JPS63214985A - Disk recorder - Google Patents

Abstract

PURPOSE:To properly recognize the size of an area which can be recorded by a user by detecting the area which can be recorded of a part which is not recorded or an unnecessary recording part or the like based on start address data and end address data recorded in a read in area and displaying address difference data indicating the area which can be recorded in a series from a smaller scale. CONSTITUTION:The data of musical performance information is recorded in the program area 6 of a disk 1 which can be recorded, after the recording operation of the data is completed, the start address data and the end address data of the data record information unit area of the program area 6 are recorded in the read in area 7 disposed in the internal periphery or the external periphery side of the disk 1. An area in which the address difference of more than a prescribed value between the end address of the information unit and the start address of the next information unit is defined to be the area which can be recorded to detect the area which can be recorded such as the part which is not recorded or the unnecessary recording part by a data processing means and display the address difference data in the series from the smaller one. Thereby, the size of the area which can be recorded can be properly recognized by the user.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example (G-1) Configuration of disk recording and reproducing device (No. Figure 1) (G
-2) Operation of disk recording/reproducing device (2nd vlJ to 5th vlJ)
Figure) H Effect of the Invention A Industrial Application Field The present invention relates to a disc recording device that records data such as performance information on a recordable disc to which an absolute address is given.
For example, it is commonly used in recordable and reproducible compact disc (CD) performance devices.

B. Summary of the Invention The present invention provides a disc recording device that records data such as performance information on a recordable disc to which an absolute address is given, and each information unit area in which data such as performance information is recorded in a program area of the recordable disc. Record start address data and end address data in the lead-in area, and create recordable areas such as unrecorded parts and unnecessary recording parts in the program area based on the start address data and end address data of each information unit area. By detecting the length of the recordable area and displaying it in descending order of length, the user can easily recognize the recordable area that matches the length of the information to be recorded.

C. Prior Art Conventionally, playback-only disk player devices such as CD players that play back so-called compact disks (CDs), in which audio signals such as voices and musical tones are digitized and recorded on optical disks, have been generally provided. All songs are recorded continuously on the compact disc (CD), and normally, even after the CD player has finished playing one song, it continues playing and continues to play the next song. It is designed to play.

Since conventional CD players are only for playback, they can record and play back using magneto-optical discs made of rewritable magneto-optical recording media, making them superior to compact discs (CDs). Development of disk systems that maintain compatibility has been progressing for some time.

Recordable disc 1 used in the above disc system
For example, as shown in the schematic diagram of FIG. 6, the depth λ/
8 (λ is the wavelength of the information recording laser beam) pre-groups 2 are formed in a spiral shape, and a land portion 3 between the pre-groups 2 has a depth λ/2 along the circumferential direction.
Embossed area 4 consisting of a concavo-convex pattern formed by pits 4
and data recording areas 5 where magneto-optical recording is performed are arranged alternately at equal pitches. The recordable disc 1 also includes a program area 6 in which performance information is recorded.
A lead-in area 7 is provided on the inner circumferential side of the program area 6, and a list (ToC: Tab
(le of Contents) information is recorded in the lead-in area 7.

Furthermore, in the embossed area 4 of the recordable disc l, a 24-bit synchronization signal and a 14-bit synchronization signal, which constitute one frame of the data format shown in FIG. symbol) subcode and 14 x 32 bits (32 symbols)
A 588 channel bit EFM (Eight t.

Among the modulation data (Fourteen Modulation), the synchronization signal and subcode are recorded as a concavo-convex pattern formed by embossing, and the subcode is absolute time information (absolute address) from the start position of the program area 6. is given.

In a disc system using the recordable disc 1, the absolute address reproduced from the embossed area 4 is used to maintain a constant linear velocity (CL V : C
on5tant Lenear Velocity)
to control the rotation of the disc, etc., and create a compact disc (
Information is recorded and reproduced in a standardized data format for CDs.

D Problems to be Solved by the Invention By the way, in a disc system that allows recording and playback and maintains upward compatibility with the above-mentioned compact disc (CD), it is difficult to record all songs on the disc continuously. For example, there may be a case where an unrecorded portion occurs between the first and second songs. In this case, if playback were performed continuously, the silent portion would continue to be played from the end of the first song until the start of the second song. In addition, when performing so-called overlapping recording, in which a new song is re-recorded in an already recorded section, if the original song remains after the newly recorded song, that section will also be played during playback. Put it away. Furthermore, when using a disc on which several songs have already been recorded and recording further into the recordable areas such as unrecorded areas or unnecessary recording areas, there is enough space to record new songs. It is necessary to determine whether there is a recordable area or not, and calculating the recorded time by locating the beginning of a song that has already been recorded requires a complicated operation. In addition, if unrecorded parts or unnecessary recorded parts exist in multiple locations, it may take a lot of effort to determine the recordable area necessary to record a new song. become.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention has been devised so that information can be recorded easily and efficiently in a disc recording device that records data such as performance information on a recordable disc to which an absolute address is given. The present invention aims to provide a disk recording device with a novel configuration that has a function of detecting recordable areas such as unrecorded areas and unnecessary recording areas on a recordable disk and displaying them in ascending order of size.

E. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention records data such as performance information in the program area of a recordable disk to which an absolute address is given, and also records data for the program area. recording means for recording start address data and end address data of the information unit area in which data has been recorded in the program area in a lead-in area provided on the inner or outer circumference side of the disk after the recording operation is completed;
Read the start address data and end address data of each information unit area recorded in the lead-in area,
a data processing means that compares the end address of a certain information unit N and the start address of the next information unit N+1 and determines that the area is a recordable area if an address difference of more than a predetermined value exists; a storage means in which address difference data indicating the detected recordable area is written;
The present invention is characterized by comprising display means for reading and displaying the address difference data written in the storage means in descending order according to a display operation input.

F. Effect In the present invention, data such as performance information is recorded in a program area of a recordable disk to which an absolute address has been given, and after the data recording operation to the program area is completed, information units in which data has been recorded in the program area are recorded. By recording the start address data and end address data of the area in the lead-in area provided on the inner or outer side of the disc, a certain End address of information unit N and next information unit N
A data processing means detects a recordable area such as an unrecorded part or an unnecessary recorded part in the program area of the recordable disc, with an area having an address difference of a predetermined value or more from the +1 start address as a recordable area. can do. By displaying the address difference data indicating the recordable area detected by the data processing means in descending order, the user can accurately recognize the size of the recordable area.

G. Example The example described below uses a magneto-optical disk having a perpendicular magnetization film having a magneto-optical effect as a recording medium as the recordable disk 1 having the recording format shown in FIG. The linear velocity of disk 1 is constant (CL V
: Con5tant LenearVelocit
Compact disc (CD)
The present invention is applicable to a disc recording and reproducing apparatus that records and reproduces performance information in the data formant shown in FIG.

Configuration of G-1 Disc Recording and Reproducing Apparatus This disc recording and reproducing apparatus, as shown in the block diagram of FIG. The optical head 12 is provided with an optical head 12 and a magnet 13, and the optical head 12 is connected to an emboss reproduction amplifier 14, an MO reproduction amplifier 15, a recording amplifier 16, and a recording amplifier 27.

The optical head 12 is composed of optical components such as a laser diode, a photodetector, a lens, and a beam splitter, and is configured to record and reproduce information by irradiating the recordable disc l with a laser beam. I'm stroking it. Further, the magnet 13 applies a magnetic field for recording or erasing information on the recordable disk 1 using the magneto-optical effect, and the direction of the magnetic pole is reversed between the recording operation mode and the erasing operation mode. It looks like this.

Of the reproduced RF signals read from the recordable disc l by the optical head 12, the embossed area 4
The reproduction signal from the emboss reproduction amplifier 14 is supplied to the decoder 16, and the absolute address data decoded by the decoder 16 is supplied to the microcomputer 17. Further, the reproduction signal reproduced from the data recording area 5 of the recordable disc 1 is transmitted to the reproduction processing circuit 1 via the MO reproduction amplifier 15.
8 and undergoes predetermined signal processing.

Then, the performance information reproduced from the program area 6 of the recordable disc 1 is supplied from the reproduction processing circuit 18 to the digital-to-analog (D/A) converter 20,
The D/A converter 20 converts it into an analog signal, and the reproduced audio signal S is output from the signal output terminal 22 via the buffer amplifier 20.
It is output as o. Also, the TO reproduced from the lead-in area 6 of the recordable disc l
The C information is supplied from the reproduction processing circuit 18 to the TOC buffer memory 19 and stored therein.

Further, in this disc recording and reproducing apparatus, an audio signal S to be recorded in the program area 6 of the recordable disc 1 is used.
i is supplied from the signal input terminal 23 via the buffer amplifier 24 to an analog-to-digital (A/D) converter 25, and is digitized by the A/D converter 25. Then, the performance information digitized by the A/D converter 25 is subjected to predetermined signal processing in a recording signal processing circuit 26, and then supplied to the optical head 12 via the recording amplifier 27, and is sent to the recordable disc. It is designed to be recorded in the program area 6 of 1.

Furthermore, the microcomputer 17 includes operation keys 28 for inputting control data, and a display 2 for displaying various data.
9 is connected, and the above recordable disk 1
A space buffer memory 30 for storing information indicating the recordable area of the program area 6 is connected. Further, the output of the A/D converter 25 is also supplied to the microcomputer 17 as a silent portion detection signal.

Here, the recordable disc 1 can record, for example, 60 minutes of performance information in its program area 6, and the first song starts playing from 00 minutes 00 seconds and ends at 05 minutes 00 seconds, and the first song starts playing from 00 minutes 00 seconds and ends at 05 minutes 00 seconds. The second song starts playing from 08:00 and starts at 1
The performance ended at 3 minutes OO seconds, and the third song started at 15 minutes 0 seconds.
The performance started from 2 seconds and ended at 20 minutes 00 seconds.
The fourth song starts playing at 28 minutes 00 seconds and ends at 36 minutes 00 seconds, and the fifth song starts playing at 36 minutes 20 seconds and ends at 41 minutes 00 seconds. It is assumed that performance information for five songs has already been recorded, and the lead-in area 7 contains each piece of performance information for the first to fifth songs as TOC information indicating the recorded contents of the program area 6. It is assumed that TOC information as shown in Table 1, which indicates the recorded areas by absolute addresses, is recorded.

: 〇 Operation of the 6G-2 disc recording and reproducing apparatus As shown in the flowchart of FIG. 2, this disc recording and reproducing apparatus first performs the above-mentioned process when the recordable disc 1 is loaded (step 101) at the start of operation. The TOC information recorded in the lead-in area 7 of the recordable disc 1 is read by the optical head 12, reproduced, and stored in the TOC buffer memory 19 (step 102).Next, the TOC information is stored in the TOC buffer memory 19. Based on the TOC information obtained, the space time indicating the recordable area of the program area 6 of the recordable disc 1 is (N-1).
The address difference between the performance start time (start address data) of the song and the performance end time (end address data) of the (N) song is calculated (step 103), and the difference (i.e. space time) is calculated as a predetermined address difference (e.g. 30 seconds) (step 104), and as a result of the determination in step 104, N=1, that is, the difference between the performance start time of the second song and the performance end time of the first song. If there is a difference of 30 seconds or more between them, it is determined that the area between the recorded portion of the first song and the recorded portion of the second song is the first recordable area, and the performance of the second song is started. The recordable time indicated by the difference data between the time (start address data) and the performance end time (end address data) of the first song is stored in the space buffer memory 30 as space information together with the space number etc. (step 105). Further, after completing the operation in step 105, or as a result of the determination in step 104, if there is no difference of 30 seconds or more between the performance start time of the second song and the performance end time of the first song, Step 1 is to determine whether or not a recordable area detection process has been performed for the entire TOCtIIt information stored in the TOC buffer memory 19.
The process returns to step 103 through step 06, calculates the difference between the performance start time of the next third song (start address data) and the performance end time of the second song (end address data), and stores the space information in the space buffer. Moving on to the operation of storing in the memory 30 (step 103, step 104, step 105), the address difference between all songs is determined in order to detect a recordable area with a recordable time of 30 seconds or more. . Then, when the judgment result in step 106 is rYEsJ, that is, the recordable area detection process is completed, the space information stored in the space buffer memory 30 is rearranged in descending order of recordable time (step 107), and the standby state is reached. becomes.

Here, when detecting the recordable area of the program area 6 of the recordable disc 1 by calculation from the T○C information shown in Table 1 above, there are actually 3 Space information as shown in Table 2 is detected by the microcomputer 17 and stored in the space buffer memory 30 so as to secure a spare time of seconds.

In this way, the microcomputer 17 stores the TOC information in the TOC buffer memory 19 and stores the space information in the space buffer memory 30 in a standby state, and receives and receives control inputs by operating the operation keys 28. , performs a space mode control operation as shown in the flowchart of FIG.

That is, the microcomputer 17 accepts the operation of the TIME key as the operation key 28 (step 201), switches the display mode of the display 29 (step 202), and then changes the set operation mode to space. Determine whether mode is selected (step (203))
L. If you are in space mode, set the space number [block] to "
1" (step 204), and read out the space information with the space number [rlJ] from the space buffer memory 30. In step 205), the display 2
A space is displayed on the display screen of 9 (step 206).

Here, on the display screen of the display device 29, when the space mode is set, the characters rSPAGEJ are displayed, and the space number [hidden] and its recordable time [minutes and seconds] are displayed as shown in FIG. It will be displayed as shown.

Then, when the microcomputer 17 accepts the operation of the FF key as the operation key 28 in this space mode (step 207), the space number [
隘] (208) and repeat step 20 above.
Returning to the space information reading operation in step 5, the space information of the space number [affected] is displayed on the display screen of the display 29, and the operation of the FR key is accepted as the operation key 28 (step 209). ) and decrement the space number [Arashi] (208) and perform step 20 above.
Returning to the space information reading operation in step 5, the space information of the space number [Ni] is displayed on the display screen of the display 29.

Further, the microcomputer 17 accepts simultaneous operation of the REC key and the PLAY key as the operation keys 28 in this space mode (step 211).
), the recording operation is started for the recordable area of the space number [难] displayed on the display screen of the display 29 (step 212), and recording continues until the operation of the L and 5 TOP keys is accepted (step 213). perform an action. and,
When the operation of the 5TOP key is accepted (step 213), the recording operation is ended (step 214), the contents of the Toc buffer memory 19, that is, the TOC information is changed (step 215), and the contents of the space buffer memory 30, that is, the TOC information is changed (step 215). The space information is changed (step 216) and the system enters a standby state.

Here, for example, if performance information with a performance time of 2 minutes and 40 seconds is recorded in a recordable area with a space number (Nu) of "2" and a recordable time of 2 minutes and 54 seconds, the process of step 215 above is performed. Accordingly, the TOC buffer memory 19
The contents of the space buffer memory 30 are changed to the new TOC information shown in Table 3, and the contents of the space buffer memory 30 are changed to the new space information shown in Table 4.

[Margin below]

:7 of TOC [Blank below] Furthermore, when the microcomputer 17 accepts the single operation of the PLAY key as the operation key 28 in this space mode (step 217), the microcomputer 17 displays the message on the display screen of the display 29. Starts playback operation for the recordable area of the space number [seed] (step 2).
19) The playback operation is performed until the operation of the L and 5TOP keys is accepted (step 220), and when the operation of the 5TOP key is accepted (step 219), the playback operation is ended (step 220) and the system enters the standby state. Become.

Through this reproducing operation, it is possible to check the recorded contents of the recordable area remaining after overlapping recording.

Furthermore, this disc recording/reproducing device has the above-mentioned operation key 2.
When the eject mode is specified by the operation in step 8, the fifth
As shown in the flowchart of the figure, TOC information stored in the TOC buffer memory 19 is transferred to the lead-in area 7 of the recordable disc 1 by the optical head 12.
is recorded (step 301) L, and then an eject operation (step 302) is performed to complete the operation.

Effects of the Invention In the present invention, unrecorded portions and unnecessary portions existing in the program area of a recordable disc are identified based on start address data and end address data recorded in the recordable disc glue-in area to which an absolute address is given. Since the recordable area such as the recording part is detected and the address difference data indicating the recordable area is displayed in descending order, the user can accurately recognize the size of the recordable area and record the necessary information. can be done easily and efficiently.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a disc recording/reproducing apparatus according to the present invention, FIG. 2 is a flowchart showing the operation of the disc recording/reproducing apparatus in the up mode, and FIG. 4 is a flowchart showing the operation of the space mode, and FIG. 4 is a schematic diagram of the display contents of the display in the space mode,
FIG. 5 is a flowchart showing the operation of the eject mode of the disc recording and reproducing apparatus, and FIG. 6 is a schematic diagram for explaining the recording format of the recordable disc used in the disc recording and reproducing apparatus. FIG. 7 is a schematic diagram showing a data format of information recorded on the recordable disc. 1... Recordable disc 4... Emboss area 6... Program area 7... Lead-in area 12... Optical head 16... Decoder 17... Microcomputer 19... TOC buffer memory 29...Indicator

Claims (1)

[Scope of Claims] Data such as performance information is recorded in the program area of the recordable disk to which an absolute address is given, and after the data recording operation in the program area is completed, the information unit in which the data in the program area has already been recorded is recorded. recording means for recording start address data and end address data of an area in a lead-in area provided on the inner or outer circumference side of the disk; and a recording means for recording start address data and end address data of each information unit area recorded in the lead-in area. Read address data,
a data processing means that compares the end address of a certain information unit N and the start address of the next information unit N+1 and determines that it is a recordable area if an address difference of more than a predetermined value exists; and the data processing means detects the area. and a display means for reading and displaying the address difference data written in the storage means in descending order according to a display operation input. Characteristic disc recording device.