JP2002222586A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the usability for a user relating to DRAW recording media, various kinds (capacities) of which exist. SOLUTION: The kind of the loaded DRAW recording medium is discriminated and the recordable time for the DRAW recording medium is calculated by using at the result of the discrimination and is displayed. When the compression processing of the data input as one of the encoding processing of the recording data is carried out, the recordable time of the case the data subjected to compression processing is recorded is calculated and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, a CD-R
The present invention relates to a recording apparatus for a write-once (write-once) recording medium such as (Compact Disc Recordable).

[0002]

2. Description of the Related Art For example, CD-DA (Compact Disc-Digital Audio), C
D-ROM, CD-R (CD-RECORDABLE), CD-RW
(CD-REWRITABLE), CD-TEXT, so-called CD
Various discs belonging to the family have been developed and spread. CD-DA and CD-ROM are read-only media. On the other hand, a CD-R is a write-once medium using an organic dye for a recording layer, and a CD-RW
Is a data rewritable medium using a phase change technology.

[0003] The CD-R, which is a write-once disc, has a feature that data cannot be rewritten. Therefore, the CD-R is suitable for storing important data and recording data that is not allowed to be altered, and is widely used.

[0004]

There are various types of CD-Rs as write-once discs. For example, there are a disc having a diameter of 12 cm and a disc having a diameter of 8 cm, and of course, the phase recording capacities are different. In recent years, double-density CD-Rs have also been developed, and some have a recording capacity approximately twice that of a normal CD-R. Also in this case, there are a 12 cm disk and an 8 cm disk, and of course the recording capacity is different. For convenience of explanation, a normal-density CD-R is called a single-density disk, and a double-density CD-R is called a double-density disk. And the above four types are "1
2cm single density disc "," 8cm single density disc ",
They are called "12 cm double density disc" and "8 cm double density disc". In the following description, these are collectively referred to as “CD-R”.

As described above, there are various types of only write-once discs generally called CD-Rs.
Users can use them arbitrarily, but this can also confuse users. For example, when the user tries to use these media for data recording such as audio and video, the recording time is more worrisome than the above type, but especially when long recording is necessary, It is difficult for the general user to properly use them properly.

[0006]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to enable a user to easily recognize the recordable time and to properly use the recordable recording medium when there are a plurality of types of write-once recording media. I do.

Therefore, the recording apparatus for recording information on a write-once recording medium according to the present invention performs a predetermined encoding process on the input data and can record on the loaded write-once recording medium. Processing means, determining means for determining the type of the loaded write-once recording medium, display means,
And control means for calculating a recordable time for the loaded write-once recording medium using at least the discrimination result of the discrimination means, and displaying the calculated time on the display means. Further, the recording processing means performs compression processing of data input as one of the encoding processing, and the control means,
A recordable time for recording the compressed data is calculated and displayed on the display means.

In other words, according to the present invention, audio and video are recorded on a CD-R
And so on, so that the user can know the recordable time without being conscious of the type (difference in capacity) of the recording medium. As a result, the user can appropriately use the recording medium according to the recording time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk drive corresponding to a CD-R will be described below as an embodiment of the present invention. The description will be made in the following order. 1. 1. Configuration of disk drive device 2. Disk structure and ATIP 3. Subcode and TOC Remaining recordable time display processing

[0010] 1. Configuration of Disk Drive Device The CD-R is a write-once (write-once) medium using an organic dye for a recording layer.
It is assumed that the types are a 12 cm single density disc, an 8 cm single density disc, a 12 cm double density disc, and an 8 cm double density disc. Of course, besides this, C
In some cases, there are discs included in the category of the DR, but these four types are used for description. In FIG.
The disk 90 is a disk as a CD-R. It should be noted that a CD-DA (CD-Digital Audio), a CD-ROM, or the like can be reproduced as the disc 90 here.

The disk 90 is loaded on the turntable 7 and is driven by the spindle motor 1 at a constant linear velocity (CLV) or a constant angular velocity (CA) during a recording / reproducing operation.
V). Then, pit data (pits due to organic dye change (reflectance change)) on the disk 90 is read by the optical pickup 1. In the case of a CD-DA or a CD-ROM, the pits are embossed pits.

In the pickup 1, a laser diode 4 as a laser light source, a photodetector 5 for detecting reflected light, an objective lens 2 as an output end of the laser light,
An optical system (not shown) for irradiating the laser beam to the disk recording surface via the objective lens 2 and guiding the reflected light to the photodetector 5 is formed. A monitor detector 22 that receives a part of the output light from the laser diode 4
Is also provided.

The objective lens 2 is held by a biaxial mechanism 3 so as to be movable in a tracking direction and a focusing direction. The entire pickup 1 can be moved in the disk radial direction by a thread mechanism 8. The laser diode 4 in the pickup 1 is driven to emit laser light by a drive signal (drive current) from a laser driver 18.

The reflected light information from the disk 90 is detected by the photodetector 5, converted into an electric signal corresponding to the amount of received light, and supplied to the RF amplifier 9. The RF amplifier 9 includes a current-voltage conversion circuit, a matrix operation / amplification circuit, and the like corresponding to output currents from a plurality of light receiving elements as the photodetector 5, and generates necessary signals by matrix operation processing. For example, it generates an RF signal as reproduction data, a focus error signal FE for servo control, a tracking error signal TE, and the like. The reproduced RF signal output from the RF amplifier 9 is supplied to a binarization circuit 11,
Focus error signal FE, tracking error signal T
E is supplied to the servo processor 14.

A groove (groove) serving as a guide for a recording track is previously formed on the disk 90 as a CD-R, and the groove is FM-modulated with time information indicating an absolute address on the disk. It is wobbled (meandering) by a signal. Therefore, at the time of the recording operation, tracking servo can be applied from the information on the groove, and an absolute address (ATIP) can be obtained from the wobble information on the groove. The RF amplifier 9 extracts wobble information WOB by a matrix operation process, and supplies this to the address decoder 23. In the address decoder 23, the supplied wobble information WOB
Is demodulated to obtain absolute address information, which is supplied to the system controller 10. PLL information
By injecting the information into the circuit, the rotational speed information of the spindle motor 6 is obtained, and is compared with the reference speed information to generate and output a spindle error signal SPE.

The reproduced RF signal obtained by the RF amplifier 9 is 2
The signal is binarized by the value conversion circuit 11 to be a so-called EFM signal (8-14 modulated signal), which is supplied to the encoding / decoding unit 12. The encoding / decoding unit 12 includes a functional part as a decoder during reproduction and a functional part as an encoder during recording. During reproduction, processing such as EFM demodulation, CIRC error correction, and deinterleaving are performed as decoding processing to obtain reproduced data. The encoding / decoding unit 12 also performs a subcode extraction process on the data read from the disk 90, and supplies a TOC, address information, and the like as the subcode (Q data) to the system controller 10. Further, the encoding / decoding unit 12 generates a reproduction clock synchronized with the EFM signal by the PLL processing, and executes the decoding processing based on the reproduction clock.
By obtaining rotation speed information of the spindle motor 6 from the reproduced clock and comparing it with reference speed information, a spindle error signal SPE can be generated and output.

At the time of reproduction, the encoding / decoding unit 12
Transfers the data decoded as described above to the ATRAC encoder / decoder 13. In this example, it is assumed that input data, for example, audio data can be compressed and recorded by the ATRAC3 method during a recording operation described later. Therefore, when the compressed and recorded data is reproduced, the data decoded by the encoding / decoding unit 12 becomes ATRAC3 compressed data. In that case, the decoded data is subjected to a decoding process (decompression process) for further canceling the compression process in the ATRAC encoder / decoder 13. Thus, for example, when audio data is reproduced, for example, 44.1
Linear PC for KHz sampling, 16-bit quantization, etc.
M audio data is obtained. Of course, if the data to be reproduced is not the data that has been compressed and recorded, it will be, for example, linear PCM audio data after being decoded by the encoding / decoding unit 12.
The decoding process of the TRAC encoder / decoder 13 is passed.

Decoded data, for example, linear PC
The M audio data is converted into an analog audio signal by the D / A converter 23 and output. Although not shown, in the case of audio reproduction, for example, a line output, a headphone output,
Alternatively, speaker output or the like is performed. It is to be noted that, of course, at the stage of linear PCM audio data or ATRAC3 compressed data, it may be outputted as digital out to another device.

On the other hand, at the time of recording, an input analog audio signal, for example, an audio signal obtained by a microphone or an audio signal supplied from another device as a line input or the like is converted into a linear P / A signal by the A / D converter 22.
Converted to digital audio data of CM and ATRAC
It is supplied to the encoder / decoder 13. Alternatively, though not shown, when digital data such as linear PCM is input from another device, the data is ATRAC
It is supplied to the encoder / decoder 13.

The ATRAC encoder / decoder 13 performs ATRAC3 compression processing as needed under the control of the system controller 10 and transfers the compressed data to the encoding / decoding unit 12. In some cases, the data is supplied to the encoding / decoding unit 12 as linear PCM digital audio data without performing compression processing.

The encoding / decoding unit 12 executes CIRC encoding and interleaving, sub-code addition, EFM modulation, and the like as encoding processing of the supplied recording data.

The EFM signal obtained by the encoding process in the encoding / decoding unit 12 is sent to the laser driver 18 as a laser drive pulse (write data WDATA) after a waveform adjustment process is performed in the write strategy 21. In the write strategy 21, recording compensation, that is, fine adjustment of the optimum recording power with respect to the characteristics of the recording layer, the spot shape of the laser beam, the recording linear velocity, and the like is performed.

In the laser driver 18, the write data WD
A laser drive pulse supplied as ATA is supplied to the laser diode 4 to perform laser emission driving. As a result, pits (dye change pits) corresponding to the EFM signal are formed on the disk 90.

APC circuit (Auto Power Control) 19
Is a circuit unit for controlling the output of the laser so as to be constant irrespective of the temperature while monitoring the laser output power by the output of the monitoring detector 22. The target value of the laser output is given from the system controller 10, and the laser driver 18 is controlled so that the laser output level becomes the target value.

When erasing data recorded on the disk 90 (CD-RW), the encoding / decoding section 12 generates a signal of a predetermined erasure pattern under the control of the system controller 10. Then, the data is supplied to the laser driver 18 through the processing of the write strategy 21, and the data of the erasure pattern is overwritten and recorded on the erasure target portion of the disk 90. Alternatively, based on the control of the system controller 10, the APC circuit 1
9 erases the data on the disk 90 by causing the laser driver 18 to execute the laser emission of the erasing power (high level).

From the focus error signal FE and tracking error signal TE from the RF amplifier 9 and the spindle error signal SPE from the encode / decode section 12 or the address decoder 20, the servo processor 14 determines the focus, tracking, thread and spindle. Generate various servo drive signals and execute servo operation. That is, the two-axis driver 1 generates the focus drive signal FD and the tracking drive signal TD according to the focus error signal FE and the tracking error signal TE.
6 The two-axis driver 16 drives the focus coil and the tracking coil of the two-axis mechanism 3 in the pickup 1. As a result, a tracking servo loop and a focus servo loop are formed by the pickup 1, the RF amplifier 9, the servo processor 14, the two-axis driver 16, and the two-axis mechanism 3.

In response to a track jump command from the system controller 10, the tracking servo loop is turned off and a jump drive signal is output to the biaxial driver 16 to execute a track jump operation.

The servo processor 14 further sends a spindle error signal S to the spindle motor driver 17.
A spindle drive signal generated according to the PE is supplied. The spindle motor driver 17 applies, for example, a three-phase drive signal to the spindle motor 6 in response to the spindle drive signal, and controls the CLV rotation of the spindle motor 6 or CA.
Execute V rotation. In addition, the servo processor 14 generates a spindle drive signal in response to a spindle kick / brake control signal from the system controller 10, and causes the spindle motor driver 17 to execute operations such as starting, stopping, accelerating, and decelerating the spindle motor 6.

The servo processor 14 generates a thread drive signal based on, for example, a thread error signal obtained as a low-frequency component of the tracking error signal TE, an access execution control from the system controller 10, and supplies the thread drive signal to the thread driver 15. I do. The thread driver 15 drives the thread mechanism 8 according to a thread drive signal. Although not shown, the thread mechanism 8 includes
A mechanism including a main shaft for holding the pickup 1, a thread motor, a transmission gear, and the like is provided.
, The required sliding movement of the pickup 1 is performed.

The various operations of the servo system and the recording / reproducing system as described above are controlled by a system controller 10 formed by a microcomputer. The system controller 10 executes various control processes based on a program stored in the internal ROM so that an operation corresponding to a user operation from the operation unit 24 is executed in the disk drive device. The operation unit 24 is provided with various controls for the user to instruct recording and reproduction operations and the like, and their operation information is supplied to the system controller 10. For example, when the user performs a playback operation on the operation unit 24, the system controller 10
For a predetermined address. That is, a command is issued to the servo processor 14 to execute the access operation of the pickup 1 targeting the address specified by the seek command. afterwards,
The control for executing the reproduction of the data of the designated portion is performed. When the user performs a recording operation using the operation unit 24, the system controller 10 first moves the pickup 1 to an address to be written. Then, it causes the ATRAC encoder / decoder 13 and the encoding / decoding unit 12 to execute necessary encoding processing on the input data. And write strategy 21,
The recording is executed by the operation of the laser driver 18.

The display unit 25 is formed of, for example, a liquid crystal panel or the like, and is provided for displaying various information to a user. The system controller 10 generates necessary display data and supplies the display data to the display unit 25 to execute display.

2. Disc Structure and ATIP A CD disc, commonly referred to as a compact disc, has a single spiral recording track that starts at the center (inner circumference) of the disc and ends at the end (outer circumference) of the disc. In a disk on which data can be recorded on the user side, such as a CD-R / CD-RW, only grooves (guide grooves) for laser light guide are formed on a substrate as recording tracks before recording. By applying a laser beam modulated with high power to the light, a change in reflectivity or a change in phase of the recording film occurs, and data is recorded according to this principle. CD-DA, CD-R
In the case of a read-only disc such as an OM, there is no physical groove as a recording track.

In the CD-R, a recording film which can be recorded only once is formed. The recording film is an organic dye, and is a perforated recording using a high power laser. In the case of a CD-ROM, the lead-in area on the inner circumference of the disc has a radius of 46 mm to 50 m.
The pits are arranged over the range of m, and there are no pits on the inner circumference. In a CD-R, as shown in FIG. 2, a PMA (Program Memory Area) is located on the inner peripheral side of the lead-in area.
And a PCA (Power Calibration Area).

A lead-in area and a program area used for recording actual data following the lead-in area are a CD.
CD-D recorded by a drive corresponding to -R
It is used for reproducing recorded contents in the same manner as A. In the PMA, the mode of a recording signal, and time information of start and end are temporarily recorded every time a track is recorded. After all the planned tracks are recorded, a TOC (Table of contents) is formed in the lead-in area based on this information. PC
A is an area for trial writing in order to obtain the optimum value of the laser power at the time of recording.

In a CD-R, a groove (guide groove) forming a data track is formed to be wobbled (meandering) for controlling a recording position and a spindle rotation.
The wobble is formed based on a signal modulated by information such as an absolute address, and thus includes information such as an absolute address. That is, wobble information such as an absolute address can be read from the groove.
Absolute time (address) information represented by such a wobbled groove is stored in an ATIP (Absolute Tim).
e In Pregroove). Fig. 3 shows the wobbling groove
As shown in the figure, the wobble is slightly sinusoidal, the center frequency is 22.05 kHz, and the amount of wobble is about ± 0.03 μm.

In this example, not only the absolute time information but also various information is encoded in the wobbling by the FM modulation. The wobble information expressed by the wobbling groove will be described below.

As for the wobble information detected from the groove of the CD-R by the push-pull channel, when the disc is rotated at the standard speed, the center frequency becomes 22.05k.
When the spindle motor rotation is controlled to become
The disk is rotated at a linear velocity (for example, 1.2 m / s to 1.4 m / s in the case of a standard density) specified by the CD method. CD-D
A. In a CD-ROM, absolute time information encoded in a subcode Q may be used, but in a CD-R disc (blank disc) before recording, this information cannot be obtained, so that it is included in wobble information. Rely on absolute time information.

One sector (ATI) as wobble information
The P sector) coincides with one data sector (2352 bytes) of the main channel after recording, and writing is performed while synchronizing the ATIP sector and the data sector.

The ATIP information is not directly encoded into wobble information, but is once subjected to bi-phase (Bi-Phase) modulation and then to FM modulation as shown in FIG. This is because the wobble signal is also used for rotation control. In other words, 1 every predetermined period by bi-phase modulation
And 0 are exchanged, and the average number of 1 and 0 is set to 1: 1 so that the average frequency of the wobble signal at the time of FM modulation is set to 22.05 kHz. Incidentally, as wobble information, in addition to time information, recording laser power setting information and the like are also encoded as special information and the like.

FIG. 7 shows the structure of one frame (ATIP frame) as wobble information. The ATIP frame is formed of 42 bits, and as shown in FIG. 7A, a sync (synchronization) pattern of 4 bits from the beginning and a discriminator (identifier) of 3 bits are provided.
The bits are the contents recorded as actual wobble information. For example, it is a physical frame address or the like. Then, a 14-bit CRC is added to the end of the frame. In addition,
As shown in FIG. 7B, 4
In some frames, bits are used and wobble information is 20 bits.

As shown in FIG. 5 or 6, the synchronization pattern added to the head of the frame is "11101000" when the preceding bit is "0" and "1" when the preceding bit is "1".
In this case, "00010111" is used.

The 3-bit or 4-bit discriminator is an identifier indicating the content of the subsequent 21-bit or 20-bit wobble information, and is variously defined as shown in FIG. Note that 2 of bits M23 to M0 in FIG.
The 4 bits correspond to 24 bits at bit positions 5 to 28 in FIG. Bits M23, M2
2, M21 (or bits M23, M22, M21, M
20) is the discriminator, and this value is "00".
0 ”, the wobble information of the frame (M20 to
The contents of M0) indicate the addresses of the program area and the lead-out area. When the discriminator is "100", the contents of the wobble information (M20 to M0) of the frame indicate the address of the lead-in area. These correspond to the above-mentioned absolute address as ATIP. The time axis information as ATIP is recorded in a simple increase from the beginning of the program area toward the outer periphery of the disk, and is used for address control during recording.

When the discriminator is "101", it indicates that the wobble information (M20 to M0) of the frame is special information 1. When the discriminator is "110", the wobble information of the frame is "110". When the information (M20 to M0) is the special information 2 and the discriminator is "111", the wobble information (M20 to M0) of the frame is the special information 3
Is shown. When 4 bits are used as the discriminator and "0010" is set, it indicates that the wobble information (M19 to M0) of the frame is the special information 4.

When the discriminator is "010", it indicates that the wobble information (M20 to M0) of the frame is additional information 1.
When the discriminator is “011”, it indicates that the wobble information (M20 to M0) of the frame is additional information 2. Also, 4 bits are used as a discriminator, and "0011"
, The wobble information (M19
To M0) are supplement information.

From the contents of these information by the wobbling groove, in the CD-R, various information such as recording density, disk diameter and the like can be obtained. That is, the disk 90
When the disk drive is loaded, the disk drive (system controller 10)
The type of the type can be determined from the groove information.

3. Subcode and TOC Next, a description will be given of a subcode recorded together with main data on a CD-format disc and a TOC recorded in a lead-in area.

The minimum unit of data recorded on a CD disk is one frame. One block is composed of 98 frames. Fig. 9 shows the structure of one frame.
become that way. One frame is composed of 588 bits,
The first 24 bits are used as synchronization data, and the following 14 bits are used as a subcode data area. After that, data and parity are allocated.

One block is composed of 98 frames, and subcode data extracted from 98 frames are collected to form one block as shown in FIG.
The sub-code data (sub-coding frame) of the block is formed. First and second frames at the beginning of 98 frames (frame 98n + 1, frame 98n + 2)
Is a synchronization pattern.
Then, from the third frame to the 98th frame (frame 9
8n + 3 to frame 98n + 98), each of which has 96 bits of channel data, that is, P, Q, R, S, T, U,
V and W subcode data are formed.

Of these, P for managing access, etc.
Channel and Q channel are used. However, the P channel only indicates a pause portion between tracks, and the finer control is performed on the Q channel (Q1 to Q1).
Q96). The 96-bit Q channel data is configured as shown in FIG.

First, the four bits Q1 to Q4 are used as control data, and are used for discrimination of the number of audio channels, emphasis, CD-ROM, availability of digital copy, and the like.

Next, the four bits Q5 to Q8 are ADR, which indicates the mode of the sub-Q data. Specifically, the mode (sub-Q data content) is expressed by the four bits of ADR as follows. 0000: Mode 0: Basically, sub-Q data is all zero (used in CD-RW) 0001: Mode 1: Normal mode 0010: Mode 2: Indicates the catalog number of the disc 0011: Mode 3 ..ISRC (International St
0100: Mode 4 ... Used on CD-V 0101: Mode 5 ... CD-R, CD-RW, CD
-Used in multi-session systems such as EXTRA

The 72 bits Q9 to Q80 following the ADR are used as sub-Q data, and the remaining Q81 to Q96 are CR bits.
C.

The address is expressed by the sub-Q data when the mode 1 is indicated by the ADR. ADR = sub Q data and TOC in mode 1
The structure will be described with reference to FIGS. In the lead-in area of the disc, the sub-Q data recorded therein becomes the TOC information. That is, Q9 to Q8 in the Q channel data read from the lead-in area.
The 72-bit sub Q data of 0 has information as shown in FIG. FIG. 11 (a)
Shows the structure of FIG. 10B in the lead-in area as 7
This shows details of a 2-bit sub-Q data portion. The sub-Q data has data of 8 bits each,
Expresses TOC information.

First, a track number (TNO) is recorded with eight bits Q9 to Q16. In the lead-in area, the track number is fixed to “00”. Then Q17 ~
POINT (point) is described by 8 bits of Q24. Q25-Q32, Q33-Q40, Q41-Q48
MIN (minutes), SEC (seconds), FRAME (frame) as the elapsed time in the lead-in area
Is shown. Q49 to Q56 are set to “00000000”. Furthermore, Q57 to Q64, Q65 to Q72, Q
PMIN, PSEC, P
FRAME is recorded, but this PMIN, PSEC,
The meaning of PFRAME is determined by the value of POINT.

When the value of POINT is "01" to "99", the value of POINT means a track number,
In this case, in PMIN, PSEC, and PFRAME, the start point (absolute time address) of the track of the track number is minute (PMIN), second (PSE).
C), frame (PFRAME).

When the value of POINT is "A0", PM
The track number of the first track is recorded in IN.
Further, specifications such as CD-DA (digital audio), CD-I, and CD-ROM (XA specification) are distinguished by the value of PSEC. When the value of POINT is “A1”, the track number of the last track is recorded in PMIN. When the value of POINT is “A2”, the PMI
The start point of the lead-out area is the absolute time address (minute (PMIN), N, PSEC, PFRAME).
Seconds (PSEC), frames (PFRAME)).

For example, in the case of a disc on which six tracks are recorded, data is recorded as TOC based on such sub-Q data as shown in FIG. TO
C, the track numbers TNO are all "00" as shown. Block NO. Indicates the number of one unit of sub-Q data read as 98-frame block data (sub-coding frame) as described above. Each TOC data has the same contents written over three blocks. As shown, when POINT is "01" to "06", PMIN,
Tracks # 1 to # 6 as PSEC and PFRAME
The start point of track # 6 is shown.

When POINT is "A0", PM
“01” is shown as the first track number in IN. The disc is identified by the value of PSEC, and is "00" in the case of a normal audio CD. If the disc is a CD-ROM (XA specification), P
SEC = “20”.

When the value of POINT is "A1", P
The track number of the last track is recorded in MIN,
When the value of POINT is “A2”, PMIN, PSE
C, PFRAME indicate the start point of the lead-out area. After block n + 27, block n
.. N + 26 are repeatedly recorded.

In the program area and the lead-out area in which music and the like are recorded as tracks # 1 to #n, the sub-Q data recorded therein has the information shown in FIG. FIG. 11B shows the program area and the lead-out area in FIG.
FIG. 7B shows the structure of the sub-Q data of 72 bits in detail.

In this case, first, a track number (TNO) is recorded by eight bits Q9 to Q16. That is, for each of the tracks # 1 to #n, the value is any one of "01" to "99". In the lead-out area, the track number is "AA". Subsequently, an index is recorded in 8 bits Q17 to Q24. The index is information that can further subdivide each track.

Q25 to Q32, Q33 to Q40, Q41
Each of the 8 bits from Q48 to Q48 indicates MIN (minute), SEC (second), FRA as the elapsed time (relative address) in the track.
The ME (frame) is shown. Q49-Q56 is "00
000000 ”. Q57-Q64, Q65-Q
8 bits of 72, Q73-Q80 are AMIN, ASE
C, AFRAME, which are minute (AMIN), second (ASEC), and frame (AF) as absolute addresses.
RAME). The absolute address is an address continuously added from the head of the first track (that is, the head of the program area) to the lead-out area.

Basically, the subcode and the TOC formed by the subcode are as described above, but the subcode can further include various types of information. For example, T
In the OC, when the value of the pointer of the subcode Q is set to “F0”, PMIN, PSEC, PFRAM
The physical information of the medium is recorded in the area E. Specifically, the disk diameter, track pitch, linear velocity, media type, material, version, etc. are recorded. Therefore, when the disk 90 is loaded, the disk drive (system controller 10)
For example, the four types described above can also be determined from the subcode information.

4. Remaining recordable time display processing The remaining recordable time display processing of this example will be described below. In this example, when a CD-R is loaded in the disk drive, the remaining recordable time when recording, for example, audio data on the CD-R is displayed on the display unit 2.
By displaying the information on the display 5 and presenting it to the user, the user can determine whether or not a timely appropriate disc has been loaded in relation to the operation to be recorded.

System controller 1 when loading a disk
0 is shown in FIG. When the disk 90 is loaded in the disk drive device, the system controller 10 performs a process of reading management information from the disk 90 in step F101. In other words, the operation of turning on the spindle motor, setting at a predetermined number of rotations, turning on the focus search / focus servo, and turning on the tracking servo as the start-up processing is performed, and the data can be reproduced. Then, the management information recorded as the TOC or the wobbling groove is read. Loaded disc 90
In the case of a disc on which no data has been recorded yet, since the TOC data has not been recorded, the management information recorded as the wobbling groove is read. If the disc has already recorded TOC, management information necessary as TOC data or wobbling groove data may be read.

Subsequently, in step F102, the system controller 10 determines the disc type from the read management information. In this example, a 12 cm single density disc, 8 cm
The type is determined as a single density disk, a 12 cm double density disk, or an 8 cm double density disk. In this example, the type is determined from the above-described management information recorded as the TOC or the wobbling groove. For example, a 12 cm disk or an 8 cm disk can be determined based on a difference in moment of inertia. That is, since the time from when the spindle motor 6 is started to when the predetermined speed is reached differs depending on the difference in the disk weight, the time may be measured to determine the disk size. In the case of a single-density disk, that is, a conventional format disk, information indicating that the disk is a single-density disk may not be recorded in the groove or TOC management information. What is necessary is just to judge as a disk.

After disc type is determined, step F1
At 03, the process branches depending on whether or not the disc is a blank disc. If the disc is a blank disc, step F10
Proceeding to 4, the remaining recordable time is calculated based on the disc type. In the case of a blank disk on which recording has not yet been performed, the entire program area can be recorded. Therefore, the recording capacity can be specified directly from the disc type. And in this case, the data is A
Assuming that TRAC3 compression is performed, the recordable time of audio data is calculated. Incidentally, roughly speaking, 12c
An m-fold density disk can record about 2 hours of audio data without compression, but can record about 20 hours of audio data with ATRAC3 compression.

If it is determined in step F103 that the disc is not a blank disc, it is first determined in step F105 whether or not already recorded data is recorded as compressed data. For this reason, the discrimination is performed by reading a part of the recording data. In this example, for a blank disc or a disc on which ATRAC3 compressed data is recorded, the subsequent recording is also recorded as ATRAC3 compressed data. On the other hand, if uncompressed data is recorded, Uncompressed data shall be recorded. Therefore, the determination in step F105 is a process for determining whether to perform ATRAC3 compression when recording on the loaded disk 90.

Subsequently, in step F106, the remaining recording capacity is calculated from the disc type and the TOC data. This can be calculated, for example, by subtracting the already recorded data capacity, which can be calculated from the TOC data, from the total capacity that can be determined from the disc type. And step F107
Then, the recordable time of the audio data is calculated based on the calculated remaining capacity and the determination result of whether or not to perform the compression recording.

As described above, step F104 or F10
When the recordable time is calculated in step 7, the process proceeds to step F108, and the calculated time is displayed on the display unit 25.

The above is the processing at the time of loading the disc, whereby the user can confirm the recordable time of the loaded disc 90. Since this allows the user to simply check the recordable time for the loaded disc without being aware of the disc type (difference in capacity) and the presence / absence of data compression, recording will be performed in the future. Whether or not the disc is appropriate for the purpose, that is, whether or not the target recording is temporally feasible, can be determined. Considering that a CD-R is a write-once medium, the CD-R is used for, for example, a data backup application by utilizing the characteristic that data contents cannot be falsified or updated as described above. From the viewpoint of recording, it is suitable for applications such as, for example, sound recording of evidence for investigation and sound recording for investigation. In these cases, the fact that the user can simply recognize the recordable time is very suitable for the usability of the user. Of course, an example of recording audio data is described here, but the disk drive device may be configured as a video data recording device. In that case, it is suitable for recording video data from a surveillance camera.

Although the embodiments have been described above, the present invention is not limited to the above examples. For example, various modifications can be considered for the configuration of the disk drive device, the ATIP structure, the subcode structure, and the processing example when loading the disk. Further, other examples of the presence / absence of data compression and the type of the compression method can be considered. For example, compression of the MPEG audio system may be performed. Although the CD-R has been described as an example of the write-once recording medium, the present invention is also applicable as a recording / reproducing apparatus for other types of write-once media.

[0073]

As will be understood from the above description, according to the present invention, the type of the loaded write-once recording medium is determined, and at least the recordable time for the loaded write-once recording medium is determined using the determination result. It is calculated and displayed. In the case of performing compression processing on input data as one of the encoding processes of recording data, a recordable time for recording the compressed data is calculated and displayed. This allows the user to simply recognize the recordable time when loading the write-once recording medium without being aware of its type (capacity) or the presence or absence of compression processing. Can be selected. In particular, it is suitable for recording a long time of audio or video. In addition, the above-mentioned effect can be exerted in applications utilizing the characteristics of the non-rewritable write-once recording medium. For this reason, it is particularly suitable for use in recording audio and video for investigative evidence of organizations such as police and prosecutors, and in recording video and audio from surveillance video / microphones in stores and at home. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a disk drive device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a disk layout.

FIG. 3 is an explanatory diagram of a wobbling groove.

FIG. 4 is an explanatory diagram of ATIP encoding.

FIG. 5 is an explanatory diagram of an ATIP sync waveform.

FIG. 6 is an explanatory diagram of an ATIP sync waveform.

FIG. 7 is an explanatory diagram of an ATIP frame.

FIG. 8 is an explanatory diagram of the contents of an ATIP frame.

FIG. 9 is an explanatory diagram of a frame structure of a CD system.

FIG. 10 is an explanatory diagram of a sub-coding frame of the CD system.

FIG. 11 is an explanatory diagram of sub-Q data of the CD system.

FIG. 12 is an explanatory diagram of a TOC structure of a CD system.

FIG. 13 is a flowchart of a process when a disc is loaded according to the embodiment.

[Explanation of symbols]

1 pickup, 2 objective lens, 3 biaxial mechanism, 6
Spindle motor, 10 system controller, 1
2 encoding / decoding unit, 14 servo processor, 24 operation unit, 25 display unit, 80 host computer, 90 disk

Claims (2)

[Claims] 1. A recording apparatus for recording information on a write-once write-once recording medium, comprising: a recording processing means capable of performing a predetermined encoding process on input data to record on a loaded write-once write-once medium; Determining means for determining the type of the loaded write-once recording medium; display means; calculating a recordable time for the loaded write-once recording medium using at least the determination result of the determining means, and displaying on the display means A recording device comprising: 2. The recording processing means performs a compression process on data input as one of the encoding processes, and the control means sets a recordable time for recording the compressed data. The recording apparatus according to claim 1, wherein the recording is calculated and displayed on the display unit.