JPH0335476A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To make useful information remain and to erase or rewrite only useless information by providing a control means for preventing a write protection area from being written. CONSTITUTION:The subject device is provided with an operating key 13 to be operated by the user, a memory means (TOC memory) 11 for storing individual write protection information for prescribed recorded information to be inputted by this operating key 13 and recording means 16-18 for rerecording contents stored in this memory means 11 as additive information into a TOC (Table of Contents) area. Then, the write protection area is prevented by the control means 6 from being written. By this method, the write protection for individual information is feasible, and the erasing and rewriting, etc., can be performed on useless information only while useful information remain unchanged.

Description

[Detailed description of the invention] [Industrial use 1! T] The present invention relates to a disc recording and reproducing apparatus that is capable of recording and reproducing, for example, music information on a recordable 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 and the like are converted into digital signals and recorded on disc-shaped recording media, have been known. A CD has several songs recorded in succession, and the innermost track-in area contains a TOC (Table of CD) in which the recording start position of the wound song 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 TOC area is first played back, and this information allows information such as the number of songs recorded on the loaded CD and the recording start time (position) of each time. recognized, and T in subsequent playback.
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, which is 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 to It has been proposed to perform access to the recording section and control the CLV so that data in the same signal format as a CD can be recorded. Also, regarding the TOC information, when recording of music information etc. is completed, the TOC information is rewritten by associating the absolute address position where recording started and the absolute address position where recording ended with the song number. is possible.

Now, if users are able to freely record their favorite +To's, etc., they may want to keep the important songs they particularly like forever. In contrast, it is conceivable to apply write protection on a disk-by-disk basis.

[Problems to be Solved by the Invention] However, if write protection is applied to each disc, all recorded information on the disc will be uniformly write protected, and each song cannot be individually written. There are no words to protect you. For this reason, it is not possible to erase or rewrite only the useless songs while leaving the useful songs on a single disk, and there is a drawback that the advantages of a rewritable disk cannot be fully utilized. This drawback applies not only when the information is the above-mentioned song (music information) but also when the information is ordinary data.

The invention of claim 1 solves the above problem, but when writing protection is performed for each song according to the invention and a new song is recorded in a non-write protected area, the recording of this song is The capacity of the non-write-protected area may be smaller than the required capacity, and when playing back such a recording, the playback of the newly recorded song will end midway, and the write-protection will be performed at the same time as the playback of the newly recorded song. The recorded songs will start playing in the area,
This has the disadvantage that it can make the listener feel uncomfortable, such as the feeling of the end of the song ending. The invention of claim 2 solves this drawback.

[Means to solve the problem]

The disk recording and reproducing device according to claim 1 has absolute address information, and also has a program area for recording recording In information and a T area for recording additional information of the recording information.
In a Y-isk recording and reproducing apparatus using a rewritable disk having a recording area including an OC area, an operation key operated by a user and individual write protection for predetermined recorded information input by the operation key are provided. A memory means for storing information, a recording means for re-recording the contents stored in the memory means in the TOC area as an addition↑11 report, and a control means for preventing writing to the write protect area. It is characterized by having the following.

Further, the disc recording and reproducing apparatus according to claim 2 includes:
In the apparatus according to claim 1, at least when the recording information is recorded in the non-write protected area, if the capacity of the recorded information is larger than the capacity of the non-write protected area, the non-write protected area is recorded just before the end of the non-write protected area. It is characterized by having a fader circuit that adds fade-out processing to recorded information.

[For production]

According to the configuration of the invention as claimed in claim 1, it is possible to write protect each piece of information, so only useless information can be erased or rewritten while leaving useful information, and the advantages of a rewritable disk can be fully utilized. can be demonstrated.

Furthermore, according to the structure of the invention as claimed in claim 2, since the recorded information is faded out before the end of the non-write protected area, when the recorded information is a song and is played back, the fade-out process is applied to the recorded information just before the end of the non-write protected area. The sound gradually decreases before the end, and the sound ends without any sense of ending, so the listener will not feel uncomfortable.

[Embodiment 1] An embodiment of the invention as claimed in claim 1 will be described below with reference to FIGS. 1 to 5. In this embodiment, a magneto-optical disk is used as the rewritable 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. 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) corresponds to the absolute address information u22... It forms the TOCv4 area 23 to be recorded.

As the data format recorded in the TOC area 23 and program area 24, the same format as that of the CD is used. 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 data such as 24 bytes of music information, a subcode C indicating the song number and time information, etc. Frames a constituted by adding a frame synchronization signal indicating the beginning of the frame 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 r 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. , a concavo-convex pattern is recorded in advance so that it can be reproduced once per second.

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 called uneven signals. The signal is amplified by a reproduction 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 not only controls the entire disc recording and reproducing apparatus, but also functions as a control means, which will be described later. A rotary encoder 7 is connected to the spindle motor 2, which outputs one rotation of light or a predetermined number of pulses in accordance with the rotation of the spindle motor 2, and the pulses from the rotary encoder 7 are output from the CL.
It is designed to be output to the V control circuit 8. 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, 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 TOC2M from among the signals processed by the reproduction signal processing circuit 10.
In addition to storing the contents of the area 23, it is also possible to sequentially store information specified by the user (specified using the operation keys 13, which will be described later). A display 12 is connected to the controller 6, and this display 12
In response to the contents of the TOC memory 11, the track number, time information, and write protect information for each episode are displayed. In addition, the controller 6 has operation keys 1
3 is connected, and the user can make various designations using this operation key 13.

The controller 6 also serves as a control means for controlling to prevent writing into the write protected area when there is an information recording command from the user. The means for inhibiting recording includes inhibiting the driving of the optical head 3 (emission of a relatively high output DC light beam necessary for recording) and controlling the controller 6 to control the transition to the information recording routine. There are methods to return to the routine of waiting for key human power.

The digital audio data string from the reproduced signal processing circuit IO 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 a digital audio data string from the to/D converter 15 or a T data stream from the TOC memory 11.
A process of converting the OC information into a recording data string corresponding to the data format described above is performed. 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 the magnetic coil 18, the contents stored in the TOC memory 11 are used as additional information in the TOCil area 23.
A recording means for re-recording is configured.

Here, control for keeping the linear velocity of the magneto-optical disk l 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 TOC? The disk is moved to a radial position corresponding to the X area 23, and the disk radial position information corresponding to the above-mentioned radial position is supplied to the CLV control circuit 8. 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. Absolute address information is output from the optical head 3 as a reproduction signal, which is amplified by a concavo-convex signal reproduction amplifier 4, and then recognized by an address decoder 5 and inputted to a controller 6. Regarding the rotation control up to this point, taking into consideration variations in mechanical precision, the position information of the disk half 1 motor does not necessarily match the actual position, 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.
LV 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 signal is converted into a digital signal by the recording signal processing circuit 1.
After the predetermined formatting is performed by the magneto-optical disk 6, a magnetic field corresponding to the recording data is applied to the magneto-optical disk l by the magnetic coil 18 via the coil driver 17. In parallel, the optical head 3 emits a relatively high-output DC light beam necessary for recording onto the magneto-optical disk 1.
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.

On the other hand, in the reproduction operation of music information, etc., the optical head 3 detects the polarized light 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 being amplified by the reproduction signal processing circuit IO, it is returned to the original digital audio data and output to the D/
The A converter 14 outputs an external (So
ul).

Next, the reproduction operation in the TOC8m region 23 will be explained. The information contents in the TOC area 23 include, for example, for multiple songs such as music information recorded in the program area 24, the song number, the recording start position, the recording end position, etc. correspond to the above-mentioned absolute address information 22... This is what was shown. 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 at a constant linear speed, and reads the contents of the TOC area 23. If the recorded information exists in the TOCjJ7 area 23, it is stored in the TOC memory 11.For example, suppose 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 l correspond to the time information indicated by the absolute address information 22..., and are reproduced from the TOC area 23 and stored in the T○C memory 11. . The controller 6 displays the contents of the TOC memory 11 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. 03° in table 1
Music can be selected by accessing the optical head 3 to the absolute address information position indicating 57. 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, T
By using the contents of the OC'pM area 23 and the absolute address information that is sequentially reproduced, useful display can be performed without particularly requiring the subcode information of the program area 24.

Next, the operation of applying write protection to each song will be explained. Similarly to the above, the user recognizes the contents of the recorded music information etc. from the display contents, and for example,
As shown in the figure, when it is desired to apply write protection to the first and third songs, the controller 6 receives the designation and stores the information in the TOC memory 11 by designating this using the operation key 13. Note that, as shown in the figure, write protection may also be applied to a song interval provided after the end of a write-protected song at the same time as the song is specified.

T with the contents of the TOC memory 11 as additional information.

Regarding the operation of copying to the Cjl area 23, for example, when removing the magneto-optical disk l from the spindle motor 2,
The content of the TOC memory 11 is converted into a predetermined format by the recording signal processing circuit 16 according to the manual designation of the operation keys 13 at a time when the user deems it necessary, and then the same recording process as described above is performed. Therefore, even if the disc is ejected from the disc recording/reproducing apparatus, the write protect information is retained within the disc. Also, the next time you install a disk, the above write protect information will be changed to TO
The write protect information is read out from the CH area 23 and stored in the TOC memory 11, and recording control is performed according to its contents.The write protect information input once is valid unless updated, and each time the disc is recorded, the write protect information is Write protection is executed for the third song.

In this way, if it becomes possible to apply write protection to each song (information) individually, it will be possible to erase or rewrite only the useless information while leaving the useful information behind, which will fully utilize the advantages of rewritable disks. can be done.

In addition to write protection for each song, it is also possible to set various types of write protection; for example, it is also possible for the user to directly input time information to write protect only a portion of a song. . Furthermore, in the above example, if there is a recording instruction for the first or third song area, write protection is applied to this area, and a warning sound is emitted in addition to displaying that write protection is applied. You can also do it.

[Embodiment 2] An embodiment of the invention set forth in claim 2 will be described below with reference to FIGS. 6 and 7. Note that members having the same functions as those in the first embodiment will be denoted by the same reference numerals, and their explanations will be omitted.

In this embodiment, as shown in FIG. 6, a fader circuit 20 is provided in front of the A/D converter 15.
The fader circuit 20 is connected to the controller 6 described above. The fader circuit 20 inputs analog stage music information (recording signal) and also inputs the controller 6.
Based on the command, the music information is subjected to fade-out processing and then this processed music information is output to the A/D converter 15. Further, the controller 6 instructs the fader circuit 20 when to perform fade-out processing based on information in the TOC memory 11 (information taken in from the TOC area 23).

Here, as mentioned above, if the first and third songs are write-protected including the interval between songs, the time corresponding to the non-write protected area (recordable area) is 03° 57° ~ 08° ” 20 pa. That is, 4
There is a recordable area of 23 minutes and 23 seconds. For this, 2/4
When recording a song with a duration of 3 seconds or more, the song will cut off in the middle, so fade out at a predetermined timing.For example, as shown in Figure 7, When write protection starts from 08', which is the write protection start time, by monitoring the elapsed time while recording the song, etc.
At the time of 08゛13'' (1+), which is 7 seconds before 20'', the music information is faded out. In addition, it is set so that there will be silence 3 seconds before the end of the above 7 seconds, and the silence will be maintained for these 3 seconds, and there will be a 3 second gap between the new 2nd and 3rd songs. It is also possible to form a . Furthermore, in this embodiment, fade-out processing is applied to the music information that is input as an analog signal, but when music information is input as a digital signal, the fade-out processing can also be applied to the digital signal as it is. It is.

With the above configuration, when the second new song is played, the sound gradually becomes smaller before the end of the song, and the song ends without any sense of ending, so that the listener does not feel uncomfortable.

〔Effect of the invention〕

As described above, the disk recording and reproducing apparatus according to the invention of claim 1 has absolute address information and a programmer 1.2 that records recording information. A recording area comprising a TOC area and a TOC area for recording additional information of the recorded information;
A disk recording and reproducing apparatus using a rewritable disk having a rewritable disk includes: an operation key operated by a user; a memory means for storing individual write protection information for predetermined recorded information inputted by the operation key; This configuration includes a recording device that re-records the contents stored in the memory device as additional information in the TOC area, and a control device that prevents writing to the write-protected area.

This has the effect that the advantages of a rewritable disk can be fully utilized, such as erasing or rewriting only useless information while leaving useful information behind.

The disk recording and reproducing apparatus according to the invention of claim 2 is the apparatus according to claim 1, at least when the recording information is recorded in the non-write protected area, the capacity of the recorded information is the same as that of the non-write protected area. The configuration includes a fader circuit that applies a fade-out process to the recorded information just before the end of the non-write protected area if it is larger than the capacity.

Therefore, when the recorded information is a song, when it is reproduced, the sound gradually becomes smaller before the end of the song, and the song ends without a sense of ending, so that the effect of not giving an unpleasant feeling to the open hand is achieved.

[Brief explanation of drawings]

1 to 5 show an embodiment of the invention according to claim 1. 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 a recording signal l frame. Fig. 4 explains the format of absolute address information. It is a structural diagram. Figure 5 is an explanatory diagram showing the write protection status of the 1st to 31st songs. Figures 6 and 7 show an embodiment of the invention of claim 2. 6 is a schematic block diagram showing the circuit configuration of the disk recording and reproducing apparatus. FIG. 7 is an explanatory diagram showing the relationship between fader input signals and fader output signals, etc. 1 is a magneto-optical disk; 6 is a magneto-optical disk; is the controller (control means),
11 is TOC memory (memory means), 13 is 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),
20 is a fader circuit, 21 is a track, 22 is absolute address information, 23 is a TOC area, and 24 is a program area.

Claims (1)

[Claims] 1. Disk recording using a rewritable 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. The playback device includes an operation key operated by a user, a memory means for storing individual write protection information for predetermined recorded information inputted by the operation key, and the contents stored in the memory means as additional information. A disc recording/reproducing apparatus comprising: a recording means for re-recording to a TOC area; and a control means for preventing writing to a write-protected area. 2. At least, when recording information to a non-write protected area, if the capacity of the recorded information is larger than the capacity of the non-write protected area, fade-out processing is applied to the recorded information before the end of the non-write protected area. 2. The disc recording and reproducing apparatus according to claim 1, further comprising an additional fader circuit.