JPH0438400Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a recording/playback device using a memory device.

[Background technology]

Generally, a tape recorder is used for language learning, and by using it to record and play back one's own pronunciation, it is possible to enhance the learning effect.

However, if the previously recorded pronunciation is immediately played back and confirmed, and this operation is repeated for learning, the recording/playback device becomes complicated.

Therefore, a recording medium using a memory device instead of a tape has been devised. For example, when a sound is detected, the sound data is stored in a memory device, and when the sound stops, the stored data is read out to perform recording and playback. Such a device does not require complicated recording/playback operations unlike a tape recorder.

However, once the recorded data is played back, the device enters the recording mode, and the number of times the recorded data is played back cannot be changed as appropriate.

[Purpose of invention]

Taking the above facts into consideration, the present invention enables repeated recording and playback without complicated operations, allows the number of playbacks of recorded data to be changed as appropriate with a simple configuration and operation, and has a playback setting means. It is an object of the present invention to obtain a recording and reproducing device capable of issuing a warning when the device is operated for a predetermined period of time or more.

[Structure of the idea]

The recording and reproducing apparatus according to the present invention includes: an audio input means including an A/D conversion means for converting audio into a digital signal; an audio detection device for detecting an audio signal; and a storage means for storing the audio converted into a digital signal. , audio output means including a control means for controlling input/output of the digital signalized audio to the storage means, and a D/A conversion means for converting the digital signal read from the storage means into an analog signal. In the recording and playback device, a playback number setting means that can vary the number of playbacks depending on the length of the operating time;
An alarm means is provided for issuing a warning when the operating time of the reproduction number setting means exceeds a specified time.

[Embodiment of the invention] An embodiment of the recording and reproducing apparatus according to the invention will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, wiring from each output terminal of an audio input means 12, an audio detection device 14 that is a recording switch, and a playback number setting switch 16 is connected to an input terminal of a microcomputer 10 that is a storage control device. There is. Further, wiring from the input terminals of the audio output means 20 and the low frequency oscillator 21 is connected to the output terminal of the microcomputer 10.

This audio input means 12 has a configuration in which a wiring from an output terminal of a microphone 22 is connected to an input terminal of an A/D converter 28 via an amplifier 24 and a low-pass filter 26. Furthermore, the audio output means 20 has a configuration in which wiring from an output terminal of a D/A converter is connected to an input terminal of a speaker 30 via a low-pass filter 32 and an amplifier 34.

Control signal lines 38 and 40 from the output terminal of the microcomputer 10 are connected to the input terminals of the A/D converter 28 and the D/A converter 30, respectively. Further, a wire from an output terminal of an amplifier 24 is connected to an input terminal of the audio detection device 14, and a wire from an input terminal of an amplifier 34 is connected to an output terminal of the low frequency oscillator 21.

The microcomputer 10 has a central processing unit, memory, controller, input/output interface, and power supply unit (not shown), and is capable of data storage, logical judgment, calculation, and input/output of data and control signals with external equipment. It is becoming.

The audio input means 12 converts the sound pressure level into a minute voltage signal using the microphone 22, amplifies the voltage of this signal using the amplifier 24, and outputs the signal from the A/D converter 28 included in this voltage signal. A low-pass filter 26 removes sampling aliasing noise, and then this voltage signal is converted into a digital signal by an A/D converter 28.

The audio detection device 14 outputs a logic "1" signal when the input voltage from the amplifier 24 exceeds a certain level, and outputs a logic "0" signal when this input voltage falls below a certain level for a certain period of time or more. It's summery.

Playback number setting switch 16 which is playback number means
is an automatic return type push button switch, and the a of the switch is
When the contact closes, a logic "1" signal is input to an input interface (not shown) in the microcomputer 10, and when the contact opens, a logic "0" signal is input thereto. It's becoming like that. Further, the rise of this logic "1" signal serves as an interrupt signal to the central processing unit.

The audio output means 20 converts the digital signal into an analog voltage signal using the D/A converter 30, and passes the stepped voltage waveform at the time of conversion through a low-pass filter.
32, this shaped signal is power amplified by an amplifier 34, and then a speaker 36 is made to sound by this signal.

The low frequency oscillator 21 is connected to the microcomputer 1
A low frequency signal is output only when a signal of logic 0 to 1 is input. Furthermore, once the central processing unit in the microcomputer 10 outputs a bit to the low frequency oscillator 21, an off-delay timer in the output interface outputs a logic "1" signal to the low frequency oscillator 21 for a certain period of time. It is becoming more and more like this. Therefore, once the central processing unit outputs bits to the low frequency oscillator 21, the low frequency output signal from the low frequency oscillator 21 is power amplified by the amplifier 34, and an electronic sound of a constant frequency is output from the speaker 36 for a certain period of time. It is becoming more and more common.

Next, a memory (not shown) in the microcomputer 10 stores a program corresponding to the flow shown in FIGS. 2 and 3, and the operation of this embodiment will be explained according to this flowchart.

To explain the outline of this flowchart, the second
The figure shows the normal flow, and FIG. 3 shows the flow of interrupt processing. In the normal flow,
A recording standby routine 50 waits for the output signal of the voice detection device 14 to turn on, a recording processing routine 52 performs recording, and when the recording is completed, a reproduction processing routine 54 immediately performs reproduction. Then repeat the above steps. When the number of reproductions setting switch 16 is turned on, an interrupt is generated to the central processing unit, and the number of reproductions is set by the interrupt processing routine 56 from the time the number of reproductions setting switch is on. Then, the process enters the beginning of the normal flow of the reproduction processing routine 54. This interrupt is designed to occur at any step in the normal flow except for the recording processing routine 52.

Next, this flowchart will be explained in detail.

As shown in FIG. 2, in step 60 of the recording wait routine 50, the central processing unit within the microcomputer 10 reads bit data from the voice detection device 14 from the input interface. Next, in step 62, it is determined from this data whether the output of the voice detection device 14 is on or off. If this is off, return to step 60. If this is on, the recording processing routine 52
Enter.

In this recording processing routine 52, in step 66, recording address data in the memory is set to a start value. Then, in step 68, the central processing unit reads the voice converted into a digital signal by the voice input means 12 from the input interface. This reading is performed at fixed time intervals using a soft timer or a hard timer to avoid wasteful use of memory.

That is, after waiting for a certain period of time to elapse, the central processing unit outputs an A/D conversion start signal to the control signal line 38, and the A/D converter samples audio analog data based on this signal, completing the A/D conversion. After the central processing unit confirms that this has been done and writes this digital data to the memory at the address indicated by the recording address data, the control signal line 3
An A/D conversion completion signal is output to 8. This causes the A/D converter to reset the held data.

Then, in step 70, the voice detection device 14
The central processing unit reads the bit data from the interface. Then, in step 72,
Based on this data, the output of the voice detection device 14 is turned on/off.
Determine off. If this is on, the recording address data is incremented in step 74, and then in step 76 it is determined whether the value of this recording address data exceeds the value of the recording area end address of the memory. If this is not exceeded, the process returns to step 68 and repeats the recording process.

If it is determined in step 72 that the output of the voice detection device 14 is off, or if it is determined in step 76 that the value of the recording address data exceeds the value of the recording area end address, the next playback processing routine is executed. Enter 54.

Therefore, once recording is completed, playback will begin immediately without any playback operation.

In this routine 54, first, in step 78, the reproduction address data in the memory is set to a start value. Next, in step 80, the central processing unit outputs the data in the memory at the address indicated by the reproduction address data to the audio output means 20 via the output interface. Then, the audio output means 20 converts this data into audio. In this way, the audio data stored in the memory is played back.

Here, the D/A conversion in the audio output means 20 is performed at the same time intervals as in the case of A/D conversion. That is, after waiting for a certain period of time to elapse, the central processing unit outputs the recorded data and then outputs a D/A conversion start signal to the D/A converter via the control signal line 40, and after this certain period of time has elapsed, the central processing unit outputs the recording data. A D/A conversion reset signal is output to the D/A converter via line 40. As a result, a stepped voltage signal is output from the D/A converter.

Next, in step 82, the reproduction address data in the memory is incremented, and in step 84, it is determined whether the value of this data exceeds the value of the address data, that is, whether the reproduction of the previously recorded data has been completed. . If this has not been completed, the process returns to step 80 and repeats the recording data playback process. If this has been completed, in step 86 it is determined whether the regeneration flag is set. If this has been set, the process returns to step 78 and repeats this reproduction process.

Therefore, if the playback flag is set,
The recorded data will be played back many times due to an interrupt unless the playback flag is reset in an interrupt processing routine to be described later.

If the playback flag has been reset in step 86, the process returns to step 60 at the beginning of this flowchart and repeats the above process.

Therefore, if the reproduction flag is reset, reproduction will be performed only once.

Next, when the playback count setting step 16 is turned on at any step in this normal flow,
The interrupt processing routine 56 shown in FIG. 3 is entered.

In this routine 56, in step 100,
Set the interrupt mask to disable multiple interrupts.
It also resets the playback flag. Next, in step 102, the chattering that occurs when the playback number setting switch 16 is turned on is removed by software. This is done by waiting for a certain amount of time to elapse. Next, in step 104, a soft or hard timer is set. Next, in step 106, it is determined whether this timer has timed up. If the time has not expired, in step 108, the central processing unit reads the bit data from the playback number setting switch 16 from the interface, and in step 110, it is determined from this data whether the playback number setting switch is on or off. If this is on, return to step 106.

If this is off, that is, if the playback number setting switch 16 is turned off before time-up, in step 112, the chattering that occurs when the playback number setting switch 16 is turned off is removed by software as described above. Then step 114
At this point, the interrupt mask is reset, the interrupt is canceled, and the process goes to step 78, which is the beginning of the playback routine 54 in FIG.

Therefore, if the time during which the reproduction number setting switch 16 is pressed is within the specified time, the reproduction flag is reset, and after the recorded data is reproduced once, the recording standby state is entered.

Next, in step 106, even if the timer has timed out, if the playback count setting switch 16 is still on, in step 116, the central processing unit turns on the low frequency oscillator 21 via the interface, and An electronic sound is generated from the time speaker 36. Then, in step 118,
After setting the reproduction flag and performing the processing in step 114, the process advances to step 78 at the beginning of the reproduction routine 54.

Therefore, if the playback number setting switch 16 is pressed for a predetermined time or more, the playback flag is set and the recorded data will be played back many times. At the same time, an electronic sound is emitted from the speaker 36 to alert the user. Then, an interruption occurs during playback, the playback flag is reset, and after that, the data is played back once, thereby entering a recording standby state.

Note that the flowchart in the above embodiment is not limited to the one shown in the drawings, and can be applied to any method as long as the number of reproductions is set by the operating time of the reproduction number setting switch. For example, instead of using the input of the playback count setting switch 16 to the microcomputer 10 as an interrupt input, in FIG.
It is also possible to determine whether it is off, and if it is off, go to step 60, and if it is on, go to step 60 after performing the series of processes shown in FIG. In this case, it is determined whether the reproduction number setting switch is on or off in any of steps 80 to 84, and only when it is on, the recording processing waiting routine 50 is entered. In this example, if the reproduction flag is set, turning on the reproduction number setting switch immediately exits the reproduction processing routine and enters a recording standby state. Moreover, since the playback flag is not reset upon escape, recording and playback operations become easier.

Also, for example, if the time that the playback count setting switch is pressed is within a specified time, the number of playbacks is set in proportion to that time, and when the time that the switch is pressed exceeds the specified time. Reproduction may be repeated many times as in the above embodiment. In this case, the number of playbacks may be confirmed by intermittent warning sounds.

This warning sound can be generated by the sound output means 20 without particularly providing a low frequency oscillator as shown in FIG.
The electronic sound may be generated from the speaker 36 by outputting pulses to the speaker 36 in a soft manner.

Furthermore, the alarm may be provided by lighting or blinking a lamp without generating an electronic sound.

[Effect of idea]

In the recording and playback device according to the present invention, it is possible to select whether to play once or repeatedly depending on the operating time of the playback number setting switch, so it is possible to select whether to play once or repeatedly. The number of playbacks of the recorded data can be changed as appropriate with a simple operation without requiring any action, and an alarm is issued when the number of playback setting switch is pressed for more than a specified time, so the user does not have to press any keys more than necessary. It has excellent effects such as:

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the recording/playback device according to the present invention, and FIGS.
This is a flowchart corresponding to a program stored in the memory in the microcomputer 10 shown in the figure. 10...Microcomputer, 12...Audio input means, 14...Audio detection device, 16...Playback number setting switch (playback number setting means), 20...
...Audio output means.

Claims (1)

[Claims for Utility Model Registration] A voice input means including an A/D conversion means for converting voice into a digital signal, a voice detection device for detecting the voice signal, and a storage means for storing the voice converted into a digital signal; A recording comprising a control means for controlling the input/output of the digitally converted audio to the storage means, and an audio output means including a D/A conversion means for converting the digital signal read from the storage means into an analog signal. The playback device is characterized by being provided with a playback number setting means that can vary the number of playbacks depending on the length of the operating time, and an alarm means that issues a warning when the operating time of the playback number setting means exceeds a specified time. Recording and playback device.