value from the address decoder 5.
Since the signal is sequentially outputted to the V control circuit 8, accurate CLV control is executed thereafter regardless of the recorded information.

Next, a case where music information is recorded from another source will be explained. The analog signal input from the outside (Sin) is converted into a digital signal by the A/D converter 15, and after the predetermined formatting is performed by the recording signal processing circuit 16, it is converted into a digital signal via the coil driver 17 to correspond to the recording data. A magnetic field is applied toward the magneto-optical disk 1 by the magnetic coil 18. In parallel with this, the optical head 3 irradiates the magneto-optical disk 1 with a relatively high-output DC light beam necessary for recording, reducing the coercive force of the portion where the temperature locally increases. Information is recorded by performing magnetization reversal by an applied magnetic field. Note that this method is
This is generally called magnetic field modulation recording, and it is a method that allows overwriting even in already recorded areas.

When music information is recorded from other sources in this way, the peak level detection circuit 31 and controller 6 detect the peak level information and peak level occurrence position information of each time, and use these pieces of information. The data is stored in the TOC memory 11, and the contents of the TOC memory 11 are further recorded in the TOC area 23 of the disk 1.

The TOC area 2 uses the contents of the TOC memory 11 as additional information.
For example, for the operation of copying to magneto-optical disk 1.
When the TOC memory 11 is removed from the spindle motor 2 or specified by the user's manual operation key 13 at a time when the user deems it necessary, the recording signal processing circuit 16 converts the contents of the TOC memory 11 into a predetermined format, and then performs the same recording process as described above. It is executed by going through the process. Therefore, even if the disc is ejected from the disc recording/reproducing apparatus, the peak level information is retained within the disc. Next, when the disk is installed, the above peak level information will be changed to TOCjJ (area 2
3 and stored in the TOC memory 11, and recording control is performed according to the contents.

On the other hand, in the reproduction operation of music information, the optical head 3 detects the polarization component according to the magnetization direction of the radar light irradiated onto the rotating magneto-optical disk 1 as the strength and weakness of the light, and sends this signal to the reproduction amplifier 9. After being amplified, the signal is returned to the original digital audio data by the reproduction signal processing circuit 10, passes through the level control circuit 30, and is then outputted to the outside (Sout) as an analog signal by the D/A converter 14.

Note that the reproduction operation when copying the music information recorded on the disc 1 to an external recording device will be described in detail later.

Next, the reproduction operation for TOCj and I area 23 will be explained. The information contents in the TOC area 23 include, for example, for each episode of music information recorded in the program area 24, the song number, its recording start position and recording end position, and the peak level value information and peak level occurrence position described above. Information, etc. When the magneto-optical disk l is loaded onto the spindle motor 2, the controller 6 moves the optical head 3 to the TOCjM area 23 as described above, rotates the magneto-optical disk l at a constant linear velocity, and reads the T○C.
The contents of the area 23 are reproduced, and if recorded information exists in the TOC area 23, it is stored in the TOC memory 11. For example, assume that the information in Table 1 below is already recorded. Note that the peak level value is expressed as a hexadecimal number based on 2'S combination.

Table 1 describes the operation of copying music information from the disc recording/playback device to an external recording device based on the information.

For example, when you want to copy the first track, you can designate it using the operation key 13, and the controller 6 will receive the designation and copy the first track on the disk L.
Start playing the track. As mentioned above, the playback signal is
The reproduced signal processing circuit 1° returns the data to the original digital audio data, and after passing through the level control circuit 30, the D/
The A converter 14 outputs an external (So
uL).

Here, the controller 6 recognizes that the peak level value of the first song is 7AE8 in hexadecimal, sets the level adjustment amount of the level control circuit 3o based on this value, and uses the setting information to control the level. Output to circuit 30. The level control circuit 30 receives the level setting information from the controller 6 and performs arithmetic processing on the digital audio data to automatically optimize the playback level.

In this way, the music information at the optimized playback level is sent to the external recording device, so the user does not have to do the troublesome level setting himself, and can easily make good copies. It becomes like this.

Note that the peak level detection may be performed on the front side of the A/D converter 15, and the level control circuit 30 may be
It may also be provided after the /A converter 14.

Therefore, when copying music information, the level can be adjusted regardless of whether the signal is an analog signal or a digital signal.

Further, in this embodiment, when recording music information from a predetermined source in the disc recording/reproducing apparatus, the peak level of the music information is detected and the information is recorded as T.

Although the information is temporarily stored in the C memory 11, this operation may be performed when reproducing the music information after recording the music information from a predetermined source in the disc recording/reproducing device. That is, while playing back the music information recorded on the disc 1, editing operations such as adding the track number etc. may be performed and the current information is recorded in the TOC area. Sometimes each +Ll+
Detects the peak level for each time and stores that information in TOC memory 1.
1 may be stored.

[Embodiment 2] Another embodiment of the present invention will be described below based on FIG. Note that members having the same functions as those in the first embodiment are denoted by the same reference numerals, and their explanations will be omitted.

In this embodiment, the circuit configuration of the disc recording/reproducing apparatus is, as shown in FIG. 5, similar to the circuit configuration shown in FIG. 1, with the level control circuit 30 omitted. On the other hand, a controller 36 is provided instead of the controller 6. The controller 36 uses the peak level occurrence position information to perform control such that the peak level portion of the music information and its vicinity are repeatedly reproduced.

According to this configuration, the peak level portion and the vicinity thereof are repeatedly reproduced, and this reproduced signal is outputted to the external recording device before actually recording music information, and the level meter installed in the external recording device is outputted. The user can set the playback and recording levels while viewing the screen. In this case, since the peak level that appears only instantaneously can be repeatedly obtained as described above, level setting can be performed easily and quickly.

[Embodiment 3] Another embodiment of the present invention will be described below based on FIG. Note that members having the same functions as those in the first embodiment are denoted by the same reference numerals, and their explanations will be omitted.

In this embodiment, as shown in FIG.
2 are provided. The reference signal generation section 32 includes a level control circuit 30, a switch 33 that switches between reproduction and reference signal output, and an oscillator 34 that outputs a sine wave signal or the like at a constant level. This circuit has a configuration in which a switch 33 and an oscillator 34 are added to the circuit configuration shown in FIG.

The controller 6 recognizes the peak level value of the music information, and outputs setting information for setting the level adjustment amount of the level control circuit 30 to the level control circuit 30 based on this value. The level control circuit 30 receives the level setting information from the controller 6 and adjusts the level of the constant level sine wave signal outputted from the oscillator 34 so that the level becomes equal to the peak level. ,
The reference signal generated through such adjustment is output to the outside.

The above-mentioned reference signal is outputted to an external recording device prior to actual recording of music information, and the user himself/herself sets the playback/recording level using a level meter installed in the external recording device. In this case, unlike a peak level that appears only instantaneously, level setting is performed using a reference signal that is continuously output, so that level setting can be performed easily and quickly.

[Effects of the Invention] As described above, the disc recording and reproducing device according to the present invention has the following effects.
In a disc recording and reproducing apparatus using a rewritable disc having absolute address information and a recording area comprising a program area for recording music information and a TOC area for recording additional information of the music information, A peak level detection circuit for detecting a level, a memory means for storing peak level information, and a TOC using the contents stored in this memory means as additional information.
This configuration includes a recording means for re-recording in the area.

This has the effect that good copies can be easily made.

[Brief explanation of drawings]

1 to 4 show an embodiment of the invention set forth in claim 1. FIG. FIG. 1 is a schematic block diagram showing the circuit configuration of a disc recording/reproducing apparatus. FIG. 2 is a schematic diagram showing the recording format of a magneto-optical disk. FIG. 3 is a structural diagram showing the format of one frame of the recording signal. FIG. 4 is a structural diagram illustrating a formanode of absolute address information. FIG. 5 shows another embodiment, and is a schematic block diagram showing the circuit configuration of a disc recording/reproducing apparatus. FIG. 6 shows another embodiment, and is a schematic block diagram showing the circuit configuration of a disk recording/reproducing device.
OC memory (memory means), 13 is an operation key, 16 is a recording signal processing circuit (recording means), 17 is a coil driver (
18 is a magnetic coil (recording means), 21 is a track, 22 is absolute address information, 23 is a TOC area,
24 is a program area, 30 is a level control circuit, 31 is a peak level detection circuit, 32 is a reference signal generation section, 33 is a switch 2L34 is an oscillator.

Claims (1)

[Claims] 1. Disk recording using a rewritable disk having absolute address information and a recording area comprising a program area for recording music information and a TOC area for recording additional information of the music information. The playback device includes a peak level detection circuit that detects the peak level of music information, a memory means that stores the peak level information, and a TO that stores the contents stored in the memory means as additional information.
1. A disc recording and reproducing apparatus comprising: a recording means for re-recording in a C area.