JPH0319105Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a data reproducing device such as a tape player.

[Technical background of the invention]

For example, when a data playback device is operated on a cassette tape player, music is played back in the order recorded on the magnetic tape, but if this music is played as background music at home or in a store, Music is played back in a fixed recording order, so
It inevitably becomes monotonous. Also, some recent tape decks and record players are equipped with a song selection function that allows you to specify the order in which the songs are played, but even if you use this function, the order in which the songs are played is fixed and has been specified in advance. If it is played repeatedly, it becomes monotonous.

[Purpose of invention]

This idea was made in view of the above circumstances,
An object of the present invention is to provide a data reproducing device that can randomly select and reproduce data such as music recorded on a recording medium such as a magnetic tape, and can further set the data reproduction probability according to the user's preference. shall be.

〔Example〕

An embodiment in which this invention is applied to a tape player having only a playback function will be described below with reference to the drawings. FIG. 1 shows the overall circuit configuration of this tape player. Input section 1 has playback key (PLAY) 2, rewind key (REW) 3, fast forward key (FF) 4, stop key (STOP) 5, "0" ~
A numeric keypad 6 of "9", a song designation key 7, an A rank designation key 8, a B rank designation key 9, a C rank designation key 10, a random key (RANDOM) 11, and a start key (SSTART) 12 are provided.
This random key 11 and start key 12 are
This is a key that is operated continuously when performing a random play function that randomly selects and plays songs. In addition, each rank designation key 8 to 10 of A to C plays the song of the tape recording order (track number) designated by the numeric keypad 6 and song designation key 7 in this random playback function at four times, three times, or twice the normal number. This is the key operated when playing with a probability of .

Therefore, each of these key operation signals is transmitted to the control unit 1.
given to 3. This control section 13 not only sends control signals to each section described later, but also sends control signals to the mechanism drive section 14 for constant speed playback, rewind playback, fast forward playback, rewind playback, etc.
Sends out travel control signals for fast forward and stop. The mechanism driving section 14 drives a reel motor, a capstan motor, etc. (not shown) in the tape traveling mechanism 15 in response to each traveling control signal, and further moves the playback head PH toward and away from the tape surface of the magnetic tape 16. By moving the magnetic tape 16, it is possible to set the magnetic tape 16 to a constant speed playback state, a rewind playback state, a fast forward playback state, or the like. The magnetic tape 16 is a music tape on which a plurality of songs are recorded, and a silent portion of, for example, 4 seconds is interposed between each song at a constant playback speed. The recording signal of the magnetic tape 16 is reproduced by the reproduction head PH, and the sound is emitted from the speaker 19 via the reproduction circuit 17 consisting of an equalizer circuit, a preamplifier, etc., and the power amplifier 18. In addition, the above reproducing circuit 1
The output of 7 is input to the song interval detection circuit 20. The song interval detection circuit 20 is a circuit that outputs a detection signal a of binary logic level "1" when the input reproduction signal falls from a predetermined level and becomes silent. This detection signal a is given to the control section 13 and the inter-song counter 21 when the silent portion between the songs is played back. Note that the inter-track detection circuit 20 is configured to control the control unit 1 while the tape 16 is set in a rewind playback state or a fast forward playback state.
A control signal b is applied from 3, and this control signal b causes the song interval detection time of the song interval detection circuit 20 to be switched between constant speed playback and high speed playback of rewinding and fast forwarding. ing.

The inter-song counter 21 inputs the detection signal a, which is the output of the inter-song detection circuit 20, as a count signal, and adds "+1" or subtracts "-1" according to the addition/subtraction control signal c given from the control section 13. It is configured as an up-down counter. The inter-song counter 21 is further supplied with a reset signal d and preset data "1" from the control section 13 at timings to be described later, and its count value is sent to the buffer 22 or determination section 23. This buffer 22 is connected to the magnetic tape 16 by the track counter 21.
When the total number N of songs recorded in the recording section is counted, the count value (total number N) is stored and held, and the total number N is given to the calculation section 24 and the song number designation section 25.

On the other hand, the reproduction probability data input and set in the input section 1 is stored in the storage section 26. That is, the storage unit 26 stores the set number of songs K, L, M set for each rank of A, B, C, and the set number of songs for each rank. , M are given to the calculation section 24, and the set number of songs and the set song number are given to the song number designation section 25. This calculation unit 24 inputs the total number N of songs from the buffer 22 and the numbers K, L, and M of songs from the storage unit 27 and calculates data R that defines the upper limit of the generated random number according to the following equation (1). , is sent to the random number generator 26.

R=N+3K+2L+M...(1) Every time the random number generation command e is output from the control section 13, the random number generation section 27 generates a random number from 1 to R, with the upper limit being the numerical data R given from the calculation section 24. and sends it to the song number designation section 25. This song number designation section 25 inputs the input random number to the magnetic tape 1 based on the total number of songs N, the set number of songs K to M, and the set song number.
The operation of assigning the song number to one of the six recorded songs is performed. That is, when the value of the input random number is x, if x satisfies the following (2) with respect to the total number of songs N, then the random number x is directly used as the designated song number. Also, if x is a value that satisfies N<x≦N+3K……(3),
If x is one of "N+1", "N+2", or "N+3", the first set song number of A rank is the designated song number, and thereafter "N+3K-2", "N+3K-"
1" or "N+3K", it is assigned to the last set song number of A rank, respectively. Furthermore, x is a value that satisfies N+3K<x≦N+3K+2L...(4), and x is "N+3K+1", "N+3K
+2", the first set song number of B rank is the designated song number, and from then on, "N+3K
+2L-1" or "N+3K+2L", the last set song number of rank B is assigned to the set song number. Then, when x is a value that satisfies N+3K+2L<x≦N+3K+2L+M=R...(5), and x is "N+3K+2L+1", the first set song number of C rank is the designated song number, and from then on, "N+3K+2L+M", that is, "R'', the last set song number of C rank is assigned as the designated song number.

For example, as shown in FIG. 2, the total number of songs N on the magnetic tape 16 is 10, and the A-rank set song number is the 5th song.
If the set song number for B rank is the 2nd song, and the set song number for C rank is the 9th song, then the set number of songs K, L, M for each rank in this case is "1", respectively, and is calculated by the calculation unit 24. The value of R is R=N+3K+2L+M=10+3+2+1=16. Since the upper limit of the generated random number is defined by the value of R "16", the possible values of the random number x are "1" ~
It will be one of the 16. This random number x is assigned to the specified song number according to each of the above formulas (2) to (5). In the case of formula (2), that is, the random number When the number is found, the random number is directly assigned as the designated song number as shown in FIG. Also, in the case of equation (3), that is, the random number x
takes a value of ``11'' to ``13'', the A-rank set song number ``5'' is assigned as the specified song number, and (4)
In the case of formula (5), that is, when the random number x takes the values "14" and "15", the B rank set song number "2" is the designated song number, and in the case of formula (5), that is, when the random number x takes the values "14" and "15", 16"
When the value is taken, the set song number "9" of C rank is assigned as the designated song number.

Thus, the designated music number assigned by the music number designation section 25 through the above-described operation is provided to the buffer 28. The determination unit 23 determines the magnitude of the specified song number held in the buffer 28 and the count value of the inter-song counter 21, and if it is determined that the specified song number is larger, the signal f is determined to be smaller. Then, a signal g is output to the control section 13, and when a match is determined, a signal h is output to the control section 13. Reference numeral 29 in FIG. 1 is a starting/starting edge detection circuit, and a pulse signal synchronized with the rotation of the reel motor sent from the sensor S in the tape running mechanism 15 is input to this starting/starting edge detection circuit 29. When the pulse signal input is no longer received, the end detection signal i is sent to the control section 13.

Next, the operation of the random playback function will be explained with reference to FIGS. 2 to 4. Now, magnetic tape 1
4. A music tape is used in which 10 pieces of music are recorded with silence between the songs, and the 5th song is designated as A rank, the 2nd song as B rank, and the 9th song as C rank. It is assumed that the playback probability is increased four times, three times, and twice as much as other songs, respectively. The key operations in that case are shown below.

RANDOM A 5 songs B 2 songs C 9 songs, START When the random key 11 is operated for the first time, the process shown in the flowchart of FIG. 3 is started. That is, in step _S1 , the control section 13
When inputting the operation signal of the random key 11, the controller outputs a fast-forward travel control signal to the mechanism drive unit 14. As a result, the magnetic tape 14 is fast-forwarded,
This fast forwarding continues until the end of the magnetic tape 16 is detected by the end detection circuit 29 (step
S ₂ →S ₁ ). When the tape 16 is fast-forwarded to the end, the end detection circuit 29 outputs a detection signal i. When the control section 13 receives this signal i, it outputs a stop travel control signal to stop fast forwarding, and then sends a reset signal d to the inter-track counter 21.
is output and reset, and furthermore, the inter-song counter 21 is set to the addition state by the addition/subtraction control signal C (steps S ₂ →S ₃ ).

Next, the control section 13 outputs a rewind/playback travel control signal to the mechanism drive section 14 (step S ₄ ), whereby the magnetic tape 16 is rewound with the playback head PH in contact with the tape surface. Get started.
At this time, the reproduction signal obtained by the reproduction head PH is given to the song interval detection circuit 20 via the reproduction circuit 17. Also, at this time, the control section 13 gives the control signal b to the song interval detection circuit 20 to set the detection time during high-speed playback, so that the song interval detection circuit 20
0 outputs a detection signal a every time a silent portion of the reproduced signal between songs and at the beginning of the tape 16 is detected. The inter-track counter 21 is incremented each time this detection signal a is input (step _S5 ), and in step _S6 , the end detection circuit 2 is incremented.
The above-described rewind playback state and counting operation are continued from 9 until the detection signal i at the time of detecting the tape start end is output. When the tape start end is detected and a detection signal i is output, the control unit 13 sends a stop running control signal to the mechanism drive unit 14, and the magnetic tape 1
6 tape running is stopped.

As a result of each of the above processes, the count value of the inter-song counter 21 is "10", which corresponds to the number of silent parts immediately before each song (the silent part immediately before the first song is at the beginning of the tape).
This count value "10" is the total number of songs N.
It is supplied to the buffer 22 as a buffer. Batsuhua 22
temporarily holds this total number of songs N = “10” and calculates it in calculation section 2.
4 and the song number designation section 25.

In addition, by performing the above-mentioned key operations using the A rank designation key 8, the B rank designation key 9, the C rank designation key 10, the numeric keypad 6, and the song designation key 7, the reproduction probability is set for each rank. In this example, data "1" is stored as the number of A-rank set songs K, B-rank set number L, and C-rank set number M, respectively, and the set song numbers "5" for A-rank, B-rank, and C-rank are stored. ”, “2”, and “9” are respectively stored. Then, assuming that the playback probability setting is completed at the time when the start key 12 is operated, the above K,
The set number of songs L and M is given to the calculation section 24, and both the set number of songs and the set song number are given to the song number designation section 2.
given to 5. The calculation unit 24 inputs the above set number of songs K, L, M and the total number of songs N from the conversion unit 22, and calculates the above equation (1), that is, R=N+3K+2L+M=10+3×1+2×1+
1=16, give the random number generator 27 the numerical data "16" that defines the upper limit of the generated random numbers, and then set "1" to "16".
Generate random numbers up to.

Next, each process shown in the flowchart of FIG. 4 is executed. First, in order to establish a correspondence between the track number (first track) at the current starting end of the magnetic tape 16 and the count value of the inter-song counter 21, in step P1, the control section ₁₃ sets the preset data "1" to the inter-song counter 21. ” is output, and the content of this counter 21 is set to “1”. Next, as step _P2 ,
The control section 13 outputs a random number generation command e to the random number generation section 26, thereby generating "1" to "1" as described above.
One random number out of "16" is generated and input to the song number designation section 25. The song number designation section 25 is stored in the storage section 2
Based on the set song number and number of songs from 6 and the total number of songs from the buffer 22, the input random number is assigned to the designated song number (step _P3 ). This allocation operation is as described above, and in the present example, as shown in FIG. Ten"
It is assigned to the specified song number up to. In other words, as a result of this assignment operation, random numbers from "1" to "10" are assigned the specified song number as they are, random numbers from "11" to "13" are assigned to the set song number "5" for rank A, and "14" is assigned to the set song number "5" for rank A. ” and “15” random numbers are set to B rank song number “2”,
The random number "16" is assigned to the set song number "9" of the C rank, and as a result, as shown in Figure 2, the playback probability of the set song number "5" of the A rank is 4/
16. The playback probability of B rank set song number "2" is 3/1
6. The playback probability of C rank set song number "9" is 2/16
Therefore, compared to the playback probability of other song numbers, which is 1/16, these numbers are specified with a probability of 4 times, 3 times, and 2 times, respectively.

When the specified song number is assigned from the random number as described above, this specified song number is sent to the buffer 28, and then in the determination section 23, in step _P4 , the specified song number is compared with the count value of the inter-song counter 21. Determination processing is executed. However, the determination unit 23
When it is determined that the designated song number is smaller than the count value, the determination section 23 outputs a signal g to the control section 13. When the control section 13 receives the signal g, it supplies the control signal b to the song interval detection circuit 20 to switch to the detection time for high-speed playback, and sends the addition/subtraction control signal c to the song interval counter 21 to set it in a subtracting state. Furthermore, a running control signal for rewinding and reproducing is sent to the mechanism driving section 14 to rewind and reproduce the magnetic tape 16 (step _P5 ). As a result, the inter-song counter 21 counts and subtracts the silence detection signal a during rewind playback, and this rewind playback and subtraction operation is repeated until the determination unit 23 determines that they match. It can be done. Further, when the determination section 23 determines that the designated song number is greater than the count value, the determination section 23 outputs a signal f to the control section 13. When the control section 13 receives this signal f, it supplies the control signal b to the song interval detection circuit 20 to set the detection time during high-speed playback, and also outputs the control signal b to the song interval detection circuit 20.
is set to an addition state by the addition/subtraction control signal c, and furthermore, a travel control signal for fast-forward playback is sent to the mechanism drive unit 14 to cause the magnetic tape 16 to be played back in fast-forward (step P ₆ ). As a result, the inter-song counter 21 counts and adds up the silent portion detection signal a during fast-forward playback, and this fast-forward playback and addition operation is repeated until the determination section 23 determines that they match.

When the process of step P ₅ or step P ₆ described above is performed and the determination unit 23 determines that the count value of the inter-song counter 21 matches the specified song number held in the buffer 28, the determination unit 23 signal h
is output to the control section 13. When the control section 13 receives this signal h, it switches the detection time of the song interval detection circuit 20 to that during constant speed playback using the control signal b.
The inter-track counter 21 is set to an incrementing state by the addition/subtraction control signal c, and a travel control signal for constant speed playback is sent to the mechanism drive section 14 to cause the magnetic tape 16 to be played back at a constant speed (step P7).

That is, in each of the above steps _P4 to _P7 ,
The operation is performed to search for the silent part immediately before the song that matches the specified song number assigned according to the set probability by rewinding or fast forwarding playback.
In the present example, when the magnetic tape 16 is completely rewound, the inter-track counter 21 is preset to "1", and if the designated track number is "1", the process goes directly from step _P4 to step _P7 . The first track is played, and if the specified track number is "5", the step is played.
Move from P ₄ to step P ₆ , count the intervals between songs while fast-forwarding playback, and when the count value reaches "5" and a silent part just before the 5th song is detected, step P ₇ starts and the 5th song is played. This is what we do.

Thus, the reproduction of the song matching the designated song number is continued until the operation of the stop key 5 is detected at step _P8 , and further continues until the next song interval is detected at step _P9 . This inter-song detection point is when the playback of the song that matches the specified song number has finished.
At this time, the inter-song counter 21 is incremented by 1, and when the control section 13 receives this inter-song detection signal a, it returns to step _P2 of generating a random number again, and repeats the series of operations described above. Also,
When the operation of the stop key 5 is detected in step _P8 , the control section 13 sends a stop running control signal, the magnetic tape 16 is stopped, and the series of operations as the random playback function is completed.

In the above embodiment, the song number (recording order) of the song recorded on the magnetic tape 16 was determined by detecting the immediately preceding unheated portion, but it is also possible to record an address code indicating the recording order between songs in advance. This can also be done by detecting this. Furthermore, the method of allocating random numbers to designated song numbers according to set probabilities is not limited to the above embodiment. Furthermore, the recording medium on which data such as songs is recorded is not limited to magnetic tapes, and the present invention can also be realized with records, digital audio discs, video discs, and the like.

[Effect of idea]

As explained above, this invention provides a data reproducing device that allocates random numbers to data recording ranks according to set probabilities and selects and reproduces data in this recording order. Even if a medium is played over and over again, the playback order of each piece of data will be random, and this will also reflect the user's preferences; for example, when using music tape songs as background music, This is a very useful feature.

[Brief explanation of drawings]

Figure 1 is a circuit configuration diagram of a tape player to which this invention is applied, Figure 2 is a diagram showing an example of the relationship between generated random numbers, designated track numbers, and playback probabilities, and Figures 3 and 4 are random playback, respectively. This is a flowchart for explaining the operation of the function. 2...Playback key, 3...Rewind key, 4...Fast forward key, 5...Stop key, 6...Numeric keypad, 7...
...Track specification key, 8,9,10...Rank specification key, 11...Random key, 12...Start key, 13...Control unit, 16...Magnetic tape, 20
... Song interval detection circuit, 21... Song interval counter, 23
... Judgment section, 24 ... Calculation section, 25 ... Song number designation section, 26 ... Storage section, 27 ... Random number generation section, 29
...Ending end detection circuit.

Claims (1)

[Scope of utility model registration request] means for generating a random number; means for detecting the recording order of each piece of data on a recording medium in which a plurality of pieces of data are recorded; a probability setting means for setting a data reproduction probability for each data; random number allocating means for allocating random numbers generated by the random number generating means to respective recording ranks of data according to a probability determined by the random number generating means; and means for selecting data having the recording ranks assigned by the allocating means from the recording medium. and a reproducing means for reproducing the data selected by the selecting means, and reproducing data on the recording medium randomly and according to a set probability.