JPH0729180A - Information recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Structure] An operation unit for inputting a main information recording instruction and a main information reproducing instruction to a magneto-optical disk, and information compression based on a main information recording instruction (S0) input from the operation unit. The processing circuit starts writing main information in the first buffer memory (S3), and the recording data processing circuit intermittently records main information in the magneto-optical disk.
In parallel with the intermittent recording on the magneto-optical disc by the recording data processing circuit, the main information reproduction instruction (S8) in which the contents already recorded on the magneto-optical disc are input from the operation unit
And a controller for causing the reproduction data processing circuit to intermittently read out the main information from the magneto-optical disk, and for causing the reproduction data processing circuit to externally output the main information in the second buffer memory 14. . [Effect] Even during recording, it is possible to immediately reproduce the already recorded contents.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus using a recording medium capable of arbitrarily recording a digitized audio signal or the like, for example, a recordable optical disk.

[0002]

2. Description of the Related Art Conventionally, a compact disc (hereinafter referred to as "CD") in which continuous information such as music information is recorded as a digital signal by fine pits which can be optically detected has been widely used. The CD is reproduced by a CD player as a reproduction-only optical disk reproducing device.

As shown in FIG. 12, the signal format used in the CD is such that one frame 101a of the recording signal is
It is composed of a frame synchronization signal 101b indicating the beginning of a frame, a subcode 101c indicating additional information of data, and a data field 101d in which error detection and correction parity code is added to 24 bytes of data which is main information. ing. The data field 101
d is CIRC (Cross Interleaved Reed Solomon Code)
)) Is composed of an error detection and correction method that combines non-complete interleave.

As shown in FIG. 13, the sub-code 101c is composed of 98 frames 101a, forms one sub-coding frame 102c (hereinafter referred to as "sector"), and has a track number (main information is music information). In this case, it is called a song number) and absolute address information on the disc is shown. Since the sector length is (1/75) seconds, it becomes 1 second for 75 sectors, and the sector number is minutes: seconds: frame information (frame is a 75-ary),
The time information and the position information are continuously increasing from the innermost circumference of the disc. Further, the data field 102d in the sector has 2352 with a 98 frame structure.
It consists of bytes of main data and 784 bytes of parity, and a CD if audio information is placed in the main data.
According to the format, the sampling frequency is 44.1kHz,
Since the quantization is a 16-bit straight line and the number of channels is 2 (stereo), the number of data per second is (44.1 kHz × 16 × 2) = 1.4112 Mbits = 176.4 kbytes, The number of data per sector is (176.4 kbytes / 75) = 2352 bytes, which is allocated as the main data.

As shown in FIG. 11, the area arrangement of the disc 100a in the CD is divided into a main information recording area 100c containing main information such as music information and a sector number by the subcode, and a main information recording area 100c. Subcode indicates additional information related to each recorded main information, for example, each track number and recording start sector number of each track, and information for identifying whether the track is audio information such as music or computer data. It is composed of a TOC (Table Of Contents) area 100b.

In the CD player, due to the above format, when the disc is loaded, the TOC area 100 is loaded.
By reading the subcode information of b, the number of each main information (corresponding to the number of songs in the case of music information), the sector number of the recording start position, and the type of information (audio or data) are recognized. The reproduction of a desired track in response to the reproduction instruction is performed by promptly performing an access operation by collating the information of the TOC area 100b with the sector number of the sub code of the main information recording area 100c.

Since these CDs are recorded by a so-called CLV (Constant Linear Velocity) method at the time of recording, the recording density is constant at any position on the disk, and the recording capacity is improved. Actual cd
In the player, CLV with the above signal format
The CLV control is executed by controlling the rotation of the disc so that the interval of the recorded reproduction signal of the CD, for example, the frame synchronization signal becomes the reference length.

On the other hand, when recording and using various information such as music information and computer information on a rewritable type disc such as a magneto-optical disc which has been developed in recent years,
It is desirable to provide a compatible disc recording / reproducing apparatus that has a common reproducing system with that of a conventional CD.

In this case, particularly in the initial disc on which no information is recorded, absolute address information and CLV using the subcode according to the signal format of the CD are used.
Since there is no frame synchronization signal or the like used for control, the access operation to an arbitrary sector position prior to recording and the required CLV control during recording cannot be performed.
Therefore, as an absolute address recording method equivalent to the absolute address information by the subcode, after the absolute address is biphase-mark modulated, the guide groove of the optical disk is set in the radial direction of the disk according to whether each bit is "1" or "0". It has been proposed that the guide groove is biased inward or outward or the width of the guide groove is changed (JP-A-64-39632).
Issue). In that case, the frequency band of absolute address by byte phase mark modulation and EFM (Eight to Four)
teen Modulation) If it is different from the frequency band of the recorded information by modulation, both can be reproduced separately from each other, and the above absolute address using the guide groove is used even for the area without recorded information. Access operation is possible. Also, with regard to CLV control, accurate CLV control can be performed by using the reproduced carrier component of the absolute address, and can be similarly performed during recording.

[0010]

However, in the conventional information recording / reproducing apparatus using the above-mentioned rewritable disc, recording is performed similarly to a tape recorder using a compact cassette which is a general consumer information recording / reproducing apparatus. Since the inside is dedicated to the recording function, if you want to play back the recorded contents, you can only play back after the recording is finished, and you can not play back the contents recorded up to that point during recording. For example, when the user wants to listen to the FM broadcast program from 7 pm to 8 pm but cannot listen at that time because he / she is not at home at that time, he can make a timer reservation to record and later listen to it. If you come home at 15:
The FM broadcast program after returning home will be listened to in the middle, and if it is desired to listen from the beginning of 7:00 pm, it cannot be heard until after 8:00 pm when the recording is finished.

Further, for example, in the case where the listening is interrupted due to a visitor when listening to the FM broadcast, the recording may be started at that point in order not to miss the broadcast contents during the interruption.
When the customer's business ends in a short time and continues to listen again, it is not possible to immediately listen to the broadcast contents during the interruption, so after all it is necessary to finish recording until the end of the program you want to listen to. For example, continuous listening cannot be performed even during the interruption.

The present invention has been made in view of the above conventional problems, and an object thereof is to be able to immediately reproduce the already recorded contents even during recording.
Consequently, it is to provide an information recording / reproducing apparatus capable of improving operability.

[0013]

In order to solve the above-mentioned problems, the information recording / reproducing device of the present invention is an information recording / reproducing device which uses a recording medium in which absolute address information is preformed. Main information entered from the first
First recording means for sequentially storing in the first memory means at a transfer rate, and main information stored in the first memory means is read out at a second transfer rate faster than the first transfer rate and is intermittently recorded on a recording medium in block units. A second recording means for recording the main information on the recording medium, a first reproducing means for intermittently reading the main information on the recording medium in block units, and storing the main information in the second memory means at a second transfer speed;
Second reproducing means for sequentially reading out the main information stored in the memory means at the first transfer rate and externally outputting it, first input means for inputting a main information recording instruction to the recording medium, and Second input means for inputting a main information reproduction instruction, and start writing main information into the first memory means by the first recording means based on the main information recording instruction input from the first input means, and While recording the main information on the recording medium by the second recording device is intermittently performed,
In parallel with the intermittent recording on the recording medium by the recording means,
Based on the main information reproducing instruction input from the second input unit, the first information is intermittently read from the recording medium based on the content already recorded in the recording medium, and the second information is recorded.
A control means for causing the reproduction means to output the main information from the second memory means to the outside is provided.

In order to solve the above-mentioned problems, an information recording / reproducing apparatus according to a second aspect of the present invention is the information recording / reproducing apparatus according to the first aspect, wherein the first input means has a preset recording start. It is characterized in that a timer means for instructing the start of recording according to the time is provided.

In order to solve the above-mentioned problems, an information recording / reproducing apparatus according to a third aspect of the present invention is the information recording / reproducing apparatus according to the first aspect, in which the reproduction start time is instructed to the second input means. And a calculation means for calculating the reproduction start absolute address value of the corresponding recording medium corresponding to the instructed time.

In order to solve the above-mentioned problems, an information recording / reproducing apparatus according to a fourth aspect of the present invention is the information recording / reproducing apparatus according to the first aspect, wherein the first input means is externally input together with main information. It is characterized in that an external information input means for instructing recording of main information on the recording medium based on the recording instruction information is provided.

In order to solve the above-mentioned problems, an information recording / reproducing apparatus according to a fifth aspect of the present invention is the information recording / reproducing apparatus according to the first aspect, wherein the control means has a first area within a predetermined area on the recording medium. It is characterized in that a repeating means for sequentially repeating the recording by the two recording means and the reproduction by the first reproducing means is provided.

[0018]

According to the first aspect of the invention, the control means sets the first information recording instruction based on the main information recording instruction input from the first input means.
Main information inputted from the outside by the recording means is sequentially stored in the first memory means at the first transfer speed, and the main information stored in the first memory means by the second recording means is stored at the first transfer speed or less. Also, the data is read out at a high second transfer rate and is recorded intermittently on the recording medium in block units. Further, the control means, in parallel with the intermittent recording on the recording medium by the second recording means, based on the main information reproducing instruction inputted from the second input means, the contents already recorded on the recording medium. , The first reproducing means intermittently reads out the main information on the recording medium in block units and records it in the second memory means at the second transfer speed, and the second reproducing means stores it in the second memory means. The read main information is sequentially read at the first transfer rate and output to the outside.

As a result, it becomes possible to immediately reproduce the already recorded contents even during recording.

According to the structure of claim 2, since the first input means is provided with the recording time instructing means for instructing the recording start according to the preset recording start time, the predetermined recording start time is set. The recording time instructing means automatically gives an instruction to start recording according to the recording start time without inputting by the first input means. Thereby, operability can be improved.

According to the structure of claim 3, since the second input means is provided with the reproduction time instructing means for instructing the reproduction start time, the reproduction is automatically performed at the predetermined time. It becomes possible to do. Further, at the time of reproduction, the calculation means obtains the reproduction start absolute address value of the corresponding recording medium corresponding to the instructed time, so that it becomes possible to reproduce the information corresponding to the desired time. Thereby, operability can be improved.

According to the structure of claim 4, the first input means is provided with the external information input means for giving the main information recording instruction to the recording medium based on the recording instruction information inputted together with the main information from the outside. Therefore, by including the main information input from the outside with the main information recording instruction to the recording medium without directly inputting it,
It is possible to automatically instruct the recording of the main information on the recording medium and thereby record the information on the recording medium. Thereby, operability can be improved.

According to the structure of claim 5, the control means is provided with a repeating means for sequentially repeating the recording by the second recording means and the reproduction by the first reproducing means within a predetermined area on the recording medium. Therefore, desired information can be sequentially recorded and reproduced. Thereby, operability can be improved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.
It will be described below based on 0. In this embodiment, for example, a disc recording / reproducing apparatus using a rewritable disc will be described.

A magneto-optical disk 1 as a rewritable optical disk used in the information recording / reproducing apparatus of this embodiment.
As shown in FIG. 2, a TOC (Table Of Contents) area 1a, which is a management information area, is provided at the end on the inner peripheral side, and most of the area outside the TOC area 1a is the main information area 1b. Has become. Music information is recorded in the main information area 1b, while the main information area 1 is recorded in the TOC area 1a.
Additional information relating to each information recorded in b, such as the song number of each song, the start absolute address position and the end absolute address position, is recorded.

The signal format used here can be the same as that of FIGS. 12 and 13 used in the description of the conventional example.

In the TOC area 1a and the main information area 1b of the magneto-optical disk 1, spiral guide grooves 2 are formed in advance at predetermined intervals in the disk radial direction, as shown by hatching in FIG. 3 for convenience. Has been done. Then, the absolute address on the magneto-optical disk 1 is set in the radial direction of the magneto-optical disk 1 depending on whether it is "1" or "0" after the biphase mark modulation. It is biased inward or outward. The absolute address represents a position on the magneto-optical disk 1 and serves as prerecorded information as rotation control information of CLV (Constant Linear Velocity). Since the absolute address here corresponds to one sector in the CD format, it will be referred to as a sector hereinafter.

The format used for the magneto-optical disk 1 will be described with reference to FIGS. In addition,
This format is based on the formats shown in FIGS. 12 and 13 described in the conventional example.

The format shown in FIG. 4 shows the format of the main data portion of 2352 bytes in the sector structure shown in FIG. 13, and the main data field 103a is for identifying the beginning of the sector. Sector synchronization signal 103b, sector address 103c indicating the address of each sector, and user data 103d
It is composed of The sector address has, for example, the same value as the absolute address information previously recorded on the magneto-optical disk 1.

These byte structures are stored in the CD-ROM (C
By applying the example of "Ompact Disc-Read Only Memory", 12 bytes can be assigned to the sector synchronization signal 103b and 4 bytes (called a header in the CD-ROM) can be assigned to the sector address 103c.

Therefore, (2352-12-4) = 2336 bytes can be used as user data per sector.

The format of the block structure used to enable rewriting of information in this embodiment is, as shown in FIG. 5, a block 1 which is the minimum unit of recording / reproducing operation.
04a indicates sector 0 (104b) to sector 14 (1
04p) consists of 15 sectors in total. Of these, sector 0 (104b) and sector 1 (104c)
Sector 13 (104o) and sector 14 (104
p) is a sector group added for rewriting in block units. That is, when information is rewritten using the CD signal format as described above, the information of the target sector position is actually obtained by the non-interleaved interleave by the CIRC.
This is done because it is difficult to rewrite only the desired sector because it is distributed to the front and rear sectors above (for details, see JP-B-64-55787).
Please refer to it because it is also explained in the Gazette etc.).

According to the CD format, all the recorded information is continuous, but if rewriting is performed, many data errors occur at the recording start point and the recording end point, and the original correction capability of CIRC is realized. In this case, the code propagation length by non-complete interleaving requires 105 frames. Therefore, it is desirable to provide 1.07 or more, ie, two additional sectors before and after the sector composed of 98 frames. The additional sector at the front is the PLL (Phase L
It is also required as a pull-in area for ocked Loop). Therefore, in the block 104a, two additional sectors are allocated before and after the sector group in which the user data is arranged among the 15 sectors, and the data block 105 includes the sector 2 (104d) to the sector 12 ( It is arranged in 11 sectors of 104n), and (2336 × 11≈25.7 kbytes≈206 kbits) is given.

Further, FIG. 6 shows the arrangement of the blocks used for the actual music information. The program 106a corresponding to one music piece is composed of consecutive blocks such as block B0 (106b) to block Bn (106n). It indicates that it is composed of a set.

Next, the components of the information recording / reproducing apparatus of this embodiment will be described with reference to the block diagram of FIG.

As shown in FIG. 9, the information recording / reproducing apparatus of the present embodiment irradiates the magneto-optical disk 1 with a spindle motor 4 for supporting and rotating the magneto-optical disk 1 and irradiating the magneto-optical disk 1 with a laser beam during recording and reproduction. And a coil 24 for applying a magnetic field to the magneto-optical disk 1 at the time of recording. The information recording / reproducing apparatus of the present embodiment is configured to perform recording by the so-called magnetic field modulation method, and is capable of performing overwrite by recording new information on recorded information.

First, each component of the recording system will be described along the basic information recording operation. The analog information input from the input terminal 18 is converted into a digital signal by the A / D (analog / digital) converter 19. After that, it is supplied to the information compression processing circuit 20.

The information compression processing circuit 20 is a portion for performing compression processing on digital audio information continuously input from the A / D converter 19 using a predetermined algorithm, sampling frequency = 44.1 kHz, quantization. 128 kbps per channel of audio information of bit number = 16 bits (2 channels are handled here, so 2
56 kbps).

That is, (44.1 kHz × 16 × 2≈
Since the information of 1.41 Mbps) is compressed into the information of 256 kbps, (256 k / 1.41 M≈1 /
A compression rate of 5.5) will be obtained.

Regarding a concrete method, for example, Shinji Hayashi, "Sound Coding Algorithms and Standardization Trends"
Vol.89, No.434, pp.17-22), etc., various methods can be used, but the description is omitted here because it is not limited to the contents.

In the information compression processing circuit 20, in addition to the compression processing, according to the main data format in the sector shown in FIG. 4, the user data 103d which is digital music information, the sector synchronization signal 103b, and the controller 10 are used. Given sector address 103
After c is added for each sector, the additional sector shown in FIG. 5 is generated and is temporarily written in the first buffer memory 21 as the first memory means together with the compressed audio information as a compressed audio block. This process is the first
It has a function as a recording means.

Next, the compressed audio block is read from the first buffer memory 21 and sent to the recording data processing circuit 22 at a required timing according to an instruction from the controller 10.

In the recording data processing circuit 22, the compressed audio block from the first buffer memory 21 is subjected to CIR.
The error detection / correction parity is generated and added by C, the subcode information from the controller 10 is added, and after this is EFM-modulated, a frame synchronization signal is further added and supplied to the coil driver 23.

The coil driver 23 drives the coil 24 based on the supplied signal, and at the same time, the optical head 3
A signal is recorded by irradiating the magneto-optical disk 1 with laser light. Therefore, the recording data processing circuit 22, the coil driver 23, the coil 24, the optical head 3 and the controller 10 are used as the second unit.
Recording means is configured.

Next, the reproducing system will be explained. The signal read by the optical head 3 is amplified by the reproducing amplifier 5 and the signal is read by the reproducing amplifier 5.
The binarized magneto-optical signal Ps is supplied to the reproduction data processing circuit 9. The optical head 3, the reproduction amplifier 5, and the reproduction data processing circuit 9 constitute a first reproduction means.
The reproduction signal amplified by the reproduction amplifier 5 is sent to the prerecorded information detection circuit 6. The prerecorded information detection circuit 6 is
For example, band pass filter and PLL (Phase Locked Loo)
p), the PLL generates a clock synchronized with the prerecorded information in the reproduced signal extracted by the bandpass filter. Then, the CLV control circuit 7 is supplied with a clock synchronized with the prerecorded information, which is formed by bi-phase mark modulation of absolute address information.

A CLV (Constant Linear Velocity) control circuit 7 compares the synchronous clock from the prerecorded information detection circuit 6 with a reference frequency held internally, and controls the spindle motor 4 by the difference signal. Accurate CLV control is implemented. Further, the pre-recorded information in the reproduction signal extracted by the pre-recorded information detection circuit 6 is supplied to the absolute address detection circuit 8.

The absolute address detection circuit 8 is composed of a bi-phase mark demodulation circuit and an address decoder. After the pre-recorded information extracted by the pre-recorded information detection circuit 6 is subjected to bi-phase mark demodulation, the address decoder detects the position on the disc. The information, that is, the absolute address value which is the sector number, is decoded and supplied to the controller 10.

The reproduction data processing circuit 9 separates the frame sync signal from the binarized magneto-optical signal Ps in the reproduction signal supplied from the reproduction amplifier 5 and EFM (Eight to Fourteen).
Modulation) Demodulation is performed to separate the subcode information to be sent to the controller 10, and an error correction operation by CIRC using the parity of the reproduced data is performed.
The reproduction data error-corrected by the reproduction data processing circuit 9 is stored in the controller 1 as a compressed audio block.
After being once written to the second buffer memory 14 as the second memory means by the instruction of 0, the controller 10
Is read out according to the instruction, and is supplied to the information expansion processing circuit 15 as the second reproducing means. The information decompression processing circuit 15 extracts the sector address information from the compressed audio block read from the second buffer memory 14 and supplies the sector address information to the controller 10, and at the same time, performs a predetermined decompression operation on the compressed audio data (the reverse of the compression processing). By performing decompression processing and sequentially supplying it to the D / A (digital / analog) converter 16, the audio information restored to analog is reproduced and output from the terminal 17.

The controller 10 receives a user's recording / playback instruction and the like via the operation unit 13 as the first input means and the second input means, and displays the song number, time information, etc. relating to the recording / playback on the display unit 12. It is designed to be displayed sequentially. Further, the position of the optical head 3 on the magneto-optical disk 1 is recognized by receiving the sector value from the absolute address detection circuit 8, that is, the absolute address information, and the optical head 3 is moved to a desired position by using an optical head moving mechanism (not shown). It has an access function to move to a position. Further, the subcode information given from the reproduction data processing circuit 9 is recognized, and when the recognized subcode is the content of the TOC area, it is stored in the TOC memory 11 as management information, and if necessary, the TOC memory 11 is stored. The management information is read from.

Further, at the time of recording, the information compression processing circuit 20
On the other hand, while supplying the sector address corresponding to the absolute address information, the main information recorded, that is, the absolute address information of the music information here is stored in the TOC memory 11, and the contents of the TOC memory 11 are stored as necessary. By supplying the subcode information to the recording data processing circuit 22, the management information is registered in the TOC area 1a of the magneto-optical disk 1.

As a control means, the controller 10 instructs and executes writing and reading of the compressed audio block to and from the first buffer memory 21 and the second buffer memory 14.

Next, the case where the recording and reproducing operations are independently performed will be described below with reference to the schematic timing charts of FIGS. 7 and 8 and the block diagram of FIG. Here, FIG. 7 describes only at the time of recording (when recording only and not reproducing), and FIG. 7A shows input information of the information compression processing circuit 20 (digital audio information sequence before compression). ), FIG. 7 (b)
Is a compressed audio block (audio information sequence after compression) output from the information compression processing circuit 20 and written in the first buffer memory 21, and FIG. 7C is a recording data processing circuit read from the first buffer memory 21. 22
The relationship of each compressed audio block (compressed audio block to be recorded) output to is shown. Note that FIG.
The hatched portions shown in (b) and (c) indicate sections where there is no information transfer.

At the time of recording, first, as shown in FIG. 9, the analog audio information input from the terminal 18 is input as continuous information, and the A / D converter 19
Is converted into 1.41 Mbps digital audio information. That is, as shown in FIG. 7A, blocks A0 (107a), A1 (107b), and A2 (1
07c) ... Each of them is audio information corresponding to about 0.8 seconds, and the amount of information is (44.1 kHz × 16 bits × 2 channels × 0.8).
Seconds = 1.12896 Mbits = 141.12 Kbytes). These pre-compression information strings are compressed to about 1 / 5.5 by the information compression processing circuit 20, so that compressed audio information of (141.12 kbytes / 5.5) ≈25.66 kbytes is obtained. Further, the sector synchronization signal and sector address information shown in FIG. 4 and the additional sector group shown in FIG. 5 are added, and as shown in FIG. 7B, there is a slight processing time delay from the time tw0. Accordingly, from time tw1, the compressed audio block B0 (1
08b) .B1 (108c) .B2 (108d) ... Are sequentially written in the first buffer memory 21.

In the compressed audio block shown in FIG. 7B, the sector synchronization signal (1) is added to the compressed audio information (25.66 kbytes) per block.
2 bytes x 15 sectors) and sector address information (4
The total capacity of the block is 25.66k + (12 × 15) + (4 × 15) + (23
36 bytes × 4) ≈35.2 kbytes, and the write transfer rate as the first transfer rate to the first buffer memory 21 is ((35.2 kbyte × 8 bits) /0.8 seconds) ≈35.
It is 2.4 kbps.

On the other hand, the compressed audio block written in the first buffer memory 21 is, as shown in FIG. 7C, the first buffer memory 21 of the compressed audio block.
To the compressed audio blocks B0 (109b) and B1 (109) every time tw2, tw4 ...
By reading d) ... From the first buffer memory 21 and outputting it to the recording data processing circuit 22, recording is performed with the series of operations.

The memory read speed (corresponding to the transfer speed of recorded information) as the second transfer speed in FIG. 7C is 1.41 Mbps, which is the same as that of the conventional CD, and is the same as the above memory write transfer speed. By comparison, (1.41 Mbps / 352.4 kbps) ≈4 times. This relationship is represented by the compressed audio blocks B0 (109b) and B1 (109) on the magneto-optical disk 1.
d) ... is composed of 15 sectors each, and the time per sector is (1/75) seconds as described above, so (1/75) × 15 = 0.2 seconds, and Previous audio block A0 (1
07a) · A1 (107b) · A2 (107c) ... Comparing with 0.8 seconds, which is the occupied time, (0.8 / 0.2) = 4 times, which is equal to the transfer speed ratio. Match.

Therefore, the actual recording operation is carried out in 1/4 of the compressed audio block time of one block, and the remaining 3/4 of the time is in the standby state. By repeating, the continuous audio information inputted externally is recorded.

Next, FIG. 8 shows reproduction (only for reproduction,
FIG. 8A shows the operation when recording is not performed).
Is a compressed audio block reproduced from the magneto-optical disk 1 and written in the second buffer memory 14 by the reproduction data processing circuit 9. FIG. 8B shows an information decompression processing circuit 15 read from the second buffer memory 14. 8C shows the relationship between each of the compressed audio blocks supplied to FIG. 8C and the expanded audio information string output from the information expansion processing circuit 15. In addition, FIG.
In (c), the hatched portion indicates a section where there is no information transfer.

At the time of reproduction, first, at times tr0 to tr3, as shown in FIG. 8A, the compressed audio blocks B0 (110a) to B3 (110d) are suddenly changed to the second position.
After writing to the buffer memory 14, writing is interrupted. Here, the temporary suspension is performed because the capacity of the second buffer memory 14 is finite, and FIG. 8 shows a case where the buffer memory capacity is four blocks for convenience of explanation. Note that FIG.
The buffer memory write transfer rate as the second transfer rate shown in (a) is 1.41 Mb corresponding to the above recording time.
ps.

Further, in parallel, as shown in FIG. 8B, the compressed audio block B0 (110
Upon completion of the buffer memory writing in a), the read operation is started. The memory read transfer rate as the first transfer rate of the compressed audio block B0 (111b) here is 35 in correspondence with the above recording time.
It is 2.4 kbps.

Regarding the audio reproduction after decompressing the audio information, as shown in FIG. 8C, time tr1
This is performed by starting the audio output after expansion by the information expansion processing circuit 15 from time tr2 with a slight processing time delay.

On the other hand, when the time tr4 is reached, FIG.
When the reading of the compressed audio block B0 (111b) is completed, the second buffer memory 14
8A, the compressed audio block B4 (110f) is reproduced, that is, written in the second buffer memory 14, and the standby state is resumed. The ratio of the write transfer rate to the second buffer memory 14 and the read transfer rate is (1.41
Mbps / 352.4 kbps) ≈4 times.
Therefore, the actual reproduction operation is performed in 1/4 of the compressed audio block time of one block, and the remaining 3/4 time is in a standby state, and thereafter, similarly in the second buffer memory 14. By reading the compressed audio block from the magneto-optical disk 1 intermittently every time a space is created and writing the compressed audio block to the second buffer memory 14 to replenish it, continuous reproduction of audio information is performed without interruption.

Next, a simultaneous parallel operation of recording and reproduction based on the above-mentioned basic operations in the information recording / reproducing apparatus of this embodiment, that is, recording of information input from the outside and recording of An operation when information is reproduced in parallel will be described based on the flowchart of FIG. 1, the block diagram of FIG. 9, and the operation time chart of FIG.

Here, FIGS. 10 (a), 10 (b) and 10 (c) show the signal flow relating to the recording operation. FIG. 10 (a) shows the audio information input to the information compression processing circuit 20, and FIG.
0 (b) is a compressed audio block which is compressed in the information compression processing circuit 20 and then written in the first buffer memory 21, and FIG. 10 (c) is read from the first buffer memory 21 and supplied to the recording data processing circuit 22. Indicates a compressed audio block that is recorded, that is, recorded. Also,
10 (d), (e), and (f) show the signal flow relating to the reproducing operation, and FIG. 10 (d) shows the reproduction from the magneto-optical disk 1 to the second buffer memory 14 from the reproduction data processing circuit 9. Compressed audio block written, Figure 1
0 (e) shows a compressed audio block read from the second buffer memory 14 and sent to the information expansion processing circuit 15, and FIG. 10 (f) shows audio information expanded by the information expansion processing circuit 15 and output. Note that, for convenience of description, FIG. 10 shows a case where a recording start instruction is given from time t0 and a reproduction start instruction is given at time t2. As an operation, the reproduction from the recording start position is performed about 5 seconds after the start of recording. The description will be given by taking an example of a case where it is performed, that is, a case where audio information input by recording is reproduced with a delay of about 5 seconds.

The processing time delay of the information compression processing circuit 20 and the information decompression processing circuit 15 shown in FIGS. 7 and 8 will be omitted here, and the first buffer memory 21 and the second buffer memory 14 will be described. Assumes that it has a capacity to store at least 5 compressed audio blocks. Further, it is assumed that a recording operation is started by a user's recording instruction and a desired reproduction is performed in parallel with the recording by a reproduction instruction during the recording operation.

As shown in FIG. 1, when a recording instruction from the user is given from the operation unit 13 and is instructed to the controller 10 (S0), the controller 10 first plays the play identification information indicating the reproduction operation. The reproduction operation is stopped by setting the flag to "0" (S1), and the recording block corresponding recording address Ar is, for example, the address corresponding to the innermost circumference of the main information area 1b of the magneto-optical disk 1 [00: 0].
0 second 00 frame] (S2). The recording address Ar and the reproduction address Ap described later indicate the head absolute address of each compressed audio block to be recorded and reproduced.

Next, the start of writing the external information to the first buffer memory 21 is instructed (S3), and the recording address Ar position, that is, the disk innermost circumference address [0
0 min 00 sec 00 frame] is accessed (S4), then it is determined whether or not the writing of the compressed audio blocks of 4 blocks to the first buffer memory 21 is completed (S5), and 4 blocks. It is repeated until the compressed audio data of is aligned in the first buffer memory 21. When the end determination is made, the first buffer memory 21
Then, the compressed audio blocks for four blocks are read out and supplied to the recording data processing circuit 22 so that recording on the magneto-optical disk 1 is carried out (S6).

Corresponding the above procedure to FIG. 10, after setting S0 to S3 from time t0, the operation of accessing the recording address Ar corresponding to the recording block by S4 is performed, as shown in FIG. As described above, the compressed audio block writing to the first buffer memory 21 is 4 blocks RB0 (b0) .RB1 (b1) .RB2 (b2) .R.
From the time point t1 when B3 (b3) is completed, as shown in FIG. 10C, the compressed audio blocks RB0 (c0), RB1 (c1), and RB2 are read from the first buffer memory 21.
(C2) .RB3 (c3) is read and recorded at the corresponding position on the magneto-optical disk 1, and time t2 is reached. In addition, in the first buffer memory 21 in S5, 4
The block write completion determination can be made based on the relationship of sector address information that the controller 10 sequentially gives to the information compression processing circuit 20 for each sector.

Then, as shown in FIG. 1, the corresponding recording address Ar of the compressed audio block to be recorded next is updated (S7). Here, since 4 blocks have been recorded in S6, 4 blocks have been recorded for the current recording address Ar value.
An address value obtained by adding blocks, that is, (15 × 4) = 60 sectors, [00 minutes 00 seconds 00 frames]
Are added to 60 sectors, and [00:00:60 frame] becomes the updated recording block-corresponding recording address Ar.

Next, it is determined whether or not there is a reproduction start instruction from the operation unit 13 (S8), and if there is no reproduction start instruction, S1
On the other hand, if there is a reproduction start instruction while moving to 1, the reproduction block corresponding reproduction address Ap is obtained (S9). The reproduction address Ap is set to the address at which recording is started if a normal reproduction instruction is given. If the above example is applied, [0
0 minutes 00 seconds 00 frame]. Also,
If the reproduction start instruction is a reproduction instruction for designating the time from the operation unit 13 as the reproduction time processing means, it is calculated by the controller 10 as the calculation means from the content of the instruction. For example, when there is a playback instruction 15 minutes ahead of the recording start time, in this embodiment, the time corresponding to one block of audio is 0.8 seconds, so that in 15 minutes (1
5 × 60) /0.8=1125 blocks, and when converted into the number of sectors, it is 1125 × 15 = 16875 sectors. Therefore, with respect to the recording start address [00 minutes 00 seconds 00 frames], the above 16875 As the address including the sector, [03:45:00 frame] (the frame of the address value is in the 75th base and the second in the 60th base) is obtained.

Next, after the play flag is set to "1" (S10), it is determined whether or not there is a reproduction interruption instruction from the operation unit 13 (S11).
After the y flag is set to "0" and the reading of the second buffer memory 14 is stopped (S12), the reproduction instruction state by the play flag is determined (S13). That is, the play flag is information for determining whether or not to perform reproduction, and when the reproduction start instruction is input from the operation unit 13, S
At 10, the play flag is set to "1", and when a reproduction interruption instruction is input, at S12 the play flag is set to "0".
Therefore, the designated state is determined.

In S13, the play flag is "1".
In the case of, it is the reproduction address corresponding to the reproduction block [0
0 min 00 sec 00 frame] position access operation is performed (S14), and it is determined whether the reading of the compressed audio block from the second buffer memory 14 has been completed for 4 blocks (S15), for 4 blocks. It is recognized by the read completion judgment that an empty area has occurred in the second buffer memory 14, but at the present time, the second buffer memory 1
4 has not been started yet (the second buffer memory 14 is in an empty state), the reproduction from the compressed audio block corresponding to the Ap position on the magneto-optical disk 1 is started, and the second buffer memory 14 is started. The desired audio information is written to the memory 14 (S16) and the reading of the second buffer memory 14 is started (S17), so that the desired audio information is recorded on the optical head 3, the reproduction amplifier 5, the reproduction data processing circuit 9, and the second buffer memory. Reproduction is started via 14, the information expansion processing circuit 15, the D / A converter 16, and the like. The determination of the read status of the second buffer memory 14 in S15 can be performed based on the sector address recognized by the information expansion processing circuit 15.

Next, it is determined that the writing of the compressed audio information into the second buffer memory 14 has been completed for 4 blocks (S18), and the corresponding reproduction address Ap of the compressed audio block to be reproduced next is updated (S1).
9). Since 4 blocks have already been reproduced here, 4 blocks corresponding to the current address Ap value, that is, 15 ×
4 = 60 added as an address value, 60 sectors added to [00 minutes 00 seconds 00 frames], [0
0 minutes 00 seconds 60 frames] becomes the updated reproduction block corresponding address Ap.

After that, it is judged whether or not the recording / playback end instruction is input from the operation unit 13 (S20), and if there is no end instruction, the process returns to S4 and the above operation is repeated, thereby performing the intermittent recording operation and playback operation. Simultaneous parallel recording and playback is performed by alternately performing.

When the above procedure is made to correspond to the time chart of FIG. 10, it shows the case where the reproduction start instruction is input from the operation unit 13 at the time t2, and there is no reproduction interruption instruction after S8 to S11. To reach S13 and play
When it is determined that the flag is "1", the access operation to the position [00 minutes 00 seconds 00 frame] which is the reproduction block corresponding address Ap is performed corresponding to S14, and S16 is performed.
From time t3, as shown in FIG. 10 (d),
Writing of the compressed audio block RB0 (d0) corresponding to the address Ap position from the magneto-optical disk 1 to the second buffer memory 14 is started, and corresponding to S17,
As shown in FIG. 10E, the second buffer memory 14
Read compressed audio block from block PB
0 (e0) is performed, and the audio information after decompression shown in FIG. 10 (f) is sequentially output from the output block PA0 (f0).

Then, at time t4 corresponding to S18, as shown in FIG.
Writing of four compressed audio blocks shown in 0 (d) is completed, that is, block PB0 (d0) · PB
When the end of writing 1 (d1) / PB2 (d2) / PB3 (d3) is recognized, the next recording operation corresponding to the steps S19, S20, and S4 to S7 is timed as shown in FIG. 10 (c). Compressed audio block RB4 from t5
(C4) / RB5 (c5) / RB6 (c6) / RB7
The reading operation from the first buffer memory 21 and the recording operation to the magneto-optical disk 1 in (c7) are performed, and thereafter, the intermittent reproducing operation and the recording operation are alternately performed.

On the other hand, when there is a reproduction interruption instruction from the operation unit 13 during the intermittent recording operation and reproduction operation according to the above contents, the judgment is made in S11, and the play flag is set to "0" in S12. "And the reading of the second buffer memory 14 is stopped, the intermittent reproduction operation is interrupted while the recording operation is being performed, and the reproduction from the interruption position is performed in the subsequent reproduction start instruction input stage. It will continue.

Further, the updating of the recording address Ar and the reproducing address Ap in S7 and S19 is performed in the main information area 100c on the magneto-optical disk 1 for recording / reproducing when the area exceeds the outermost peripheral position which is the area end, for example. By being set to the innermost circumferential position which is the start end, the controller 1 as a repeating unit until the recording operation (and the reproducing operation) is determined to be the recording stop instruction in S20.
0 is executed endlessly.

In the above operation example, S4 and S1
The access operation in 4 is, as is clear from FIG.
It is premised that the time is from t2 to t3, and from time t4 to t5, that is, in this operation example, it ends within 0.8 seconds which is the time required for one audio block before compression at worst, but the access performance When it is applied to a system with poor performance, it can be easily dealt with by increasing the storage capacity of the first buffer memory 21 and / or the second buffer memory 14.

In the above operation example, the case where the user's recording start instruction is given from the operation unit 13 as the recording start instruction has been described, but the operation unit 13 includes a timer device as recording time instruction means. By providing the recording start instruction from the timer device corresponding to the preset recording start time, the convenience is increased. Further, in the case of an information recording / reproducing apparatus having a built-in FM tuner and the like, a start button and an interruption button for listening to the FM broadcast are provided, and operation of the FM tuner and audio amplifier etc. is permitted by inputting the start button and a recording start instruction By suspending the operation of the audio amplifier by inputting the suspend button (silence operation, etc.) and issuing the playback suspend instruction, the user does not need to be aware of the operation as the information recording / reproducing apparatus, and the recording medium such as a CD is used. It becomes possible to listen to the FM broadcast at any time as if playing.

Further, in the above operation example, for convenience of description, an example in which reproduction is performed from the recording start position about 5 seconds after the recording is started, that is, audio information to be recorded and input is reproduced with a delay of about 5 seconds. As described above, as a practical use example, by giving a reproduction start instruction and a reproduction interruption instruction from the operation unit 13 at an arbitrary time after the start of recording, a time within a range in which the maximum recording time of the recording medium is not exceeded. The reproduction operation accompanied by the shift can be performed.

As described above, in the information recording / reproducing apparatus of the present embodiment, the controller 10 receives the main information input from the outside by the information compression processing circuit 20 based on the main information recording instruction input from the operation unit 13. Are sequentially stored in the first buffer memory 21 at the first transfer speed, and the main information stored in the first buffer memory 21 is read by the recording data processing circuit 22 at the second transfer speed faster than the first transfer speed. The data is intermittently recorded on the magneto-optical disk 1 in block units. Further, the controller 10 instructs the main information reproducing command input from the operation unit 13 to the contents already recorded on the magneto-optical disk 1 in parallel with the intermittent recording on the magneto-optical disk 1 by the recording data processing circuit 22. On the basis of the above, the reproduction data processing circuit 9 intermittently reads out the main information on the magneto-optical disk 1 in block units and records it in the second buffer memory 14 at the second transfer speed, and the information expansion processing circuit 15 At, the main information stored in the second buffer memory 14 is sequentially read out at the first transfer rate and externally output.

As a result, even during the recording operation, the reproducing operation at an arbitrary position becomes possible at the same time, and the listening of the past broadcast contents traced back to the maximum recording time of the magneto-optical disk 1, that is, the FM broadcast etc. It is possible to realize a new information recording / reproducing apparatus capable of time-shifted listening. Therefore, the user only needs to give a direct recording instruction, and thereafter, reproduction can be performed as if a recording medium such as a CD or tape is handled. For example, even when a program of 2 hours is recorded, the recording is finished. It is possible to go back to an arbitrary time when the recording is finished without having to wait until the reproduction.

Furthermore, since it is easy to suspend and continue only the playback operation while recording and playing back at the same time, continuous playback without interruption of information even if the listening of the broadcast contents is interrupted is a troublesome operation. Can be done without doing.

Further, since the operation unit 13 is provided with the timer device for instructing the start of recording according to the preset recording start time, the operation unit 1 itself is operated at the predetermined recording start time.
The timer device automatically gives an instruction to start recording according to the recording start time, even if no input is made in step 3. Therefore,
The user only needs to set the timer for reserved recording, and after that, it can be played back at the same intervals as when dealing with recording media such as CDs and tapes. For example, even if a 2-hour program is recorded, recording will end. There is no need to wait for the reproduction until it is performed, and the reproduction can be traced back to an arbitrary time when the recording is completed. As a result, operability can be improved.

Further, by providing the operation section 13 with a function as a reproduction time instructing means for instructing the reproduction start time, it becomes possible to automatically reproduce at a predetermined time.

Further, at the time of reproduction, the controller 10 as the calculating means obtains the reproduction start absolute address value of the corresponding magneto-optical disk 1 corresponding to the instructed time, so that the information corresponding to the desired time is reproduced. It becomes possible. Thereby, operability can be improved.

Further, since the operation unit 13 is provided with the controller 10 as an external information input means for giving an instruction to record the main information on the recording medium based on the recording instruction information inputted together with the main information from the outside, this is provided. Therefore, even if it is not manually input directly, by including the main information to be input from the outside together with the main information recording instruction to the recording medium, the main information recording instruction to the recording medium is automatically instructed, As a result, it is possible to record on the recording medium. Thereby, operability can be improved.

Further, the controller 10 is provided with a function as a repeating means for sequentially repeating recording by the recording data processing circuit 22 and reproduction by the reproduction data processing circuit 9 within a predetermined area on the magneto-optical disk 1. Therefore, desired information can be repeatedly recorded and reproduced in sequence. Thereby, operability can be improved.

In the above embodiment, an example in which the CD format is applied as a base has been described, but the present invention is not limited to this, and it goes without saying that there are various forms of block configurations and sector configurations. Various forms can be applied to the address information.

In the present embodiment, the example of handling audio information has been described, but it is obvious that the present invention can be applied to the case of handling image information or other visual or auditory continuous information. Further, in the present embodiment, the example using compressed audio information has been described, but the present invention is not limited to this. Basically, if there is a difference in information transfer speed between the write side and the read side of the buffer memory,
It can be applied in various forms. For example, taking the above CD format as an example, conventional CD audio information that is not compressed (sampling frequency = 44.1 kHz, quantization bit number = 16 bits, channel number = It can be applied as it is.

Further, not only an optical disk device used as an external storage device for a computer but also a hard disk device, a floppy disk device or the like can be implemented without departing from the scope of the present invention.

[0093]

According to the information recording / reproducing apparatus of the invention of claim 1,
As described above, the first recording means for sequentially storing the externally input main information in the first memory means at the first transfer speed, and the main information stored in the first memory means are faster than the first transfer speed. Second recording means for reading at the second transfer rate and intermittently recording on the recording medium in block units; and main information on the recording medium for intermittent reading in block units and storing in the second memory means at the second transfer rate. A second reproducing means for sequentially reading out the main information stored in the second memory means at a first transfer rate and outputting it externally; and a first reproducing means for inputting a main information recording instruction to the recording medium. 1 input means, a second input means for inputting a main information reproduction instruction from a recording medium, and a first recording means for inputting a main information to the first memory means based on the main information recording instruction input from the first input means. Start writing main information, or While the main information recording on the recording medium by the second recording means is intermittently recorded, the contents already recorded on the recording medium are recorded in parallel with the intermittent recording on the recording medium by the second recording means. Main information is intermittently read from the recording medium by the first reproducing means based on the main information reproducing instruction inputted from the second input means, and the main information is externally output from the second memory means by the second reproducing means. The control means for performing the above is provided.

As a result, based on the main information recording instruction input from the first input means, the control means transfers the main information externally input by the first recording means to the first memory means at the first transfer speed. Sequentially stored, and the first recording is performed by the second recording means.
The main information stored in the memory means is read out at a second transfer rate higher than the first transfer rate and is intermittently recorded on the recording medium in block units. Further, the control means, in parallel with the intermittent recording on the recording medium by the second recording means, based on the main information reproducing instruction inputted from the second input means, the contents already recorded on the recording medium. The first reproducing means intermittently reads out the main information on the recording medium in block units and records the main information in the second memory means at the second transfer speed, and
The main information stored in the second memory means is reproduced by the reproducing means as the first information.
It is sequentially read at the transfer rate and output to the outside.

As a result, it becomes possible to immediately reproduce the already recorded contents even during recording.
As a result, the operability can be improved.

As described above, the information recording / reproducing apparatus of the invention of claim 2 is the information recording / reproducing apparatus of claim 1, wherein the first input means starts recording at a preset recording start time. A recording time instruction means for giving an instruction is provided.

As a result, the first recording is started at the predetermined recording start time.
The recording time instruction means automatically gives an instruction to start recording according to the recording start time without inputting by the input means. As a result, the operability can be improved.

As described above, the information recording / reproducing apparatus according to the third aspect of the present invention is the information recording / reproducing apparatus according to the first aspect, in which the reproduction time for instructing the reproduction start time to the second input means. The configuration is such that there is provided an instruction means and a calculation means for obtaining the reproduction start absolute address value of the corresponding recording medium corresponding to the instructed time.

As a result, it becomes possible to automatically reproduce at a predetermined time. Further, at the time of reproduction, the calculation means obtains the reproduction start absolute address value of the corresponding recording medium corresponding to the instructed time, so that it becomes possible to reproduce the information corresponding to the desired time. As a result, the operability can be improved.

As described above, the information recording / reproducing apparatus according to the invention of claim 4 is the information recording / reproducing apparatus according to claim 1, wherein the first input means inputs the recording instruction information from the outside together with the main information. The external information input means for instructing to record the main information on the recording medium based on the above is provided.

By this means, even if manual input is not made manually, main information input from the outside and main information recording instruction to the recording medium are included, so that main information recording is automatically performed on the recording medium. Can be recorded and recorded on the recording medium. As a result, the operability can be improved.

As described above, the information recording / reproducing apparatus according to the fifth aspect of the present invention is the information recording / reproducing apparatus according to the first aspect, wherein the control means has a second area within a predetermined area on the recording medium.
The recording medium is recorded by the recording means and the reproducing means by the first reproducing means is sequentially repeated.

As a result, desired information can be repeatedly recorded and reproduced in sequence. As a result, the operability can be improved.

[Brief description of drawings]

FIG. 1 is a flowchart showing a control operation of a controller of an information recording / reproducing apparatus in an embodiment of the present invention.

FIG. 2 is a schematic plan view showing an area arrangement of a magneto-optical disk used in the information recording / reproducing apparatus.

FIG. 3 is an enlarged plan view of the magneto-optical disk.

FIG. 4 is a schematic diagram showing a main data format in a sector of the magneto-optical disk.

FIG. 5 is a schematic diagram showing a sector configuration of the magneto-optical disk.

FIG. 6 is a schematic diagram showing a block configuration in a program.

FIG. 7 is a timing chart showing a flow of information relating to a recording operation.

FIG. 8 is a timing chart showing a flow of information relating to a reproducing operation.

FIG. 9 is a block diagram showing a configuration of an information recording / reproducing apparatus.

FIG. 10 is a timing chart showing a flow of information when a recording operation and a reproducing operation are performed in parallel.

FIG. 11 is a CD used in a conventional information recording / reproducing apparatus.
3 is a schematic plan view showing the area arrangement of FIG.

FIG. 12 is a schematic diagram showing a frame signal format of a CD.

FIG. 13 is a schematic diagram showing a sector format of a CD.

[Explanation of symbols]

 1 magneto-optical disk (recording medium) 3 optical head (first reproducing means / second recording means) 5 reproducing amplifier (first reproducing means) 9 reproduced data processing circuit (first reproducing means) 10 controller (control means) 13 operation Part (first input means, second input means) 14 Second buffer memory (second memory means) 15 Information expansion processing circuit (second reproducing means) 20 Information compression processing circuit (first recording means) 21 First buffer memory (First Memory Means) 22 Recording Data Processing Circuit (Second Recording Means) 23 Coil Driver (Second Recording Means) 24 Coil (Second Recording Means)

Claims (5)

[Claims] 1. An information recording / reproducing apparatus using a recording medium in which absolute address information is preformed, and first recording means for sequentially storing main information inputted from the outside at a first transfer rate in a first memory means. A second recording unit for reading the main information stored in the first memory unit at a second transfer rate faster than the first transfer rate and intermittently recording the main information on the recording medium in block units; A first reproducing means for intermittently reading in block units and storing in the second memory means at the second transfer speed, and a second reproducing means for sequentially reading out main information stored in the second memory means at the first transfer speed and externally outputting the main information. A reproducing means and a first means for inputting a main information recording instruction to the recording medium.
Input means, second input means for inputting a main information reproduction instruction from a recording medium, and a main memory for the first memory means by the first recording means based on the main information recording instruction input from the first input means. While the information writing is started and the main information recording on the recording medium by the second recording device is intermittently performed, the recording medium is already recorded in parallel with the intermittent recording on the recording medium by the second recording device. The main information is intermittently read from the recording medium by the first reproducing means based on the main information reproducing instruction inputted from the second input means, and the second memory by the second reproducing means. An information recording / reproducing apparatus, comprising: a control means for causing the external output of main information from the means. 2. The information recording / reproducing according to claim 1, wherein the first input means is provided with recording time instructing means for instructing recording start according to a recording start time set in advance. apparatus. 3. The second input means includes a reproduction time instructing means for instructing a reproduction start time, and an arithmetic means for obtaining a reproduction start absolute address value of a corresponding recording medium corresponding to the instructed time. 2. The information recording / reproducing apparatus according to claim 1, further comprising: 4. The external information inputting means for providing the main information recording instruction to the recording medium based on the recording instruction information inputted together with the main information from outside is provided in the first inputting means. The information recording / reproducing apparatus according to claim 1. 5. The control means is provided with a repeating means for sequentially repeating recording by the second recording means and reproduction by the first reproducing means within a predetermined area on the recording medium. 1. The information recording / reproducing apparatus described in 1.