JPH1152999A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing device in which operability is improved by reproducing up-to-date voice data first. SOLUTION: When a sound recording button is pressed, a microcomputer (CPU) 32 stores voice data in a PCM data block of a flash memory 9. When a stop button is pressed, the CPU 32 writes mode setting data, a start address, and an end address in an ADR data section of an index stage block consisting of file data with voice data of seventh order as an ID number 01. And the CPU 32 writes mode setting data, a start address, and an end address of respective ID number with the original ID number 01-ID number 06 as ID number 02-ID number 07.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a recording / reproducing apparatus using a flash memory as a recording medium.

[0002]

2. Description of the Related Art Today, a recording / reproducing apparatus capable of recording / reproducing a sound simply as if a content of a conference or a lecture is described on a memo sheet is provided. The recording / reproducing apparatus uses a flash memory as a recording medium, stores one audio signal as a predetermined number of files, reproduces an audio signal for each case, and outputs audio. More specifically, the recording / reproducing apparatus stores audio data composed of a plurality of files in a flash memory, and reproduces audio signals in order from an old file at the time of reproduction.

[0003]

By the way, for example, when a meeting record or the like is described on a memo sheet, since the latest contents are described on a page after the memo sheet, the page is turned each time when reading back later. Need
It can be very inconvenient.

[0004] Similarly, in the above-mentioned recording / reproducing apparatus, the latest sound is stored in the flash memory as the last file, and it becomes necessary to search for the file before reproducing the file, which is extremely inconvenient. Was.

[0005] In addition, files that are no longer needed can be deleted each time. However, when files need to be reproduced again, or when new messages are recorded one after another immediately before deletion, important files are deleted. Items tend to be recorded at the end. Therefore, the more files you record, the less files you need to access and those that are not important requirements will be played first, and the latest file just recorded will be played to the end Tend to be.

[0006] In this case, in order to reproduce the audio signal of the latest important file, it is necessary for the user to perform an operation of specifically searching for the file. Therefore, the user has to perform many operations to reproduce the necessary file. It is time-consuming and requires improved operability.

The present invention has been proposed in view of such circumstances, and it is an object of the present invention to provide a recording / reproducing apparatus in which the latest audio signal is reproduced first to improve operability.

[0008]

In order to solve the above-mentioned problems, a recording / reproducing apparatus according to the present invention comprises: a sound input unit for obtaining a sound signal corresponding to an input sound; A storage unit for storing a signal and management information for managing a reproduction order for each file; a control unit for controlling writing of an audio signal to the storage unit and reading of an audio signal from the storage unit; Audio output means for outputting audio corresponding to the audio signal.

In the recording / reproducing apparatus, at the time of recording, the audio signal from the audio input means is newly written in the storage means as one file, and the file is newly written while keeping the order of the already stored files. Control is performed to rewrite the management information so that the playback order of the files is first. At the time of playback, control is performed to read out the file of the audio signal in the playback order based on the management information.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The present invention is applied to, for example, an IC recorder 1 having a configuration as shown in FIG.

The IC recorder 1 is an EEPROM (Electrical Erasable / Prograb) which is a nonvolatile memory in which data can be electrically erased / rewritten by the recording unit 10.
mmable Read-Only Memory), that is, a control unit 30 for storing audio data in the flash memory 9 and controlling the audio data in the flash memory 9 to be reproduced by the reproduction unit 20. The content and the content of the audio data in the flash memory 9 are displayed.

The recording unit 10 includes a micro horn 11 for converting a sound into an electric signal and outputting a sound signal, an amplifier 12 for amplifying a sound signal from the micro horn 11,
An automatic gain control circuit (hereinafter, “AGC”) that controls the gain of the audio signal amplified by the amplifier 12.
troller. ) 13, an encoder 14 for converting the audio signal from the AGC 13 into audio data, and a buffer memory 1 for temporarily storing the audio data from the encoder 14.
5 is provided.

The microphone 11 converts an input sound into an audio signal and supplies the audio signal to the amplifier 12.
The audio signal is amplified and supplied to the AGC 13. AGC13
Supplies the audio signal amplified by the amplifier 12 to the encoder 14 by performing gain control so that the gain becomes a predetermined value.

The encoder 14 has, for example, an adaptive differential pulse code modulation (hereinafter referred to as “ADPCM”) because the audio signal has a strong temporal correlation.
It is called rential Pulse Code Modulation. ) Method, an audio signal is encoded to generate audio data, and this audio data is supplied to the flash memory 9 via the buffer memory 15.

The encoder 14 can adjust the encoding amount of the audio data according to the two modes. For example, the encoder 14 performs sampling at 8 kHz in the SP mode.
In the LP mode, sampling is performed at 4 kHz.
The encoding amount of the audio signal is adjusted in the time axis direction.

On the other hand, the reproducing section 20 is provided with the flash memory 9.
A decoder 21 for converting the audio data read out from the original audio signal into an original audio signal, a filter 22 for removing high-frequency components,
And an amplifier 23 for amplifying the audio signal from the filter 22 and supplying the amplified signal to the speaker 24.

The decoder 21 corresponds to the encoder 14 of the recording unit 10 and has the above-described SP mode or LP mode.
The audio data read from the flash memory 9 according to the mode, that is, audio data encoded by the ADPCM method is decoded to generate a so-called PAM signal. The filter 22 removes high-frequency components above the audio band from the PAM signal and outputs an audio signal. Amplifier 23
The audio signal supplied from the decoder 21 is amplified to drive the speaker 24. Thus, the recorded sound is output from the speaker 24.

The control unit 30 has a ROM 3 in which a program for controlling the operation of the IC recorder 1 is stored.
1 and a microcomputer (hereinafter referred to as a CP) that executes a program stored in the ROM 31 to control the flash memory 9, the recording unit 10, the reproducing unit 20, and the display unit 30.
U. ) 32 and a timer 33 for generating time information
And a random access memory (hereinafter, RAM: Random A) for temporarily storing the time, the execution result of the program, and the like.
It is called ccess Memory. ) 34, and controls each circuit based on the operation setting of the operation unit 50.

When the timer 33 reaches a predetermined time, for example, the CPU 32 performs control to read out audio data recorded in the flash memory 9.

The display section 40 includes a low power consumption liquid crystal display panel 41 and a backlight 42 for illuminating the liquid crystal display panel 41, and displays the operation state and operation procedure of the IC recorder 1.

The above-described recording unit 10, reproducing unit 20, and control unit 30 are provided in a housing 60 shown in FIG. As shown in FIG. 2, a display panel 4 is provided on the operation surface of the housing 60.
1 is provided so as to face the outside, and further, an operation unit 50 for performing operations such as recording and reproduction is provided.

The operation unit 50 includes a file button 51, a menu button 52, a priority button 53, a jog dial 54, a stop button 55,
It has a recording button 56, an erase button 57, and a hold switch 58.

The file button 51 is used to change a file. One piece of audio data is
It consists of one or more files. Menu button 52
Sets the mode state to the menu mode. When the menu mode is set, various operation settings can be made by the jog dial 54. The priority button 53 is for switching and setting the priority of the recorded file. The stop button 55 is used to stop the operation during recording or playback. The recording button 56 is for starting recording. Delete button 5
Numeral 7 is for erasing one audio data during reproduction or stop. The hold switch 58 is a slide switch for maintaining a state of operation or stop, and enables or disables button operation by setting switching of hold on / off.

Here, the flash memory 9 is, for example, a NAND type. The flash memory 9
In addition to storing the audio data supplied from the buffer memory 15, management information (hereinafter referred to as TOC information) for managing audio data indicating in which area the audio data is stored is stored. The flash memory 9 has a capacity of 8 × 16 Mbits, and can store 16 minutes of audio data corresponding to an audio signal of 200 to 3400 Hz in the SP mode, and an audio signal of 200 to 1700 Hz in the LP mode. Can be stored for 24 minutes.

As shown in FIG. 3, audio data and the like are divided and stored in the flash memory 9 for every 512 blocks as an erasing unit. These blocks are divided into six types. Specifically, the eternal block (one block) and the index stage 0
Block (6 blocks), Index stage 1 block (6 blocks), Backup block (1 block), Work area block (15 blocks)
And PCM data blocks (469 blocks).

The above TOC information includes an eternal block, an index stage 0 block, an index stage 1 block, a backup block, and a work area block. Note that the audio data is written in a PCM data block.

As shown in FIG. 3, each block is composed of a set of 16 pages (= 528 bytes), and has a page 0, a page 1,..., A page 14, and a page 15. This one page has a data area of 512 bytes and one
It consists of a 6-byte redundant area. Note that there are a maximum of 10 blocks in which data cannot be recorded and reproduced (hereinafter, referred to as “invalid blocks”).

Here, the eternal block is provided other than the first or last block of the flash memory 9, that is, other than the first or last address. The eternal block is the TOC information that is read first,
Based on this data, an index stage 0 block, an index stage 1 block, and the like are read.
As described above, the eternal block is important for reading data, and is arranged so as to avoid a head or an end of an address, which is a place most likely to be destroyed at the time of abnormal operation such as static electricity or abnormal voltage. I have. That is, for example, even if a block in which audio data is recorded is destroyed, once the data of the block is erased, no problem occurs thereafter. However, if the eternal block is destroyed, it becomes impossible to read all data. Therefore, to avoid this, the eternal block is provided in a block other than the head or last of the address as described above. .

In the eternal block, page 0
Only page 1 to page 15 and no data.

As shown in FIG. 4, specifically, page 0 of the eternal block includes 4-byte data for recognizing the eternal block, a 2-byte eternal block address, a 2-byte index stage 0 address, and a 2-byte index stage 0 address. Byte index stage 1 address, 2
Byte work area block start address and 4
It has byte dummy data and a 128 byte blank map. The blank map indicates the location of the above-mentioned invalid block.

The index stage 0 block and the index stage 1 block have the same configuration, and are rewritten alternately each time data is rewritten. That is, when audio data is written, for example, data of the index stage 0 block is rewritten, and when audio data is written again, data of the index stage 1 block is rewritten. Hereinafter, these blocks will be collectively referred to as index stage blocks.

As described above, there are six index stage blocks, each of which includes file data (5 blocks) and stage data (1 block).

As shown in FIG. 5, the index stage block composed of file data is composed of an ADR data section on page 0 to page 11 and an HDR section on page 12 to page 15.

As shown in FIG. 6, the ADR data portion includes, for example, ID numbers “01” to “06” and, for each file in which audio data is recorded, the SP or LP of the file. "SP" indicating the mode, "STH" indicating the upper start address of the file, "STM" indicating the lower start address, "ENH" indicating the upper end address of the file, and the lower end address. "ENM" as shown in FIG.

For example, when six voice data are recorded, as shown in FIG.
The ID numbers “01” to “06” corresponding to each case are recorded. The ID numbers indicate the order of reproduction of the six recorded audio data. And
For each ID number, the recording mode (SP), the start address (STH, STM) and the end address (ENH, EN) of the location where audio data of that ID number is recorded
M) is recorded. In addition, ID number 01 and ID
Since the capacity of the voice data 03 is large, as shown in FIG. 6, for example, the ID number 01 is composed of two files, and the ID number 03 is composed of four files. At this time, a recording mode, a start address, and an end address are recorded for each file.

As shown in FIG. 7, the HDR data section includes, for each file, "PRI" indicating the priority of the file, "ALM" indicating ON / OFF of the alarm set, and the month when the alarm sounds. "AMO", "ADA", "AHO", "AM" indicating day, hour, minute, day of the week
I "and" AOW ". Here, the priority indicates the priority of reproduction of the audio data file. The HDR data section is updated every time there is a change in the priority or alarm setting, even if the audio data is not updated.

On the other hand, as shown in FIG. 8, an index stage block composed of stage data is a valid mark on page 0, a mode interruption mark on page 1, a blank map on page 2, and a blank map on page 3. Eternal block blank map.

The backup block is a backup of the above-mentioned eternal block, and is a copy of the eternal block. Therefore, when the eternal block is newly rewritten, the backup block is similarly rewritten. The number of backup blocks need not be one, but may be plural.

The work area block is an area for temporarily storing index data when recording audio data. As shown in FIG. 9, the work area block has substantially the same configuration as the index stage block, and includes an ID number, SP / LP information, an upper start address of audio data, and a lower start address of audio data. , The upper end address of the audio data, and the lower end address of the audio data, each having 1 byte. Therefore, in this work area block, the index stage block is rewritten while reading the data of the work area block, and the data such as the start address is written as it is.

The PCM data block is an area in which audio data is mainly recorded. In the PCM data block, as shown in FIG. 10, not only the audio data for each page, but also the year, month,
The day, hour, minute, second, and day of the week are also recorded. Specifically, on one page, 512 bytes of audio data, one byte of data of year, month, day, hour, minute, second, day of the week, and one byte of clock set flag are recorded.

In the IC recorder 1 configured as described above, when the recording button 56 is pressed while recording or reproduction is not being performed, the CPU 32 controls to write audio data to the flash memory 9. It is assumed that the flash memory 9 has already recorded six audio data as shown in FIG.

More specifically, when the recording button 56 is pressed, the CPU 32 reads out a program corresponding to the recording mode from the ROM 31 and executes the same.
The GC 13, the encoder 14 and the like are operated, and the audio data delayed for a predetermined time is stored in the PCM data block of the flash memory 9 via the buffer memory 15.

The CPU 32 records 512 bytes of audio data for each PCM data block, and also records the date and time of the recording in the PCM data block. Until the stop button 55 is pressed, the CPU 32 performs control to write the above audio data as one record in each PCM data block.

When the stop button 55 is pressed, the CPU 32 stops the control of recording the audio data in the PCM data block and rewrites the TOC information. Specifically, the index stage block is rewritten.

The CPU 32 writes mode setting, start address and end address data in the ADR data portion of the index stage block composed of file data, with the seventh audio data as the ID number 01. Then, the CPU 32 determines that the original ID number 0
1 to ID number 06 are replaced with ID number 02 to ID number 07
The data of the mode setting of each ID number, the start address and the end address are written.

As described above, the CPU 32 sets the ID of the newly recorded seventh voice data as shown in FIG.
The TOC information is rewritten by sliding the original ID number 01 to ID number 06 one by one as ID number 02 to ID number 07, respectively. That is, the latest audio data is recorded as ID number 1.

Next, a case where audio data is reproduced will be described. When the user presses the jog dial 54 shown in FIG.
2 starts reproduction. That is, the CPU 32 recognizes the external block from the flash memory 9 by using the external block recognition data, and reads the data of the external block.
When the CPU 32 cannot recognize the eternal block shown in FIG. 3, it recognizes the backup block and reads the data of the backup block.

The CPU 32 reads the data of the index stage block based on the index stage 0 address or the index stage 1 address in the above-mentioned external block or backup block.

The CPU 32 controls reading of audio data in the PCM data block based on the ADR data section of the index stage block composed of file data. At this time, the CPU 32 determines the ID number 01,
Audio data is read out in the order of ID number 02, ID number 03,. Specifically, the CPU 32 first sets A
Start address of ID number 01 in the DR data section (S
TH, STM) and end address (ENH, ENM)
, The voice data of ID number 01 is read out.
The read audio data is supplied to the decoder 21 and the filter 2.
The signal is converted into an audio signal via the second or the like and supplied to the speaker 24. Therefore, the speaker 24 has the ID number 0
1 can be output.

The CPU 32 has a stop button 55 shown in FIG.
The reading of the audio data is continued until is pressed. Therefore, the CPU 32 determines the ID number 01 as described above.
Are output from the speaker 24, the audio data is read out in the order of ID number 02, ID number 03,.

As described above, the IC recorder 1 stores the latest voice data in the flash memory 9 as the ID number 01 every time a voice is recorded as shown in FIG. .. Are performed in the order of number 01, ID number 02, ID number 03,. Since the voice data of the new ID number is more important than the voice data of the old ID number, the more important items are set at the beginning of the ID number by the above-described control by the above-described control. It is no longer necessary to search for the latest message, thereby improving operability.

In addition, the IC recorder 1 can record one message by adding another message to the already recorded message and record it (follow-up recording). At this time, the CPU 32
Performs the processing from step S1 shown in FIG.

When the user presses the record button 56 while the IC recorder 1 is reproducing, for example, the voice data of the ID number 02 (step S1), the CPU 32 activates the timer 33, and the record button 56 It is determined whether the button is pressed for more than a second (step S2). CPU32
When it is determined that the record button is pressed for one second or more, the reproduction of the audio data of ID number 02 is stopped (step S3), and when it is not pressed for one second or more, the reproduction is continued as it is.

After stopping the reproduction, the CPU 32 starts recording the sound input to the microphone 11 (step S4), and performs control to write the sound data to the PCM data block in the flash memory 9. And CPU3
2 continues recording until the stop button 55 is pressed or the capacity of the flash memory 9 becomes full (step S).
5). Then, when the stop button 55 is pressed or the capacity of the flash memory 9 becomes full, the CPU 32 stops recording (step S6).

When the recording is stopped, the CPU 32 rewrites the TOC information of the audio data (step S7).
Specifically, as shown in FIG. 13, the CPU 32 executes the AD stage of the index stage block composed of the file data.
In the R data portion, first, the start addresses (ST
H, STM) and end address (ENH, ENM) are written. Next, the CPU 32 writes a start address and an end address indicating the recording position of the newly added audio data as the ID number 02, and
Control is performed to rewrite the start address and the like of the audio data after the ID number 03 before recording. As described above, the CPU 32 adds the newly added audio data to the I
The start address (STH,
STM) and end address (ENH, ENM) are written.

Accordingly, when the IC recorder 1 starts reproduction as described above, the ID number 01, the ID number 0
The audio data is reproduced in the order of 2,. At this time,
The task of the additional recording is output from the speaker 24 when the ID number 02 is being reproduced, as shown in FIG.

That is, the IC recorder 1 can select any one of a plurality of already recorded messages and add a new message to the selected message to record a new message. This allows the user to use the same ID number for the voice data of the already recorded message and the voice data of the new message when newly recording a message related to the already recorded message. Can be treated as a single task. Therefore, when related items are recorded separately, the operability can be improved by eliminating the trouble of searching for those items. Further, since there is no need to change the configuration of the operation unit 50, the above-described additional recording can be performed without increasing the production cost.

In the above-described embodiment, when the recording button 56 is pressed for one second or more while a predetermined file is being reproduced, the trailing recording mode is set. It is not limited to.

For example, if the user stops the reproduction of the file with the ID number 02 and then presses the record button 56 for a predetermined time (for example, 2 seconds), the CPU 32 enters the follow-up recording mode and the step shown in FIG. By performing the processing after S4, new audio data may be recorded in the flash memory 9 as the ID number 02.

[0060]

As described above in detail, according to the recording / reproducing apparatus according to the present invention, the audio signal output from the audio input means is written into the storage means as one file, and the file of the already stored file is written. The control is performed to rewrite the management information so that the playback order of the written file is first, leaving the order as it is, and at the time of playback, the audio signal file is read out in the playback order based on the management information, so that the audio of the latest file is read. It can be reproduced from the signal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a specific configuration of an IC recorder to which the present invention is applied.

FIG. 2 is an external front view of the IC recorder.

FIG. 3 is a configuration diagram of a flash memory of the IC recorder.

FIG. 4 is a configuration diagram of an external block of the flash memory.

FIG. 5 is a configuration diagram of an index stage block composed of file data of the flash memory.

FIG. 6 is a configuration diagram of an ADR data section of the index stage block.

FIG. 7 is a configuration diagram of an HDR data section of the index stage block.

FIG. 8 is a configuration diagram of an index stage block composed of file data of the flash memory.

FIG. 9 is a configuration diagram of a work area block of the flash memory.

FIG. 10 is a configuration diagram of a PCM data block of the flash memory.

FIG. 11 is an explanatory diagram of a recording position of newly recorded audio data.

FIG. 12 is a flowchart for explaining the operation of the CPU when newly recording voice data as an ID number 02;

FIG. 13 shows the AD of the index stage block when new voice data is additionally recorded as ID number 02.
FIG. 3 is a configuration diagram of an R data unit.

FIG. 14 is an explanatory diagram of a recording position of audio data newly added as an ID number 02;

[Explanation of symbols]

11 micro horn, 9 flash memory, 24
Speaker, 32 CPU

Claims (2)

[Claims] 1. An audio input unit for obtaining an audio signal corresponding to an input audio, a storage unit for storing an audio signal divided for each file, and management information for managing a reproduction order for each file; Sometimes, the audio signal from the audio input means is newly written in the storage means, and the order of the files already stored is kept as it is so that the reproduction order of the files constituting the newly written audio signal is made first. Control means for performing control for rewriting the management information, and for reading out audio signal files in a reproduction order based on the management information at the time of reproduction; and audio output means for outputting audio in accordance with the read audio signal. Recording and reproducing device. 2. The storage means stores, for each file, a reproduction order and management information including a start address and an end address of the file. Control is performed to rewrite the management information so that the reproduction order of the newly written file is first and the start address and the end address of the file are added while leaving the address and the end address as they are. 2. The recording / reproducing apparatus according to claim 1, wherein control is performed to read files corresponding to the start address and the end address in order.