JP3130393B2 - Magneto-optical disk recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk recording / reproducing apparatus for recording / reproducing a rewritable magneto-optical disk, and more particularly to a mini-disk recording / reproducing apparatus (MD apparatus).
The present invention relates to a method for erasing already recorded music, which is suitable for the following.

[0002]

2. Description of the Related Art A mini disk (MD) is known as a rewritable magneto-optical disk. In the mini disc, a recordable area is provided outside the pit information recording area on the inner peripheral side. The recordable area has a user's stock area (U-TOC) and a program area. Instead of having no pits, a groove (groove) that guides the track is dug, and information is recorded along this groove. I do.

A groove undulates in a waveform, and the average frequency of a signal generated by the undulation (wobble) is 22.
The rotation of the disk is controlled to be 05 kHz.
Further, the absolute time (address information) from the recording start position is FM-modulated and recorded in the wobble.

[0004] Recording is performed by magnetization of a magnetic film. That is, the magnetic film is heated to a point above the Curie point by a laser spot, and a magnetic field that reverses according to a signal is applied thereto.
Upon cooling, a signal is recorded on the magnetic film as a change in magnetization direction. Such recording can also be performed on a part that has already been recorded. That is, overwriting (overwriting) is possible.

[0005] The management of the recording position is performed by the information recorded in the U-TOC. In the recording of the program area, a track number (TNO) is assigned to each song as a continuous natural number starting from 1, and information such as a start time, an end time, a title, and the like is recorded for each TNO. When the TNO and its associated information are deleted from the U-TOC, that part is treated as an unrecorded part.

When a disc is loaded into the apparatus, U
-The TOC information is read and the data is stored in the RAM of the device.
, And thereafter stored in the RAM
Management of recording and reproduction is performed by the OC information. When each song is recorded or erased, the stored contents of the RAM are changed, and the stored information is recorded in the U-TOC of the disk before the disk is removed from the device.

[0007] Erasing an arbitrary song recorded on such a mini-disc requires an arbitrary TNO by operating a key.
Is displayed, and pressing the erase key removes the TNO information from the U-TOC information.

[0008]

When an arbitrary piece of music is erased by the above-described method, there is a possibility that the TNO of the music to be erased is mistaken and an unintentional music is erased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a magneto-optical disk recording / reproducing apparatus in which only intended music is reliably erased.

[0010]

SUMMARY OF THE INVENTION A magneto-optical disk recording / reproducing apparatus according to the present invention is characterized in that the absolute time is FM-modulated and recorded on the waveform of a groove in a program area which is a recording / reproducing area of each music, and each recorded music is recorded. In a magneto-optical disc recording / reproducing apparatus for recording / reproducing a rewritable magneto-optical disc whose start time and end time are recorded in a user's stock area, the erasing of the recording information including the start time of an arbitrary music of the user's stock can be performed by erasing the music. By pressing the erase key during the performance, the title of the currently playing music is displayed, the information of the music is erased from the user's stock information stored in the RAM of the recording / reproducing apparatus, and the track number of the other music is read. Numbering and recording the contents of the RAM in the user's stock area before ejecting the magneto-optical disk from the device. It is those configured to divide.

In the magneto-optical disk recording / reproducing apparatus, the merging of two consecutive music pieces into one music number is performed by pressing a cancel key during performance of a music piece on the rear side of the two music pieces, The division of an arbitrary tune into two tunes is performed by pressing the insert key during the performance of the tune.

[0012]

According to the magneto-optical disk recording / reproducing apparatus of the present invention, when arbitrarily erasing a plurality of tunes from a plurality of tunes recorded on the disk, the tune is erased while listening to the tune as a performance state by fast-forwarding or searching. Pressing the key deletes the information of the song from the user's stock, so that other songs are not mistakenly erased.

When the information of the music is deleted from the user's stock information stored in the RAM of the recording / reproducing apparatus by pressing the erase key, the recording location of the music is thereafter treated as an unrecorded portion and overwritten. Can record a new song.

Since the storage contents of the RAM are recorded in the user's stock area of the disk before the magneto-optical disk is ejected from the apparatus, new user's stock information is stored in the RAM of the recording / reproducing apparatus when the disk is loaded again. The state that the music was erased during the previous loading is not changed.

Since merging and division of music are performed during the performance of the music, mistakes such as merging wrong music numbers and merging other music can be prevented.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magneto-optical disk recording / reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an MD recording / reproducing apparatus according to an embodiment of the present invention. In the figure, 1 is an MD mechanism for writing or reading information by rotating the mini disc 1a,
A disc motor 1d for rotating the mini disc 1a loaded by a loading mechanism (not shown) on a turntable, an optical pickup 1b for reading information from the mini disc 1a and heating the disc during recording, and a feed mechanism therefor. And a magnetic head 1c for applying recording information as a magnetic field to a laser heating section of the mini disk 1a to perform perpendicular magnetization, and a loading mechanism thereof.

Reference numeral 2 denotes an MD recording / reproducing circuit which controls the operation of the MD mechanism 1 and performs an A / D converter 1 during recording.
The audio digital data sent from 0 is compressed by the ATRAC (Adaptive Transform Coding) method and stored in the RAM 4, and when a predetermined amount of data is accumulated, reading is started, and the read audio compressed data is encoded into a CD-ROM format. After adding an error correction code and interleaving by the ACIRC method, the signal subjected to the EFM modulation is applied to the magnetic head 1c.

The MD recording / reproducing circuit 2 further performs EFM demodulation on the signal read by the optical pickup 1b at the time of reproduction, decodes a signal in CD-ROM format obtained by ACIRC demodulation, and stores it in the RAM 4 as compressed audio data. Further, the data stored in the RAM 4 is read, restored into audio data by the ATRAC method, and transmitted to the D / A converter 9.

The MD recording / reproducing circuit 2 further decodes information recorded on the disk and sends it to the controller 3, and adds subcode information to be recorded on the disk to information recorded on the disk in accordance with an instruction from the controller 3.

The controller 3 obtains the mechanism control information, the address information of the RAM 4, the address information of the disk and the information recorded from the disk from the MD recording / reproducing circuit 2, and the mechanism control information, the address control information of the RAM 4 and the information to be recorded on the disk. Is generated and sent to the MD recording / reproducing circuit 2.

The controller 3 further prepares and stores disc management information and disc additional information in the RAM 8, receives signals from the key matrix 6 or the infrared remote controller 7, controls other circuits, and controls the display 5. Send display information.

The RAM 4 temporarily stores information read from the disk and information to be recorded on the disk. The display 5 displays the display information sent from the controller 3 on a screen. The key matrix 6 sends an operation command to the controller 3 when operated by a user. The infrared remote controller 7 has the same function as the key matrix 6.

The RAM 8 is controlled by the controller 3 and temporarily stores disc management information and additional information to be recorded on the disc. The D / A converter 9 converts a digital audio signal having a sampling frequency of 44.1 kHz and a quantization number of 16 bits sent from the MD recording / reproducing circuit 2 into an analog audio signal. The A / D converter 10 converts the audio signal sent from the analog circuit to a sampling frequency of 44.1 kHz.
The signal is converted into a 16-bit quantization digital audio signal and sent to the MD recording / reproducing circuit 2.

FIG. 2 shows a front panel of the apparatus. In the figure, reference numeral 12 denotes a tray for loading a disc, and reference numeral 11 denotes a power switch. 13 to 20 are operation keys included in the key matrix 6.

Reference numeral 13 denotes a tray open key.
2 is opened and closed cyclically, and the processing operation at the time of disc ejection and mounting is started.
Reference numeral 14 denotes a title key which, when pressed in the display, displays the title of the music being played.

Reference numeral 15 denotes a TNO forward key, which instructs forward TNO. 16 is a TNO reverse feed key,
Instruct reverse feed. A play key 17 instructs a transition to a play state.

Reference numeral 18 denotes an erasure key for instructing erasure of a track being played. Reference numeral 19 denotes a track number insert key for instructing division of a track number. A track number cancel key 20 cancels the separation information of the two track numbers and merges the two tracks.

Next, the operation of this device will be described with reference to FIGS. First, the tray 12 is opened by pressing the tray open key 13, the disc is loaded, and the tray open key 13 is pressed, the disc is loaded, the disc management information written in the U-TOC of the disc and the disc Additional information (title,
The recording date and time are read and stored in the RAM 8.

At this time, the optical pickup 1b is at the start position of the TNO1 on the disk, the apparatus is in the stopped state, and the display unit 5 displays the elapsed time (SINGLE TIME) of the TNO1 at 00:00 as shown in FIG. Is displayed.

Next, when the user presses the title key 14 or a predetermined key of the infrared remote controller 7, the controller 3
The title of TNO1 is read from AM8 and FIG.
Is displayed on the display 5 as shown in FIG.

Next, when the user presses the forward key 15 or a predetermined key of the infrared remote controller 7, the controller 3
The title of the track next to TNO1 is read from M8 and displayed on the display 5 as shown in FIG.

Next, when the user presses the play key 17 or a predetermined key of the infrared remote controller 7, the reproduction from the start position of the TNO2 is performed according to the instruction of the controller 3, and the elapsed time of the TNO2 is calculated from the address data obtained from the disk. Then, the elapsed time of TNO2 is displayed on the display 5 as shown in FIG.

When the user presses the erase key 18 or a predetermined key of the infrared remote controller 7 while playing TNO2 in this manner, the controller 3 causes the MD recording / reproducing circuit 2
Is set to a pause state, and TNO2 and its title blink as shown in FIG. 3 (e).

In this state, when the erase key 18 or a predetermined key of the infrared remote controller 7 is pressed again, the controller 3 erases the flashing TNO management information and the disc additional information from the RAM 8 and renumbers the other TNOs. Then, the stored contents of the RAM 8 are changed, the next TNO after the erased TNO is searched and reproduced, and the elapsed time of the TNO is displayed as shown in FIG. 3 (f). .

In this state, when the user presses the title key 14 or a predetermined key of the infrared remote controller 7, the controller 3 reads out the title corresponding to the currently played TNO after the renumbering from the RAM 8 and reads out the title for a preset time in FIG.
The information is displayed on the display 5 as shown in FIG. After the title is displayed for a predetermined time, the elapsed time of the track is displayed as shown in FIG.

Next, when the insert key 19 is depressed, the controller 3 rewrites the TNO management information and the TNO additional information in the RAM 8 so that a new TNO is added starting from the currently playing position as a start position. As shown in FIG. 3 (i), the elapsed time of the currently played TNO is displayed.

When the user presses the title key 14 or a predetermined key of the infrared remote controller 7 in this state, the controller 3 reads out the title corresponding to the TNO during the performance after the renumbering from the RAM 8 and reads out the title for a preset time in FIG.
It is displayed on the display 5 as shown in (j). In this case, since the title corresponding to the new TNO has not been input, it becomes blank. After the title is displayed for a predetermined time, the elapsed time of the track is displayed as shown in FIG.

Next, when the cancel key 20 is depressed, the controller 3 removes the start position information of the currently playing TNO so that the TNO is cleared as if the TNO was removed.
The TNO management information and the TNO additional information are rewritten, and the elapsed time of the currently playing TNO is displayed as shown in FIG.

In this state, when the user presses the title key 14 or a predetermined key of the infrared remote controller 7, the controller 3 reads out the title corresponding to the currently played TNO from the RAM 8, and the controller 3 reads out the title for a preset time as shown in FIG. Is displayed on the display 5 as shown in FIG. Next, when the tray open key 13 or a predetermined key of the infrared remote controller 7 is pressed,
The controller 3 issues an instruction to stop sound output to the MD recording / reproducing circuit 2, moves the TNO management information and the TNO additional information in the RAM 8 to the RAM 4, and records them in a predetermined U-TOC recording area of the mini disk 1a. Thereafter, the disc cartridge is ejected to the MD recording / reproducing circuit 2. During this time, the display 5 displays the state as shown in FIG.

The embodiment is configured as described above.
Erase insert key 19 or cancel key 20
As in the case of 8, the operation may be performed by pressing twice.

[0041]

According to the magneto-optical disk recording / reproducing apparatus of the present invention, the erasing of the tune of the overwritable magneto-optical disk is performed during the performance of the tune, so that the erasing tune is confirmed by ear and the erasing mistake is made. Is prevented. In addition, the addition or erasure of the TNO also prevents mistakes.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an MD recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view showing a front panel of the MD recording / reproducing apparatus.

FIG. 3 is a diagram showing a display example of a display of the MD recording / reproducing apparatus.

[Explanation of symbols]

 Reference Signs List 1 MD mechanism 2 MD recording / reproducing circuit 3 Controller 4 RAM 5 Display 6 Key matrix 7 Infrared remote controller 8 RAM 9 D / A converter 10 A / D converter 14 Title key 18 Erase key 19 Insert key 20 Cancel key

Claims (2)

(57) [Claims] An absolute time is FM-modulated and recorded in a waveform of a groove in a program area which is a recording / reproducing area of each music, and a start time and an end time of each recorded music are recorded in a user's stock area. In a magneto-optical disk recording / reproducing apparatus for recording / reproducing a possible magneto-optical disk, erasing of recording information including a start time of an arbitrary tune of the user's stock can be performed by pressing an erase key during the performance of the tune by playing the title of the tune being played. Is displayed to erase the information of the song from the information of the user's stock stored in the RAM of the recording / reproducing apparatus, and renumber the track numbers of the other songs. A magneto-optical disk recording / reproducing apparatus configured to record the contents stored in the user's stock area. 2. The merging of two consecutive songs into one song number is performed by pressing a cancel key during the performance of the song on the rear side of the two songs, and the arbitrary song is merged into two songs. 2. The magneto-optical disk recording / reproducing apparatus according to claim 1, wherein division is performed by pressing an insert key during performance of the music piece.