JPH07271400A - Audio data recorder - Google Patents

Abstract

PURPOSE:To provide an audio data recorder which only records audio data that are to be recorded without an omission and effectively utilizes a semiconductor memory. CONSTITUTION:Audio data which are recorded in a prescribed time period between the present and the past are temporarily recorded in a buffer memory 7. When a recording button is pushed, the audio data in the number of button memory corresponding to the number of pushing are transferred to a semiconductor memory 8 and after that, a real recording is initiated.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, when trying to record the contents of a meeting, for example, the recording is often started at the same time as the meeting starts and continues to be recorded until the meeting ends. However, the recorded voice data and the like also include data of silent sections, and the voice data that is actually desired to be reproduced is often a part of the recorded voice data, resulting in waste of the recording medium. .

Therefore, a voice activation type voice data recording device has been devised which starts recording only when the input voice signal is higher than a preset level. However, such a voice-activated voice data recording device is not recorded because the amplitude level of the voice is low, especially when the first voice at startup starts with a consonant such as a plosive sound or a fricative sound, It had the drawback of causing so-called headaches.

Further, in the conventional voice data recording apparatus, when a certain sound is desired to be recorded, it is difficult to start the recording start operation with respect to the rising of the sound, and the head part is cut off or the silent part is lengthened. there were.

In order to solve such a drawback, Japanese Laid-Open Patent Publication No. 4-134799 discloses that voice data is cut off at the time of voice activation by encoding the data including data traced back by the number of stages of the buffer and storing it in the memory. A method of eliminating is disclosed.

Further, in Japanese Patent Laid-Open No. 63-282999, pre-recording is performed at the start of recording, and main recording is performed at the start of trigger recording, whereby a head break at the start of recording and a wasteful non-recording portion occur. It discloses how to prevent it.

[0007]

However, in both of the above-mentioned two prior arts, it is necessary to set in advance by a switch or the like how much the audio data should be recorded backward from the present.

The audio data recording apparatus of the present invention has been made in view of such a problem, and the purpose thereof is to set the capacity to be stored, which is traced back from the present, at the same time as recording and according to the situation. Accordingly, it is an object of the present invention to provide an audio data recording device capable of recording only a target audio without omission and efficiently using the main recording unit.

[0009]

In order to achieve the above object, a voice data recording apparatus according to a first aspect of the present invention preliminarily records voice data from a time point when a predetermined time goes back to the present time to the present time. Operation of the recording section, the recording mode setting operation member, and the main recording section that records at least audio data input from that point by the recording mode setting operation of the recording mode setting operation member, and the recording mode setting operation member Control means for controlling the storage capacity of the audio data recorded in the preliminary recording section, which is traced back from the present time.

In the audio data recording apparatus according to the second invention, the audio data recording apparatus according to the first invention transfers the audio data relating to the capacity to be stored from the preliminary recording section to the main recording section, and thereafter. The audio data input to is recorded in the main recording unit.

The audio data recording apparatus according to a third aspect of the present invention is the audio data recording apparatus according to the first aspect of the present invention, in which the audio data relating to the capacity to be saved among the audio data recorded in the preliminary recording section is recorded. Address management.

[0012]

That is, the audio data recording apparatus according to the first aspect of the present invention preliminarily records the audio data from the time point when a predetermined time goes back from the present time to the present time in the auxiliary recording unit, and sets the recording mode setting operation method. Accordingly, the preliminarily recorded voice data is recorded in the main recording unit while controlling the capacity to be stored which is traced back from the present.

In addition to the operation of the audio data recording device according to the first aspect of the invention, the audio data recording device according to the second aspect of the invention stores audio data concerning the capacity to be saved from the preliminary recording part to the main recording part. Audio data that is transferred and then input is recorded in the main recording unit.

In addition to the function of the audio data recording device according to the first aspect of the invention, the audio data recording device according to the third aspect of the invention has a storage capacity of the audio data recorded in the preliminary recording section. The address of the voice data is managed.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a diagram showing the configuration of an audio data recording / reproducing apparatus to which this embodiment is applied. In the figure, the microphone 1 includes a microphone amplifier 2, a low-pass filter 3, and A
It is connected to one end of the encoding / decoding circuit 5 via the / D converter 4. The speaker 13 is the power amplifier 1
2, connected to one end of the encoding / decoding circuit 5 via the low-pass filter 11 and the D / A converter 10. The other end of the encoding / decoding circuit 5 is connected via a memory control circuit 6 to a buffer memory 7 composed of a first buffer to a tenth buffer, and this buffer memory 7 is connected to a semiconductor memory 8. Here, the buffer memory 7 and the semiconductor memory 8 are ROM, SRAM, DRAM or the like.

The system control section 9 for controlling the operation of each section includes an encoding / decoding circuit 5, a memory control circuit 6,
In addition to the buffer memory 7 and the semiconductor memory 8, an operation input unit 11 having operation buttons for recording, stopping, fast-forwarding, etc., and a display unit 10 are connected.

In the above structure, the audio analog signal input from the microphone 1 when the operator performs a recording operation via the operation input unit 11 is amplified by the microphone amplifier 2, and the low-pass filter 3 out of the audio signal components. Unnecessary high frequency components are blocked. The output signal from the low pass filter 3 is converted into a digital signal by the A / D converter 4. The encoding / decoding circuit 5 encodes this digital signal and outputs encoded data. This encoded data is recorded in the buffer memory 7 or the semiconductor memory 8 via the memory control circuit 6.

When the operator performs a reproduction operation via the operation input unit 11, the encoded data recorded in the semiconductor memory 8 is read out by the control operation of the memory control circuit 6 and encoded / decoded. It is input to the digitizing circuit 5 and is decoded by a decoding method corresponding to the encoding method at the time of recording operation. The signal restored by this decoding is D / A
It is input to the converter 10 and converted into an analog signal. This analog signal is amplified by the power amplifier 12 through the low-pass filter 11 and then output from the speaker 13 as reproduced sound.

The operation of the audio data recording / reproducing apparatus according to the first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. When the power of this device is turned on, recording is started and voice information is input from the microphone 1. At the same time, the data in the buffer memory 7 as the preliminary recording section is shifted one stage at a time (step S1). That is, the data in the first buffer is shifted to the second buffer, the data in the second buffer is shifted to the third buffer, and the same shift operation is performed up to the tenth buffer. The data in the buffer 10 before the shift is discarded.

By this shift operation, the voice data input from the microphone 1 is first recorded in the first buffer of the buffer memory 7 (step S2), and then shifted to the second buffer and the third buffer to be stored in the tenth buffer. It will be rejected after it arrives. Therefore, assuming that the audio data recorded in each buffer is one second worth of audio data,
In the buffer memory 7, the audio data from the present to 10 seconds before is always recorded while being shifted every second.

During such a recording operation, it is determined whether the key input by the operator is the record button (step S3), and the above recording operation is performed unless the record button is pressed. Then, when the record button is pressed, it is determined how many times the key has been input, and the number of buffers corresponding to this number is set as the memory effective number, which is traced back from the time of pressing (step S4). Data from the first buffer to the effective number of effective buffers are transferred and recorded in the semiconductor memory 8 as a main recording unit (step S5). As a result, past sounds are recorded in the semiconductor memory 8 the number of times the recording button is pressed from the present.

After that, the recording operation in real time is started (step S6). During this recording operation, it is determined whether the key input by the operator is the stop button (step S7),
The recording operation is continued unless the stop button is pressed. When the stop button is pressed, the recording operation is stopped and the operation after step S1 is executed again (step S
8).

According to the above-described first embodiment, the amount of audio data to be recorded retroactively can be set at the same time as recording according to the situation, so that only the desired audio data is not lost. , And the semiconductor memory 8 can be efficiently used. Also,
Since the voice data at the time of actual recording is recorded immediately after the semiconductor memory region in which the voice data of the effective memory is recorded, the recording region can be used without waste.

The second embodiment of the present invention will be described below with reference to the flowchart of FIG. In the second embodiment, the buffer memory 7 provided separately from the semiconductor memory 8 is not used as in the first embodiment, but a part of the semiconductor memory 8 is used as a buffer area as shown in FIG. , The audio data input before the record button is pressed is recorded while performing the shift operation as described above. Here, it is assumed that the buffer area has the same configuration as that of the first embodiment.

First, when the power supply of this device is turned on, recording is started and voice information is input from the microphone 1. At the same time, the data in the buffer area as the preliminary recording section is shifted one stage at a time (step 19). That is, the data in the first buffer is shifted to the second buffer, the data in the second buffer is shifted to the third buffer, and the same shift operation is performed up to the tenth buffer. The data in the buffer 10 before the shift is discarded.

By this shift operation, the voice data input from the microphone 1 is first recorded in the first buffer of the buffer area (step S20), then the second buffer and the third buffer.
After being shifted with the buffer and reaching the tenth buffer, it is rejected. Therefore, assuming that the audio data recorded in each buffer is one second worth of audio data, the audio data from the present to 10 seconds ago is always recorded while being shifted every second in the buffer area. become.

During such a recording operation, it is determined whether the key input by the operator is the record button (step S21), and the above recording operation is performed unless the record button is pressed. Then, when the record button is pressed, it is determined how many times the key input has been made, and the number of buffers corresponding to this number is set as the effective memory number retroactively from the time of pressing (step S22). . Next, as shown in FIG. 4, the address value at the point where the effective number is returned by using the first buffer as the end address (abcd) is set as the effective start address (wxyz) from this address to the end address (abcd). Voice data is stored (step S
23).

As a result, the past voices are recorded in the semiconductor memory 8 the number of times the recording button is pressed from the present. Next, the address next to the end address (abcd) of the buffer area is set as the address of the actual recording start (step S24).

After that, the recording operation in real time is started (step S25). During this recording operation, it is determined whether the key input by the operator is the stop button (step S2).
6) The recording operation is continued unless the stop button is pressed. Then, when the stop button is pressed, the recording operation is stopped and the operations after step S19 are executed again (step S27). By the above recording operation, the audio data is recorded as valid data in the semiconductor memory area shown by the diagonal lines in FIG.

According to the second embodiment described above, the amount of voice data to be recorded retroactively can be set according to the situation at the time of recording, so that only the target voice data is not lost. Can be recorded. Further, since the unnecessary data portion in the buffer area (the blank portion of the buffer area in FIG. 4) can be used for re-recording, the semiconductor memory 8 can be efficiently used as in the first embodiment.
Further, in the second embodiment, since the address is managed, there is an advantage that a delay due to the transfer of voice data does not occur.

In the first and second embodiments described above, the display unit 10 is composed of display elements such as LCD and LED, and the effective number of memory of the buffer memory 7 or effective recording time corresponding to this effective number, or The amount proportional to the effective recording time can be displayed by numbers or bar graphs. Therefore, the operator can visually recognize these numerical values and quantities.

Further, in the above-mentioned first and second embodiments,
Although the number of times the record button is pressed is the effective memory number, the number of effective memories is not limited to this, and the effective memory number may be determined based on the time during which the record button is pressed. That is, the longer the recording button is pressed, the larger the number of effective memories becomes.

Further, although the semiconductor memory 8 is used as a recording medium in this embodiment, the present invention is not limited to this, and a magnetic disk, a magnetic tape or the like may be used. As described above, the audio data recording apparatus according to the present embodiment includes the preliminary recording unit (buffer memory 7) for preliminary recording of the audio data from the time point traced back to the present time, and the recording mode setting operation member (operation). The recording button of the input unit 11), the main recording unit (semiconductor memory 8) for recording at least audio data input from that point by the recording mode setting operation member, and the operation method of the recording mode setting operation member ( For example, a control unit (system control unit) that controls the storage capacity of the audio data recorded in the preliminary recording unit, which is to be saved, in accordance with the operation of pressing the record button a predetermined number of times or the operation of pressing the record button for a predetermined time. 9) and. Here, since the capacity to be stored, that is, the valid voice data of the memory can be determined by the operation of the record button, the voice data that does not need to be stored (the unnecessary data of the buffer memory 7 and the buffer of FIG. 4). The blank area data of the area) may be recorded at the same time.

Further, the audio data recording apparatus of this embodiment is
Audio data relating to the capacity to be stored is transferred from the preliminary recording unit (buffer memory 7) to the main recording unit (semiconductor memory 8), and the audio data input thereafter is recorded in the main recording unit.

Further, the audio data recording apparatus of this embodiment is
Among the audio data recorded in the preliminary recording unit (buffer area in FIG. 4), the audio data relating to the capacity to be stored (hatched area in the buffer area in FIG. 4) is address-managed.

The technical idea of the following constitution is derived from the above-mentioned specific embodiment, and the following effects are obtained.
The first configuration of the audio data recording device of the present invention is, at least, a preliminary recording unit for recording audio data from the time point traced back to the present time, a recording mode setting operation member, and a recording mode setting operation member. Depending on how to operate the main recording unit that records the audio data that is input at least from that point on the operation member and the operation member for recording mode setting,
And a control means for controlling the capacity of the audio data recorded in the preliminary recording section, which is to be stored retroactively from the present. In this case, only the target audio data can be recorded without being lost, and the main recording section can be efficiently used.

The second aspect of the audio data recording apparatus of the present invention
In the configuration, in addition to the first configuration, after the audio data relating to the capacity to be stored is transferred from the preliminary recording unit to the main recording unit, the audio data input thereafter is recorded in the main recording unit. In this case, in addition to the effect of the first configuration, the main recording section can be used without waste.

The third embodiment of the audio data recording device of the present invention.
In addition to the first configuration, this configuration manages the address of the audio data related to the capacity to be stored among the audio data recorded in the preliminary recording unit. In this case, in addition to the effect of the first configuration, there is an effect that a delay due to the transfer of audio data does not occur.

The fourth aspect of the audio data recording apparatus of the present invention.
In addition to the configuration of any one of the first, second, and third configurations, this configuration controls the storage capacity of the prerecorded audio data according to the operation time of the recording mode setting operation member. In this case, in addition to the effect of any of the first, second, and third configurations, there is an effect that the capacity to be stored can be controlled by only one operation.

The fifth aspect of the voice data recording apparatus of the present invention
In addition to the configuration of any one of the first, second, and third configurations, the configuration of (1) controls the capacity of preliminarily recorded audio data to be stored by the number of times of operation of the recording mode setting operation member. In this case, in addition to the effect of any of the first, second, and third configurations, the capacity to be stored can be controlled without being affected by the operation time.

A sixth aspect of the voice data recording apparatus of the present invention.
In addition to the configuration of any one of the first to fifth configurations, the configuration of (1) has means for displaying the capacity of the preliminarily recorded audio data to be stored. In this case, in addition to the effect of any of the first to fifth configurations, the operator can visually recognize the capacity to be saved.

The seventh aspect of the audio data recording apparatus of the present invention.
In addition to the configuration of any one of the first to fifth configurations, the configuration of (1) has means for displaying an effective number of buffer memories, an effective recording time corresponding to this effective number, or an amount proportional to the effective recording time. . In this case, the operator can visually recognize these numerical values and quantities.

[0043]

According to the first aspect of the present invention, it is possible to record only the target audio data without any loss and to effectively use the main recording section. Play.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, there is an effect that the main recording portion can be used without waste. Further, claim 3
According to the invention described in (1), in addition to the effect of the invention described in (1), there is an effect that a delay due to transfer of audio data does not occur.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an audio data recording device according to the present invention.

FIG. 2 is a flowchart showing the operation of the first embodiment of the present invention.
It is

FIG. 3 is a flow chart showing the operation of the second embodiment of the present invention.
It is

FIG. 4 is a diagram showing a data structure of a semiconductor memory according to a second embodiment after recording.

[Explanation of symbols]

1 ... Microphone, 2 ... Microphone amplifier, 3 ... Low pass filter, 4 ... A / D converter, 5 ... Encoding / decoding circuit, 6 ...
Memory control circuit, 7 ... Buffer memory, 8 ... Semiconductor memory, 9 ... System control unit, 10 ... Display unit, 11 ... Operation input unit, 12 ... Power amplifier, 13 ... Speaker.

Claims (3)

[Claims] 1. A preparatory recording section for preliminarily recording audio data from a time point when a predetermined time goes back from the present to the present, a recording mode setting operation member, and a recording mode setting operation of the recording mode setting operation member, At least, depending on how the main recording unit that records the audio data that is input from that point in time and how the recording mode setting operation members are operated, set the storage capacity of the audio data that was recorded in the preliminary recording unit that should be traced back from the present An audio data recording device comprising: a control unit for controlling. 2. The audio data recording device according to claim 1, wherein the audio data relating to the capacity to be stored is transferred from the preliminary recording section to the main recording section, and the audio data inputted thereafter is recorded in the main recording section. 3. The audio data recording device according to claim 1, wherein, of the audio data recorded in the preliminary recording section, the audio data relating to the capacity to be stored is address-managed.