JPH0831077A - Disk recording/reproducing device - Google Patents

Abstract

PURPOSE:To continue recording even when there is no free area of a disk during recording in an MD changer housing a plurality of disks. CONSTITUTION:A free area runs out during recording of a recordable disk housed in an MD disk stocker 19 by means of the MD recording/reproducing unit 29. In this case, by means of an MD control circuit 45, the content of a memory 10 for housing time stamp information of each track read from the UTOC area of each disk is retrieved, superposed recording is performed for the track having the oldest time stamp and recording is continued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording / reproducing apparatus for recording / reproducing an audio signal on / from a disc-shaped recording medium such as a magneto-optical disc.

[0002]

2. Description of the Related Art As an apparatus as described above, there is an MD (mini disk) system. The MD system records an audio signal on a rewritable magneto-optical disk by a digital method, and the digitized audio signal is an ATRAC (Adaptive TR).
Data is compressed by a high-efficiency encoding process called "amorphous acoustic coding", and magneto-optically recorded on the magneto-optical disk.

[0003]

By the way, in a CD player, a so-called CD changer which allows a plurality of discs to be mounted and selectively reproduces the plurality of mounted discs has been attracting attention. Various devices have been developed and sold in the CD changer, from those having a capacity of about 3 disks to those capable of accommodating up to 100 disks. In recent years, the above-mentioned MD system has been attracting attention as a recordable disc device. Using this MD system, a plurality of MD discs can be mounted and selectively recorded and reproduced in the same manner as a CD changer. Development and examination of MD changer is in progress.

Therefore, the present invention is intended to be applied to the MD changer as described above to add a useful function, and in particular, when the remaining recordable time of the disc is exhausted, the time stamp is applied. The oldest (recording date and time) is deleted and a new recording is performed instead.

[0005]

In order to solve the above-mentioned problems, the present invention provides a disc storage portion for storing a plurality of discs, and a disc recording / reproduction portion for recording / reproducing the discs stored in the disc storage portion. In a disc recording / reproducing apparatus having: a memory means for storing time stamp information of a recording track read from the UTOC area of each disc housed in the disc housing section; The present invention also provides a disk recording / reproducing apparatus having a recording control means for retrieving time stamp information stored in the memory means and recording the information on the track having the oldest time stamp.

[0006]

With the above-mentioned structure, even if an empty area runs out during recording on an arbitrary disc, the recording control means retrieves the information stored in the memory means to store the disc currently being recorded or the disc storage. Among the tracks recorded on the other discs stored in the unit, the track having the oldest time stamp is overwritten, so that the recording is continuously performed without interruption.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

First, FIG. 1 shows the structure of a disk storage mechanism portion of a disk recording / reproducing apparatus of the present invention. As shown in the figure, the device is a rotary donut-shaped MD disc stocker 19 capable of storing 16 MD discs.
And an MD recording / reproducing unit 29 for recording / reproducing an MD disc arranged in the central portion of the MD disc stocker 19.

Reference numeral 20 is an MD disc insertion slot for inserting an MD disc, and 21 is a first pull-in for pulling the MD disc inserted from the MD disc insertion slot 20 into the MD disc stocker 19. Rollers 22 are used for the MD recording / reproducing unit 2 to store the MD discs stored in the MD disc stocker 19.
A second pull-in roller that pulls into the inside of 9, a MD disc insertion sensor 23 that detects that an MD disc has been inserted into the disc insertion opening 20, and a first pull-in roller 24 that drives the first pull-in roller 21. A roller drive motor, 25 is a second pull-in roller drive motor that drives the second pull-in roller 22, 26 is an MD disc stocker rotating roller that rotates the MD disc stocker 19, and 27 is the MD disc stocker rotating roller 26. A MD disk stocker rotary roller drive motor for driving the disk drive, and 11 is a disk type hole detection switch.

In the MD recording / reproducing unit 29 shown in FIG. 1, 37 is a spindle motor for rotating an MD disk, 38 is an optical pickup, 39 is a feed motor for driving the optical pickup 38, and 45 is the entire apparatus. This is an MD control circuit that controls the control.

Next, FIG. 2 is a circuit block diagram showing the structure of the recording / reproducing system of the apparatus of the present invention shown in FIG. In the figure, 36 is an analog signal input terminal to which an analog information signal such as a voice signal is input, 35 is an A / D conversion circuit for converting the information signal input from the analog signal input terminal 36 into a digital signal, and 34 is The A / D
ATR for compressing the digital information signal output from the conversion circuit 35 and converting it into a highly efficient encoded digital signal
An AC processing circuit 33 is a digital signal processing circuit for interleaving the digital signal output from the ATRAC processing circuit 34, adding an error correction code, and converting it to a digital signal with a subcode signal added, and 32 is a head drive circuit. The output signal from the digital signal processing circuit 33 is converted by the recording magnetic head 31 into a signal for recording on the magneto-optical disk 30.

Further, 38 is an optical pickup for reading pit data from the magneto-optical disk 30 and converting it into a digital signal, 40 is a digital signal processing circuit for performing processing such as error correction on the signal read by the optical pickup 38, 41 Is an ATRA that expands the signal processed by the digital signal processing circuit 40 and restores the original digital signal.
C processing circuit, 42 is a D / A conversion circuit for converting a digital signal output from the ATRAC processing circuit into an analog signal, and 43 is an analog signal output terminal for outputting an analog signal output from the D / A conversion circuit 42. .

Further, 39 is a feed motor for reciprocally driving the optical pickup 38 between the inner and outer circumferences of the magneto-optical disk 30, and a servo control circuit 44 is operated by a tracking error signal output from the optical pickup 38. Controlled. 37 is a spindle motor for rotating the magneto-optical disk 30.

Reference numeral 45 denotes an MD control circuit for controlling the operation of the entire apparatus as described above, which shifts the mechanism to each mode of recording / reproducing / fast-forwarding / fast-returning and processing or sub-processing based on an input signal from the operation keys 12 or the like. Process the code data,
The digital signal processing circuit 33, the digital signal processing circuit 40, the servo control circuit 44, etc. are controlled. The MD control circuit 45 may be composed of a microcomputer.
Further, 10 is a memory for storing disk information and the like, and 9 is a display device.

FIG. 3 is a view showing a cross section of the magneto-optical disk 30. In FIG. 3, 50 is a lead-in area where disk information can be reproduced and 51 is a UTO.
Area where recording information can be recorded and reproduced in area C,
Reference numeral 52 is a program area in which music information can be recorded and reproduced, and 53 is a lead-out area.

There are two types of MD discs used in the MD system: a recordable disc made of a recordable and reproducible magneto-optical disc and a prerecorded disc made of a read-only optical disc.

FIG. 4 shows a cartridge of the recordable disc. The cartridge case 60 has a shutter 64, which is configured to slide in the direction of arrow D to expose the magneto-optical disk 30 inside the cartridge case 60 through a window (not shown) therebelow. There is. Further, the cartridge case 60 is provided with a disc type hole 63 and an erroneous erasure prevention hole 62, which are used to detect whether the disc is a pre-recorded disc dedicated to reproduction or a recordable disc capable of recording and reproducing, and a recorder. Recordable / unrecordable is detected on the Blu-ray disc. That is, 1) When the disc type hole 63 is released: a recordable disc 2) When the disc type hole 63 is not provided: It is a pre-recorded disc, and the slide member 65 is slid in the arrow E direction in the recordable disc, 1) When the erroneous erasure prevention hole 62 is closed: recording is possible 2) When the erroneous erasure prevention hole 62 is open: recording is not possible

Next, the basic operation of the disc recording / reproducing apparatus of the present invention will be described in detail.

In FIG. 1, when the user tries to insert the MD disc through the MD disc insertion slot 20 (position A), the MD disc insertion sensor 23 detects the MD disc, and the MD control circuit is detected accordingly. Reference numeral 45 activates the first pull-in roller drive motor 24 to rotate the first pull-in roller 21 and move the MD disc into the MD disc stocker 19. The MD disc that has been moved into the MD disc stocker 19 is stored in the MD disc stocker 19 (position B).

The MD disk stored in the MD disk stocker 19 is recorded / reproduced by the rotation of the second pull-in roller 22 at the time of recording / reproducing.
It is moved to the reproduction position (position C) and attached to the MD recording / reproducing unit 29. Then, when recording / reproducing another storage disk, the MD control circuit 45 controls the MD disk stocker rotation motor 26 to rotate the MD disk stocker 19 via the MD disk stocker rotation roller 26, and then, Then, the MD disc is moved to a position just before the second pull-in roller 22 (position B). Then, similarly to the above, the second drawing roller 22 is rotated to move to the disc recording / reproducing position (position C), and M
It is mounted on the D recording / reproducing unit 29. The audio signal to be recorded is supplied from the analog signal input terminal 36 shown in FIG.

Next, a method of recording on an MD disc, which is a feature of the present invention, will be described.

In this embodiment, the storage numbers [MD01] to
A case where five recordable discs [MD05] are stored will be described. The process of storing each recordable disc in the MD disc stocker 19 is as described above.

Now, it is assumed that the UTOC area of each of the stored recordable discs is reproduced to obtain the record information as shown in Tables 1 to 5 below and stored in the memory 10. In addition to the time stamp (recording date and time) information shown in the table below, the UTOC also records information such as track titles and artist names.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

[0028]

[Table 5]

Further, it is assumed that music is recorded on each recordable disc in the logical arrangement shown in FIG.

Here, the MD control circuit 4 allows the user to record on an arbitrary recordable disc using the operation keys 12.
5, the MD control circuit 45 searches for an empty area of the recordable disc, recognizes that there is an empty area in the recordable disc of storage number [MD4] and the recordable disc of storage number [MD5], and first, Point [P] of the recordable disc with storage number [MD4] (Fig. 5)
Start recording from (See).

When the time elapses and the point [Q] of the recordable disc with the storage number [MD4] is reached, the next free area is searched in the same way, and the [R] point of the recordable disc with the storage number [MD5] is reached. Start recording more.

As the time further passes, the storage number [MD5]
When the point [S] of the recordable disc is reached, the already recorded [TNO] on each recordable disc is reached.
The recording date and time of (track number) is searched to find the oldest [TNO] of the recording date and time. In the examples shown in Tables 1 to 5, after the record date and time of [TNO1] of the recordable disc of storage number [MD2] is the oldest, after the point [S] of the recordable disc of storage number [MD5] is reached. Performs recording continuously from point [X] of the recordable disc with storage number [MD2].

As time passes, the storage number [MD
When you reach the [Y] point of the recordable disc of [2],
Similar to the above, the recording date and time of the already recorded [TNO] is searched to find the oldest [TNO] of the recording date and time. In this example, since the recordable date and time after the recordable disc [TNO1] of the storage number [MD2] is [TNO5] of the recordable disc of the storage number [MD3], the recorder with the storage number [MD2] is recorded. After reaching the [Y] point of the bull disc, recording is continued from the [Z] point of the recordable disc of storage number [MD3]. After that,
When recording is continued, the same operation is repeated to continue recording.

In this embodiment, when the recording end point becomes the [M] point after the recording starts from the [Z] point of the recordable disc having the storage number [MD3], the MD control circuit 4
5 is the recorded signal [TNO] is [7] and the UTOC area of the recordable disc with storage number [MD3] is 1) TNO5 --- The recording start point is changed from [Z] to [M] 2 ) TNO7 --- Rewrite the recording start point to [Z] and the recording end point to [M].

Further, similarly to the above, after recording is started from the [Z] point of the recordable disc with the storage number [MD3], when the recording end point of the input signal becomes the [M] point, new recording is performed. With the input signal [TNO] as [5], the UTOC area of the recordable disc with storage number [MD3] is 1) TNO5 --- Recording start point is [Z], recording end point is [M] 2) Free area It may be rewritten from the point [M] to the point [N].

[0036]

As described above in detail, according to the present invention, it has a disc storage portion for storing a plurality of discs and a disc recording / reproducing portion for recording / reproducing the discs stored in the disc storage portion. In the disk recording / playback device
UTOC of each disc stored in the disc storage section
A memory means for storing the time stamp information of the recording track read from the area and a time stamp information stored in the memory means when the free area runs out during recording on any disc, and the oldest time stamp is obtained. Since it has a recording control means for performing overwriting on the tracks that it has, even if there is no recordable free area on the currently recorded disc, it is possible to continue recording without inserting a new disc. Therefore, it is extremely useful as a recording device for live recording and crime prevention.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a mechanism configuration of a disc recording / reproducing apparatus of the present invention.

FIG. 2 is a circuit block diagram showing a configuration of an audio signal processing portion.

FIG. 3 is a side sectional view of a main part showing the structure of a magneto-optical disk.

FIG. 4 is a view showing a cartridge of a recordable disc.

FIG. 5 is a diagram showing a recording state of a disc.

[Explanation of symbols]

9 display device 10 memory 11 disc type hole detection switch 12 operation key 19 MD disc stocker 20 MD disc insertion port 21 first pulling roller 22 second pulling roller 23 MD disc inserting sensor 24 first pulling roller drive motor 25 2 Pull-in roller drive motor 26 MD disc stocker rotary roller 27 MD disc stocker rotary roller drive motor 29 MD recording / reproducing unit 30 magneto-optical disc 31 recording magnetic head 32 head drive circuit 33 digital signal processing circuit 34 ATRAC processing circuit 35 A / D conversion circuit 36 analog signal input terminal 37 spindle motor 38 optical pickup 39 feed motor 40 digital signal processing circuit 41 ATRAC processing circuit 42 D / A Conversion circuit 43 Analog signal output terminal 44 Servo control circuit 45 MD control circuit 50 Lead-in area 51 UTOC area 52 Program area 53 Lead-out area 60 Disc cartridge 62 Erase prevention hole 63 Disc type hole 64 Shutter 65 Sliding member

Claims (1)

[Claims] 1. A disc recording / reproducing apparatus having a disc storage portion for storing a plurality of discs, and a disc recording / reproducing portion for recording / reproducing the discs stored in the disc storage portion. A memory means for storing the time stamp information of the recording track read from the UTOC area of each disk, and a search for the time stamp information stored in the memory means when there is no free area during recording on any disk. A disc recording / reproducing apparatus, comprising: a recording control unit for recording on a track having an oldest time stamp.