JP2989416B2 - Magnetic tape playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape reproducing apparatus for reproducing information such as music recorded on a magnetic tape,
More particularly, the present invention relates to a magnetic tape reproducing apparatus having a function of detecting the end of a recording area being reproduced and automatically switching to a reproduction operation of the other recording area.

[0002]

2. Description of the Related Art A conventional apparatus for reproducing a magnetic tape having two tracks extending in a longitudinal direction and parallel to each other, which automatically switches from a reproduction operation of one track to a reproduction operation of the other track, is as follows. There was something.

For example, even when the reproduction of the information recorded on the track A is completed during the reproduction of the track A, a non-recording portion (including a leader tape) is provided until the end of the track A.
Or a device that starts the reproducing operation from the start end on the B track side after detecting the end. For example, the A track being reproduced by detecting the tape end space based on the length of the non-recorded portion after the recorded information. A device that fast-forwards to the end and then starts a reproduction operation from the beginning of the B track has been commercialized.

[0004]

However, in the former method of the prior art, when the reproduction of the recorded information on track A is completed,
At least the time required for reproducing the leader tapes of both tracks is required before the reproduction of the recorded information of the track is started, and there is a non-recording portion or space where no information is recorded at the end of track A or the start of track B. In such a case, a longer time is required, and there is a problem that a long silence occurs when the track is switched.

In the latter method, the time can be reduced by the amount by which the leader tape and the end space of the track A can be fast-forwarded, but the waste time of reproducing the leader tape and the start space of the track B is also required. Therefore, it takes a long time from the end of reproduction of the record information of the track A to the start of reproduction of the record information of the track B.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a magnetic tape capable of shortening the time from the end of reproduction of recorded information on one track to the start of reproduction of recorded information on the other track to a very short time. A playback device is provided.

[0007]

According to a first aspect of the present invention, there is provided a magnetic tape reproducing apparatus comprising: a magnetic tape having two recording areas extending in a longitudinal direction and parallel to each other; a tape running means for reciprocating the magnetic tape; An information reading means for selectively reading information recorded in both recording areas of the magnetic tape while running the magnetic tape; and an output signal from the information reading means for reading information on a recording area of the magnetic tape being reproduced. State detecting means for detecting a recording portion to determine the duration of the non-recording portion, detecting the recording status of the recording region being reproduced based on the duration, and performing a reproducing operation of one recording region of the magnetic tape. When the state detecting means detects the tape end space, the operation is switched from the reproduction operation of one recording area to the constant speed search operation in the end direction of the other recording area. An operation switching means for starting a constant-speed search operation of the recording area from the same position as the reproduction end position of one of the recording areas previously reproduced, and an output signal of the state detecting means at the beginning of the constant-speed search of the other recording area High-speed search direction determining means for determining a high-speed search direction based on the high-speed search direction determined by the high-speed search direction determining means; and causing the magnetic tape to run at high speed in the high-speed search direction determined by the high-speed search direction determining means. while Ru and a high speed search device for executing out, the high-speed search direction decision
The means is a constant speed sensor as a result of the detection by the state detecting means.
If the switch operation start position is in the recording state,
Determined in the direction toward the start of the recording area, and
If the device is in the non-recording state, it will be
Reference time longer than the time for determining the space between recorded information
Compare the duration of the non-recorded area with the
The high-speed search direction is recorded according to the detection of the recording area.
Non-recording area shorter than the reference time determined in the end direction of the area
The fast search direction is set at the beginning of the recording
It shall be determined in the end direction.

Further, in the magnetic tape reproducing apparatus according to the second aspect, two parallel recording areas extending in the longitudinal direction are formed.
Magnetic tape, and a tape for reciprocating the magnetic tape.
Loop running means and the magnetic tape while running the magnetic tape.
The information recorded in both recording areas of the tape
Information reading means for selectively reading and output of the information reading means;
Non-recording area on both recording areas of the magnetic tape by force signal
Is detected to determine the duration of the non-recording portion.
State detection means for detecting the recording state of the recording area based on the
And the reproduction operation of one recording area of the magnetic tape.
The above state detection means sets the tape end position of the recording area being reproduced.
When the pace is detected, the other recording area on the non-playback side
High-speed search that determines the high-speed search direction based on the recording state of the
Search direction determining means and the high-speed search direction determining means.
High-speed running of the above magnetic tape in the determined high-speed search direction
And based on the output of the state detection means,
High-speed search means for executing the operation, and one of the above magnetic tapes
The state detection means performs reproduction in the reproduction operation of the recording area of
Detecting the end of tape in the middle recording area
From the reproduction operation of one recording area
Switch to high-speed search operation of the other recording area by
The high-speed search operation of the other recording area
Operation to start from the same position as the playback end position in the recording area
Switching means, while the high-speed search direction determining means is provided.
However, as a result of the detection by the state detecting means,
From the detection of the non-recording part of the area,
The other non-playing side until the pace is determined
When recording information is detected in the recording area,
To determine the recording direction and determine the recording direction.
When not, set the high-speed search direction to the end of the recording area.
Shall be determined.

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

SUMMARY OF] According to the magnetic tape reproducing apparatus according to claim 1,
When a tape end space is detected in the recording area being reproduced, the constant speed search operation in the end direction of the other recording area on the non-reproduction side is started from the same position as the reproduction end position of the recording area being reproduced. Then, the high-speed search direction is determined based on the recording state detected by the constant-speed search operation, and the magnetic tape is caused to run at a high speed in the determined high-speed search direction to search for the recorded information. Therefore, the time required from the end of the reproduction of the recording information in one recording area to the start of the recording information in the other recording area is once fast-forwarded or reproduced to the end of the recording area being reproduced, and then to the start of the other recording area. This makes it possible to greatly reduce the length of time in comparison with a conventional apparatus in which the reproduction operation is started from the beginning. For example, a silent state associated with switching of the recording area during reproduction, that is, interruption of sound can be stopped in a very short time.

[0016] Moreover, according to the magnetic tape reproducing apparatus according to claim 1, in addition to the operation described above, recorded information spacing such between the unrecorded portion songs when the constant-speed search operation start position is unrecorded state Since the high-speed search direction is determined by accurately determining whether it is the tape end space or not, the search in the wrong direction does not occur, and the start of the recorded information is performed more smoothly.

Further, according to the magnetic tape reproducing apparatus according to claim 2, it detects the recording state of the other recording area during reproduction of one of the recording area, upon detection of a tape end space in the recording area in reproduction In addition, the high-speed search operation of the other recording area can be performed in the high-speed search direction determined based on the recording state of the other recording area. The time required to find the information can be further reduced as compared with the magnetic tape reproducing apparatus according to the first aspect .

[0018] Moreover, according to the magnetic tape reproducing apparatus according to claim 2, in addition to the above effects, during the period from the detection of the non-recording portion in the recording area in reproduction until determining the inorganic recording unit as a tape end space Then, the recording state of the other recording area is detected, and the high-speed search direction is determined based on the recording state in the other recording area. Thus, the accuracy of the high-speed search direction is high, and the start of the recording information is performed more smoothly.

[0019]

[0020]

[0021]

[0022]

【Example】

<First Embodiment> Hereinafter, a magnetic tape reproducing apparatus according to an embodiment of the present invention shown in FIGS. 1 to 6 will be described in detail. First, a magnetic tape used in the magnetic tape reproducing device of the present embodiment will be described with reference to FIG.
In FIG. 3, a magnetic tape T records an analog signal.
It has two recording areas called tracks, and each track has two left and right channels L-ch and R-ch, respectively.

Thus, as shown in FIG. 4, such a magnetic tape T is run in contact with the head block HB, and the recorded information such as music is reproduced.
The head block HB includes head elements H1 and H opposed to the left and right channels L-ch and R-ch of the A track.
2 and the left and right channels L-ch and R-c of the B track
h head elements H3 and H4 facing each other, and each head element H1 and H2 serves as an A track head and each head H3 and H4.
H4 constitutes a B track head. The information recorded on track A of the magnetic tape T is read out by the head elements H1 and H2 by running the magnetic tape T in, for example, the left direction in FIG. Are read by the head elements H3 and H4 by traveling in the opposite direction to the A track, that is, rightward in FIG. in short,
Each of the head elements H1 to H4 constitutes information reading means for reading information from the magnetic tape T.

Next, a reproduction control system of the magnetic tape reproducing apparatus of this embodiment will be described with reference to the block diagram of FIG. 1 is a head for A track, 2 is a head for B track, 3 is a reproduction surface changeover switch for selectively guiding signals from both heads 1 and 2 to a head amplifier 4, and 5 is a speaker for signals from the head amplifier 4. Reference numeral 7 denotes an output amplifier for amplifying the drive amplifier 6 until it can be driven. Reference numeral 7 denotes a signal processing circuit for detecting the presence or absence of recording information based on the level of the output signal of the head amplifier 4. When the output signal is equal to or higher than a predetermined level, it is determined as a recording state,
When the level is lower than the predetermined level, it is determined as a no-recording state, and a signal corresponding to the determination result is output.

Reference numeral 8 denotes a tape running control circuit for controlling a running mechanism of the magnetic tape, 9 denotes an operation key unit having various input keys, 10 denotes a reproduction surface changeover switch 3 and an output amplifier 5 in accordance with a signal from the operation key unit 9. And a main control unit for controlling the tape running control circuit 8 and the like.
Is a function of reading and executing a program corresponding to a signal input by a key, a function of obtaining a continuation time of a non-recording portion by the time counter 10a in response to a non-recording state, that is, a non-recording portion detection signal from the signal processing circuit 6, A function of comparing the duration of a non-recording section with a first reference time for determining the interval between music pieces (between recorded information) to determine whether or not it is between music pieces, based on the duration of the non-recording section and the first reference time. A function of comparing the long second duration with the end of the tape to determine whether it is the end or start space, and transmitting a control signal to the tape running control circuit 8 based on the result of comparison between the duration of the non-recording section and the reference time. It has an output function and the like, and is realized mainly by a microcomputer.

As an example of the reference time, it is conceivable that the first reference time is set to about 1.5 seconds and the second reference time is set to about 5 seconds at the tape running speed during reproduction. At the time of high-speed search, a value obtained by converting the previous time for high-speed search based on the relationship between the tape speed at the time of reproduction and the tape speed at the time of high-speed search is used.

Next, the operation of the magnetic tape reproducing apparatus of this embodiment will be described. When the continuous playback of both tracks of the magnetic tape having the recording state as shown in FIG. 5 is input by the key operation of the operation key unit 9, the main control unit 10 reads out the program corresponding to the continuous playback, and the flowchart shown in FIG. Control as follows. In FIG. 5, P1 to P
Reference numeral 9 denotes recorded music information, B1 to B11 denote spaces as non-recording portions (non-recording portions), B1 and B6 denote tape start end spaces, B5 and B11 denote tape end spaces, and other spaces denote recording spaces. Indicates the interval between pieces of information. LT1 to LT4 are leader tapes.

Now, when the reproducing surface selector switch 3 is in the ON state on the side of the A track head 1 and the magnetic tape is
In the case where the vehicle is traveling rightward at a normal speed and the music information P1 of the A track is being reproduced, the signal from the A track head 1
The main control unit 10 repeats the processing of steps F1 and F2 while the music is output from the speaker 6 via the output amplifier 5 and the music.

That is, while the music information P1 is being reproduced, a signal of a predetermined level or more is output from the head amplifier 4, and the signal processing circuit 7 for detecting the presence or absence of the recording information based on this output signal indicates that there is a recording. A determination is made and a recording information detection signal is output. Therefore, the main control unit 10 controls the signal processing circuit 6
Is determined to be a non-recording portion (non-recording portion) based on the recording information detection signal from, and the processing of steps F1 and F2 is repeated.

Eventually, when the reading position of the A track head 1 shifts from the music information P1 of the A track to the space B2 which is a non-recording part, the output signal of the head amplifier 4 becomes lower than a predetermined level, and the signal processing circuit 7 It determines that there is no recording, and outputs a non-recording detection signal. Then, the main control unit 10 determines that the unit is a non-recording unit, shifts to the next step F3, starts time counting by the time counter 10a, and shifts to steps F4 and F6.

Thus, in steps F4 and F6, the determination as to whether or not the duration of the non-recording section exceeds a predetermined time is repeated. At this time, the second reference time is used as the predetermined time.

Since the space B2 is between music pieces, the read position by the A track head 1 is set to the music information P of the A track before the predetermined time (second reference time) elapses.
The main control unit 10 determines that the recording value detection signal has been input from the signal processing circuit 7 before the count value of the time counter 10a has reached the predetermined time, and that the recording apparatus is not in the non-recording state. And step F
After resetting the time count in step 5, the process returns to step F1. Thereafter, while repeating the above processing, A
The music information P2 to P4 on the track are sequentially reproduced.

When the read position by the A track head 1 shifts to the space B5, the main control unit 10
When it is determined that the non-recording section has continued for a predetermined time period by the time count of the time counter 10a, the space B5 is determined as the tape end space, and the process proceeds to the next steps F7 and F8.

In step F7, the main control section 10 instructs the output amplifier 5 to mute, thereby preventing noise or the like from being emitted from the speaker 6 at the time of switching the reproduction surface at the subsequent stage. In the following step F8, the main control unit 10 outputs a switching command signal to the reproduction surface changeover switch 3 to switch the switch 3 to the B track head 2 side, and outputs a switching command signal to the tape running control circuit 8. The control circuit 8 switches the running direction of the magnetic tape to the left in FIG. 5, starts running at a normal speed, and searches for the B track at a constant speed in the terminal direction.

Then, in step F9, the main controller 10 determines the presence or absence of the record information based on the output signal of the signal processing circuit 7. In the magnetic tape having the recording state shown in FIG. 5, since the music information P5 is recorded at the constant speed search start position of the B track, a recording information detection signal is immediately output from the signal processing circuit 7, and accordingly, the recording information detection signal is output. The main control unit 10 determines the high-speed search direction to be the start end direction of the B track, and in the next step F10, outputs a switching command signal to the tape running control circuit 8, and the control circuit 8 changes the running direction of the magnetic tape to the direction shown in FIG. At the same time, the mode is switched to the right, and the magnetic tape is caused to run at a high speed.

In step F11, the main controller 10 instantaneously locates the music information P5 by executing a high-speed search based on the inter-song detection operation based on the first reference time. That is, the read position by the B track head 2 shifts from the music information P5 to the space B6, and the non-recording state detection signal is output from the signal processing circuit 7,
When the time counting by the time counter 10a is started and it is detected that the non-recording portion has continued for the first reference time, the flow shifts to step F14.

In step F14, the main control unit 10 outputs a control signal to the tape running control circuit 8 to switch the running direction of the magnetic tape to the left direction in FIG. Switching from the running to the normal running, the reproduction operation of the B track is started, and the mute OF is output to the output amplifier 5 in the following step H15.
F command signal is output, mute is released, and step F
1 and the music information P5 of the B track is returned.
P9 is sequentially reproduced.

By the way, in the case of the magnetic tape having the recording state shown in FIG. 6, the track B side corresponding to the end of the music information P4 of the track A is in the non-recording state. In response to the output of the non-recording state detection signal from the signal processing circuit 7, it is determined that the recording section is a non-recording section. In the next step F23, the time counter 10a starts time counting, and It detects whether or not the time is continued. At this time, the second reference time is used as the predetermined time to determine whether the non-recorded portion is between music pieces or the tape start space.

As a result, the continuation time of the unrecorded portion is shorter than the predetermined time, the unrecorded portion is determined as a music interval, the high-speed search direction is determined as the start direction of the B track, and step F1 is performed.
Then, the process proceeds to 0, and the same processing as in the previous case is performed.

On the other hand, when the continuation time of the unrecorded portion has reached the predetermined time, the unrecorded portion is determined as the starting end space of the B track, the high-speed search direction is determined as the ending direction of the B track, and the routine goes to step F12. I do. Then, in step F12, the main control unit 10 outputs a control signal to the tape running control circuit 8 to switch the tape running speed to high speed running while keeping the running direction of the magnetic tape to the left in FIG. A high-speed search is started in the end direction of the B track, and in the next step F13, the head of the music information P5 is detected by repeatedly checking whether or not the signal processing circuit 7 outputs a recording information detection signal.

That is, when the reading position by the B track head 2 shifts from the space B6 to the music information P5,
The recording information detection signal is output from the signal processing circuit 7, and the flow shifts to step F14 to start the reproducing operation. In step F14, the main control unit 10 outputs a control signal to the tape running control circuit 8, and the control circuit 8 switches the magnetic tape from high-speed running to normal running, thereby starting a reproducing operation. Thereafter, as in the case of the magnetic tape having the recording state shown in FIG. 5, the music information P5 to P9 on the B track are sequentially reproduced.

As described above, in the magnetic tape reproducing apparatus according to the present embodiment, at the time of continuous reproduction of both tracks of the magnetic tape, the tape end of the A track (or B track) being reproduced based on the duration of the non-recording portion. The detection of the space, that is, the end of the music information of the track A is detected, the track is switched to the other track B (or track A) at that position, the high speed search direction is determined by the constant speed search operation at the normal speed, and the high speed search direction is determined. In order to quickly search for the music information of the B track and start the reproduction operation of the B track, it takes from the end of the reproduction of the music information of one track to the start of the reproduction of the music information of the other track. The time is determined by playing back or fast-forwarding the end of the tape (including the leader tape) of the track being played, and then playing back the other track. A click in comparison from the beginning to the ones to be played can be greatly reduced, it is possible to suppress the sound interruption caused by the switching of the track in a very short period of time.

Furthermore, when switching from one track to the other track, if there is no recording, the high-speed search direction is determined by judging whether the non-recording portion is between music pieces or the tape start space. The accuracy of the search direction is high, and the start of the music information of the track can be quickly performed.

Incidentally, the information reading means in the present invention is the above A
A track head 1, a B-track head 2 and a reproduction surface changeover switch 3 are provided. A state detecting means is provided by a signal processing circuit 7 and a main control unit 10, and a high-speed search means is a tape running control circuit 8. And the main control unit 10 and the like. The main control unit 10
Has a function as a high-speed search direction determining means and an operation switching means in the present invention.

<Second Embodiment> This embodiment is characterized in that in step F11 shown in the flowchart of FIG. 2, the head of the recorded information is detected based on the second reference time. Is different from the first embodiment.

In step F11, the head of the recorded information on the track is detected by a high-speed search in the direction of the beginning of the track. At this time, in the first embodiment, the first reference time, that is, the interval between the recorded information Since the head of the recorded information is detected based on the time for space determination, there is a concern that the following inconveniences may occur.

For example, in the case of a magnetic tape having a recording state as shown in FIG. 7, the end of reproduction of the music information P4 of track A is detected, the track is switched to track B, and the high-speed search direction is determined to be the start direction of track B. Then, a high-speed search is performed in that direction. At this time, since the first reference time is used, the space B7 between the music pieces is erroneously determined as the tape start end space, and as a result, the music information P6 is reproduced. Have concerns.

Therefore, in this embodiment, since the head of the music information is detected based on the second reference time, the space B7 is not erroneously determined as the tape start space, and the earliest music on the track is not determined. The head of the information P5 can be reliably detected, and an effect is provided that the magnetic tape in any recording state can be reproduced from the earliest music information of the track.

In this embodiment, however, the head of the music information is detected based on the second reference time at the time of the high-speed search in the starting direction of the track. When stopping at the head of P5, B
A gap is generated between the reading position of the track head and the head of the music information P5 based on the second reference time. When the reproduction of the B track is started from the stopped state, the silence state caused by the gap is changed. The problem of continuing for a while occurs.

Therefore, in the case of stopping at the beginning of the music information P5 of the track B after the reproduction of the track A, the second
After the head is detected by the reference time, it is desirable to control the magnetic tape to run at a steady speed in a direction opposite to that in the high-speed search, and to stop when the recording information is detected.

<Third Embodiment> In this embodiment, the presence or absence of recorded information on one track of a magnetic tape during reproduction of one track is detected, the tape end space is detected in the track being reproduced, and the other end of the track is detected. At the time of switching to the track, the high-speed search direction is immediately determined based on the detection result of the recording state collected from the track, and the high-speed search is performed in that direction. The time required until the start of the recording information of the other track can be further shortened than in the first embodiment.

FIG. 8 is a block diagram showing a magnetic tape reproducing apparatus according to the present embodiment, and FIG. 9 is a flowchart showing the main part of the apparatus during continuous reproduction. In FIG. 8, parts common to FIG. 1 are denoted by the same reference numerals as in FIG. 1.

In FIG. 8, reference numeral 1 denotes an A track head,
Reference numeral 2 denotes a reproducing head for connecting a B track head to the A track head 1 via a head amplifier 11 and a B track side contact to the B track head 2 via a head amplifier 12. Switch, 5 is an output amplifier, 6 is a speaker, 8 is a tape running control circuit,
Reference numeral 9 denotes an operation key unit, 10 denotes a main control unit, 13 denotes a signal processing circuit which determines whether or not a signal from the head amplifier 11 is higher than a predetermined level and outputs a signal according to the determination result. Is a signal processing circuit that determines whether or not the signal is at or above a predetermined level and outputs a signal according to the determination result.

Next, the operation will be described with reference to the flowchart of FIG. 2 together with the flowchart of FIG. In the present embodiment, the processing contents in which the processing in the broken line frame FB in the flowchart of FIG. 1 is replaced by the flowchart shown in FIG. 9 are executed.

In the case where the magnetic tape having the recording state shown in FIG. 5 is continuously reproduced from track A to track B, the read position by the head 1 for the track A shifts from the music information P4 to the space B5, and the head amplifier 1
1 falls below a predetermined level and the signal processing circuit 1
3 detects a non-recording state and outputs a detection signal,
The main control section 10 determines the non-recording section and determines the time counter 10
While the time count by a is started and thereafter the determination as to whether or not the unrecorded portion continues for a predetermined time is repeated, while the A track being reproduced is not changed until the value of the time counter 10a reaches the predetermined time. The presence / absence of recorded information on the opposite track B is detected.

That is, after no-recording is detected in step F2 and time counting is started in step F3, no-recording is detected in step F4, and the value of the time counter 10a does not reach the predetermined time in step F16. Is determined, the process proceeds to step F20.

In step F20, the main control unit 1
A value of 0 determines whether the signal read by the B track head 2 and amplified by the head amplifier 12 is equal to or higher than a predetermined level, based on a signal from the signal processing circuit 14.
In this case, the music information P5 is recorded on the track B, the main control unit 10 determines that there is recorded information, and
At 22, the value of A is set to “1”. On the other hand, in the case of the magnetic tape having the recording state shown in FIG. 6, since the position on the track B corresponding to the end of the music information P4 on the track A is unrecorded, the value of A is set to "0" in step F21. And Note that the main control unit 10 determines during the detection period that
Once it is determined that there is recorded information and the value of A is rewritten to "1", the value of A is fixed at "1" even if a non-recording part is determined, and rewriting is disabled. .

In short, steps F4, F16, F20, and F2 are performed until the value of the time counter 10a reaches the predetermined time after the detection of the non-recording portion in the track A being reproduced.
By repeatedly performing the processing of 1 (or F22),
The presence / absence of recorded information on the non-playback B track is checked.

When the duration of the non-recording section has reached the predetermined time and the end of the tape has been determined, the main control section 10 proceeds to step F17 to instruct the output amplifier 5 to mute OFF. In step F18, the reproduction surface changeover switch 3 is switched from track A to track B, and in the next step F19, it is determined whether the value of A is "1" or "0".

In the case of the magnetic tape having the recording state shown in FIG. 5, the value of A is "1", so that the high-speed search direction of track B is set to the start direction based on the determination result that there is recorded information. The determination is made, and the routine goes to the next Step F10.
As in the previous embodiment, in step F10, a command signal is output to the tape running control circuit 8 to cause the magnetic tape to run rightward in FIG. 5 at a high speed. In step F11, the signal from the signal processing circuit 14 is output. The cue of the music information P5 is performed based on this.

On the other hand, in the case of a magnetic tape having the recording state shown in FIG. 6, the value of A is "0", so that the high-speed search direction of track B is terminated based on the determination result of no recorded information. The direction is determined, and the process proceeds to the next step 12.
As in the previous embodiment, in step F12, a command signal is output to the tape traveling control circuit 8 to cause the magnetic tape to travel leftward at a high speed in FIG. 6, and in step F13, the signal from the signal processing circuit 14 is output. The head of the music information P5 is detected based on this.

In this embodiment, the first
And, as in the second embodiment, the reproduction surface, that is, the track is switched by detecting the tape end space of the track being reproduced, and the other track is searched at a constant speed. The time required for the constant-speed search can be omitted, and the silent state due to track switching during continuous reproduction, that is, the time of sound interruption can be further reduced.

In each of the above embodiments, the operation for continuously reproducing the music information recorded on the two tracks has been described. However, the present invention is directed to reproducing the music information recorded on one track. After that, the present invention can also be applied to a case where the playback is stopped at the time when the cue of the music information or the like recorded on the other track is performed. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and it is needless to say that the present invention can be practiced by appropriately modifying the embodiment without departing from the scope of the invention.

[0064]

As described above, according to the first aspect of the present invention, a tape end space is detected in a recording area being reproduced, and a constant speed search is performed in the end direction of the other recording area on the non-reproduction side. The operation is started from the same position as the reproduction end position of the recording area being reproduced, and the high-speed search direction is determined based on the recording state detected by the constant-speed search operation, and the magnetic tape is moved in the determined high-speed search direction. By performing high-speed running and cueing the recording information, the time required from the end of reproduction of the recording information in one recording area to the cueing of the recording information in the other recording area is once until the end of the recording area being reproduced. After fast-forwarding or reproducing, the time can be greatly reduced as compared with the conventional apparatus in which the reproducing operation is started from the beginning of the other recording area. Les extremely short time can stop General Domel and it is possible to provide a practically excellent magnetic tape player.

Further , when the constant-speed search operation start position is in a non-recording state, the high-speed search direction is determined by accurately determining whether the non-recording portion is a space between recording information such as between music pieces or a tape end space. The search for the recorded information can be performed more smoothly without searching in the wrong direction, and a more excellent magnetic tape reproducing apparatus can be provided.

According to the second aspect of the present invention, when the recording state of the other recording area is detected while reproducing the one recording area, and when the tape end space is detected in the recording area being reproduced, the other state is detected. The high-speed search operation of the other recording area can be executed in the high-speed search direction determined based on the recording state of the recording area, and the constant-speed search operation in claim 1 can be omitted to further reduce the time. Thus, a more useful magnetic tape reproducing device can be provided.

In addition, during the period from the detection of a non-recording part in the recording area being reproduced to the determination of the non-recording part as a tape end space, the recording state of the other recording area is detected, and based on the recording state during that period. Since the high-speed search direction is determined, the accuracy of the high-speed search direction can be improved, and the search time can be reduced.

[0068]

[0069]

[Brief description of the drawings]

FIG. 1 is a block diagram showing a magnetic tape reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart at the time of continuous reproduction in the apparatus.

FIG. 3 is an explanatory view of a magnetic tape used in the apparatus.

FIG. 4 is a diagram showing a relationship between a magnetic tape and a head block in the apparatus.

FIG. 5 is an explanatory diagram showing an example of a recording state of a magnetic tape.

FIG. 6 is an explanatory view showing another example of the recording state of the magnetic tape.

FIG. 7 is an explanatory diagram showing another different example of the recording state of the magnetic tape.

FIG. 8 is a block diagram showing a magnetic tape reproducing apparatus according to another embodiment of the present invention.

FIG. 9 is a flowchart of a main part at the time of continuous reproduction in the same device.

[Explanation of symbols]

 Reference Signs List 1 head for A track 2 head for B track 3 reproduction surface changeover switch 4, 11, 12 head amplifier 5 output head 6 speaker 7, 13, 14 signal processing circuit 8 tape running control circuit 10 main control unit T magnetic tape H1 to H4 Head element

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-59-207040 (JP, A) JP-A-5-89564 (JP, A) JP-A-56-65377 (JP, A) JP-A-62 33353 (JP, A) JP-A-62-38546 (JP, A) JP-A-62-184645 (JP, A) JP-A-58-10236 (JP, U) JP-A-1-151429 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 15/087 102 G11B 15/02 319

Claims (2)

(57) [Claims] A magnetic tape having two recording areas extending in a longitudinal direction and parallel to each other; a tape running means for reciprocating the magnetic tape; and a tape running means for running the magnetic tape in both recording areas of the magnetic tape. Information reading means for selectively reading recorded information; detecting a non-recording portion on a recording area of the magnetic tape being reproduced by an output signal of the information reading means to obtain a duration of the non-recording portion; A state detecting means for detecting a recording state of a recording area being reproduced based on the duration; and a state in which the state detecting means detects a tape end space in a reproducing operation of one recording area of the magnetic tape. Is switched from the reproducing operation of the recording area to the constant-speed search operation toward the end of the other recording area, and the constant-speed search operation of the other recording area is reproduced first. Operation switching means for starting from the same position as the reproduction end position of the area, and high-speed search direction determining means for determining a high-speed search direction based on an output signal of the state detection means at the beginning of the constant-speed search of the other recording area. while the magnetic tape at a high speed travel on the determined speed search direction by the fast search direction determination section, Ru and a high speed search device for performing the beginning of the record information based on the output of the state detecting means, the high-speed The search direction determining means is provided by the state detecting means.
As a result, the constant speed search operation start position is
Determines the high-speed search direction to the start of the recording area
If the constant speed search operation start position is in the non-recording state,
Judgment of space between recording information determined by state detection means
Compare the reference time longer than the usage time with the duration of the unrecorded area
And detecting a non-recording portion longer than the reference time.
To determine the high-speed search direction as the end direction of the recording area.
High speed with detection of blank area shorter than the reference time
A magnetic tape reproducing apparatus, wherein a search direction is determined to be a start direction of a recording area . 2. Two mutually parallel recordings extending in the longitudinal direction.
A magnetic tape having a recording area, a tape running means for reciprocating the magnetic tape, and both recordings on the magnetic tape while running the magnetic tape.
Selectively read information recorded in each area
Information reading means and an output signal of the information reading means for both of the magnetic tape
The non-recording part on the recording area is detected and the duration of the non-recording part is determined.
And determine the recording state of the recording area based on the duration.
State detecting means for performing the above operation in reproducing the one recording area of the magnetic tape.
The recording state detecting means detects the tape end space of the recording area being reproduced.
When a non-playback side is detected,
High-speed search that determines the high-speed search direction based on the recording state
Direction determining means, and a high-speed search determined by the high-speed search direction determining means.
The magnetic tape is run at high speed in the direction
High-speed server that performs cueing of recorded information based on the output of a stage
In the reproducing operation of one recording area of the magnetic tape.
The recording state detecting means detects the tape end space of the recording area being reproduced.
The playback operation of one of the recording areas
The high-speed search of the other recording area by the high-speed search means
Switch operation, and high-speed search operation of the other recording area
Is the same as the playback end position of one of the recording areas that was played first.
And a high-speed search direction determining means.
As a result of the detection,
Until the non-recorded part is determined as the tape end space
Recorded information in the other recording area on the non-playback side during
Is detected, the high-speed search direction is set to the beginning of the recording area.
High-speed search when no record information is detected
The direction is determined to be the end direction of the recording area.
Magnetic tape playback device.