JP2004021050A - Data recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To write only necessary data in a memory by a simple operation. <P>SOLUTION: A data recorder has an operation button 10 which can convert a voice signal into digital data, write it in an external memory 9 and includes a recording button and a return button and a microcomputer 7 for control which controls writing of recording data in the external memory 9 according to an operation of the operation button 10. The microcomputer 7 for control starts the writing of recording data in the external memory 9 according to an operation of the recording button, interrupts the writing of recording data in the external memory 9 according to an operation of the return button after that and restarts the writing of recording data on canceling the recording data written in the external memory 9 so far. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is to convert audio or video continuously generated on a real time axis into digital data and write it to a memory, such as an IC recorder for recording audio or a digital video camera for recording video. The present invention relates to a data recording device capable of performing the following.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an IC recorder, after a sound signal input from a microphone is converted into digital data by pressing a recording start button, a sound is input from a removable IC memory such as a smart media (registered trademark) or a multimedia card. Written to an external memory. If the recording end button is pressed, the recording operation stops.
Further, in an IC recorder, it is possible to delete recorded data.
For example, in recording a conference, the user can write only the necessary portion of the conference into the external memory by alternately pressing the recording start button and the 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 point in time when recording is to be started. Therefore, the recording start button is pressed early as a safety measure. .
However, if the recording start button is pressed too early, a wasteful recording portion is generated, which wastes memory capacity. In order to delete the useless recording part, it is necessary to interrupt the recording by pressing the recording end button, delete the recorded data, and then operate the recording start button again to restart the recording Therefore, during these operations, there is a risk that the timing of starting the recording may be missed.
[0004]
Therefore, an object of the present invention is to provide a data recording device capable of writing only necessary data to a memory by a simple operation.
[0005]
[Means for solving the problem]
The data recording apparatus according to the present invention comprises: first and second writing start operation means to be operated by a user; and data writing control means for controlling writing of digital data to a memory in accordance with the operation of the two writing start operation means. It has.
The data writing control means starts writing digital data to the memory in response to the operation of the first writing start operation means, and suspends the writing of digital data to the memory in response to the subsequent operation of the second writing start operation means Then, after the digital data written to the memory is discarded, the writing of the digital data is restarted.
Here, the digital data is discarded by erasing the data to be discarded or invalidating the management information on the data to be discarded.
[0006]
In the recording of digital data using the data recording device of the present invention, first, the first write start operating means is operated to start writing digital data to the memory. If the write start timing is too early, the second write start operating means is operated. As a result, the writing of the digital data to the memory is interrupted, the digital data written to the memory up to that point is discarded, and the writing of the digital data is restarted. At this time, new data is written with the same file name as the discarded data.
Therefore, by performing the operation of the second write start operation means once or more times, the last write start operation time can be made as close as possible to the target write start time. Here, useless digital data written in the memory from the first operation of the first write start operation unit to the last operation of the second write start operation unit is discarded, and waste of the memory capacity is avoided.
[0007]
In a specific configuration, the data writing control means includes a data erasing means for erasing digital data written in a memory from a time when the first writing start operation means is operated to a time when the second writing start operation means is operated. I have. The data erasing means is for erasing digital data to be erased by invalidating the data management information, or for erasing digital data to be erased by overwriting new digital data.
[0008]
Further, in a specific configuration, the data write control means includes:
Storage means for storing a digital data write start address at that time in response to an operation of the first write start operation means;
A write start address updating means for reading an address stored in the storage means in response to an operation of the second write start operation means and updating the write start address with the read address.
Therefore, the operation of the second write start operation means can return the write start address of the digital data to the original address set by the operation of the first write start operation means.
[0009]
【The invention's effect】
According to the data recording device of the present invention, only the necessary data can be written to the memory by a simple operation of operating the second write start operating means after operating the first write start operating means.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to an IC recorder will be specifically described with reference to the drawings. As shown in FIG. 1, the IC recorder includes operation buttons (10) to be operated by a user, a display (11) for displaying various information, and a detachable external memory (9). A recording operation of writing sound collected by the microphone (1) as digital data to the external memory (9) in accordance with an operation of the display (11), and reading digital data written to the external memory (9). Thus, a reproducing operation of emitting sound as sound from the speaker (6) is possible.
[0011]
At the time of voice recording, a voice signal input from a microphone (1) is converted into digital data by an AD converter (2) and further encoded by an encode / decode IC (3), and then a control microcomputer (7) Is supplied to the memory control IC (8) via the memory control IC (8), and is 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 encode / decode IC (3) via the control microcomputer (7), and the encode / decode 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 emitted from the speaker (6).
[0012]
The operation button (10) includes, in addition to the recording button to be operated when recording is started, the recording is temporarily stopped, the recording is interrupted, the recorded data is discarded, and the recording is resumed. It includes a return button to be operated when performing.
[0013]
FIG. 2 shows a recording control procedure to be executed by the control microcomputer 7 in response to the operation of the recording button and the return button.
First, it is determined in step S1 whether or not the recording button has been pressed. If the determination is affirmative, the process proceeds to step S2, where a write start address of data to the external memory is set, and the address is stored in the internal memory. Remember. Here, the data write start address is set to the head address of a free area from which data has been 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 the determination is NO, the process proceeds to step S4, and it is determined whether or not the return button has been pressed. Immediately after the recording button is pressed, it is determined NO in steps S3 and S4, and the process shifts 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. Repeat the decision.
[0015]
If the recording data exists, the determination in step S5 is YES, 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 write progresses.
Thereafter, returning to step S3, writing of the recording data is repeated until the recording end button is pressed.
[0016]
If the return button is pressed during recording and the answer is YES in step S4, the process proceeds to step S8 to read the write start address from the internal memory. In step S9, the data write address is changed to the write start address. I will return to.
Then, if necessary, in step S10, after the data written in the external memory is erased from the time when the record button is operated until the time when the return button is operated, the process returns to step S3 to restart the data writing.
Thereafter, when the recording end button is depressed and the answer is YES in step S3, the process proceeds to step S11, and the writing of the recording data is ended.
[0017]
According to the IC recorder, first, the recording button is operated to start writing the recording data to the external memory, and then the return button is operated to interrupt the writing of the recording data to the external memory. After the written recording data is deleted, the writing of the recording data is restarted with the same file name as the deleted data.
Therefore, the user performs the operation of the return button once to a plurality of times so that the recording start time by the operation of the return button is made as close as possible to the target recording start time, and writes only necessary data to the external memory. I can do it. Here, useless data written to the external memory from the time when the recording button is operated to the time when the return button is operated last is erased by overwriting, so that waste of memory capacity is avoided.
[0018]
The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, when the external memory (9) is of a type in which data cannot be erased by overwriting, the management information on the data to be erased is invalidated when the return button is operated, and timely operation such as when the power is turned on is performed. A configuration for erasing the data can be adopted.
Further, the data recording apparatus of the present invention is not limited to audio equipment such as an IC recorder, but can be applied to 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) Control microcomputer (8) Memory control IC
(9) External memory (10) Operation buttons (11) Display

Claims (5)

What is claimed is: 1. A data recording device capable of converting audio or video continuously generated on a real time axis into digital data and writing the digital data into a memory, comprising: first and second writing start operation means to be operated by a user; Data write control means for controlling the writing of digital data to the memory in response to the operation of the two write start operation means, wherein the data write control means controls the digital write to the memory in response to the operation of the first write start operation means. Data writing is started, the writing of digital data to the memory is interrupted in accordance with the subsequent operation of the second writing start operating means, and the digital data written to the memory up to that time is discarded. A data recording device for restarting writing. 2. The data writing control means includes data erasing means for erasing digital data written in the memory from when the first writing start operation means is operated to when the second writing start operation means is operated. A data recording device according to claim 1. 3. The data recording apparatus according to claim 2, wherein the data erasing unit erases the digital data to be erased by invalidating the data management information. 3. The data recording apparatus according to claim 2, wherein the data erasing means erases the digital data to be erased by overwriting new digital data. The data writing control means includes:
Storage means for storing a digital data write start address at that time in response to an operation of the first write start operation means;
5. The write start address updating means according to claim 4, further comprising: a write start address updating means for reading an address stored in said storage means in accordance with an operation of said second write start operation means, and updating a write start address with said address. Data recording device.

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