JP2002196794A - Voice recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voice recording and reproducing device with which security of voice data can be assured regardless of the type of the voice recording and reproducing device or the recording medium. SOLUTION: The voice recording/reproducing device is provided with a digital signal processing part 58 which encodes the inputted voice signal and converts the signal into the voice data, and a system control part 59 which records the voice data and the header information of the voice data as respectively separate files and records the management file for managing the correlation of the voice data file and the header information file on a recording medium 64, when a predetermined restriction is carried out to the readout of voice data from the recording medium 64, or edit in giving header information to the voice data and recording it on the recording medium 64.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio recording / reproducing apparatus.

[0002]

2. Description of the Related Art As one of audio recording / reproducing apparatuses, an IC recorder having a password function is known. Japanese Unexamined Patent Application Publication No. Hei 11-065935 discloses a secret function for setting a password in a specific folder so that messages in the folder cannot be read. In this case, the release of the secret function is also performed for each folder.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No.
Japanese Patent Application Laid-Open No. 65935 discloses only a secret function in an IC recorder in which a recording medium is built in a device. Therefore, in an IC recorder that records sound on a removable recording medium, if the removable recording medium is detached from the IC recorder and mounted on a PC, the secret function does not work, and the message in the folder is read. Can be.

[0004] Even an IC recorder having a built-in recording medium is of a type that can communicate data with an external PC.
In the case of the C recorder, since the audio data can be transmitted to the PC side, the secret function is invalidated.

The present invention has been made in view of such a problem, and an object of the present invention is to provide an audio recording / reproducing apparatus which can ensure the security of audio data regardless of the type of an audio recording / reproducing apparatus or a recording medium.

[0006]

In order to achieve the above object, an audio recording / reproducing apparatus according to a first aspect of the present invention comprises a converting means for encoding an input audio signal and converting it into audio data; Recording means for adding header information to data and recording the data on a recording medium; restricting means capable of restricting reading or editing of the audio data from the recording medium; and recording of the audio data in the restricting means. When the reading from the medium or the editing is restricted in a predetermined manner, at the time of recording the audio data, the audio data and the header information of the audio data are recorded as separate files, and A system for controlling the recording means so that a management file for managing the association between the audio data file and the header information file is recorded on the recording medium. And means.

According to a second aspect of the present invention, in the audio recording / reproducing apparatus according to the first aspect, the restricting means allows the operator to input a password and sets the password by the password setting means. Password checking means for checking whether or not the entered password and the password entered by the operator match, and the above-described method is used only when the password entered by the operator matches the password set by the password setting means. Permission to read or edit audio data.

[0008] Further, a third invention is a conversion means for encoding an input audio signal and converting it into audio data, a recording means for adding header information to the audio data and recording the same on a recording medium, Reading means from the recording medium of the data, or a limiting means capable of restricting the editing, and, in the limiting means, when there is no predetermined restriction on reading or editing the audio data from the recording medium, Data is recorded in the same file in the order of header information and audio data, and if the restriction means has a predetermined restriction on reading or editing the audio data from the recording medium, the above-described order is used. And control means for controlling the recording means so that the header information and the audio data are recorded in the same file in a different order from the recording means.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a system configuration of an IC recorder to which the audio recording / reproducing apparatus of the present invention is applied. This IC recorder comprises a microphone 50 and an amplifier 5
1, a recording signal input unit including a low-pass filter (LPF) 52, an A / D converter 53, a D / A converter 54, a low-pass filter (LPF) 55, an amplifier 56, and a speaker. 57, and a reproduction signal output unit comprising:

The A / D converter 53 and the D / A converter 54 are system control units for controlling the entire recorder mainly through a digital signal processing unit (DSP) 58 for compressing / decompressing audio signals and information. Section (CPU) 59. The digital signal processing unit 58 includes an encoding unit that encodes an input audio signal into audio data and a decoding unit that decodes the audio data and converts the audio data into an audio signal in order to realize the compression / expansion. Has a function.

The system control unit 59 has a recording (RE)
C) Operation switches 65 corresponding to various operation buttons such as playback (PLAY), stop (STOP), fast forward (FF), fast rewind (REW), and menu (MENU) are connected, and the drive circuit 61 A display 62 serving as a liquid crystal display (LCD) for displaying time data, operation status, and the like is connected thereto via the.

A recording medium 64 on which audio data and corresponding header information and a management file described later are recorded is formed of a rewritable nonvolatile memory such as a flash memory, and is attached and detached by an attachment / detachment mechanism (not shown). It is possible. Note that the recording medium 64 may be built in. The external communication circuit 60 is for connecting to, for example, a PC to transmit and receive data, and is connected to a USB (Univ.
personal Serial Bus) and RS232C.

In the above configuration, when an operation input such as recording, playback, or erasure is performed from the outside, the system control unit 5
9 detects this and shifts each unit to the corresponding state.
For example, when a recording operation is performed, the audio signal input from the microphone 50 is amplified by the amplifier 51, and unnecessary low-frequency components are removed by the low-pass filter 52, and then the digital signal is removed by the A / D converter 53. It is converted to an audio signal.

The digital signal processor 58 compresses the digital audio signal from the A / D converter 53 and outputs it to the system controller 59. The system control unit 59 writes the digital data from the digital signal processing unit 58 to a predetermined address of the recording medium 64. Also, the system control unit 59
The recording medium 59 also includes address management information indicating at which address the written digital data has been written.
Control for writing to a predetermined address in the address.

On the other hand, when a reproduction operation is performed, the system control unit 59 reads the reproduction target address information from the designated address of the recording medium 64 and reads the reproduction target digital data corresponding to the address information. Output to the digital signal processing unit 58. The digital signal processor 58 expands the digital data and converts the data into a D / A converter 5.
Output to 4. The D / A converter 54 converts the digital audio signal from the digital signal processing unit 58 into an analog audio signal. This analog audio signal is a low-pass filter (LP
F) After unnecessary high frequency components are removed in 55, the amplifier 5
6 and output from the speaker 57.

FIG. 2 is a diagram for explaining the main flow of the IC recorder according to the present embodiment. After the power is turned on, in step S1, initial settings including processes such as clearing the RAM, setting input / output of ports, and initializing the communication system are performed. It is monitored that the switch state changes due to the pressing of either of them (step S2). If the state of the REC switch changes to ON, the determination in step S3 becomes YES, and the process proceeds to step S4 to record (RE)
C) Execute the mode. Also, if the state of the playback switch is O
If it has changed to N, the determination in step S5 becomes YES and the process proceeds to step S6 to execute the reproduction (PLAY) mode.

If the state of the FF switch changes to ON, the determination in step S7 becomes YES, and the flow advances to step S8 to execute the fast-forward mode operation. Also, R
If the state of the EW switch changes to ON, the determination in step S9 becomes YES, and the process proceeds to step S10 to execute the fast reverse mode.

If the state of the menu switch has changed to ON, the determination in step S11 becomes YES, and the flow advances to step S12 to execute the menu setting mode.

If there is a communication request from the PC while connected to the PC, the determination in step S15 is Y.
It becomes ES and proceeds to step S16 to execute communication processing.

FIG. 3 is a flowchart for explaining the details of the menu setting mode (step S12) of FIG. The menu setting mode here includes a password setting process as a method for enabling the security function, and the recorded voice data cannot be read out or edited without confirming that the user is a specific operator. To do. The password can be set for each audio data or for each folder in which a plurality of audio data are bundled.

First, it is determined whether or not the operator has selected the setting of a password (step S20). If NO, the process proceeds to step S22, executes another menu setting mode, and returns. If the determination in step S20 is YES, the process proceeds to step S21 to wait for the operator to input a password in the password input waiting process. Next, in step S23, it is determined whether or not the input of all passwords has been completed. If NO, the process returns to step S21 to wait for input of the next password. Step S2 when input of all passwords is completed
The determination at 3 is YES, and the process proceeds to step S24. In step S24, the set information is recorded on the recording medium 64 or an EEPROM (not shown).
Return to 2. In the input of the password, for example, a method is conceivable in which a number (for example, 0 to 9) is selected while increasing or decreasing using a fast-forward button and a fast-return button, and then confirmed by pressing a play button.

FIG. 4 shows the REC mode (step S
It is a flowchart for demonstrating the detail of 4). First, it is determined whether a password has been set in step S3.
Judge with 0. If the determination here is NO, it is determined that the file is a normal file for which the security function is not set to be valid, and the audio data and the file header are paired and recorded in the same file as shown in FIG. 6 ( Step S32). If the determination in step S30 is YES, it is determined that the file is a file in which the security function is enabled, and the voice data and the corresponding file header are recorded in another file as shown in FIG.
Register in a management file for managing association information in which header information and audio data names are associated (step S
31). After step S32 or step S31, the process proceeds to step S33 to perform a recording process, and then proceeds to step S2.
Return to

FIG. 5 shows the PLAY mode (step S) of FIG.
It is a flowchart for demonstrating the detail of 6). First, a process of checking whether or not the file is a normal file (in this case, checking for the presence or absence of a header) is performed to determine whether or not the file is a normal file (steps S40 and S41). If there is a header, it is determined that the file is a normal file, and the process proceeds to step S45 to perform a reproduction process.

If it is determined in step S41 that there is no header, it is determined that the file is a file in which the security function is set valid, and the flow advances to step S42 to wait for input of a password. Next, the consistency of the password is determined based on whether the input password matches the password set in the process of the menu setting mode (FIG. 3) (step S43). If not, the file is reproduced. Without returning to step S2.
If they match, the file header is associated with the audio data by referring to the management file (step S4).
4), perform the reproduction process (step S45) and perform step S
Return to 2.

FIG. 8 shows the REC mode (step S
It is a flowchart for demonstrating the modification of 4).
First, it is determined whether a password has been set in step S.
The determination is made at 50, and in the case of NO, it is determined that the file is a normal file, and a file header and audio data are paired and recorded in the same file as shown in FIG. 10A (step S52). If the determination in step S50 is YES, it is determined that the file is a file in which the security function is set to be valid, and the positions of the file header and the audio data are switched as shown in FIG. (Step S51). After step S52 or step S51, the process proceeds to step S53 to perform a recording process, and returns to step S2. In step S51, the file header is recorded at the end of the audio data.
A file header may be recorded in the middle of the audio data.

FIG. 9 shows the PLAY mode of FIG. 2 (step S
It is a flowchart for demonstrating the modification of 6).
First, processing for confirming whether or not the file is a normal file (here, the recording position of the header is checked) is performed to determine whether or not the file is a normal file (steps S60 and S61). If the header is recorded at the beginning of the file, it is determined that the file is a normal file, and the flow advances to step S65 to perform a reproduction process.

If it is determined in step S61 that the header is not recorded at the head of the file, it is determined that the file is a file in which the security function is set valid, and the flow advances to step S62 to wait for input of a password.
Next, the consistency of the password is determined based on whether the input password matches the password set in the menu setting mode processing (FIG. 3) (step S).
63) If they do not match, the process returns to step S2 without performing the reproduction process of the file. If they match, the file header is read from the last address of the file (step S64), a reproduction process (step S65) is performed, and the process returns to step S2.

In the above-described embodiment, the file header and the audio data are recorded in separate files when the audio data is recorded. However, the security function is enabled for the audio data already recorded as a normal file. It is also possible to set. In this case, the audio data and the corresponding file header recorded in the same file are read out and recorded again in different files, and the association information is registered in the management file.

According to the above-described embodiment, it is possible to secure the security of the audio data regardless of the type of the audio recording / reproducing apparatus or the recording medium, and prevent the reading or editing of the data.

The above specific embodiments are summarized as follows.

1. The audio recording / reproducing apparatus according to the present embodiment includes a converting unit that encodes an input audio signal and converts the audio signal into audio data; a recording unit that adds header information to the audio data and records the audio data on a recording medium; A restricting means capable of restricting reading or editing from the medium, and, when the restricting means restricts reading or editing of the audio data from the recording medium in a predetermined manner, the recording of the audio data is restricted. At this time, the audio data and the header information of the audio data are recorded as separate files, and the recording unit is controlled to record a management file for managing the association between the audio data file and the header information file on a recording medium. Control means for performing the operation.

1. Are converted by the digital signal processing unit 58 in FIG. 1, and the recording unit, the limiting unit, and the control unit are realized by the system control unit 59 in FIG.

2.1. Wherein said restricting means comprises a password setting means for setting a password, and a password confirmation means for prompting an operator to input a password, and confirming whether or not the password set by said password setting means and the password entered by the operator match. Means for reading or editing the audio data only when the password input by the operator matches the password set by the password setting means.

3.2. , The setting of the password is performed for each audio data.

4.2. And a folder management means for managing the audio data as a folder by bundling a plurality of the audio data, and setting the password is performed for each of the folders.

4. Is realized by the system control unit 59 in FIG.

5. The audio recording / reproducing apparatus according to the present embodiment includes a converting unit that encodes an input audio signal and converts the audio signal into audio data; a recording unit that adds header information to the audio data and records the audio data on a recording medium; A limiter capable of restricting reading or editing from a medium, and, in the above limiter, when a predetermined limit is not imposed on reading or editing of audio data from a recording medium, the same is stored in the same file. The header information and the data are recorded in the order of the audio data, and when the reading of the audio data from the recording medium or the editing is restricted by the restricting means in a predetermined order, the data is recorded in a different order from the above order. Control means for controlling the recording means so as to record the header information and the audio data in the same file.

5. Are converted by the digital signal processing unit 58 in FIG. 1, and the recording unit, the limiting unit, and the control unit are realized by the system control unit 59 in FIG.

6. An audio recording and reproducing device according to the present embodiment includes a recording medium storing an audio file having audio data and header information for managing the audio data,
Restriction setting means capable of setting the restriction of reading or editing of the audio file from the recording medium or one or more audio files, and the audio data and header information of the audio file in which the restriction is set. Recording means for dividing and recording each of the audio data file and the header information file separately, and recording association information between the audio data file and the header information file in a management file;

6. Is the recording medium 6 in FIG.
4, the recording unit, the limit setting unit, and the recording unit are realized by the system control unit 59 in FIG.

[0041]

According to the present invention, there is provided an audio recording / reproducing apparatus capable of ensuring the security of audio data regardless of the type of the audio recording / reproducing apparatus or recording medium.

[Brief description of the drawings]

FIG. 1 is an external perspective view of an IC recorder to which an audio recording / reproducing device of the present invention is applied.

FIG. 2 is a diagram showing a system configuration of an IC recorder according to the embodiment.

FIG. 3 is a diagram for explaining a main flow of the IC recorder according to the embodiment.

FIG. 4 is a flowchart illustrating details of a REC mode (step S4) of FIG. 2;

FIG. 5 is a flowchart illustrating details of a PLAY mode (step S6) of FIG. 2;

FIG. 6 is a diagram for explaining a method of recording a normal file.

FIG. 7 is a diagram for explaining a recording method of a file in which a security function is set to be valid.

FIG. 8 is a flowchart illustrating a modified example of the REC mode (step S4) of FIG. 2;

FIG. 9 is a flowchart for explaining a modification of the PLAY mode (step S6) of FIG. 2;

10A is a diagram illustrating a recording format of a normal file, and FIG. 10B is a diagram illustrating a recording format of a file in which a security function is set to be valid;

[Explanation of symbols]

 Reference Signs List 50 microphone 51 amplifier 52 low-pass filter (LPF) 53 A / D converter 54 D / A converter 55 low-pass filter (LPF) 56 amplifier 57 speaker 58 digital signal processing unit (DSP) 59 system control unit (CPU) 60 external communication Circuit 61 Drive circuit 62 Display 64 Recording medium 65 Operation switches

Claims (3)

[Claims] A converting unit that encodes an input audio signal and converts the encoded audio signal into audio data; a recording unit that adds header information to the audio data and records the audio data on a recording medium; Reading means for restricting reading or editing; and in the limiting means, when reading or editing of the audio data from the recording medium is restricted in a predetermined manner, the recording of the audio data is restricted. At this time, the audio data and the header information of the audio data are recorded as separate files, and a management file for managing the association between the audio data file and the header information file is recorded on the recording medium. An audio recording / reproducing apparatus, comprising: a control unit for controlling the recording unit. A password setting means for setting a password; and an operator inputting the password,
Password checking means for checking whether or not the password set by the password setting means and the password input by the operator match, wherein the password input by the operator is the same as the password set by the password setting means. 2. The audio recording / reproducing apparatus according to claim 1, wherein reading or editing of the audio data is permitted only when they match. 3. A conversion means for encoding an input audio signal to convert the audio signal into audio data; a recording means for adding header information to the audio data and recording the audio data on a recording medium; Limiting means capable of restricting reading or editing; and in the limiting means, when reading or editing of the audio data from the recording medium is not restricted in a predetermined manner, header information is contained in the same file. When the data is recorded in the order of the audio data, and when the restriction means has a predetermined restriction on reading or editing the audio data from the recording medium, the header is recorded in a different order from the above order. Control means for controlling the recording means so as to record information and audio data in the same file;
An audio recording / reproducing device comprising: