JP3147746B2 - Music selection 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 music selecting device for a tape recorder.

[0002]

2. Description of the Related Art As a music selection device of a tape recorder, a music selection device based on inter-music detection using the strength of a signal level has been widely used. Referring to the drawings below,
An example of a music selection device according to the related art will be described. FIG.
FIG. 1 is a block diagram showing an example of a conventional music selection device. FIG.
, The tape traveling system 1 comprises a magnetic tape 11 and a reproducing head 12 and the like, and the reproducing head 12 is installed so that both ends thereof are in contact with the magnetic surface of the magnetic tape 11 wound on a take-up reel and a supply reel, respectively. ing. The reproduction amplifier 2 receives a signal from the reproduction head 12. The output of the reproduction amplifier 2 is input to the comparator 3. The switch element 4 switches the output of the comparison unit 3 to the tune head detection unit 5 or the tune tail detection unit 6 according to a control signal from the mechanism control unit 9 and inputs the same. Ignore time setting part 7
Sets an ignoring time for the tune head detecting unit 5 and the tune detecting unit 6. The mechanism control unit 9 receives inputs from an operation console (not shown), a tune detection unit 5, a tune detection unit 6, and the like, and controls the tape running of the tape running system 1 and the switching of the switch element 4 described above.

[0003] The operation of the conventional music selection device configured as described above will be described below. When the running mode of the tape running system 1 is set by the mechanism control unit 9 to the cue search mode in which the reproducing head runs at a high speed in the reproducing direction with the reproducing head in contact with the magnetic surface of the tape, the magnetic tape 11 is fast-forwarded and the reproducing head 12 Is a magnetic tape 11
, A playback signal at the time of fast forward is output. This signal is amplified by the reproduction amplifier 2 and then compared by the comparator 3 with the internally set reference level. If the signal is higher than this reference level, "H" is output;
Is output. In the cue search mode, the switch element 4 is connected to the tune head detection unit 5 by the control signal of the mechanism control unit 9, so that the tune head detection unit 5 detects the tune head and the output of the comparison unit 3 becomes “L”. The control signal is output to the mechanism control section 9 at the music head position changed from "" to "H". When a tune start signal is input from the tune start detection unit 5, the mechanism control unit 9 outputs a control signal for switching the running mode of the tape running system 1 to, for example, a normal running mode, and switches the running mode of the tape running system 1 to switch the tune. Can be played from the beginning.

Similarly, in a review search mode in which the tape traveling system 1 travels at a high speed in a direction opposite to the reproducing direction while the reproducing head is in contact with the magnetic surface of the tape, the magnetic tape 11 is rewound and the reproducing head 12 is moved. Since it is in contact with the magnetic tape 11, a reproduction signal at the time of rewinding is output. This signal is amplified by the reproduction amplifier 2 and then
The comparator 3 compares the signal with a reference level set internally, and outputs "H" if the signal is larger than the reference level, and outputs "L" if the signal is smaller than the reference level. In the review search mode, since the switch element 4 is connected to the tail detection section 6 by the control signal of the mechanism control section 9, the output signal is detected by the tail detection section 6 and the output of the comparison section 3 becomes “H”. "From"
The control signal is output to the mechanism control section 9 at the end of the track at which the tape is L ". Since the tape position at this time is the end of the track in the rewinding direction, it is at the beginning of the track in the normal running direction. When the tail signal is input from the tail detection unit 6, the mechanism control unit 9 issues a control signal for switching the running mode of the tape running system 1 to, for example, a normal running mode, and switches the running mode, thereby reproducing the music from the beginning of the music. The track can be detected by the review search, the playback starts from the beginning of the song in the normal running mode, and the playback sound of the beginning of the song is changed to 4
If it is not the target song after listening for ~ 5 seconds, if the search search mode is again set to search for the beginning of the song immediately before that song, the end of the same song will be detected again.

In order to prevent this, the track detection by the track detection section 6 is prohibited during the time set by the ignore time setting section 7 after the start of the search mode. Also, at the time of cue search, if playback is stopped and stopped after detecting the beginning of the song,
When stopped, the program starts at the beginning of the song and the beginning of the song is not reproduced. Therefore, in practice, the tape is rewound by an amount corresponding to a few seconds from the beginning of the song, and then the reproduction is run. Therefore, if the track start is detected by the cue search and the playback is run from the track start, the playback starts from the non-signal portion between the tracks.
If it is known that the tune to be reproduced is not the target tune, performing the cue search again to find the beginning of the next tune will detect the beginning of the same tune. In order to prevent this, the ignore time setting unit 7 after the search mode is started
During the time set in (1), the detection of the tune head by the tune head detection unit 5 is prohibited. Therefore, the setting time of the ignoring time setting unit is set to about 5 seconds.

FIG. 4 illustrates the operation of the head detecting section 5, the tail detecting section 6, and the ignoring time setting section 7 in terms of the tape position.
It is. FIG. 4A shows the output of the reproduction amplifier 2. This output signal is compared with a reference level as indicated by a broken line in the comparator 3, so that the output of the comparator 3 is an output as shown in FIG. When the cue search is performed on the magnetic tape recorded in this manner from the position of c of the second music, the output of the comparison unit 3 at that time becomes as shown in FIG.
3 to detect the beginning of a tune by detecting the presence of a tune
The running mode of the tape running system 1 is changed at the position of c1 at the beginning of the music piece. On the other hand, when a review search is performed from the position of d of the second music, the output of the comparison unit 3 at that time becomes as shown in FIG. 4D, and the music tail detection unit 6 detects a music existence → music absence part. The running mode of the tape running system 1 is changed at the position of d1 at the beginning of the second tune to detect the end of the tune.

Next, when a cue search is performed from the position of e between the first and second songs in FIG. 4B, the output of the comparison unit 3 at that time becomes as shown in FIG. The detection unit 5 detects the beginning of the song by detecting the portion of no music → the presence of a song, so that the beginning of the second song is originally detected. However, the detection period of the hatched portion is ignored by the ignore time setting unit 7. Therefore, the head of the tape is detected at the position e1 of the head of the third music, and the running mode of the tape running system 1 is changed. When a review search is performed from the position of f within 5 seconds from the beginning of the third tune in FIG. 4B, the output of the comparison unit 3 at that time becomes as shown in FIG. The end of the third tune is originally detected because the end of the tune is detected by detecting the tune existence → no tune portion at 6, but similarly, the detection period of the hatched portion is ignored by the ignoring time setting unit 7. Therefore, the running mode of the tape running system 1 is changed at the position of f1 at the beginning of the second music piece. In this way, the cue search and the review search can be performed from the middle of a song, between songs, or near the beginning of a song without any inconvenience in actual use. When the cue search is performed from the position g in FIG. 4B after the magnetic tape 11 is rewound to the beginning of the tape, an output waveform as shown in FIG. 4G is obtained. I want the head detection to work, but at this time, if there is a non-signal part more than 5 seconds from the beginning of the tape including the so-called leader tape part, there is no song at the beginning of the first song → the presence of the song can be detected and the first song The running mode of the tape running system 1 can be changed at the position g1 of the tune head.

[0008]

However, in the above-described conventional music selection device, the length of the leader tape portion is as short as 5 seconds or less like a recent magnetic cassette tape, and recording is performed from the beginning of the magnetic tape portion. In the case of such a magnetic tape, as shown in FIG. 4H, the beginning of the first tune is within the set time of the ignoring time setting unit 7, so that the beginning of the first tune cannot be detected and the second tune is not detected. There is a problem that the head of a song is detected at the beginning of the song g2. This is due to the recent increase in the number of tape recorders equipped with an auto-reverse function. Because it is.
To solve this problem, the setting time of the ignoring time setting unit 7 may be set to the ignoring time of 3 seconds necessary for the cue search. In such a case, the ignoring time of the review search is also 3 seconds. Therefore, it is necessary to judge whether or not the music is the target music in three seconds at the beginning of the music, and the convenience is lost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and a magnetic cassette having a leader tape portion length of about 4 seconds like a recent magnetic tape without losing the above convenience at the time of review search. It is an object of the present invention to provide a music selection device that can detect the beginning of a tune at the first tune when a cue search is performed from the beginning of the tape.

[0010]

According to the present invention, there is provided a music selecting apparatus comprising: a tape traveling system; a reproducing amplifier connected to a reproducing head installed in the tape traveling system; A first tune head detection unit for detecting a tune head by changing from no music to a tune presence by an output of the reproduction amplification unit at the time of cue search, and the tape running system at the output of the reproduction amplification unit at the time of review search. A second music head detection unit for performing music head detection based on a change from music presence to music absence, and the first music head detection for a first negligible time set after the tape running system starts cue search. A first ignoring time setting unit for causing the detecting unit to ignore the detection, and causing the second tune head detecting unit to ignore the detection for a second ignoring time set after the tape traveling system starts the review search. Second ignore time setting part and before And a said mechanism switches the driving mode of the tape running system control unit by the output from the first and second bending head detection unit, wherein the first ignored time setting
The first ignoring time of the second unit is the second ignoring time of the second ignoring time setting unit.
Is set to be shorter than the ignoring time .

According to the present invention, the first ignore time setting section sets an optimum ignore time required by the first music piece head detecting section at the time of cue search, while the second music piece at the time of review search. set the optimal ignore time required by the head detection unit in the second ignore time setting unit, in particular leader Te
Cue from the beginning of the tape even if the tape section is short
The head of a tune can be reliably detected during a search.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, there is provided a tape running system, a reproducing amplifier connected to a reproducing head installed in the tape running system, and a cue search system for the tape running system. A first tune head detection unit for detecting a tune start from a no-song to a tune presence according to the output of the playback amplification unit; A second tune head detection unit for detecting a tune head based on a change to nothing, and a detection by the first tune head detection unit for a first negligible time set after the tape traveling system starts cue search. A first ignoring time setting unit for ignoring the search, and a second ignoring for causing the second music head detecting unit to ignore the detection for a second ignoring time set after the tape traveling system starts the review search. A time setting unit and the first and second songs And a said tape running system mechanism control unit for switching the travel mode of the output from the detecting unit, a first ignore time of the first ignoring time setting unit
The second neglecting time setting section sets a shorter time than the second neglecting time.
In the cue search, the first ignoring time setting unit sets the optimum ignoring time required by the first tune head detecting unit, while the second singing head detecting unit sets the optimum ignoring time in the review search. to set the optimal ignore time second ignore time setting unit, thereby it is possible to perform the optimum operation in accordance with the queue search, review the search each situation, especially
Even if the leader tape is short,
To reliably detect the beginning of a song during cue search
It is Ru can.

According to a second aspect of the present invention, there is provided a music selection apparatus for a tape recorder, wherein after a music selection search operation is started, a cue search or a review search is first determined.
In the case of a cue search, the beginning of the music is searched by changing from no music to the presence of the music after the set first neglect time has elapsed, and the mechanism is set to the playback mode. After the second ignoring time longer than the first ignoring time elapses, the tune head is searched by changing from a tune presence to a no tune to switch the mechanism running mode. This corresponds to a case where the first aspect is realized using a microcomputer.

Hereinafter, an embodiment of a music selection device of the present invention will be described in detail with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram of a music selection apparatus according to a first embodiment of the present invention. In FIG. 1, a tape running system 1, a magnetic tape 11, a reproducing head 1
2. The reproduction amplification unit 2, the comparison unit 3, the switch element 4, the tune head detection unit 5, the tune detection unit 6, and the mechanism control unit 9 are configured in the same manner as the prior art example of FIG. Parts having the same function are denoted by the same reference numerals, and detailed description thereof will be omitted. First
The setting unit 7 sets a first ignoring time for the music piece detecting unit 5. The second ignore time setting unit 8 sets a second ignore time for the track detection unit 6.

The operation of the music selection device configured as described above will be described below. When the running mode of the tape running system 1 is the cue search mode, the magnetic tape 11 is fast-forwarded, and the playback head 12 is in contact with the magnetic tape 11, so that a fast-forward playback signal is output. This signal is amplified by the reproducing amplifier 2 and then compared with a reference level set internally by the comparator 3. If the signal is higher than this reference level, “H” is output, and if it is lower, “L” is output. . In the cue search mode, the switch element 4 is connected to the tune head detection unit 5 by the control signal of the mechanism control unit 9, so that the tune head detection unit 5 detects the tune head and the output of the comparison unit 3 becomes “L”. A control signal is output to the mechanism control section 9 at the tune head position changed from "H" to "H" and after the first ignoring time has elapsed.

When a tune start signal is input from the tune start detecting section 5, the mechanism control section 9 issues a control signal for changing the running mode of the tape running system 1 to, for example, a normal running mode, thereby switching the running mode to thereby start the tune. From the vehicle. If necessary, it can be stopped at the beginning of the song. Of course, as in the case of the prior art, when the cue search detects the beginning of the song and then stops and starts playback, when stopped, it is at the beginning of the song and the beginning of the song is not played, so the beginning of the song is actually not played. After rewinding the tape amount corresponding to 2 to 3 seconds from the start, the reproduction traveling is performed.

Similarly, when the running mode of the tape running system 1 is the review search mode, the magnetic tape 11 is rewound, and the reproducing head 12 is in contact with the magnetic tape 11, so that a reproducing signal at the time of rewound is output. This signal is amplified by the reproduction amplifier 2 and then compared by the comparator 3 with a reference level set internally. If the signal is higher than this reference level, "H" is output, and if it is lower, "L" is output.
In the review search mode, since the switch element 4 is connected to the tail detection section 6 by the control signal of the mechanism control section 9, the output signal is detected by the tail detection section 6 and the output of the comparison section 3 becomes “H”. At the end of the track where "L" changed from "",
Further, the control signal is output to the mechanism control unit 9 after the second ignoring time has elapsed. Since the tape position at this time is a tail in the rewinding direction, the tape position is a head position in the normal running direction. Therefore, the tail detecting section 6 may be referred to as a second head detecting section. The mechanism control unit 9 includes the track detection unit 6
When a music tail signal is input from the CPU, a control signal for switching the running mode of the tape running system 1 to, for example, the normal running mode is output to switch the running mode, whereby the playback running from the beginning of the music can be performed. If necessary, it can be stopped at the beginning of the song.

The above operation is the same as the prior art example of FIG. 3 except that the first ignore time and the second ignore time can be set independently. In the same manner, when the track search is detected by the review search and the playback is started in the normal running mode from the beginning of the song and the playback sound of the beginning of the song is heard for 4 to 5 seconds, and the song is not the target song,
When the search search mode is set again to search for the head of the song immediately before the song, the tail of the same song is detected again. In order to prevent this, during the second neglecting time set by the second neglecting time setting unit 8 after the start of the search mode, the music end detection by the music end detecting unit 6 is prohibited. For this reason, the set time of the second ignored time setting unit 8 is set to about 5 seconds. Also, as in the prior art example of FIG. 3, when the head of a tune is detected by cue search and playback is performed from the beginning of the tune, playback starts from a non-signal portion between the tunes. If the cue search is performed again to find the beginning of the next tune when the tune is known, the tune is detected at the beginning of the same tune. In order to prevent this, the music head detection by the music head detection unit 5 is prohibited during the first neglecting time set by the first neglecting time setting unit 7 after the start of the search mode. For this reason, the set time of the first ignore time setting unit is set to about 3 seconds.

As described above, according to the present embodiment, the first ignore time setting unit 7 for setting the first ignore time of the music head detecting unit 5 and the second ignore time of the music track detecting unit 6 are set. The second ignore time setting units 8 are separately provided, so that the optimum ignore time (about 3 seconds) required by the music head detection unit 5 at the time of cue search is set to the first ignore time setting unit 7. In the review search, the second ignoring time setting unit 8 can set the optimum ignoring time (about 5 seconds) required by the music tail detecting unit 6, so that the tune is reproduced and the music is not the target tune. You can perform a review search for the previous song after confirming that the song has been fully read. Song head detection can be performed.

(Embodiment 2) Next, a second embodiment of the music selection apparatus of the present invention will be described in detail with reference to FIG. FIG. 2 is a flowchart in the case where the music selection device according to the second embodiment of the present invention is performed by a microcomputer.
The components corresponding to the switch element 4, the tune head detection unit 5, the tune tail detection unit 6, the first ignored time setting unit 7, the second ignored time setting unit 8, and the mechanism control unit 9 in the first embodiment are implemented by software. This processing is performed by wear, and it is assumed that the configurations of the tape running system 1, the reproduction amplification unit 2, and the comparison unit 3 are the same as those in the first embodiment of FIG.

In FIG. 2, a process 101 is a marker indicating a start position of the cue search and review search processes, and continues to the process 102. The process 102 is for judging the running mode of the tape running system. The process branches to a process 103 at the time of a cue search and to a process 107 at the time of a review search. Processing 1
03 is a judgment as to whether or not the time from the start of the search exceeds T1, and if it is within T1, the processing 103 is performed again.
If it exceeds 1, the flow branches to processing 104. The process 104 is for judging whether or not the output of the comparison unit has changed from no music to music presence. If there is no change, the process 104 is performed again. If there is a change, the process branches to process 105. The process 105 is a process of shifting the mechanism mode to the normal regeneration running, and continues to the process 106 after shifting to the regeneration running. Reference numeral 106 denotes a sign indicating the end position of the cue search and review search processing. Step 107 is for judging whether or not the time from the start of the search exceeds T2.
Is performed, and if it exceeds T2, the flow branches to processing 108. 108
Is a determination as to whether or not the output of the comparison unit has changed from the presence of music to the absence of music. If there is no change, the process 108 is performed again. If there is a change, the process branches to process 105.

The operation of the music selection device configured as described above will be described below. When the tape running system starts the search running, the processing of the microcomputer proceeds to 101. In the process 102, it is determined whether or not the search is a queue search. If the search is a queue search, the process branches to a process 103, and the next process is not performed for a time T1 from the start of the search. After a lapse of time exceeding T1, the process branches to process 104. In the process 104, it is detected whether or not the output of the comparison unit has changed from no music to music, and music head detection is performed. Processing 10 if a tune head is detected
Branch to 5. In the process 105, the mechanism mode is shifted to, for example, the normal reproduction mode.
The process proceeds to 06, and the process ends. On the other hand, at the time of the review search, the process branches from the process 102 to the process 107, and the next process is not performed for the time T2 from the start of the search. After a lapse of time exceeding T2, the flow branches to processing 108. In processing 108, it is detected whether or not the output of the comparison unit has changed from the presence of a song to the absence of a song, and the end of the song is detected. Processing 105 when a music piece is detected
Branch to In the process 105, the mechanism mode is shifted to, for example, the normal reproduction mode, and when the shift is completed, the process ends. As can be seen from the above operation, when comparing the processing in FIG. 2 with the components in FIG. 1 of the first embodiment,
The processing 102, the processing 103, the processing 104, the processing 105, the processing 107 and the processing 108 are respectively performed by the switch element 4, the first ignoring time setting unit 7, the tune head detecting unit 5, the mechanism control unit 9, and the second ignoring in FIG. The same operation as the time setting unit 8 and the tail detection unit 6 is performed.

As described above, according to the present embodiment, the processing 103 for not performing the next processing for the time T1 from the start of the search is provided before the processing 104 for performing the music head detection, and the processing 108 for performing the music tail detection is performed. By providing a process 107 in which the next process is not performed only for the time T2 from the start of the search before, an optimal ignoring time (about 3 seconds) required for the queue search at the time of the queue search is set in T1 of the process 103. At the time of the review search, the optimum ignoring time (about 5 seconds) required for the review search can be set at T2 of the process 107. After confirming, you can perform a search search on the previous song, and when performing a cue search from the beginning of the tape on a recent magnetic tape with a short leader tape, the beginning of the first song It is possible to perform the beginning of the song detection. Further, since the process 103 for setting the ignore time for the detection of the beginning of a song and the process 107 for setting the ignore time for detecting the end of a song are realized by software, they can be realized with the same hardware configuration as in the conventional example and can be inexpensively configured.

The numerical values in the above embodiments are merely examples, and may be set to optimal values in consideration of the inertia of the mechanism and the like.

[0025]

As described above, the music selection apparatus according to the present invention comprises a tape running system, a reproducing amplifier connected to a reproducing head installed in the tape running system, and a tape amplifying unit which is connected to the tape running system during cue search. A first tune head detection unit that detects a tune start from a no-tune to a tune presence by an output of the playback amplification unit; and the tape running system changes from tune presence to no tune by the output of the playback amplification unit during a review search. And a second tune head detection unit for detecting a tune head based on a change in the tune search, and ignoring the detection by the first tune head detection unit for a first ignoring time set after the tape running system starts cue search. A first ignoring time setting unit for causing the second track start detecting unit to ignore the detection for a second ignoring time set after the tape traveling system starts the review search. Part and the first and second songs And a said tape running system mechanism control unit for switching the travel mode of the output from the detecting unit, a first ignore time of the first ignoring time setting unit
The second neglecting time setting section sets a shorter time than the second neglecting time.
By Teisu so that configuration, at the time of the queue search to set the optimal first ignored time required by the first song head detection unit in the first ignored time setting unit, at the time of review search of the second beginning of the song Since the optimum second ignore time required by the detection unit can be set by the second ignore time setting unit, the head of the song is reproduced, and after sufficiently confirming that the song is not the target song, a review search is performed on the previous song. Also, when a cue search is performed from the beginning of the tape using a magnetic tape with a recent leader tape part, the head of the first track can be detected, and the operability in actual use is greatly improved. Can be done. Also,
Since these components can be easily configured by microcomputer software, they can be realized at very low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram of a music selection device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating processing of a microcomputer of a music selection device according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a music selection device of the related art.

FIG. 4 is an explanatory diagram showing the operation of a music selection device according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape running system 2 Reproduction amplification part 3 Comparison part 4 Switch element 5 Song head detection part (first music head detection part) 6 Song tail detection part (second music head detection part) 7 First ignoring time setting part 8 Second ignore time setting unit 9 Mechanism control unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15/087 G11B 27/10

Claims (2)

(57) [Claims] 1. A tape running system, a reproducing amplifier connected to a reproducing head installed in the tape running system, and the tape running system changes from no music to tuned by the output of the reproducing amplifying unit during cue search. A first tune head detection unit for detecting a tune head according to a change in the tune, and a second tune for performing the tune head detection by a change from tune presence to no tune by the output of the reproduction amplification unit when the tape running system is in a search search. A head detection unit, a first ignore time setting unit that causes the first music head detection unit to ignore detection for a first ignore time set after the tape traveling system starts cue search, and the tape A second ignoring time setting unit for causing the second tune head detecting unit to ignore the detection for a second ignoring time set after the traveling system starts the review search; and the first and second tune heads. The tape running by the output from the detector A mechanism control unit for switching a traveling mode of a row system , wherein the first ignore time of the first ignore time setting unit is the second ignore time.
This Ignore was set to be shorter than the second ignore time of the time setting unit of
And a music selection device. 2. A music selection device for a tape recorder, wherein after a music selection search operation is started, a cue search or a review search is first determined. In the case of a cue search, no music is selected after a set first ignoring time has elapsed. Search for the beginning of the tune by changing from 曲 to 有, and set the mechanism to playback mode,
On the other hand, in the case of a review search, the mechanism start mode is switched by searching for the beginning of a tune by changing from tune presence to no tune after the second ignoring time longer than the set first ignoring time. A music selection device characterized by the following.