JPH10116483A - Optical disk device and optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record an input signal with the format of optical recording disk when the signal is inputted in a specified time code, and to generate the original specified time code to add the code to an output signal when the signal is reproduced. SOLUTION: When an inputted signal is recorded on an optical disk 1, the time codes at the head and end of the recording track are latched to additionally record the time code identifying character and the character which identifies the type of time code in the track name of UTC(User Table of Contents). When the input signal is reproduced, the time code of the specified type inputted from the total recording time of the track is calculated to add the same time code as that originally inputted to the output signal. Thus, the recording or reproduction of time code synchronized editing or the like is easily performed which being connected to another recording device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of recording and reproducing a signal having a time code as an input signal by a recording and reproducing apparatus having no time code such as a mini disc (MD). The present invention relates to an optical disk device that enables reproduction.

[0002]

2. Description of the Related Art In a mini disc (MD), a signal is recorded and reproduced on the basis of TOC (Table Of Contents) as time information. However, for each frame of a signal such as image information recorded and reproduced by a VTR or the like. When a signal having a contained time code is recorded and reproduced on an MD, it is not possible to record and reproduce a so-called time code signal for each frame and output it.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain a predetermined time code signal output in a recording / reproducing apparatus having a recording format such as an MD which does not have a time code output.

[0004]

SUMMARY OF THE INVENTION The present invention provides a means for demodulating an input signal to obtain a time code, and a method for starting the recording of the input signal or changing the timing of the head of the track at which the track to be recorded is switched. An optical disc apparatus comprising: a time code latch unit for latching the time code; and a unit for recording the time code in a UTOC area of a track on which the input signal is recorded.

Further, according to the present invention, there is provided a means for obtaining a time code of an input signal, and latching the time code at the start of a track at which recording of the input signal is started or a track to be recorded is switched. An optical disc device comprising a time code latch means and means for recording the time code in a UTOC area of a track on which the input signal is recorded.

Further, the present invention provides a means for demodulating an input signal to obtain a time code, and a method for starting recording of the input signal or switching between tracks to be recorded, and the time at the beginning and end of the track. An optical disc apparatus comprising: a time code latch unit for latching a code; and a unit for recording the time code in a UTOC area of a track on which the input signal is recorded.

The present invention also provides a means for demodulating an input signal to obtain a time code, and detecting the time code at the beginning of a track at which recording of the input signal is started or a track number is switched. Time code latch means for latching the time code, detecting the time code at the end of the track before the recording of the input signal ends or before the track number is switched, and latching the time code; An optical disc apparatus comprising means for recording the time code of the recording start and end of the track in the UTOC area of the track on which the recorded signal is recorded.

The present invention also provides recording means for compressing an input signal into audio, temporarily storing the compressed signal in a memory via a vibration-proof memory controller, and recording the signal read from the memory on an optical disk via an EFMCIRC encoder. Means for demodulating an input signal to obtain a time code, and a time code latch for latching the time code at the beginning of a track at which recording of the input signal is started or a track number is switched by the recording means. Means and a UTO of a track on which the input signal is recorded.
This is an optical disk device including means for recording the time code in the area C.

The present invention also provides recording means for compressing an input signal into audio, temporarily storing the compressed signal in a memory via an anti-vibration memory controller, and recording the signal read from the memory on an optical disk via an EFMCIRC encoder. Means for demodulating an input signal to obtain a time code; and a time for the recording means to start recording of the input signal or to latch the time code at the beginning and end of a track at which a track number is switched. An optical disc device comprising: a code latch unit; and a unit for adding and recording the time code in a UTOC area of a track on which the input signal is recorded.

Further, the present invention provides a time code demodulator for demodulating a time code signal of an input signal, a time code type discriminating means for detecting and discriminating the type of the time code, and the time code demodulator. Time code latch means for latching the time code demodulated at the timing at which recording of the input signal is started or the timing of the head of the track at which the track is switched, and the UTOC area of the track at which the input signal is recorded. An optical disc device including a unit for recording the time code.

Further, the present invention is an optical disc apparatus provided with recording means for recording time code information in a track name recording area of a UTOC.

Also, the present invention provides an optical disc having a discriminating means for discriminating the type of time code from an input signal, and a recording means for adding an identification signal indicating the discriminated type of time code to the time code and recording the time code. Device.

Further, the present invention is an optical disc apparatus for recording a time code by adding, to the time code, a signal identifying the time code and an identification signal identifying the type of the time code.

Further, the present invention relates to an optical disk having a UTOC area having an area for recording time code information of a head of a recorded track or the beginning and end of a track and an area for recording a signal for identifying the type of the time code. is there.

Also, the present invention provides a method for reproducing an optical disc and
Recording start time code T of track included in area C
An optical disc apparatus comprising: means for detecting a and a type of time code; and means for outputting a time code based on the detected time code Ta.

The present invention also relates to a method for reproducing an optical disc and
Means for detecting a recording start time code Ta, a recording end time code Tb, and a type of time code of a track recorded in the C area; and an original time code signal from the detected time codes Ta, Tb, and the type of time code. This is an optical disk device including a conversion unit for converting the data into a data.

The present invention also provides a means for reading a signal recorded in the UTOC of an MD, detecting a time code identification signal and recognizing the recorded time code and type, and a head of a track of the recognized time code. , The time code Tb at the end of the track, and the actual time lengths T and M of the track.
Means for calculating a time code of {Ta + (Tb−Ta) / T × t} in accordance with the output signal of the track to be corrected and reproduced by the time t by the operation clock of D; This is an optical disc device including a modulating means for modulating and outputting.

The present invention also provides a means for reading out a track name signal recorded in the UTOC area of an MD, detecting the signal, recognizing the recorded time code and type, and a method for recognizing the head of a track of the recognized time code. The time code Ta of the timing, the time code Tb of the timing at the end of the track, the actual time length T of the track, and the time t according to the MD operation clock are corrected, and according to the output signal of the track to be reproduced, ΔTa + (Tb−Ta) ) / T ×
calculating means for converting the time code of t｝, and when converting and editing the track, the time code at the beginning and end of each divided track is calculated by the converting means.
This is an optical disk device having means for recording in TOC.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the optical disk apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an optical disk device according to an embodiment of the present invention, and FIG. 2 is a block diagram for explaining a main part thereof. When the cartridge 2 containing the mini disc (MD) 1 is mounted on the optical disc apparatus of the present invention, the system controller 3 drives the spindle motor 5 via the servo control circuit 4 to rotate the mini disc 1.

The system controller 3 drives the feed motor 6 via the servo control circuit 4 and
Is moved to the inner circumference side of the mini disc 1 and the UTOC (User T
The information is read out, and the EFM (Eight to Fourtee) is read out via the RF amplifier 8 and the address decoder 9.
n Modulation) CIRC (Cross Interleave Read-Solo)
mon Code) demodulated by the encoder / decoder 10, stored in the DRAM 12 via the anti-vibration memory controller 11, read out by the system controller 11, and displayed on the display 14 track name information such as a table of contents of the information recorded on the mini disc 1. indicate.

While viewing the contents displayed on the display 14, the operator uses the keys 15 to perform an operation input. According to the displayed contents, for example, in order to select and reproduce the second music, the second music recorded is reproduced by inputting 2 with the numerical designation key of the key 15.

The system controller 3 includes a DRAM 12
The UTOC information is fetched into the control memory from the information stored in the control memory as the start and end address information of each track (song), and the feed motor 6 is sent via the servo control circuit 4 to the designated start address of the second tune. Optical pickup 7
And the signal read by the optical pickup 7 is converted to an RF signal.
The reproduction of data recorded at a predetermined address (TOC) in the program area of the mini disc 1 via the amplifier 8 and the address decoder 9 is started.

The signal read from the position of the head of the second song is sent to the EFMCI via the optical pickup 7 and the RF amplifier 8.
The signal is demodulated by the RC encoder / decoder 10, stored in the DRAM 12 via the anti-vibration memory controller 11, and read out in a time division manner through the anti-vibration memory controller 11 while maintaining a predetermined storage amount.
The original continuous signal is time-expanded through an Acoustic Coding encoder / decoder, the audio signal is output from an output terminal 20 as an analog signal via a DA converter 18, and the digital signal output is output from the output terminal 20 as it is.

Next, the operation of recording the time code on the MD will be described with reference to FIGS. Among the signals input to the optical disk device of the present embodiment, analog signals such as audio signals are input from the input terminal 19 via the AD converter 17. Also, the digital signal is sent directly from the input terminal 19 to ATRAC.
The signal is input to the encoder / decoder, subjected to signal compression processing, and transmitted to the DRAM 12 via the anti-vibration memory controller 11.
Is stored temporarily.

The data temporarily stored in the DRAM 12 is
Read through the anti-vibration memory controller 11 and EF
The signal is modulated into an MD format signal by the MCIRC encoder / decoder 10, and a recording signal is input to the recording head 24 via the head driving circuit 23 so that the mini disc 1
Are sequentially time-axis-compressed and recorded in the MD format.

When the time code data is input simultaneously with the input signal, the time code input from the time code input terminal 21 is demodulated by the time code demodulation circuit 16-1.

The format of the time code is defined by the IEC standard Publication 461, and is usually SMPTE /
EBU (Society of Motion Picture and Televisi
onEngineers / European Broadcasting Union) time code, and includes the following types.

30 frame drop frame type
(For NTSC color video) 30 frame non-drop type TSC (for monochrome video) 25 frame non-drop type (EBU type)
(For PAL video) 24 frame non-drop type (for film application) Whether or not the time code has been dropped is determined by "1" or "1" of DROP FRAME FLAG in 80 bits of the standard time code format. 0 "is detected. If “1”, it is a drop frame. The number of frames per second is measured to detect the type. Alternatively, there is a method of comparing the frame values and measuring the maximum value. For example, when the DROP FRAME FLAG is “1” and the maximum frame value is 30, a 30 frame drop frame type is set. In order to distinguish these types, identification signals such as identification characters B, C, D, E, etc. are added and identified.

The time code conversion processor 16-3 converts the time code into the MD time code. The TOC of the MD and the time code are converted so as to correspond to the frame. For frames, the MD code is 86.7 Hz, whereas the NTSC (color video) time code is 29.97.
Hz, and the resolution of the MD is higher, so a maximum of about ± 1
The phase shift is within 1 ms. Although the phase shift amount at the time of the synchronization control is a level that does not cause any problem, for strict time code synchronization, the phase shift information is detected, and the correction information is recorded together with the identification character for distinguishing the type of the time code, During reproduction, phase correction is performed based on this correction information.

The converted time code is input to the system controller 3, and the latch circuit 16-4 receives the recording start timing or the timing at which the track number is switched.
, The start time code to be stored is latched. The end time code to be stored as the track name is latched by the latch circuit 16-4 at the recording end timing or when the track is switched. The latched time code is recorded in the track name storage area of the UTOC area together with the time code recognition character code "A".

FIG. 3 is a conceptual diagram of the data structure of the name information storage sector of the UTOC of this embodiment. A basic configuration is made up of a sector number "1" indicating the name information storage area in the UTOC data, an item indicating the name, and the name. The name is ASC
II (American Standard Code)
Information Interchange) code. One disc name and a maximum of 255 track names can be stored. Although the maximum number of characters in each name is 1792 characters, since the total capacity of the UTOC is 1792 characters, the number of characters is distributed in advance to each track so that a plurality of track names can be stored.

The track name of the track number 1 (TNO.1) in FIG. 3 is "Prelude", and if a 16-digit number is included after "A", it is determined that the time code information is included. "1200000" after "A"
“012023025B”, “12000000” represents the time code at the beginning of the track.
Indicates that the frame is 00:00:00. “1202
3025 "represents the time code at the end of the track,
This is 12: 02: 30: 30 25 frames. “B” following the numeral indicates the type of time code, and is a 30-frame drop type.

To indicate the time code information, 18 characters including the "A" character per track are required. Although there is a limitation of 1792 characters including the disc name, time code information can be allocated and recorded on a maximum of 99 tracks. There is no practical problem by providing a monitor for the number of characters recorded in the name and a limiter for the number of characters for the recording operation.

The time code information may be recorded not in the name information storage area but in a time code information storage area provided exclusively for the UTOC area.

FIG. 4 is a conceptual diagram of the data configuration of the time code information storage sector of the UTOC of this embodiment. The data recorded in the time code information storage sector includes a sector code "X" indicating the time code information storage area in the UTOC data, and a track number (1 to 25).
5), the time code at the beginning of each track, the time code at the end of each track, information indicating the type of time code, and phase information.

The phase information is the minimum unit S of the MD address starting from the frame start of the input time code.
The time until the start of G (Sound Groop) is represented by the number of sampling pulses. The phase information is represented by 12 bits including 2's complement, including the polarity. This phase information need not be recorded if the phase shift can be ignored. If the phase correction control information bit is set to 0, no phase correction is performed. For the time code information, one digit is a 4-bit BCD (Binary C
ode Decimai) Recorded in code. 1 per track
This becomes 0-byte data, and time code information of up to 167 tracks can be recorded in the time code information storage sector.

If "A" is at the beginning of the track name read from the disk 1, and the subsequent time codes are Ta and Tb, the actual name of the track on which the time codes Ta and Tb are recorded in the track name is shown. When the time length is T, the operation clock time t of the MD is corrected by the ratio of time correction (Tb−Ta) / T, and the time code Ta + (Tb
−Ta) / T × t is converted to a time code conversion processor 16 −
Calculate at 3. The converted time code is modulated by the time code modulation circuit 16-2 and output from the output terminal 22.

Next, the recording operation of this embodiment will be described. FIG. 5 shows a recording operation on a mini disc (MD) when a signal to be recorded is input with a time code added.
This will be described with reference to the recording flowchart shown in FIG. The time code signal input from the time code input terminal 21 is demodulated by the time code demodulation circuit 16-1.
It is determined which of the standards of the EBU time code corresponds, and if no time code is input, normal MD recording is performed (S1).

The time code conversion processor 16 and the system controller 3 detect the input time code from the frame period and the DROP FRAME FLAG to detect the type of the time code, and reproduce the signal recorded in the MD recording format to reproduce the original signal. It is checked whether or not the time code is obtained, and a storage map of the TOC and the time code coefficient is created (S2).

When the recording start is instructed by the key 15 for instructing the recording start or stop, the system controller 3 detects this (S3). The time code input from the time code input terminal 21 and the input signal input from the input terminal 19 are input in synchronization with each other.
The data is compressed by the RAC encoder / decoder 13 and the DRAM 12 is
Is stored in

The system controller 3 includes a DRAM 12
The signal stored in the EFM CIRC encoder / decoder 10 is read out via the anti-vibration memory controller 11.
Then, a signal that has been compressed on the time axis in the MD recording format is input to the head drive circuit 23, and recording on the mini-disc 1 is started by the recording head 24 (S4).

The time code Ta synchronized with the recording signal of the start of recording on the mini disc 1 is latched by the latch circuit 16-4 of the time code conversion circuit 16 (S5).

Until the recording stop key is pressed (S6), the key 15 for incrementing the track number is operated.
(S7), the recording is continued, the track number is incremented (S8), and when the recording track is changed, the time code Tb at the track end is latched by the latch circuit 16-4 (S9), and the time code type identification code At the same time, the time code Ta at the head of the track and the time code Tb at the track end are stored in a memory in the system controller 3, and are stored in the memory every time the track is incremented.

When the recording is completed and the stop key is pressed or a stop code is input as an input signal, the system controller 3 detects this and stops recording on the track (S).
6).

At this time, the time code conversion circuit 16
The track end time code Tb is latched by the latch circuit 16−
4, the data is stored in a memory in the system controller 3, the optical pickup 7 and the recording head 24 are moved to the UTOC area of the mini disc 1 via the servo control circuit 4, and added to the UTOC recording information to obtain a time code. , For example, A, and the time code Ta, Tb of each track and an identification character for identifying the type of time code, for example, B, C, D, E, are added to the track name of each track. (S11) and UTO
Recording is performed on the area C (S12).

The input recording signal is recorded on each track of the mini-disc 1 after being compressed on the time axis, and the position of the signal recorded as TOC information on each track of the mini-disc can be detected. Therefore, the time code of the original input signal can be reproduced at the time of reproduction by recording the first and last time codes of each track in the UTOC area.

Next, the reproducing operation of the optical disk device of this embodiment will be described. FIG. 6 is a flowchart at the time of reproduction. When the mini disc 1 is loaded into the optical disc device, the optical pickup 7 is moved to the UTOC area recorded on the inner periphery of the mini disc 1 by the feed motor 6 controlled by the servo control circuit 4, and the mini disc 1 is moved. It is controlled and driven to a predetermined rotation by the spindle motor 5 (S
1).

The UTOC information recorded on the mini disc 1 is read by the optical pickup 7, demodulated by the EFMCIRC encoder / decoder 10 via the RF amplifier 8 and the address decoder 9, and temporarily stored in the DRAM 12 via the anti-vibration memory controller 11. The system controller 3 takes in the name information for each track from the read data into a memory and stores it. At this time, an identification character A for identifying a time code as the name information is detected, and whether or not the characters B, C, D, and E indicating the type of the time code are detected and output. Recognize what type of timecode should be
(S3).

If no time code to be output is detected, normal MD reproduction is performed. When the time code to be output is detected, the start and end time codes Ta, T of each track are stored in the memory of the system controller 3.
b, the total time T of each track and the identification character are stored (S
4) Set to the reproduction standby state. At this time, the system controller 3 that has read the UTOC information displays the recorded contents such as the table of contents information and the type of the time code on the display 14.

Next, a track to be reproduced is inputted by the key 15 and a track to be reproduced is designated (S5). When the system controller 3 specifies a track to be reproduced,
The optical pickup 7 is moved to the position of the head of the designated track, the information recorded on the track is read out to the DRAM 12, and the type of the time code is determined from the identification character, and the calculation to be output in accordance with the time code format is performed by the time code conversion. Starting at the processor 16-3, the time code Ta added to the head of the reproduction signal is stored in the latch circuit 16-3.
5 and the time code output terminal 22 as the original time code input by the time code modulation circuit 16-2.
(S6).

The output time code is synchronized with a reference time recorded by a VTR or the like, and is output from the time code input terminal 21.
, And the reproduced signal is read out from the DRAM 12 and output to perform the reproducing operation.

When the reproduction start key of the key 15 is pressed or a signal for instructing reproduction is input from another device to the time code input terminal 21 (S7), the system controller 3 sends the start of the track from the DRAM 12 to the beginning of the track. The data is transferred to the ATRAC encoder via the anti-vibration memory controller 11.
The compressed data is expanded by sending it to the decoder 13 and a digital signal is output from the analog signal output or the output terminal 20 via the DA converter 18 (S8).

When the reproduction is started, a time-axis-compressed signal is read from the mini disc 1 in accordance with the TOC information based on the time base t of the MD reference clock, and the EFM is read.
Time axis expansion, data correction and the like are performed by the CIRC encoder / decoder and stored in the DRAM 12. The time code is calculated from the time code Ta at the head of the track, the time code Tb at the end of the track indicating the end of the track, and the total time T of the track according to the operation coefficient stored in the time code conversion processor 16-3. t is calculated, and the time code during playback is calculated every moment (S
9).

The time code conversion processor 16-3 includes:
The time code is converted for each frame or for each predetermined time according to the type of the time code, and the time code is output from the time code output terminal 22. The output time code is displayed on the display unit 14, and a bar graph or the like indicates which position of the track is being reproduced (S10).

When the reproduction of the designated track is completed, the apparatus enters a standby state, and waits for the designated reproduction track. When the stop key of the key 15 is pressed (S11), the time code at the stop position is calculated and output from the time code output terminal 22 (S12).

According to the present embodiment, the data signal recording / reproducing operation with another device having a time code can be calculated and output in accordance with the original time code. Can be.

When the track is connected by cutting data in the middle of the track at the time of editing, the cut TOC information is stored in the UTOC area, and the time calculated by subtracting the time cut according to the format from the total time T of the track is calculated. Can be.

[0058]

According to the present invention, the time code at the head of the track or at the head and end of the track required for calculating the time code is recorded. Therefore, the time code is calculated based on the time code at the time of reproduction and conforms to the format of the input time code. To output the time code.

[Brief description of the drawings]

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

FIG. 2 is a block diagram for explaining main parts.

FIG. 3 is a conceptual diagram of a data configuration of a UTOC name information storage sector.

FIG. 4 is a conceptual diagram of a data configuration of a time code information storage sector of UTOC.

FIG. 5 is a flowchart at the time of recording.

FIG. 6 is a flowchart at the time of reproduction.

[Explanation of symbols]

 Reference Signs List 1 mini disk 2 cartridge 3 system controller 4 servo control circuit 5 spindle motor 6 feed motor 7 optical pickup 8 RF amplifier 9 address decoder 10 EFMCIRC encoder / decoder 11 anti-vibration memory controller 12 DRAM 13 ATRAC encoder / decoder 14 display 15 key 16 time Code conversion circuit 17 AD converter 18 DA converter 19 Input terminal 20 Output terminal 21 Time code input terminal 22 Time code output terminal 23 Head drive circuit 24 Recording head

Claims (15)

[Claims] 1. A means for demodulating an input signal to obtain a time code, and a time code for latching the time code at the start of a track at which recording of the input signal is started or a track to be recorded is switched Latch means, and U of a track on which the input signal is recorded.
An optical disc device comprising means for recording the time code in a TOC area. 2. A means for obtaining a time code of an input signal, and a time code latch means for latching the time code at the start of a track at which recording of the input signal is started or a track to be recorded is switched. And the UTO of the track on which the input signal is recorded.
An optical disk device comprising means for recording the time code in the area C. 3. A means for demodulating an input signal to obtain a time code, and latching the time code at the start and end timings of a track at which recording of the input signal is started or a track to be recorded is switched. An optical disc device comprising: time code latch means; and means for recording the time code in a UTOC area of a track on which the input signal is recorded. 4. A means for demodulating an input signal to obtain a time code, detecting the time code at the beginning of a track at which recording of the input signal is started or a track number is switched, and detecting the time code. Time code latch means for latching, detecting the time code of the end timing of the track before the recording of the input signal is completed or the track number is switched, and latching the time code; An optical disc apparatus comprising: means for recording a time code of recording start and end of a track in a UTOC area of the recorded track. 5. A recording means for compressing an input signal, temporarily storing the compressed signal in a memory via an anti-vibration memory controller, and recording the signal read from the memory on an optical disk via an EFMCIRC encoder. Means for demodulating a signal to obtain a time code; time code latch means for latching the time code at the beginning of a track at which recording of the input signal is started or a track number is switched by the recording means; An optical disc device comprising means for recording the time code in a UTOC area of a track on which an input signal is recorded. 6. A recording means for compressing an input signal, temporarily storing the compressed signal in a memory via an anti-vibration memory controller, and recording the signal read from the memory on an optical disk via an EFMCIRC encoder. Means for demodulating a signal to obtain a time code; and time code latch means for latching the time code at the beginning and end of the track at which recording of the input signal is started or the track number is switched by the recording means. ,
An optical disk device comprising: a unit for adding and recording the time code to a UTOC area of a track on which the input signal is recorded. 7. A time code demodulator for demodulating a time code signal of an input signal, time code type discriminating means for detecting and discriminating the type of the time code, and demodulated by the time code demodulator. Time code latching means for latching the time code at the start of recording of the input signal or at the beginning of the track at which the track is switched; and storing the time code in the UTOC area of the track at which the input signal is recorded. An optical disc device comprising means for recording. 8. The optical disk device according to claim 1, further comprising recording means for recording time code information in a track name recording area of the UTOC. 9. A system according to claim 1, further comprising a discriminating means for discriminating the type of the time code from the input signal, and a recording means for adding an identification signal indicating the discriminated type of the time code to the time code for recording. An optical disc device according to any one of the above. 10. The optical disk according to claim 1, wherein a signal for identifying a time code and an identification signal for identifying a type of the time code are added to the time code when recording the time code and recorded. apparatus. 11. An optical disk having a UTOC area having an area for recording time code information of a head of a recorded track or a head and an end of a track and an area for recording a signal for identifying a type of the time code. . 12. A device for reproducing an optical disk, detecting a recording start time code Ta and a type of time code of a track included in the UTOC area, and outputting a time code based on the detected time code Ta. An optical disc device characterized by the above-mentioned. 13. A means for detecting a recording start time code Ta, a recording end time code Tb, and a type of time code of a track recorded on the UTOC area by reproducing an optical disk, and the detected time codes Ta and T
b. An optical disc device comprising a conversion means for converting the type of time code and the type of time code into an original time code signal. 14. A means for reading a signal recorded in the UTOC of an MD, detecting a time code signal and recognizing the recorded time code and type, and a time code of a head of a track of the recognized time code. Ta and time code Tb at the end of the track
Means for calculating a time code of {Ta + (Tb−Ta) / T × t} according to the output signal of the track which is corrected by the actual time length T of the track and the time t by the operation clock of the MD and reproduced, An optical disc device comprising a modulating means for modulating and outputting a time code signal in accordance with a code type. 15. A means for reading a signal recorded in the UTOC of the MD, detecting a time code signal and recognizing the recorded time code and type, and a time code for the head of the recognized time code track. Ta and time code Tb at the end of the track
Calculating means for correcting the actual time length T of the track and the time t according to the operation clock of the MD, and converting the time code of {Ta + (Tb−Ta) / T × t} according to the output signal of the track to be reproduced; An optical disc device comprising: means for calculating the time code at the beginning and end of each divided track when dividing and editing the track by the conversion means and recording the time code in the UTOC area.