JPS6080190A - Automatic music selector - Google Patents

Abstract

PURPOSE:To decrease the waiting time in a music selection mode by counting the number of pieces of recorded music even in the operation modes of a quick traversing key and a rewind key and rewinding automatically a magnetic tape only in the first music selection mode after the tape is loaded. CONSTITUTION:A detection switch 13 detects that a magnetic tape is loaded to a tape drive means, and a recording order designation key 55 designates the recording order for plural pieces of information to be recorded on the tape. Then the tape is driven at a high speed or a fixed speed by means of drive indication keys 51-55. The number of reproductions performed by the information reproduction signals are counted by a drive detection sensor 11. A CPU4 performs control so that the tape is always driven in a reproduction state and the information reproduction frequencies are counted by the sensor 11 in the operation modes of drive indication keys at and after a period while the same tape is loaded. Then a discriminating means 42 compares to discriminate the recording order designated by the key 55 with the count value of the counting means 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention 2 The present invention relates to an automatic music selection device that enables music selection by absolute address specification in a magnetic tape playback device such as a cassette tape recorder or a video cassette recorder. Recently, various cassette tape recorders have been commercialized that have an automatic song selection function that automatically detects and plays a specified song from among a large number of songs recorded on magnetic tape. The principle of this automatic music selection function can be divided into two types: relative number location method and absolute number location method.

A detection circuit is provided to detect a pre-recorded predetermined frequency signal between each part or between songs, and the beginning of a designated song is determined by counting the detection output. This method does not specify the absolute tsubaffl 111th position for each song, but rather specifies the song number based on the currently playing song, so when specifying a song, it is necessary to specify how many songs ahead (or previous) the song is. On the other hand, with the latter absolute number location method, an address code corresponding to the song number is recorded in advance between songs, and the address code is used to select the song. This is one thing that does this.

Although this method improves the operability when selecting music, since it is necessary to record the address code in advance, it inevitably complicates the circuit and increases cost. Therefore, this type of absolute address system has only been adopted in some high-end cassette decks, and has not yet been adopted in general-purpose machine inserts.

Therefore, basically, as a configuration of the above-mentioned relative banchi style,
A method is being considered that combines kneading with the ease of operation of the Zettai Banchi method. This method automatically rewinds the tape at the beginning of the tape each time you make a mistake in selecting a song, resets the counter at this point, and then counts the silent parts between songs while fast-forwarding. When the specified song number and number match, the tape is put into playback mode. The advantages of this method are that the circuit configuration is simple because it uses silence detection, and that it has the same operability as the absolute number location method described above, but on the other hand, the fast forward key and rewind key As a result of this operation, the count value may no longer correspond to the current track number, so for users who wish to automatically return to the beginning of the tape each time they perform a song selection operation, this requires an extremely troublesome waiting time.

<Purpose of the Invention> It is an object of the present invention to further improve the above-mentioned desk and absolute banchi system and to provide an automatic music selection device that can reduce the waiting time during music selection operations without impairing operability. It is something to do.

<Summary of the Invention> The automatic song selection device of the present invention not only detects that a magnetic tape is loaded into the tape transport means, but also counts the number of recorded songs (information) when the V forward key and rewind key are operated. In this way, automatic rewinding is performed only during the first music selection operation after loading the magnetic tape, and subsequent automatic rewinding is unnecessary while the same tape is being used.

<Embodiment of the Invention> An embodiment in which the present invention is applied to a cassette tape player will be described below with reference to FIGS. 1 to 10. FIG. 1 shows a block diagram of a tape player. In the figure, reference numeral 1 indicates a music cassette tape with a total number of 8 songs, with a silent section of about 5 seconds interposed between the songs when running at a constant speed, and 2 indicates a loaded music cassette tape. Play cassette tape 1 at constant speed (PLAY), fast forward playback (OUE), and rewind playback (
Rf bow vx MW), volume) RL, CRgW) and stop (
A tape running mechanism 3 is set to each state of STOP), and a tape running mechanism 2 is set to each of these tape running states.
A drive circuit for applying operating pressure to a solenoid, a rotary motor, etc. (not shown) provided in the drive circuit 4, and P for setting each tape running state for this drive circuit 3.
LAY, 0UIf1%REVIEW, FIEW and 5T
The OPU (central processing unit) that sends out each running side sub-signal of the OP, 5 is a key manual unit equipped with keys for tape running instructions and music selection. The entire control operation is performed based on each signal α to C, which will be described later, and there is a storage section 41 and an operation/compare system for performing calculations and comparisons on the data stored in the storage section 41.
A comparison section 42 is configured. As shown in FIG. 2, the data stored in this storage unit 41 is each flag of d-da, set number data, target song number, current song number, total number of songs, and winding time. This will be explained in detail when explaining the operation.

The key manual section 51 also includes a playback key 51, a fast forward key 52, and a rewind key 53 as keys for instructing tape running.
and stop key 54, and rOJ to “9” as keys for music selection.
Number setting keys 55 and clear keys 56 for Wt bush correction I
Each key 51 to 56 is 0P.
It is sampled by the sampling signal from U4.

In addition, the middle mark 6 in FIG.
While the device is set to fast-forward playback and rewind playback, it is brought into contact with the magnetic tape surface to obtain a playback signal.

The reproduction signal obtained by this reproduction head 6 is given to a speaker 9 via a reproduction equalizer 7 and a power amplifier 8.
The music recorded on the cassette tape 1 is played. The output of the playback equalizer 7 is also supplied to the sound/silence detection circuit 10, which detects the level of the input playback signal and detects the level of the input playback signal.
A sound/silence detection signal 0, which is at a high level and becomes a low level during reproduction of a silent portion, is sent to the U PU 4. This sound/silence detection circuit 10 receives the driving control signal outputted from 0PU4, CUE (No. 8 and mouth gV I).
IjV signal is given, and this 0Uhi signal and Rl
(While either VI EW double signal is given, the sound/silence detection level is set high, and the o, ug and FI
EVII;l! While none of the W Credentials have been given,
In other words, when the regenerator detects sound or non-sound while traveling at a constant speed, the detection level is set low. Oh, the power amplifier 8 also has a CUE signal and a REV I signal.
Since the EW signal is not applied, the power amplifier 8 is configured to perform muting without sending an amplified message to the speaker 9 while the signal is being input.

On the other hand, a tape running detection sensor 11 that generates a pulse signal in synchronization with the rotation of the reel motor is provided in the tape running mechanism 2, and the pulse signal output from this sensor 11 is waveform-shaped by a comparator 12. After that, OP is given to J4 as a tape running detection signal.
A loading detection switch 13 for detecting loading is provided.

For example, as shown in FIG. 3, this switch 13 has a structure similar to the accidental erasure prevention tab detection switch normally provided in a tape recorder, and when the cassette tape 1 is loaded into the tape transport mechanism 2, 13 is about to open,
When the cassette tape 1 is taken out, the switch 13 is closed and the loading detection letter α is sent to the 0PU4.

Next, the operation of this embodiment having the above configuration will be explained.

The tape player of this embodiment specifies the track number of each side recorded on the cassette tape 1 (absolute track number counted from the beginning of the tape) using the fll# key 55, and then presses the playback key 55.
1, it has an automatic music selection function that locates the beginning of a designated song number and starts playing from the beginning of that song. Therefore, 0PU4 performs step 31%i of the flowchart shown in FIG. 4 after inputting lit Ij@.
Each process of 9G is executed repeatedly. First OP U 4
sends a key sampling signal to the key human power section 5,
It is determined whether or not a key has been operated in the key manual section 5 (step 81) o If it is determined that a key has been operated here, the process corresponding to each operated key is executed, and the rewind key 53 is operated. When the playback key 51 is operated, the RgVIEW signal is sent out and six playback heads are attached to the tape surface. a constant speed playback process (step S3)' indicating that the fast forward key 52 is operated, a fast forward playback process (step Sj) in which the COE signal is sent out and the playback head 6 is attached to the tape surface and it is fast forwarded;
Furthermore, when the stop key 54 is operated, s'r o
A running stop process (step SS) for stopping tape running by sending out a p signal is executed. Further, when the numeric key 55 is operated to select a song, the numeric data is stored in the storage unit 41 inside the 0PU4, and when the clear key 56 for correcting the digits is operated, the numeric data is stored. A number setting process (step 86) is performed to clear the #kei data stored in the section 41.

In this way, when the playback key 51 is operated, not only fC and 4, but also when the fast forward key 52 and the rewind key 53 are operated, control is performed so that the playback (1') is obtained from the playback head 6. If a key operation is performed, the 0PU4 performs the processes of steps 82 to S6 above, and then performs the sound/silence process (step 87), the details of which are shown in FIG.
Then, the winding cut detection process (details shown in Figure 7) is performed.
Step 8B) and the cassette presence/absence detection process (step Ss) shown in detail in FIG. 8 are executed, respectively, and the process returns to the key sampling process (step 81) for waiting for the next key operation.

However, in 0PU4, steps Sl to S9 are performed like this.
Although each process is repeatedly executed, the force will be explained based on an example of an actual operation from loading a cassette tape to key operation. First, when the tape transport mechanism 2 is not fully loaded with the cassette tape 1, the loading detection switch 13 is closed as shown in FIG.
4, @ loading detection signal α is hi! It is input as an I level.

On the other hand, the 0PU4 executes the processes of steps 81 to S9 described above, but when the cassette tape 1 is not loaded and there is no key operation, the actual processes of steps 82 to S8 are not performed, and the Aig of the detection signal α is When the level is detected, the eighth cassette presence detection process of step 89
Each process whose details are shown in the figure is performed. That is, while the loading detection signal Ha is being input as h5qh level, 0PU4 cannot detect this (step R1 in FIG. 8).
The drive circuit 31 is outputting the 5TOP signal (@step R2 in Figure 8), and the running operation of the tape running mechanism 2 is stopped. Furthermore, during this time, OPU, 4, in the memory 141, d flag (flag indicating that all the number of songs have already been detected), e flag (flag indicating that the current song number has already been detected), f The flags (flags indicating that detection of sound/silence in the reproduced signal has already been performed) are cleared (steps R11 to R5 in FIG. 8), and key operations are disabled (step Rg in FIG. 8). ).

The case where the following operations (1) to (4) are performed from this tape-unloaded state will be described.

Q Load cassette tape 1 into tape traveling machine $2.

■, To select the 5th song, press the l0] key.

■ Press the key twice to fast forward.

■Operation of oEIX■ to select the third song again.

<■ Cassette Tape Loading> When the cassette tape 1 is loaded into the tape traveling mechanism 2, the loading detection switch 13 changes from the open state shown in FIG. 3(a) to the open state shown in FIG. 3(b).

As a result, the detection signal αji given to PU4
hi, qh level ka 1. It is at OW level.

On the other hand, 0PU4 is performing the key sampling process of step 8t in Figure 4, but since there is no key operation in this case, the sound/silence process shown in step S7 of the next figure NK4 is performed.
I'm anxious. This sound/silence processing is actually performed only while the tape is running, and in this case it is RE~■, PLAY,
CU1! Each running control of
The process proceeds to the unwinding detection process shown in FIG. This winding end detection process, as shown in steps M1 to M+1 in FIG. The current song number data in 41 is set to rlJ, and when the winding is completed to the end, "-1" is added to the current song number data to determine and store the total number of songs. However, in this case, step M in Figure 7]
When the tape stop sign is detected, step 8 in Figure 4 is performed.
This goes against the cassette presence/absence detection process shown in g. In this cassette presence/absence detection process, as described above, the level state of the loading detection signal α is determined as step llt in FIG.
ow level, this cassette presence/absence detection process is completed, and the process returns to the key sampling process shown in step Sl in FIG. 4. However.

Thereafter, the above process will be repeated until a key is pressed.

■, select the 5th song> There are now 11 cassette tapes, as shown in Figure 10 (a).
It is assumed that the music of a song is recorded with silent parts interposed between the songs. In order to select the fifth song counting from the beginning of the tape of the cassette tape 1, first, when "5" is set using the number key 55, the key sampling process of step 81 in FIG. 4 is followed by the number setting process shown in step S6. The 0PU4 stores the numeric data "5" - in the storage unit 41 through the numeric processing of proceeding to , and performs the next sound/no-sound processing (step S7), winding cut detection processing (step S g ), and cassette processing. The presence/absence detection process (step So) is performed, and then the key sampling process of step S1 is executed again.

When the playback key 51 is operated in this state, the process proceeds from the key sampling process at step 81 in FIG. 4 to the constant speed playback process (step 511 in FIG. 4), the details of which are shown in FIG. In this constant speed playback process, first, as shown in step Ql in FIG. 5, it is determined whether or not there is number data stored in the storage section 41. This is to determine whether the playback operation after setting a number is a music selection operation or a simple playback operation.Since this is a playback operation after setting a number, the process advances to step 81 in FIG. In step Q3, the content of the numeric data in the recorder 41 is set as target song number data, and after the setting is completed, the content of the numeric data is cleared in step Q4. And the next step Q
In s, the d flag indicating that the total number of songs has been successfully detected is determined, but in this case, the d flag has not been cleared since the tape has just been loaded. Therefore, the process proceeds to step QB, where the current song number is determined; a flag indicating that it has already been detected is determined.

This e7 lag is also in a clear state like the d flag, and the process proceeds to the next steps Q9 to Q14.

The processes of steps Q9 to Q+4 are for rewinding the lζ cassette tape 1 at the start end O and initializing the current song number data during the first song selection operation. First, in step Q9, 0PU4 outputs the RgW signal. As a result, the tape traveling mechanism 2 starts rewinding the cassette tape 1. This rewinding process is continued as the next step Q1o until it is determined that the tape has been completely unwound at the beginning of the tape. This rewinding process is performed as follows. That is, while the tape is running, the running detection sensor 11
High level and L in synchronization with the rotation of the reel motor.
A pulse signal repeating ow rate is given to 0PU4 as a tape running detection signal via the comparator 12, and 0PU4 receives this detection signal bf,: hi, qh.
Interrupt processing 3+1 every time input as level! , L
- to clear the winding time data in the storage section 41. This winding time data is constantly counted up at regular intervals while the tape is running.
- to generate a carry signal.

Therefore, while the tape is running, the above-mentioned detection signal Hb is manually inputted in synchronization with the rotation of the reel Tanabata to clear the winding time data, so there is no overflow, and the signal from the sensor 11 is completely unwinded. When the pulse signal output disappears and approximately 4 seconds have passed thereafter, the winding time data overflows.

The 0PU4 determines whether to wind the tape by detecting this overflow. When the cassette tape 1 is completely rewound to the beginning of the tape, the process proceeds to the next step Q11. In this step Qll, the storage unit 4
The current song number data in 1 is set to ``1'' as an initial value. The reason for this is that when the cassette tape 1 is wound, the leader tape part is in a position facing the playback head 6, and the first song of music-hX is recorded following this leader tape part, so the current Song number G r I
J. Then, in the next step Q, xz, the current track number is already detected, and the e flag is set to "1", and since the playback head 6 is located in the leader tape section, the active/silent track is not played. The f flag indicating that the sound was not detected is set to "1" (step QIA), and the 1 flag indicating that there is a sound is cleared (step Q14).

Next, as step Q15 in FIG.
5J) in the arithmetic/comparison unit 42 to determine subsequent processing. Now, since the current song number data is "1" and the target song number data is r5j, the process advances to step Qll+. In this step Q, 16, 0PU4 to 0UTA
When the signal is output 5, the cassette tape 1 is set to a fast-forward playback mode in which the playback head 6 is fast-forwarded with the playback head 6 in contact with the tape surface. And the processing is step Ql? Proceed to the sound/silent ejection process. This sound/silence detection processing is performed by processing step P+-Pts on the 61st side.
If the tape is running, check the sound/silence detection signal 0 and change the current track number to "+IJ or r-" depending on the tape running direction.
IJ processing is performed. That is, traveling in the forward direction (
During fast forward playback, constant speed playback), when the signal 0 changes from the hLg level to the Low level, the current track number is incremented by "+1". Further, during running in the reverse direction (rewind playback), when the letter 0 changes from low level to high level, the current song number is incremented by "-1". This state is shown in @10 Figures (a) to ). Here, Figure 10 (a) shows the recording state of the cassette tape 1, where the shaded area is the song recording area (sound area) and the numbers are the song numbers. Further, FIG. 10(b) shows the level states corresponding to the sound part and the silent part of the sound/non-sound detection signal 0.

4) Figure 410 (c) shows the timing of [+1] corresponding to the level change of signal 0 when the tape is running in the forward direction, and Figure 10) shows the timing of signal C when the tape is running in the reverse direction. It shows the timing of "-1" corresponding to a level change. Note that the arrow directions in FIGS. 10(C) and 10(C) and (E) to (G), which will be described later, indicate the relative moving direction of the reproducing head 6. However, in this case, since we are playing in fast forward, the current track number is incremented by "+1" at the point when the signal o goes from the high and qh levels to the low level, that is, at the end of the sound. 0PU4 performs the above-described winding/cutting determination processing as step Q1g in FIG. 5, and repeats the processing of steps Qls to Qtg. This continues until it is determined in step Q15 that the current song number and the target song number match, or until it is determined in step QIB that the tape has been wound to the end. In this case, when the current song number data reaches 51, it is determined that it matches the target song number, and from step Q+s to step Q in FIG.
The process proceeds to the cue processing of 211. This cueing process executes each process shown in steps K1 to 6 in FIG. 9, and since the OUg validation is currently being output, proceed from step 1 to step 2 in FIG.・Continue fast-forward playback while checking the level status of silence detection signal O. Then, when the signal 40 changes to the hi, qh level, the process proceeds to the next step 3. That is, immediately after it is determined that the current song number matches the target song number, the signal JikO is at a low level.
! : The playback head 6 is located between the fourth and fifth songs of the cassette tape 1. Then, fast-forward i-sketches (
Immediately after the signal 0 becomes high level as the play continues, the playback head 6 is positioned at the beginning of the fifth song. In this state, the J flag indicating the presence of a sound is set to "1" at step Kll, and then the RI is set to 4 at step Kll.
The i3VIgW signal is output to rewind the cassette tape 1 and place it in a playback state.

This rewind playback state continues until the signal 0 changes from high level to low level in the next step 5. The point of change to this low level is when the playback head 6
is at the position n1tL immediately before the fifth song, and this means that the cue for the fifth song has been completed.

Then, in step 6, the y flag indicating the presence of sound is cleared, and this cue processing is completed. Thereafter, the process returns to step Q24 in FIG. 5, where the 9.0 PU4 outputs a PLAY signal to set the cassette tape 1 to a constant speed playback state, and the playback sound starts from the beginning of the fifth track. This state is shown in FIG. 10 (E).

<■, Fast Forward> Assume that the fifth song has been automatically selected in this way, and that the fast forward key 52 is now operated in the middle of the sixth song.

This key operation is detected by the key sampling process shown in step St in FIG. 4, and the fast-forward playback process shown in step S4 is performed. As this fast forward playback process, 0PU4
outputs the 0 (JB signal) and sets the cassette tape 1 to the fast-forward playback state. After that, 0PU4 performs the sound/silence processing in step S7 in FIG. The operation of executing the detection process and returning to the key sampling process of step S1 is repeated.Therefore, 0PU4 updates the current song number in step S7 even if the fast forward key 52 is operated. The condition is shown in Figure 10(f).

<■, Select the third song again> Next ζ In order to select the third song again from this state, it is assumed that the playback key 51 is operated after setting "3" using the number key 55. The number setting process in this case is performed in the same manner as when selecting the fifth song described above, and will be explained below from the point where the process proceeds to the constant speed playback process shown in step Sa in FIG. 4.

In this constant speed playback process, since the playback operation is performed after the number has been set, the process proceeds from step Ql in FIG. After clearing the ItM data in step Q4, the process proceeds from Stella 7'Qs to Q8, indicating that the current song number has already been detected.
Determine the a flag. This e-flag has already been set to rlJ in step Qlz of FIG. 5 during the previous song selection operation, that is, the first song selection operation after loading the cassette tape. Processing such as rewinding to initialize the number is not performed.

Promptly, this time step QIB directly from step Q11
Proceed to comparison processing. Assuming that the previous operation of the fast-forward key 52 caused the tape to be fed halfway through the eighth track, the current track number data in the storage unit 41 is "8". In step QIS, the current song number [8, 1 and the target song number [3[
are compared, and an EV I EW signal is output.Cassette tape 1 is rewound and played back toward the target track number by Kne. .During this period, as the sound/silence processing in step Q22, when the signal 0 changes from low level to high level, "-1" is added to the current track number.
'', and this is repeated until the target song number and the current song number match in step Q1s. If a match is determined, the process advances to step Q211 and cue processing is executed. The cueing process this time is n
Since the EvIaw signal is being output, step l(
The level of signal C is determined by proceeding 5i steps. That is, in this case, the point at which the target song number and the current song number match is immediately after the playback head 6 starts playing the end portion of the third song, and since the REVIEW signal continues to be output even after that, the step 5 and signal 0 Z (111
The time when the level is detected is immediately after the reproduction head 6 reaches the interval between the second and third songs. When the low level of the signal 40 is detected, the process advances from state 5 to step 6, clears the duffle flag, and ends the cueing process. Then, step Q2 in FIG.
Returning to step 4, cassette tape 1 is set to constant speed playback state and
The song starts playing from the beginning of the song.

This situation is shown in Figure 10(g).

The explanation of the operations other than the above-mentioned operations ■ to ■ will be omitted, but the operations related to each cow operation are all disclosed in the flowcharts shown in FIGS. 4 to 9.
It will be easily understood by those skilled in the art.

Furthermore, the structure of the cassette tape loading detection switch 13 in the above embodiment ζ is not limited to that shown in FIG. The presence or absence of the cassette tape may be detected, or the structure may be linked to an eject button operated when ejecting a cassette.In short, the structure may be used to determine whether or not a cassette tape has been newly loaded. . Furthermore, in the above embodiment, the music selection function is to play the music starting from the beginning, but it may also be a function of simply finding the beginning and then stopping. Further, in the above embodiment, an automatic six-track audio cassette tape apparatus has been described, but it is of course applicable to an open reel type and also to other video cassette recorders. Although the expression "automatic music selection" has been used throughout this specification, it goes without saying that this also includes audio data, image data, etc. other than music.

<Effects of the Invention> As explained in detail above, according to the present invention, songs can be selected by absolute address, and the current song number is automatically rewinded to the beginning of the tape only during the first song selection operation after loading the magnetic tape. (jou＠斂) is initialized, but there is no need for automatic rewinding during subsequent song selection operations while using the same tape, which has the excellent effect of extremely shortening the time required for song selection. It is something to play.

[Brief explanation of drawings]

The drawings all show one embodiment of the present invention, and FIG. 1 shows a block V of a cassette tape player, FIG. 2 shows an intended arrangement inside the storage section 41, and FIG. 3 shows a tape loading detection switch. An example of the structure of 13 is shown in Figure C, Figures 4 to 9.
The figure is a flowchart for explaining the control operation of 0PU4, and FIG. 10 is a diagram for explaining the operation at the time of music selection operation. 1... Cassette tape 2... Tape running mechanism 4.
...OPU 5...Key human power section 11...Tape running detection sensor 13...Tape loading detection switch Patent applicant Casio Computer Co., Ltd. Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] a tape running means for obtaining a reproduced letter of information recorded on the magnetic tape by running the magnetic tape with recycled dust; a loading detection means for detecting that a magnetic tape is loaded on the tape running means; A recording order designation key for specifying the recording position of the information to be selected from among the plurality of information recorded on the tape, and a running instruction for causing the magnetic tape not loaded in the tape running means to run at high speed or at a constant speed. a key, a counting means for counting the number of reproductions from a reproduction signal of information recorded on the magnetic tape, and a magnetic After rewinding the tape to the starting end, the count value of the counting means is set to an initial value, and the magnetic tape is run in a reproduction state, and the number of information reproductions is counted by the counting means. a control means for controlling the magnetic tape so that the same magnetic tape is run in the playback state and the number of reproductions of information is counted by the counting means upon subsequent operation of a run instruction key while the same magnetic tape is not loaded; and the recording order designation. 1. An automatic music selection device comprising: a determining means for comparing and determining the e-recording ranking specified by the key and the count value of the counting means.