JPH07210988A - Continuous data recording/reproducing method - Google Patents

Abstract

PURPOSE:To provide a method which records data in plural recording media securing continuously of data and reproduce and outputs specified continuous data immediately after the instruction of reproduction, in a data recording/ reproducing device in which a recording medium can be exchanged. CONSTITUTION:When a recording area of MD1-1 is in a full state to be exchanged, an input data of the time for exchange is stored in a DRAM 20, the stored data is read out at high speed mode after finish of changing and recorded in MD1-2 already changed, and it is returned to a normal mode at a point of time at which writing data of the DRAM 20 coincides with reading data of the DRAM 20 and input data is recorded. Also, the head part of the continuous data previously specified is read out from the MD1-1 and stored in a DRAM 22, data of the DRAM 22 is read out first by instruction of reproduction, an optical pickup 5 is made to seek for a track of continuous data during the time, and operation is switched to reading and reproducing from the MD1-1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous data recording method and a continuous data reproducing method, and is applied to a data recording / reproducing apparatus for a disk-shaped recording medium or a tape-shaped recording medium, and when the recording medium is replaced or The present invention relates to a method for continuously recording data without interruption during a reverse operation, and a reproducing method for enabling a quick reproduction output without interposing a read preparation operation time from a recording medium when a reproduction instruction is given.

[0002]

2. Description of the Related Art As a recording medium for recording an AV (Audio-Video) signal, a C for recording digitized AV data is used instead of a conventional magnetic tape for recording an analog signal.
D (Compact Disc), MD (Mini Disc), DVD (Digital
Disc-shaped recording medium such as Video Disc, DCC (Digital
Compact Cassette), DAT (Digital Audio Tape), D
Tape-shaped recording media such as VT (Digital Video Tape) are becoming widespread, and various data recording / reproducing devices have been developed according to the respective recording media.

By the way, as in the case of the conventional tape cassette, when the recording area of the recording medium becomes full during recording of a long-time performance, a conference, etc.,
The recording medium is exchanged and continuous recording is performed. In a data recording / reproducing apparatus capable of reciprocal recording on a tape-shaped recording medium, a reverse operation is performed to continue recording.

In this case, the AV data of the exchange time of the recording medium and the reverse operation time cannot be recorded, and the recording / recording of the performance results in incomplete recording, which is an important statement in the recording / recording of meetings and interviews. It is not uncommon for recording problems such as the contents to be missed and become a problem later. Therefore, two data recording devices are prepared, the other device is activated before the recording medium of one device becomes full, and the overlapping recording is performed by both devices to prevent recording omission. Measures are being taken.

Also, the following problems have been pointed out when data is reproduced from a disc-shaped recording medium by a disc device. In the disk device, the pickup is moved in the radial direction of the disk by the thread feeding device to seek to the track on which the music data to be reproduced is recorded, and in the CLV (Constant Linear Velocity) method, the rotation speed of the spindle motor is stable. Playback is started in this state. Therefore, the amount of movement of the optical pickup and the rotational acceleration of the disk become large depending on the recording position of the target data, and even if the reproduction sound is actually output, even if it is short, it is 0.5.
About a second, and if it is long, it takes a few seconds.

Therefore, the disk device for MD or CD is unsuitable for a device for reproducing a sound effect which is intermittently generated according to an instruction of a director or a motion of an actor in a studio or a theater. Even though MD and CD are excellent in sound quality and data storage, the open reel tape recorder is still used for reproducing the above-mentioned sound effects, and the metal tape indicating the stop position is a magnetic tape. The current situation is to paste it on and play / stop it.

A recent disk device has a built-in shock proof memory, which causes a sound break even when the pickup is misaligned due to an external impact or the like and the unreadable state continues for about 2 to 3 seconds. However, the time from the playback instruction to the output of the playback sound cannot be shortened.

[0008]

In view of the above-mentioned problems in the prior art, the present invention, in recent AV data recording / reproducing apparatuses, digitally processes and records / records signals.
Paying attention to the fact that the playback method is adopted and that various auxiliary storage means such as semiconductor memory and fixed disk device that can be accessed at high speed have been developed, recording media during recording and recording of performances and meetings. Provides a data recording method that allows continuous recording of recorded data without interruption even if replacement or reverse operation is required, and a data reproduction method that can substantially close the time from the reproduction instruction to the reproduction output to zero. It was created for the purpose of doing.

[0009]

According to a first aspect of the present invention, in a data recording apparatus in which a recording medium can be replaced, the recording speed of the recording medium can be switched between a normal mode and a high speed mode, and the recording medium needs to be replaced. When the time is Tc, the data transfer rate in the normal mode is Bn, and the data transfer rate in the high-speed mode is Bh, data writing in Bn and data reading in Bh are possible, and [Bn · Bh / ( Bh-Bn)] ・ Tc
The storage means having the above storage capacity is provided, and the data is input at the writing speed Bn to the storage means by the cyclic overwrite method, or immediately before or at the time when the recording area of the recording medium being recorded becomes full. After writing the data and exchanging the recording medium, the data in the storage means, which is continuous with the final data recorded on the recording medium before the exchange, is read at the reading speed Bh, and is recorded in the high speed mode on the exchanged recording medium. The present invention relates to a continuous data recording method characterized in that when the read data and the write data of the means coincide with each other, the recording speed of the recording medium is returned to the normal mode and the subsequent input data is recorded on the recording medium after the exchange.

According to a second aspect of the invention, in a data recording apparatus capable of reciprocally recording input data on a tape-shaped recording medium, the recording speed on the tape-shaped recording medium can be switched between a normal mode and a high speed mode. The time from the time when the end of the recording area of the tape-shaped recording medium is detected in the normal mode feeding to the time when the recording area is reached by the reverse feeding in the high speed mode after the reverse operation is Trv, the data transfer rate in the normal mode is Bn, Data transfer rate in high speed mode is Bh
In this case, data can be written in Bn and data can be read out in Bh, and a storage means having a storage capacity of [Bn.Bh/(Bh-Bn)].Trv or more is provided. On the other hand, when the input data is written at the writing speed Bn by the cyclic overwrite method and the tape end of the tape-shaped recording medium is detected, the tape-shaped recording medium in the storage means is based on the tape feeding speed in the normal mode. Writing, the data storage position corresponding to the last recorded data is obtained,
After the reverse operation, the tape-shaped recording medium is fed in the high-speed mode, and when it reaches the recording area of the tape-shaped recording medium, the data after the storage position in the storage means is read at a read speed Bh to perform the tape-shaped recording. The recording is performed on the medium in a high speed mode, and when the read data and the write data of the storage unit match, the recording speed is returned to the normal recording mode and the subsequent input data is recorded on the tape recording medium. It relates to the continuous recording method of the recorded data.

A third aspect of the present invention is a data reproducing apparatus for preliminarily designating continuous data to be reproduced from a recording medium, and reading and reproducing the continuous data designated based on a reproduction instruction from the recording medium. It is possible to access at a speed higher than the access speed, and a storage means having a storage capacity equal to or more than the data amount capable of reproducing the data of the recording medium in the time required from the input of the reproduction instruction to the output of the reproduction is provided, When there is an input, the beginning portion of the continuous data corresponding to the designation from the recording medium is stored in the storage means by at least the data amount, and when there is a reproduction instruction input, the data in the storage means is stored. While reading and reproducing, to the recording position of the recording medium where continuous data is recorded to the final data stored in the storage means by the reading unit. Ttoshi, when the last data is read from the storage unit, according to the method of reproducing data, characterized in that for reproducing continuous data to the final data from the recording medium is read.

According to a fourth aspect of the invention, in a data reproducing apparatus for reading out and reproducing the designated continuous data from the recording medium by designating the continuous data to be reproduced from the recording medium, the access speed to the recording medium is higher than that. And a storage means having a storage capacity obtained by multiplying the amount of data capable of reproducing the data of the recording medium by the number of continuous data of the recording medium in the required time from the designated input to the reproduction output. When the storage medium is loaded in the data reproducing device, the beginning portion of each continuous data of the storage medium is stored in the storage unit by the data amount, and when the continuous data is designated, While the data corresponding to the designation of the storage means is read and reproduced, continuous data is recorded in the final data stored in the storage means by the reading section. The method for reproducing data is characterized in that the recording medium is set to a recording position of the recording medium, and when the final data is read from the storage means, the data continuous with the final data is read from the recording medium and reproduced. Pertain to.

[0013]

According to the first aspect of the invention, in the present invention, regardless of the writing method to the storage means, the input data after the time when the recording medium being recorded is in the full state is stored in the storage means. Then, when the recording medium is replaced with the next recording medium, the data in the storage means is first recorded in the recording medium after the replacement in the high-speed mode, but the data is continuous with the final data recorded in the recording medium before the replacement. The input data is recorded on the recording medium before the replacement and the recording medium after the replacement in a continuous state.

Recording on the recording medium after replacement is executed in the high speed mode, but the storage capacity of the storage means is [Bn.
Since Bh / (Bh−Bn)] · Tc or more, the write data (real-time input data) and the read data match within the storage capacity of the storage means. Therefore, by returning the recording speed to the recording medium to the normal mode and recording the input data at the time of coincidence, the subsequent input data can be recorded in the recording medium in the normal mode. The "recording medium" in the present invention includes a disk-shaped recording medium and a tape-shaped recording medium, and a semiconductor memory or a fixed disk device can be used as the "storage means".

Regarding the second invention: The present invention relates to a continuous data recording method when a tape-shaped recording medium is reversed, and its basic principle is the same as that of the first invention. However, the minimum storage capacity of the storage means is determined in consideration of the process peculiar to the reverse operation, and the input data is written in the storage means by the cyclic overwrite method.

When the end of the recording area is detected while the recording in the normal mode is being performed on the tape-shaped recording medium, the final recording data on the tape-shaped recording medium is recorded immediately before it. The time from the time when the data is recorded to the time when the tape end is detected can be obtained from the tape feeding speed, and the storage position of the data continuous with the final data in the storage means can be obtained based on the time. Therefore, when the tape-shaped recording medium is reversely moved by the reverse operation and reaches the recording area of the tape, the data is read from the storage position of the storage means and high-speed recording is performed on the tape-shaped recording medium, so that the continuous data is recorded. If the recording is ensured and the recording speed is returned to the normal mode at the time when the read data and the write data of the storage means coincide with each other, the subsequent input data is recorded on the tape-shaped recording medium in the normal mode as in the first aspect of the invention. be able to.

Regarding the third invention: The present invention relates to a method for shortening the time from the reproduction instruction to the actual reproduction output when reproducing the data recorded on the recording medium. In this case, a storage means for preliminarily storing the beginning portion of the continuous data to be reproduced is used, but the storage means can access the recording medium at a speed higher than the access speed, and the reproduction is started from the time of inputting the reproduction instruction. It is necessary to have a storage capacity equal to or larger than the amount of data that can be reproduced from the recording medium in the time required until output.

When the continuous data to be reproduced is designated, the beginning portion of the continuous data corresponding to the designation is temporarily stored in the storage means by at least the amount of the data, and the reproduction instruction is given. At that stage, the data is read out first and reproduced, so that the time until reproduction output can be shortened. Further, while the data in the storage means is being reproduced, the reading section can be set at the recording position of the recording medium in which continuous data is recorded in the final data stored in the storage means. After the data has been reproduced, it is possible to reproduce the data on the recording medium while ensuring the continuity of the content and time of the data.

Regarding the fourth invention; like the third invention, the present invention also relates to a method for shortening the time from the reproduction instruction to the reproduction output, in which the continuous data is designated and immediately the designated continuous data is recorded. It is applied to a data reproducing device for reading from and reproducing. According to the present invention, at the stage when the recording medium is loaded into the apparatus, the beginning portion of all the continuous data recorded on the recording medium is stored in the storage means.

Therefore, no matter which continuous data is designated thereafter, the initial data relating to the designation of the storage means can be immediately reproduced by the same procedure as in the third aspect of the invention, and continuously at the time of reproducing the initial data. Data on the recording medium can be reproduced. In particular, since the beginning parts of all the continuous data are stored in advance, it is possible to deal with the case where the designation is made immediately after the reproduction of one continuous data is completed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Each embodiment of the "data continuous recording method and reproducing method" of the present invention will be described in detail below with reference to the drawings. First, FIG. 1 shows a system circuit diagram of an MD player for implementing the recording method of the first embodiment and the reproducing method of the second and third embodiments. In the figure, 1-1 to 4 are MDs, 2 is a spindle (SP) motor for driving MDs, 3 is a recording head, 4 is a head driver, 5 is an optical pickup for recording / reproducing, and 6 is a recording / reproducing unit. A servo circuit for controlling the focus / tracking / sliding of the recording / reproducing sections 3 and 5 and a rotation control of the SP motor 2, 8 an RF amplifier for amplifying the read signal of the optical pickup 5, 9 is a signal processing circuit for performing compression / modulation / error code correction and encoding / decoding of audio input / output signals, 10 is a DRAM which is a shock proof memory, 11 is an A / D converter of a signal input system, and 12 is a signal output. System D / A converter, 13 and 14 are LPF,
Reference numeral 15 is a display unit, 16 is an operation unit, and 17 is a system controller (SCU) that controls the operation of the entire system. Also, this MD player has an automatic MD exchange function,
MD1-1 ~ 4 by the disc changer 18 controlled by U17
Can be exchanged.

The above-mentioned units and the like are provided in a normal MD player having an automatic MD exchange function, but in this embodiment, between the signal processing circuit 9 and the head driver 4 in the recording system. Switch circuit 19 and DRAM
A switching circuit 21 and a DRAM 22 are provided between the signal processing circuit 9 and the D / A converter 12 in the reproducing system in a circuit configuration as shown in the figure.
It is characterized in that the switching of 1 and the R / W control of the DRAMs 20 and 22 are performed, and that the recording speed to the MD can be switched between the normal mode and the high speed mode (for example, the double speed mode).

The DRAM 20 is capable of writing in the normal mode and reading in the high speed mode. The time required for the disk changer 18 to replace the MD is Tc (for example, 6 seconds), and in the normal mode and the high speed mode. When the data transfer rates are Bn and Bh, respectively, [Bn.Bh/(Bh-B
n)]-Has a storage capacity of Tc or more. Also, DRAM2
2 is accessible in the normal mode and has a storage capacity capable of storing the beginning portion of the music data recorded on the MD for a fixed time.

Embodiment 1; This embodiment corresponds to the first invention (continuous data recording method), in which the audio input data MD1- is used in the MD player shown in FIG.
Figure 2 shows the operation procedure for continuous recording from 1 to MD1-2.
This will be described with reference to the timing chart of FIG. First, the system is set to the recording mode, and the switch circuit 19 is connected to the side a in the writing state with respect to MD1-1. Also, the recording at that stage is executed in the normal mode, and the audio input signal is LP
F13 → A / D converter 11 → Signal processing circuit 9 → Switch circuit 19
→ Head driver 4 → Recording head 3 is transferred, and the input data compressed and modulated by the signal processing circuit 9 is recorded in MD1-1 (S1).

When the recording head 3 moves to the outermost track of MD1-1 due to the continuation of recording on MD1-1, the SCU 17 confirms it from the servo circuit 7 and immediately puts the DRAM 20 into the write mode. Set the input data output from the signal processing circuit 9 to the DRAM 2
Write to 0 (S2, S3). Then, when writing to the outermost track is completed and the recording area of MD1-1 becomes full, writing to MD1-1 is stopped, but SCU17 writes address of DRAM20 at that time (t1 in FIG. 2). AD
Save the DX in the internal memory (S4 to S6).

Here, the SCU 17 is a disc changer 18.
An exchange instruction signal is output to the disc changer 18, and the disc changer 18 exchanges the MD1-1 with the next MD1-2 (S7).
Therefore, in this state, the input data is DRA in the normal mode.
The MD exchange will be executed while the data is being written to M20, and the data after the last recorded data to MD1-1 will be DRA.
Stored in M20.

Then, the SP motor is replaced by the above replacement operation.
When the MD1-1 is removed from the hub of No. 2 and a new MD1-2 is set, the SP motor 2 is started by the servo circuit 7 and its rotation speed stabilizes (t2 in FIG. 2), the SCU 17 The switch circuit 19 is switched and connected to the b side and the high speed mode is set (S8 to S10). In this high speed mode, the servo circuit 7 rotates the SP motor 2 in the high speed mode, and in synchronization with this, the data after the address ADDX of the DRAM 20 is read in the high speed mode and the read data is recorded in MD1-2 (S11). Therefore, high-speed recording is performed on the MD1-2 from the data continuous with the final recording data of the MD1-1. At the start of recording, index data indicating continuous recording can be recorded in the auxiliary recording area of MD1-2.

By the way, while the input data is continuously written in the DRAM 20 in the normal mode after step S3,
After step S11, the data after the address ADDX is read in the high speed mode. Therefore, MD replacement time: Tc
The amount of data written in (= t2-t1) is Bn.Tc, and if the elapsed time after the start of reading (S11) is Tx, the DRAM is
A data amount of Bn · (Tc + Tx) is recorded after the address ADDX of 20, while the read data amount from the start of reading (S11) to that point is Bh · Tx.
Tx satisfying the condition of Bn (Tc + Tx) = BhTx gives the time when the write data and the read data match. In other words, when Tx = [Bn / (Bh-Bn)]. Tc, Bh.Tx corresponds to the amount of data written until the write data and the read data match at address ADDX and thereafter. If the storage capacity of the DRAM 20 is set to [Bn.Bh/(Bh-Bn)].Tc or more as described above, input data can be written in the DRAM 20 without being lost.

Therefore, after the high speed mode is set as described above, the SCU 17 detects and monitors the read data from the DRAM 20 and the data written from the signal processing circuit 9 to the DRAM 20, and both data are monitored. When a match (a match of the data bit string or a match of the sub data in the cluster) is reached, at that point (t3 in FIG. 2), the switch circuit 19 is immediately switched and connected to the original a side, and the data in the DRAM 20 is cleared to switch to the normal mode. And continue recording to MD1-2 (S12-S14). As a result, the audio input data is M
It is recorded continuously from D1-1 to MD1-2, and even if the MD is exchanged during a long performance or recording of a conference, it is possible to successively record to multiple MDs while ensuring the continuity of data. You can

In this embodiment, the recording head 3 is MD1.
-1 from the recording state moved to the outermost track
Although the input data is always written to the DRAM 20 by the cyclic overwrite method, the input data may be read by the same management method.
Also, if a method of displaying a message prompting the user to replace the MD on the display unit 15 or a method of blinking the LED is used for a certain time before the recording area of the MD being recorded is full, the MD is manually replaced in advance. Since a relatively quick exchange can be performed by preparing for this, even the MD player without the disc changer 18 can execute the continuous recording operation without increasing the storage capacity of the DRAM 20 so much.

Embodiment 2; This embodiment corresponds to the third invention (data reproducing method), and M shown in FIG.
M in which music data is recorded in advance in the D player
The present invention relates to a method of outputting a reproduced sound immediately after a reproduction instruction when reproducing data from D1-1.

The operation procedure will be described below with reference to the flowchart of FIG. First, the system is set to the reproduction mode, and the switch circuit 21 is connected to the c side. Then, when MD1-1 is loaded and the selection of the reproduction music and the reproduction order thereof are preliminarily input from the operation unit 16, SC is displayed.
U17 saves the reserved input data in the internal memory (S
21, S22). When a standby instruction is input from the operation unit 16 after that, the SCU 17 sets the preliminary operation mode, the SP motor 2 is activated by the servo circuit 7 to rotate the MD 1-1, and the focus of the optical pickup 5 is adjusted. And then M
TOC recorded in the inner area of D1-1 (Table
of Contents) data is read and saved in internal memory
(S23-S25).

Further, in this embodiment, the DRAM 22 has a storage capacity capable of storing the music data for 3 seconds in the normal mode.
5 is moved to the MD1-1 track in which the selected music data having the first reproduction order is recorded, and the data for the first 3 seconds of the music data is read and stored in the DRAM 22 (S26, S27). Then, after the initial data is stored in the DRAM 22, the system temporarily enters the standby state (S28).
In this case, it is assumed that the sub data of the final cluster in the data stored in the DRAM 22 is SDp.

Next, when there is an instruction to reproduce the music from the operation unit 16 in the standby state, the SCU 17 immediately switches and connects the switch circuit 21 to the d side, reads the music data from the DRAM 22 and switches the switch circuit 21 → D / A converter 12 → LPF1
Transfer to 4 and play back audio (S31). Further, in parallel with the reproduction operation, the SCU 17 causes the servo circuit 7 to seek the optical pickup 5 to the track in which the sub data SDp of the selected music data in MD1-1 is recorded (S3).
2). Since the DRAM 22 stores the initial data for 3 seconds, the seek of the optical pickup 5 may be completed within 3 seconds, and the operation is completed within the normal seek time.

Next, when the music data for 3 seconds is read from the DRAM 22 to the final cluster and the sub data SDp is read, the SCU 17 immediately causes the switch circuit 21 to return to the original c.
The data after the sub data SDp of MD1-1 which is read out by the optical pickup 5 and is output from the signal processing circuit 9 is switched circuit 21 → D / A converter 12
→ Transfer with LPF14 and play voice (S33-S35). In that case, as described above, the optical pickup for the target track
Since the seek of 5 is completed, the continuity of the read data of the DRAM 22 and MD1-1 is ensured, and smooth and smooth music reproduction is performed. Therefore, according to this embodiment, unlike the general MD player, the seek time of the optical pickup does not intervene after the reproduction instruction and the music data selected and designated can be reproduced immediately after the reproduction instruction. it can.

When the reproduction of the first selected music data is completed, the beginning 3 of the second music data is automatically
Rewrite the previously stored data for the seconds and store it in the DRAM 22 (S36, S37 → S38 → S27), and execute the reproduction in the same procedure.
(S27-S36). Further, thereafter, while using the DRAM 22, all the reserved music pieces are rapidly reproduced every time there is a reproduction instruction (S27 to S37 → S38 → S27). still,
In the MD player of this embodiment, the DRAM 22 is provided between the signal processing circuit 9 and the switch circuit 21, but an A / D converter is provided in the next stage of the RF amplifier 8 and the A / D converter and the signal processing are performed. It may be provided between the circuits 9. In that case, since the data before decompression can be stored, D
A RAM 22 having a small storage capacity can be used.

Third Embodiment: This embodiment also relates to a data reproducing method, and the MD player shown in FIG. 1 executes the same function as the second embodiment. However, in the system circuit, in the second embodiment, the storage capacity of the DRAM 22 was set to be able to store the music data for 3 seconds in the normal mode, but in this embodiment, the storage capacity is further increased. A DRAM 22 having a storage capacity capable of storing the beginning data of the minute (for 30 seconds) is used.

The operation procedure of this embodiment will be described below with reference to the flowchart of FIG. First, when the system is in the reproduction mode, the switch circuit 21 is connected to the c side, the MD1-1 is loaded, and the selection of reproduction music and the reproduction order are input from the operation unit 16 by reservation input data. Save and standby instructions are input, and M is entered in the preliminary operation mode.
The operation until the TOC data of D1-1 is read and saved is the same as that of the second embodiment (S41 to S45).

In this embodiment, the data for the first 3 seconds of all the reserved music data (10 music in this case) are sequentially read out and stored in the DRAM 22, and the system waits when the storage is completed. The state is set (S46, S47).

Next, when there is an instruction to reproduce the music, S
The CU 17 immediately switches and connects the switch circuit 21 to the d side, reads the first selected music data of the DRAM 22 and transfers it to the switch circuit 21 → D / A converter 12 → LPF 14 for voice reproduction (S48 to S51). In parallel with the reproduction, the servo circuit 7 causes the optical pickup 5 to seek to the track in which the sub data SDp (P = 1) of the first selected music piece data in MD1-1 is recorded (S52). And DRA
When the sub data SDp is read from M22, the switch circuit 21 is switched to the c side and connected, and the music data after the sub data SDp in MD1-1 is reproduced (S53 to S56).

The above-mentioned reproduction procedure is the same as that of the second embodiment, but in this embodiment the beginning parts of all the reserved music data are already stored in the DRAM 22 (S46).
It is not necessary to read and store the beginning part of the next second selected song data at the stage where all the first selected songs have been reproduced, and the standby state is maintained (S56, S57). And
If there is an instruction to reproduce the next selected music data, the above steps S49 to S56 are immediately executed, and the process proceeds to reproduction of the second selected music data (S57, S58 → S59 → S49).

After that, in the same manner, each time there is an instruction to reproduce the music, the next selected music is reproduced and the tenth selected music is reproduced (S49 to S58 → S59 → S49). Of course, as in the case of the second embodiment, the time from the reproduction instruction to the reproduction output for each music is extremely short. According to this embodiment, in the reproduction of the second and subsequent selected music pieces, it is not necessary to read the beginning portion of the next selected music data one by one every time the reproduction of each selected music data is completed, so that one music piece is read. It is also possible to deal with the case where the next music reproduction instruction is issued immediately after the reproduction is completed.

Embodiment 4; This embodiment corresponds to the fourth invention (data reproducing method) and executes the same function as that of the third embodiment, but the MD player reproduces the music data. It is applied when a method is adopted in which the designated music data is immediately played back only by designation. In terms of the circuit, the DRAM 22 has a memory capacity of 10 as in the third embodiment.
It is assumed that it has a storage capacity capable of storing the beginning data (for 30 seconds) of a song.

The operation procedure of this embodiment will be described below with reference to the flowchart of FIG. First, when the system is in the reproduction mode and the switch circuit 21 is connected to the c side and MD1-1 is loaded, in this embodiment, immediately S
CU17 sets the pre-operation mode and SP is done by servo circuit 7.
After starting the motor 2 and rotating MD1-1 and adjusting the focus of the optical pickup 5, the TOC (Table of Content) recorded in the inner area of MD1-1
s) Read the data and save it in the internal memory (S61 to S6
3). Then, in succession to the operation, the beginning 3 seconds of all song data of MD1-1 (10 songs in this case) are read and D
It is stored in the RAM 22 (S64).

When the above operation is completed, the system goes into a standby state for inputting designation of a reproduced music piece (S65). Here, when the reproduction music is designated, as in the case of the third embodiment, the SCU 17 immediately switches and connects the switch circuit 21 to the d side to read and reproduce the specified music data of the DRAM 22, and at the same time, the optical pickup. 5 is sought to the track in which the sub data SDx of the final cluster of MD1-1 is recorded (S67 to S69). Naturally, the sub data SDx
Corresponds to the final cluster of the beginning data of the designated music stored in the DRAM 22.

Then, the sub data SDx is output from the DRAM 22.
When SCU17 is read, the SCU 17 switches the switch circuit 21 to the c side to reproduce the designated music data after the sub data SDx of MD1-1, complete the reproduction of the music data, and return to the standby state (S70). ~ S73 → S65). After that, similarly,
The above-described operation (S65 to S73) is repeatedly executed (S65 to S73 → S65) every time a reproduction music is designated. Therefore, also in this embodiment, the same quick reproduction function as that in the third embodiment can be obtained, and in particular, the music can be freely selected and specified from 10 songs without specifying the reproduction order of the music in advance, and the operation is simpler. Has the advantage that

Fifth Embodiment: This embodiment corresponds to the second invention (a continuous data recording method for a tape-shaped recording medium). First, FIG. 7 is a system circuit diagram of a DCC player. In FIG. 7, 31 is a DCC, 32 is a cassette drive mechanism, 33 is a recording / reproducing head, 34 is a recording / reproducing circuit including a recording amplifier and a reproducing amplifier. , 35
Is a cassette drive motor, 36 is a motor control circuit,
The other input / output system, the signal processing circuit 9, the system control system, and the circuit configuration including the switch circuits 19 and 21 and the DRAMs 20 and 22 are the same as those of the MD player of FIG. However, in this system, the DRAM 20 detects the leader tape from the magnetic tape of the DCC 31 in the normal mode feed and performs the reverse operation, and then passes the leader tape in the reverse feed in the high speed mode until it reaches the recording area. Time to T
rv, when the data transfer rate in the normal mode is Bn and the data transfer rate in the high speed mode is Bh, [Bn · Bh / (B
h−Bn)] · Trv or more, and it is possible to write data in Bn and read data in Bh. Further, in the case of DCC, since the data format is different from that of MD, the signal processing circuit 9 executes digital signal processing corresponding to DCC.

Hereinafter, in the DCC player shown in FIG. 7, an operation procedure for reciprocally recording audio input data on a DCC magnetic tape will be described with reference to FIG. 8 and FIG. 8 showing the correspondence between the tape recording state and the data storing state in the DRAM 20. This will be described with reference to the flowchart of FIG. First, the system is set to the recording mode, and the switch circuit 19 is connected to the a side. And here, while feeding the magnetic tape of DCC31 in the FORWARD direction in the normal mode, the audio input signal is LPF13 → A / D converter 11 → signal processing circuit 9 → switch circuit 19 → recording / reproducing circuit 34 → recording / reproducing head. It is assumed that the input data compressed by the signal processing circuit 9 is recorded on the magnetic tape after being transferred to the 33 (S
81). Further, in this embodiment, the input data processed by the signal processing circuit 9 in the recording state is the DRAM 20.
Is also written in the cyclic overwrite method to the DRAM
The preceding data of [Bn.Bh/(Bh-Bn)].Trv or more is always stored in 20 (S81).

In this state, if recording is continued for a long time, the recording area of the magnetic tape will end and the leader tape will be detected. However, when the SCU 17 detects it from the signal processing circuit 9, At time t1) in FIG. 8, the built-in timer starts counting (S82, S83). Then, at the time when the tape end is detected (t2 in FIG. 8), the reverse operation is immediately started, and the motor control unit 36 reversely activates the motor 35 to execute the high-speed reverse feeding of the magnetic tape and perform recording / recording.
Switch the playback circuit 34 to the reverse feed recording state (S84 to S8
6).

When the tape end is detected (see FIG. 8)
At t2), the count value Δt (= t2-t1) of the timer is read in parallel with the above operation, and the time when the tape end detection time is added to the time Δt is added to the DRAM20 at the time when the leader tape is detected (t1). Write address (ADD1) of (S87, S
88).

By the way, the first portion of the reversely fed magnetic tape is naturally the leader tape, but the leader tape section ends by high-speed reverse feeding. SCU
When the end 17 of the leader tape section is detected from the signal processing circuit 9, the switch 17 immediately switches and connects the switch circuit 19 to the side b at the time (t3), and the address (ADD
From 1) is sequentially read in the high speed mode, and the read data is transferred to the recording / reproducing circuit 34 via the switch circuit 19 to be recorded on the magnetic tape of the DCC 31 (S89 to S9).
1).

In this case, the writing of the input data to the DRAM 20 is continuously executed at the speed corresponding to the normal mode (data transfer speed: Bn), and the data reading from the DRAM 20 is performed at the magnetic tape feeding speed. It is executed in the synchronized high speed mode (data transfer speed: Bh). Therefore, if the storage capacity of [Bn.Bh/(Bh-Bn)].Trv or more is given to the DRAM 20 in the same manner as in the first embodiment, the input to the DRAM 20 will be performed with the passage of time. The data write address and the data read address from the DRAM 20 match. That is, in FIG. 8, the time from the leader tape detection time (t1) in the FORWARD direction to the leader tape detection time (t3) in the REVERSE direction corresponds to Trv, and after the time Trv has elapsed, reading in the high speed mode is performed. When recording is executed, the write address and read address match at time t4, and if the address at the match is ADD4,
The data amount of the addresses ADD1 to ADD4 is within the storage capacity of the DRAM 20.

Therefore, the SCU 17 monitors the read address and the write address of the DRAM 20 from the time when the leader tape is detected in the REVERSE direction (t3), and at the time when both addresses match (t4), the switch circuit 19 is immediately restored to the original a. To the magnetic tape of the DCC 31 by transferring the input data output from the signal processing circuit 9 to the recording / reproducing circuit 34 and switching the tape feed speed to the normal mode by the motor control unit 36. Continue recording (S92
~ S94). As a result, DC during long performances and recordings of meetings
Even if the reverse operation of C31 occurs, the audio input data can be recorded in the recording area after the reverse operation while ensuring the continuity of the data.

In this embodiment, the continuous data recording method during the reverse operation has been described.
Even when the 31 is replaced, if the storage capacity of the DRAM 20 is set to a size that allows for the replacement time, audio input to a plurality of DCCs is managed while managing the DRAM 20, as in the case of the MD replacement described in the first embodiment. It is possible to have continuous recording of data. Further, in the system of this embodiment, the output system is provided with the DRAM 22 and the switch circuit 21, and by executing the same procedure as in the second, third and fourth embodiments in the reproduction mode, the music reproduction is performed immediately after the reproduction instruction. It can also be done.

[0055]

The "data continuous recording method and reproducing method" of the present invention has the following effects due to the above configuration. According to the invention of claim 1, in the data recording apparatus, when the recording area of the recording medium becomes full due to continuous writing of data to the recording medium and the recording medium is replaced, the input data at the time required for the replacement is input. Recording on the recording medium after replacement while ensuring continuity with the final data of the recording medium before replacement, and automatic continuous recording on multiple recording media without loss of input data To enable. In particular, when recording and recording long-term performances and meeting contents with a disk device or video tape recorder for MDs and recordable CDs, continuous recording without being restricted by the recording capacity of the recording medium It provides the convenience of being able to. According to the invention of claim 2, in a data recording device for a tape-shaped recording medium, loss of data recording during reverse operation is eliminated, and input data is provided with continuity of data in a recording area in the FORWARD feeding direction and the REVERSE feeding direction. It is possible to record while securing. According to a third aspect of the present invention, in a data reproducing apparatus which previously specifies continuous data to be reproduced and reproduces the specified continuous data from a recording medium based on a reproduction instruction, the time from the reproduction instruction to the reproduction output is shortened. In particular, it is possible to use an MD or CD with excellent sound quality and storability in a reproducing device that intermittently reproduces the sound effect in a studio, a theater, etc. Realize a playback device to generate. According to the invention of claim 4, when a plurality of continuous data to be reproduced are designated in the invention of claim 3, even when the next reproduction instruction is issued in a short time after the previous data reproduction is performed. , It is possible to immediately reproduce and output the next data. The invention of claim 5 realizes the same function as that of the invention of claim 4, in a data reproducing apparatus for reading out and reproducing the continuous data according to the designation only by designating the continuous data to be reproduced from the recording medium. To do.

[Brief description of drawings]

FIG. 1 is a “data continuous recording method and reproducing method” of the present invention.
6 is a system circuit diagram of an MD player that implements the recording method of the first embodiment and the reproduction method of the second and third embodiments according to the present invention.

FIG. 2 is a diagram showing an operation procedure of the MD player according to the first embodiment,
6 is a timing chart showing the recording states of 1-1 and 1-2 and the data storage state of the DRAM 20.

FIG. 3 is a flowchart showing an operation procedure of the MD player according to the first embodiment.

FIG. 4 is a flowchart showing an operation procedure of the MD player according to the second embodiment.

FIG. 5 is a flowchart showing an operation procedure of the MD player according to the third embodiment.

FIG. 6 is a flowchart showing an operation procedure of the MD player according to the fourth embodiment.

FIG. 7D for carrying out the data reproducing method according to the fifth embodiment.
It is a system circuit diagram of a CC player.

FIG. 8 is a correspondence diagram showing a tape recording state and a data storage state in the DRAM 20 in the operation procedure of the DCC player according to the fifth embodiment.

FIG. 9 is a flowchart showing an operation procedure of the DCC player according to the fifth embodiment.

[Explanation of symbols]

1-1 to 4 ... MD (recording medium), 2 ... Spindle (SP) motor, 3 ... Recording head, 4 ... Head driver, 5 ... Optical pickup, 6 ... Thread feeding device, 7 ... Servo circuit, 8 ... R
F amplifier, 9 ... Signal processing circuit, 10 ... Shockproof memory = DRAM, 11 ... A / D converter, 12 ... D / A converter, 1
3, 14 ... LPF, 15 ... Display section, 16 ... Operating section, 17 ... System controller (SCU), 18 ... Disk changer, 19, 2
1 ... Switch circuit, 20,22 ... DRAM (storage means), 31 ... D
CC (recording medium), 32 ... Cassette drive mechanism, 33 ... Recording / playback head, 34 ... Recording / playback circuit, 35 ... Cassette drive motor, 36 ... Motor control circuit, Tc ... Disk exchange time.

Claims (5)

[Claims] 1. A data recording apparatus in which a recording medium can be exchanged, the recording speed of the recording medium can be switched between a normal mode and a high speed mode, and a time required for exchanging the recording medium is Tc, and data transfer in the normal mode. When the speed is Bn and the data transfer speed in the high speed mode is Bh, the data can be written in Bn and the data can be read in Bh.
h / (Bh−Bn)] · Tc or more storage means is provided, and the storage area of the recording medium being recorded is full by the cyclic overwrite method with respect to the storage means. Input data is written at the writing speed Bn from the time point or immediately before that, and after the recording medium is exchanged, the data of the storage means which is continuous with the final data recorded on the recording medium before the exchange is read at the reading speed Bh to record after the exchange. The recording is performed on the medium in a high speed mode, and when the read data and the write data of the storage unit match, the recording speed for the recording medium is returned to the normal mode and the subsequent input data is recorded on the exchanged recording medium. The continuous recording method of the data. 2. A data recording apparatus capable of reciprocally recording input data on a tape-shaped recording medium, wherein a recording speed on the tape-shaped recording medium can be switched between a normal mode and a high speed mode, and a normal mode feed is performed. At time Trv from the time when the end of the recording area of the tape-shaped recording medium is detected until the recording area is reached by reverse feeding in the high speed mode after reverse operation, Bn is the data transfer speed in the normal mode, When the data transfer rate is Bh, data can be written in Bn and data can be read out in Bh, and a storage means having a storage capacity of [Bn.Bh/(Bh-Bn)].Trv or more is provided. The input data is written into the storage means at a writing speed Bn by the cyclic overwrite method, and when the tape end of the tape-shaped recording medium is detected, the normal mode test is performed. The data storage position corresponding to the final write data of the tape-shaped recording medium in the storage means is obtained based on the feed speed, and after the reverse operation, the tape-shaped recording medium is fed in the high-speed mode. At the time of reaching the recording area, the data after the storage position in the storage means is read at the read speed Bh and recorded on the tape-shaped recording medium in the high speed mode, and the read data and the write data of the storage means coincide with each other. Then, the continuous recording method of data is characterized in that the recording speed is returned to the normal recording mode and the subsequent input data is recorded on the tape-shaped recording medium. 3. A data reproducing apparatus for preliminarily designating continuous data to be reproduced from a recording medium, reading the continuous data designated based on a reproduction instruction from the recording medium and reproducing the data, the speed being higher than an access speed to the recording medium. Is provided, and a storage means having a storage capacity larger than the amount of data capable of reproducing the data of the recording medium is provided in the time required from the input of the reproduction instruction to the output of the reproduction, and the designated input is made. In this case, at least the beginning portion of the continuous data corresponding to the designation from the recording medium is stored in the storage means by at least the data amount, and when there is a reproduction instruction input, the data in the storage means is read and reproduced. Meanwhile, the reading unit is set to the recording position of the recording medium in which continuous data is recorded in the final data stored in the storage unit, A data reproducing method, characterized in that, when the final data is read from the storage means, the data continuous with the final data is read from the recording medium and reproduced. 4. The data reproducing method according to claim 3,
The storage capacity of the storage means is set to be a multiple of the amount of data capable of reproducing the data of the recording medium in the required time from the input of the reproduction instruction to the reproduction output, and the designation of the continuous data to be reproduced is accompanied by the reproduction order. When there are a plurality of data, the beginning portion of the continuous data corresponding to each designation is stored in the storage means, and each time there is a reproduction instruction input, the beginning portion data is read out from the storage means and reproduced and recorded. A method for reproducing data, which comprises reading and reproducing data that is continuous with the beginning portion data from a medium. 5. A data reproducing apparatus for reading out and reproducing the specified continuous data from the recording medium by specifying the continuous data to be reproduced from the recording medium, the access to the recording medium at a higher speed than the access speed. It is possible to provide a storage means having a storage capacity obtained by multiplying the amount of data capable of reproducing the data of the recording medium by the number of continuous data of the recording medium in the required time from the designated input to the reproduction output. When the medium is loaded in the data reproducing device, the beginning portion of each continuous data of the storage medium is stored in the storage unit by the amount of the data, and when the continuous data is designated, the storage unit stores the continuous data. The recording in which continuous data is recorded in the final data stored in the storage means while reading and reproducing the data corresponding to the designation. A data reproducing method characterized in that the data is set at a recording position of a medium, and when the final data is read from the storage means, data continuous with the final data is read from the recording medium and reproduced.