JPH06302050A - Magnetic tape reproducing device - Google Patents

Abstract

PURPOSE:To shorten the time from finishing reproducing to program searching on a track on the other side by detecting nonrecorded part on a recorded area under reproducing, detecting an end space of the tape from a duration time of this nonrecorded part, traveling the tape at a high speed and performing program searching on the other side track. CONSTITUTION:Continuous reproducing both A and B side tracks of the magnetic tape is inputted by key operation of an operating key part 9. Reproducing a specified surface of the A track and a duration time of a nonrecorded part are detected by control of a main control part 10. Time counting is started by the control part 10 with a time counter 10a, and whether or not the nonrecorded part lasts for a prescribed time is decided. When the nonrecorded part does not attain the prescribed time, the existence of recording information on the A track under reproducing and the B track on the other side is detected. The nonrecorded part on the reproducing surface is detected. When the value of the counter 10a reaches a prescribed value after detecting the nonrecorded part, and the end space of the tape is detected, a command signal is outputted to a control circuit 8 to travel the magnetic tape at a high speed, and program searching in music information is performed based on a signal from a signal processing circuit 7.

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,
In particular, 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 reproducing operation of the other recording area.

[0002]

2. Description of the Related Art Conventionally, in a device for reproducing a magnetic tape having two tracks extending in the longitudinal direction and parallel to each other, a device for automatically switching from a reproducing operation of one track to a reproducing operation of the other track is as follows. There was something like that.

For example, even when the reproduction of the information recorded on the track is completed during the reproduction of the A track, the non-recorded portion (including the leader tape) is reached up to the end of the A track.
Apparatus for executing the reproducing operation of A and executing the reproducing operation from the starting end on the B track side after the end is detected, or for example, the A track being reproduced by detecting the tape end space by the length of the unrecorded portion after the recorded information. Has been already commercialized, in which the reproduction operation is started from the start end of the B track after fast-forwarding to the end.

[0004]

However, in the former method described above, the reproduction of the recorded information on the A track is completed and the B information is reproduced.
It takes at least a time for reproducing the leader tapes of both tracks before the reproduction of the recorded information on the tracks is started, and there is a non-recorded portion, that is, a space where no information is recorded at the end of the A track or the start of the B track. In this case, a longer time is required, and there is a problem that a long silence state occurs when the tracks are switched.

In the latter method, the time can be shortened by the amount that the leader tape of the A track and the end space can be fast-forwarded, but the waste of time is required to reproduce the leader tape of the B track and the start space. It takes a long time from the end of reproduction of the record information of the A track to the start of reproduction of the record information of the B track.

The present invention has been made for the purpose of solving 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 having a magnetic tape having two recording areas extending in the longitudinal direction and parallel to each other, and a tape running means for running the magnetic tape back and forth. An information reading means for selectively reading information recorded in both recording areas of the magnetic tape while the magnetic tape is running, and an output signal of the information reading means for reproducing information on the recording area during reproduction of the magnetic tape. In the reproducing operation of one recording area of the magnetic tape, the status detecting means for detecting the recording area to obtain the duration of the non-recording area, and detecting the recording state of the recording area being reproduced based on the duration. When the state detecting means detects the tape end space, the reproduction operation of one recording area is switched to the constant speed search operation toward the end of the other recording area. Operation switching means for starting the constant-speed search operation of the recording area from the same position as the reproduction end position of the one recording area previously reproduced, and the output signal of the state detecting means at the beginning of the constant-speed search of the other recording area. A high-speed search direction determining means for determining a high-speed search direction based on the above, and the magnetic tape is run at a high speed in the high-speed search direction determined by the high-speed search direction determining means, and based on an output signal of the state detecting means And a high-speed search means for executing a cue.

Further, in the magnetic tape reproducing apparatus according to a second aspect of the present invention, the high speed search direction determining means according to the first aspect is high speed if the constant speed search operation start position is a recording state as a result of detection by the state detecting means. If the search direction is determined to be the start direction of the recording area, and if the constant speed search operation start position is in the non-recording state, the high-speed search direction is set to the start direction or the end direction of the recording area based on the duration of the non-recording area. It shall be decided.

Further, in a magnetic tape reproducing apparatus according to a third aspect of the present invention, when the constant speed search start position is in a non-recording state as a result of detection by the state detecting means of the high speed search direction determining means according to the second aspect, The state detection means compares the reference time longer than the predetermined time for determining the space between recorded information with the duration of the non-recording portion, and detects the non-recording portion longer than the reference time, and the high-speed search direction is the recording area. It is assumed that the high-speed search direction is determined as the start end direction of the recording area in accordance with the detection of the non-recorded portion shorter than the reference time.

In the magnetic tape reproducing apparatus according to claim 4,
A magnetic tape having two recording areas extending in the longitudinal direction and parallel to each other, tape running means for running the magnetic tape back and forth, and information recorded in both recording areas of the magnetic tape while running the magnetic tape. And the non-recorded portions on both recording areas of the magnetic tape are detected by the output signal of the information reading means and the duration of the non-recorded portions is obtained. State detecting means for detecting a recording state and the other recording area on the non-reproducing side when the state detecting means detects the tape end space of the recording area being reproduced in the reproducing operation of one recording area of the magnetic tape. The high speed search direction determining means for determining the high speed search direction based on the recording state of the magnetic field, and the magnetic field in the high speed search direction determined by the high speed search direction determining means. A high-speed search means for running the tape at a high speed to find the recorded information based on the output signal of the state detecting means, and a recording area being reproduced by the state detecting means in the reproducing operation of one recording area of the magnetic tape. When the tape end space is detected, the reproduction operation of one recording area is switched to the high speed search operation of the other recording area by the high speed search means, and the high speed search operation of the other recording area is reproduced first. And an operation switching means for starting from the same position as the reproduction end position of the recording area.

According to a fifth aspect of the magnetic tape reproducing apparatus, the high speed search direction determining means according to the fourth aspect detects the non-recorded portion of the storage area being reproduced as a result of the detection by the state detecting means. When recording information is detected in the other recording area on the non-playback side before the non-recording area is determined as the tape end space, the high-speed search direction is determined to be the starting end direction of the recording area and no recording information is detected. At this time, the high-speed search direction is determined to be the end direction of the recording area.

According to a sixth aspect of the magnetic tape reproducing apparatus,
The state detecting means according to claim 1 or 4 sets a reference time longer than a predetermined time for determining a space between recording information when performing a high speed search in a starting end direction of a recording area, and based on this reference time It is configured to cue recorded information.

According to a seventh aspect of the present invention, there is provided the magnetic tape reproducing apparatus according to the sixth aspect, wherein the high speed search means records the recorded information based on the reference time during the high speed search in the direction of the start end of the recording area. When the head of the magnetic tape is detected, the magnetic tape is switched to the normal running in the direction opposite to the high-speed search direction, and the cue correction operation is executed.

In the magnetic tape reproducing apparatus according to claim 8,
According to the first or fourth aspect of the present invention, after the recorded information is cued by the high-speed search means, the magnetic tape is switched from high-speed running to normal running and the reproducing operation is automatically started.

[0015]

According to the magnetic tape reproducing apparatus of the present invention, when the tape end space is detected in the recording area being reproduced, the constant speed search is performed in the end direction of the other recording area on the non-reproducing side. The operation is started from the same position as the reproduction end position of the recording area that was being reproduced, the high-speed search direction is determined based on the recording state detected by this constant-speed search operation, and the determined high-speed search direction is set. The recorded information is cued by running the magnetic tape at high speed. Therefore,
The time required from the end of reproduction of the recorded information in one recording area to the beginning of the recorded information in the other recording area is such that after fast-forwarding or reproducing to the end of the recording area being reproduced, reproduction from the beginning of the other recording area is performed. Compared with the conventional device that starts the operation, the time can be greatly shortened, and, for example, the silent state, that is, the sound break due to the switching of the recording area being reproduced can be stopped in a very short time.

Moreover, according to the magnetic tape reproducing apparatus of the second and third aspects, in addition to the above-mentioned operation, when the constant speed search operation start position is in the non-recording state, the non-recording portion causes a gap between tracks or the like. Since the high-speed search direction is determined by accurately determining whether the space between recorded information or the tape end space, the recorded information can be cued more smoothly without searching in the wrong direction.

Further, according to the magnetic tape reproducing apparatus of the fourth and fifth aspects, the recording state of the other recording area is detected during reproduction of one recording area, and the tape end space in the recording area being reproduced. When detecting the, it is possible to perform a high-speed search operation of the other recording area in the high-speed search direction determined based on the recording state of the other recording area,
It is possible to further shorten the time required from the end of reproduction of the record information in one recording area to the beginning of the record information in the other recording area, as compared with the magnetic tape reproducing apparatus according to any one of claims 1 to 3. Becomes

Further, according to the magnetic tape reproducing apparatus of the fifth aspect, in addition to the above operation, from the detection of the non-recorded portion in the recording area being reproduced to the determination of the non-recorded portion as the tape end space. Since the recording state of the other recording area is detected and the high-speed search direction is determined based on the recording state between them, the accuracy of the high-speed search direction is high, and the heading of the recorded information is performed more smoothly.

According to the magnetic tape reproducing apparatus of the sixth and seventh aspects, in addition to the operation of the magnetic tape reproducing apparatus of the first or fourth aspect, at the time of high-speed search in the starting end direction of the recording area, Since the recorded information is cued at a reference time that is longer than the time for determining the space between recorded information, there is no recorded area as a space between recorded information in the middle, and the wrong judgment is made without making an erroneous judgment. It is possible to reliably find the beginning of the recorded information.

Further, according to the magnetic tape reproducing apparatus of the seventh aspect, in addition to the above operation, after the reproduction of one recording area is completed, the recording information is stopped at the head of the earliest recorded information in the other recording area. This is especially effective in the case.

According to the magnetic tape reproducing apparatus of the eighth aspect, in addition to the operation of the magnetic tape reproducing apparatus of the first or fourth aspect, the sound accompanying the switching of the recording areas during continuous reproduction of both recording areas is produced. It is possible to suppress the break as short as possible.

[0022]

【Example】

<First Embodiment> The magnetic tape reproducing apparatus according to the first embodiment of the present invention shown in FIGS. 1 to 6 will be described in detail below. First, a magnetic tape used in the magnetic tape reproducing apparatus of this embodiment will be described with reference to FIG.
In FIG. 3, a magnetic tape T is an analog signal recorded, and has A tracks and B extending in the longitudinal direction and parallel to each other.
It has two recording areas called tracks, and each track has two left and right channels L-ch and R-ch.

As shown in FIG. 4, the magnetic tape T is run while being in contact with the head block HB, and the information such as recorded music is reproduced.
The head block HB includes head elements H1 and H facing 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
Head elements H3, H4 facing h are provided, and each head element H1, H2 is an A track head, and each head H3, H4.
H4 constitutes each B track head. The information recorded on the track A of the magnetic tape T is read by the head elements H1 and H2 by moving the magnetic tape T to the left in FIG. 4, and the information recorded on the track B is recorded on the magnetic tape T. Is read by the head elements H3 and H4 by traveling in the direction opposite to that of the A track, that is, in the right direction 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, the reproduction control system of the magnetic tape reproducing apparatus of this embodiment will be described with reference to the block diagram of FIG. Reference numeral 1 is a head for A track, 2 is a head for B track, 3 is a reproducing surface changeover switch for selectively guiding signals from both heads 1 and 2 to a head amplifier 4, and 5 is a speaker for a signal from the head amplifier 4. 6 is an output amplifier for amplifying until it can be driven, and 7 is 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. This signal processing circuit 7 is When the output signal is above a certain level, it is judged as a recording state,
When it is lower than a predetermined level, it is judged as a non-recording state and a signal according to the judgment result is output.

Reference numeral 8 is a tape running control circuit for controlling the running mechanism of the magnetic tape, 9 is an operation key section having various input keys, and 10 is a reproducing surface changeover switch 3 and an output amplifier 5 according to a signal from the operation key section 9. And a main controller 10 for controlling the tape running control circuit 8 and the like.
Is a function of reading and executing a program corresponding to a key input signal, a function of obtaining a duration of the non-recording portion by the time counter 10a in response to a non-recording state from the signal processing circuit 6, that is, a non-recording portion detection signal, A function of comparing the duration of the non-recorded portion with the first reference time for determining the inter-song (recording information) to determine whether it is the inter-song, based on the duration of the non-recorded portion and the first reference time A function to determine whether the tape is the end space or the start end space by comparing with a long second duration, and a control signal to the tape running control circuit 8 based on the result of comparison between the duration of the non-recording portion and the reference time. It has a function of outputting and is mainly realized by a microcomputer.

As an example of the above 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 in 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 is used based on the relationship between the tape speed at the time of reproduction and the tape speed at the time of high speed search.

Next, the operation of the magnetic tape reproducing apparatus of this embodiment will be described. When the continuous reproduction 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 the program corresponding to the continuous reproduction, and the flowchart shown in FIG. Control like. In FIG. 5, P1 to P
Reference numeral 9 is recorded music information, B1 to B11 are spaces which are non-recording portions (non-recording portions), B1 and B6 are tape starting spaces, B5 and B11 are tape ending spaces, and other spaces are recorded. It indicates a piece of music that is information. Further, LT1 to LT4 are leader tapes.

Now, when the reproducing surface changeover switch 3 is in the ON state on the A track head 1 side, the magnetic tape is shown in FIG.
In the case where the vehicle is traveling to the right at the normal speed and reproducing the music information P1 of the A track, the signal from the A track head 1 is reproduced by the reproduction surface changeover switch 3 and the head amplifier 4.
While being output as music from the speaker 6 through the output amplifier 5 and the output amplifier 5, the main control unit 10 repeats the processing of steps F1 and F2.

That is, during reproduction of the music information P1, a signal of a predetermined level or higher is output from the head amplifier 4, and the signal processing circuit 7 for detecting the presence / absence of recorded information based on this output signal indicates that there is recording. The determination is made and the recording information detection signal is output. Therefore, the main controller 10 controls the signal processing circuit 6
It is judged from the recording information detection signal from the non-recording portion (non-recording portion) that the processing of steps F1 and F2 is repeated.

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

Then, in steps F4 and F6, it is repeated to determine whether or not the duration of the non-recording portion exceeds the predetermined time. The second reference time is used as the predetermined time at this time.

Since the space B2 is a space between songs, the read position by the A track head 1 is the music information P of the A track before a predetermined time (second reference time) elapses.
2, the main control unit 10 is not in the non-recording state because the recording information detection signal is input from the signal processing circuit 7 before the count value of the time counter 10a reaches the predetermined time. And step F
After resetting the time count in 5, the process returns to step F1. After that, repeat the above process to A
The music information P2 to P4 on the track will be sequentially reproduced.

When the read position of the A track head 1 moves to the space B5, the main controller 10
When the time count of the time counter 10a determines that the non-recording portion has continued for a predetermined time, the space B5 is determined to be the tape end space, and the process proceeds to the next steps F7 and F8.

In step F7, the main control unit 10 commands the output amplifier 5 to be muted to prevent noise or the like from being emitted from the speaker 6 when switching the reproduction surface in the subsequent stage. In the following step F8, the main control unit 10 outputs a switching command signal to the reproducing surface switching switch 3 to switch the switch 3 to the B track head 2 side and also 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 the normal speed, and searches the B track at the constant speed in the end 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, the signal processing circuit 7 immediately outputs the recording information detection signal, and accordingly. The main control unit 10 determines the high-speed search direction to be the start direction of the B track, and in the next step F10, outputs a switching command signal to the tape running control circuit 8 to cause the control circuit 8 to set the running direction of the magnetic tape. At the same time, the magnetic tape is switched to the right direction and the magnetic tape is run at a high speed, and the process moves to the high speed search of step F11.

In step F11, the main control unit 10 instantaneously locates the music information P5 by executing a high-speed search by the inter-track detection operation based on the first reference time. That is, as the read position of 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 count by the time counter 10a is started and it is detected that the unrecorded portion continues for the first reference time, the process proceeds to step F14.

In step F14, the main controller 10 outputs a control signal to the tape running control circuit 8 to switch the running direction of the magnetic tape to the left in FIG. 5 and to increase the tape running speed. After switching from running to normal running, the reproduction operation of the B track is started, and in the subsequent step H15, the output amplifier 5 is muted OF.
F command signal is output, mute is released, and step F
It will be returned to 1 and the music information P5 of the B track
P9 will be sequentially reproduced.

By the way, in the case of the magnetic tape having the recording state shown in FIG. 6, since the B track side corresponding to the end of the music information P4 of the A track is in the non-recording state, when the process proceeds to step F9, the main controller 10 In response to the output of the non-recording state detection signal from the signal processing circuit 7, the non-recording section is determined, and in the next step F23, the time counter 10a starts time counting and the non-recording section is predetermined. Detects whether to continue for a time. It should be noted that the second reference time is used as the predetermined time at this time to determine whether the non-recording portion is a space between songs or a tape start end space.

As a result, the duration of the non-recording portion is shorter than the predetermined time, the non-recording portion is judged as the music interval, the high speed search direction is determined to be the starting end direction of the B track, and step F1
The processing shifts to 0, and the same processing as the above case is performed.

On the other hand, when the duration of the non-recording portion reaches the predetermined time, the non-recording portion is judged as the start end space of the B track, the high speed search direction is determined to be the end direction of the B track, and the process proceeds to step F12. To 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 leftward in FIG. A high-speed search in the direction toward the end of the B track is started, and the head of the music information P5 is detected by repeatedly checking whether or not the recording information detection signal is output from the signal processing circuit 7 in the next step F13.

That is, when the read 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 process proceeds to step F14 to start the reproducing operation. In step F14, the main controller 10 outputs a control signal to the tape running control circuit 8 to switch the magnetic tape from high speed running to normal running by the control circuit 8 to start the reproducing operation. Thereafter, similar to the magnetic tape having the recording state shown in FIG. 5, the music information P5 to P9 on the B track is 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. Detecting a space, that is, detecting the end of the music information of the A track, switching to the other B track (or A track) at that position, determining the high speed search direction by the constant speed search operation at the normal speed, and determining the high speed search direction High-speed search is performed to instantly find the music information of the B track and the reproduction operation of the B track is started. Therefore, it is required 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. Time is played or fast-forwarded to the end of the tape end space (including leader tape) of the track being played, and then 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.

In addition, when one track is switched to the other track and if there is no recording, the high-speed search direction is determined by determining whether the non-recording portion is a space between tracks or a tape start end space. The accuracy of the search direction is high, and it is possible to quickly find the music information of the track.

The information reading means in the present invention is the above-mentioned A.
It is composed of a track head 1, a B track head 2 and a reproducing surface changeover switch 3, a state detecting means is composed of a signal processing circuit 7 and a main control section 10, and a high speed searching means is a tape running control circuit 8. And the main control unit 10 and the like. In addition, the main control unit 10
Has a function as high-speed search direction determining means and operation switching means in the present invention.

<Second Embodiment> This embodiment is characterized in that in step F11 shown in the flow chart of FIG. 2, the head of recorded information is detected based on the second reference time. Only in the first embodiment 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 track start direction. At this time, in the first embodiment, the first reference time, that is, the interval between the recorded information, is detected. Since the head of recorded information is detected based on the time for space determination, there is a concern that the following inconvenience 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 on the A track is detected and the side is switched to the B track side, and the high speed search direction is determined to be the starting end direction of the B track. Then, a high speed search is performed in that direction, but at this time, since the first reference time is used, the space B7 between the songs is erroneously determined as the tape start space, and the result is reproduced from the music information P6. There is a concern that

Therefore, in this embodiment, since the head of the music information is detected based on the second reference time, the space B7 is not mistakenly determined as the tape start space, and the earliest music of the track concerned is detected. The head of the information P5 can be reliably detected, and 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 on the basis of the second reference time during the high-speed search in the track start direction. Therefore, for example, after the reproduction of the A track, the music information of the B track is reproduced. When stopping at P5's head, B
A gap based on the second reference time occurs between the read position of the track head and the head of the music information P5, and when the reproduction of the B track is started from the stopped state, the silent state due to the gap is generated. The problem arises of continuing for a while.

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

<Third Embodiment> In this embodiment, the presence or absence of recorded information on the other track is detected during reproduction of one track of the magnetic tape, the tape end space is detected in the track being reproduced, and the other end 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, from the end of the reproduction of the recorded information of one track. The time required to start the recorded information on the other track can be further shortened as compared with the first embodiment.

FIG. 8 is a block diagram showing the magnetic tape reproducing apparatus in this embodiment, and FIG. 9 is a flow chart of the main part of the same apparatus during continuous reproduction. In FIG. 8, the same parts as those in FIG. 1 are designated by the same reference numerals.

In FIG. 8, 1 is a head for A track,
Reference numeral 2 is a B track head, 3 is a reproduction surface switching in which the A track side contact is connected to the A track head 1 via the head amplifier 11, and the B track side contact is connected to the B track head 2 via the head amplifier 12, respectively. A switch, 5 is an output amplifier, 6 is a speaker, 8 is a tape running control circuit,
9 is an operation key unit, 10 is a main control unit, 13 is a signal processing circuit that determines whether or not the signal from the head amplifier 11 is above a predetermined level and outputs a signal according to the determination result, and 14 is from the head amplifier 12 Is a signal processing circuit that determines whether or not the signal of is equal to or higher than 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 with the processing shown in the flowchart of FIG. 9 are executed.

When the magnetic tape having the recording state shown in FIG. 5 is continuously reproduced from the A track to the B track, the read position by the A track head 1 is now shifted from the music information P4 to the space B5, and the head amplifier 1 is read.
The signal from 1 drops below a predetermined level, and the signal processing circuit 1
When 3 detects the non-recording state and outputs the detection signal,
The main control unit 10 judges the non-recording part and determines the time counter 10
While the time count by a is started and thereafter whether or not the non-recording portion continues for a predetermined time is repeatedly determined, the track A which is being reproduced until the value of the time counter 10a reaches the predetermined time. The presence / absence of recorded information on the B track side on the opposite side is detected.

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

In step F20, the main controller 1
0 is read by the B track head 2 and it is determined whether or not the signal amplified by the head amplifier 12 is equal to or higher than a predetermined level based on the signal from the signal processing circuit 14.
In this case, the music information P5 is recorded on the B track, and the main control unit 10 determines that there is recorded information, and the step F
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 B track side corresponding to the end of the music information P4 of the A track is unrecorded, the value of A is set to "0" in step F21. And In addition, the main control unit 10 during the detection period,
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 the non-recording portion is subsequently determined, and rewriting is disabled. .

In short, steps F4, F16, F20, and F2 are performed until the value of the time counter 10a reaches a predetermined time after the non-recording portion is detected in the track A being reproduced.
By repeating the processing of 1 (or F22),
Whether or not there is recorded information on the B track on the non-playback side is checked.

When the main control section 10 determines that the duration of the non-recording section has reached the predetermined time and is the tape end space, the main control section 10 shifts to step F17 to instruct the output amplifier 5 to mute OFF, and subsequently. In step F18, the reproduction surface changeover switch 3 is switched from the A track side to the B track side, 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". Therefore, the high speed search direction of the B track is set to the start end direction based on the determination result that there is recorded information. The determination is made, and the process proceeds to the next Step F10.
Similar to the previous embodiment, in step F10, a command signal is output to the tape running control circuit 8 to run the magnetic tape at a high speed in the right direction in FIG. 5, and in step F11, a signal from the signal processing circuit 14 is output. Based on this, the music information P5 is cued.

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

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

In each of the above embodiments, the operation of continuously reproducing the music information recorded on the two tracks has been described, but the present invention reproduces the music information recorded on one track. After that, the present invention can also be applied to a case where the music information recorded on the other track is stopped at the time of cueing. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and it is needless to say that the present invention can be appropriately modified and implemented without departing from the scope of the invention.

[0064]

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

According to the second and third aspects of the present invention, in addition to the effect of the first aspect of the invention, when the constant speed search operation start position is in the non-recording state, the non-recording portion causes a gap between tracks or the like. Since the high-speed search direction is determined by accurately determining whether the space between recorded information or the tape end space, the recorded information can be cueed more smoothly without searching in the wrong direction. It is possible to provide a magnetic tape reproducing device.

According to the invention described in claim 4, when the recording state of the other recording area is detected during reproduction of one recording area and the tape end space is detected in the recording area during reproduction, the other It is possible to execute the high speed search operation of the other recording area in the high speed search direction determined based on the recording state of the recording area, and to further shorten the time by omitting the constant speed search operation in claim 1. Therefore, a more useful magnetic tape reproducing device can be provided.

According to the invention of claim 5, in addition to the effect of the invention of claim 4, from the detection of the non-recorded portion in the recording area being reproduced to the determination of the non-recorded portion as the tape end space. During this period, the recording state of the other recording area is detected, and the high-speed search direction is determined based on the recording state during that period, so that the accuracy of the high-speed search direction can be increased and the search time can be shortened. be able to.

According to the sixth and seventh aspects of the present invention, in addition to the effect of the first or fourth aspect of the present invention, the recording information space determination is performed at the time of high-speed search in the starting end direction of the recording area. Since the recorded information is cueed with a reference time that is longer than the time, there is no erroneous judgment when there is a non-recorded portion as a space between recorded information in the middle, and therefore the recorded information head of the earliest recorded area is recorded. There is an effect that it can be taken out reliably.

According to the invention described in claim 8, in addition to the effect of the invention described in claim 1 or 4, the sound interruption caused by the switching of the recording areas during continuous reproduction of both recording areas is minimized. The effect that can be suppressed to.

[Brief description of 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 for continuous playback in the same device.

FIG. 3 is an explanatory diagram of a magnetic tape used in the device.

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

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

FIG. 6 is an explanatory diagram 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 device 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]

 1 Head for A track 2 Head for B track 3 Playback 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

Claims (8)

[Claims] 1. A magnetic tape having two recording areas which extend in the longitudinal direction and are parallel to each other, tape running means for running the magnetic tape back and forth, and both recording areas of the magnetic tape while running the magnetic tape. Information reading means for selectively reading the recorded information, and an output signal of the information reading means for detecting a non-recorded portion on a recording area of the magnetic tape being reproduced to obtain a duration of the non-recorded portion. A state detecting means for detecting a recording state of a recording area being reproduced on the basis of the duration, and one of a state detecting means for detecting a tape end space in a reproducing operation of one recording area of the magnetic tape. Recording operation of the recording area of the other recording area is switched to the constant speed searching operation of the other recording area toward the end direction of the other recording area, and the constant speed searching 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 the high speed search direction based on the output signal of the state detecting means at the beginning of the constant speed search of the other recording area. A high-speed search means for running the magnetic tape at a high speed in the high-speed search direction determined by the high-speed search direction determination means, and for locating the recorded information based on the output signal of the state detection means. Magnetic tape player. 2. The high-speed search direction determining means determines the high-speed search direction to be the starting end direction of the recording area if the constant-speed search operation start position is in a recording state as a result of the detection by the state detecting means, and the constant speed is determined. 2. The magnetic tape reproduction according to claim 1, wherein if the search operation start position is in a non-recording state, the high speed search direction is determined to be the starting end direction or the ending direction of the recording area based on the duration of the non-recording portion. apparatus. 3. The high speed search direction determining means, when the constant speed search start position is in a non-recording state as a result of the detection by the state detecting means, the time for recording information space determination predetermined by the state detecting means is used. By comparing the long reference time with the duration of the non-recording portion and detecting the non-recording portion longer than the reference time, the high-speed search direction is determined to be the end direction of the recording area, and the non-recording portion shorter than the reference time is determined. 3. The magnetic tape reproducing apparatus according to claim 2, wherein the high-speed search direction is determined to be the starting end direction of the recording area upon detection of the. 4. A magnetic tape having two recording areas extending in the longitudinal direction which are parallel to each other, a tape running means for running the magnetic tape back and forth, and both recording areas of the magnetic tape while running the magnetic tape. Information reading means for reading the recorded information, and non-recorded portions on both recording areas of the magnetic tape are detected by the output signal of the information read means to obtain the duration of the non-recorded portions, State detecting means for detecting the recording state of the recording area on the basis of the recording area, and when the state detecting means detects the tape end space of the recording area being reproduced in the reproducing operation of one recording area of the magnetic tape, the non-reproducing side A high speed search direction determining means for determining a high speed search direction based on the recording state of another recording area; and a high speed search direction determined by the high speed search direction determining means. The high-speed search means for running the magnetic tape at high speed in the H direction and executing the heading of the recorded information based on the output signal of the status detection means, and the status detection means in the reproducing operation of one recording area of the magnetic tape. When the tape end space of the recording area being reproduced is detected, the reproduction operation of one recording area is switched to the high speed search operation of the other recording area by the high speed search means, and the high speed search operation of the other recording area is performed. A magnetic tape reproducing apparatus comprising: an operation switching unit for starting the reproduction from the same position as the reproduction ending position of one of the recording areas previously reproduced. 5. The high speed search direction determining means determines whether or not a non-recording portion of the storage area being reproduced is detected as a tape end space as a result of the detection by the state detecting means. When recording information is detected in the other recording area on the reproducing side, the high-speed search direction is determined to be the starting end direction of the recording area, and when the recording information is not detected, the high-speed search direction is determined to be the end direction of the recording area. The magnetic tape reproducing apparatus according to claim 4, wherein 6. The state detecting means sets a reference time which is longer than a predetermined time for determining a space between recording information during a high speed search in a starting end direction of a recording area, and the recording information is recorded based on this reference time. The magnetic tape reproducing apparatus according to claim 1 or 4, wherein the cueing is performed. 7. The high-speed search means, at the time of high-speed search in the direction of the start edge of the recording area, the state detecting means detects the head of the recorded information based on the reference time, so that the magnetic tape is moved at high speed. 7. The magnetic tape reproducing apparatus according to claim 6, wherein the cue correction operation is performed by switching to a constant speed running in a direction opposite to the search direction. 8. The magnetic tape is switched from high speed running to normal running after the recorded information is cued by the high speed search means to automatically shift to a reproducing operation. Magnetic tape player.