JPH02139782A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To output accurate commands such as the start time and end time of respective programs and to easily form the accurate contents of a TOC area by editing the contents of a TOC memory by a user's instruction during the reproducing of music information or the like in a program area. CONSTITUTION:A helical track 21 and absolute address information 22 are previously recorded in a recording area of a magneto-optical disk 1, the recording area is divided into an outer peripheral area and an inner peripheral area to form a program area 24 for recording/reproducing the program of recording information and a TOC (table of contents) area 23 in which additional information is recorded correspondingly to the absolute address information 22. Thus, the absolute address information corresponding to user specification is stored in a memory area as the start time or end time of each program and the contents stored in the memory means are rerecorded in the TOC area as the additional information. Since a user can previously recognize the contents of information at the time of recording music information, an accurate command such as the start time or end time of each program can be outputted at the time of reproducing the music information or the like.

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 in succession on a CD, and the innermost glue-in area contains a TOC (Table of CD) in which the recording start position of each image is recorded.
An information area called ``contents'' is set. When a CD is loaded into a playback device and played, the TOC information in the TOCTJ area is first played back, and this information determines the number of songs recorded on the loaded CD and the recording start time (position) of each stroke. etc., and during subsequent playback, any song can be accessed in a short time based on 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 in a concave-convex pattern on the disc is formatted in advance at the time of disc formation, and the recording/reproducing device uses the absolute address information to access unrecorded areas and control the CLV. It has been proposed to control the disc so that it can record the same signal frequency data as on a CD. Also, regarding the above TOC information, when the recording of music information etc. is finished, the TOC information is rewritten by associating the absolute address position 1 where recording started and the absolute address position where recording ended with the song number. It is possible that

Here, in recording by cable or wireless broadcasting, which is considered to be the most common recording format, or recording using other recording media as the source, multiple songs are often recorded consecutively, and in this case, each side Examples of numbering methods include a method in which the no-signal level between songs is detected and the song number is automatically incremented, and a method in which the user operates to increment the song number sequentially during recording. Proposed.

[Problem to be solved by the invention]

However, with the former method of numbering songs, malfunctions are unavoidable depending on the content of the song, and with the latter method of numbering songs, it may not be accurate unless the user knows the information of the song to be recorded in advance. The disadvantage is that it cannot be used in a variety of ways. That is,
In both methods, it is difficult to always accurately determine the start and end times of auditory information in real time. This becomes even more remarkable when the recorded information is not a song but a speech or the like.

[Means to solve the problem]

In order to solve the above-mentioned problems, a disc recording/reproducing apparatus according to the present invention has a recording device that has absolute address information, a program area for recording recorded information, and a TOC area for recording additional information of the recorded information. In a disc recording and reproducing apparatus using a recordable disc having a storage area, a memory means for sequentially storing operation keys operated by a user and contents of absolute address information corresponding to the operation time of the operation keys during playback of a program area. and a recording means for re-recording the contents stored in the memory means in the TOC area as additional information.

[For production]

According to the above configuration, after music information etc. are once recorded,
While playing back the music information, the user can specify, for example, the start time and end time of each side by operating the operation keys. and,
The absolute address information corresponding to this user specification is stored in the memory means as the start time, end time, etc. of each page, and the contents stored in this memory means are added as additional information.
It is re-recorded in the OC area.

Since the user can recognize the information content in advance when recording music information, it is possible to accurately specify the start time and end time of each side when playing back music information, etc. Even if you do this, you can redo it as many times as you like without destroying the music information in the program area.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. 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/reproducing apparatus according to the present invention, as shown in FIG. 2, a spiral track 21 and absolute address information 22 . Recorded in advance.

The recording area is divided into an outer area and an inner area, the outer area forming a program area 24 for recording and reproducing programs such as music information (recorded information) by the user, and the inner area forming at least one area. The song number for each piece of music information, 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 absolute address information 22... It forms the TOCei area 23.

The same format as the CD is used as the data format recorded in the TOC area 23 and program area 24. That is, as shown in FIG.
A frame a is constructed by adding a subcode C indicating the song number, time information, etc. and a frame synchronization signal indicating the beginning of the frame to each data field d to which a byte is added.
are recorded in sequence. However, the content of subcode C in the program area 24 in this embodiment may be anything and is not particularly limited. Also, TOC61 area 2
Subcode C in step 3 includes at least an absolute address position corresponding to the recording end position of a famous song for the information content in the playback-only CD format, or information corresponding to the length from the recording start position to the recording end position. will be newly included.

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 Information consisting of an address number g indicating an address that is sequentially incremented from the circumferential side (actually, it is also an absolute time of 1 second) and an error detection code h for checking for errors when recognizing the address number. A concavo-convex pattern is pre-recorded so that it can be reproduced once per second at a predetermined linear velocity.

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 concave-convex signal components forming the absolute address information 22 are reproduced as concave-convex 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 controls the entire disc recording and reproducing apparatus. A rotary encoder 7 that outputs a predetermined number of pulses per rotation 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 a CLV control circuit 8. There is. C.L.
(2) The 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, etc. of the signal reproduced by the optical head 3. A reproduction signal processing circuit 10 connected to the reproduction amplifier 9 processes reproduction data such as music information in the data format from the reproduction amplifier 9, extracts and arranges necessary data, and performs error correction processing as necessary. It is designed to do this. The TOC memory (memory means) 11 stores TOCjJ from among the signals processed by the reproduction signal processing circuit 10.
[The contents of area 23 are stored, and the contents of program area 24 are stored.
It is possible to sequentially store the contents of absolute address information corresponding to a user specification (specified by a repeat key 13, which will be described later) during playback. A display 12 is connected to the controller 6, and this display 1
2 is T.

The song number, time information, etc. are displayed in accordance with the contents of the C 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 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 output to the outside (Sout).

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 receives the digital audio data string from the A/D converter 15 or the TOC from the TOC memory 11.
A process is performed to convert the contents of the absolute address information corresponding to the user specification during reproduction of the program area 24 into a recording data string corresponding to the data format. The coil driver 17 drives the magnetic coil 18 according to the 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. Recording signal processing circuit 16, coil driver 17, and magnetic coil 1
8 constitutes a recording means for re-recording the contents stored in the TOC memory 11 in the TOCjl area 23 as additional information.

Here, control for keeping the linear velocity of the magneto-optical disk 1 constant will be described. When the magneto-optical disk 1 is loaded onto the spindle motor 2, the controller 6 controls an optical head moving mechanism (not shown) to move the optical head 3 to a radial position corresponding to the TOCjl 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. 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 determines the pulse frequency reference value of the rotary encoder 7 corresponding to the number of revolutions. ,
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. In addition, regarding 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 accuracy, 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 sequentially outputs accurate radial position information to the CLV control circuit 8 based on the absolute address value from the address decoder 5.
V control is executed regardless of the presence or absence of recorded information.

Next, recording of music information etc. will be explained. External (Sin
) is input to the A/D converter 1.
5, the recorded signal is converted into a digital signal by the recording signal processing circuit 16.
After the predetermined formatting is performed by
A magnetic field corresponding to recording data is applied to the magneto-optical disk 1 by a magnetic coil 18 via a coil driver 17 . 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 recording is performed by causing magnetization reversal by an 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.

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 9. After amplifying the data, it is returned to the original digital audio data by the playback signal processing circuit 1O,
The converter 14 outputs an external signal as an analog signal.
t).

Next, the recording/reproducing operation in the TOCfaJlf area 23 will be explained. The information content in the TOC area 23 is as follows:
For example, for each piece of music information recorded in the program area 24, its song number, recording start position, recording end position, etc. are indicated in correspondence with the above-mentioned absolute address information 22. When the magneto-optical disk 1 is loaded onto the spindle motor 2, the controller 6 moves the optical head 3 to the TOC area 23 as described above, rotates the magneto-optical disk 1 at a constant linear speed, and reads the contents of the TOC area 23. The information is 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.

The recording start position and recording end position corresponding to each song number in Table 1 correspond to the time information indicated by the absolute address information 22..., and are reproduced from TOCSMM2B5 and stored in the TOC memory 1.
1. The controller 6 is the TOC memory 1 mentioned above.
1, the above contents are displayed on the display 12. The user recognizes the contents of the recorded music information etc. from the display contents and, for example, if he wants to listen to the contents of the second song, he specifies it using the operation key 13, and the controller 6 receives the designation and then listens to the second song. 0 in table 1
Music can be selected by accessing the optical head 3 to the absolute address information position indicating 3"31". In addition, when reproducing music information, etc., in addition to the song number, the recording start time is subtracted from the absolute address information 22, which is sequentially reproduced starting from the recording start position, according to the contents of the TOC memory 11. By displaying this, the relative time (elapsed time) of each song is displayed on the display 12. Of course, it is also possible to display the above-mentioned absolute address information that is sequentially reproduced as an absolute address time. In this way, by using the contents of the TOC 61 area 23 and the sequentially reproduced absolute address information, useful display can be performed without particularly requiring the subcode information of the program area 24.

The contents of the TOC area 23 can be rewritten at the time when the recording of music information, etc.
When the TOC memory 11 is removed from the spindle motor 2 or manually specified by the 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. The contents of the TOC memory 11 are changed in the following manner, except when the TOC area 23 is reproduced.

The first form is something that is changed (updated) during the recording of music information, etc. in the program area 24. For example, the signal level and its elapsed time are changed at the analog or digital signal stage for the music information, etc. that is being recorded. If a predetermined condition is met, it is considered as an inter-song interval, and the start position of the inter-song is set as the end position of the previous song, while the end position of the inter-song is set as the start position of the next song, and the track number is also set. This is to change the contents of the TOC memory 11 one after another.

The second form is also changed (updated) during the recording of music information, etc. in the program area 24. For example, during the recording of music information, the user makes an assumption using the operation key 13, and makes the above-mentioned song interval judgment by himself. The contents of the TOC memory 11 are sequentially changed.

The third form is also changed (updated) during the recording of music information etc. in the program area 24, and the source of the music information etc. is a medium having a subcode, such as a CD or DAT.
(Digital Audio Tape), in which case more accurate information on each song is directly connected to the controller 6, and the contents of the TOC memory 11 are changed.

The above embodiments have been used in the past, and the first and second embodiments tend to have the drawbacks described above.

The fourth form is a form that can be realized by the present invention, and is updated (changed) during playback of music information, etc. in the program area 24. As a simple usage example of this form, the music information etc. in the program area 24 are continuously played back from the beginning, and the user presses the operation key 13 at a portion judged to be between songs. The controller 6 stores in the TOC memory 11 the value of the absolute address information 22 that is being reproduced at the time when the operation key 13 specifying between songs is pressed as the recording end position of the song before the operation key 13 is pressed. , operation key 13
The value of the absolute address information that is being played at the time the button is released is set as the recording start position of the next song, and the TO is set along with the next song number.
The data is stored in the C memory 11. In reality, it is sufficient that only the part where the song interval is specified using the operation key 13 is in the playback state.
It is possible to edit the TOC memory 11 in a short time by combining music selection with access and cue/review (early opening) such as that used in CD players.

Since the music information and the like here are contents that have been recorded and recognized by the user, it is easy to judge between songs, and the operation is significantly easier than in the first and second embodiments. Further, even if a mistake is made, it is possible to repeat the process as many times as necessary without destroying the contents of the music information, etc. in the program area 24.

In this way, in addition to the conventional TOC area information creation formats (the first to third formats described above), absolute address information that temporally corresponds to user-specified operations during playback of the program area 24 is stored in the TOC memory 11. In other words, by re-recording the contents of the TOC memory 11) and displaying according to the contents of the TOC memory, it is possible to create accurate TOC area contents without changing the music information etc. in the program area. Become.

In this embodiment, a disc recording and reproducing apparatus using a recordable disc compatible with the CD format is described, but the invention is not limited to this, and any device that can handle a recordable disc having absolute address information can be used. Bye. Of course, the recorded information may be video, code data, etc. in addition to music information, and the absolute address information is not limited to the format shown in the example, but may be in any other format as long as similar information can be obtained. It may be any form.

〔Effect of the invention〕

As described above, the disc recording/reproducing device according to the present invention has the following features:
In a disc recording and reproducing apparatus using a recordable disc having absolute address information and a recording area comprising a program area for recording recorded information and a TOC area for recording additional information of the recorded information, the disc recording and reproducing apparatus is operated by a user. a memory means for sequentially storing the contents of absolute address information corresponding to the operation time of the said operation keys during playback of the program area; and a TOC with the contents stored in the memory means as additional information.
This configuration includes a recording means for re-recording in the area.

Thereby, the contents of the TOC memory can be edited in response to user instructions while music information, etc. in the program area is being played back. Since the user recognizes the information content when recording music information, it is possible to give accurate commands such as the start time and end time of a famous piece, which makes it easy to create accurate TOCeB area content. can. In addition, even if a wrong specification is made, the user can record music with peace of mind, since the music information in the program area can be retried as many times as desired without destroying it. In particular, even if the information to be recorded is unpredictable, it can be recorded with sufficient margin. Therefore, it is possible to provide a disc recording and reproducing apparatus that can fully utilize the advantage of high-speed access of discs using accurate TOC information.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a schematic block diagram showing the circuit configuration of a disk recording/reproducing device, and FIG. 2 shows a recording format of a magneto-optical disk. FIG. 3 is a structural diagram showing the format of a recording signal l frame, and FIG. 4 is a structural diagram explaining the format of absolute address information. 1 is a magneto-optical disk, 11 is a TOC memory (memory means), 13 is an operation key, 16 is a recording signal processing circuit (recording means), 17 is a coil driver (recording means), 18 is a magnetic coil (recording means), 21 is a 22 is absolute address information, 23 is a TOC area, and 24 is a program area. Patent applicant: Sharp Co., Ltd.

Claims (1)

[Claims] 1. Disk recording using a recordable disk having absolute address information and a recording area comprising a program area for recording recording information and a TOC area for recording additional information of the recording information. In the playback device, a memory means for sequentially storing operation keys operated by a user and contents of absolute address information corresponding to the operation time of the operation keys during playback of a program area;
A disc recording and reproducing apparatus comprising: recording means for re-recording the contents stored in the memory means in a TOC area as additional information.