JPH09146590A - Device and method for sound recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a sound signal possible to be recorded from the time which is back in time a specified period before a recording operation was started by storing sound data continuously and cyclically and transferring going back a specified amount of data from the sound data having been written at present according to a given command. SOLUTION: A DSP 31 informs the CPU 28 that frame writing is started and at the same time it writes the sound data and the frame number composed of 32 bytes to a SRAM 32 in the unit of frame. It repeats this action cyclically until receiving a conversion suspending command from the CUP 28. When the past recording key is already clicked and the past recording is on standby, the CPU 28 designates the address by the addresses corresponding to the frames of 10 seconds back from the head address of the latest frame written into the SRAM 32 by the DSP 31 as the recording start address. On the other hand, if it is not on standby, the CPU 28 designates the head address of the latest frame as the recording start address.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice recording apparatus and a voice recording method, and more particularly, to a voice recording apparatus and a voice recording method for converting a series of input voice signals into voice data having a digital value and storing the voice data. .

[0002]

2. Description of the Related Art First, for convenience of explanation, the following terms are defined.

(1) A phrase is a recording unit of a series of audio data recorded from the start of recording to the end of recording.

(2) A block is a data storage unit having a predetermined data storage capacity, and these blocks collectively form a data storage area of the data storage means.

(3) A frame is a minimum recording unit of voice data, and a plurality of frames are assembled to form a phrase.

In this type of conventional voice recording apparatus, a microphone is used to convert the voice of a conversation in a conference into a voice signal which is an electric signal, and further the voice signal is converted into an A signal.
It is known that after D / D conversion and encoding, the data is compressed and stored as voice data in a RAM, which is a semiconductor memory, and the voice data is reproduced again as voice.

FIG. 1 is an external view of a conventional voice recording device.

The conventional voice recording apparatus 1 includes a microphone, various keys, which are necessary for recording and reproducing a voice signal.
Although equipped with switches and display LEDs, only those necessary for explaining the prior art will be described.

2 is a power switch, 3 is a built-in microphone,
Reference numeral 4 is an audio volume, and 5 is an earphone jack.

Reference numeral 6 denotes a recording key. Recording is started by pressing this key once during standby and quickly releasing it (hereinafter referred to as "click"), and voice after the point of clicking is recorded. Further, during recording, a display LED 37 provided above the recording key 6 is lit to indicate that recording is in progress. If the recording key 6 is clicked again during recording, the recording will stop.

Reference numeral 7 is a playback key. By clicking this key during standby, the recorded voice data is played back as a voice signal and played back through an earphone (not shown) connected to the earphone jack 5. Can be heard. Also, during reproduction, the display LED 37 blinks to indicate that reproduction is in progress.

Reference numeral 8 denotes a fast-forward key. When this key is clicked during standby, the designation moves from the currently designated phrase to the next newly recorded phrase in terms of time, and further the playback key 7 is clicked. If so, the phrase is played back. When the fast-forward key 8 is clicked during playback, the phrase currently being played is moved to the beginning of the next newly recorded phrase in time and played, and when the fast-forward key 8 is continuously pressed during playback, With the fast-forward speed kept constant, the phrase currently being played is fast-forwarded in proportion to the time it is held down.

Reference numeral 9 is a reverse return key. When this key is clicked during waiting, the designation moves to the next phrase recorded earlier in time than the currently designated phrase,
Further, when the reproduction key 7 is clicked, the phrase is reproduced. Also, reverse key 9
If you click during playback, you will return to the beginning of the phrase that is currently playing and play the same phrase again. Also, if you press and release this key twice quickly (hereinafter referred to as "double-click"), the current playback will start. The phrase that was recorded earlier than the phrase is moved to the beginning of the previous phrase and played back. If you continue to press the reverse key 9 during playback, press it while keeping the reverse speed constant. The phrase currently being played is reversed in proportion to the continued time.

[0014]

However, since the conventional voice recording apparatus 1 has only the function of recording the voice after the time when the recording key 6 is clicked, as described above, for example, a conference or a lecture meeting. For example, even though the operator is trying to record from the beginning of them, they suddenly start unexpectedly, resulting in the operator delaying clicking on the record key 6 and There was a problem that the beginning could not be recorded often.

The present invention has been made in order to solve the above-mentioned problems, and a voice recording apparatus capable of recording from a voice signal at a time point when a predetermined time has elapsed after a recording operation by an operator. And to provide a recording method.

[0016]

In order to achieve the above object, a voice recording apparatus of the present invention according to claim 1 converts a series of input voice signals into voice data of digital values and stores them. In the voice recording device, the series of voice signals are converted into the voice data by first input means for inputting a conversion instruction for converting the series of voice signals into the voice data, and the conversion instruction input by the first input means. A conversion means for converting the input data, a first storage means for circulating and continuously storing the voice data converted by the conversion means, and a transfer command for transferring the voice data stored by the first storage means According to a second input means for performing the transfer command input by the second input means, and a predetermined amount of data from the currently written audio data,
It is characterized by comprising a transfer means for transferring the voice data stored in the first storage means, and a second storage means for storing the voice data transferred by the transfer means.

A voice recording apparatus of the present invention according to claim 2 is
The voice recording device according to claim 1, further comprising display means for displaying that the conversion means has started conversion of the series of audio signals into the audio data.

A voice recording apparatus of the present invention according to claim 3 is
The voice recording apparatus according to claim 2, wherein the display unit includes a lighting display unit, and the lighting display unit displays that the conversion is started by lighting.

A voice recording apparatus of the present invention according to claim 4 is,
3. The voice recording device according to claim 2, wherein the display unit includes a blinking display unit, and the blinking display unit displays the start of conversion by blinking.

A voice recording method of the present invention according to claim 5 is,
In a voice recording method of a voice recording device for converting a series of input voice signals into voice data of a digital value and storing it, a first step of inputting a conversion command for converting the series of voice signals into the voice data, A second step of converting the series of audio signals into the audio data according to the conversion command input in the first step; and a step of circulatingly storing the audio data converted in the second step. 3 steps, a fourth step of inputting a transfer command for transferring the voice data stored in the third step, and a predetermined amount from the currently written voice data according to the transfer command input in the fourth step In the fifth step, the voice data stored in the third step is transferred, and the voice data transferred in the fifth step is stored. Characterized in that it comprises a sixth step.

The voice recording method of the present invention according to claim 6 is,
The voice recording method according to claim 5, further comprising a seventh step of displaying that conversion of the series of voice signals into the voice data is started in the second step.

A voice recording method of the present invention according to claim 7 is,
7. The voice recording method for a voice recording apparatus according to claim 6, further comprising a lighting display means, wherein the seventh step includes an eighth step of displaying that the conversion is started by lighting the lighting display means. It is characterized by

The voice recording method of the present invention according to claim 8 is:
7. The voice recording method for a voice recording device according to claim 6, further comprising a blinking display means, wherein the seventh step includes a ninth step of displaying that the conversion is started by turning on the blinking display means. It is characterized by

A voice recording apparatus of the present invention according to claim 9 is:
In a voice recording device for converting a series of inputted voice signals into voice data of a digital value and storing the same, the third storage means for circulating and continuously storing the voice data, and the third storage means It comprises a transfer means for transferring the voice data, and a fourth storage means for storing the voice data transferred by the transfer means, wherein the transfer means comprises the third means.
It is characterized in that the voice data is transferred after a predetermined amount of data from the voice data currently written in the storage means.

According to a tenth aspect of the present invention, there is provided a voice recording method of a voice recording apparatus for converting a series of input voice signals into voice data of a digital value and storing the voice data. First to memorize continuously
0 step, an eleventh step of transferring the voice data stored in the tenth step, and a twelfth step of storing the voice data transferred in the eleventh step, the eleventh step including It is characterized in that the voice data is transferred by a predetermined amount of data from the voice data currently stored in 10 steps.

An information storage medium of the present invention according to claim 11 records the voice recording method according to any one of claims 4 to 8.

[0027]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 is an external view of a voice recording device according to the present invention.

The voice recording device 10 is equipped with a microphone, various keys and switches necessary for recording and reproducing a voice signal.

Reference numeral 11 denotes a power switch, which can be turned on / off by moving the power from the two batteries 13 housed in the battery box 12 by moving it in the direction of the arrow in the figure. When the power switch 11 is in the “ON” position, power is supplied from the battery 13 to an electric circuit (not shown) included in the voice recording device 10, and the electric circuit performs a predetermined circuit operation.

Reference numeral 14 is a built-in microphone, which converts a voice such as a conversation in a conference into a voice signal which is an electric signal and inputs the voice signal into a voice reproduction LSI described later.

Reference numeral 15 is a playback key. By clicking this key, the recorded voice data is played back as a voice signal, and the playback sound is heard through an earphone (not shown) connected to the earphone jack 16. When the power switch 11 is set to the "ON" position and the play key 15 is clicked, the most recently recorded phrase is played.

During reproduction, the display LED 25 is displayed according to the remaining time in order to indicate to the operator that reproduction is in progress.
Or any one of the display LEDs 27 blinks. For example, the voice recording device 10 according to the present invention is configured such that the LED 25 blinks when the remaining time is 5 minutes or more, the LED 26 blinks when the remaining time is 1 minute or more and less than 5 minutes, and the LED 27 blinks when the remaining time is less than 1 minute. Further, when the remaining time is less than 30 seconds, the blinking speed of the LED 27 becomes faster than usual, and the operator is informed that the remaining reproduction amount is low.
However, these times are merely examples and are not limited to these.

Then, during playback, the playback key 1 is again pressed.
When 5 is clicked, the reproduction is stopped and the blinking display LED is turned off.

Reference numeral 17 is a voice volume for adjusting the volume of the reproduced sound. Audio volume 17 in the direction of the arrow
By rotating, the playback volume increases,
It gets smaller.

Reference numeral 18 denotes a fast-forward key. When this key is clicked during standby, the designation moves from the currently designated phrase to the next newly recorded phrase in time, and the play key 7 is clicked. If so, the phrase is played. If the currently specified phrase is the most recently recorded phrase (hereinafter referred to as "latest phrase"), clicking this key causes the oldest recorded phrase (hereinafter referred to as "oldest phrase"). The designation is moved to.

When the fast-forward key 18 is clicked during reproduction, the phrase being currently reproduced is moved to the beginning of the phrase newly recorded next, and the phrase is reproduced. If the phrase currently being reproduced is the latest phrase, the phrase is reproduced. , It moves to the beginning of the oldest phrase and plays it. Further, if the fast-forward key 18 is continuously pressed, the phrase currently being reproduced is fast-forwarded and reproduced according to the length of time the key is kept pressed. It is also possible to limit the maximum value of the feed rate. Also, during this fast-forwarding, either the display LED 25 to the display LED 27 blinks according to the remaining time of the phrase, and the blinking speed becomes faster according to the fast-forwarding speed. For example, when the remaining time is 5 minutes or more, the LED
The LED 26 blinks when 25 is 1 minute or more and less than 5 minutes, and the LED 27 blinks when 25 minutes is less than 1 minute.

Reference numeral 19 is a reverse key, and when this key is clicked during standby, the designation moves to the previous phrase recorded earlier in time than the currently designated phrase, and further the playback key 7 is pressed. If clicked, the phrase is played. When the currently specified phrase is the oldest phrase and the key is clicked, the specification moves to the latest phrase.

If this reverse return key 19 is clicked during playback, the phrase currently being played back is returned to the beginning and the same phrase is played back again. If this key is double clicked while playing back, the phrase currently being played is selected. Also, the phrase is moved to the beginning of the previous phrase and is played back. However, if the phrase currently being played is the oldest phrase, the phrase is moved to the beginning of the latest phrase and played. Further, if the reverse key 19 is kept pressed, the phrase currently being reproduced is returned in reverse according to the length of time the key is pressed, and the longer the time the key is pressed, the higher the feed speed. However, it is possible to limit the maximum value of the feed rate.
Further, during the reverse return, the display LED 25 to the display LED 27 blink according to the remaining time of the phrase, and the blinking speed increases according to the reverse return speed. For example, when the remaining time is 5 minutes or more, the LED 25 is 1 minute or more and less than 5 minutes, and the LED 26 is L when the remaining time is less than 1 minute.
The ED 27 is configured to blink.

Reference numeral 20 denotes an erasing switch, which is designated in the waiting state when the erasing switch 20 is moved in the direction of the arrow in the figure during the standby or during phrase reproduction and the state is held for a predetermined time of 3 seconds or more. The phrase being played or the phrase being played is erased. Also, while recording a phrase,
When the erase switch 20 is moved in the direction of the arrow in the figure and kept in that state for a predetermined time of 3 seconds or more, the oldest phrase that can be estimated to be the most unnecessary is erased. The remaining memory increases by the amount occupied by the phrase, and even before the remaining recording remains during recording,
If you erase this, you can continue recording. However, in the voice recording apparatus 10 according to the present invention, the predetermined time for erasing is set to 3 seconds or more, but it is sufficient if the operator does not erase a necessary phrase by an erroneous operation, and is limited to 3 seconds. is not.

Reference numeral 21 is a recording key. By pressing this key only once, recording is started and the built-in microphone 14
The audio signal input by is converted into audio data and written in a flash memory (not shown) described in detail below. Further, during recording, the display LED 25, the display LED 26, or the display LED 27 blinks depending on the remaining recording time in order to display to the operator that the recording is in progress and the remaining recording time. For example, the LED 25 blinks when the remaining time is 5 minutes or more, the LED 26 blinks when the remaining time is 1 minute or more and less than 5 minutes, and the LED 27 blinks when the remaining time is less than 1 minute. If less than, the blinking speed of the LED 27 will be faster than usual,
It is designed to alert the operator. However, these times are merely examples and are not limited to these.

Then, during recording, another recording key 2
When 1 is pressed, recording is stopped and the blinking display LED is turned off.

Reference numeral 22 is a past record key. By pressing this key only once, the past record is put into a standby state and the display LED 24 is turned on. In the past recording standby state, the audio signal input by the built-in microphone 14 is encoded and data-compressed by the audio reproduction LSI described later to be converted into audio data, and is circulated continuously in the SRAM functioning as a buffer memory. Remembered. When the record key 21 is pressed in the past recording standby state, a CPU (not shown) described later dwells on audio data for up to 10 seconds from the time when the record key 21 is pressed,
By reading the voice data stored in the SRAM and writing it in the flash memory, the past voice data can be recorded.

When the past record key 22 is pressed again in the past record standby state, the standby state is canceled and the display LE is displayed.
D24 is turned off.

Reference numeral 23 denotes a recording time changeover switch. By moving this switch in the direction of the arrow in the figure, the recording time can be changed over to 45 minutes or 90 minutes. When the recording time switch 15 is in the position of "90 minutes", one frame has 32 bytes, and when it is in the position of "45 minutes", one frame has 64 bytes. Hereinafter, for simplification of description, one frame is 32 bytes.

FIG. 3 is a block diagram showing the basic configuration of the voice recording apparatus according to the present invention.

In FIG. 3, reference numeral 28 denotes a CPU, which, in addition to a microprocessor, has a ROM 28a for storing a control program and a RAM 28b for temporarily storing data and the like, having a plurality of flag areas necessary for control. It controls various input / output devices, manages memory, and processes data. Further, the CPU 28 has
The following various devices and elements are connected via a bus 29 and an I / O interface 30.

Reference numeral 31 is a voice reproduction LSI (hereinafter referred to as "DSP").
It is). Upon recording, the DSP 31 A / D-converts and encodes the audio signal converted by the built-in microphone 14, then compresses the data to create audio data, and stores the audio data in the SRAM 32 that functions as a buffer memory. In addition, during reproduction, the DSP 31
28 reads from the flash memory 33 and SRA
The voice data written in M32 is converted into a voice signal again and output to the earphone 38.

In the voice recording device 10 according to the present invention, the flash memory 3 is used as a RAM for storing voice data and the like.
3 is used. This flash memory 33 has 4
The M-byte data storage area is divided into 64 blocks with management numbers, and voice data and phrase numbers are stored for each block. The SRAM 32 is 32K
It has a byte data storage area.

Reference numeral 34 denotes an operation key portion, which comprises the above-described reproduction key 15, recording key 21, past recording key 22, fast-forward key 18 and reverse return key 19.

Reference numeral 35 denotes an operation switch section, which is composed of the power switch 11, the erase switch 20 and the recording time changeover switch 23 described above.

Reference numeral 36 denotes a display unit, which is the above-mentioned display LE.
D24 or display LED 27.

Next, the operation of the voice recording apparatus according to the present invention configured as described above will be described separately for the recording operation, the reproducing operation and the past recording operation.

Recording operation: First, when the operator operates the power switch 11 to turn on the power, the CPU 28 searches the data storage area of the flash memory 33.

FIG. 4 is a conceptual diagram showing the relationship between the data storage area of the flash memory 33 and the address.

The flash memory 33 has 000000
It has a data storage area of 4 Mbytes designated by addresses from H to 3FFFFFH. Further, the data storage area is evenly divided into 64 blocks having management numbers 00 to 3F, and each block has a data storage area of 64 Kbytes. Therefore, 2048 frames can be continuously written in one block. Further, for convenience of explanation, it is assumed that the time required for recording or reproducing one block (2048 frames) of audio data is 1 minute 30 seconds.

FIG. 5 is a conceptual diagram showing a storage state of voice data in the flash memory 33, and shows a state in which no voice data is written in the data storage area of the flash memory 33.

In this state, the CPU 28 reads a predetermined number of data from the start address of each block, judges whether or not the phrase number is written, and
A phrase management table, a phrase-recording order management table, and a phrase-recording amount management table are created in the RAM 28b.

FIGS. 6 and 7 are conceptual diagrams showing a block-phrase management table, a phrase-recording order management table, and a phrase-recording amount management table. FIG.
7A shows a block-phrase management table,
6 (B) and 7 (B) show the phrase-recording order management table, and FIGS. 6 (C) and 7 (C) show the phrase-recording amount management table.

The CPU 28 reads a predetermined number of data from the head address of each block and writes the phrase number in the block-phrase management table. In this case,
Since voice data is not written, "FFH" is written for all phrase numbers to indicate that fact (see FIG. 6A). Further, if data other than "FFH" is written in all of this block-phrase management table, it means that voice data is written in all blocks, so the CPU 28 determines that recording is impossible. .

The CPU 28 creates the phrase-recording order management table after creating this block-phrase management table. In this case, all the phrase data in the block-phrase management table is "FFH". , It is judged that no voice data has been written at all, and as the data indicating the recording order of the phrases, "F
FH "is written (see FIG. 6B).

The CPU 28 creates the phrase-recording order management table and then the phrase-recording amount management table. In this case, all the phrase data in the block-phrase management table is "FFH". Therefore, it is determined that no audio data has been written,
As data indicating the amount of recorded phrases, "FFF" is used for all.
FH "is written (see FIG. 6C).

Next, when the operator presses the record key 21, the recording operation starts.

First, when the recording key 21 is pressed, the CPU 28 refers to the block-phrase management table and counts the number of blocks in which the phrase data is "FFH". In this case, since all the data are "FFH", it is possible to record in all 64 blocks, which is 1.5
(Minutes) × 64 = 96 (minutes) It is determined that there is a remaining recording amount.

Next, the CPU 28 refers to the phrase-recording order management table, and searches for the data having the largest recording order data other than "FFH". In this case, since all the data are "FFH", the CPU 28
Prepares "00H" as the data to be written in the recording order. However, if the data in the recording order has the largest value other than "FFH", the data obtained by adding 1 to the value is prepared as the data to be written in the recording order.

Then, the CPU 28 refers to the phrase-recording order management table in ascending order of phrase numbers, and searches for a record in which the recording order data is "FFH", that is, the smallest unused phrase. In this case, since the "00H" phrase corresponds to that, "00H" is written as the data in the recording order (see FIG. 7).
(See (B)), and the phrase to be recorded is
Recognize as "00H" phrase.

The CPU 28 refers to the block-phrase management table in ascending order of block number, and "FFH".
, That is, the smallest unused block is searched. In this case, all blocks are "FFH"
However, the 00th block having the smallest block number is recognized as the block to which the voice data is written, and the phrase number "00H" to be recorded is written in the block-phrase management table (see FIG. 7A).

Then, the CPU 28 means that one block is used as the recording amount data of the 00H phrase in the phrase-recording amount management table "0".
After writing "000H" (see FIG. 7C), the CPU
When 28 outputs a recording command and data indicating a phrase number to the DSP 31, recording is started.

First, the CPU 28 selects a display LED to blink according to the remaining recording amount. In this case, since the remaining recording amount is 96 minutes, the display LED 25 blinks at a normal speed. Further, during this recording, if the erasing switch 20 is moved in the direction of the arrow in FIG. 2 and the state is maintained for a predetermined time of 3 seconds or more, the oldest phrase is erased.

The voice to be recorded is converted into a voice signal by the built-in microphone 14 and input to the DSP 31. CP
When the voice data conversion command is received from U28, DSP31
After A / D converting a voice signal and encoding the voice signal, data compression is performed to generate voice data, a phrase number is added, and the voice data is written in the SRAM 32.

FIG. 8 is a conceptual diagram showing a storage state of the audio data written in the SRAM 32.

The DSP 31 informs the CPU 28 that the writing of the frame has started, and at the same time, the audio data consisting of 32 bytes and the phrase number are SR by frame.
After writing to AM32, write the next frame at address 00
Write from the data storage area specified by 0020H.
Then, this operation is cyclically repeated until the recording stop command is received from the CPU 28. However, cyclic means that after writing up to the address 7FFFFFH, returning to the address 000000H and repeating writing.

When the CPU 28 receives a message from the DSP 31 that writing of a frame has started, the SR
The flash memory 33 reads data for one frame from 000000H, which is the start address of the AM 32.
Start writing. Also, as described above, the CPU 2
Since No. 8 already recognizes that the block to which the audio data is written is the 00th block, the audio data for one frame is written in order from the data storage area designated by the start address 000000H of the block, and the remaining recording amount is also recorded. By subtracting the time corresponding to the number of frames of the written audio data from, the remaining recording amount during playback (that is,
Remaining time) is recognized, and the display LED to be blinked is changed according to the remaining recording amount. Further, in particular, when the remaining recording amount is less than 30 seconds, the blinking speed of the display LED 27 is set higher than usual in order to inform the operator of that fact.

Further, when the voice data cannot be written in the block currently being written during recording, the CPU 28 repeats this operation to rewrite the block-phrase management table and continuously pass the voice data to the next block. While writing the data, the recording amount data is rewritten by adding 1 to the recording amount data of the "00H" phrase in the phrase-recording amount management table.

FIG. 9 is a conceptual diagram showing a storage state of voice data in the flash memory 33, showing a state in which one frame of voice data and a phrase number are written in the flash memory 33 (in the figure, Shaded area).

At the time of recording, the CPU 28 recognizes the block in which the voice data of the flash memory 33 is being written, and when the voice data is written in all the data storage areas of the block, the block-phrase management table is assigned with the block number. The blocks are referred to in ascending order, the block in which the audio data is to be written next is selected, and the block-phrase management table and the phrase-recording amount management table are rewritten.

FIG. 10 is a conceptual diagram showing a storage state of voice data in the flash memory 33, and shows a state immediately after the operator presses the recording key 21 again during the recording operation to finish the recording.

The CPU 28 controls the 00th block through the 02nd block.
The voice data and phrase number are written over the three blocks up to the block (hatched part in the figure), and then, at the last address of the last block of the phrase, 2 bytes of data indicating the recording order of the phrase and the last Two bytes of data indicating the number of frames written in the block (that is, the 02nd block) are written. In this case the CPU 28
Is the first recorded phrase as the data indicating the recording order, so "0000H" is written, and if it is assumed that the half of the 02nd block is recorded as the data indicating the number of frames, "03FFH". Write.

FIG. 11 is a conceptual diagram showing a block-phrase management table, a phrase-recording order management table, and a phrase-recording amount management table.

FIG. 11A shows a block-phrase management table. In this case, 00th to 02nd
Since the voice data is written in the blocks and the voice data is not written in the other blocks, the CPU 2
In No. 8, “00H” indicating the first phrase is written as the phrase number of the 00th to 02nd blocks, and the phrase numbers of the other blocks remain “FFH”.

In the standby state immediately after the end of recording, the CPU 28 recognizes "00H" which is the number of this recorded phrase.

FIG. 11B shows a phrase-recording order management table, which is exactly the same as FIG. 7B.

FIG. 11C shows a phrase-recording amount management table. In this case, since the audio data is written in the three blocks of the 00th to 02nd blocks, the CPU 28 writes "0002H" which means the three blocks as the recording amount data of the 00th phrase.

Reproducing operation: Normally, the CPU 28 recognizes the recorded phrase as the phrase to be reproduced in the standby state immediately after the recording. However, when the fast forward key 18 or the reverse key 19 is clicked, the phrase is reproduced. -By referring to the recording order management table, the oldest phrase in the case of the fast forward key 18 is recognized as the phrase to be reproduced in the case of the reverse key 19 and the previously recorded phrase is recognized as the phrase to be reproduced.
In this case, since there is only one recorded phrase,
Clicking the fast forward key 18 or the reverse key 19 does not move the designation of the phrase to be reproduced.

Further, in the voice recording apparatus according to the present invention, it is possible to appropriately select and reproduce a plurality of recorded phrases by operating the fast forward key 18 and the reverse return key 19. Since it is not directly related to, I omit the explanation.

Next, when the operator presses the reproduction key 7, the reproduction operation starts.

As described above, the CPU 28 recognizes that the phrase to be reproduced is the 00th phrase, which is the latest phrase, and then refers to the block-phrase management table, and the latest phrase to be reproduced from that phrase number. The block number in which the audio data of is written is read and the blocks are reproduced in ascending order of block number. In this case, reproduction is performed in the order of the 00th block to the 02nd block (see FIG. 11).
(A)).

The CPU 28 refers to the phrase-recording amount management table and reads the number of blocks to be reproduced from the phrase number. In this case, the recording amount data is "00".
02H ", the number of blocks is recognized as 3 (see FIG. 11C), and the recording amount data recorded in the final address 4 bytes of the 02nd block having the largest block number (see FIG. 10). ), The total number of frames of the phrase to be reproduced is calculated and obtained by reading the number of frames of the voice data recorded in the last block. In this case, since the voice data is recorded in 2.5 blocks, 2048 × 2 .5 = 5120 (frame).
Therefore, in this case, 3 minutes and 45 seconds have been recorded.

First, the CPU 28 selects a display LED to be blinked according to the remaining reproduction amount. In this case, since the remaining reproduction amount is 7 minutes and 30 seconds, the display LED 26 blinks.

The CPU 28 sequentially reads the voice data of the 00th phrase in order from the beginning of the 00th block, and reads out 000000H which is the beginning address of the SRAM 32.
After writing the audio data in order from the data storage area designated by, a playback command is issued to the DSP 31. At this time, CP
U28 is SR from the total number of frames of audio data to be reproduced.
By subtracting the frame number of the audio data written in the AM 32, the remaining frame number (that is, the remaining time) of the phrase being reproduced is recognized, and the display LED to be blinked is changed according to the remaining reproduction amount. In particular, the remaining playback amount is 3
When it is less than 0 seconds, the blinking speed of the display LED 27 is set higher than usual in order to inform the operator of that fact.

The DSP 31 which has received the reproduction command is SRAM
The audio data compressed in order is read from the data storage area of 000000H which is the start address of 32, the data is expanded, D / A converted, the audio signal is output from the earphone jack 8 to the earphone 38, and the audio is reproduced. To do.

The CPU 28 performs the read and write operations of the audio data until the audio data of the 00th phrase is completely reproduced, that is, until the 02nd block is reproduced or the reproduction key 7 is pressed again. Then, when the reproduction is completed, a reproduction stop command is issued to the DSP 31. Moreover, the writing of the audio data to the SRAM 32 is performed cyclically. However, writing cyclically means repeating writing after writing to the final address of the SRAM 32 and then returning to the first address again.

The DSP 31 cyclically repeats the operation of reading and reproducing the audio data, but stops the reproduction when receiving the reproduction stop command from the CPU 28.

Past recording operation: FIG. 12 is a conceptual diagram showing a storage state of audio data written in the SRAM 32.

When the operator clicks the past record key 22 in the standby state immediately after the power is turned on, the CPU 28
The voice data creation command is output to the DSP 31. The voice to be recorded is converted into a voice signal by the built-in microphone 14 and input to the DSP 31, and the DSP 31 receiving the voice data conversion command from the CPU 28 performs A / D conversion of this voice signal and encodes it, and then performs data compression. Then, the voice data is created, the phrase number is added, and the voice data is written in the SRAM 32.

The DSP 31, as described in the recording operation,
The CPU 28 is notified that the writing of the frame has started, and the voice data consisting of 32 bytes and the phrase number are written in the SRAM 32 in frame units, and then the next frame is written from the data storage area specified by the address 000020H. Then, this operation is performed by the CPU
Repeat cyclically until a conversion stop command is received from 28.

At this time, the CPU 28 makes the DSP 31 SR
The head address of the latest frame written in the AM 32 (in this case, 000020H) and the past record key 22
After clicking, you are always aware of the total number of frames converted to audio data.

When the operator clicks the record key 21 in this state, past recording is started.

First, the CPU 28 determines that the total number of frames converted into the audio data after the past recording standby is 10
It judges whether or not the number of frames for seconds has been reached, and if it has reached that number, it scans addresses for a predetermined number of frames from the start address of the latest frame, reads from the audio data of that address in order, and flashes. Write in the memory 33. On the other hand, if the number has not reached the predetermined number, the operator clicks the past record key 22, then scoops out the addresses for the total number of frames converted into audio data, reads the audio data in order from that address, and writes it in the flash memory 33. Although writing is performed, the subsequent operation is the same as the recording operation, and thus the description thereof is omitted. However, this predetermined 10 seconds is
It is merely an example, and the present invention is not limited to this.

Then, the CPU 28 continues this past recording operation until the operator clicks the past recording key 22 again.

FIG. 13 is a flow chart showing the main routine of the voice recording method according to the present invention.

When the operator sets the power switch 11 to the "ON" position, the CPU 28 causes the steps S100 to S1.
At 02, the data stored in the flash memory 33 is read to create a block-phrase management table, a phrase-recording order management table, and a phrase-recording order management table.

Then, the CPU 28 proceeds to step S103.
Since it is just after the power is turned on, the latest phrase is selected as the phrase to be reproduced, and step S104
Move to

In step S104, the CPU 28 determines whether or not the operation key has been operated. If the operation key has not been operated, the process proceeds to step S106.
If the operation key is operated, the key operation subroutine is executed in step S105, and the process proceeds to step S106.

In step S106, the CPU 28 determines whether or not the operation switch is operated. If the operation switch is not operated, the process proceeds to step S104, while if the operation switch is operated, the step is performed. In S107, the operation designated by the operation of the operation switch is performed, the process proceeds to step S104, and this loop is repeated until the power switch 11 is set to the "OFF" position.

FIG. 14 is a flowchart showing a key operation subroutine of the voice recording method according to the present invention.

When the key operation subroutine is entered, the CPU 28 determines in step S200 whether or not the past record key 22 has been operated. If the key is not operated,
On the other hand, if the key is operated, the past recording subroutine is executed in step S201, and the process proceeds to step S202.

In step S202, the CPU 28 determines whether or not the recording key 21 is operated. If the key is not operated, the process proceeds to step S204. On the other hand, if the key is operated, Step S203
Then, the recording subroutine is executed, and the process proceeds to step S204.

In step S204, the CPU 28 determines whether or not the other key is operated. If the other key is not operated, the process is ended. On the other hand, if the other key is operated, the step 28 is performed. In S205, the operation designated by the key is performed, and the process ends.

FIG. 15 is a flow chart showing a past recording subroutine of the voice recording method according to the present invention.

When entering the past recording subroutine, the CPU 28 determines in step S300 whether or not the past recording key 22 has already been clicked and the past recording is in the standby state. If the past recording is in the standby state, the process ends. On the other hand, if it is not in the standby state, the process proceeds to step S302.

In step S302, the CPU 28 outputs a voice data creation command to the DSP 31, and the DSP 31 which receives the voice data conversion command A / D-converts the voice signal and encodes it, then compresses the data and outputs the voice data. Data is created, a phrase number is added, writing is started in the SRAM 32, and the process proceeds to step S303.

The CPU 28 executes DS in step S303.
The P31 stores the start address of the latest frame written in the SRAM 32, and the process proceeds to step S304.

The CPU 28 executes DS in step S305.
P31 stores the total number of frames converted into audio data, and ends.

FIG. 16 is a flow chart showing a recording subroutine of the voice recording method according to the present invention.

When the recording subroutine is entered, the CPU 28 determines in step S400 whether or not the past recording is in the standby state, and if it is in the standby state, the head of the latest frame written in the SRAM 32 by the DSP 31 in step S401. The address is skipped by an address corresponding to a phrase for 10 seconds, the address is designated as a recording start address, and the process proceeds to step S403.
The head address of the latest frame is designated as the recording start address, and the process proceeds to step S403.

In step S403, the CPU 28 determines whether or not there is an empty block that can be recorded. If there is no empty block, the process is ended. On the other hand, if there is an empty block, the process proceeds to step S404 and the block to be recorded. Select
Recording is started from a predetermined address (that is, a recording start address when recording is started, and an address to be recorded when recording is continued), and the process proceeds to step S405.

In step S405, the CPU 28 determines whether or not a predetermined time for defining the blinking speed of the display LED has elapsed. If not, step S407.
On the other hand, if it has passed, step S40
In 6, select the display LED, blink it at a predetermined speed,
The process moves to step S407.

In step S407, the CPU 28 determines whether or not the record key 21 is clicked. If the key is not clicked, the process proceeds to step S408. On the other hand, if the key is clicked, In step S409, recording is stopped and ended.

In step S408, the CPU 28 determines whether or not the audio data has been recorded in all the data storage areas of the block being recorded. If not recorded, the process proceeds to step S405, while the recording is performed. If so, the process proceeds to step S403.

The information recording medium according to the present invention has the audio recording method according to the present invention recorded on a floppy disk, a hard disk, an optical disk (LD, CD, DVD, etc.) or a semiconductor memory.

[0122]

As described above, according to the present invention, by clicking the past recording key, the past recording standby state is set, and the voice data is continuously and cyclically stored in the SRAM. Also, by clicking the record key in the past recording standby state, recording will start for a predetermined time from the time when the record key is clicked, so the operator can record from the beginning of a meeting or lecture. The situation of failing is drastically reduced.

[Brief description of the drawings]

FIG. 1 is an external view of a conventional voice recording device.

FIG. 2 is an external view of a voice recording device according to the present invention.

FIG. 3 is a block diagram showing a basic configuration of a voice recording device according to the present invention.

FIG. 4 is a conceptual diagram showing a relationship between a data storage area of a flash memory 33 and an address.

FIG. 5 is a conceptual diagram showing a storage state of audio data in a flash memory 33.

FIG. 6 is a block-phrase management table, phrase-
It is a conceptual diagram which shows a recording order management table and a phrase-recording amount management table.

FIG. 7: Block-phrase management table, phrase-
It is a conceptual diagram which shows a recording order management table and a phrase-recording amount management table.

FIG. 8 is a conceptual diagram showing a storage state of audio data written in SRAM 32.

FIG. 9 is a conceptual diagram showing a storage state of audio data in a flash memory 33.

FIG. 10 is a conceptual diagram showing a storage state of audio data in a flash memory 33.

FIG. 11 is a conceptual diagram showing a block-phrase management table, a phrase-recording order management table, and a phrase-recording amount management table.

FIG. 12 is a conceptual diagram showing a storage state of audio data written in SRAM 32.

FIG. 13 is a flowchart showing a main routine of a voice recording method according to the present invention.

FIG. 14 is a flowchart showing a key operation subroutine of a voice recording method according to the present invention.

FIG. 15 is a flowchart showing a past recording subroutine of a voice recording method according to the present invention.

FIG. 16 is a flowchart showing a recording subroutine of a voice recording method according to the present invention.

[Explanation of symbols]

 10 voice recording device 14 built-in microphone 15 playback key 18 fast forward key 19 reverse key 21 recording key 28 central control device 31 voice reproduction LSI 33 flash memory 34 operation key unit 35 operation switch unit 36 display unit

Claims (11)

[Claims] 1. A voice recording device for converting a series of input voice signals into digital value voice data and storing the voice data, wherein first input means for inputting a conversion command for converting the series of voice signals into the voice data. And a conversion unit that converts the series of audio signals into the audio data by a conversion command input by the first input unit, and the audio data converted by the conversion unit is circulated and continuously stored. First storage means, second input means for inputting a transfer instruction for transferring the voice data stored in the first storage means, and the voice currently written according to the transfer instruction input by the second input means A transfer unit for transferring the voice data stored in the first storage unit after a predetermined amount of data is transferred from the data, and the voice data transferred by the transfer unit. Second to store data
A voice recording device comprising: a storage unit. 2. The voice recording device according to claim 1, further comprising display means for displaying that the conversion means has started conversion of the series of audio signals into the audio data. Voice recording device. 3. The voice recording device according to claim 2, wherein the display means includes a lighting display means, and the lighting display means displays that the conversion is started by lighting. Characteristic voice recording device. 4. The voice recording device according to claim 2, wherein the display unit includes a blinking display unit, and the blinking display unit blinks to display that conversion is started. Characteristic voice recording device. 5. A voice recording method of a voice recording device for converting a series of input voice signals into voice data of a digital value and storing the voice data, wherein a conversion command for converting the series of voice signals into the voice data is input. A first step; a second step of converting the series of audio signals into the audio data according to the conversion command input in the first step; and a continuous circulation of the audio data converted in the second step. A third step of storing the voice data, a fourth step of inputting a transfer command for transferring the voice data stored in the third step, and the voice currently written according to the transfer command input in the fourth step. A fifth step of transferring the voice data stored in the third step after descent from the data by a predetermined amount, and the sound transferred in the fifth step. A sixth step of storing voice data, and a voice recording method comprising: 6. The voice recording method according to claim 5, further comprising a seventh step of displaying that conversion of the series of voice signals into the voice data is started in the second step. How to record voice. 7. The voice recording method for a voice recording apparatus according to claim 6, further comprising a lighting display means, wherein the seventh step indicates that the conversion is started by lighting the lighting display means. An audio recording method comprising: an eighth step. 8. The voice recording method for a voice recording apparatus according to claim 6, further comprising blinking display means, wherein the seventh step indicates that conversion is started by turning on the blinking display means. 9. A voice recording method comprising: a ninth step. 9. A voice recording device for converting a series of input voice signals into voice data of a digital value and storing the voice data, the third storage means circulating and storing the voice data continuously. Transfer means for transferring the voice data stored in the storage means, and a fourth means for storing the voice data transferred by the transfer means
A voice recording device comprising: a storage unit, wherein the transfer unit transfers the voice data after a predetermined amount of data is transferred from the voice data currently written in the third storage unit. 10. A voice recording method of a voice recording device for converting a series of input voice signals into voice data of a digital value and storing the voice data, a tenth step of circulating and continuously storing the voice data, The method includes an eleventh step of transferring the voice data stored in the tenth step, and a twelfth step of storing the voice data transferred in the eleventh step, wherein the eleventh step is currently performed in the tenth step. A voice recording method comprising: transferring the voice data after descent from the stored voice data by a predetermined data amount. 11. An information storage medium in which the voice recording method according to any one of claims 4 to 8 is recorded.