JP2000011608A - Recording and reproducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operationality for deleting a track by registering an address of a recording track onto index information as a recordable area or an idle area, and allocating a predetermined address existing in a readout area to a track number of a recording track to be deleted and registering it onto the index information. SOLUTION: A time corresponding to an area to be deleted is calculated. When the calculated time is smaller than a predetermined value, physical addresses that are respectively a start address and an end address of the area to be deleted are set to be invalid, and this part slot is added as an idle part slot to P-Empty of UTOC information. When silent sound is recorded in a readout area, a start address and an end address that have been newly given to a predetermined track are registered onto a part of an idle part slot number, and the start address and the end address of the part of the rewritten part slot are respectively changed to the start address and the end address of the readout area where the silent sound data has been recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and reproducing apparatus for recording and reproducing data such as audio signals.

[Prior art]

2. Description of the Related Art A conventional technique will be described by taking a mini disc (hereinafter, referred to as MD) as a recording medium as an example. As a conventional technique, Japanese Patent Application Laid-Open No. 08-102173 (editing apparatus) discloses M
A D recording / reproducing device is disclosed. When reproducing an audio signal recorded on an MD, a signal read by an optical pickup is demodulated by a demodulation circuit, and then stored as MD format compressed data in a buffer memory (storage circuit).
Next, the compressed data is read from the buffer memory (storage circuit) and input to the expansion circuit to expand the data. The expanded data is input to a digital-to-analog converter (DAC) as audio signal data, and is converted into an analog audio signal.

In the MD format, the amount of information to be recorded and reproduced is reduced to about one-fifth. Therefore, even if the transfer rate of data read from a disk is 1.4 Mbit / sec,
For demodulation as an audio signal, it is sufficient that the data read from the buffer memory (storage circuit) is 0.3 Mbit / sec. Therefore, if data is stored in the buffer memory (storage circuit), an audio signal for a time corresponding to the stored data can be reproduced.

Therefore, when external vibration is applied to the device,
When the trace of the optical pickup is deviated from the original position, for example, in the case of reproducing a compact disc (CD) on which uncompressed data is recorded, the continuity of the audio signal data is lost and sound skipping occurs. In the case, while the compressed data is read out from the buffer memory (storage circuit) and the audio is continuously output, if the optical pickup returns to the original position on the MD and continues reading out the signal, no sound skip occurs. .

[0005] In the case of recording (recording of an audio signal), if the data is recorded on the MD while the free space of the buffer memory (storage circuit) has room for the amount of data to be recorded,
Audio is not recorded uninterrupted. In the case of recording, contrary to reproduction, control is performed so that unrecorded compressed data does not accumulate in the buffer memory (storage circuit) and does not increase, and recording on the MD is performed.

In the case of a system using an MD, one track (song) includes a plurality of small track recording data (M
The small track recording data consisting of a continuous area on D is M
A plurality of such tracks (songs) are recorded on each track. The information is M
D is recorded and registered in a predetermined area. Hereinafter, a predetermined area for recording the table of contents information is referred to as a UTOC (User's Table of Content).
ts) area.

In the UTOC area, in addition to the configuration information of each track, additional information such as the year, month and date information recorded on each track, and the name of the mini-disc and the name of the track can be recorded and registered. . By updating this UTOC, you can connect tracks, move tracks,
Track division, track deletion, and the like can be performed.

In particular, when a specified track is deleted from an MD on which a plurality of tracks are recorded, track numbers after the deleted track are shifted one by one. As a result, if the recorded contents of the MD are managed by the track number, an erroneous operation such as erroneously deleting a track different from the target track without noticing that the number has been shifted will occur. Sometimes, it was difficult to use.

When deleting unnecessary tracks,
The user had to perform operations that required complicated procedures, such as playing the track to be deleted, listening to and confirming the track, and then deleting the track.

[0010]

In the above-mentioned prior art,
The above-described erroneous operation or complicated procedure was performed.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to obtain a recording / reproducing apparatus which can perform track deletion which is hardly erroneously operated and has improved operability.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a recording / reproducing apparatus capable of recording and reproducing data such as an audio signal, comprising: an audio signal recording / reproducing means for recording or reproducing data such as an audio signal on a recording medium; Table of contents information recording and reproducing means for recording and reproducing table of contents information, which is recording information of a recording track for recording data such as signals, and changing the table of contents,
Control means for controlling recording, and operation means for designating the recording track, wherein when deleting the recording track specified by the operation means, the control means can record an address of the recording track to be deleted. A recording / reproducing apparatus which registers in the table of contents information as an area or an empty area, assigns a predetermined address in a lead-out area to a track number of a recording track to be deleted, and registers the address in the table of contents.

The present invention also relates to the recording / reproducing apparatus, wherein the predetermined address is equal to or more than one sound group per track.

Further, the present invention is the recording / reproducing apparatus according to the above-mentioned recording / reproducing apparatus, wherein silent data is recorded on the track to which the predetermined address is assigned.

According to the present invention, in the above recording / reproducing apparatus, the recording medium for recording data such as an audio signal is an optical disk.

Further, according to the present invention, in the above recording / reproducing apparatus, the recording medium for recording data such as an audio signal is a mini disk.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An MD recording / reproducing apparatus will be described as an embodiment of the recording / reproducing apparatus of the present invention. FIG. 1 is a system diagram of an MD recording / reproducing apparatus showing one embodiment of the present invention. In FIG. 1, the M loaded in the MD recording / reproducing apparatus is
D1 rotates on the turntable 2B. The servo control circuit 3 controls the slide motor 18 and the spindle motor 2A, and the read signal read from the MD 1 by the optical pickup 4 is amplified by the head amplifier 5, and the EFM
(Eight to Fourteen Modulation) / ACIRC (Adva
nced Cross Interleave Reed-Solomon Code).

Next, the compressed data that has been demodulated is stored in a storage circuit 9 which is a buffer memory for earthquake resistance by a memory controller 8, and is successively ATRAC (Adaptive Transform).
Acoustic Coding) is demodulated by the modulation / demodulation circuit 10,
A digital signal is converted into an analog signal by a DAC (digital-analog converter) 12 and output to an output terminal 13 as a reproduced signal.

A recording signal is inputted from a recording input terminal 14 to an ADC (analog-digital converter) 11,
The ADC 11 converts an analog signal into a digital signal. Next, the compressed data compressed by the ATRAC modulation / demodulation circuit 10 is transmitted through the memory controller 8 to the EF.
The signal is input to the M / ACIRC modulation / demodulation circuit 7 and the EFM / A
The data is modulated by the CIRC modulation / demodulation circuit, input to the magnetic head drive circuit 17, and recorded on the MD 1 via the magnetic head 16. These memory controller 8, EFM / A
The CIRC modulation / demodulation circuit 7 and the servo control circuit 3 are controlled by a system controller 15 such as a microcomputer.

Also, DAT (Digital Audio Tape Recor)
der) 20 and digital audio signals from the CD player 21 are transmitted through an IF (interface board) 22 to A
The signal is input to the TRAC modulation / demodulation circuit 10.

Editing operations are performed via an operation unit 23 connected to the system controller 15. Recording and reproduction time information, track information, and the like are displayed on a display device 1 such as a liquid crystal display device.
9 is displayed.

Next, the format recorded in the information area on the recording surface of the MD 1 used in this embodiment will be described. FIG. 2 is an explanatory diagram showing the configuration of the MD UTOC. The configuration of the recording surface of the MD includes a lead-in section (pre-pit section) 1D, a UTOC area 1 from the innermost peripheral position 1B of the MD.
E, a user recording area 1F for recording voices and the like, and a lead-out section 1H, reaching the outermost peripheral position 1C of the MD1. In the user recording area 1F, for example, addresses A to L as shown in the right table are provided for each of the tracks 1 to 6, and in the UTOC area 1E, a table of contents which is the address of the track (song) recorded in the user recording area 1F. Information is recorded. Further, a lead-out section 1H is provided outside the user recording area 1F, and the address indicating the start position is T.
Recorded in OC.

The details of the UTOC area will be described with reference to FIG.
FIG. 3 is a diagram showing a format of the UTOC area sector 0. In the figure, FirstTNO 31
Indicates the first track number of the MD loaded in the apparatus and to be recorded and reproduced, and LastTNO 32 indicates the last track number. Since track numbers are consecutive, MD
Is obtained by the following equation. Total number of tracks = (LastTNO)-(FirstTN)
O) +1 The first track is usually one.

In the P-FRA 36, a pointer of an MD recordable area is registered. The number registered as the pointer is the head part slot number of the part slot of the recordable area, and information of the physical address of the MD is recorded in the part of the part slot number. Similarly, P-TNO1 37, P-TNO
Different pointers are registered in 238 and P-TNO 339, respectively, and information of each physical address is recorded in the part slot number indicated by the pointer.

In the pointer of the P-Empty 40, the head part slot number of a part slot of an empty area (described later) is registered. If the pointer of P-Empty registers 0, it means that there is no free area. Here, the empty area is a recorded part slot indicated by a pointer of First TNO and Last TNO of all part slots, and P P
-A part slot excluding a part slot of a recordable area indicated by a pointer of FRA and a part slot of a defective area indicated by a pointer of P-DFA described later.

The details of P-Empty will be described with a specific example. FIG. 9 shows an empty area of the MD (P-Empt).
It is explanatory drawing of y). In FIG. 9A, P-Empty
3 is registered as a pointer of. Next, (b) of FIG. 9 describes (don't care) indicating that the physical address as the start address and the end address registered in the part slot number 3 is not registered. All the part slots from part slot number 3 to part slot number 255 are don't care. The above description indicates that the area from part slot number 3 to part slot number 255 is an area for which no physical address is defined, and this area of the part slot is called an empty area.

It has been described that the part slot number at the head of the free area of the part slot is registered as a pointer in the P-Empty 40 of FIG.
After the part slot number indicated by the mpty pointer, it means that the part slot is an unused part slot. This unused part slot is used to store a physical address of a track newly recorded on the MD or to store a new physical address for editing or the like.

In the P-DFA 41, a pointer for designating a defective area having a defect such that data cannot be recorded in the information area of the MD is registered. The pointer of the P-DFA specifies the part slot in which the information of the physical address of the defective area is recorded. In the MD, the total number of part slots is limited to 255.

Next, the operation of this embodiment will be specifically described. Let us consider a case where the 99th track is deleted from the MD already recorded from the first track to the 100th track. FIG. 4 shows the M recorded to the 100th track.
FIG. 9 is a diagram illustrating a recording state of D. FIG. 5 is a diagram showing the recording state of the MD after the 99th track has been deleted by the MD recording / reproducing apparatus of one embodiment of the present invention. FIG.
FIG. 4 is an explanatory diagram of UTOC management of an MD before deleting a track. FIG. 7 is an explanatory diagram of UTOC management after a track is deleted by the MD recording / reproducing apparatus according to one embodiment of the present invention. Hereinafter, a description will be given with reference to FIGS.

In FIG. 4, the left direction is the inner circumference of the disk, and the right direction is the outer circumference of the disk. Tracks 1 to 97 are omitted because they are omitted. As shown in FIG. 4, the 98th track, the 99th track, and the 100th track are sequentially recorded on the disc in order from the left side, and there is a next recordable area 1 outside the 100th track. FIG. 6 is a diagram for explaining a UTOC that manages track recording information corresponding to the MD recording state shown in FIG. As can be seen from FIG.
The st TNO is track 1 and the last TNO is track 100. Since the P-FRA (indicating the recordable area) is from the track 101, a total of 100 tracks are recorded on the MD. PE
The mpty of 102 indicates that the part slot numbers 102 to 255 shown in FIG. 6B are empty.

The P-FRA (indicating a recordable area) is
This is a pointer to the part slot number 101.
The actual physical address is the part slot 1 in FIG.
The start address is PT
The area starting from 101S and ending at the end address PT101E is shown. This corresponds to the recordable area 1 in FIG.

P-DFA (indicating a defective area)
Is 0, indicating that there is no unrecordable defect area in this MD. P-TNO1 is 1
And is a pointer to the part slot number. As the details of the part slot 1, the physical address of the MD is recorded. Specifically, the start address and the end address are recorded as shown in FIG. That is, in the track 1, the MD start address starts from PT1S,
The track whose end address ends with PT1E. Similarly, track 2 is a track whose MD starts at PT2S and ends at PT2E. Track 3 has an MD start address of PT3
This is a track starting from S and ending at PT3E. Similarly, the physical address of the MD is stored in the part slot corresponding to the pointer indicating the head of the part slot from track 4 to track 100.

FIG. 4 specifically shows the MD recording state of the tracks 98 to 100.
That is, in the track 98, the start address of the information indicated by the part slot number 98 in FIG.
, And ends at the end address of PT98E. More specifically, it is the portion described as the 98th track in FIG. In the 99 track, the start address of the information indicated by the part slot number 99 in FIG. 6B starts from PT99S, and the end address is PT99E.
, And specifically, the portion described as the 99th track in FIG. Similarly, track 100 is a track in which the start address of the information indicated by part slot number 100 in FIG. 6 starts from PT100S and ends in PT100E, and specifically, track 100 in FIG. It is the part described as.

The start and end addresses of the part slot numbers 102 to 255, which are a group of empty part slots indicated by the above-mentioned P-Empty information, are don't care and are ignored. is there.

MD with track 100 recorded
The operation of deleting the 99th track from the first will be described with reference to a flowchart.

FIG. 8 is a flowchart showing a track deleting operation in the MD recording / reproducing apparatus according to one embodiment of the present invention. FIG. 8 shows a procedure of a process of determining a track number to be deleted, deleting a track after performing an operation of deleting with an operation key, and assigning a track number. First, the part slot number of the track to be deleted is stored in the storage unit by inputting the number of the track to be deleted in step S1 using the operation keys. In the illustration of the UTOC management before track division shown in FIG.
Since the part slot number of nine tracks is 99, the number 99 is stored here. This is an operation to be used in processing described later.

In step S2, the real time for reproducing the audio is calculated from the physical address indicated by the part slot number obtained in step S1. Specifically, it is possible to convert the actual time of audio reproduction from the size of the address section obtained by subtracting the start address from the end address. By obtaining the converted time, the actual time of the audio reproduction of the 99th track to be deleted is obtained.

According to the MD standard, if the area to be deleted has a predetermined size of 6 clusters (12.24 milliseconds) or more, it can be reused as the next recordable area. If the size is smaller than the predetermined size, it is not possible to set a recordable area.

Therefore, the time corresponding to the area to be deleted is calculated in step S2, and a predetermined size is compared with the size in step S3. If the size is larger than the predetermined size, the process proceeds to step S4 to enable recording. UTOC as area
Add to information. If the time corresponding to the area to be deleted is smaller than the predetermined size, the process proceeds to step S5.

In step S5, since the area to be deleted cannot be registered as a recordable area, the physical address which is the start address and end address of the area to be deleted is invalidated, and this part slot is set to a vacant part. P-Empty of UTOC information as a slot
Add to

The 99th track from PT99S to PT99
If the area of E is larger than the predetermined value,
The areas from PT99S to PT99E are registered in the UTOC information as recordable areas. The recording state at this time is shown in FIG. 5 showing the MD recording state after the 99th track has been deleted and FIG. 7 showing the UTOC management after the 99th track has been deleted. In the state after the track deletion, the 99th track before the track deletion shown in FIG.
This indicates that the area has changed to the recordable area 2 indicated by. FIG. 7 shows that the physical address of the 99th track before the track deletion remains as a recordable area.

In step S6, it is checked whether or not audio data is recorded as silent data at the lead-out position of the disk. This is because when the physical address of the lead-out area is assigned as new address information to the start address and the end address of the part slot number indicated by the pointer of the PT-TNO 99 in FIG. This is because it is necessary to confirm whether or not all data on the recording track that cannot be recorded in normal recording is silent data, and to perform processing for recording silent data if no silent data is recorded.

The reason that silence is recorded at the lead-out position of the disc and that the physical address is used as a recordable area is that the normal recording does not use the lead-out area as a recording area. This is to take advantage of the advantage that the lead-out area can always be used as a recordable area.

If it is determined in step S6 that silence has been recorded in the lead-out area, the process proceeds to step S8. If no silence is recorded in the lead-out area, the process proceeds to step S7, and silence is recorded at the lead-out position. The recording time is about 1 second even considering the maximum track number 255 of the MD system.

As a new physical address of the 99th track, a physical address corresponding to one sound group per track with a minimum reproduction time is set. One sound group is 11.6 milliseconds when the compressed data is demodulated and converted into an actual reproduction time. According to the MD standard, one sound group is a real time at which the reproduction time of a track is minimized. Therefore, to prepare 255 tracks, a 255 sound group is formed, and to record this, 2 clusters are required. One cluster is a data block of the smallest unit of data to be recorded on the disc, and is composed of 176 sound groups. Therefore, two clusters of silence data to be recorded in the lead-out area are required. Approximately 500 milliseconds are required to record one cluster, so it takes approximately one second to record two clusters.

If no silence is recorded in the lead-out, it takes extra time to record silence in the area of the lead-out, but it includes a search time for the optical pickup to move to the lead-out position. Is less than 3 seconds, which is not a problem. Further, the above operation need only be performed once for one MD, and there is no practical problem.

The effect of facilitating the process of recording or reproducing silence data in the lead-out area by storing information on whether or not silence is recorded in the lead-out area on the optical disc itself. Can be.

For example, there is a method of recording information as to whether or not silence data has been recorded in a lead-out area at the position of the number 42 of the UTOC recording section shown in FIG. If no silence data is recorded in the lead-out area, 00H (hexadecimal) is recorded at the position of number 42 of sector 0, and if silence data is recorded, 01H (hexadecimal) is recorded at the position of number 42 of sector 0. Hexadecimal). Since the MD recording / reproducing apparatus always reads the UTOC information when the MD is inserted, it is easy to obtain information as to whether or not silence data is recorded in the lead-out.

Next, in step S8, a start address and an end address newly assigned to the 99th track are registered in a part having a vacant part slot number.

For example, assuming that the start address newly assigned to the 99th track is MUTEP99S and the end address is MUTE99E, the part slot shown in FIG. The above address is registered in the number 102 as information of a new part.

In step S9, the pointer 99 of the P-TNO 99, which is the part slot of the deleted track, is rewritten to the part slot number 102 created in step S8. That is, the start address and end address of the rewritten part slot P-TNO99 are changed to the start address and end address of the area in which silence data is recorded in the lead-out.

Track 99 was an area having a physical address of PT99S to PT99E before the track was deleted.
Has been newly updated as an area having a physical address of MUTEPT99E. As mentioned above, MUTE
In an area between PT99S and MUTEPT99E, data corresponding to one sound group is recorded, and 11.6 milliseconds is the actual time of sound reproduction.

According to FIG. 5 showing the recording state of the recording track of the MD after the deletion of the 99th track, the 99th track is located at the position of the MD lead-out area. Also,
According to FIG. 7 showing the recording state of the UTOC, the pointer of the part slot P-TNO99 has been updated from 99 to 102. Also, the MD address (start address-end address) of the part slot number corresponding to the pointer 99 has been updated from (PT00S-PT99E) to (MUTEP99S-MUTEP99E).

By the operation described above, the 99th track is the track (11.6) in which the real time of reproduction becomes the minimum.
Milliseconds), and the numbers of the tracks other than the 99th track do not change as in the related art. Therefore, due to operational mistakes in the recording and playback device,
No sound and 11.6 when playing track 99
There is no problem because it is very short in milliseconds.

Although not shown, the track deletion means for deleting the track number 99 itself as in the prior art is replaced with the physical address of the track to be deleted as described in this embodiment. It is easy to provide a recording / reproducing apparatus in which the selected track deleting means can be selected. In addition, if the operation unit 23 and the display device 19 shown in FIG. 1 can be used to confirm the operation of selecting the two track deleting means and the selected state, the operability of the recording / reproducing apparatus of this embodiment can be improved. Is better.

In the present embodiment, the description has been given by taking the MD as an example.
Device or DVD-RAM (Digital Versatile Disc-R
The present invention can also be used in a recording / reproducing device that records and reproduces on other recording media such as an andom access memory).

[0056]

According to the present invention, when a track is deleted, the track numbers other than the track to be deleted do not change, so that it is not necessary to confirm the contents of the music of the track to be deleted next, and the track can be easily deleted. Since deletion is possible, it is possible to obtain a recording / reproducing apparatus that is more efficient and has improved operability as compared with the related art.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of an MD UTOC.

FIG. 3 is an explanatory diagram of a format of a UTOC sector 0 of an MD.

FIG. 4 is a diagram showing a recording state of an MD recorded up to a 100th track.

FIG. 5 is a diagram illustrating a recording state of an MD after a 99th track has been deleted by the MD recording apparatus of the present embodiment.

FIG. 6 shows the UTO of the MD before deleting the 99th track.
It is explanatory drawing of C management.

FIG. 7 is an explanatory diagram of the UTOC management of the MD after the 99th track has been deleted by the MD recording device of the present embodiment.

FIG. 8 is a flowchart illustrating an operation of deleting a track of the MD recording device of the present embodiment.

FIG. 9 is an explanatory diagram of an empty area (P-Empty) of an MD.

[Explanation of symbols]

 Reference Signs List 1 MD (magneto-optical disk) 1A cartridge 2 player 2A spindle motor 2B turntable 3 servo control circuit 4 optical pickup 5 head amplifier 6 address recorder 7 EFM / CIRC modulation / demodulation circuit 8 seismic memory controller 9 storage circuit (buffer memory) Reference Signs List 10 ATRAC modulation / demodulation circuit 11 ADC 12 DAC 13 reproduction circuit 14 recording input signal 15 system controller 16 recording head 17 head drive circuit 18 slide motor 19 display device 20 DAT 21 CD player 22 IF 23 operation unit

Claims (5)

[Claims] A recording / reproducing apparatus capable of recording and reproducing data such as an audio signal, an audio signal recording / reproducing means for recording or reproducing data such as an audio signal on a recording medium, and a recording device for recording data such as an audio signal. A table of contents information recording / reproducing means for recording and reproducing table of contents information which is recording information of a track, a control means for changing the table of contents information and controlling to record, and an operation means for designating the recording track, When deleting the recording track designated by the operating means, the control means registers the address of the recording track to be deleted in the table of contents as a recordable area or a free area, and sets a lead-out area to the track number of the recording track to be deleted. A recording / reproducing apparatus for allocating a predetermined address to the table of contents information. 2. The recording / reproducing apparatus according to claim 1, wherein the predetermined address is equal to or more than one sound group per track. 3. The recording / reproducing apparatus according to claim 1, wherein silent data is recorded on the track to which the predetermined address is assigned. 4. The recording / reproducing apparatus according to claim 1, wherein the recording medium for recording data such as an audio signal is an optical disk. 5. The recording / reproducing apparatus according to claim 1, wherein a recording medium for recording data such as an audio signal is a mini-disc.