JP3453774B2 - Recording device and recording method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus and a recording method for a disc-shaped recording medium capable of recording data such as music.

[0002]

2. Description of the Related Art A data rewritable disc medium on which a user can record music data and the like is known, and in a magneto-optical disc which is one of such disc media, for example, an optical head is used for reproduction. Also irradiates a high-level laser beam to overheat the recording portion to the Curie temperature or higher, and applies a magnetic field of N or S to the recording portion from the other surface of the disk by the magnetic head to perform recording. . For example, a signal obtained by subjecting audio data to a predetermined modulation processing is supplied to the magnetic head, and the magnetic head applies a magnetic field of N or S according to the modulation signal. Is recorded. Such a recording device is implemented as a recording device using a magneto-optical disc known as a mini disc as a recording medium.

The audio information supplied for recording in such a recording device is analog, for example, supplied from an analog tape player or an LP record player, or an analog output terminal in a CD player or the like. When a voice signal is present and such an analog voice signal is supplied, the recording device converts this into digital data for recording. In addition, the digital output of a CD player, the digital output of, for example, a mini disk player, and the digital output of a DAT player are directly input and recorded.

[0004]

By the way, when recording the audio signals supplied from the various sources in the recording device (mini disk recording device) as described above, for example, C
Track management is performed by automatically adding a track number (music number) assigned to each song in D software or the like to recorded songs,
In order to perform such track number management, it is detected that the music has changed in the supplied analog or digital audio signal.

Particularly, when the input signal is supplied as digital data from, for example, a CD player or the like, the sub-code data is also sent at the same time. Therefore, if the track number information in the sub-code data is taken in as it is, Track number management (number updating) can be performed easily.

However, for example, in a CD player, a user searches for a music piece to reproduce a desired track, or a so-called program reproduction is performed to reproduce music in a desired music order, and a search operation (track jump) is performed during the reproduction operation. In such a case, the subcode data of another track may be extracted or wrong data may be detected, and the subcode data may change unnecessarily. At this time, the recording device side updates the track number according to the track number information in the sub-code data, so that there is a problem that an incorrect track number is added to the music piece to be recorded.

[0007]

The present invention has been made in view of the above problems, and it is possible to always perform accurate track number management even when recording a digital input audio signal. It is an object of the present invention to provide a recording device having such a structure.

For this reason, in a recording apparatus for recording input digital data and management data for managing the digital data on a recording medium, a change is made in the track number information of the input digital data and index information. Detecting means for detecting the update point of the track number, updating means for updating the track number according to the detection result of the detecting means, and digital data sequentially recorded on the recording medium are sequentially updated by the updating means. control means for rewriting processing the control data to each managed provided with track number to be, the
The control means records the digital data on the recording medium.
When recording is started, and the updating means
The above-mentioned detection means for a predetermined period from the time when the number is updated.
Irrespective of the detection result by
It controls so as to prohibit the update of Kkunanba.

Further , the detecting means is the track tracker.
The change in the member information and the index information above
The beginning position of each track of the
The presence or absence of digital data is detected, and the data input above is detected.
Discrimination of the recording medium on which the digital data was recorded
The detecting means is provided with another means, and the detecting means is
According to the discrimination result by the stage, the digital input
Update point of the above track number from the elapsed time information of the data
Is detected, and the detecting means further detects the input signal.
According to the continuity of frame information of digital data,
It is characterized in that the update point of the check number is detected.

The present invention further includes a detection step of detecting an update point of the track number according to a change in track number information of the input digital data and index information, and the detection result of the detection step. An update step of updating the track number, and a control step of rewriting the management data so that the digital data sequentially recorded on the recording medium are respectively managed by the track numbers sequentially updated by the update step, To the recording medium
Data recording is started, and at the update step above.
After updating the track number above,
Regardless of the detection result of the detection step,
To prohibit updating of the track number above
A recording method for recording input digital data and management data for managing the digital data on a recording medium, further comprising a control update prohibiting step .

[0011]

[Function] Not only the track number information in the subcode but also the index information in the subcode, the minute,
If the track number change point is compositely judged from these judgment factors by using the progress time information of the music such as seconds and frames, and further by judging the presence / absence of audio data, it is possible to obtain accurate information about the recorded music. Track number management will be possible.

[0012]

Embodiments of the recording apparatus of the present invention will be described below with reference to FIGS. FIG. 1 shows a block diagram of a main part of a recording / reproducing apparatus using a magneto-optical disk (mini disk) as a recording medium.

Reference numeral 1 denotes a magneto-optical disk on which, for example, a plurality of music pieces (audio data) are recorded, which is driven to rotate by a spindle motor 2. An optical head 3 irradiates the magneto-optical disk 1 with a laser beam during recording / reproduction, which provides a high level laser output for heating the recording track to the Curie temperature during recording, and the magnetic Kerr effect during reproduction. It provides a relatively low level laser power for detecting data from reflected light.

Therefore, the optical head 3 is equipped with a laser diode as a laser output means, an optical system including a deflecting beam splitter, an objective lens and the like, and a detector for detecting reflected light. The objective lens 3a is 2
It is held by a shaft mechanism 4 so as to be displaceable in the disk radial direction and the direction in which it comes in and out of contact with the disk, and the entire optical head 3 is movable by a sled mechanism 5 in the disk radial direction.

Reference numeral 6 denotes a magnetic head for applying a magnetic field modulated by the supplied data to the magneto-optical disk, which is arranged at a position facing the optical head 3 with the magneto-optical disk 1 interposed therebetween.

By the reproducing operation, the information detected from the magneto-optical disk 1 by the optical head 3 is supplied to the RF amplifier 7. The RF amplifier 7 calculates the supplied information by reproducing RF signals, tracking error signals, focus error signals, and absolute position information (absolute position information recorded as pregrooves (wobbling grooves) on the magneto-optical disk 1). Address information, subcode information,
The focus monitor signal and the like are extracted. Then, the extracted reproduction RF signal is supplied to the encoder / decoder unit 8. The tracking error signal and the focus error signal are supplied to the servo circuit 9, and the address information is supplied to the address decoder 10 and demodulated. Further, the focus monitor signal is supplied to the system controller 11 configured by, for example, a microcomputer.

The servo circuit 9 generates various servo drive signals according to the supplied tracking error signal, focus error signal, track jump command, seek command, rotational speed detection information from the system controller 11, etc. The sled mechanism 5 is controlled to perform focus and tracking control, and the spindle motor 2 is controlled to a constant angular velocity (CAV) or a constant linear velocity (CLV).

The reproduced RF signal is sent to the encoder / decoder unit 8
Then, the EFM demodulation and the decoding process such as CIRC are performed, and the data is temporarily written in the buffer RAM 13 by the memory controller 12. The reading of data from the magneto-optical disk 1 by the optical head 3 and the reproduction data transfer from the optical head 3 to the buffer RAM 13 are performed at 1.41 Mbit / sec.

The data written in the buffer RAM 13 is read at a timing at which the reproduction data is transferred at 0.3 Mbit / sec, and is supplied to the encoder / decoder section 14. Then, a reproduction signal process such as a decoding process for the audio compression process is performed, an analog signal is formed by the D / A converter 15, and the analog signal is supplied from a terminal 16 to a predetermined amplification circuit section and reproduced and output. For example, it is output as L and R audio signals.

Absolute position information obtained by decoding the pre-groove information output from the address decoder 10,
Alternatively, the address information recorded as data is supplied to the system controller 11 via the encoder / decoder unit 8 and used for various control operations. In addition, record /
The lock detection signal of the PLL circuit that generates the bit clock for the reproduction operation and the monitor signal of the missing state of the frame synchronization signal of the reproduction data (L and R channels) are also supplied to the system controller 11.

When the recording operation is performed on the magneto-optical disk 1, for example, a CD player, a tape player,
Or the audio signal from another mini disc player is at terminal 1
Will be supplied to 7a or 17b. The terminal 17a is an input terminal of an analog signal, and the recording signal (analog audio signal) supplied to the terminal 17a is converted into digital data by the A / D converter 18 and then supplied to the encoder / decoder unit 14 for audio. A compression encoding process is performed.

On the other hand, a terminal 17b represents an input terminal of a digital signal, audio information reproduced by an external CD player or a mini disk player is supplied as digital data, and the digital data is recorded data as encoder / decoder section 14 Is supplied to. This digital data includes not only voice information but also control data such as subcode information.

The recording data compressed in the encoder / decoder section 14 is once written in the buffer RAM 13 by the memory controller 12, and is read at a predetermined timing and sent to the encoder / decoder section 8. Then, the encoder / decoder unit 8 performs CIRC encoding, EFM modulation, and other encoding processing, and then supplies the magnetic head driving circuit 15.

The magnetic head drive circuit 15 supplies a magnetic head drive signal to the magnetic head 6 according to the encoded recording data. That is, the N or S magnetic field is applied to the magneto-optical disk 1 by the magnetic head 6. Further, at this time, the system controller 11 supplies a control signal to the optical head 3 so as to output a laser beam of a recording level.

Here, in order to manage the recorded music, the encoder / decoder section 14 receives the digital data from the terminal 1.
When input from 7b, the control data S _C in the digital data is extracted and supplied to the system controller 11. For example, the terminal 17 is transmitted from a CD player or the like.
As well known, as digital data input to b, there are U-bit data, C-bit data, and V-bit data as control data in addition to audio information.

U-bit data includes so-called P, Q,
Subcode data known as R, S, T, U, V, W data is included, and C-bit data is category data for discriminating a recording medium, sampling frequency data, clock data, and an optical system. Data etc. are included. Further, the V bit data includes an error flag and the like.

The system controller 11 manages various recording operations by using the required data of these control data S _C , and in particular U as described later in order to update the track number of the data being recorded. Q data of bit data is used. Note that V-bit data is used to determine the source of the input data.

Although the structure of the Q data differs depending on various recording media, the Q data structure of the CD is shown in FIG.
Shows the Q data structure of the mini disk. In the case of a CD, the track number TNO of the current music piece is shown following the control bit CTL and the address bit Ad, followed by the index information INDEX. Index information INDE
X is information that further divides the music, and index information for music of a certain track number is INDEX =
It is possible to subdivide from "01" to "99". Of course, if the song is not subdivided, the end position of the song is INDEX = "01"
Is continuously attached. The index information is INDEX = "00" at the inter-track position (during pause) from the end of a certain music to the start of the next music.

Subsequently, elapsed time information (MIN, SEC, FRAME) in the music by minutes, seconds and frames is added, and further absolute time information (AMIN, ASEC, AFRAME) is added, and finally the CRC code is added. Has been added. In the case of a mini disc, a track number TNO, index information INDEX, and a CRC code are provided, but time information is not added. However, as the index information INDEX, “01” to “99” indicating that the playback is being performed as described above, “00” indicating that the playback is being paused, and “FF” indicating that the playback is stopped are included. Exists.

Although the detailed operation will be described later, the system controller 11 manages the track number of the music which is digitally input and recorded, and the system controller 11 selects the track number TNO and the index information INDEX from the Q data.
, Use the elapsed time information (MIN, SEC, FRAME) in the music.
Further, in addition to such Q data, the system controller 11 detects the presence / absence of audio data input to the encoder / decoder unit 14, and uses this for track number management.

In FIG. 1, reference numeral 19 denotes an operation input section provided with keys used for user operation, and 20 denotes a display section composed of, for example, a liquid crystal display. The operation input unit 19 is provided with a record key, a play key, a stop key, an AMS key, a search key, etc. so that the user can operate them.

Reference numeral 21 is a RAM (hereinafter referred to as TOC memory) for holding TOC information in the magneto-optical disk 1. At the time when the magneto-optical disk 1 is loaded or immediately before the recording or reproducing operation, the system controller 11 drives the spindle motor 2 and the optical head 3 to set the TOC on the innermost side of the magneto-optical disk 1, for example. Let the area data be extracted. Then, the memory controller 12 is passed through the RF amplifier 7 and the encoder / decoder unit 8.
The TOC information supplied to the TOC memory 21 is stored in the TOC memory 21, and the system controller 11 thereafter uses this TOC information to control the recording / reproducing operation for the magneto-optical disk 1.

Particularly, in such a recordable disc medium, management data (user TOC data) for discriminating a recordable area or a recorded area is recorded, and this management data is a data recording. By rewriting the contents in response to erasing or erasing, recording can always be executed from a predetermined recordable area.

The system controller 11 for managing the track number at the time of recording in the embodiment having such a configuration.
The process will be described with reference to the flowchart of FIG. In addition,
For the sake of explanation, it is assumed that a CD player or a mini disk player exists as a source for supplying digital audio data to the magneto-optical disk 1 in the recording / reproducing apparatus, and an analog audio signal is supplied from another source. To do.

When recording, first the system controller 1
1 determines whether the audio signal input for recording on the magneto-optical disk 1 is digital data or analog signal (F101). That is, it is determined which of the terminals 17a and 17b the voice data is input. In case of analog input, there is no control data such as subcode, so
In order to automatically perform the process of updating the track number during recording, a silent portion between songs is detected, so the process proceeds to step F115.

In the case of digital input, the category information is detected from the C-bit data transmitted together with the audio data, and the source recording medium is discriminated (F
102). If it is a CD, the flag F _CD is turned on (F103), and if it is a mini disk, the flag F _MD is turned on (F104). Otherwise, the flag F _EX is turned on (F105).

Then, from the time when the user starts the recording operation from the operation unit 19 (F106), the operation of assigning a track number corresponding to the music being recorded, that is, the music to be recorded is designated as the track number. Correspond to user TO
As can be managed on C, the operation of updating the track number is started when a certain music ends and a new music starts. At the start of recording, the track number "1" is added to the first song, but if the song is already recorded on the magneto-optical disc, the next number after the number of recorded songs is It is the first track number at the start of this recording. Regarding the number of recorded songs (the number of tracks), the T read in the TOC memory 21
It can be determined from the OC or the user TOC.

Here, even if recording is started, the process waits for n seconds (for example, 2 seconds) from the start of recording to prevent erroneous update immediately after updating the track number (F107). This is normally set to a time such that the track number cannot be updated. For example, if the track number is about 2 seconds, the track (song) ends 2 seconds after the track number is updated and the next track ( This is effective for preventing erroneous update of the track number due to a change in subcode during the search operation, since it does not change to a song). Of course, it may be 2 seconds or more. It should be noted that such a waiting time is suitable for recording a music piece, but in the case of recording an English conversation voice, for example,
Since it may be possible that the time of one unit of voice to which the track number is added becomes considerably short, it is necessary not to perform such standby processing or to set it to a considerably short time. For this reason, it is preferable that the standby time be variable according to the recorded data.

When the waiting time has elapsed, the flag F _CD or F
It is confirmed whether _MD is turned on (F108). In this case, the flag F _CD or F _MD is not turned on when the source is not a CD or a mini disc, and Q data necessary for the track number processing does not exist. At this time, as in the case of the analog input, the process proceeds to step F115, and the track number updating process is executed based on the silent part detection. In other words, when the period of the silent portion continues for a predetermined time, it is determined as the music interval and the track number is updated (F115 → F116).

If the source is a CD or a mini disc, the process proceeds to step F109 to determine the track number information TNO of Q data. Even if the track number information TNO changes, the track number is not immediately updated, but the index information INDEX is next determined (F11
0). When the index information INDEX = "00",
Since it is still between songs, it is not the point where the track number should be updated, and it waits until the start position of the song where INDEX = "01". INDEX = "02" to "99"
In the case of, a certain music is in the middle, and the audio data at that time is not the point where the track number information TNO should change. In other words, in this case, the change point of the track number information TNO is erroneously determined, and this erroneous determination is canceled by the index information INDEX determination.

If it is determined that the index information INDEX = "01", then the flag F _MD is determined (F111) and the flag F _MD is determined.
When is ON, that is, when the source is a mini disc, the elapsed time information of the music cannot be obtained as Q data, so the process proceeds to step F114. When the flag F _MD is off and the source is CD, the elapsed time information of the music in the Q data is determined. That is, it is determined whether the start position of the music is the minute information MIN = "0
It is determined whether or not it is "0", and then the frame information
It is determined from the FRAME whether or not the frame is in the normal reproduction state in which the frame is obtained three times consecutively (that is, whether the frame is skipped by the track jump due to the search operation or the like), and then the process proceeds to step F114.

Then, in step F114, it is further determined whether or not the actual audio data is being supplied at that time, and if there is no audio data of a predetermined level or higher, the process waits until the track number is updated, and the actual audio data is output. The time point at which the data is obtained is set as the start position of the music piece, and the flow advances to step F116 to update the track number.

Immediately after updating the track number, n seconds are waited in step F107 to prevent erroneous updating of the track number as in the case of the start of recording. Then, the same operation as described above is repeated below. By performing the above processing until the recording is stopped (F117), the recorded musical piece is properly assigned a track number and managed. That is, the recording position is managed corresponding to the track number on the user TOC.

In the present embodiment, as described above, the operation of updating the track number when recording the digital input data is performed by first detecting the change in the track number and then detecting the number of pieces of music from between the songs by the index information. Detecting that the start position has been reached, and if the CD is the source, it is confirmed by the elapsed time information that it is the beginning position of the song and that the source device is in the normal playback state. Since the track number is updated after confirming that it is the time when data is output, erroneous updating of the track number is prevented, and the track number is added accurately at the beginning position of the song that is more suitable than the interval between songs. (By adding a track number at the beginning position of the music that is actually output as audio, a quick cue search can be performed during playback. Play can be realized).

Immediately after a new track number is given, that is, immediately after the recording is started and the track number is updated, the processing waiting time is set to prevent erroneous update of the track number.

In the above embodiment, the digital input source is a CD or a mini disc, but when DAT is used as the source, for example, track number information, music progress time information, and presence / absence of audio data are used. It is conceivable that track number processing is performed. Of course, the fact that the source is DAT, etc. can also be determined from the C-bit data, so the processing routine may be branched accordingly. Needless to say, even when data is supplied from another source, the processing steps may be configured according to the format of the control information added to the data.

In the embodiment, the example in which the present invention is adopted in the recording / reproducing apparatus has been described, but it may be a recording-only apparatus. Further, the present invention can be adopted as long as it is not limited to a recording device corresponding to a magneto-optical disc, in particular a mini disc, but a recording device corresponding to various rewritable optical discs and various tape-shaped recording media such as magnetic tapes.

[0048]

As described above, according to the present invention, the track number information discriminating operation, the index information discriminating operation,
A part or all of the judgment operation of the progress time information of a reproduction unit (for example, a music piece) and the judgment operation of the presence / absence of audio data are executed, and the sound recorded based on the executed judgment operation. By providing the control means for performing the track number processing on the data, the track number is updated at the optimum position (the head position where the audio output is actually started) without any error in the voice data of the recorded music or the like. As a result, the track number can be accurately managed, and, for example, accurate track number management can be performed corresponding to the case where a program reproduction is performed in the device on the source side of the recorded data.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram of Q data of a CD and a mini disc.

FIG. 3 is a flowchart of a track number updating process according to the embodiment.

[Explanation of symbols]

1 Magneto-optical disk 3 Optical head 6 magnetic head 8,14 Encoding / decoding section 11 System controller 12 Memory controller 13 Buffer RAM 21 TOC memory

Continuation of the front page (56) Reference JP-A-4-147485 (JP, A) JP-A-4-263165 (JP, A) JP-A-4-301261 (JP, A) JP-A-6-259875 (JP , A) Actual development Sho 62-94430 (JP, U) European patent application publication 526925 (EP, A 1) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 20/10 G11B 19/00- 19/16 G11B 27/00-27/36

Claims (10)

(57) [Claims] 1. A recording apparatus for recording input digital data and management data for managing the digital data on a recording medium, wherein tracks are changed according to a change in track number information of the input digital data and index information. Detecting means for detecting the update point of the number, updating means for updating the track number according to the detection result by the detecting means, and digital data sequentially recorded on the recording medium are sequentially updated by the updating means. A control means for rewriting the management data so as to manage each by a track number is provided, and the control means stores the digital data in the recording medium.
When the recording of the
The above detection is performed for a predetermined period from the time when the rack number is updated.
Regardless of the detection result by the means,
It is necessary to control the update of the track number to be prohibited.
Characteristic recording device. 2. The recording apparatus according to claim 1, wherein the detecting means detects the start position of the next track based on the change in the track number information and the index information. 3. The recording apparatus according to claim 1, wherein the detection means detects the presence or absence of the input digital data. 4. A discriminating means for discriminating a recording medium on which the inputted digital data has been recorded is provided, and the detecting means, in accordance with a discrimination result by the discriminating means, shows the progress of the inputted digital data. The recording apparatus according to claim 1, wherein an update point of the track number is detected from time information. 5. The recording apparatus according to claim 1, wherein the detection means detects the update point of the track number according to the continuity of frame information of the input digital data. 6. A detection step of detecting a track number update point according to a change in track number information of input digital data and index information, and updating the track number according to a detection result of the detection step. to the update step, and a control step of rewriting processing the control data to each manage the digital data are sequentially recorded on the recording medium in the track number that is sequentially updated by the update step, to said recording medium Recording of the above digital data is started
And the track number in the updating step.
For a predetermined period from the time when is updated,
Irrespective of the detection result
Update prohibition control that prohibits update of the check number.
A recording method for recording input digital data and management data for managing the digital data on a recording medium, further comprising a step . 7. The recording method according to claim 6 , wherein the detecting step detects the start position of the next track based on the change in the track number information and the index information. 8. The recording method according to claim 6 , wherein the detecting step detects the presence or absence of the input digital data. 9. A step of determining the recording medium on which the input digital data has been recorded is provided, and the detection step includes the progress of the input digital data according to the determination result of the determination step. 7. The recording method according to claim 6 , wherein the update point of the track number is detected from the time information. 10. The recording method according to claim 6 , wherein the detecting step detects the update point of the track number according to the continuity of frame information of the input digital data.