JP2003223191A - Voice activated sound recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voice activated sound recorder enabling easy confirmation of recorded contents even when recording is under way using the voice activated sound recorder. <P>SOLUTION: The voice activated sound recorder judges whether or not the level of input sound signals is higher than the prescribed level, and outputs only the input sound signals to be recorded by a recording medium to outside as monitoring signals. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice activated recording device, and more particularly to a voice activated recording device equipped with a recording monitor.

[0002]

2. Description of the Related Art Conventionally, when recording using a voice activated recording function, a monitor signal has been output both when recording and when recording is interrupted in a standby mode.

[0003]

However, when recording using the voice-activated recording function, the monitor signal is output when recording is being performed or when recording is interrupted in the standby mode. , It is not possible to determine the difference between the sound that has reached a certain level and is recorded, and the sound that has not reached a certain level and has not been recorded. There was a misunderstanding and a mistake, such as not having.

An object of the present invention is to provide a voice-activated recording device which can easily confirm the contents to be recorded even when recording using the voice-activated recording function.

[0005]

A voice-activated recording apparatus according to the present invention comprises a judgment means for judging whether or not an input sound signal is above a predetermined level, and the input sound signal of the above-mentioned input sound signal based on the judgment by the judgment means. It is characterized by comprising a recording means for recording on a recording medium and a monitor signal outputting means for outputting only an input audio signal recorded on the recording medium to the outside as a monitor signal.

Further, a judging means for judging whether or not the input audio signal is above a predetermined level, a recording means for recording the input audio signal on a recording medium based on the judgment of the judging means, and the above input. Voice activated recording comprising: monitor signal output means for outputting a voice signal as a monitor signal; and control means for controlling output of the monitor signal from the monitor signal output means based on the judgment of the judgment means. It is a device.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a voice activated recording apparatus according to a first embodiment of the present invention. First, in the voice activated recording device, each block will be described along the flow of signals. As shown in FIG. 1, the voice activated recording device of the present embodiment includes a microphone 1 that converts voice into an electric signal. Then, the audio signal is input to the preamplifier 2 and amplified. The control of the amplification factor of the preamplifier 2 or the power supply is controlled by the control circuit CPU 6 which controls the overall operation of the voice activated recording device.

The CPU 6 has a menu button (MENU) for setting various menus, a recording button (REC) for instructing recording start, a reproduction button (PLAY) for instructing reproduction start, a recording or Stop button (STOP) for instructing stop of playback processing, fast forward button (FF) for instructing fast forward operation or forward skip operation of file, fast rewind operation, or reverse skip operation of file Various operation buttons such as a rewind button (REW) for recording and a voice activation setting button (VCVA) for setting ON / OFF of voice activation recording are connected, and the CPU 6 determines the state of these operation buttons. Then, the operation control of each part based on it is performed.

Then, the audio signal amplified by the preamplifier 2 passes through an LPF (low pass filter) 3,
It is input to the A / D converter 4 that converts a voice signal that is an analog signal into a digital signal.

Subsequently, a digital signal processing unit (hereinafter referred to as DSP)
Abbreviated. ) 5 is transferred. In the DSP 5, the C
Under the control of the PU 6, the monitor output during recording can be started or stopped. Under the control of the CPU 6, the input digital audio signal is encoded (compressed and converted) frame by frame according to a predetermined format to generate encoded data. The encoded data thus generated is transferred to the recording medium 7 such as a memory card as an encoded data recording unit. The recording medium 7 is preferably composed of a semiconductor memory such as a flash memory having a card shape that can be attached to and detached from the main body of the voice activated recorder. Specifically, there are Smart Media (registered trademark),
The case where this is used in the present voice activated recording device will be described. Further, under the control of the CPU 6, the data is sequentially written in a predetermined address in the recording medium 7. The encoded data written in the recording medium 7 is handled as a file unit. Further, the recording of the voice in the voice activated recording device is performed in monaural.

Next, the function and the like of each block will be described along the signal flow when reproducing the encoded data recorded on the recording medium 7. First, the encoded data is sequentially transferred from the recording medium 7 to the DSP 5. The encoded data transferred to the DSP 5 is decoded (expansion-converted) into a digital audio signal in a predetermined frame unit under the control of the CPU 6.
The recording medium 7 can also record encoded data other than the DSS file. Therefore, in the DSP 5, for the encoded data sent from the recording medium 7,
It is determined which encoding method is used and the encoded data is decoded according to the encoding method. And
The decoded digital audio signal is sent to the D / A converter 8
Is sent to the amplifier 10 via the LPF 9 and is amplified there and output as sound from the speaker 11. It can also be amplified by another amplifier 12 and output from the earphone 13.

The CPU 6 includes a power control unit 14
The drive circuit 15 and the display unit 16 are connected to the C
It is controlled by PU6.

Next, FIG. 2 is a diagram showing a processing flow according to the embodiment of the present invention. First, as shown in FIG.
Initialization is performed at 10, and it is determined at S11 whether the stop button is pressed. If the stop button is pressed in S11, and if a processing operation such as recording or reproduction is being performed, those processings are stopped and the process proceeds to S12. If the stop button is not pressed in S11, the process directly proceeds to S12. In S12, it is determined whether the play button is pressed. If the play button is pressed in S12, the encoded data recorded in the recording medium 7 is reproduced, and the process proceeds to S13. If the play button is not pressed in S12, the process directly proceeds to S13. In S13, it is determined whether the record button is pressed. If the record button is pressed in S13, recording, which will be described later, is started, and the process proceeds to S14. If the record button is not pressed in S13, the process directly proceeds to S14. In S14, it is determined whether the fast-forward button is pressed. If the fast-forward button is pressed in S14, fast-forward is performed, and the process proceeds to S15. If the fast-forward button is not pressed in S14, the process directly proceeds to S15. In S15, it is determined whether the rewind button is pressed. If the rewind button is pressed in S15, rewind
Proceed to S16. If the rewind button is not pressed in S15, the process directly proceeds to S16. In S16, it is determined whether the menu button is pressed. If the menu button is pressed in S16, various operation settings such as clock setting, recording sound quality setting, start input voice signal level setting of voice start recording are performed, and if the menu button is not pressed, S1
Return to 1.

Next, FIG. 3 is a flow for explaining the processing at the time of recording. As shown in Figure 3, when recording starts,
In S20, it is determined whether voice activated recording is installed. When it is determined in S20 that the voice-activated recording is performed, the process proceeds to S23, and the input level of the input voice signal is determined. If the input audio signal does not reach the predetermined level in S23, the determination in S23 is repeated. If the level has reached the predetermined level in S23, the process proceeds to S24, and recording and monitor output of the input audio signal to be recorded are started. Next, in S25, the level is judged again. If the level is still above the predetermined value, the process returns to S25 and the judgment is repeated. If the input level drops below the predetermined level in S25, the flow advances to S26 to determine whether the state where the input level drops below the predetermined level has continued for 3 seconds. If it is 3 seconds or less, the process returns to S25, and the output of the recording monitor is continued. If 3 seconds or more has elapsed, the process proceeds to S27 to stop the recording and monitor output and enter the standby mode. Then S
Go to 28, determine whether the stop button is pressed,
When the stop button is not pressed, the process returns to S23. On the other hand, when the stop button is pressed, the process ends.
If it is determined in S20 that voice-activated recording is not set (during normal recording), the process proceeds to S21, and recording and monitor output of the input voice signal are started. And S22
Then, it is determined whether or not the stop button is pressed, and if the stop button is not pressed, the process returns to S21. On the other hand, if the stop button is pressed, the process ends.

Next, FIG. 4 is a block diagram for explaining the second embodiment of the present invention. The difference from the first embodiment is that a mute circuit 20 for starting and stopping monitor output during recording is provided. The mute circuit 20 is controlled by the CPU 21.

Next, FIG. 5 is a block diagram for explaining the third embodiment of the present invention. The difference from the first embodiment is that the amplifier 12 is controlled by the CPU 21,
The point is to start or stop the monitor output during recording.

Next, FIG. 6 is a block diagram for explaining the fourth embodiment of the present invention.

In the present embodiment, the input voice signal amplified by the amplifier 2 is A / D converted by the CPU 6 to directly read the input level of the input voice signal, and this is compared with a predetermined value to start voice activated recording. Then, the amplifier 12 is controlled so that only the data recorded by the voice activation recording is output as a monitor signal.

As described above, by using the embodiment of the present invention, when the voice-activated recording does not reach a certain level and the recording is not performed, the recording monitor output is controlled so that the monitor voice is not output. Therefore, it is possible to prevent misrecognition and mistakes of the user.

[0021]

By using the present invention, it is possible to easily confirm the contents to be recorded when recording is performed using the voice activated recording function.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a voice activated recording device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a processing flow according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating processing during recording according to the first embodiment of the present invention.

FIG. 4 is a block diagram according to a second embodiment of the present invention.

FIG. 5 is a block diagram according to a third embodiment of the present invention.

FIG. 6 is a block diagram according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Microphone, 2 ... Preamplifier, 2.10 ... Amplifier, 3 ...
LPF, 4 ... A / D converter, 5 ... Digital signal processing unit, 6 ... CPU, 7 ... Recording medium, 8 ... D / A converter, 11 ... Speaker, 12 ... Amplifier, 13 ... Earphone, 14 ... Power supply control unit, 15 ... Drive circuit, 16 ... Display unit, 20 ... Mute circuit, 21 ... CPU

Claims (2)

[Claims] 1. A judging means for judging whether or not an input audio signal is at a predetermined level or higher, a recording means for recording the input audio signal on a recording medium based on the judgment of the judging means, and the recording means. A voice-activated recording apparatus, comprising: a monitor signal output unit that outputs only an input voice signal recorded on a medium as a monitor signal to an external device. 2. Judgment means for judging whether or not the input audio signal is above a predetermined level, recording means for recording the input audio signal on a recording medium based on the judgment of the judgment means, and said input A voice start-up comprising: a monitor signal output means for outputting a sound signal as a monitor signal; and a control means for controlling the output of the monitor signal from the monitor signal output means based on the judgment of the judging means. Recording device.