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JPH05161045

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DESCRIPTION JPH05161045
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
camera integrated type magnetic recording apparatus, and more particularly to a camera
integrated type magnetic recording apparatus for reducing driving noise from a main body.
[0002]
2. Description of the Related Art A conventional camera-integrated type VTR has a problem that
the microphone picks up the driving sound of the camera at the time of AF (auto focus) or
zooming. In order to solve this conventional problem, noise is eliminated as a configuration in
which a filter of the same frequency characteristic (noise frequency band) is disposed at all
outputs of a single or a plurality of microphone elements.
[0003]
As described above, in the above-described conventional example, since the frequency band of
noise is removed, other sounds present in the same frequency band are also removed, and as a
result, as a whole. There was a problem that it became an unnatural sound.
[0004]
The present invention has been made to solve the problems as described above, and by
combining sound collecting means having different frequency characteristics and directivity,
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1
noise is prevented without attenuating other sounds in the noise frequency band. The only
purpose is to get rid of effectively.
[0005]
Therefore, according to claim 1 of the present invention, there is provided means for reducing
driving noise from the main body input from the microphone, and a plurality of sound collecting
means having different directivity are provided. Further, the present invention aims to achieve
the above object by a camera-integrated type magnetic recording apparatus in which the sound
collecting means have different frequency characteristics.
[0006]
According to a second aspect of the present invention, there is provided a first sound collection
means having a sharp directivity that handles noise frequency bands, and a second sound
collection means that has broad directivity that covers frequency bands other than the noise
frequency bands. The above object is achieved by the camera-integrated magnetic recording
apparatus according to claim 1 comprising:
[0007]
In the camera-integrated type magnetic recording apparatus according to claim 1 of the present
invention, the directivity of the plurality of sound collecting means is different, and each has
different frequency characteristics, so that the driving noise from the main body input from the
microphone Reduce
[0008]
In the camera-integrated type magnetic recording apparatus according to claim 2 of the present
invention, the first sound collection means having a sharp directivity receives the noise frequency
band, and the second sound collection means having a broad directivity is other than the noise
frequency band. It handles the frequency band and reduces the driving noise from the main unit
input from the microphone.
[0009]
Two embodiments of the present invention will be described below with reference to the
drawings.
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First, a first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a block diagram of a microphone unit of a camera-integrated magnetic recording
apparatus according to a first embodiment of the present invention.
[0010]
In FIG. 1, A is a first sound collecting means, and is a sharp means of directivity composed of the
element 1 and having a noise frequency band.
B is a second sound collecting means, and is a means of a broad directivity which is constituted
by the element 2 and which covers frequency bands other than the sound collecting frequency
band.
Further, 3 is an adder for adding the outputs of element 1 and element 2.
[0011]
Next, the operation of the first embodiment will be described with reference to FIG.
In FIG. 1, an element (microphone element) 1 has a sharp directivity and receives a noise
frequency band, and an element (microphone element) 2 has a wide directivity and receives a
frequency band other than the noise frequency. Because the output of the element 1 and the
output of the element 2 are added and input from the microphone, only the driving noise of the
main body can be reduced.
[0012]
Next, a second embodiment of the present invention will be described with reference to FIG.
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FIG. 2 is a block diagram of a microphone of a camera-integrated magnetic recording apparatus
according to a second embodiment of the present invention.
[0013]
In FIG. 2, 1 and 2 are elements having the same frequency characteristics, 1 is a sharp directional
element, and 2 is a wide directional element. Also, 4 is a filter that passes only the noise
frequency band, 5 is a filter that attenuates only the noise frequency band, 3 is an adder that
adds the outputs of the filter 4 and the filter 5.
[0014]
Next, the operation of the second embodiment will be described with reference to FIG. In FIG. 2,
elements 1 and 2 both have the same frequency characteristic, and the output from sharp
directivity of element 1 is allowed to pass through only the noise frequency band by filter 4 and
the output from broad directivity of element 2 is filtered Only the frequency band of noise is
attenuated by the unit 5 and the output from each of the filters 4 and 5 is added by the adder 3
to reduce only the driving noise of the main body input from the microphone.
[0015]
As can be understood from each of the embodiments described above, a plurality of sound
collecting means having different directivity are provided, and the sound collecting means are
provided with different frequency characteristics to drive noise from the main body input from
the microphone. It can be reduced.
[0016]
As described above, according to the present invention, by combining sound collecting means
having different frequency characteristics and directivity, only noise is effectively removed
without attenuating other sounds in the noise frequency band. Can.
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