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JPS54122030

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DESCRIPTION JPS54122030
Description 1, title of the invention
Camera sound collector
3. Detailed description of the invention In this invention a television camera, or 8 mm or 16 mm
power! In particular, the present invention relates to a camera sound collecting apparatus
configured to photograph an object and collect sound from the object side in a camera provided
with a mechanism capable of making the angle of view 1-wise. For example, when shooting
sports, news reports, etc. with a portable camera and recording the sound with this, since it is
broadcasted not as a stereo sound but as a monaural sound as a conventional television
broadcast sound, 1 The sound generated from the subject side is collected by only the
microphones. However, when it is possible to record audio as a stereo sound and broadcast it in
stereo, it is desirable to broadcast a screen full of realism, that is, a screen and sound suited to
the real situation. According to the present invention, the image of the subject is recorded at the
same time as the sound is recorded as a three-dimensional sound from such a point, and when
necessary, the directivity of the microphone is wide in the case of wide angle of view, When
wide-angle stereo recording is performed for a wide range, the angle of view of the camera is
narrowed, and a portion formed like a spot is closely closed up, and recording is performed with
a microphone that directs directivity only to that portion It is an object of the present invention
to provide a camera sound collecting device which can According to the present invention, at
least a pair of directional microphones are attached to the camera having the angle of view
changing mechanism EndPage: One, and the angle of view adjustment position of the angle of
view changing mechanism is detected. The pointing angle is made to be the same direction and
directed to a wide angle to each other or controlled automatically. For example, in FIG. 1, it is
used to arrange in the magnetic recording and reproducing apparatus the sound collected at the
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same time as the image photographed by the portable television camera 11a. The angle of view
of this camera 116-t can be changed, and the angle of view can be expanded by rotating the
angle of view adjustment ring 12 in the front lens portion, or a portion of a narrow point is
narrowed. Can be photographed. In the present invention, a pair of microphones 13.14 are
attached to the camera 110 body rotatably in a horizontal plane with the directivity directed
toward the object side of the so-camera. In the example &, two pivot shafts 15.16 are attached to
the main body of the camera 11, and the directional microphones 13.14 are attached to these
axes 15.16. A gear 17 connected to the shaft of the motor is connected to one of the shafts 15
and the gear 17 attached to the shaft is engaged with the gear 18 attached to the shaft 16 and
interlocked in opposite directions with the shafts 16 by rotation of the shaft 15導 く These
microphones 13.14i The part opposite to the lens side of the camera projects from the shaft
15.16 in order to guide the collected electric signal to the recording device side with a cable It is
considered as a connector with a cable.
Therefore, the microphones 13 and 14 may be slightly offset in the vertical direction with
respect to the axis 15.16 so that the angles of the microphones 13.14 can be extended to an
angle of 180 degrees from each other as far as possible. .14 is attached. An electric signal
corresponding to the angle of view adjustment position of the angle of view adjustment
mechanism of the camera is generated. For example, as shown in FIG. 3, the mover of variable
resistance: aP 21 is rotated by the angle of view W4 adjusting ring 12, and both ends of the
variable resistor 21 are connected to the battery 22. On the other hand, the mover of the variable
resistor 24 is moved by the motor 23 whose rotation shaft is attached to the shaft 15 to which
the microphone 13 is attached, and this variable resistor 24 is connected to both ends of the
battery 25. The outputs of the movers of these variable resistors 21 and 24 are input to the
comparison circuit 26 and the difference is detected and communicated to the switch 27 to be
supplied to the motor drive circuit 28, whereby the motor 23 is rotated and the motor The
rotation of 23 controls the variable resistor 24 so that both inputs of the comparison circuit 26
coincide. The motor 23 is rotated corresponding to the angle of view adjustment position, so that
the angular position of the microphone 13.14 is changed corresponding to the angle of view of
the camera. This is so that the microphones 13.14 are parallel in a narrowed state with the angle
of view, that is, the pointing directions coincide, and the pointing directions of the microphones
13.14 point in 66 minutes when the subject of the camera 11 has narrowed. A wide range of
sound that matches the full view of the direction in which the camera 11 is facing, the camera 11
f It is made to collect sound separately from the left and right as the center. A portion 29
containing a mechanism for detecting the angle of view side alignment shown in FIG. 3 is
provided near the angle of view adjusting ring 12, and the motor 23 and the portion for driving
the same are the main body of the camera 11. It mounts in the accommodating part 31 provided
in the attachment part of axis | shaft 15.16. Furthermore, the microphone set at that time
regardless of the angle of view adjustment by turning off the switch 27 inserted between the
comparison circuit 26 and the drive circuit 24 with the angle of the microphone 13.14 set at an
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arbitrary position as necessary. It is also possible to hold the angle formed by 13 ° 14. As
described above, according to the sound collecting apparatus for a camera according to the
present invention, when the angle of view of the camera is adjusted to w4, the angle formed by
the pointing direction of the microphone 13.14 changes, so that a wide panoramic view is
photographed. In the case where the angle made by the microphone 13.14 is broadened, a wide
range of sound can be collected, and when taking a picture of a certain part and closing up, only
the sound from the close-up part The pointing direction of the microphone 13.14 is directed to
collect sound.
This happens automatically. Therefore, when shooting a news or shooting sports, the camera is
shooting-the 7 sound from the microphone EndPage: The sound played by the microphone is
automatically highlighted according to the screen the camera is trying to capture Are collected
Therefore, more realistic coverage is performed. The two microphones 13.14 may be recorded
on another channel of the recorder or may be recorded on one channel in a superimposed
manner. The camera 11 is not limited to a portable camera for a video tape recorder, and may be
a camera for a photographic film, and in some cases it may be a camera for fixation as well as a
camera for portable. The television camera includes not only a broadcast television camera but
also an industrial television camera. For example, as shown in FIG. 4, a microphone 32.33
directed to the side opposite to the lens portion of the camera 11 may be attached to the camera
body so that the sound on the rear side can also be collected. In this case, when the pointing
direction of the front microphone 13.14 is the same direction, the pointing angle is expanded to
the microphone 32 ° 33 from the rear, and the pointing angle of the front microphones is
widened. It is also possible to reversely control so as to narrow the angle formed by the pointing
direction of the rear microphone 32.33. In the above description, the microphones 13.14 are
provided on different axes, but may be provided on the same axis and rotated in opposite
directions.
4. Brief description of the drawings The first mark is a side view showing an example of a sound
collecting apparatus for a camera according to the present invention, FIG. 2 is a plan view
showing a pivot mechanism portion of the microphone, and FIG. It is a block diagram which
shows an example for linking rotation of a mechanism and a microphone, and is a top view which
shows the example which attached the directional microphone which turned to back to FIG. 11:
Camera, 12: Ring for opening angle of view 13 ° 14 two microphones, 23; Motor, 26:
Comparison circuit. Patent Applicant Nippon Television Broadcasting Network Inc. EndPage: 3
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