JPH10116100A - Voice recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voice recording and reproducing device capable of discriminating by a simple method whether a memory card is mounted on the prescribed place of the equipment body. SOLUTION: This device is such that a memory card 33 is mounted on the prescribed place of the equipment body, with voice data recorded on the memory card 33 or with the voice data so recorded reproduced. In this case, the device is provided with the main control circuit 6 which, with the memory card 33 mounted on the equipment body, detects information indicating the state of contact between the contact point of the memory card 33 and that of the equipment body, and which discriminates whether the memory card 33 is mounted on the prescribed place of the equipment body; the device is also provided with an indicator 8 which indicates the uninserted state of the card when the memory card 33 is found unmounted on the prescribed place of the equipment body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an audio recording / reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, an audio signal obtained by a microphone or the like is converted into a digital signal and recorded on a recording medium such as a semiconductor memory. 2. Description of the Related Art An audio recording / reproducing apparatus called a so-called digital recorder, which converts a signal into a signal and outputs the audio as a sound using a speaker or the like, has been developed. Japanese Patent Application Laid-Open No. 63-259700 discloses such an audio recording / reproducing apparatus. By performing highly efficient encoding on a digitized audio signal, the amount of data generated can be reduced as much as possible. Thus, the amount of data recorded on the recording medium is saved.

[0003] As a recording medium for recording an audio signal, a memory card which is detachable from an apparatus has recently been used. When a memory card is used as a recording medium, it is necessary that the memory card is correctly attached to the device because it is detachable.
Japanese Patent Laying-Open No. 5-174200 discloses a method of checking a connection state of an address line in detecting a contact failure of a memory card.

[0004]

However, the above-mentioned conventional audio recording / reproducing apparatus cannot detect whether or not the memory card is inserted into a predetermined portion of the device main body by a simple method.

The audio recording / reproducing apparatus of the present invention has been made in view of such a problem, and an object of the present invention is to check whether a memory card is mounted at a predetermined position of a device body by a simple method. It is an object of the present invention to provide an audio recording / reproducing apparatus capable of detecting whether or not the information is available and notifying the user of the fact.

[0006]

In order to achieve the above-mentioned object, an audio recording / reproducing apparatus according to a first aspect of the present invention mounts a memory card on a predetermined portion of a device main body, and stores audio data in the memory card. It is for recording or reproducing audio data recorded on the memory card, and when the memory card is mounted on a device body, a contact provided on the memory card and a contact provided on the device body. Determining means for detecting information indicating the contact state of the memory card and determining whether or not the memory card is mounted at a predetermined location of the device main body; and wherein the memory card is mounted at a predetermined location of the device main body. Notification means for performing predetermined notification when it is determined that there is no notification.

In the audio recording and reproducing apparatus according to a second aspect of the present invention, in the audio recording and reproducing apparatus according to the first aspect, the determination by the determining means includes detecting a change in a voltage of a contact provided on the device body. I do.

The audio recording and reproducing apparatus according to a third aspect of the present invention is the audio recording and reproducing apparatus according to the first or second aspect, further comprising a predetermined operation member, and wherein the memory card is provided on the device main body. When the predetermined operation member is operated when the camera is not mounted at the position, a predetermined notification is performed.

That is, in the audio recording and reproducing apparatus according to the first invention, when recording or reproducing audio data by attaching a memory card to a predetermined portion of an apparatus main body,
When the memory card is mounted on the device main body, information indicating a contact state between a contact provided on the memory card and a contact provided on the device main body is detected, and the memory card is placed at a predetermined position on the device main body. It is determined whether or not the memory card is attached to the device main body, and when it is determined that the memory card is not attached to a predetermined portion of the device main body, a predetermined notification is performed.

The audio recording and reproducing apparatus according to a second aspect of the present invention is the audio recording and reproducing apparatus according to the first aspect of the present invention, wherein the memory card detects a change in the voltage of a contact provided on the device body. It is determined whether or not is mounted on a predetermined portion of the device main body.

[0011] The audio recording / reproducing apparatus according to the third invention is the audio recording / reproducing apparatus according to the first or second aspect, wherein the memory card is provided when the memory card is not attached to a predetermined portion of the device main body. When the operation member is operated, a predetermined notification is performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an audio recording / reproducing apparatus according to one embodiment of the present invention. In the figure, a microphone 1 to which sound is input
Is a microphone amplifier 2 and a low-pass filter (LPF) 3
And a main control circuit (CPU) via an analog switch 26 and an analog / digital (A / D) converter 4.
6 is connected to the D1 terminal. The analog switch 26 is connected to the control terminal E1 of the main control circuit 6,
It is controlled to be turned on during recording. The main control circuit 6 has a digital signal processing unit (hereinafter referred to as DSP) 5 built therein, and the A / D converter 4 is connected via the D1 terminal.
Is input to the DSP 5. Here, DSP5
May be provided separately from the main control circuit 6.

A speaker 1 as a sound output means
3 is an analog switch 30 and an amplifier (AMP) 12
And a digital / analog (D / A) converter 11 connected to the D2 terminal of the main control circuit 6. DSP
5 from the D / A converter 11 via this D2 terminal.
Is input to The analog switch 30 is connected to the E2 terminal of the main control circuit 6, and is controlled to be turned on during reproduction.

The E3 terminal of the main control circuit 6 is connected between the amplifier (AMP) 12 and the analog switch 30 via the analog switch 27. The analog switch 27 is connected to a voltage supply terminal of a variable resistor (volume) 28, and is controlled to be turned on when the state of the variable resistor 28 is detected.

An analog switch 29 is connected to the terminal E4 of the main control circuit 6. The analog switch 29 is connected between the A / D converter 4 and the analog switch 26, and is also connected to an intermediate tap terminal of the variable resistor 28. The analog switch 29 is a variable resistor 2
At the time of detecting the state of No. 8, the control is made to be turned on.

The D3 terminal of the main control circuit 6 is connected to the memory control circuit 7 inside the card when the removable memory card 33 is inserted into the apparatus, and the D4 terminal is connected to the semiconductor memory unit 10. The memory control circuit 7 is directly connected to the semiconductor memory unit 10 for supplying a control signal, and is also connected to the semiconductor memory unit 10 via a switch 31 for write protection.

The above-described semiconductor memory section 10 includes a temporary recording medium section 100a and a main recording medium section 100b.
Usually, a flash memory is used for the main recording medium unit 100b, but a magneto-optical disk, a magnetic disk, a magnetic tape, or the like may be used. Also, the temporary recording medium unit 100
As a, an SRAM, a DRAM, an EEPROM, a high-dielectric memory, a flash memory, or the like which can read and write data at a relatively high speed as compared with the main recording medium unit 100b is used. In the present embodiment, it is assumed that a flash memory is used for both the main recording medium unit 100b and the temporary recording medium unit 100a.

The E5 terminal of the main control circuit 6 is connected to a light emitting diode (LED) 17 for outputting infrared rays. The light emitting diode (LED) 17 has a function as a transmitting unit that transmits voice encoded data recorded in the semiconductor memory unit 10 and that transmits a signal indicating that external data can be received. The light emitting diode (LED) 17 is used not only for transmitting and receiving data, but also as a display which emits light when sound is input or output during recording or reproduction. Therefore, the light emitting diode contains a large amount of visible light component, and has a peak wavelength of, for example, 500 nm to 1000 nm, preferably 600 nm to 8 nm.
A device that outputs infrared light having a relatively low wavelength of 00 nm is used.

Further, a D5 terminal of the main control circuit 6 is provided with a switch RA for switching a coding rate at the time of voice coding.
The terminal D6 is connected to the driving circuit 9 while being connected to the TE35.
Is connected to the display unit 8 via the.

The terminal D7 of the main control circuit 6 is connected between the pin diode 14 and the resistor 15 via a voltage comparator (COMP) 16. Here, the pin diode 14, the voltage comparator 16 and the resistor 15 constitute a data receiving means for receiving a data transfer start signal and audio data from outside.

The D8 terminal of the main control circuit 6 is connected to the contact a of the main power switch 19. The contact b of the main power switch 19 is connected to the DC- terminal connected to the terminal D10 of the main control circuit 6.
The fulcrum of the main power switch 19 is connected to a battery (BAT) 18 while being connected to the DC converter 20. Further, a relay switch 25 connected to the D9 terminal of the main control circuit 6 is connected in parallel with the main power switch 19.

The above-described DC-DC converter 20 outputs a boosted voltage from the battery 18 and supplies a stable power supply voltage to each unit.
A signal is sent to notify whether the voltage of the battery 18 is below a certain value. Thus, the main control circuit 6 can detect the state of consumption of the battery 18. A relay switch 25 connected in parallel with the main power switch 19
This is to prevent the power supply from the battery 18 from immediately stopping even when the main power switch 19 is turned off.

Further, the terminal D11 of the main control circuit 6 is connected to the anode of the diode 21, and a parallel circuit of a capacitor 22 and a resistor 23 is connected between the cathode of the diode 21 and the ground. further,
The cathode of the diode 21 is connected to the base of the transistor 24. The collector of the transistor 24 is connected between the microphone 1 and the microphone amplifier 2,
The emitter is connected to ground.

Further, the main control circuit 6 includes a record button RE.
C, play button PL, stop button ST, fast forward button F
F, operation buttons (operation members) such as a fast reverse button REW, an erase button ERASE, and a voice activation (voice active detector) button VAD are connected.

Here, the main control circuit 6, in addition to controlling the above-described units, determines whether the level of the input voice is above or below the reference level in units of frames to be coded. When the level is equal to or higher than the level, it is regarded as having sound, and when the level is equal to or lower than the reference level, it is regarded as having no sound. By providing a certain reference level in this way, it is possible to determine whether the input voice is sound or no sound. Note that determining “silence” does not necessarily mean that the audio level is zero. As described above, a certain reference level is set, and when it is lower than the reference level, it is determined that “no sound”. Thus, it is possible to treat it as synonymous with "silence".

The variable resistor 28 is used as a means for changing the reference level when the main control circuit 6 determines whether the audio signal is sound or no sound. Further, the main control circuit 6 changes the start or stop timing of the recording as described above, and the variable resistor 28 is used to change the timing at this time.

FIG. 2 is an external view of the audio recording / reproducing apparatus.
(A) is a left side view of the audio recording / reproducing apparatus, (b) is a front view, (c) is a right side view, and (d) is a top view.

FIG. 3 is a diagram specifically showing a connection portion in the configuration of the memory card 33 used by being mounted on the audio recording / reproducing apparatus. In use, the memory card 33 is inserted from the back of the audio recording / reproducing device (the portion indicated by arrow A in FIG. 2A). At this time, the terminal patterns corresponding to the memory card connection portion 34 are connected to the D12 and D13 terminals of the main control circuit 6, and the voltage detecting recesses of the memory card connection portion 34 shown in the drawing are connected to the device side, and It is detected whether the operating voltage of the card 33 is 3.3V or 5V. At this time, the switch 31 is turned on.
In this case, the ground signal is supplied to the memory control circuit 7, and the memory control circuit 7 responds to this to notify the main control circuit 6 that data cannot be written to the memory card 33.

The recording / reproducing operation of the audio recording / reproducing apparatus having the above configuration will be described below. At the time of audio recording, an analog audio signal obtained from the microphone 1 is amplified by the microphone amplifier 2, the frequency band is limited through the LPF 3, and then converted to a digital signal by the A / D converter 4 via the analog switch 26. The signal is converted and input to the DSP 5 inside the main control circuit 6.

Here, when the audio signal input from the microphone 1 is higher than a predetermined reference level, for example, A /
When it is larger than -6 dB of the maximum range of the D converter 4,
When a pulse is output to the diode 21 connected to the terminal D11 of the main control circuit 6, electric charges are accumulated in the capacitor 22 and a voltage is applied to the transistor 24. As a result, the impedance between the microphone amplifier 2, the transistor 24, and the ground changes, the signal input to the microphone amplifier 2 is limited, and the gain is adjusted. The electric charge stored in the capacitor 22 is gradually discharged via the resistor 23.

Next, the DSP 5 compresses the input digital signal in accordance with the operation of a plurality of operation buttons and switches connected to the main control circuit 6, and compresses the compressed audio data into the main control circuit 6. The data is recorded in the semiconductor memory unit 10 through the D4 terminal. At this time, an address at which audio data is to be recorded is given to the memory control circuit 7 from the D3 terminal.
The write operation is controlled by the memory control circuit 7.

On the other hand, at the time of reproduction, the main control circuit 6 reads out audio data recorded in the semiconductor memory section 10 under the control of the memory control circuit 7 and supplies it to the DSP 5 for decompression. The audio data expanded by the DSP 5 is D / A
The signal is converted into an analog signal by the converter 11 and the AMP 12
After that, the signal is output from the speaker 13 as sound.

In the above-described sound recording and reproducing operations,
The main control circuit 6 controls the drive circuit 9 to cause the display 8 to display various information such as an operation mode. Hereinafter, with reference to a flowchart shown in FIG. 4, main operations of the above-described audio recording / reproducing apparatus will be described based on operations of the main control circuit 6.

When the battery 18 is set and power is supplied, the main control circuit 6 first initializes the external conditions of the main control circuit 6 and the internal storage unit (step S1). While this initialization is being performed, the character “CHECK” indicating that initialization is being performed is displayed on the display 8 as shown in FIG. After completing the initialization, the main control circuit 6 detects whether the power supply voltage of the battery 18 is a rated value (step S2). The rated value at this time is set to, for example, 1 V, and the main control circuit 6 determines whether or not the power supply voltage of the battery 18 is 1 V or more, or
DC-DC whether the impedance of
It is detected based on information from the converter 20. That is,
A detection signal relating to the state of the battery 18 is input to the D10 terminal of the main control circuit 6, and it is detected whether or not the battery 18 has a usable capacity.

As a result of the detection in step S2, if it is detected that the battery 18 is in a usable state, a card recognition process (S23) for determining whether the memory card 33 is mounted on the audio recording / reproducing apparatus or the like. ).

If it is detected in step S2 that the battery 18 is not in a usable state, the power supply to the entire audio recording / reproducing apparatus is stopped, and the battery 18 and each circuit are disconnected. Then, a switch (not shown) provided between them is turned off, and the fact that there is no capacity of the battery 18 is displayed on the display 8 (for example, a liquid crystal display unit) as a notification unit via the drive circuit 9. Then, it waits in this state until a usable battery 18 is set.

Next, the subroutine of the card recognition process shown in step S23 will be described with reference to FIG. When the process proceeds to the subroutine process from step S23 to step S30, first, the main control circuit 6 as a determining unit determines whether or not the D13 terminal as a contact provided on the device main body is connected to the memory card 33. (Step S31). A specific determination method using this determination means is that a metal part as a contact provided on the memory card 33 exposed on the side surface of the memory card 33 and connected to the ground is connected to the D13 terminal. It is determined by whether or not the spring is in contact. If the voltage applied to the D13 terminal remains at the power supply voltage (High), D1
It is determined that the three terminals are not connected to the metal part of the memory card 33 via the metal spring, and the process shifts to step S36.

On the other hand, if the voltage applied to the D13 terminal changes from the power supply voltage (High) to the ground (ground) voltage (Low), it is determined that the D13 terminal is connected to the metal part of the memory card 33 via the metal spring. Move to step S32.

According to this determination method, it is not necessary to constantly monitor the connection state between the contacts when the memory card 33 is inserted, and the power supply voltage is applied to the memory card 33 after the memory card 33 and the sound recording / reproducing device are securely connected. Can be supplied, so that destruction of data recorded in the memory card 33 can be prevented.

In step S32, D in step S31
The connection state between the D12 terminal as a contact provided on the apparatus main body and the memory card 33 is determined by a method similar to the method for determining the connection state between the 13 terminals and the memory card 33 (step S32).

If the D12 terminal is not connected to the terminal pattern of the memory card 33 via the conductive rubber connector, the process proceeds to step S36, and the D12 terminal is connected to the terminal pattern of the memory card 33 via the conductive rubber connector. If connected, the process moves to step S33.

In step S36, a predetermined notification is made to inform the user that the memory card 33 is not mounted at a predetermined location on the main body of the device. That is, the fact that the memory card 33 has not been inserted is displayed on the display 8 as a notifying means as shown in FIG. When the operation button is erroneously pressed in a state where the memory card 33 is not attached to the audio recording / reproducing apparatus, in addition to the above-mentioned display, a warning sound such as 1 kHz
A signal with a duty ratio of 50% at a period of 60 msec
The sound is emitted from the speaker 13 for 0 msec. As described above, the notification means is not only a character display as shown in FIG.
It also includes operations such as generating a warning sound.

Then, from step S36 to step S4
5 to exit this routine, and then to step S9 in the flowchart shown in FIG. If it is determined that the memory card 33 is mounted on the audio recording / reproducing apparatus, the process proceeds to step S33, and the external shape of the memory card 33 is detected using a micro switch. Then, the power supply voltage (5 V, 3.3 V) at which the memory IC built in the memory card 33 operates is detected from the outer shape of the memory card 33, that is, the shape of the voltage detecting recess.
It is determined whether this memory card 33 can be used (step S34). For example, if the power supply voltage to be supplied is 3.
In the case of 3V, the memory card 33 must be of the 3.3V specification.

Here, when a memory card 33 other than the 3.3V specification is inserted into the audio recording / reproducing apparatus, it is determined that the power supply voltage to be supplied is not correct, and the flow shifts to step S37. In step S37, an error display indicating that the memory card 33 cannot be used is displayed on the display 8 as shown in FIG. Further, if the operation button is pressed by mistake while the unusable memory card 33 is attached to the audio recording / reproducing device, in addition to the above display,
Warning sound as predetermined notification, for example, 1 kHz 60 msec
Signal with a duty ratio of 50% for 180 msec
During this time, the speaker 13 emits sound.

Then, steps S37 to S4
5 to exit this routine, and then to step S9 in the flowchart shown in FIG. Step S3
When it is determined that the memory card 33 that can be used in Step 4 is mounted on the audio recording / reproducing apparatus, a power supply voltage is supplied to the memory card 33 (Step S35), and Step S38 is performed.
Move to

In step S38, in order to detect the type of the memory medium mounted on the memory card 33, the main control circuit 6 as reading means reads the register information of the memory as the memory device information. Then, the type of the memory medium is detected based on this information.

That is, for example, when the read hexadecimal data is 9888H, it is determined that the read data is an EEPROM (flash memory), and the flow advances to step S43. Even if the AA55H is used, it is determined that the AA55H is an EEPROM (flash memory) and the process proceeds to step S43, and the memory size (capacity) of the memory card 33 is determined.
After the information for recognizing the control method and the control method is stored in the main control circuit 6, the process proceeds to step S40.

If it is 9090H, it is determined that it is an SRAM, and the flow shifts to step S42. And
After storing information for recognizing the memory size (capacity) of the memory card and the control method in the main control circuit 6, the process proceeds to step S40.

If it is 0H, it is determined that it is a ROM or a write-protected EEPROM (flash memory), and the flow shifts to step S44. Then, after storing information for recognizing the memory size (capacity) of the memory card and the control method in the main control circuit 6, step S4 is performed.
Move to 0.

Further, when the read hexadecimal data is other than the above-mentioned value, the process proceeds to step S37 and FIG.
And an alarm sound, for example, with a duty cycle of 50% at a cycle of 1 kHz 60 maec.
Is emitted from the speaker 13 for 180 msec. Thereafter, the flow shifts to step S45 to exit this routine, and shifts to step S9 in the flowchart shown in FIG.

In step S40, after writing data in the memory card 33, the written data is read, and it is determined whether or not the memory card 33 can be used for normal reading and writing. Check the data bus connection. In particular, when a block erase batch type nonvolatile memory is used, the write data is recorded in the temporary recording medium unit 100a.

If the data read from the memory card 33 is not correct in step S40, the process proceeds to step S37.
Move to If the data read from the memory card 33 is correct, the process moves to step S46 and exits from this routine.

Thereafter, the process proceeds to step S4 in FIG. 4, where the data stored in the semiconductor memory unit 10 of the memory card 33 is read, and the index is normally recorded in the semiconductor memory unit 10 based on the read data. That is, it is determined whether or not the format of the semiconductor memory unit 10 is normal. If an unformatted one is inserted as the semiconductor memory unit 10, it is determined that the memory format is not normal, information indicating usage conditions is input to the index unit of the semiconductor memory unit 10, and It is confirmed whether or not to perform a memory format (initialization) as a process of inputting "0" (step S5). That is, the display circuit 8 controls the drive circuit 9 to display a confirmation as to whether or not to perform the memory format.

In step S5, when the button for instructing the execution of the memory format is not pressed within a predetermined time, the driving circuit 9 is controlled to indicate on the display 8 that the semiconductor memory section 10 is not normal. An error display is performed (step S8). Here, FIG.
"ERROR" is displayed, and the corresponding number is set to N to indicate the part where the error has occurred.
o. Is displayed with the characters The state at that time and the method of treatment are indicated by numbers in the middle row. At the same time, an indication that the semiconductor memory unit 10 should be replaced is displayed. Further, a switch (not shown) provided between the battery 18 for supplying power to the entire audio recording / reproducing apparatus and each circuit is turned off. Thereafter, in order to replace the semiconductor memory unit 10, it waits for the main power switch 19 to be turned off (step S9). When it is detected that the main power switch 19 is turned off, the relay switch 25 is turned off (step S9). S22), and return to step S2.

On the other hand, when it is determined in step S4 that the memory format is normal, or in step S6
After the formatting process is completed, the process proceeds to step 7 to display the completion of the initial setting, and then the semiconductor memory unit 10
The current operation position is detected based on the information read from the index section (step S10). Thereafter, each circuit is set in a waiting state while detecting whether any of the operation buttons of the audio recording / reproducing apparatus is pressed (step S11).

In this step S11, when it is detected that any one of the operation buttons is pressed, it is first detected whether or not the operated button is the record button REC (step S12). For example, DSP
5 to compress the audio information input from the A / D converter 4 and control the memory control circuit 7 to control the semiconductor memory unit 1
The recording process for recording in the audio data portion of 0 is started (step S13).

If the operated button is not the record button REC, the play button PL is detected next (step S14). Here, if the play button PL is pressed, the memory control circuit 7 is controlled to
0, read out the recorded data from the audio data part, send the data to the DSP 5 and perform decompression processing, and then enter a reproduction processing for transmitting audio information to the D / A converter 11 (step S).
15).

If the play button PL has not been pressed, it is detected whether the fast forward button FF has been pressed (step S16). If the fast-forward button FF is pressed, a fast-forward process is performed in which the operation position is sequentially fast-forwarded at an appropriate speed, for example, 20 times the speed of reproduction (step S17). If the fast-forward button FF has not been pressed, it is detected whether or not the fast-return button REW has been pressed (step S18). If the fast-return button REW has been pressed, a fast-return process for moving the operating position at the same speed as in the fast-forward operation starts (step S19).

Steps S13, S15, S17, S
When the stop button ST is pressed in each of the processes 19, the process exits from each process and returns to the step S11. If the operated buttons are not operation buttons for recording, reproduction, fast forward, fast rewind, etc., the main power switch 19 is turned off or the state of various setting buttons is detected (step S20). In step S20, when the power of the main power switch 19 is turned off, the information in the index section of the semiconductor memory section 10 is updated by controlling the memory control circuit 7.
The index information stored in the storage unit (not shown) inside the main control circuit 6 is transferred to the index unit of the semiconductor memory unit 10 (Step S21). When the index transfer process is completed, the entirety of the audio recording / reproducing apparatus, that is, the relay switch 25 that supplies power to each circuit is turned off (step S22).

If it is determined in step S20 that the main power switch 19 is not turned off, the setting button is detected, the state is stored in an internal storage unit, and the process returns to step S11. Here, the setting button is not a button actually provided in the audio recording and reproducing apparatus, but a recording button REC, a reproducing button PL, a stop button ST, a fast forward button FF, a fast rewind button REW, an erase button ERASE, and a voice activation ( Silence compression) button VAD
Of these, the button is substituted by several simultaneous presses.

According to the above-described embodiment, it is possible to detect whether or not a memory card is inserted in a predetermined portion of a device main body by a simple method, and to notify the user by displaying it on a display or the like. . In addition, when the operation button is pressed in a state where the memory card is not mounted, a warning sound is also generated in addition to the above display, so that the user can easily know that the memory card is not mounted.

Further, since the mounting state of the memory card is detected based on the change in the voltage of the contact provided on the device main body, it is not necessary to constantly monitor the connection state between the contacts when the memory card is mounted.

[0063]

According to the first aspect of the present invention, it is possible to detect whether or not a memory card is attached to a predetermined portion of a device main body by a simple method and notify a user of the fact.

According to the second aspect of the present invention, in addition to the effect of the first aspect, it is not necessary to constantly monitor the connection state between the contacts when the memory card is mounted. According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the user can easily know that the memory card is not inserted.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an audio recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is an external view of an audio recording / reproducing apparatus.

FIG. 3 is a diagram specifically illustrating a connection part in the configuration of the memory card.

FIG. 4 is a flowchart for explaining main operations of the audio recording / reproducing apparatus based on operations of a main control circuit.

FIG. 5 is a flowchart illustrating details of a card recognition process.

FIG. 6A is a diagram showing display contents during initialization;
(B) is a diagram showing a display content when an error occurs, and (c) is a diagram showing a display content when a card is not inserted.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Microphone, 2 ... Microphone amplifier, 3 ... Low-pass filter, 4 ... A / D converter, 5 ... DSP, 6 ... Main control circuit, 7 ... Memory control circuit, 8 ... Display, 9 ... Drive circuit,
DESCRIPTION OF SYMBOLS 10 ... Semiconductor memory part, 11 ... D / A converter, 13 ... Speaker, 18 ... Battery, 19 ... Main power switch, 25 ... Relay switch, 33 ... Memory card, 34 ... Memory card connection part.

Claims (3)

[Claims] 1. A memory card is mounted on a predetermined portion of a device main body, and audio data is recorded on the memory card, or audio data recorded on the memory card is reproduced. When attached to the device body, information indicating a contact state between the contact provided on the memory card and the contact provided on the device body is detected, and the memory card is attached to a predetermined location of the device body. Determination means for determining whether or not the memory card has been inserted, and notification means for performing predetermined notification when it is determined that the memory card is not inserted in a predetermined portion of the device main body. Audio recording and playback device. 2. The audio recording / reproducing apparatus according to claim 1, wherein the determination by the determination unit is performed by detecting a change in a voltage of a contact provided on the device main body. 3. The apparatus according to claim 2, further comprising a predetermined operation member, wherein when the memory card is not inserted in a predetermined portion of the device main body, a predetermined notification is performed when the predetermined operation member is operated. The audio recording / reproducing apparatus according to claim 1 or 2, wherein: