JPH0512840A - Optical disk recorder - Google Patents

Abstract

PURPOSE:To record a program so as to enable a sufficiently high-accurate program searching to be conducted with the function of a conventional reproducing device. CONSTITUTION:Input data inputted in sequence in the form that the intervals among plural music pieces are devided by silence spaces is recorded by the optical disk recorder adding sub-code data to the inputted data including a track number TNO for indicating each music part and an index number X. Whether it is in the vicinity of a starting position including the starting part of each music of the input data or not is detected a sound/silence detecting section 321. When being in the starting vicinity is detected, information for combining the track number TNO and the index number X recorded on a disk is controlled so as to be automatically incremented at a time interval corresponding to the accuracy of a desired program searching by an increment control section 322.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording apparatus such as a write-once optical disk (hereinafter referred to as "CD-WO") and an erasable optical disk (hereinafter referred to as "CD-MO"), and more particularly to an optical disk recording apparatus. The present invention relates to an optical disk recording device that enables simple cueing.

[0002]

2. Description of the Related Art "Cueing" during CD reproduction in a CD player for reproducing an optical disk, for example, a CD (compact disk) is usually recorded in advance in a lead-in area by a disk manufacturer or the like. The approximate position is obtained based on the TOC (table of contents) table of contents information, and then the final position is obtained using the track number and time code in the subcode Q channel information recorded with the program information in the program area. Alternatively, the index number in the subcode Q channel information is used. In a commercially available CD, the time timing information is accurately managed by using a commercial management device at the time of creation, and it is accurate in correspondence with a unit of program information, for example, a position a predetermined amount before the true start position of the music. Since it is attached to, it can be effectively used for cue control. By the way, the accuracy of cueing in music, etc., varies depending on the type of music itself, but it is sometimes required to play the beginning of the song with a time lag of about 0.2 s or less, and basically, It is necessary to always generate the sound part of the music at the same time lag from the accessed music head position.

On the other hand, a disc such as a CD-WO or a CD-MO allows a user to record an arbitrary program. In this case, reproduction of the recorded disc can be performed by using a normal CD player, but at this time, it is desirable that the above-mentioned cueing function can be performed similarly to a commercially available CD. However, it is difficult to match the TOC information or the subcode Q channel information to the true beginning of the music piece with a predetermined accuracy because the recording of the disc is left to the user side.

For example, when using a normal input source,
Naturally, there may be a silent part with a random length at the beginning of the song depending on the variation between songs and the song type, so when this is called "flow recording", the recording device recognizes that it is the beginning of the song. Even though the subcode or TOC is started to be created, an irregular time lag occurs in which the voiced part of the song has not actually started yet. Therefore, when reproducing these recording discs, even if the cue control is performed using the subcode and TOC, a commercially available CD is used.
It is impossible to find a cue in a uniformly controlled manner, such as. Furthermore, it is absolutely impossible to always generate a sound part with a time lag of about 0.2 s or less.

[0005]

DISCLOSURE OF THE INVENTION CD-WO and CD
-In the case of MO etc., if the input program source side is provided with a time code in advance, at the time of recording, accurate cue information is recorded based on this time code, subcode Q channel information or index information. can do. However, this is not available in the case of an input program source without a time code, and so-called "flow recording" of broadcasting or the like cannot be performed. In addition, adding a time code synchronization function to a recording device naturally leads to an increase in the cost of the device and is not a good idea.

On the reproducing side, for example, on the side of a CD player, it seems that the cue control may be performed by using the time code in the subcode Q channel information. However, the cue control using the time code is performed. Function is general C
The D player is hardly equipped and has no versatility. That is, in order to create a disc that can be used in a normal CD player, a method of performing cue control using a time code is not suitable.

The present invention has been made in view of the above-mentioned circumstances, and is an optical disk recording capable of recording a program so that the function of an ordinary reproducing apparatus can perform a sufficiently accurate cueing. The purpose is to provide a device.

[0008]

In the optical disk recording apparatus according to the present invention, input data sequentially input in a form in which a plurality of unit program signal sections are separated by a silent space is used as each unit program. In an optical disk recording apparatus for recording auxiliary data including data corresponding to at least one of order information and free header information representing a signal part, is it a head vicinity part including the head of each unit program signal part of input data? And a time interval corresponding to a required cueing accuracy for at least one of the order information and the free heading information to be recorded on the disc when the vicinity of the tip is detected by the means. And a means for controlling so as to update automatically.

[0009]

In the optical disk recording apparatus of the present invention, the unit program signal portion, for example, the head portion of a music piece is detected, and at least one of the order information such as the track number and the free heading information such as the index number is found at the head portion. Since it is automatically updated and recorded at a time interval corresponding to the accuracy, order information or free heading information is attached at the beginning of the unit program signal section with the required cueing accuracy, and the order information that is normally equipped in the playback device. Alternatively, the search function for free headline information can be effectively used to perform high-precision cueing. According to the present invention, since the order information or the free heading information, which is the original cue mark, can be effectively used, extremely accurate cueing can be realized even if the recorded disc is used in a normal reproducing apparatus. can do.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an optical disk recording apparatus according to an embodiment of the present invention.

In FIG. 1, the optical disk 21 is rotationally driven by a disk motor 22 in the direction of the arrow shown.
The rotation speed of the disk motor 22 is the disk servo circuit 2
The linear velocity is controlled to be constant by 6. The rotation speed of the disk motor 22 in this case is calculated by the system controller 29 based on the position information of the optical head 23.

The optical head 23 has a semiconductor laser, an optical system, a focus actuator, a tracking actuator, a quadrant photodiode, and the like, which are not shown, built therein. The optical head 23 irradiates the surface of the optical disc 1 with a laser beam. To write the recording pit.

Focus and tracking servo circuit 2
8 controls focusing and tracking of laser light emitted from the semiconductor laser in the optical head 23 in response to a command from the system controller 29. In tracking control, the optical head 23 is controlled by detecting a guide groove formed on the optical disk 21, and the laser light spot of the optical head 23 is caused to follow the guide groove. The feed servo circuit 27 drives the feed motor 30 according to a command from the system controller 29 to drive the optical head 2
3 is moved in the radial direction of the optical disk 21.

The input signal to be recorded on the optical disk 21 is
In the case of a digital signal, it is directly input to the data signal forming circuit 32, and in the case of an analog signal, it is input to the data signal forming circuit 32 via an A / D (analog-digital) converter 34. The sampling frequency and the number of data bits of this input data comply with the CD standard.

The TOC generator 40 generates TOC information as the table-of-contents information during writing of the program information or after the writing is completed, and outputs the TOC information to a TOC memory described later.

The data signal forming circuit 32 detects whether the input data is voiced or not, and controls the sub code generator 42 accordingly. That is, when the silence is detected, the data signal forming circuit 32 determines the track number TNO.
Is incremented by "1" (that is, "01") and the increment operation of the index number X is started, and when a sound is detected, the increment operation of the index number X is stopped.

The sub-code generator 42, based on the timing signal output from the system controller 29 and the control by the data signal forming circuit 32, stores the track number TNO, the index number X, the program time, the absolute time, etc. when the program information is recorded. Generates and outputs subcode information.

Further, the data signal forming circuit 32 interleaves the input data, adds a sub code and an error check code, and performs EFM modulation (eigh
t-to-fourteen modulation) to form and output a series of serial data in a format and transfer rate conforming to the CD standard. Further, the data signal forming circuit 32 is
When the recording of the program information is completed, the TOC memory 44
The TOC information output from is input, formed into a predetermined format, and output.

The details of the data signal forming circuit 32 and the subcode generator 42 are shown in FIG. In Figure 2,
A TOC generator 40 and TOC memory 44 are also shown.

The data signal forming circuit 32 has a sound / silence detecting section 321, an increment control section 322, a signal forming section 323, and an EFM modulating section 324.

The sound / silence detection section 321 detects whether the input data has sound or no sound. In the case of this embodiment, about 2 s (= 150 frames = 1) is used for detecting the voice and the silence, respectively.
5 indexes). That is, voice /
The silence detector 321 detects silence about 2 s (15 indexes) after the input data changes from the voiced state to the silence state, and detects the voiced about 2 s after the input data changes from the silence state to the voiced state. To be detected.

The increment controller 322 determines the track number TNO and the index number X of the sub-code generator 42 based on the detection result of the sound / silence detector 321.
Control the increment operation of. That is, once the silence is detected, the increment controller 322 increments the track number TNO by “1” and starts the increment operation of the index number X. The increment interval during the increment operation of the index number X is a value according to the desired cue time, for example, 1
If the index number X reaches 99 before the sound is detected, the track number T is set to 0 frame (= 133 ms).
The operation of again incrementing NO by "1" and returning the index number X to "00" and further incrementing the index number X is repeated. The increment controller 322 stops incrementing the index number X of the sub-code generator 42 when a sound is detected. The track number TNO and the index number X generated by the sub code generator 42 are transferred to the TOC generator 40 as necessary, and the TOC generator 40 is transmitted.
Used for information generation.

The signal forming section 323 interleaves the input data, and also subcode generator 4
The sub code and the error check code given from 2 are given to the EFM modulator 324. The EFM modulation unit 324 EFM-modulates the data supplied from the signal forming unit 323 into write data, and supplies the write data to the drive interface 25.

In the TOC generator 40 and the sub-code generator 42, recording start (REC START) and recording stop (REC ST) are performed by operating the input device 2 or the key switch 5 via the system controller 29.
OP), song number, that is, track number increment (TR
ACK INC), index number increment (INDEX INC) and TOC recording (TOCR)
Key input such as EC) is given.

The output data of the data signal forming circuit 32 is
It is inputted to the data signal correction circuit 36 via the drive interface 25. The data signal correction circuit 36 is
The waveform of the data signal is corrected by the heat storage effect of the laser light according to the bit equivalent length and the immediately preceding blank equivalent length. That is, the data signal correction circuit 36
The positional deviation between the data signal timing and the recording pits and blanks due to the heat storage effect of the laser light on the recording surface of the optical disc 21 is reduced by increasing or decreasing the data signal timing, and the increase of the recorded bit width is reduced. This is prevented by dividing the timing.

The output data of the data signal correction circuit 36 is
It is input to the laser generation circuit 35. Laser generation circuit 35
Performs recording by irradiating the recording surface of the optical disk 21 with the semiconductor laser light in the optical head 23 according to the data signal. In this way, data is recorded on the optical disc 21 in a format, a transfer rate and a linear velocity that conform to the CD standard.

The TOC memory 44 sequentially stores the time code information such as the track number TNO, the index number X, the program time and the absolute time, which are created by the sub code generator 42, in synchronization with the writing operation on the optical disk 21. In addition, it is a memory that appropriately stores input information such as alphabets and numerical values input from the input device 2, and finally forms information (TOC) to be written in the lead-in area.

Further, the work memory 46 is used for the contents of calculation associated with the above data processing, the temporary storage of the progress, the data stack at the time of recording interruption, and the like.

Next, the recording operation of the optical disc recording apparatus of this embodiment having the above structure will be described. Figure 3
FIG. 4 shows a time chart relating to the operation of this embodiment.

In this case, it is assumed that the input source has been roughly preedited for recording on the disc. That is, the input source is a reproduction signal of the music pieces to be recorded arranged in the order in which they are to be recorded, and an appropriate silent space is secured between the music pieces to be recorded in advance on a master tape or the like.

When the unrecorded optical disk 21 is set on the disk tray and the recording start (REC) key of the input device 2 or the key switch 5 is pressed, the recording of the first music is started. In this case, when the optical head 23 reaches the start point of the program area, the sub code generator 42 starts the program time and the absolute time, the track number TNO is "01", and the index number X is "0".
The subcode is generated as "1", and the increment of the index number X is started.

At this time, among the subcodes generated by the subcode generator 42, those that need to be written in the lead-in area are the system controller 29 and T.
It is supplied to the TOC memory 44 via the OC generator 40 and stored therein.

The data signal forming circuit 32 inputs the program information and the subcode information, generates a signal of a predetermined format, and supplies the signal to the optical head 23 via the drive interface 25. As a result, the program of the first song is recorded.

At the time t _A , the index number X is 10 frames (= 1
Every 33 ms), the voice / silence detection unit 32 is incremented when the index number X becomes “16”.
At 1, the voiced sound is detected, the increment of the index number X is stopped, and thereafter the index number X remains "16" until time t _C.

When the input source becomes silent at time t _B , the sound / silence detection section 321 starts detecting silence, and it is determined at time t _C that the input source is a silent section. When silence is detected, the increment control unit 322 controls the subcode generator 42 to increment the track number TNO by “1” to “02”, and further sets the index number X from “01” to every 10 frames. Increment sequentially. If the index number X becomes “99” before the presence of a sound is detected next, the increment control unit 322 further increments the track number TNO by “1” to “03”, Increment the number X for every 10 frames by "01"
To continue.

At time t _D , the recording of the program of the second music is started, and when the input source becomes the voiced state, the voiced / silent detection section 321 starts the voiced detection. The index number at this time is "04", and after 15 indexes, that is, when the index number becomes "19", it is determined to be a sound part, the increment of the index number X is stopped, and thereafter, the time t _F is reached. Until then, the index number X remains "19".

When the input source becomes silent at time t _E , the sound / silence detection section 321 starts detecting silence, and at time t _F , it is determined to be a silent section. When silence is detected, the track number TNO is incremented by "1" to "04", and the index number X is set to "0".
It is sequentially incremented every 10 frames from 1 ".

Thus, the sound / silence detection section 321 and the increment control section 322 of the data signal forming circuit 32.
The track number TNO and the index number X are controlled by.

The subcode including the track number TNO and the index number X is generated by the subcode generator 42.

In this way, the sub-code generated by the sub-code generator 42 is given from the signal forming section 323 to the EFM modulating section 324 together with the interleaved input data and error check code.
The data is FM-modulated and supplied to the drive interface 25 as write data.

When the pause (PAUSE) key or the stop (STOP) key of the input device 2 or the key switch 5 is pressed, the recording operation is interrupted or stopped. At this time, the data contents of the sub code generator 42 and the TOC generator 40 are transferred to and stored in the work memory 46 via the system controller 29.

When the recording operation is restarted, the sub-code generator 42 and the TOC generator 40 load the data just before the interruption from the work memory 46 and restart the operation. After that, the same operation is performed every time the recording operation is started, interrupted, or stopped.

In this embodiment, when the print (PRINT) key in the input device 2 or the key switch 5 is pressed, of the contents stored in the work memory 46 up to that point, those relating to the interruption are passed through the printer 7. So that it can be printed out. Also, a time code table can be printed out based on the contents of the TOC memory 44.

When the TOC recording (TOC ENTER) in the input device 2 or the key switch 5 is pressed at the time when the recording of all the programs is finally completed, the contents stored in the TOC memory 44 are used as TOC information in the lead-in area. Writing, this completes all recording operations.

When the optical disc 21 recorded in this way is reproduced, the index number corresponding to the beginning of each song is checked in advance. For example, the first song specifies track 1-index 1 and the second song. By specifying track 3-index 4 and using the so-called index search function, it is possible to perform cueing with sufficient accuracy. Some classical music CDs, etc., on which index numbers are pre-recorded so that the desired part can be played back are commercially available. To use this, the index search function is used in most ordinary playback devices. All are standard equipment. If the track number and the index number indicating the head position of each song described above are given from the subcode generator 42 to the TOC generator 40 so as to be recorded on the optical disc 21 as TOC information, the cueing of this embodiment is more effective. Functions are available.

When a source for which the above-described pre-editing has been performed in advance is supplied by broadcasting or the like, it is also possible to perform so-called flow recording of such a source.

In the present invention, the index number is incremented only in the vicinity of the beginning of each song, that is, in the voiced part and in the silent part. Suitable for disc recording. That is, 133m
If the track number and the index number are continuously incremented at s intervals, the capacity of the track number and the index number according to the CD standard will be full in about 20 minutes, and the program accommodating time reaches about 60 minutes. Since it will not be enough, it cannot be used for cueing the entire disc. According to the present invention, the increment interval of the index number can be made narrower in order to further improve the cueing accuracy.

In the embodiment, the combination of the track number and the index number is increment-controlled, but instead of this, only one of them may be increment-controlled. Alternatively, order information similar to these other than the index number or free headline information may be used.

Of course, the unit of the program forming the unit program is not limited to the music, but may be any unit as long as it is a unit of movement or other program information.

[0050]

As described above, according to the present invention,
The order information or free heading information, which is the original cue mark, is added to the beginning of the unit program signal section with the required cueing accuracy to make effective use of these, and the function of a normal playback device Thus, it is possible to provide an optical disk recording apparatus capable of recording a program so that the cue can be performed with sufficiently high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an optical disc recording apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a main part of the embodiment of FIG.

FIG. 3 is a schematic timing chart for explaining the operation of the embodiment of FIG.

FIG. 4 is a timing chart for explaining a part of FIG. 3 in detail.

[Explanation of symbols]

2 ... input device, 5 ... key switch, 6 ... display,
7 ... Printer, 22 ... Disk motor, 23 ... Optical head, 25 ... Drive interface, 26 ... Disk servo circuit, 27 ... Feed servo circuit, 28 ... Focus and tracking servo circuit, 29 ... System controller, 30 ... Feed motor, 32 ... data signal forming circuit, 34 ... A / D converter, 35 ... laser generating circuit, 3
6 ... Data signal correction circuit, 40 ... TOC generator,
42 ... Subcode generator, 44 ... TOC memory,
46 ... Work memory, 321 ... Sound / silence detection unit, 32
2 ... Increment control unit, 323 ... Signal forming unit, 32
4 ... EFM modulator.

Claims (1)

Claim: What is claimed is: 1. Input data sequentially input in the form of a plurality of unit program signal sections separated by a silent space, and sequence information indicating each unit program signal section in the input data and In an optical disc recording apparatus for additionally recording auxiliary data including data corresponding to at least one of free header information, means for detecting whether or not it is a head vicinity portion including the head of each unit program signal portion of input data, , When at least one of the order information and the free heading information to be recorded on the disc is detected by this means when it is detected to be a portion in the vicinity of the leading edge, it is automatically controlled at a time interval corresponding to a required cueing accuracy. An optical disc recording apparatus comprising: