JP4651261B2 - Data recording device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention converts audio or video continuously generated on a real time axis into digital data and writes it into a memory like an IC recorder for recording audio or a digital video camera for recording video. The present invention relates to a data recording apparatus that can
[0002]
[Prior art]
Conventionally, in an IC recorder, when a recording start button is pressed, an audio signal input from a microphone is converted into digital data, and then from a removable IC memory such as SmartMedia (registered trademark) or a multimedia card. Written to the external memory. If the recording end button is pressed, the recording operation is stopped.
In the IC recorder, the recorded data can be erased.
For example, when recording a conference, the user can write only a necessary portion of the conference in the external memory by alternately pressing a recording start button and a recording end button.
[0003]
[Problems to be solved by the invention]
In recording using a conventional IC recorder, it is difficult to press the recording start button exactly at the time point at which recording should be started. Therefore, as a safety measure, the recording start button is pressed early. .
However, if the recording start button is pressed too early, memory capacity is wasted due to the generation of useless recording portions. In order to erase the useless recording part, it is necessary to stop recording by pressing the recording end button, erase the recorded data, and then operate the recording start button again to resume recording. Therefore, the recording start timing may be lost during these operations.
[0004]
Accordingly, an object of the present invention is to provide a data recording apparatus capable of writing only necessary data in a memory by a simple operation.
[0005]
[Means for Solving the Problems]
A data recording apparatus according to a first aspect of the present invention is a data recording apparatus capable of converting voice or video continuously generated on a real time axis into digital data and writing it into a memory, and should be operated by a user When the first write start operation is accepted by the first and second start accepting means and the stop accepting means for accepting the first and second write start operations and the write stop operation, and in the predetermined recording area of the memory On the other hand, the first write control means for starting the writing of the digital data as the first data file and the second write start operation can be accepted by the second start accepting means after the writing of the digital data by the first write control means is started. When digital de which was written in a predetermined recording area of the memory from the time of reception of the first write start operation until the reception of the second write operation Performing a first process of disposing discards data, a second write control means for starting the writing of the digital data as the second digital data file for a given recording area of the memory, the writing of the digital data by the second write control means When the second writing start operation is received by the second start receiving means after the start of the recording, the digital written in the predetermined recording area of the memory from the time when the second writing start operation is received until the time when the third writing operation is received A third write control means for executing a second discard process for discarding the data and starting writing digital data as a third data file in a predetermined recording area of the memory; and a first write control means or a second write While the digital data is being written by the control means or the third write control means, the write stop operation is accepted by the stop acceptance means. If that is characterized in that it comprises a stop means allowed to stop writing of the digital data to the memory.
[0006]
A data recording apparatus according to a second invention is dependent on the first invention, and the first data file and the third data file are written in a memory with the same file name.
[0009]
【The invention's effect】
According to the data recording apparatus of the present invention, only necessary data can be written into the memory by a simple operation of operating the second write start operation means after the operation of the first write start operation means.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention implemented in an IC recorder will be specifically described with reference to the drawings. As shown in FIG. 1, the IC recorder comprises an operation button (10) to be operated by the user, a display (11) to display various information, and an external memory (9) that can be attached and detached. In response to the operation of the display (11), the recording operation for writing the sound collected by the microphone (1) to the external memory (9) as digital data, and reading the digital data written to the external memory (9) Thus, it is possible to perform a reproduction operation for emitting sound from the speaker (6).
[0011]
At the time of sound recording, the sound signal input from the microphone (1) is converted into digital data by the AD converter (2) and further encoded by the encoding / decoding IC (3), and then the control microcomputer (7). Then, the data is supplied to the memory control IC (8) and written to the external memory (9) by the memory control IC (8).
At the time of audio reproduction, digital data read from the external memory (9) by the memory control IC (8) is supplied to the encoding / decoding IC (3) through the control microcomputer (7), and the encoding / decoding is performed. After being decoded by the IC (3), it is converted into an analog audio signal by the DA converter (4), amplified by the amplifier (5), and then emitted from the speaker (6).
[0012]
In addition to the recording button that should be operated when starting recording, the operation button (10) interrupts the recording after the recording has been started once, discards the previous recording data, and resumes the recording. It includes a return button to be operated.
[0013]
FIG. 2 shows a recording control procedure to be executed by the control microcomputer 7 in accordance with the operation of the recording button and the return button.
First, in step S1, it is determined whether or not the recording button has been pressed. If the determination is yes, the process proceeds to step S2 to set a data write start address to the external memory and store the address in the internal memory. Remember. Here, the data write start address is set to the head address of the empty area where the data is erased in the data area of the external memory.
[0014]
Next, in step S3, it is determined whether or not the recording end button has been pressed. If it is determined NO, the process proceeds to step S4 to determine whether or not the return button has been pressed. Immediately after the recording button is pressed, it is determined NO in step S3 and step S4, thereby moving to step S5.
In step S5, it is determined whether or not the level of the sound to be recorded exceeds a predetermined value, that is, whether or not there is recorded data. If there is no recorded data (in the silent state), the process returns to step S3 and the same. Repeat judgment.
[0015]
If the recorded data exists, it is determined as YES in step S5, and the process proceeds to step S6. In step S6, the recording data is written according to the data write address to the external memory, and in step S7, the data write address is updated as the data writing progresses.
Thereafter, the process returns to step S3 and the recording data is repeatedly written until the recording end button is pressed.
[0016]
If the return button is pressed during recording and it is determined YES in step S4, the process proceeds to step S8, where the write start address is read from the internal memory, and in step S9, the data write address is set to the write start address. Return to.
If necessary, in step S10, the data written in the external memory from the time when the record button is operated until the time when the return button is operated is erased, and then the process returns to step S3 to resume the data writing.
Thereafter, when the recording end button is pressed and it is determined YES in step S3, the process proceeds to step S11, and writing of the recording data is ended.
[0017]
According to the IC recorder, the recording data is first written to the external memory by the operation of the recording button, and then the recording data writing to the external memory is interrupted by the operation of the return button. The written recording data is erased, and writing of the recording data is resumed with the same file name as the erased data.
Therefore, the user operates the return button one or more times to bring the recording start point by the return button operation as close as possible to the target recording start point, and writes only necessary data to the external memory. I can do it. Here, since unnecessary data written in the external memory from the time of the operation of the recording button to the time of the last operation of the return button is erased by overwriting, waste of memory capacity is avoided.
[0018]
In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim. For example, when the external memory (9) is of a type that cannot be erased by overwriting, the management information on the data to be erased is invalidated at the time of operating the return button, and the time is appropriate when the power is turned on. A configuration for erasing the data can be employed.
The data recording apparatus of the present invention can be implemented not only in audio equipment such as an IC recorder but also in video equipment such as a digital video camera.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an IC recorder according to the present invention.
FIG. 2 is a flowchart showing a recording control procedure of the IC recorder.
[Explanation of symbols]
(1) Microphone
(2) AD converter
(3) Encode / decode IC
(4) DA converter
(5) Amplifier
(6) Speaker
(7) Microcomputer for control
(8) Memory control IC
(9) External memory
(10) Operation buttons
(11) Display

Claims (2)

A data recording device capable of converting voice or video continuously generated on a real time axis into digital data and writing it into a memory,
A first and second start accepting means and a stop accepting means for accepting a first and second write start operation and a write stop operation to be operated by the user;
First writing control means for starting writing of digital data as a first data file to a predetermined recording area of the memory when the first writing start operation is received by the first start receiving means;
When the second write accepting operation is accepted by the second start accepting unit after the writing of the digital data by the first write control unit is started, the second write operation is started from the time when the first write start operation is accepted . A first discarding process for discarding the digital data written in the predetermined recording area of the memory by the time of acceptance is executed, and the digital data is written as a second digital data file in the predetermined recording area of the memory Second write control means for starting
When the second write start operation is accepted by the second start accepting unit after the second write control unit starts writing the digital data, the third write operation is started from the time when the second write start operation is accepted . Executing a second discarding process for discarding the digital data written in the predetermined recording area of the memory by the time of acceptance , and writing the digital data as a third data file in the predetermined recording area of the memory; Third write control means for starting
When a write stop operation is accepted by the stop accepting unit while the digital data is being written by the first write control unit, the second write control unit, or the third write control unit, the writing of the digital data to the memory is stopped. characterized in that it comprises a stop means, the data recording device.   2. The data recording apparatus according to claim 1, wherein the first data file and the third data file are written in the predetermined recording area of the memory as the same file name.

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