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JPH11298777

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DESCRIPTION JPH11298777
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
television camera and a still camera capable of incorporating or attaching a microphone for
sound collection.
[0002]
2. Description of the Related Art The prior art will be described with reference to FIG.
[0003]
1 is a camera such as a video camera or an electronic still camera, 2 is a lens, 3 is a microphone
whose directivity can be changed, 4 is a directivity variable circuit of the microphone 4.
[0004]
As described above, the camera 1 incorporates the lens 2 capable of changing the focal length
and the directivity changing circuit 4.
The microphones 3 are electrically separated from the lens control system (not shown), and even
when the focal length of the lens 2 whose focal length can be changed is changed, the directivity
variable circuit 4 is interlocked with this. Works and the directivity does not change.
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[0005]
Conversely, when the directivity variable circuit 4 is operated to change the directivity, the focal
length 2 of the lens does not change.
[0006]
The above-mentioned prior art has the disadvantage that it is difficult to accurately collect the
sound emitted from the target being imaged by the television camera, as the focal length of the
lens changes. There is.
Furthermore, when the directivity of the microphone is changed, the focus of the lens does not
change, and the focus of the lens must be changed according to the change of the directivity of
the microphone.
[0007]
In order to solve such a drawback, the present invention aims to change the directivity of the
microphone in response to changes in the focal length of the lens, and to accurately collect the
sound emitted from the target.
[0008]
Another object of the present invention is to respond to changes in the directivity of the
microphone, to change the focal length of the lens, and to accurately capture the target that is
collecting sound.
[0009]
SUMMARY OF THE INVENTION In order to achieve such an object, the present invention
provides:
When the focal length of the lens changes, the directivity of the microphone for sound collection
is also interlocked with this, and it is possible to accurately collect sound of the target imaged by
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2
the camera by changing it.
[0010]
That is, when the focal length of the lens is increased, the directivity of the microphone is made
acute.
When the focal length is shortened, the directivity of the microphone is obtuse.
[0011]
2.
When the directivity of the sound collection microphone is changed according to the object to be
collected, the focal length of the lens is also interlocked with this to be changed, so that a clear
image of the target imaged by the camera is obtained. You can get it.
[0012]
DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a block diagram showing the entire
configuration of the present invention.
[0013]
In the figure, 11 is a camera such as a video camera or an electronic still camera, 2 is a lens
whose focal length can be changed, and has a function of outputting the focal length and an
input for externally controlling the focal length.
3 is a microphone controlled by the directivity variable circuit 4 and 4 is a directivity variable
circuit which can change directivity, and has a function of outputting a directivity state and an
input for controlling the directivity from the outside. Have. A drive unit 5 operates the lens 2 and
the directivity changing circuit 4 and has an output for operating the directivity changing circuit,
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3
and an input (not shown) for receiving each state.
[0014]
ある。 The focal length of the lens 2 is detected by the drive unit 5 and the directivity variable
circuit 4 is operated to change the directivity of the microphone according to the change of the
focal length of the lens.
[0015]
Conversely, the drive unit 5 detects the directivity from the directivity variable circuit 4 and
changes the focal length of the lens 2.
[0016]
The operation will be described below.
[0017]
When the focal length of the lens changes, the drive unit that detects the change outputs a signal
for changing the directivity.
The directivity changing circuit that has received the signal changes the directivity, so that it is
possible to collect the target imaged by the camera and not to collect the sound emitted from
other than the target.
When the directivity of the microphone changes, the drive unit detects the change and outputs a
signal that changes the focal length of the lens. The lens that receives the signal changes the
focal length, so that it is possible to capture an object that emits a sound with the camera.
[0018]
For example, a focal length change signal is sent to the drive unit 5 from the lens 2 which can
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4
change the focal length. The drive unit 5 outputs an operation signal to the directivity changing
circuit 4 so as to change the directivity according to the change signal of the focal distance. The
directivity changing circuit 4 that has received the operation signal changes the directivity. As a
result, the microphone 3 can accurately collect only the sound of the target imaged by the
camera 1. The opposite operation is also possible, and when the directivity of the microphone 3
is changed by the directivity changing circuit 4, a directivity change signal is sent to the drive
unit 5, and according to the signal, the signal for changing the focal distance to the lens 2 is It is
input. As a result, the focal length of the lens matches the target to be collected by the
microphone 3, and the camera 1 can accurately capture an image.
[0019]
As described above, according to the present invention, Even when the focal length of the lens
changes, the directivity of the microphone for sound collection is also linked, so that accurate
sound collection of the target imaged by the camera becomes possible. Furthermore, 2. Even
when the directivity of the sound collection microphone is changed according to the sound
collection object, the focal length of the lens is also linked, so it is possible to obtain a clear image
of the target imaged by the camera in a short time Can.
[0020]
According to the present invention, it is possible to collect sound of a target photographed by a
camera and to eliminate noise and the like.
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