JPH09179596A - Voice recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform reproducing operation after sound recording operation with simple operation. SOLUTION: This device is provided with a recording medium 10 in which voice information is recorded with a frame unit, a digital signal processing section 5 detecting whether voiceless frames of the prescribed numbers exist continuously in information recorded in this recording medium 10 or not, a main control circuit 8 discriminating a position of the voiceless frame which is detected by the digital signal processing section 5 and is continued by the prescribed numbers as a voice pause section, a volume-up button UP and a volume-down button DOWN which can select a reproduction start position from an arbitrary voice pause section. And when it is detected that a reproducing button PL is pressed during sound recording operation or that a stop button ST is pressed succeeding to sound recording operation, successively, the reproducing button PL is pressed, the main control circuit 8 returns the present reproducing position in the recording medium 10 to the prescribed voice pause section selected by the buttons UP, DOWN, and reproduction is started from the section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice recording / reproducing apparatus, and more particularly to a voice recording / reproducing apparatus for recording or reproducing voice.

[0002]

2. Description of the Related Art An audio recording / reproducing apparatus capable of recording an audio signal input from a microphone in a recording medium and reproducing the recorded signal by a speaker or the like is known.
Various types have been proposed in the past.

Such an audio recording / reproducing apparatus uses, for example, a micro-cassette tape as a recording medium, records an audio signal on the micro-cassette tape by an analog method, and reproduces the audio signal, which is commercially available. .

In such a micro-cassette recorder, when performing operations from recording to reproduction, the recording button is first pressed, and when the necessary recording is performed, the stop button is pressed to end the recording operation, and then the rewind button. The operation of the process of rewinding to the point where recording was started by pressing and playing the recorded voice by pressing the play button was performed.

[0005]

However, in the above-described conventional manual rewinding operation, there are many operations that must be performed before the reproduction is performed, which is troublesome, and moreover, the rewinding position greatly deviates from the desired position. There were many cases where it ended up. Then, the rewound position may become a voiced part where the sound is recorded, and when the reproduction is started at this time, the sound is reproduced from the middle, which is very hard to hear, and There was a problem that it felt strange.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a voice recording / reproducing apparatus capable of performing a reproducing operation after a recording operation by a simple operation.

[0007]

In order to achieve the above object, the audio recording / reproducing apparatus according to the first aspect of the present invention performs an operation for setting a reproduction mode during a recording operation, and follows the recording operation. The stop mode is set by the operation detecting means and the operation detecting means detects at least one of the operation for setting the reproduction mode subsequent to the stop mode, and the operation detecting means detects that the operation is performed. In this case, the present reproduction position on the recording medium is returned to a past position in time by a predetermined amount, and control means for starting reproduction from the position is provided.

In the audio recording / reproducing apparatus according to the second aspect of the invention, an operation for setting a reproducing mode is performed during a recording operation, and a stop mode is set following the recording operation. Operation detecting means for detecting at least one of an operation for setting the reproduction mode, and voice pause section detecting means for detecting the presence of a silent portion of a predetermined length in the voice information recorded on the recording medium. When the operation detecting means detects that the operation is performed, the voice pause section detecting means detects a predetermined voice pause section and returns the current reproduction position on the recording medium to the detected voice pause section. And a control means for starting reproduction from the section.

Further, in the audio recording / reproducing apparatus according to the third aspect of the present invention, the audio information is processed in units of frames having a predetermined time length, and the audio information of the frame is recorded as voiced or silent. Silence frame detection means for detecting whether or not a predetermined number of silence frames exist continuously from the medium based on the above-mentioned sound / silence information, and the silence frame detection means detects a predetermined number of consecutive silence frames. When the position of the silent frame is determined to be a voice pause period, a voice pause period determination means, an operation for setting a reproduction mode during the recording operation, and a stop mode is set following the recording operation. The operation is performed by the operation detecting means for detecting at least one of the operation for setting the reproduction mode after the stop mode and the operation by the operation detecting means. Doo is that a control means for starting playback from the section returns the current playback position on the recording medium when it is detected in the predetermined audio pause interval.

The audio recording / reproducing apparatus according to the fourth aspect of the present invention is the audio recording / reproducing apparatus according to the third aspect of the invention, wherein when there are a plurality of audio pause sections determined by the audio pause section determining means, the reproduction start position is set to an arbitrary position. It has a return amount adjusting means selectable from the voice pause section.

Therefore, in the audio recording / reproducing apparatus according to the first aspect of the invention, the operation detecting means performs an operation for setting the reproducing mode during the recording operation, and the stop mode is set following the recording operation, and the stop is further performed. When at least one of an operation for setting the reproduction mode following the mode is detected, and the operation detecting means detects that the operation is performed, the control means determines the current reproduction position on the recording medium. Is returned to a past position in time by a predetermined amount, and reproduction is started from that position.

Further, in the audio recording / reproducing apparatus according to the second aspect of the invention, the operation detecting means performs an operation for setting the reproduction mode during the recording operation, and the stop mode is set following the recording operation, and the stop is further performed. At least one of the operation for setting the playback mode following the mode is detected, and the voice pause section detection means detects the presence of a silent portion of a predetermined length in the voice information recorded on the recording medium. When the operation detecting means detects that the above operation has been performed,
The control means detects a predetermined voice pause section by the voice pause section detecting means, returns the current reproduction position on the recording medium to the detected predetermined voice pause section, and starts the reproduction from the section.

Further, in the audio recording / reproducing apparatus according to the third aspect of the present invention, the silent frame detection means processes the audio information in units of frames having a predetermined time length, and the audio information of the frame indicates whether there is sound or no sound. From the recorded recording medium, it is detected whether or not a predetermined number of silent frames are continuously present based on the above-mentioned information about whether the voice is present or not, and the voice pause section determination means is used by the silent frame detection means to continue the predetermined number of consecutive times. When a silent frame is detected, the position of the silent frame is determined to be a voice pause section, and the operation detecting means performs an operation for setting the playback mode during the recording operation, and the stop mode is set after the recording operation. It is detected that at least one of the set operation and the operation for setting the reproduction mode following the stop mode is performed, and the operation detection unit performs the above operation. When issued, the control means to start playing the current playback position on the recording medium from predetermined audio pause interval to return the section.

In the audio recording / reproducing apparatus according to the fourth aspect of the invention, when there are a plurality of audio pause sections judged by the audio pause section determining means, the return amount adjusting means sets the reproduction start position from an arbitrary audio pause section. select.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show an embodiment of the present invention, and FIG. 1 is a block diagram showing a configuration of an audio recording / reproducing apparatus.

This audio recording / reproducing apparatus serves both as an audio recording apparatus and an audio reproducing apparatus, and includes a microphone 1 for converting a sound into an electric signal and an amplifier (AMP) for amplifying an analog signal obtained from the microphone 1. 2, a low pass filter (LPF) 3 for passing only a signal in a predetermined band on the low frequency side of the output of the amplifier 2, and an analog / digital converter for converting the output of the low pass filter 3 into a digital signal. An (A / D) converter 4 and a digital signal processing unit (DS) as a silent frame detecting means which is a constituent element for discriminating sound / non-voice and for compressing voice during a recording operation and expanding voice during a reproducing operation, and a data compression.
P) 5, a control circuit 6 for controlling the operation of the digital signal processing unit 5, and a data I / O buffer (data input / output buffer) for temporarily storing the voice compressed by the digital signal processing unit 5. ) 7 and this data I / O
Data is input to and output from the buffer 7, and the digital signal processing section 5 and the memory control circuit 9 described later are operated in response to the operation of a plurality of operation buttons and switches described later.
And a main control functioning as a component for voice reproduction, voice recording, and related information recording for controlling the operation of the recording medium 10 such as a CPU, a voice pause period detection means, and a voice pause period determination means. The circuit 8 and a memory control circuit 9 for controlling the recording medium 10 by giving an appropriate address signal from the main control circuit 8 and a semiconductor memory detachably attached to the audio recording / reproducing apparatus are provided. The audio data supplied from the O buffer 7 via the main control circuit 8 is recorded, or the recorded data is read out to the digital signal processing unit 5 via the main control circuit 8 and the data I / O buffer 7. The recording medium 10 to be supplied and digital / analog (D / A / D) for converting the read data expanded by the digital signal processing unit 5 into an analog signal. ) Converter 11, the digital /
Amplifier (AMP) that amplifies the output of the analog converter 11
12, a speaker 13 for outputting the electric signal output from the amplifier 12 as a sound, a display 15 as a display means for displaying various information such as the number of pause sections of the sound which is a return amount, an operation mode, and the main unit. A drive circuit 14 for driving and controlling the display 15 according to a command from the control circuit 8, a battery 20 serving as a main power source of the audio recording / reproducing apparatus, and a main power source provided between the main control circuit 8 and the battery 20. Switch 16
And an operation button 19 which is an operation detecting means connected to the main control circuit 8.

The operation buttons 19 are a recording button REC for instructing the start of recording, a reproduction button PL for instructing the start of reproduction, a stop button ST for stopping recording and reproduction, a recording position and A fast-forward button FF for fast-forwarding the playback position, a fast-rewind button REW for fast-reversing the recording position or playback position, an I-mark button I for recording instruction marks that are instruction index marks, and a plurality of documents E for recording an end mark which is an index mark indicating a space between
Mark button E and bit rate switch RATE
, A select button SEL, a volume up button UP which is a return amount adjusting means, and a volume down button DOWN which is also a return amount adjusting means.

The above-mentioned I mark button I and E mark button E
More specifically, the I mark and the E mark in are as follows.

That is, since a plurality of sentences are generally recorded on the recording medium, in this type of audio recording / reproducing apparatus, the person who recorded the sentence records it on the recording medium by operating the I mark button I during recording. It is also possible to record an instruction (I) mark, which indicates a priority relationship between a plurality of sentences, as a typist or an index mark for instruction for a secretary.
By using the mark, it is possible to specifically indicate the priority relationship by voice.

Further, in order to indicate a break between plural sentences,
By operating the E mark button E, the end (E)
Index marks called marks can be recorded.

Further, the select button SEL is a button for changing the mode of the volume control and the number of return pause sections, and each time the button is pressed, the mode is changed between the two.

The volume up button UP and the volume down button DOWN can be operated to change the volume, and are also used when changing the pause section.

The inside of the recording medium 10 has a temporary recording medium section and a main recording medium section, and the temporary recording medium section is, for example, SRAM, EEPROM, high dielectric memory, flash memory or the like. What can read and write at a relatively high speed is used as compared with the main recording medium section, while a flash memory, a magneto-optical disk, a magnetic disk, a magnetic tape, etc. are used as the main recording medium section. In this embodiment, of these, the one in which SRAM is used for the temporary recording medium portion and the flash memory is used for the main recording medium portion will be described.

The address, which is the information indicating the recording position of the audio information, may be recorded on the removable recording medium 10 or is attached to the memory control circuit 9 provided in the audio recording / reproducing apparatus. It may be recorded in an internal storage unit such as a semiconductor memory (not shown).

Information recorded on the recording medium 10 will be described with reference to FIG. FIG. 2 is a diagram showing the structure of information recorded on the recording medium.

The information recorded on the recording medium 10 indicates a voice data section 10B capable of recording a plurality of voice data of one group, a recording position of each voice data recorded in the voice data section 10B, and the like. It is roughly classified into an index section 10A in which information is recorded.

In the illustrated example, the voice data section 1
0B includes the first voice message file 10B1 and
A second voice message file 10B2 and a third voice message file 10B3 are recorded.

Further, the operation start position information 10A1 and the operation end position information 10A2 of the first voice message file 10B1 are recorded in the index portion 10A, and similarly, the second and third voice message files 10B2 are recorded. , 10B3 of the operation start position information and the operation end position information of the operation position information 10B3 are also recorded. Further, information on the current operation position (for example, information on the position shown as the operation point in FIG. 2) is operation position information 10A3.
It is recorded in.

Next, FIG. 3 is a diagram showing a detailed bit allocation of the first voice message file 10B1.

Each voice data is recorded in units of frames, and each frame has 1 bit in the voice / silence flag and a low bit rate (4.9 k).
bps) or normal rate (7.5 kbps), 1 bit is allocated to indicate switching, and 1 when the voice coded data is at a low rate.
It is recorded with 16 bits and 178 bits at the normal rate.

FIG. 4 is a perspective view showing an example of the external appearance of the audio recording / reproducing apparatus.

This audio recording / reproducing apparatus, as shown in the figure,
An LCD display is provided as the display unit 15, and "PLAY" indicating that the reproduction is being performed is displayed on the LCD display, and the reproduction time is, for example, 3 at present.
It is displayed that the time is 19 minutes.

Furthermore, when the remaining recording amount of the recording medium 10 is "R
It is indicated that it is 27 minutes, with the indication "Email".

In the upper left part of the LCD display, the number of pause sections of the auto back space is "return amount".
, Which is 8 in the illustrated setting.

The select button SEL, the volume down button DOWN, and the volume up button UP are arranged in this order from the left below the display 15 having an LCD display. As you can see, the letters “SEL” and “D
"OWN" and "UP" are printed.

On the other hand, on the side surface of this audio recording / reproducing apparatus,
Record button REC, play button PL, stop button S
T, fast rewind button REW, and fast forward button FF are arranged in order, and the letters "REC", "PLAY", and "STO" are displayed so that the functions of these buttons can be understood.
"P", "REW", and "FF" are printed.

Next, the operation of this audio recording / reproducing apparatus will be described with reference to FIG.
This will be described with reference to FIG.

When the battery 20 is set and power is supplied to the main control circuit 8, the main control circuit 8 detects it by voltage detection, and this operation is started.

When the operation is started, first, the main control circuit 8
Performs various initial settings such as external conditions and internal storage (step S1). However, at this point, the main power switch 16 for instructing the power supply to the entire audio recording / reproducing apparatus is in the off state.

After completing the initial setting, the main control circuit 8 detects whether or not the main power supply switch 16 is in the ON state (step S2). If not, the main power supply switch 16 is turned on. Wait until

On the other hand, when it is detected that the main power switch 16 is on, a switch (not shown) provided between the battery 20 and each circuit for supplying electric power to the entire audio recording / reproducing apparatus. Is turned on to read the information of the index portion 10A from the recording medium 10, that is, the operation start position information 10A1 and the operation end position information 10A2, and also read the code mode, the operation condition, and the like (step S3).

At this time, it is judged from the data read from the recording medium 10 whether or not the recording medium 10 has already properly recorded the index, that is, whether or not the format of the recording medium 10 is normal. Yes (step S4).

If an unformatted recording medium 10 is used, it is determined that the recording medium 10 is not normal, and the drive circuit 14 is controlled to determine whether or not the display 15 should perform memory formatting. A confirmation display is performed, and an instruction input from the user is waited for (step S5).

Here, the memory format (initialization) is a process of inputting information indicating the usage condition into the index portion 10A of the recording medium 10 and inputting "0" into the audio data portion 10B. .

When the button for confirming that the memory format is not performed (here, the stop button ST is also used) is pressed, the drive circuit 14 is controlled to record by the display unit 15. It is provided between the battery 20 and each circuit for indicating that the medium 10 is not normal and indicating that the recording medium 10 should be replaced and for supplying power to the entire recording / reproducing apparatus. Switch (not shown) is turned off (step S
8).

After that, the main power switch 16 is turned off in order to replace the recording medium 10 (step S
9) If it is detected that the switch has been turned off, the process returns to step S2.

On the other hand, in step S5, when the button for confirming that the memory format is to be performed (here, the recording button REC is also used) is pressed,
The recording medium 10 is formatted (step S6).

When this format is completed, or when the format of the recording medium 10 is normal in step S4, the drive circuit 14 is controlled to display the display unit 1.
A message indicating that the initial setting is completed is displayed by step 5 (step S7).

Thereafter, the current operating position is detected based on the operating position information 10A3 read from the index section 10A, and the drive circuit 14 is controlled to display the detected position on the display 15 (step S10).

Then, it is detected whether or not any one of the operation buttons 19 of this audio recording / reproducing apparatus has been pressed, and if not pressed, each circuit is put in a standby state until it is pressed (step S11). .

When it is detected that one of the operation buttons 19 has been pressed, it is first detected whether or not the operated button is the record button REC (step S12), and the record button REC has been pressed. In this case, the digital signal processing unit 5 is controlled to compress the audio information input from the A / D converter 4, and the memory control circuit 9 is controlled to record the audio data in the audio data unit 10B of the recording medium 10. The process starts (step S13).

If it is determined in step S12 that the record button REC was not operated, then
It is detected whether or not the play button PL has been operated (step S14). When the play button PL is pressed here, the memory control circuit 9 is controlled to read the recorded data from the audio data section 10B of the recording medium 10,
The digital signal is sent to the digital signal processing unit 5 for decompression and D /
The reproduction process for sending audio information to the A converter 11 is started (step S15).

If it is determined in step S14 that the play button PL is not operated, it is detected whether or not the fast-forward button FF is operated (step S16). If the fast-forward button FF is pressed here, the operating position is set to an appropriate speed (for example, 20 during playback).
A fast-forward process of sequentially fast-forwarding at double speed is started (step S17).

When it is determined in step S16 that the fast forward button FF is not operated, it is detected whether or not the fast return button REW is operated (step S18). If the fast-reverse button REW is pressed here, the fast-reverse processing is performed in which the operation position is sequentially moved at the same speed in the opposite direction to the case of the fast-forward (step S).
19).

Incidentally, the above steps S13, S15, S1
Stop button ST during the process of 7 and S19
When is pressed, the process exits from these processes and returns to step S11.

If it is determined in step S18 that the rewind button REW was not operated, it is determined whether the main power switch 16 has been turned off, or the state of other various setting buttons. Is detected (step S20).

When it is determined that the main power switch 16 is not turned off, the state of the setting button is detected, the state is stored in the storage section (not shown) inside the main control circuit 8, and the process returns to step S11.

The setting button is not a button actually provided in this audio recording / reproducing apparatus, but the recording button REC, the reproduction button PL, the stop button ST, the fast-forward button FF, the return button REW, and the I-mark button I. , E
This button is substituted by pressing some of the mark buttons E at the same time.

In step S20, when the main power switch 16 is turned off, the memory control circuit 9 is controlled and the index section 10 of the recording medium 10 is controlled.
The information in A is erased, and the index information stored in a storage unit (not shown) inside the main control circuit 8 is stored in the recording medium 10.
It is stored in the index unit 10A (step S2
1).

When this index transfer processing is completed,
The main control circuit 8 turns off a power switch (not shown) for supplying power to the entire audio recording / reproducing apparatus (step S22), and returns to step S2.

Next, the recording process of step S13 will be described in detail with reference to the flowchart of FIG.

The operation of the recording process for detecting the pressing of the record button REC in step S13 of FIG. 5 is started. First, the recording mode is detected, that is, the bit rate changeover switch RATE is set to the normal rate and the low rate. Which side is selected is detected (step S31).

Then, the rate selection information, which is the recording mode information of the voice, and other recording sensitivity information are transferred as commands to the digital signal processing section 5 (step 32).

Next, the recording start position in the audio data portion 10B of the recording medium 10 is obtained based on the index information (operating position information) stored in the storage unit (not shown) inside the main control circuit 8, and the start position is obtained. Is written in the index portion 10A as the operation start position information 10A1 (step 33).

Here, the digital signal processing section 5 determines whether the voice data (frame) of a certain predetermined time length is voiced or silent, and at the same time, performs coding (step 34).

Then, the address of the recording medium 10 in which the transferred encoded data is to be written is calculated from the operating position information stored in a storage section (not shown) inside the main control circuit 8 and output to the memory control circuit 9. Yes (step S3
5).

At the same time, the encoded data transferred from the digital signal processing section 5 is sent to the recording medium 10 and recorded in the audio data section 10B under the control of the memory control circuit 9.

Next, the operation position information stored in the storage section inside the main control circuit 8 is erased, and the operation end position information 10A2 and the operation position information 10A3 of the index section 10A are newly stored therein. , Update (step 36).

Then, it is detected whether or not the play button PL is pressed (step S37), and if it is pressed, the return processing is performed to thereby determine the number of return pause sections as shown in FIG. The operating position information 10A3 is updated only (8 in the illustrated example) (step S38).

Then, in order to shift to the reproduction mode, the main control circuit 8 automatically recognizes that the reproduction button has been pressed (step S39), and exits from this recording process.

On the other hand, if the play button PL is not pressed in step S37, it is checked whether or not the stop button ST is pressed (step S4).
0), if not pressed, the process returns to step S34.

When the stop button ST is pressed, the register Rec of the temporary storage memory of the main control circuit 8 is pressed.
Stop is set to "1" (step S41), and this recording process is exited.

Register RecSt of the temporary storage memory
For op, the initial value is set to “0” and cleared to “1”.
When is set, it is possible to recognize whether or not the recording stop operation is performed.

When the fast-forward process in step S17 or the fast-reverse process in step S19 of FIG. 5 is entered, the register RecStop is cleared so that the recording process is stopped and the playback process is started. The register RecStop is set only in the.

Here, at the time of the recording process, the CELP (Code Excited LPC) coding system, that is, the analysis-synthesis coding system is used in the digital signal processing unit 5 to code the voice data. ing.

The CELP method is a method of extremely efficiently vector-quantizing the sound source signal of the LPC synthesis filter analyzed in units of the above-mentioned frames by using codebooks having various waveform patterns.

The data to be coded is, for each frame, RATE selection information, voiced / unvoiced information, and Lth order L.
They are index information of PC coefficients and index information for creating a drive signal source used for synthesis by the LPC synthesis filter.

The difference between the waveform predicted by this method and the voice signal in the predetermined section is used as a residual signal, and the residual signal and the voice signal in the predetermined section are subjected to cross-correlation. When divided by the autocorrelation of the signal, it is assumed that the sound is present when the value is 0.81 or less and the sound is absent when the value exceeds 0.81.

As shown in FIG. 3, the bit allocation of the data to be written in the audio data area during the recording process is 178 bits at the normal bit rate of 7.5 kbit / sec, which is a low bit rate. Yes 4.
At 9 kbit / sec, it becomes 116 bits,
It is written every frame.

FIG. 7 is a flow chart showing the operation of the coding and the presence / non-presence of speech in the digital signal processing section.

First, the voice data is input from the A / D converter 4, and the input of 24 ms is applied to the sampling frequency of 8 kHz.
Frame input processing is performed in which the data sampled in step 1 is input as one frame (step S51).

Next, pre-processing such as pre-emphasis and Hamming windowing is applied to the sampled data (step S52).

Then, the speech coding processing by the CELP coding method as described above is performed (step S53). By this voice encoding processing, the autocorrelation energy of the voice of the current frame and the cross-correlation with the residual waveform are obtained.

At this time, the sound / silence energy calculation is performed by the method described above (step S5).
4).

Then, it is judged from the above-mentioned conditional expression of voice / silence (step S55), and if voice is present, the voice / silence flag is set to "1" (step S56). The voice / silent flag is reset to "0" (step S57), and the process is exited.

Next, referring to the flow chart of FIG.
The operation of the returning process in step S38 of FIG. 6 will be described in detail.

In the recording process of FIG. 6 described above, step S
If it is detected at 37 that the play button PL is pressed, the recording process is stopped and the process returns to the returning process.

The operation position based on the operation position information currently stored in the internal storage unit is at a place where the next voice encoded data is recorded from the address where the voice encoded data is finally recorded. This internal operation position information is updated to the position returned by one frame, output to the memory control circuit 9, the data is read from the recording medium 10, and the bit of the sound / silence flag of the first bit is checked (step S62). ).

If there is sound, the internal counter n, which counts the number of silences and has an initial value of 0, is cleared (step S64), and the process returns to step S61. If the flag is set to "0", it is determined that there is no sound, and the internal counter n
Is incremented (step S63).

Then, it is judged whether or not the value of the internal counter n is larger than 2 (step S65), and when it is larger than 2, that is, the silence is continuously generated for the number of frames larger than 2 frames (24 ms × 2). If it continues, the process returns to step S61.

When the value of the internal counter n is 2 or less, it is checked whether the internal counter n is equal to 2 (step S66).

If not 2, the above step S61
Returning to 2, if the number is 2, the internal counter c that counts the number of pause intervals and has an initial value of 0 is incremented (step S67).

Here, the number of pause intervals for return, which is a value to be compared with the internal counter c for counting the number of pause intervals, as shown in FIG. 4, is obtained by pressing the left and right volume down buttons DOWN and UP. It can be set by doing so.

That is, the volume down button DOW
Each time N is pressed once, the number of return rest sections is decremented, and accordingly, the value of the LCD display number of the display unit 15 also displays the decremented value.

Also, each time the volume up button UP is pressed, the number of return pause sections is incremented, and accordingly, the value of the LCD display number of the display unit 15 is also displayed as the incremented value. ing.

Then, the number currently displayed on the LCD display of the display unit 15 represents the number of return pause sections of the auto back space.

Therefore, the value of the internal counter c is compared with whether or not the number of return suspension intervals is equal (step S6).
8) If they are not equal, the process returns to step S61, and if they are equal, the current playback position is returned to the position returned by the set number of pause sections, and the value of the current internal operation position information is updated to the operation position information 10A3 ( In step S69), the process exits.

Next, referring to the flowchart of FIG.
The operation of the reproduction process in step S15 of FIG. 5 will be described in detail.

In FIG. 5, when it is detected in step S14 that the play button PL is pressed, step S14 is executed.
The processing shifts to this reproduction processing shown in 15.

First, it is checked whether "1" is set in the register RecStop of the temporary storage memory of the main control circuit 8 (step S71). If it is set, the stop button is pressed during the recording process. Recognizing that the push operation has been performed, the process moves to the return process shown in FIG. 8, and the operation position information 10A3 is updated to the position returned by the number of the return pause sections shown in FIG. 4 (step S7).
2).

Then, the register Rec of the temporary storage memory
Stop is cleared (step S73) to indicate that the return processing operation is completed.

When step S73 is completed, or when the register RecStop of the temporary storage memory is cleared in step S71, fast forward (FF), fast reverse (REW), and after the power is turned on, the play button PL is turned on. When it is determined that the button has been pressed, the main control circuit 8 first transfers volume volume value information and the like as a command from the main control circuit 8 to the digital signal processing section 5 (step S74).

Then, the audio data section 10 of the recording medium 10
The read position of B is input from the operation position information of the index information unit 10A, the drive circuit 14 is controlled, and the position is displayed on the display unit 15.

Then, the audio data section 10 of the recording medium 10
In order to read the voice message file from B, the address calculated from the operation start position information stored in the internal storage unit is output to the memory control circuit 9 (step S75).

As a result, one frame of encoded data is read from the audio data section 10B of the recording medium 10 into the main control circuit 8 (step S76).

The read encoded data for one frame is transferred to the digital signal processing section 5 (step S
77) After synthesizing for one frame, output to the D / A converter 11 and output sound from the speaker 13.

Then, the main control circuit 8 updates the reproduction position (operation position) information stored in the internal storage unit, and further updates the operation position information 10A3 of the index unit 10A (step S78).

Thereafter, it is detected whether or not the stop button ST is pressed (step S79), and if it is not pressed, the process returns to step S75 to continue the reproduction processing, while if it is pressed, The reproduction position is changed by the return processing, and the reproduction processing ends.

In the above description, the playback position is set to a position where there is no sound, and the playback position is set to a position where no sound is recorded. You may make it include a sound part as a position.

According to such an embodiment, when the play button is pressed during the recording operation, or the play button is pressed after the stop button is pressed, a predetermined value is automatically set. Since the playback operation is performed after returning to the rest period, the operation becomes simple.

Moreover, since the position where the reproduction is started is from the silent position, the voice is easily heard and the user does not feel any discomfort.

Then, the number of rest periods to be returned can be easily adjusted while observing the display on the display.

[Additional Notes] According to the above-described embodiment of the present invention as described in detail above, the following configuration can be obtained.

(1) From the recording medium in which the audio information is processed in units of frames having a predetermined time length, and the information indicating whether the audio information of the frame is voiced or not, is recorded. Silence frame detection means for detecting whether or not a predetermined number of silence frames continuously exist based on information, and when the silence frame detection means detects a predetermined number of consecutive silence frames, the position of the silence frame is determined. A voice pause section determination means for determining a voice pause section, an operation for setting a playback mode during a recording operation, and a stop mode set after the recording operation and a playback mode following the stop mode. When the operation for detecting the operation has been performed, and the operation detecting means detects the operation, the recording medium is And a control means for returning the current reproduction position to a predetermined audio pause section and starting reproduction from the section.

(2) The voice according to (1), which has a return amount adjusting means capable of selecting a reproduction start position from an arbitrary voice pause section when there are a plurality of voice pause sections judged by the voice pause section judging means. Recording / playback device.

(3) The audio recording / reproducing apparatus according to (2), further comprising display means for displaying the audio pause section selected by the return amount adjusting means.

(4) The voice / non-voice information is a voice / non-voice flag provided by allocating 1 bit in each frame, and the voice recording according to item (1) to (3). Playback device.

According to the invention described in the above (1), the reproducing operation after the recording operation can be performed by a simple operation, and the position at which the reproduction is started is silent, so that the voice can be easily heard. , I don't feel uncomfortable. Since the audio information is in frame units, the processing is easy.

According to the invention described in (2) above, the same effect as that of the invention described in (1) above can be obtained, and a desired voice pause section can be selected. Can be widely addressed.

According to the invention described in (3) above, the same effect as the invention described in (2) above can be obtained, and the selected voice pause section can be confirmed.
The operation becomes more reliable.

According to the invention described in (4) above, the same effect as that of the invention described in paragraphs (1) to (3) above can be obtained, and a voiced / silent flag is provided in each frame. It is possible to easily determine whether there is sound or no sound without checking all the data in the frame, and since the data amount of 1 bit is sufficient, the increase in the data amount can be suppressed to the minimum. it can.

[0122]

As described above, according to the audio recording / reproducing apparatus of the present invention according to claim 1, the reproducing operation after the recording operation can be performed by a simple operation.

Further, according to the audio recording / reproducing apparatus of the present invention according to claim 2, since the reproducing operation after the recording operation can be performed by a simple operation, and further, the position where the reproduction is started is silent. , The voice is easy to hear, and there is no feeling of discomfort.

Further, according to the audio recording / reproducing apparatus of the present invention according to claim 3, since the reproducing operation after the recording operation can be performed by a simple operation, and further, the position where the reproduction is started is silent. , The voice is easy to hear, and there is no feeling of discomfort. Since the audio information is in frame units, the processing is easy.

According to the audio recording / reproducing apparatus of the present invention according to claim 4, the same effect as that of the invention according to claim 3 can be obtained, and a desired audio pause section can be selected. It can be used for a wide range of purposes.

[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 a diagram showing a configuration of information recorded on a recording medium in the embodiment.

3 is a diagram showing a detailed bit allocation of the voice message file shown in FIG.

FIG. 4 is a perspective view showing an example of an external appearance of the audio recording / reproducing device of the embodiment.

FIG. 5 is a flowchart showing the operation of the main control circuit of the above embodiment.

FIG. 6 is a flowchart showing details of the recording process in FIG.

FIG. 7 is a flowchart showing an operation of encoding and sound / non-voice determination by the digital signal processing unit of the above embodiment.

FIG. 8 is a flowchart showing details of return processing in FIG.

9 is a flowchart showing details of the reproduction process in FIG.

[Explanation of symbols]

5 ... Digital signal processing section (silent frame detection means) 8 ... Main control circuit (control means, voice pause section detection means, voice pause section determination means) 10 ... Recording medium 15 ... Indicator (display means) 19 ... Operation button ( Operation detecting means) UP ... Volume up button (return amount adjusting means) DOWN ... Volume down button (return amount adjusting means)

Claims (4)

[Claims] 1. An operation for setting a reproduction mode during a recording operation, an operation for setting a stop mode following the recording operation, and an operation for setting a reproduction mode subsequent to the stop mode. And the operation detecting means for detecting at least one of the above, and when the operation detecting means detects that the above operation has been performed, the current reproduction position on the recording medium is returned to a past position in time by a predetermined amount. An audio recording / reproducing apparatus comprising: a control unit for starting reproduction from the position. 2. An operation for setting a reproduction mode during a recording operation, an operation for setting a stop mode subsequent to the recording operation, and an operation for setting a reproduction mode subsequent to the stop mode. The operation detecting means for detecting at least one of the above, the voice pause section detecting means for detecting the presence of a silent portion of a predetermined length in the voice information recorded on the recording medium, and the operation detecting means When it is detected, the voice pause section detection means detects a predetermined voice pause section, returns the current reproduction position on the recording medium to the detected predetermined voice pause section, and starts reproduction from the section. An audio recording / reproducing apparatus comprising: 3. The voiced or silent information from a recording medium on which voice information is processed in units of frames having a predetermined time length and in which voiced information of the frame is recorded. A silent frame detecting means for detecting whether or not a predetermined number of continuous silent frames exist, and when the silent frame detecting means detects a predetermined number of continuous silent frames, the position of the silent frame is voiced. A voice pause section determining means for determining a pause section, an operation for setting a playback mode during a recording operation, a stop mode set after the recording operation, and a playback mode set after the stop mode. When it is detected by the operation detecting means that at least one of the operation for setting and that the operation is performed by the operation detecting means is recorded on the recording medium. An audio recording / reproducing apparatus comprising: a control unit that returns the current reproduction position to a predetermined audio pause section and starts reproduction from the section. 4. The voice recording according to claim 3, further comprising a return amount adjusting means capable of selecting a reproduction start position from an arbitrary voice pause section when there are a plurality of voice pause sections judged by the voice pause section judging means. Playback device.