JP2000322872A - Recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent recorded and edited content from disappearing and to improve the reliability of a device by executing the updating operation of management information for the management region of a recorded medium when a reset operation is made for resetting. SOLUTION: When a resetting operation has been made, data other than U-TOC data retained in a buffer memory in an MD unit 22 is initialized. It is verified whether the U-TOC data retained in the buffer memory before the resetting operation has been updated or not. When it is judged that the U-TOC data has been updated, it is verified whether the U-TOC data is appropriate or not. When the check data is entirely extracted appropriately, it is regarded that the U-TOC data is appropriate and the U-TOC data at that time point is recorded at the control area of a disk. Then, when the writing of the U-TOC data has been completed, resetting processing is made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus suitable as a so-called car stereo or the like.

[0002]

2. Description of the Related Art Audio equipment such as a CD (compact disk) player, an MD (mini disk) player, a cassette deck, a radio tuner, a CD changer, and an MD changer have become widespread as car audio systems. In such an in-vehicle electronic device, the outer housing shape is usually 1DIN size (approximately 50 mm in height and approximately 178 mm in width as a front size) or 2DI.
It has an N size (approximately 100 mm long and 178 mm wide as a front size), and can be mounted on a front console in an automobile.

[0003] In particular, MD is a medium on which music and the like can be recorded, and is used as a home device or a portable device.
Recorders (recordable MD players) have also become widespread, but for in-vehicle use, not only playback-only machines but also recordable types have been developed. For example, if an in-vehicle MD recorder is mounted, it is possible to record favorite music and programs on the MD while the user is listening to the radio while driving.

[0004]

In the case of a mini-disc system, a program area and a management area are provided on the disk, and music data and the like are recorded in the program area. In the management area, a user TOC (hereinafter referred to as a U-TOC) is used to manage data recorded in the program area and an area in which nothing is recorded (an unrecorded area where data can be recorded; hereinafter, referred to as a free area).
TOC) is recorded. Then, the recording / reproducing device corresponding to the MD executes a recording operation and a reproducing operation with reference to the U-TOC. That is, U-
The TOC manages each recorded music or the like in data units called one program (hereinafter also referred to as “track”), and describes its start address, end address, and the like. In addition, the start address, the end address, and the like of a free area in which nothing is recorded are described as areas that can be used for future data recording.

Further, by managing the area on the disk by such a U-TOC, it is possible to edit recorded data such as music only by updating the U-TOC. For example, a divide function for dividing one track into a plurality of tracks, a combine function for linking a plurality of tracks to one track, a move function for changing a given track number according to the order of tracks to be played, and an unnecessary track. Editing processing such as a delete function for deleting (also called an erase function) can be performed easily and quickly. Furthermore, a song name or the like is registered as a track name along with each track, and can be displayed at the time of reproduction, for example. By utilizing such a function, the user can edit one or a plurality of tracks once recorded on the disc, and can create and enjoy a personal original disc.

[0006] In the mini-disc system having such a management form, for example, at the time of recording, simply recording a track such as music in the program area does not complete the recording. It is necessary to update the U-TOC so that it can be recognized. That is, after recording the track data in the program area on the disk, new U-TOC data is written to the management area in accordance with the recording operation, thereby completing the recording. This is, in other words,
The track data was recorded but for some reason UT
If the OC is not updated, then the track data is determined to be absent (even if actually recorded), that is, not recorded. Such a situation is the same not only in the recording but also in the various editing processes described above. Even if an editing operation is performed, the U-TOC must be finally updated on the disc with the editing. If you do, editing will be invalid.

Normally, in a mini disc recording / reproducing apparatus, when a mini disc is loaded, the U-TOC
Is read and stored in the internal memory. At the time of reproduction, the U-TOC taken into the memory is referred to. When recording or editing is performed, the U-TOC update to be executed in response to the recording or editing is performed on the U-TOC data in the memory. When the power of the recording / reproducing apparatus is turned off or when the disc is ejected (ejected), the current U-TOC data stored in the memory is stored in the memory (U-T
When the OC is updated), the data is written to the management area of the disk, that is, the recording and editing operations are completed only at this point.

[0008] Here, as described above, U
-Consider a case where an MD recorder for which TOC updating is performed is added to an in-vehicle audio system. In an in-vehicle audio system, for example, devices such as a CD player, an MD recorder, and a power amplifier are formed as an integrated device or a separate device, and the output of these devices is supplied to speakers arranged in the vehicle to reproduce music and the like. The output has been made. In addition, they are usually 1 DIN size or 2 DIN size and mounted on the front console, but in addition to such devices, for example, a CD changer housed in a trunk is also connected and systemized. Basically, the device mounted on the front console serves as a master unit on the system, and can control and cooperate with the systemized devices. In many cases, a CD player, an MD recorder, a power amplifier, a tuner and the like are integrated in one master unit.

In such a vehicle-mounted audio system, the front panel of the master unit serves as a user interface, that is, a display unit and various operation keys are formed. The master unit executes and controls the operation of each unit in the system according to the operation of the operation key by the user. (Or, even without direct control, the corresponding device executes the operation requested by the user, for example, by transferring operation information.) In addition, the master unit is usually configured so that the user can perform a reset operation. If there is any problem in the operation of the system, the user can reset each device on the system (initialize the power-on state).

[0010] Here, after the recording or editing is performed in the portion as the MD recorder, when the U-TOC is not updated on the disk as described above, some trouble occurs in the system and the reset is required. Becomes a problem. That is, when reset, the part as the MD recorder is also initialized, and the U-TOC update data stored in the internal memory is also lost. For this reason, for the user, the content that has already been recognized as being recorded or edited on the MD becomes invalid, which is very inconvenient.

[0011]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention is directed to recording and editing contents executed by a user on a recording medium such as an MD, for example, when management information such as a U-TOC is used. It is an object of the present invention to prevent invalidation even when reset is performed before updating on a recording medium, thereby improving the reliability of the apparatus.

For this purpose, a recording area corresponding to a recording area having a program area in which one or a plurality of programs are recorded as main data and a management area in which management information for managing recording and reproduction of the main data in the program area is recorded. As a playback device, it can perform recording and playback operations of main data for a program area of a recording medium,
A recording / reproducing means for updating the management information of the management area as necessary; a data supply means for supplying the main data to be recorded on the recording medium by the recording / reproducing means; and necessary operations including at least a reset operation are executed. When the resetting operation is performed by the operation unit that is enabled and the operation unit,
When the recording / reproducing means needs to update the management information in the management area of the recording medium, the recording / reproducing means is provided with a control means for performing a reset process after executing the updating operation. In other words, when the management information such as the U-TOC is not updated on the recording medium at the time of the reset operation, the reset processing is performed after the update, so that the recorded contents and the edited contents are not lost. To

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below as a recording / reproducing device (audio master device 1) constituting an audio system for a vehicle. The description will be made in the following order. 1. 1. In-vehicle audio system example 2. Configuration of audio master device 3. Sector structure and area structure of MD 4. U-TOC of MD Processing at reset

1. Example of In-Vehicle Audio System An example of the configuration of the in-vehicle audio system of this example will be described with reference to FIG. In the case of this example, various devices are mounted in the user's automobile as schematically shown in FIG. 1, and these are systematized.

That is, in the vehicle, an audio master device 1, an antenna 2, a CD changer 3, a DSP / amplifier 4, a speaker 5, and the like are respectively arranged at required portions. Each device is connected so as to be able to cooperate. For example, it is connected to an audio line and a control line, or is connected to a bus (such as an IEEE 1394 bus).

In the case of this embodiment, the audio master device 1 is particularly referred to for explanation. The audio master device 1 is, as described later, an MD recorder / player, a CD player, a radio tuner, a user interface (display and operation). , And a device having a function as a master controller on the system.
Or, it is a 2DIN size and attached to the front console.

The CD changer 3 is a device which can store a plurality of CDs (compact discs) and selectively reproduce them. With respect to the CD changer 3, when a user performs a reproduction instruction operation on the audio master device 1, a reproduction operation is executed based on control from the audio master device 1. This CD
The changer 3 is illustrated as an audio source device other than the audio master device 1, and examples of such a device include an MD player and an MD player.
A changer, a cassette deck, a radio tuner, and the like may be mounted.

The DSP / amplifier 4 is a sound processing unit,
It performs various kinds of sound processing such as equalizing and reverb for audio signals from the audio master device 1 and the CD changer 3, and performs an amplification operation (a so-called power amplifier function) for output from a speaker. And for example, L, R
The reproduced music or the like is output into the vehicle cabin through the speaker 5 of two channels (of course, three channels, four channels or the like). Usually, the DSP / amplifier 4 is often provided in the audio master device 1 in many cases, but in this example, as an example for explanation, the audio master device 1 and the DSP / amplifier 4 are separate devices. It just uses the system.

For example, as shown in FIG. 1, the user can listen to music and broadcast as a car audio system by recording each device in the vehicle, and further, record on the MD at the MD recorder part in the audio master device 1.・ You can enjoy editing. Although not shown, a power supply line for obtaining operating power from a car battery (12 V DC power supply) is connected to each device.

2. Next, the configuration of the audio master device 1 will be described. The audio master device 1 of the present example has, for example, a 2DIN size (approximately 10
0 mm and the width is about 178 mm). FIG. 2 shows the appearance of the audio master device 1. The panel unit 10 on the front of the audio master device 1 has a function as a user interface.

The panel section 10 is provided with an insertion section 11M for inserting an MD and an insertion section 11C for inserting a CD, so that a user can insert / eject a CD or MD. Further, for example, a display unit 12 formed of a liquid crystal panel and an operation unit 15 formed of various keys and operation units such as a jog dial are provided.

The display section 12 displays a track number at the time of MD / CD reproduction, performance time information, character information such as a song name / disc name, reproduction mode information, and a broadcast station name / frequency at the time of radio reception. You. Further, the display of the volume of the output sound, the spectrum analysis data, the effect mode, and the like are also executed.

The operation unit 15 includes, as operation keys, radio selection keys, operation keys for executing operations such as reproduction / fast-forward / fast-return / stop / cueing (AMS) / eject for MD / CD, Operation keys for recording / editing operation of MD, operation keys for selecting a disc in CD changer 3, selecting a track of MD / CD, volume level of audio signal / equalizing /
There are provided operation keys for effects, etc., function keys for switching between radio reception / MD playback / CD playback and the like as operation modes, and a source selection key for MD recording. Note that all of these operation functions do not need to be formed by dedicated operation elements, respectively, as long as one operation key is used for a plurality of operation functions or a jog dial enables various operations. Good.

The audio master device 1 functions as a master controller on a system.
In addition, a reset key 13 is provided to cover a part as a user interface, so that the user can reset the system when any system error occurs. The processing when the reset key 13 is operated will be described later, but basically, at the time of the reset operation, the audio master device 1 initializes itself, and the CD changer 3 and the DSP.
/ Amplifier 4 is also initialized.

FIG. 3 shows the internal configuration of the audio master device 1. In the audio master device 1, each block as a controller 21, an MD unit 22, a CD unit 23, a tuner unit 24, and a selector 25 is provided. The display unit 12, the reset key 13, and the operation unit 15 are the parts described with reference to FIG. In addition, the audio master device 1 and the CD changer 3 transmit a control signal CC
The CNT and the audio signal CCOUT are connected so as to be able to transmit and receive. Further, the audio master device 1 and the DSP / amplifier 4 are connected so that the control signal PACNT and the audio signal AOUT can be transmitted and received.

Note that these connections may be made by a two-line system of an audio line and a control line, or may be in a bus connection form as described above. In this example, the transmission of the audio signal between the devices and the transmission of the audio signal between the units in the audio master device 1 described below are performed in the form of an analog audio signal. Is merely an example for explanation, and it is needless to say that a part or the whole thereof may be transmitted in the form of a digital audio signal.

The controller 21 controls the operation of each unit in the audio master device 1 and also controls the CD changer 3.
And a part for controlling the DSP / amplifier 4. That is, the controller 21 controls each unit of the MD unit 22, the CD unit 23, the tuner unit 24, and the selector 25 by the control signal CNT. Further, the controller 21
The control signal CCCNT is supplied to the CD changer 3 to control the CD changer 3 to execute a required reproducing operation. Further, the controller 21 includes a DSP
By supplying the control signal PACNT to the / amplifier 4, the DSP / amplifier 4 is controlled to execute required sound processing operations (volume adjustment, echo / reverb processing, equalizing processing, etc.). The operation unit 15 is an operation key or a jog dial shown in FIG. 2, and the controller 21 controls the control signals CNT and CNT to execute necessary system operations in response to a user operation from the operation unit 15.
CCCNT and PACNT will be output. During various operations, the display unit 12 supplies display data so that the display unit 12 displays the above-described display contents according to the operation contents and the like.

The MD unit 22 is a part that can execute a reproducing operation, a recording operation, and an editing operation on the MD inserted from the MD insertion unit 11M. The detailed configuration will be described later.

The CD unit 23 is a part that can execute a reproducing operation on a CD inserted from the CD insertion part 11C. The CD unit 23 includes a CD loading mechanism, a spindle mechanism for rotating the CD, an optical head mechanism for reading data, various servo mechanisms, and the like, and reads reproduction information as music data from the loaded CD. Then, the reproduction signal processing section performs EFM / CIRC decoding processing, deinterleaving processing, D / A conversion processing, and the like on the read reproduction information, and outputs a reproduction audio signal (audio signal CDOUT). Also,
During CD reproduction, so-called sub-code data is extracted. The sub-code data 23 is supplied to the controller 21 and used for displaying reproduction time information, a track number, and the like.

The tuner unit 24 is a part to which the antenna 2 is connected and receives and demodulates AM / FM radio broadcasting. The controller 21 controls ON / OFF of the reception operation in the tuner unit 24 and the reception frequency.

The selector 25 is a part for performing switching between input and output of an audio signal. In this example, the input to the selector 25 is an audio signal MDOUT reproduced by the MD unit 22, an audio signal CDOUT reproduced by the CD unit 23, and an audio signal TUOUT as broadcast audio demodulated by the tuner unit 24. , C
There is an audio signal CCOUT reproduced and supplied from the D changer 3. The selector 25 selects these audio signals and outputs them as an audio signal AOUT to the DSP / amplifier 4. The controller 21 instructs the selection operation by the selector 25 according to the user's function operation. This allows the user to
D playback audio, MD playback audio, and radio broadcast can be selectively heard.

In the case of the present embodiment, recording can be executed on the MD loaded in the MD unit 22.
For this purpose, the selector 25 supplies the audio signal CDOUT from the CD unit 23, the audio signal TUOUT from the tuner unit 24, and the audio signal CCOUT from the CD changer 3 to the MD unit 22 as an audio signal AREC to be selectively recorded. be able to. The controller 21 instructs such a selection operation by the selector 25 according to the recording source selection operation by the user. This allows the user to record CD playback audio and radio broadcasts on the MD.

In the case of this example, various edits of the MD can be performed by updating the U-TOC, which will be described later. However, when the user performs an editing operation, the controller 21 performs an editing operation on the MD unit 22. And MD unit 2
2 to execute the U-TOC update operation.

Next, the configuration of the MD unit 22 will be described with reference to FIG. The MD controller 111 includes the MD unit 22
Functions as a part for executing various operation controls in the.
Further, the control signal CNT from the controller 21 is supplied to the MD controller 111, and the MD controller 111 causes the MD 90 to execute a reproducing operation, a recording operation, and an editing operation according to an instruction from the controller 21. During recording and reproduction of the MD 90, the MD controller 11 transmits information such as a subcode to the controller 21.
To supply. The controller 21 uses such information for a display operation and a system control operation.

The MD inserted from the MD insertion unit 11M shown in FIG. 2 is loaded into a head portion for performing a recording / reproducing operation on the MD as shown in FIG. The MD 90 is used as a medium on which audio data can be recorded, and is driven to rotate by a spindle motor 102 during recording / reproduction.
The optical head 103 operates as a head during recording / reproduction by irradiating a laser beam to the MD 90 as a magneto-optical disk during recording / reproduction. That is, at the time of recording, a high-level laser output for heating the recording track to the Curie temperature is produced, and at the time of reproduction, a relatively low-level laser output for detecting data from reflected light by the magnetic Kerr effect is produced.

Therefore, the optical head 103 is equipped with a laser diode as a laser output unit, an optical system including a polarizing beam splitter and an objective lens, and a detector for detecting reflected light. Objective lens 10
3a is the disk radial direction and M
The optical head 103 is held so as to be displaceable toward and away from the D90, and the entire optical head 103 can be moved in the radial direction of the MD90 by a sled mechanism 105. Further, the magnetic head 106a is located between the optical head 103 and the MD 90.
Is disposed at a position opposite to the above. This magnetic head 10
6a shows a magnetic field modulated by supplied data as MD.
90 is performed. The magnetic head 106a can be moved in the disk radial direction by the sled mechanism 105 together with the optical head 103.

At the time of reproducing operation, the MD is
The information detected from 90 is supplied to the RF amplifier 107. The RF amplifier 107 extracts a reproduction RF signal, a tracking error signal, a focus error signal, groove information (absolute position information recorded as a wobbling pre-groove in the MD 90), and the like by performing arithmetic processing on the supplied information. Then, the extracted reproduced RF signal is supplied to the encoder / decoder unit 108. The tracking error signal and the focus error signal are
9 and the groove information is supplied to the address decoder 110.
And demodulated. Address information decoded from the groove information, and address information recorded as data and decoded by the encoder / decoder unit 108;
The subcode information and the like are supplied to an MD controller 111 constituted by a microcomputer and used for various controls.

The servo circuit 109 generates various servo drive signals based on the supplied tracking error signal, focus error signal, track jump command and access command from the MD controller 111, rotation speed detection information of the spindle motor 102, and the like. The focus and tracking control is performed by controlling the shaft mechanism 104 and the sled mechanism 105, and the spindle motor 102 is controlled at a constant linear velocity (CLV).

The reproduced RF signal is supplied to the encoder / decoder 1
At 08, the data is subjected to decoding processing such as EFM demodulation and ACIRC, and then temporarily written to the buffer memory 113 by the memory controller 112. The reading of data from the MD 90 by the optical head 103 and the optical head 1
Transfer of reproduced data in the system from 03 to the buffer memory 113 is performed at 1.41 Mbit / sec, and is performed intermittently.

The data written in the buffer memory 113 is read at the timing when the transfer of the reproduction data becomes 0.3 Mbit / sec, and supplied to the encoder / decoder unit 114. Then, reproduction signal processing such as decoding processing for audio compression processing is performed, and 16-bit quantization, 44.1 KHz
It is sampled audio data. Then, the audio signal MDOUT is converted into an analog signal by the D / A converter 115, and is output from the output terminal 116 to the selector 25 as described above.

Writing / reading of data to / from buffer memory 113 is performed by addressing the memory controller 112 under the control of a write pointer and a read pointer. , A certain amount of data is always stored in the buffer memory 113. By outputting the reproduced audio signal via the buffer memory 113 in this way, even if tracking is lost due to disturbance or the like, the output of the reproduced audio is not interrupted, and the data accumulation remains in the buffer memory 113. During this time, for example, by accessing the correct tracking position and restarting the data reading, the operation can be continued without affecting the reproduction output. That is, the vibration proof function can be significantly improved.

When a recording operation is performed on the MD 90, the recording signal (ie, the audio signal AREC) supplied to the input terminal 117 is subjected to 16-bit quantization and 44.1 KHz sampling by the A / D converter 118. After being converted into digital data, the data is supplied to the encoder / decoder unit 114 and subjected to audio compression encoding processing for compressing the data amount to about 1/5.

As described above, the audio signal transmission between each device and unit in this embodiment may be in the form of a digital audio signal, but the audio signal (MDOUT, AREC) transmitted between the MD unit 22 and the selector 25 is converted into a digital signal. In the case of an audio signal, the D / A converter 115 and the A / D converter 118 are not required.

The recording data obtained by compressing the audio signal AREC by the encoder / decoder unit 114 is temporarily written into the buffer memory 113 by the memory controller 112 and read out at a predetermined timing to be read out by the encoder / decoder unit 108. Sent to
After being subjected to encoding processing such as ACIRC encoding and EFM modulation by the encoder / decoder section 108, the encoded data is supplied to the magnetic head drive circuit 106.

The magnetic head drive circuit 106 supplies a magnetic head drive signal to the magnetic head 106a according to the encoded recording data. That is, the magnetic head 106a applies an N or S magnetic field to the MD 90. At this time, the MD controller 111 controls the optical head 103 to output a laser beam at a recording level.

When recording / reproducing operations are performed on the MD 90, management information recorded on the MD 90, that is, P-TOC (pre-mastered TOC), UT
It is necessary to read OC (user TOC). The MD controller 111 responds to the management information by the MD 90.
The address of the area to be recorded and the address of the area to be reproduced are determined. This management information is held in the buffer memory 113. For this reason, as shown in FIG. 5A, the buffer area for the recording data / reproduction data and the TOC data area holding these management information are divided and set in the buffer memory 113. Then, when the MD 90 is loaded, the MD controller 111 reads out the management information by executing a reproduction operation of the management area on the innermost peripheral side of the disk, and stores it in the buffer memory 113. M
It can be referred to at the time of recording / reproducing operation for D90.

The U-TOC is edited and rewritten in accordance with the recording or erasing of data. The MD controller 111 executes this editing process every time a recording / erasing operation is performed. −TOC information, and the U-TOC area of the MD 90 is also rewritten at a predetermined timing in accordance with the rewriting operation.

As shown in FIG. 5B, the U-TOC data is mainly stored in the TOC data area. The MD controller 111 reads and updates the U-TOC data at the time of reading and updating. As shown in the figure, check data composed of a predetermined data pattern is inserted at required positions such as a head position, a center position, and an end position. The check data is data unrelated to the U-TOC data. For example, it is assumed that whether the U-TOC data is destroyed at that time can be determined by storing the check data normally. Become.

In this embodiment, the U-TOC data is stored in the buffer memory 113. However, the U-TOC data may be stored in another memory (for example, the internal RAM of the MD controller 111), or may be stored in the memory. It may be memorized.

3. MD Sector Structure and Area Structure Here, the MD 90 sector structure and area structure will be described. In the mini disc system, 1
A data stream for each unit called a cluster is formed. The format of the cluster as a unit of this recording operation is shown in FIG. As a recording track in the mini disc system, clusters CL are continuously formed as shown in FIG. 7, and one cluster is the minimum unit for recording.
One cluster corresponds to two or three orbiting tracks, and has an actual reproduction time of 2.043 seconds of data.

One cluster CL is composed of the sector SCFC
To SCFE, a sub-data sector of one sector indicated as sector SCFF, and a main sector of 32 sectors indicated as sectors SC00 to SC1F. That is, one cluster is composed of 36 sectors. One sector is 235
This is a data unit formed of 2 bytes.

The linking sectors SCFC to SCFE are used for a buffer area as a break in the recording operation, various operation adjustments, and the like, and the sub data sector SCFF can be used for recording information set as sub data. Recording of TOC data, audio data, and the like is performed in main sectors SC00 to SC1F of 32 sectors.

The sectors are further subdivided into units called sound groups, and two sectors are divided into 11 sound groups. That is, as shown in the figure, the sound groups SG00 to SG0A are included in two consecutive sectors of an even sector such as the sector SC00 and an odd sector such as the sector SC01.
One sound group is formed of 424 bytes, and has a sound data amount corresponding to a time of 11.61 msec.
In one sound group SG, data is recorded while being divided into an L channel and an R channel. For example, the sound group SG00 includes L channel data L0 and R channel data R0.
G01 is L channel data L1 and R channel data R
It is composed of 1. Note that 212 bytes, which is a data area of the L channel or the R channel, is called a sound frame.

FIG. 8 shows the area structure of the MD 90. FIG.
(A) shows the area from the innermost peripheral side of the disk to the outermost peripheral side. In the MD 90 as a magneto-optical disk, the innermost peripheral side is a pit area in which read-only data is formed by embossed pits, and a P-TOC is recorded here. The outer periphery from the pit area is a magneto-optical area,
This is a recording / reproducing area in which a groove as a guide groove of a recording track is formed. The section from cluster 0 to cluster 49 on the innermost side of the magneto-optical area is used as a management area, and actual music and the like are recorded as one track each in the program area from cluster 50 to cluster 2251. Become. The periphery of the program area is a lead-out area.

FIG. 8 shows the inside of the management area in detail.
(B). FIG. 8B shows sectors (linking sectors are omitted) in the horizontal direction and clusters in the vertical direction. In the management area, clusters 0 and 1 are buffer areas with the pit area. The cluster 2 is a power calibration area PCA and is used for adjusting the output power of the laser beam. For clusters 3, 4, and 5, U-TOC is recorded. Although the contents of the U-TOC will be described later in detail, a data format is defined in each of the 32 main sectors (SC00 to SC1F) in one cluster, and predetermined management information is recorded. That is, the address of each track and the address of a free area recorded in the program area are recorded, and the U-TOC sector is defined so that information such as the track name and recording date and time associated with each track can be recorded. . Clusters having a sector serving as such U-TOC data are repeatedly recorded three times in clusters 3, 4, and 5. The clusters 47, 48, and 49 are buffer areas with the program area.

In the program area after the cluster 50 (= 32h in hexadecimal notation), in each of the 32 main sectors (SC00 to SC1F) in one cluster, audio data such as music is compressed in a compression format called ATRAC. Be recorded. Each recorded program and recordable area are
Managed by U-TOC.

4. MD U-TOC [U-TOC Sector 0] As described above, in order to perform the recording / reproducing operation of the program (track) with respect to the MD 90, the MD controller 111 requires the MD 90 in advance.
P-TOC, UT as management information recorded in
The OC is read out and referred to when necessary. Here, as management information for managing the recording / reproducing operation of a track (music or the like) in the MD 90, U
-The TOC sector will be described.

The P-TOC is formed in the pit area on the innermost peripheral side of the disk as described with reference to FIG. 8, and is read-only information. And the recordable area of the disc by P-TOC (recordable user area)
And management of positions such as a lead-out area and a U-TOC area. Note that there is a reproduction-only MD in which all data is recorded in a pit form. In such a case, a track (song) recorded in ROM by the P-TOC can be managed. And no U-TOC is formed. Detailed description of P-TOC is omitted.

FIG. 9 shows the format of U-TOC sector 0. Note that the U-TOC sector can be provided from sector 0 to sector 32.
That is, the main sectors SC00 to SC in one cluster described above.
This is a sector recorded corresponding to C1F. inside that,
Sectors 1 and 4 are character information areas, and sector 2 is an area for recording the recording date and time. Sector 1 and sector 4 will be described later, and description of sector 2 will be omitted. First, the U-TOC sector 0 that is necessarily required for the recording / reproducing operation of the MD 90 will be described.

The U-TOC sector 0 is a data area in which programs such as songs recorded by the user and management information on free areas in which new programs can be recorded are mainly recorded. For example, when trying to record a certain music on the MD 90, the MD controller 1
No. 11 searches for a free area on the disk from the U-TOC sector 0, and records audio data there. At the time of reproduction, the area in which the music to be reproduced is recorded is determined from U-TOC sector 0, and the reproduction operation is performed by accessing the area.

In the data area of U-TOC sector 0 in FIG. 9 (4 bytes × 588, 2352 bytes), a synchronization pattern in which all 0s or all 1s of 1-byte data are formed at the head position is recorded. Followed by the cluster address
(Cluster H) (Cluster L) and sector address (Secto
An address to be r) is recorded over 3 bytes, and 1 byte of mode information (MODE) is added. The 3-byte address here is the address of the sector itself. The header part in which the synchronization pattern and the address are recorded is not limited to the U-TOC sector 0, but also applies to the P-TOC sector and the sector in the program area. Has been recorded.

Subsequently, a maker code, a model code, and a track number (F
irst TNO), track number of last track (Last T
NO), data such as sector usage (Used sectors), disk serial number, and disk ID are recorded.

Further, various pointers (P-DFA) are used as pointers in order to identify the areas (free areas, etc.) of tracks (music, etc.) recorded by the user by making them correspond to a table section described later. , P-EMPT
An area for recording Y, P-FRA, and P-TNO1 to P-TNO255) is prepared.

As a table unit corresponding to the pointers (P-DFA to P-TNO255), 255 parts tables from (01h) to (FFh) are provided. For a part, a start address as a starting point, an end address as an end, and mode information (track mode) of the part are recorded. In addition, since the parts indicated in each part table may be successively connected to other parts, link information indicating the part table in which the start address and the end address of the connected parts are recorded can be recorded. Have been. Note that a part refers to a track portion in which temporally continuous data is physically continuously recorded in one track. And the start address,
The address indicated as the end address is an address indicating one or a plurality of parts constituting one music piece (track). These addresses are recorded in short form,
Specify clusters, sectors, and sound groups.

In the MD 90, one music (program /
Track) data is physically discontinuous, that is, even if it is recorded over a plurality of parts, it does not hinder the playback operation by playing back while accessing between parts. For the purpose of efficient use of the recordable area, recording may be performed in a plurality of parts. Therefore, link information is provided, for example, the numbers (01h) to (FF
According to h), the parts tables can be connected by specifying the parts tables to be connected. In other words, in the table section in the U-TOC sector 0, one part table represents one part. For example, for a music composed of three parts connected, three parts tables connected by link information Manages the position of the part.

Each part table from (01h) to (FFh) in the table section of the U-TOC sector 0 includes pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1) in the pointer section.
~ P-TNO255) indicates the contents of the part as follows.

The pointer P-DFA indicates a defective area on the disk, and is a single parts table or a leading parts table in a plurality of parts tables indicating a track portion (= part) serving as a defective area due to a scratch or the like. Is specified. That is, when a defective part exists, any one of (01h) to (FFh) is recorded in the pointer P-DFA, and the defective part is indicated by the start and end addresses in the corresponding parts table. If another defective part exists, another part table is designated as link information in the part table, and the defective part is also shown in the part table. If there is no other defective part, the link information is set to "00h", for example, and there is no link thereafter.

The pointer P-EMPTY is 1 in the table section.
Or, indicates the leading parts table of a plurality of unused parts tables, and when there is an unused parts table, (01h) to (FFh) as a pointer P-EMPTY.
Is recorded. If there are multiple unused part tables, the part tables are sequentially specified by the link information from the part table specified by the pointer P-EMPTY, and all the unused part tables are connected on the table part. .

The pointer P-FRA indicates a free area on the magneto-optical disk 90 where data can be written.
A leading parts table in one or a plurality of parts tables indicating a track portion (= part) to be a free area is designated. In other words, if there is a free area, any of (01h) to (FFh) is recorded in the pointer P-FRA, and the parts table corresponding to the free area is indicated by the start and end addresses. ing. When there are a plurality of such parts, that is, when there are a plurality of parts tables, the link information sequentially designates the parts table whose link information is "00h".

FIG. 10 schematically shows the management state of parts that are free areas by using a parts table. This is because when the parts (03h) (18h) (1Fh) (2Bh) (E3h) are set as free areas, this state follows the pointer P-FRA and the parts table (03h) (18h) (1Fh) (2Bh) The state represented by the link (E3h) is shown. The above-described management of the defective area and the unused parts table is the same.

The pointers P-TNO1 to P-TNO255 are
0 indicates a track of a song or the like recorded by the user. For example, the pointer P-TNO1 indicates a temporally leading part of one or a plurality of parts on which data of the first track is recorded. Specified parts table. For example, if a music piece set as the first track (first program) is recorded on the disc without dividing the track, that is, as one part, the recording area of the first track is indicated by the pointer P-TNO1. Are recorded as start and end addresses in the parts table.

For example, in the case where the music set as the second track (second program) is discretely recorded on a plurality of parts on the disc, each part is time-based to indicate the recording position of the second track. Are specified according to a typical order. That is, from the part table specified by the pointer P-TNO2, another part table is sequentially specified by the link information in accordance with the temporal order, and linked to the part table in which the link information is "00h" (see above, (Same form as FIG. 10). As described above, for example, all the parts on which the data constituting the second music are recorded are sequentially designated and recorded, so that the U-TOC sector 0 is recorded.
When reproducing the second music or performing overwrite recording in the area of the second music using the data of the above, the optical head 3 and the magnetic head 6a are accessed to extract continuous music information from discrete parts. Thus, recording using the recording area efficiently can be performed.

As described above, a rewritable disk (MD
For 90), the area management on the disk is P-TO
C, music recorded in the recordable user area, free areas, and the like are performed by U-TOC.

[U-TOC Sector 1] Next, FIG. 11 shows the format of U-TOC sector 1. This sector 1 is used as a data area for recording input character information when a track name is given to each recorded track or a disc name is given as information such as the name of the disc itself.

The U-TOC sector 1 has a pointer P-TN as a pointer section corresponding to each recorded track.
A1 to P-TNA255 are prepared, and the pointers P-TNA1 to P-TNA255
The slot part specified by TNA255 is 8 bytes per unit, and slots (01h) to (FFh) of 255 units and one slot (00h) of the same 8 bytes are prepared, which are almost the same as the U-TOC sector 0 described above. Character data is managed in a similar manner.

In the slots (01h) to (FFh), character information as a disc title or a track name is recorded in ASCII code. Then, for example, a character input by the user corresponding to the first track is recorded in the slot specified by the pointer P-TNA1. Further, by linking the slots by the link information, the character input corresponding to one track can be handled even if it is larger than 7 bytes (7 characters). Note that 8 bytes as the slot (00h) are a dedicated area for recording a disc name, and are not specified by the pointer P-TNA (x). This U-TOC sector 1
But the pointer P-EMPTY manages unused slots.

[U-TOC Sector 4] FIG.
This indicates an OC sector 4. This sector 4 is, similarly to the sector 1 described above, data for recording input character information when a user gives a song name (track name) or a disc name to a recorded track. The format is almost the same as that of the sector 1 as can be seen by comparing FIGS. However, in the sector 4, code data (two-byte code) corresponding to Chinese characters and European characters can be recorded, and the attribute of the character code is recorded at a predetermined byte position.
The management of the character information of the U-TOC sector 4 is performed by the pointers P-TNA1 to P-TNA255 and the pointer P-TNA255 similarly to the sector 1.
This is performed by slots (01h) to (FFh) of 255 units specified by TNA1 to P-TNA255.

Since the U-TOC (sector 0 to sector 4) is formed as described above, it is possible to edit the recorded track and the like by rewriting the U-TOC. That is, track splitting, linking, moving,
Editing such as erasure can be realized by updating the U-TOC sector 0. Further, character information such as a track name and a disc name can be recorded in sector 1 and sector 4.

5. Processing at Reset Subsequently, the operation at the time of reset, which is the most characteristic operation in the audio master device 1 of this example, will be described. As described above, the audio master device 1 also functions as a master controller of the audio system.
If the system operation cannot be continued due to the malfunction of the operation inside the system or the malfunction of the CD changer 3 or the DSP / amplifier 4, the user can reset the system by resetting the system. It can be returned to a normal state. For example, normally, when a malfunction to be reset occurs, the audio master device 1
Displays a request for a reset operation on the display unit, and the user operates the reset key 13 in accordance therewith. Then, the audio master device 1 initializes internal units and other devices (CD changer 3 and DSP / amplifier 4), and restarts the system.

However, if reset processing is simply performed in response to a reset operation, inconvenience may occur in the operation of the MD unit 22. As described above, the U-TOC data of the MD 90 is updated on the buffer memory 113 after recording or editing is performed, and the updated data is written to the MD (disk 90) when the power is turned off or when the disc is ejected. Will be. Therefore, if the recording / editing is performed, the U-TOC
If the reset occurs before the is updated,
The updated U- stored in the buffer memory 113
TOC data is lost. As a result, the disc 90 after resetting is in a state before recording or editing is performed (because the U-TOC has not been updated). In other words, the contents that should have been recorded or edited for the user are not displayed. It will be lost.

In this example, the controller 21 performs processing as shown in FIG. 6 at the time of the reset operation so that such inconvenience does not occur. FIG. 6 shows the processing of the controller 21 from the time when the user performs the reset operation.

When the reset operation is performed, the controller 21 firstly proceeds to step F101 to execute the MD unit 22
Of the U-TOC data other than the U-TOC data held in the buffer memory 113 (or memory). That is, the buffer memory 113 of the MD unit 22
Audio buffer data, various servo coefficients, processing coefficients, etc. in the CD, various servo coefficients, processing coefficients, etc. in the CD unit 23, tuning frequency of the tuner unit 24, selector 2
5, the selected state, various operation coefficients in the CD changer 3,
Initialize the processing coefficients and the like of the DSP / amplifier 4.

Subsequently, in step F102, the U-data stored in the buffer memory 113 before the reset operation is performed.
It is confirmed whether the TOC data has been updated (that is, whether recording or editing has been performed since the power-on or the loading of the disc 90 until the reset operation). If UT
If the OC update has not been performed, there is no problem even if the reset processing is performed as it is, and the process proceeds to step F106 to perform a required reset processing. Here, step F
In step 101, the U-TOC data in the buffer memory 113, that is, the U-TOC data that is not executed, is initialized, and when all the data to be initialized in the system have been initialized, the system restart processing is performed. Do. When the re-startup is completed, a series of processes at the time of resetting from step F107 is ended.

However, in step F102, the U-TOC
If it is determined that there has been an update of the
To the U-TO in the buffer memory 113 at this time.
Check whether the C data is correct. This is a reset operation which is performed in the first place when there is some problem, and depending on the nature of the problem, the U-TOC data itself may be incorrect or may be destroyed / erased. Because there is also
The contents will be confirmed. The U-TOC content confirmation processing is processing for confirming the check data described with reference to FIG. As long as the proper contents are maintained as the U-TOC data itself, the check data should be maintained as it is as a correct data pattern. In other words, if the correct check data does not exist at that time, the U-TOC data content can be said to be unreliable.

Therefore, for example, when check data is inserted at three places in the TOC data area in the buffer memory 113 as described above, it is confirmed whether all of the three check data can be properly detected. I do.

If all the check data have been properly extracted, it is determined that the U-TOC data has been properly maintained, and the process proceeds from step F103 to F104, where the U-TOC data at that time is recorded in the management area of the disk 90. I do. When the writing of the U-TOC data to the disk 90 is completed, the process proceeds from step F105 to F106 to perform the above-described reset processing.

In this case, since the U-TOC data at that point is written to the disk 90 before the reset processing in step F106 is performed, the recording or editing operation performed by the user up to that point is effective. In other words, even if a system reset is necessary due to some problem,
The reset operation is performed after the recording / editing contents of the MD 90 are maintained, and the trouble can be solved by restarting the system.

If at least one check data cannot be properly extracted in step F103, the U-TOC
The process proceeds from step F103 to F106 assuming that the data has been destroyed, and the reset processing is performed as it is. That is, in this case, the recording or editing operation performed by the user is invalid, but the U-TOC
Since the data is destroyed, writing the U-TOC data to the disk 90 means that the contents of the disk 90 before recording / editing are also destroyed, so that such a situation is avoided. is there. In other words, the recording / editing contents immediately before the reset become invalid, but the recording / editing contents before that (before the power is turned on or before the disc is inserted) are maintained, and damage to the disc contents due to the reset is minimized. Things.

By performing the processing of FIG. 6 described above, even if the reset is performed, the contents of the recording / editing to the MD 90 up to that time are maintained, and the user recognizes that the execution has been completed. Recorded / edited content is protected as perceived. Therefore, a good system operation can be restored by resetting, and the reliability as a device capable of recording / editing can be improved.

Although the audio master device according to the embodiment has been described above, the present invention can be applied to various devices. For example, an MD recorder as a single device,
The present invention can also be applied to a recorder corresponding to another medium (or an audio master device including the recorder). Examples of other media include a recording / reproducing device that handles other types of optical disks, magneto-optical disks, and solid-state memories as recordable or editable media. Further, a modified example can be considered as a processing example as shown in FIG.
A processing example in which the processing as 01 is performed immediately before the discard 106 may be considered.

[0091]

As described above, according to the present invention, when the reset operation is performed and the recording / reproduction means needs to update the management information in the management area of the recording medium, the control means performs the recording / reproduction. Since the reset process is performed after the update operation is performed by the means, each part is initialized without updating the management information, and the recorded contents and edited contents up to that point are lost. This has the effect that it can be prevented. In other words, even when a reset is necessary, the reset process is performed after protecting the recording / editing contents that the user has recognized as being executed, thereby improving the system operation and improving the reliability of the apparatus. realizable.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a car audio system including an audio master device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an appearance of the audio master device according to the embodiment;

FIG. 3 is a block diagram of the audio master device according to the embodiment;

FIG. 4 is an MD in the audio master device according to the embodiment;
It is a block diagram of a unit.

FIG. 5 is an MD in the audio master device according to the embodiment;
FIG. 4 is an explanatory diagram of an area structure of a buffer memory of a unit.

FIG. 6 is a flowchart of a process when the audio master device of the embodiment is reset.

FIG. 7 is an explanatory diagram of an MD sector format.

FIG. 8 is an explanatory diagram of an MD area structure.

FIG. 9 is an explanatory diagram of U-TOC sector 0 of MD.

FIG. 10 is an explanatory diagram of a link form of U-TOC sector 0 of MD.

FIG. 11 is an explanatory diagram of a U-TOC sector 1 of the MD.

FIG. 12 is an explanatory diagram of a U-TOC sector 4 of the MD.

[Explanation of symbols]

1 audio master device, 2 antennas, 3 CD
Changer, 4 DSP / amplifier, 5 speakers, 1
0 panel unit, 11M MD insertion unit, 11CCD insertion unit, 12 display unit, 13 reset key, 15 operation unit, 21 controller, 22 MD unit, 23
CD unit, 24 tuner unit, 25 selector, 103 optical head, 108 encode / decode unit, 111 MD controller, 112 memory controller, 113 buffer memory, 114 encode / decode unit

Claims (1)

[Claims] 1. A recording medium having a program area in which one or a plurality of programs are recorded as main data and a management area in which management information for managing recording and reproduction of the main data in the program area is recorded. A recording / reproducing unit which can perform a recording / reproducing operation of main data for the program area, and updates management information of the management area as necessary, and a main data which the recording / reproducing unit records on the recording medium. A data supply unit that can supply the data, an operation unit that can execute a required operation including at least a reset operation, and a reset operation performed by the operation unit. If it is necessary to update the management information for the management area, after the recording / reproducing means executes the update operation, And a control unit for performing a reset process.