JPH04192797

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DESCRIPTION JPH04192797
[0001]
(A) Industrial Application Field The present invention relates to an acquisition device 6] such as a
camera integrated type VTR. (B) Conventional technology The current camera-integrated VTR
acquisition system has one or two microphones, one can record in monaural and two in stereo. It
has become. However, since many of these microbons are omnidirectional, when recording is
performed, convexes and voices in the vicinity other than the place where recording is performed
are also recorded in the same manner. Also, when recording while zooming in on a specific
person, the video will be zoom recorded, but the audio will be the same as before <3, the audio
around the area where you are drawing L will be put together It was an acquisition method. The
recording board was the same in both cases, even if recording was performed with zoom in and
zoom out as in the following. (C) Problem to be solved by the invention -1- As described above,
since the current camera / body type VTR does not control the directivity of the microphone
which is the acquisition device, even if zoom recording is performed. There is a problem that the
method of acquiring audio is the same as that of standard recording, and unnecessary voices in
the vicinity of the place where recording is performed are input when zooming in. (D) Means for
Solving the Problems The present invention is intended to solve the above-mentioned problems,
and it is an object of the present invention to provide a device 1 for collecting audio such as a
camera integrated VTR etc. A microphone, a second micro-pong with wide directivity, sensitivity
adjustment means for changing and combining the recording sensitivities of the first and second
micro-bons, and means for detecting the lens movement amount of the zoom mechanism
According to the output of the means, the sensitivity adjustment means narrows the directivity at
the time of zooming in and widens the directivity at the time of zooming out according to the
output of the means. (E) Operation By having the configuration as described in 2 , the
directivity of the microphone can be controlled in accordance with the amount of movement of
the zoom mechanism (lens) of the camera. (End) Embodiment Next, the acquisition apparatus of
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the present invention will be described below with reference to FIG. In this embodiment, as a
microphone for recording of a camera integrated type VTR, a microphone having a difference in
directivity between two scales of a narrow directivity microphone 1 and a wide directivity
microphone 2 is removed, and 5: The directivity is controlled by lowering the '+' sensitivity todepending on the movement amount (position) of the camera lens 3. The lens 3 is driven by a
motor 6 through a gear 4.5. A potentiometer 7 is attached to the motor 6 to detect the amount of
movement of the lens 3.
Specifically, the amount of movement is output as a pulse by the potentiometer 7, and the pulse
number is converted into a pulse number circuit 8 to output the position of the lens 6 as a
numerical value. Next, based on this position data, the microphone sensitivity adjustment circuit
9 controls the directivity by lowering the recording sensitivities of the two types of microphones
1.2 to match the position of the camera lens. It is The recording sensitivity of the microphone 1.2
of the monthly balance 111 is controlled by directivity control corresponding to the position of
the camera lens as shown in FIG. It is Accordingly, when the zoom-in is performed by this
acquisition mechanism, the sensitivity of the narrow directional microphone 1 can be reduced,
and the directivity can be narrowed by lowering the sensitivity of the wide directional
microphone 2. In addition, the sensitivity can be reduced by decreasing the sensitivity of the
narrow directional microphone] during standard recording by zooming out, and the directivity
can be broadened by decreasing the sensitivity of the wide directional microphone 2 by one. (1.
Effect of the Invention) According to the present invention, since the voice of the place related to
the zoom recording can be zoom-recorded by the narrow directional microphone at the time of
zoom-in, it is extremely useful when used in a camera integrated type VTR.
[0002]
Brief description of the drawings
[0003]
Fig. 1 is a schematic block diagram of the camera integrated VTR according to the present
invention, and Fig. 2 is a person showing the relationship between the position of the camera
lens and the sensitivity of the two microphones, ν diagram = 4-(1) Narrow directional
microphone (first microphone), (2) Wide directional microphone (second microphone), (3)
Camera lens, (9) Microphone sensitivity adjustment circuit (sensitivity adjustment means).
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