JPH0713088Y2 - Identification signal recording device for software recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an apparatus for recording an identification signal corresponding to a program content on a software recording medium.

(Prior Art) A general audio tape recorder is often used as an external storage device (data storage) such as a pocket calculator or a personal computer. In parallel with this, program-recorded soft cassette tapes and the like are mass-produced.

(Problems to be solved by the invention) However, with such a soft tape, it is almost impossible to determine the program content from the reproduced sound.

Therefore, at the time of mass production of soft tapes, it is necessary to determine whether the contents of the recorded soft tapes match the label display of the tapes, or whether the contents are the desired ones. It is the current situation that I do not understand unless I actually load it on a given computer.

The present invention has been made in view of the above circumstances. Even if a program recorded on a software recording medium such as a tape is not actually loaded into a computer, the recording medium is reproduced by an audio signal reproducing device such as a tape recorder. It is an object of the present invention to provide an identification signal recording device for a software recording medium, which can record an identification signal enabling the determination of the program content (type) on the software recording medium.

(Means for Solving the Problems) In order to achieve the above-mentioned object, in an identification signal recording device for a software recording medium according to the present invention, an identification signal corresponding to a program content recorded in the software recording medium is recorded. In order to do so, an audible signal generator that generates an audible signal of a predetermined frequency, and a block signal generator that extracts the output signal from the audible signal generator for a predetermined time and generates a block signal composed of the audible signal. An identification signal generation unit that generates an identification signal including a plurality of the block signals, and a recording unit that records the output signal from the identification signal generation unit at a predetermined location of a software recording medium,
It has.

(Operation) Therefore, in the present apparatus, the audible signal generated by the audible signal generating section is converted into the block signal by the block signal generating section, and the identification signal generating section generates the identification signal including a plurality of the block signals.

Then, the identification signal is recorded by the recording unit at a predetermined location on the software recording medium.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a case where an identification signal is recorded on a two-track cassette tape 1 capable of reciprocal recording as a software recording medium by this apparatus. On the first and second tracks on the A side of the tape 1, an identification signal corresponding to the contents of the program is recorded prior to the program section. When this tape is reproduced from the beginning with a tape recorder or the like, the identification signal is first reproduced. By listening to this identification signal for a few seconds,
The program content of this tape can be determined. The identification signal may be recorded on only one of the first and second tracks.

FIG. 2 shows a modification of FIG. Here, the identification signal is recorded at the end of the B side. Since the end of the B side corresponds to the beginning of the A side, the identification signal can be detected before the program is reproduced by reproducing the recording track of the B side with a dedicated machine when reproducing the head of the tape. When such a signal recording pattern is adopted, when the general user loads the program on the A side or the A side to the B side into the computer, the identification signal will not be erroneously input to the computer. From this, according to the recording pattern of FIG. 2, an error is less likely to occur at the time of program loading, as compared with the case of using the recording pattern of FIG.

FIG. 3 shows an example of the content (signal pattern) of the identification signal recorded by this apparatus. This signal pattern is 3 wave A
It includes a block and a 4-wave B block. The A block is composed of a combination of single tones (spot signals) having any of three kinds of audible frequencies f1, f2 and f3, and is used for a large classification of soft cassette tapes. The B block has an audible frequency f4 having one of two signal widths t1 and t2
It is composed of a combination of four sets of spot signals of, and is used, for example, for small classification of cassette tapes. Here, the wide signal width t1 corresponds to the logic "1" and the narrow signal width t2 corresponds to the logic "0". Since the B block consisting of a binary 4-bit code can specify 2 ⁴ = 16 combinations, 16 types of cassette tapes can be distinguished by the B block. In addition to the spot signal, the signals of the A block and the B block may be a sweep signal, a modulated signal, a multiple wave composite signal, and other signals.

FIG. 4 shows an example of an apparatus for recording the program identification signal and the software program on the tape. The pattern of the identification signal that shows the contents of the program is the pattern command key.
Specified by 10. The command key 10 uses the ROM 12 as a code converter for the address signal E10 corresponding to the key operation.
Give to. The ROM 12 outputs the identification signal data D12 from the address designated by the signal E10. This data D12 is
The D / A converter 14 converts eight analog signals E14 ₁ to E14 ₃ and E14 ₅ to E14 ₉ . Signal E1
4 _1, E14 ₂ and E14 ₃ are given in a VCO (voltage-controlled oscillator) 16, 18 and 20. The VCOs 16, 18 and 20 generate signals E16, E18 and E20 for the A block pattern having frequencies f1, f2 and f3 corresponding to the voltages of the input signals E14 ₁ , E14 ₂ and E14 ₃ , respectively.

Signals E14 ₅ , E14 ₆ , E14 ₇ and E14 ₈ , MMV (monostable or one-shot multivibrator) 22, 24, 26 and 28 are provided. MMV22 to 28 are shift pulses P described later.
When triggered by 5 to P8, it generates gate pulses P22 to P28 for the B block pattern having a predetermined pulse width. The pulse width of each gate pulse P22 to P28 is equal to the signal E14 ₅ to E14 ₈ input to the MMV22 to 28.
Is determined by the voltage of. Signal E14 ₉ is provided to the VCO 30.

VCO30 has a frequency f4 corresponding to the voltage of the signal E14 ₉ B
The signal E30 for the block pattern is generated. In addition, VCO30
May be a conventional oscillator with a fixed oscillation frequency f4.

The signals E16, E18 and E20 are two-input AND gates 32, 34 and 36.
Is applied to the first input terminal of. Gate pulse P22, P24, P26
And P28 are the first of two-input AND gates 38, 40, 42 and 44.
It is given to the input terminal. The signal E30 is applied to the second input terminal of each of the AND gates 38 to 44.

The ROM 12 generates the initial pulse P12 when outputting the data D12. This pulse P12 is delayed by the delay circuit 46 for a certain period of time to become the shift input pulse P46. Due to this pulse delay, the oscillation frequency of VCO16 to 20 and VCO30 is
The output pulse width of the MMV22 to 28 is stable at a value corresponding to the data D12. The pulse P46 is input to the 8-bit shift register 48. The shift pulses P1 to P3 output from the first to third bits of the shift register 48 are
It is applied to the second inputs of AND gates 32 to 36. The fourth bit of the shift register 48 is left free to make a space between the A block pattern and the B block pattern of the identification signal. The outputs P5 to P8 of the fifth to eighth bits of the shift register 48 are supplied to the trigger inputs of the MMVs 22 to 28. The shift register 48 sequentially shifts the input pulse P46 by the clock pulse CK50 from the clock oscillator 50. When the shift of 8 bits is completed, the next clock pulse CK50 causes
The shift output pulse P48 is output from the shift register 48. 5a to 5k show the shift register 48 described above.
It shows the state of pulse shift in the inside.

The AND gates 32 to 44 are sequentially opened and closed by the high level of the shift pulses P1 to P8. While the pulse P1 (FIG. 5c) is being input to the AND gate 32, the AND gate 32 passes the signal E16 having the frequency f1 (FIG. 5q; t10 to t1).
2). When the pulse P2 (FIG. 5d) is input to the AND gate 34, the AND gate 34 passes the signal E18 of the frequency f2 (FIG. 5q; t14 to t16). Pulse P3 (Fig. 5e) is AND gate 3
When the signal is input to 6, the AND gate 36 passes the signal E20 having the frequency f3 (FIG. 5, q; t18 to t20).

Frequencies f1 to f3 output from AND gates 32 to 36
Serial burst wave signal (q10 in FIG. 5; t10 to t20) forms the A block pattern of the identification signal. During the generation of the pulse P4 (Fig. 5f), the AND gates 32 to 44 are all closed.

When the pulse P5 (Fig. 5g) is generated, the MMV22 is triggered and the gate pulse P22 (Fig. 5l) having the pulse width t1 is given to the AND gate 38. The AND gate 38 passes the signal E30 of the frequency f4 while the pulse 22 is at the high level (Fig. 5).
q; t22-t24). When pulse P6 (Fig. 5h) occurs, MMV2
4 is triggered and a gate pulse P24 (FIG. 5m) having a pulse width t2 is given to the AND gate 40. The AND gate 40 allows the signal E30 to pass while the pulse P24 is at the high level (Fig. 5).
q; t26 to t28). When the pulse P7 (Fig. 5i) is generated, the gate pulse P26 having the pulse width t2 (Fig. 5n) is generated, and when the pulse P8 (Fig. 5j) is generated, the gate pulse P28 having the pulse width t1 (Fig. 5). o) occurs. AND gate 42 is pulse P2
Pass signal E30 when 6 is at high level (Fig. 5 q; t3
AND gate 44 passes the signal E30 when the pulse P28 is at high level (FIG. 5, q; t34 to t36).

A serial burst signal having a burst signal width t1 or t2 output from the AND gates 38 to 44 (FIG. 5, q; t22
To t36) form the B block pattern of the identification signal.

The outputs of the AND gates 32 to 44 are combined by the OR gate 52 and converted into the identification signal E52 composed of the A block pattern and the B block pattern described above.

The shift output pulse P48 (FIG. 5k) is transferred to the delay circuit 56.
Is delayed by a certain time and becomes a program read start pulse P56 (FIG. 5p). When this pulse P56 is inputted to the program memory 58, the program data D58 (fifth data) having the content corresponding to the identification signal data D12 is read from the memory 58.
Figure q; t40 and later) is output. The above-mentioned identification signal E52 and program data D58 are combined into a recording signal S54 (FIG. 5q). This signal S54 is the master tape recorder 5
Recorded on magnetic tape by 4.

If the identification signal as described above is recorded on a soft tape together with the program, the contents of the tape program can be read from the reproduced sound (sound or spot signal) of the identification signal without actually loading the program on the computer. It can be easily determined. In particular, when a spot identification signal having a specific signal pattern is used, it is advantageous for automatic determination of program contents in the soft tape mass production process. On the other hand, the use of the voice identification signal is advantageous when a person determines the program content. The spot signal and the audio signal may be used together as the identification signal.
In short, for example, the identification signal recorded prior to the recording unit of the program may be configured to include a plurality of block signals including audio signals and spot signals.

FIG. 6 shows a structure for decoding the identification signal pattern. The identification signal pattern recorded on the magnetic tape is the reproduction head 60.
Detected by. The output of the playback head 60 is the preamplifier 62
Is amplified and becomes a reproduction output signal E62 (FIG. 7A). This signal E62 is waveform shaped by a waveform shaping circuit 64 such as a Schmitt trigger circuit, and the identification signal pulse E64
(Fig. 7b). This pulse E64 passes through the first input terminal of the 2-input AND gate 66 to become the signal pulse E66, and the MMV
Given to 68. At this time, since the gate signal E82 of logic "1" described later is applied to the second input terminal of the AND gate 66, the AND gate 66 is open. MMV68 is AN
Triggered by the first rising edge of the output pulse E66 of the D-gate 66, it produces a gate signal E68 (Fig. 7c) of signal width TG. The time constant of the MMV68 is such that the width TG of the gate signal E68 is the burst cycle of the identification signal pulse E64 (t50 to t54 in FIG. 7, etc.).
Is set to be slightly smaller than

The gate signal E68 is applied to the first input terminal of the 2-input AND gate 70. To the second input terminal of the AND gate 70, the signal pulse E66 delayed by the delay circuit 72 for a predetermined time, that is, the delay pulse E72 is input. AND gate 70 receives gate signal E68
While the signal is at a high level (FIG. 7, c; t50 to t52, etc.), the delayed pulse E72 is passed. Pulse E72 passed through AND gate 70
Becomes a clock pulse CK70 and is input to the counter 74. The count output D74 of the counter 74 is the shift register 7
Entered in 6. If the count output D74 is, for example, a 10-bit binary code, the shift register 76 is composed of 10 stacks of 7-bit shift registers.

The gate signal E68 output from the MMV68 is input to the MMV78. MMV78 is triggered by a falling edge on signal E68,
Generates a clock pulse CK78 (Fig. 7d). This pulse CK78 clocks the shift register 76. Then,
The count output D74 of the counter 74 is captured in the first bit of each stack of the 10 stack shift register 76.
The data taken in the first bit is the gate signal E6.
It shows the number of clock pulses CK70 counted by the counter 74 while 8 remains high. For example, the period t10 to t12 in FIG. 5q is 0.5 seconds and the frequency f1 of the signal E16 is
Is 1 kHz, the signal E16 during the period t10 to t12 is 500
It becomes a burst signal of waves. In this case, the period t50 in Fig. 7
The number of pulses counted by the counter 74 between 5 and t52 is 5
It becomes 00. Therefore, the data taken into the first bit of the shift register 76 becomes 500 in decimal value conversion.
This "500" indicates the A block first burst signal frequency f1 = 1 kHz of the identification signal E52 in FIG. 5q.

The clock pulse CK78 is also input to the counter 80. By the first pulse CK78 (Fig. 7 d; t52), the content of the count output D80 of the counter 80 is incremented from "000" to "001" (Fig. 7 f; t52 to t56). This pulse CK78
Is slightly delayed by the delay circuit 80, and the clear pulse E8
It becomes 0. After the count result of the counter 74 (“500” in the above example) is taken into the shift register 76 by the pulse CK78, the counter 74 is cleared by the clear pulse E80.

Similarly, the signal pulse E64 corresponding to the identification signal E52
Pattern data f2, f3, t1, t2, t2 and t1 are sequentially captured by the shift register 76. Here, since the frequency f4 of the pattern of the B block is constant, the number of pulses of the pulse E64 remains the same and indicates the signal width t1 or t2 of the burst wave of the B block.

All the data of the identification signal pulse E64 is shift register 76
7 pulses are generated by the time it is captured by the clock pulse CK78 (FIG. 7 d; t52 to t76). When the counter 80 counts 7-pulse CK78, 3-bit output D8 of the counter 80
0 becomes "111" (Fig. 7, f; after t76). Then, the NAND gate 82 is closed and the gate signal E82 of logic "0" (FIG. 7 h; t
76) is input to the AND gate 66. Then, the AND gate 66 is closed, and the counting operations of the counters 74 and 80 are completed.
At this point, the shift register 76 has the identification signal pulse E64.
The storage of the data corresponding to is completed. Based on the stored content D76 (FIG. 7i) of the shift register 76, it becomes possible to automatically determine what the program content of the reproduced tape is.

Below, an example of classification by the identification signal pattern is illustrated.

Content determination based on human hearing is much easier than automatic determination. That is, the output signal E62 of the preamplifier 62 may be appropriately amplified by the power amplifier 84, and the output signal of the power amplifier 84 may be heard via the speaker 86. Now the signal E62
The pattern arrangement of, for example, f1 = 1kHz0.5sec, f2 = 2kHz0.
5 seconds, f3 = 4kHz 0.5 seconds, t1 = 400Hz 1 second, t2 = 400Hz 0.3 seconds, from the speaker 86, "Poo, Pee, Key, Poe,
There is a sound like "po, po, po". If you know in advance what kind of program this sound indicates, you can use a normal tape recorder without using the configuration of FIG.
The contents of the program can be identified. Incidentally, if the determination is to be made automatically, for example, gate pulse P22 in FIG.
By specifying the pulse width of B, the classification data for B block consisting of one burst wave can be obtained.

When the identification signal is arranged in advance on the same track as the program by the method shown in FIG. 1, the identification signal should be easily distinguishable from the signal component of the program. The identification signal based on the audible sound spot signal meets this requirement and is highly practical.

The invention can be applied to a case where an identification signal is recorded on a disk-shaped recording medium such as a floppy disk in addition to a tape-shaped magnetic recording medium such as a cassette tape.

(Effect of device) In this device, not only can the user hear the playback sound and easily judge the contents by hearing without actually loading the program on the computer, but also when the program is loaded on the computer or automatic judgment is performed. If you do
A signal that serves as an identification signal can be recorded at a predetermined location on the software recording medium.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a recording pattern of a program and an identification signal recorded on a magnetic tape by an identification signal recording device for a software recording medium according to an embodiment of the present invention; FIG. 2 is the recording of FIG. FIG. 3 is a diagram showing another example of a pattern; FIG. 3 is a diagram showing an example of a signal pattern of an identification signal; FIG. 4 is a diagram showing the structure of a recording system for recording the signal pattern of FIG. 3 on a magnetic tape; Timing chart explaining the operation of the configuration of FIG. 4; FIG. 6 is a diagram showing the configuration of a reproducing system for decoding the signal pattern recorded by the configuration of FIG. 4; FIG. 7 is the operation of the configuration of FIG. 3 is a timing chart for explaining the above. 1 …… cassette tape, 10 …… identification signal pattern command key, 12 …… ROM, 14 …… D / A converter, 16 to 20,30 …… V
CO (voltage controlled oscillator), 22 to 28,68,78 …… MMV (monostable or one-shot multivibrator), 32 to 44,6
6,70 …… AND gate, 46,56,72,80 …… Delay circuit, 48,76
...... Shift register, 50 …… Clock oscillator, 52 …… OR
Gate 54, master tape recorder 58, program memory 60, playback head 62, preamplifier 64
...... Waveform shaping circuit, 74, 80 …… Counter, 82 …… NAND gate, 84 …… Power amplifier, 86 …… Speaker, E10 ……
Address signal, D12 ... Identification signal data, E14 _{1 to} E14 ₉ ...
… Analog signal, P22 to P28 …… Gate pulse, P12 ……
Initial pulse, P46 …… Shift input pulse, P1 to P8
...... Shift pulse, CK50, CK70, CK78 …… Clock pulse, P48 …… Shift output pulse, P56 …… Program read start pulse, D58 …… Program data, S54 ……
Recording signal, E62 ... playback output signal, E64 ... identification signal pulse, E68 ... gate signal, E72 ... delay pulse, D74, D80
…… Count output, E80 …… Clear pulse.

Claims (1)

[Scope of utility model registration request] 1. An identification signal recording device for a software recording medium for recording an identification signal corresponding to a program content recorded on a software recording medium, and an audible signal generating section for generating an audible signal of a predetermined frequency, and the audible signal generating section. A block signal generating section for generating a block signal composed of the audible signal by extracting an output signal from the signal generating section for a predetermined time; and an identification signal generating section for generating an identification signal including a plurality of the block signals. An identification signal recording device for a software recording medium, comprising: a recording unit that records the output signal from the identification signal generating unit at a predetermined location of the software recording medium.