JPH07129199A - Sound recording device - Google Patents

Abstract

PURPOSE:To prevent undue forging by any third party by selecting whether compilation of the recorded voice information is to be prohibited, and recording in the case of prohibition, a specified prohibition data incapable of alteration in a semiconductor memory. CONSTITUTION:A memory control part 5 controls the input/output motions of signals between a voice memory part 6 and an encoding/decoding part 4, while an address counter 7 performs counting according to the address data given from a system control part 11, and address specification is made to a voice memory part 6. Besides the operating buttons for recording, reproducing, stopping, etc., an operation entering part 12 is equipped with an operational button for partial insertion or partial erasure and a select button to select whether compilation such as partial insertion or partial erasure is to be prohibited. The operation entering part 12 selects whether the data compilation is prohibited depending upon the recorded contents for each series of recorded voice information pieces, and in case to be prohibited, the specified prohibit data incapable of alteration is recorded in a voice memory part 6 consisting of semiconductor memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice recording device.

[0002]

2. Description of the Related Art As one of audio recording devices, an audio signal obtained from a microphone is converted into a digital signal and recorded in a semiconductor memory, and the digital audio signal recorded in the semiconductor memory is read during reproduction. After that, I convert it to an analog signal and output it through the speaker I
There is a C recorder.

Japanese Unexamined Patent Publication No. 63-259900 discloses lock data for preventing erroneous erasure in order to solve the problem of accidentally erasing information once recorded, such as important voice, in such an IC recorder. Is written in the semiconductor memory to prevent the data in the entire memory from being erased. Further, since this IC recorder can erase the lock data by a predetermined operation, it is possible to falsify the already recorded data.

[0004]

However, in the above-mentioned Japanese Patent Laid-Open No. 63-259900, it is possible to prevent the data in the entire memory from being erased, but the recorded contents are recorded for each series of recorded audio information. Therefore, it was not possible to select whether or not to prohibit data editing such as partial insertion and partial deletion.

Further, as described above, since the lock data can be erased by a predetermined operation, there is a possibility that a third party may illegally erase the lock data and falsify the data.

The audio recording apparatus of the present invention has been made in view of such a problem, and its purpose is to prohibit editing for each series of recorded audio information according to the recorded contents. It is an object of the present invention to provide a voice recording device capable of selecting whether or not it is possible and preventing unauthorized editing by a third party by prohibiting editing once and then making it uneditable again.

[0007]

In order to achieve the above object, the present invention relates to an audio recording apparatus for digitizing an audio signal and recording the same in a semiconductor memory, after recording a series of audio information, A selection unit for selecting whether or not to prohibit the editing of the voice information and a prohibition data recording unit for recording predetermined unchangeable prohibition data in the semiconductor memory when the editing is prohibited.

[0008]

That is, in the voice recording apparatus of the present invention,
After recording a series of digitized audio information in the semiconductor memory, select whether to prohibit editing of the series of audio information. When prohibiting editing, a predetermined prohibition that cannot be changed in the semiconductor memory. Record the data.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an IC recorder to which the voice recording device of the present invention is applied. In the figure, the microphone 1 is connected to the first terminal of the encoding / decoding unit 4 via the microphone amplifier 2 and the A / D converter 3.

On the other hand, the speaker 10 has a power amplifier 9 and a D
It is connected to the second terminal of the encoding / decoding unit 4 via the / A converter 8. The third terminal of the encoding / decoding unit 4 is connected to the audio memory unit 6 composed of a semiconductor memory via the memory-control unit 5. The voice memory unit 6 includes an index table, which will be described later, and is connected to the address counter 7.

Further, the system control unit 11 is connected to the encoding / decoding unit 4, the memory control unit 5, the address counter 7, and the operation input unit 12.

In the above structure, the memory control section 5 controls the input / output operation of signals between the audio memory section 6 and the encoding / decoding section 4. Further, the address counter 7 performs a counting operation according to the address data given from the system control unit 11 to address the voice memory unit 6. In addition, the operation input unit 12 is a recording (not shown),
In addition to operation buttons for playback, stop, etc., operation buttons for partial insertion or partial deletion and selection buttons for selecting whether to prohibit editing such as partial insertion or partial deletion are provided. An operation signal generated by operating the button is output to the system control unit 11.

The overall operation of the above configuration will be described below. At the time of recording, the analog audio signal input from the microphone 1 is amplified by the microphone amplifier 2 and then the A / D converter 3
Are converted into digital voice data by. The encoding / decoding unit 4 encodes this digital audio data. The encoded digital voice data is stored in the voice memory unit 6 including the index table via the memory control unit 5.

Also, during reproduction, the memory control section 5
The digital audio data read from the audio memory unit 6 via the is decoded by the encoding / decoding unit 4. The decoded digital audio data is converted into an analog audio signal by the D / A converter 8, amplified by the power amplifier 9, and output from the speaker 10.

Next, the operation when partial insertion or partial erasure is performed after recording a series of audio information will be described with reference to FIGS. 1 and 2 (a), 3 and 4 described above. Here, after recording a series of audio information, it is possible to automatically return to the recording start position and start the reproduction operation by the fast-reverse reproduction operation, or the user fast-reverses to an arbitrary position,
The reproduction operation may be performed from that point. FIG. 3 shows a case where the reproducing operation is started after returning to the recording start position.

First, the recording button (REC) is operated at the recording start position (for example, the position A in FIG. 3) to start the recording, and the recording is continued until the stop button (STOP) is operated at the position B, for example. Next, after operating the rewind button (REW) to return to the recording start position from the position where the recording was stopped, the reproducing operation is started (step S1). At this time, the address value corresponding to the recording start position (position A) written at the start of recording is set in the address counter 7 of FIG.
Next, in steps S2 and S3, it is determined whether or not the operator has selected the partial insertion or the partial deletion by pressing the partial insertion button or the partial deletion button during the reproducing operation. Until any one of the selection operations is performed, the reproduction operation is repeated while incrementing the value of the address counter 7 by 1 in step S5 unless the reproduction stop operation is performed in step S4.

When the partial insertion is selected in step S2, the reproducing operation is stopped and the process proceeds to step S7. At the time when the partial insertion is selected, for example, the value of the address counter 7 corresponding to the C position (address 2) is set. The data is written in the address table shown in FIG. In step S8, the value (end address + 1) of the address counter 7 written in the address table during the recording stop operation is set in the address counter 7, and the recording operation is started from the position C in FIG. This recording operation is repeated while incrementing the value of the address counter by 1 until a recording stop operation (for example, position D in FIG. 3) is performed or until the address indicating the end position of the voice memory unit 6 is reached (step S9, S
10, S11).

If it is determined in step S9 that the recording stop operation has been performed, the recording operation is stopped and the value of the address counter 7 corresponding to the D position (address 3).
Is written in the address table and the process is terminated (steps S12 and S13).

Further, in step S3, for example, when the partial erasing operation is selected at the position C in FIG. 3, as in the case of the partial insertion, the reproducing operation is continued as it is. At this time,
When the partial erase is selected, that is, the value of the address counter 7 corresponding to the C position (address 4) is written in the address table and the erase operation is started. This erase operation is performed until the erase stop operation is performed or the address indicating the end position of the voice memory unit 6 is reached.
Iterate while increasing the value of by 1 (step S1
7, S18, S19).

Then, in step S17, when the erase stop operation is performed at the position D in FIG. 3, the reproducing operation is stopped and the value of the address counter 7 corresponding to the position D (address 5), as in the case of partial insertion, for example. Is written in the address table (step S20). Note that steps S10 and S
In the case of YES in 18, the value of the address counter 7 at that time is written in the address table as the end address and the process ends (steps S14 and S15 and steps S22 and S23).

Therefore, according to the above-described partial insertion and partial erasing operations, an address table having the contents shown in FIG. 2A is created, and the system control unit 11 of FIG. With reference to, the value of the address counter 7 is controlled to execute the reproducing operation.

The operation of the IC recorder according to the present embodiment will be described below with reference to the flow charts of FIGS. 1, 2B and 5. In this embodiment, according to the recorded contents for each of a series of recorded audio information, it is selected whether or not data editing such as partial insertion or partial erasure is selected, and an attribute flag indicating the result is set, The operations of partial insertion and partial erasing are controlled according to the value of the flag.

Step ST1 shows a standby state for the next operation after the power is turned on or after the stop operation is completed. In step ST2, the start address is set in the address counter 7 according to the usage status of the voice memory unit 6. Here, the recording operation is started by the user operating the recording button (step ST3).

That is, the analog audio signal input from the microphone 1 and amplified by the microphone amplifier 2 is converted into digital audio data by the A / D converter 3 and sent to the encoding / decoding unit 4. The encoding / decoding unit 4 encodes the input voice signal in accordance with a control signal from the system control unit 11 and writes the encoded voice signal in the voice memory unit 6 via the memory control unit 5. At this time, in the index table, as shown in FIG.
Index data such as D number, recording date and time, recording time, etc. are written. Such a recording operation is repeated while incrementing the value of the address counter by 1 until a recording stop operation is performed or until the address indicating the end position of the voice memory unit 6 is reached (steps ST4, ST5,
ST6).

After a series of voice information is recorded in this way,
When the operator operates the recording stop button, the recording operation is stopped. Immediately after this, the operator operates the selection button of the operation input unit 12 to determine whether to prohibit the partial insertion or the partial erasure according to the recorded contents. Make a choice.

Next, in step ST9, the value of the address counter 7 when the recording operation is stopped is written as an end address in the index table (step ST9).
9). Then, in the next step ST10, an attribute as to whether or not the partial insertion and partial erasing operations for the series of voice information recorded in the recording operation is prohibited is set. That is, when the operator has selected to prohibit partial insertion and partial erasure, step ST10 is YES, and in this case, the attribute flag of the index table shown in FIG. Then, "1" is written (step ST12). On the other hand, when the operator does not select to prohibit partial insertion and partial erasure, step ST10
Is NO, and in this case, "0" is written in the attribute flag (step ST11).

Next, in step ST13, it is determined whether or not the fast reverse reproduction operation is performed. When the fast reverse reproduction operation is not performed, the process ends (step S14). When a fast-rewind playback operation is performed, the playback operation may be performed after automatically returning to the position of the start address described above, that is, the recording start position, or the user can fast-rewind to any position. You may make it reproduce | regenerate.

In this case, the digital audio data corresponding to the address value indicated by the address counter 7 is read from the audio memory unit 6 and sent to the encoding / decoding unit 4 via the memory control unit 5. The encoding / decoding unit 4 decodes the digital audio data input according to the control signal from the system control unit 11 and sends it to the D / A converter 8.
The signal input to the D / A converter 8 is converted into an analog audio signal, amplified by the power amplifier 9, and reproduced and output from the speaker 10. The content of the address counter 7 is set to 1 until the reproduction operation is a partial insertion operation, a partial deletion operation, a reproduction stop operation, or an address indicating the end position of the audio memory unit 6. It is repeated in increments of one (step ST1
5, ST16, ST17, ST18).

Then, if there is an instruction to stop the reproduction in step ST16, the process ends (step ST1).
9). When the address indicating the end position is reached in step ST17, the value of the address counter 7 is written as the end address in the index table of FIG. 2B and the process ends (steps ST20 and ST2).
1).

If there is an instruction for partial insertion or partial erasure in step ST15, the process proceeds to step ST22 and the value of the attribute flag shown in FIG. 2B is read. If the value of the attribute flag is "1", it is determined that partial insertion and partial erasure are prohibited, and the operation ends (step ST2).
4). If the value of the attribute flag is "0", it is determined that the partial insertion and partial erasure are permitted, and the partial insertion and partial erasure operations are executed until the partial insertion and partial erasure stop instructions are given (step ST23). , ST25). Details of this operation have already been described with reference to the flowchart of FIG.

If YES in ST5 and ST17, the value of the address counter 7 at that time is written as an end address in the index table and the process is terminated (steps ST7, ST8 and ST20, ST2).
1).

As described above, in this embodiment, in the audio recording apparatus for digitizing the audio signal and recording it in the semiconductor memory as the audio memory unit 6, after recording a series of audio information, for example, a series of audio information is recorded. Immediately after recording, or after recording a series of audio information and before the end address is recorded, a selection to select whether or not to prohibit editing of the series of audio information, that is, partial insertion and partial erasure. Means (selection button of the operation input section 12) and a prohibition data recording means for recording unchangeable predetermined prohibition data, for example, "1" in the semiconductor memory (index table in the above embodiment) when prohibiting editing. (System control unit 11).

Therefore, according to the audio recording apparatus of the above-mentioned embodiment, it is possible to select whether or not to prohibit the partial insertion and the partial deletion for each recorded series of audio information according to the recorded contents. Like In addition, once editing is prohibited, it cannot be changed to editable again, so that it is possible to prevent unauthorized tampering by a third party. further,
Since the attribute flag indicating whether or not partial insertion or partial erasure is prohibited is recorded in advance in the index table, it is possible to easily determine whether or not the recorded data can be edited.

In the above-described embodiment, the operator selects whether or not to prohibit the partial insertion and the partial deletion immediately after operating the recording stop button, but the present invention is not limited to this.
The above selection may be performed on already existing voice data. However, in this case, it is often the case that a long time has elapsed after recording a series of audio information, so when selecting the edit prohibition, make sure that the data has not been tampered with before selecting it. It is desirable to perform the operation.
Further, the present invention is not limited to partial erasing, and may be treated in the same manner as partial erasing when an operation of erasing a whole sentence is performed.

[0036]

As described above in detail, according to the audio recording apparatus of the present invention, it is possible to select whether or not to prohibit editing in accordance with the recorded contents for each of a series of recorded audio information. Like In addition, once editing is prohibited, it cannot be changed to editable again, so that it is possible to prevent unauthorized tampering by a third party.

[Brief description of drawings]

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

FIG. 2A is a diagram showing the contents of an address table, and FIG. 2B is a diagram showing the contents of an index table.

FIG. 3 is a diagram for explaining partial insertion and partial erasing operations.

FIG. 4 is a flowchart for explaining partial insertion and partial erasing operations.

FIG. 5 is a flowchart showing the operation of an embodiment of the audio recording device according to the present invention.

[Explanation of symbols]

1 ... Microphone, 2 ... Microphone amplifier, 3 ... A / D converter, 4
... code / decoder, 5 ... memory control unit, 6 ... audio memory unit, 7 ... address counter, 8 ... D / A converter, 9
... power amplifier, 10 ... speaker, 11 ... system control unit, 12 ... operation input unit.

Claims (1)

[Claims] 1. A voice recording device for digitizing a voice signal and recording the same in a semiconductor memory, and after selecting a series of voice information, selecting means for selecting whether or not to prohibit editing of the series of voice information. A voice recording apparatus comprising: a prohibition data recording unit that records unchangeable predetermined prohibition data in a semiconductor memory when editing is prohibited.