JP2593436B2 - Recording equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device, for example, a recording device suitable for recording image information and audio information in cooperation with an imaging device such as an electronic camera. It is.

[Prior art] An electronic camera or the like is known as this type of imaging device, but compared to a camera using a conventional silver halide photosensitive material,
Since an optical image is converted into an electric signal and recorded, it is easy to record sound from a subject at the same time.

[Problems to be Solved by the Invention] In the case of taking one frame of an image, in order to record sound for a certain period of time, it is necessary to display an indication to the subject side that the electronic camera is recording sound. It is also possible to send information such as the remaining recording time.

However, when attempting to display or transmit information by light, the subject must be constantly watching the imaging device, and the visible information sent from the camera must have complicated contents. Can not.

On the other hand, when information is sent using voice or the like, it is not necessary to watch the imaging device from the subject side, and the content of the information to be sent can be complicated, but the sound emitted from the imaging device is mixed with the sound to be recorded. There is a disadvantage that it will.

Therefore, the object of the present invention is
It is an object of the present invention to provide a recording device capable of emitting a notification sound such as an alarm sound to an operator.

[Means for Solving the Problems] In order to achieve the above object, a recording device according to the present invention includes a sound collecting unit that collects audible sounds, and an audible sound signal obtained from the sound collecting unit. Recording means, a notification sound generation means for generating a predetermined notification sound, the sound collection means being operated periodically plural times, and the notification sound generation means being operated periodically plural times, and the sound collection means And a control means for controlling the operation of the notification sound generating means so as to be alternately and repeatedly performed, so that the notification sound is not recorded during the sound collection operation.

[Operation] The audible sound signal is not output from the sound pickup means while the notification sound is being emitted.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. Here, a case will be described in which a single-frame imaging apparatus records audio for a certain period of time after pressing a release switch, and notifies the start and end of audio recording by sounds from the imaging apparatus.

In FIG. 1, reference numeral 1 denotes a release switch for activating image and sound imaging, sound collection, and recording operations.
Reference numeral 2 denotes a controller that controls the operation of the entire imaging apparatus, generates various control pulses in accordance with a reference clock signal sent from a clock generation circuit 3, and outputs signals to output terminals 2a, 2b, and 2
A pulse signal at an appropriate timing is supplied to each section of the image pickup apparatus via c, 2d, 2e, and 2f, and thereby the operation of each section is controlled.

Reference numeral 4 denotes an image sensor that converts a light image of a subject into an electric signal, and is composed of, for example, a CCD. Reference numeral 5 denotes a video signal processing circuit for processing an input video signal sent from the image sensor 4, and an output signal thereof is supplied to a video input terminal 13 a of a switch switching circuit 13.

Reference numeral 6 denotes a microphone for converting a sound from a subject into an electric signal.
Supplied to When the control pulse supplied to the control terminal 7c of the switch 7 is at a high level, conduction between the input terminal 7a and the output terminal 7b is established. When the control pulse supplied to the control terminal 7c is at a low level, the connection between the input terminal 7a and the output terminal 7b is non-conductive.

Reference numeral 8 denotes a low-pass filter, which removes unnecessary components mixed into the voice as described later, and supplies an output signal thereof to the voice signal processing circuit 9. The output signal of the audio signal processing circuit 9 is input to an audio input terminal 13b of the switch switching circuit 13.

A recording circuit 14 records an output signal transmitted from an output terminal 13d of the switch switching circuit 13.

When the control signal of the control terminal 13c is at a high level, the switch switching circuit 13 conducts between the input terminal 13a and the output terminal 13d. That is, the video signal transmitted from the video signal processing circuit 5 is passed, and the video recording mode is set. When the control signal of the control terminal 13c is at a low level, conduction between the input terminal 13b and the output terminal 13d is established. That is, the sound signal from the sound signal processing circuit 9 passes, and the sound recording mode is set.

Reference numeral 10 denotes a notification sound oscillator, 11 denotes a switch, and 12 denotes a speaker for a notification sound. The output signal of the oscillator 10 is connected to the input terminal 11a of the switch 11, and the output terminal 11b is connected to the speaker 12. In the switch 11, when the control terminal 11c is at a high level, the input terminal 11a and the output terminal 11c conduct, the notification sound signal from the oscillator 10 reaches the speaker 12, and is transmitted from the speaker 12 as the notification sound.

The output terminal 2a of the controller 2 is connected to the image sensor 4 and the video signal processing circuit 5, and the output terminal 2b is connected to the control terminal of the switch 7.
7c; the output terminal 2c is connected to the audio signal processing circuit 9;
Is the control terminal 11c of the switch 11, the output terminal 2e is the control terminal 13c of the switch switching circuit 13, and the output terminal 2f is the recording circuit 1.
4 respectively, and their operations are controlled by the output signal of the controller 2.

Next, the operation of the present embodiment will be described with reference to the timing charts shown in FIG. 2 and FIG.

First, as shown in FIG. 2 (A), when the time t ₁ pressing the release switch 1, in a state where the sound can be recorded from the second view a certain period of time T as shown in (B) subject. The control pulses delivered from the output terminal 2b of the controller 2 is composed of a time t ₁ and T period high level only.
Therefore, the input terminal 7a and the output terminal 7b of the switch 7 conduct, and the audio signal is taken into the audio processing circuit 9.

In response to the depression of the release switch 1, the image sensor 4 is exposed to an appropriate amount of light by a known exposure unit, and is converted into an electric signal. After a predetermined time T ₀ required as shown in FIG. 2 (C) has elapsed, the output terminal 2a of the controller 2
The video signal is read out from the image sensor 4 for the period T ₀ ′ by the control pulse obtained from, processed by the video signal processing circuit 5 and recorded. In this case, as shown in FIG. 2 (F), since the control pulse from the output terminal 2e of the controller 2 immediately after release _{T 3> (T 0 + T} 0 ') are as between high level period, the switch switching circuit The input signal of the 13 control terminal 13c is also at a high level during that time. Therefore, the input terminal
13a and the output terminal 13d conduct, and a video signal is recorded during the T ₀ 'period.

Audio signal in the period T is stored are taken once to the audio processing circuit 9 as described above, the time-base-compressed after a lapse of a time T, at time t ₅ after T _1, only T ₀ 'period The information is recorded in the recording circuit 14.

Since T ₃ <T, the control terminal 13c of the switch switching circuit 13 is at a low level at this time. Therefore, the input terminal 13b and the output terminal 13d conduct, and only the audio signal is recorded.

During T ₀ ′ at time t ₅ , a control pulse for voice recording is provided from the output terminal 2 f of the controller 2.

In the present embodiment, as shown in FIG. 2 (E), an audio recording start time t ₁ the release switch 1 is pressed,
The switch 11 is intermittently turned “ON” and “OFF” for a period of T _{2 from the} time t ₃ immediately before the end of the sound recording time t ₄ , thereby emitting a notification sound from the speaker 12 to the person on the subject side, thereby recording the sound. Signal the start and end of the game.

However, in this state, the notification sound is mixed with the sound to be recorded through the microphone 6.

Therefore, in the present embodiment, as described below, the sound from the speaker 12, that is, the notification sound is prevented from being mixed with the sound to be recorded.

Such a procedure will be described with reference to FIG. This figure shows the time
expanding the period T ₂ beginning from t ₁ or t ₃ is a timing chart showing.

FIG. 3 (A) is a waveform diagram of a control pulse arriving at the control terminal 11c of the switch 11, and FIG. 3 (B) is a waveform diagram of a control pulse arriving at the control terminal 7c of the switch 7. it is a reverse, during period T ₂ consists of a pulse having a time width of the period T ₁₁ occurring every period of time T _10.

As a result, the sound signal from the microphone 6 and the notification sound signal sent to the speaker 12 are alternately switched by the switch 7.
And from the switch 11. That is, as shown in FIG. 3 (C), the speaker 12 emits a notification sound only while the control pulse (see FIG. 2 (A)) is at a high level, thereby informing the subject of the start or stop of shooting. it can.

As shown in FIG. 3 (D), the microphone 6 picks up a sound in which the sound from the speaker is superimposed on the sound from the subject. Because of the conduction, the signal waveform flowing into the low-pass filter 8 is as shown in FIG.

Since the low-pass filter 8 removes the control pulse component, the output of the speaker is removed as shown in FIG. 3 (F). Is done.

[Effects of the Invention] As described above, according to the present invention, the sound collecting means is operated a plurality of times periodically, the notification sound generating means is operated a plurality of times periodically, and each operation of the sound collecting means and the notification sound are performed. Control means for controlling each operation of the generating means to be repeatedly performed with each other, so that the notification sound is not recorded during the sound collection operation, so that the notification sound for notifying a specific alarm state or the like is recorded. The voice recording can be continued without being mixed with the power voice.

In addition, it goes without saying that the content of the notification sound can be extended and used for the explanation of the operation of the imaging device and various warnings.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIGS. 2 (A) to (F) and FIGS. 3 (A) to (F) are timing charts for explaining the operation of this embodiment. DESCRIPTION OF SYMBOLS 1 ... Release switch, 2 ... Controller, 3 ... Clock generation circuit, 4 ... Image sensor, 5 ... Video signal processing circuit, 6 ... Microphone, 7 ... Switch, 8 ... Low pass filter, 9 ... ... Audio signal processing circuit, 10 ... Notification sound oscillator, 11 ... Switch, 12 ... Speaker, 13 ... Switch switching circuit, 14 ... Recording circuit, 2a, 2b, 2c, 2d, 2e, 2f ... Output Terminals, 13a, 13b, 7a, 11b ... input terminals, 13c, 7c, 11c ... control terminals, 13d, 7d, 11b ... output terminals.

Claims (1)

(57) [Claims] 1. A sound collecting means for collecting an audible sound; a recording means for recording an audible sound signal obtained from the sound collecting means; a notification sound generating means for generating a predetermined notification sound; Controlling the means to operate periodically a plurality of times, operating the notification sound generation means periodically and performing the operation of the sound collection means and the operation of the notification sound generation means alternately and repeatedly; A recording device, comprising: a control unit configured to perform control so that a notification sound is not recorded during a sound collection operation.