JPS6269783A - Image pickup device - Google Patents

Abstract

PURPOSE:To prevent the output of the audible sound during the informing sound by providing a means to absorb the audible sound, a means to record the audible sound and a means to generate the prescribed informing sound and energizing alternately the sound absorbing means and the informing sound generating means. CONSTITUTION:When a releasing switch 1 is depressed to a time point t1, the control pulse sent from a controller 2 comes to be the high level for a T period only, a switch 7 is conducted and the sound signal is fetched into a sound processing circuit 9. In response to the depressing of the switch 1, an image pickup element 4 is exposed, after a time T0, an image signal is read for a T0' period and through an image signal processing circuit 5, recorded. The sound signal fetched into the circuit 9, after a time T passes, is compressed by the time base and recorded to a recording circuit 14 for a T0 period only. The control pulse to arrive at a switch 11 and the switch 7 is respectively reverse in polarity, and therefore, the sound signal from a microphone 6 and the informing sound signal sent to a speaker 12 are alternately sent. Consequently, the informing sound will not be mixed into the sound to be recorded through the microphone 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an imaging device, and particularly to an imaging device configured to record not only an image but also the audio accompanying the image. The invention relates to an imaging device.

[Conventional technology j This type of imaging device is known as 'lti: sub camera, but conventional silver n! Compared to cameras using photosensitive materials, since the optical image is converted and recorded at electrical zero, it is easy to record H'f etc. from the subject at the same time.

[Problem to be solved by the invention Electricity 1 When taking a single frame of an image, in order to record the sound for a certain period of time, it is necessary to point the electric camera toward the subject while recording the voice from the camera side. It is also possible to send information such as an indication of a certain event or the remaining recording time.

However, if these displays and information are to be transmitted using light, the subject must constantly look at the imaging device, and the visible information sent from the camera must also be complex. I can't.

On the other hand, when information is sent using voice, etc., there is no need for the subject to watch the imaging device, and the content of the information to be sent can be complicated. It has the disadvantage of being

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an imaging device configured so that even when various notification sounds are transmitted from the imaging device side, those notification sounds do not mix with the sweat to be recorded and become noise. It's about doing.

[Means for solving the problem J In the present invention, a sound collection means for collecting sound "r Ia!ff",
a recording means for recording video signals and audible signals obtained from the L stage; and a notification sound generation stage for generating a predetermined notification sound; The means is configured to energize copulation.

[Effect 1 Heading report] Prevent the i+r listening 1'f signal from being output from the pickup dr-T and stage while the ding is being issued.

[Example] An example of the present invention will be described in detail below with reference to five drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

Here, we will explain the case where - in a frame-by-frame imaging device, audio is recorded for a certain period of time after the release switch is pressed, and the start and end times of audio recording are notified by 11 from the imaging device. .

In FIG. 1, l is a release switch for starting image and sound imaging, sound collection, and recording operations. 2
2 is a controller that controls the operation of the entire image pickup apparatus, and generates various control buses (Ly) according to the reference clock signal sent from the clock generation circuit 3, and outputs the output terminal 2a.
, 2b, 2c, 2d, 2e and 2f, supplying a pulse signal t) at an appropriate timing to each part of the imaging device,
This controls the operation of each part.

4 is an imaging boat that converts the optical image of the subject into an electric signal 5).
r゛, and consists of, for example, CCO. 5 is
This is a video signal processing circuit that processes an input video signal sent from the image sensor 4, and its output signal is supplied to the video input terminal 13a of the switch changeover circuit 13.

6 is a microphone that converts the sound from the subject into an electrical signal, and its output signal is sent to the input terminal 7a of the switch 7.
supplied to When the control pulse supplied to the control u4 terminal 7c of the switch 7 is at a high level, conduction occurs between the input terminal 7a and the output terminal 7b. In addition, control terminal 7
When the control pulse supplied to c is at a low level, there is no communication between the input terminal 7d and the output terminal 7b.

8 is a low-pass filter, which removes unnecessary components mixed into the voice as described later, and supplies its output signal to the sound-1 signal processing circuit 9. fr, the output signal of the voice signal processing circuit 9 is controlled by a switch. 77 voice input terminal 13b of circuit 13
is man-powered.

14 is a recording circuit, which records the output signal sent from the output terminal +3d of the switch changeover circuit 13.

In the switch shift imitation circuit 13, when the control signal at the control terminal 11c is at a high level, conduction occurs between the input terminal 13a and the output terminal 13d. That is, the video signal sent out from the video signal processing circuit 5 is passed through.

The camera enters video recording mode. Further, when the control signal t) of the control terminal -13c is at a low level, conduction occurs between the input terminal 13b and the output terminal T'-13d. That is, the audio signal from the audio signal processing circuit 9 passes through, and the mode is set to audio recording mode.

lO is 'dJ signal °f oscillator, 1! is 7,000, 12
The output signal of the six oscillator IO, which is the speaker for the notification stream, 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 1-11c is at a high level, the input terminal 11
a and output terminal -11c are electrically connected, and the oscillator! The signal "-" from 0 reaches the speaker 12, and is sent out from the speaker 12 as a notification tone.

The output terminal 2d of the controller 2 is connected to the image sensor 4 and the video signal processing circuit 5, the output terminal 2b is connected to the control terminal 7C of the switch 7, the output terminal 2C is connected to the audio signal processing circuit 8, and the output terminal 2d is connected to the control terminal of the switch 11. ie, the output terminal 2e is connected to the control terminal 13c of the switch switching circuit 13, and the output terminal 2'' is connected to the recording circuit 14, and their operations are controlled by the output signal of the controller 2.

Next, the operation of this embodiment will be explained with reference to timing charts shown in FIGS. 2 and 3.

First, as shown in FIG. 2(A), at time 1. When the release switch 1 is pressed, the camera enters a state in which the sound from the subject can be recorded for a certain period of time T, as shown in FIG. 2(B). At this time, the control pulse sent from the output terminal 2b of the controller 2 is at a high level for a period T from time tl. Therefore, the input terminal 7d of the switch 7 and the output terminal 7
b becomes conductive, and audio 0 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 means and converted into an electrical signal. As shown in Figure 2 (C), the required fixed time is ↑. After , the output terminal of controller 2)2
A video signal is read from the image sensor /-4 for a period To' by the control pulse obtained from a, and is processed and recorded by the video signal processing circuit 5. In this case, as shown in FIG. 2(F), Since the control pulse from the output terminal 2e of the controller 2 is at a high level for the period 73>(To + To') immediately after the release, the input rising of the control terminal/-13c of the switch switching circuit 13 is also at a high level during that period. becomes. Therefore, the input end 1'-13a and the output end 1/-
13d becomes conductive and the image 0 is recorded during the 1-o' period.

The audio signal within the period T is I-rY as mentioned above.
-11 is accumulated in the processing circuit 9 and stored, and 1 o'clock lf
After f1 T has elapsed, the time axis is compressed, and at time t5 after Tj, only the period To' is recorded in the recording circuit 14.

Since Tj<T, the control terminal 13c of the switch switching circuit 13 is at a low level at this point.

Therefore, the input terminal +3b and the output terminal f13d are electrically connected, and only the voice signal is recorded.

At time point 7r, during the period To', a control pulse for voice recording is applied from the output terminal 2f of the controller 2.

In this embodiment, as shown in FIG. 2(E), from the sound recording start time t1 when the release switch 1 is pressed and the time t3 just before the sound recording end time t4, T7
The switch 11 is intermittently turned "on" and "off" for a certain period of time, thereby emitting a notification sound from the speaker 12 to the person on the subject side, thereby informing the person of the start and end of audio recording.

However, if this continues, the NJ FY will be mixed in with the audio that is being recorded through the microphone 6.

Therefore, in this embodiment, as described below, the sound 4, that is, the notification sound from the speaker 12 is prevented from being mixed with the audio to be recorded.

This procedure will be explained using FIG. 3. This figure shows time t
1 or t3 is an enlarged timing chart showing a period 〒2 starting from t3.

FIG. 3(A) is a waveform diagram of the control pulse arriving at the control terminal lie of the switch 11, and FIG. 3(B) is a waveform diagram of the control pulse arriving at the control terminal f-7c of the switch 7.
Although the polarities are opposite to each other, they are composed of pulses having a time width of a period of 1, which are generated every cycle of one period T1° during the T2 period.

As a result, the i'y+'' signal from the microphone 6 and the notification signal sent to the speaker 12 are sent out from the switch 7 and the switch 11 during copulation.

That is, as shown in FIG. 3(C), the speaker 12 emits a notification sound only when the control pulse (see FIG. 2(A)) is at a high level, thereby notifying the subject of the start or stop of shooting F. I can do it.

The microphone C collects a waveform in which the sound from the subject is combined with the sound from the speaker, as shown in FIG. 3 (0). Therefore, the signal waveform flowing into the low-pass filter 8 is as shown in FIG. 3(E), with the signal f4J'f'i removed.

Since the low-pass filter 8 removes this control pulse component, the output of the speaker is removed as shown in FIG. be done.

[Effects of the Invention] As described below, according to the present invention, it is possible to prevent the notification sound emitted from the imaging device from mixing with the audio to be recorded. It becomes possible to notify the operator of various information such as recording and termination of audio signals.

Furthermore, it goes without saying that the content of this notification sound can be expanded and used for explaining the operation of the photographing device and for various warnings.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIGS. 2(A)-(F) and FIGS. 3(A)-(F) are timing charts explaining the operation of this embodiment. DESCRIPTION OF SYMBOLS 1... Release switch, 2... Controller, 3... Claw 2 generation circuit, 4... Image sensor. 5... Video signal processing circuit, 8... Microphone, 7... Switch, 8... Low pass filter, 9... RF voice doubler signal processing circuit 10... Notification sound oscillator, 1z... switch, 12... speaker, 13... switch switching circuit, 14... recording circuit, 2a, 2b, 2c, 2d, 2e, 2f - output terminal,
13a, 13b, 7a, 1 lb...-input terminal, 13c, 7c, 1lc-... control terminal. 13d, 7d, 11b...output terminals.

Claims (1)

[Scope of Claims] 1) Sound collection means for collecting audible sound; Recording means for recording a video signal and the audible sound signal obtained from the sound collection means; and notification sound generation for generating a predetermined notification sound. An imaging device comprising means for alternately energizing the sound collection means and the notification sound generation means. 2) The notification sound is generated in synchronization with a pulse train having a narrow time width, and when the pulse train is generated, the operation of the sound collecting means is stopped. The imaging device described.