close

Вход

Забыли?

вход по аккаунту

?

JP2005341073

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2005341073
PROBLEM TO BE SOLVED: To provide a microphone attached to photographing equipment such
as a video camera, for example, to prevent a photographer's voice such as narration from being
louder than the sound of other channels, and to collect sounds by separating each channel To
provide a microphone that can SOLUTION: Directional microphone units 11 to 15 corresponding
to five channels of a front left channel FL, a front right channel FR, a rear left channel RL, a rear
center channel RC, and a rear right channel RR are provided, and a rear center channel (RC) The
outputs of the directional microphone unit 15 are separated into two at equal volume, and the
signals are added to the output signals of the directional microphone units 11 and 12 by the
adders 25L and 25R, and the subtractor 26L, 26 R subtracts from each output signal of the
directional microphone units 13 and 14. [Selected figure] Figure 3
マイクロホン
[0001]
The present invention is a four-channel or multi-channel recording attached to a video camera,
including a sound source at the rear center (such as a photographer) as a narration, and a onepoint four-channel microphone or The present invention relates to a one-point multi-channel
microphone, and also relates to a four-channel one-point microphone used for the purpose of
creating a multi-channel sound source by creating a central back channel from the recorded four
channels.
[0002]
10-05-2019
1
Conventionally, in a four-channel microphone that records sound signals corresponding to four
channels of front left channel, front right channel, rear left channel, and rear right channel, for
example, as described in Patent Document 1 below, four channels are used. It has been proposed
to obtain surround audio signals.
Unexamined-Japanese-Patent No. 5-191887 gazette
[0003]
A conventional 4-channel microphone or multi-channel microphone attached to a video camera
will record the voice of the photographer most heavily. In addition, when connected to a recorder
or the like equipped with auto gain control, the voice of the photographer activates the auto gain
control, and the recorded voice becomes smaller as a whole.
[0004]
Also, in order to extract the voice of the photographer as a sound for narration from the sound
source recorded by a conventional four-channel microphone attached to a video camera etc., the
sound was recorded by a virtual narration microphone unit To be extracted.
[0005]
In order to extract the voice of the photographer, it is necessary to provide and record a
dedicated microphone unit corresponding to the rear center channel to the conventional fourchannel microphone.
[0006]
In addition, the voice of the photographer (sound recorded by the microphone unit in the rear
center channel) should be reduced in volume so as not to be too loud compared to the sound
recorded by the other channels.
In addition, the voice of the photographer must prevent the recorder's auto gain control from
working excessively.
10-05-2019
2
[0007]
The present invention has been made in view of the above points, and its object is, for example, a
microphone attached to photographing equipment such as a video camera, wherein the voice of a
photographer such as narration is too loud than the sound of other channels. It is an object of the
present invention to provide a microphone which can pick up and pick up the separation
between each channel.
[0008]
The microphone according to the present invention for solving the above problems includes a
directional microphone unit corresponding to five channels of front left channel, front right
channel, rear left channel, rear center channel, and rear right channel, and the five channels. And
a four-channel signal circuit for generating and outputting a four-channel sound signal from an
output signal of the directional microphone unit.
[0009]
Also, the sound collection level of the directional center microphone unit of the rear center
channel is set lower than the sound collection level of each directional microphone unit of the
front left channel, front right channel, rear left channel and rear right channel. It is characterized
by
[0010]
The four-channel signal circuit is a circuit that adds the output signal of the directional
microphone unit of the rear center channel to the output signal of the directional microphone
unit of the front left channel and the front right channel, the rear left channel and the rear. It is
characterized by having a circuit for subtracting the output signal of the rear center channel
from the output signal of the directional microphone unit of the right channel.
[0011]
The four-channel signal circuit further includes a circuit for adding the output signal of the
directional microphone unit of the rear center channel to the output signal of the directional
microphone unit of the rear left channel and the rear right channel, the front left channel and the
front. It is characterized by having a circuit for subtracting the output signal of the rear center
channel from the output signal of the directional microphone unit of the right channel.
[0012]
10-05-2019
3
In addition, the directional central microphone unit of the rear center channel is detachable so
that it can be used at a distance from the directional microphone unit corresponding to each
channel of the front left channel, front right channel, rear left channel and rear right channel. It is
characterized by being configured.
[0013]
Furthermore, in the present invention, means for disabling the circuit for subtracting the output
signal of the directional microphone unit of the rear center channel when using the directional
microphone unit of the rear center channel in the separated position, for example, a changeover
switch Have.
[0014]
(1) According to the present invention, since the microphone units corresponding to the five
channels each use a directional microphone unit, the degree of separation of each channel is
sufficiently ensured.
In particular, since the camera is equipped with a rear center channel directional microphone
unit for narration in consideration for the photographer to input narration sound, clear sound
can be recorded.
[0015]
In addition, the sound collection level of the directional microphone unit of the rear center
channel is set lower than the sound collection levels of the directional microphone units of the
front left channel, front right channel, rear left channel, and rear right channel. Therefore, the
voice of the photographer prevents the automatic gain control of the connected recorder from
operating excessively.
[0016]
In addition, since the output signal of the directional microphone unit in the rear center channel
in which the voice of the photographer is recorded is added to the sound signal in the front left
and right channels or the sound signal in the rear left and right channels, By extracting the inphase component from the sound signal of the front left, right channel or rear left, right channel
recorded and output by the microphone, the rear center sound for multichannel (that is, the
narrator sound source of the photographer) is easily extracted And can be reproduced.
10-05-2019
4
[0017]
In addition, the directional microphone unit of the rear center channel can be detached so that it
can be used at a distance from the directional microphone unit corresponding to each of the
front left channel, front right channel, rear left channel, and rear right channel. Since the
configuration is made, the convenience is significantly improved.
[0018]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
FIG. 1 shows the appearance of an embodiment in which the present invention is applied to a
video camcorder capable of recording video and audio.
In FIG. 1, a four-channel microphone 20 having five directional microphone units 11 to 15 is
attached to a main body 10 of the video camcorder.
[0019]
The directional microphone unit 11 is disposed near the front left 45 degrees when the front of
the camera is at 0 degrees, and records the sound source (FL) of the front left channel.
[0020]
The directional microphone unit 12 is disposed near the front 45 degrees to the right of the
camera, and records the sound source (FR) of the front right channel.
[0021]
The directional microphone unit 13 is disposed toward the vicinity of 135 degrees from the front
to the left of the camera, and records the sound source (RL) of the rear left channel.
[0022]
The directional microphone unit 14 is disposed toward the vicinity of 135 degrees from the front
10-05-2019
5
of the camera to the right, and records the sound source (RR) of the rear right channel.
[0023]
The directional microphone unit 15 is disposed 180 degrees behind the camera and records a
sound source (RC) of the rear center channel.
[0024]
The sound collection level of the directional microphone unit 15 in the rear center channel is set
lower than the sound collection levels of the directional microphone units 11 to 14 on the front
left, right, and rear.
[0025]
As shown in FIG. 1, the directional microphone unit 15 of the rear center channel is directed to a
sound source direction such as narration, which the photographer present in the middle position
of the directional microphone units 13 and 14 of the rear left and right channels speaks. Since
the sound is arranged, the sound emitted by the photographer is clearly picked up by the
directional microphone unit 15.
[0026]
Further, since the directional microphone units 13 and 14 in the rear left and right channels are
unidirectional microphone units, the voice of the photographer is collected small.
[0027]
If voices collected by the directional microphone units 11 to 15 corresponding to the five
channels described above are individually output (when five channels are output), the circuit as
shown in FIG. The output signals of the microphone units 11 to 15 are output from the output
terminals 11O to 15O, respectively.
[0028]
First, when the output of the microphone of the present invention is reproduced by a multichannel player or the like, the sound collected by the directional microphone unit 15 in the rear
center channel (such as the narrator of the photographer) is localized at the front center An
embodiment of the invention will be described with reference to FIG.
10-05-2019
6
[0029]
FIG. 3 shows the electrical configuration (four-channel signal circuit) of the four-channel
microphone 20 of FIG. 1 and the planar arrangement of the directional microphone units 11-15.
In FIG. 3, the same parts as in FIG. 1 are indicated by the same reference numerals.
[0030]
25L is an adder for adding the outputs of the directional microphone units 11 and 15 of the
front left channel (FL) and the rear center channel (RC), and 25R is the directivity of the front
right channel (FR) and the rear center channel (RC) Of the outputs of the directional microphone
units 15 of the rear center channel (RC) are equally divided into two in the adders 25L, 25R Inphase, same-level signals are configured to be added respectively.
[0031]
The output signal of the adder 25L is output from the output terminal 21O as the sound signal
FL1 of the front left channel.
The output signal of the adder 25R is output from the output terminal 22O as the sound signal
FR1 of the front right channel.
[0032]
26L is a subtractor that subtracts the output of the rear center channel (RC) directional
microphone unit 15 from the output of the rear left channel (RL) directional microphone unit 13,
and 26R is a rear right channel (RR) It is a subtractor that subtracts the output of the directional
microphone unit 15 of the rear center channel (RC) from the output of the directional
microphone unit 14, and these subtracters 26L and 26R are directed microphone units of the
rear center channel (RC) It is configured such that signals (in-phase, same-level signals) obtained
by dividing 15 outputs into two equal volumes are introduced respectively.
[0033]
10-05-2019
7
The output signal of the subtractor 26L is output from the output terminal 23O as the sound
signal RL1 of the rear left channel.
The output signal of the subtractor 26R is output from the output terminal 24O as the sound
signal RR1 of the rear right channel.
[0034]
According to the circuit of FIG. 3, the narration components emitted by the photographer of the
directional microphone unit 15 of the rear center channel (RC) are added to the front left and
right channels (FL, FR), and the rear left and right channels (RL) , RR), so that the narration is
localized at the front center when played back by a multi-channel player or the like.
[0035]
Next, when the output of the microphone of the present invention is reproduced by a multichannel player or the like, the sound collected by the directional microphone unit 15 in the back
center channel (such as the narrator of the photographer) is localized at the back center An
embodiment of the invention will be described with reference to FIG.
[0036]
FIG. 4 shows the electrical configuration (four-channel signal circuit) of the four-channel
microphone 20 of FIG. 1 and the planar arrangement of the directional microphone units 11-15.
In FIG. 4, the same parts as in FIG. 1 and FIG. 3 are indicated by the same reference numerals.
[0037]
35L is an adder that adds the outputs of the directional microphone units 13 and 15 of the rear
left channel (RL) and the rear center channel (RC), and 35R is the directivity of the rear right
channel (RR) and the rear center channel (RC) Of the outputs of the directional microphone units
14 of the rear center channel (RC) are equally divided into two in the adders 35L, 35R In-phase,
same-level signals are configured to be added respectively.
10-05-2019
8
[0038]
The output signal of the adder 35L is output from the output terminal 23O as the sound signal
RL1 of the rear left channel.
The output signal of the adder 35R is output from the output terminal 24O as the sound signal
RR1 of the rear right channel.
[0039]
36L is a subtractor which subtracts the output of the directional microphone unit 15 of the rear
center channel (RC) from the output of the directional microphone unit 11 of the front left
channel (FL), and 36R is a subtractor of the front right channel (FR) It is a subtractor that
subtracts the output of the directional microphone unit 15 of the rear center channel (RC) from
the output of the directional microphone unit 12, and these subtractors 36L and 36R are
directed microphone units of the rear center channel (RC) It is configured such that signals (inphase, same-level signals) obtained by dividing 15 outputs into two equal volumes are introduced
respectively.
[0040]
The output signal of the subtractor 36L is output from the output terminal 21O as the sound
signal FL1 of the front left channel.
The output signal of the subtractor 36R is output from the output terminal 22O as the sound
signal FR1 of the front right channel.
[0041]
According to the circuit of FIG. 4, the narration components emitted by the photographer of the
directional microphone unit 15 of the rear center channel (RC) are added to the rear left and
right channels (RL, RR), and the front left and right channels (FL) , FR), so that when reproduced
by a multi-channel player, the narration is localized at the rear center.
[0042]
10-05-2019
9
Next, an embodiment in which the directional microphone unit 15 of the rear center channel can
be detached from the microphone alone will be described with reference to FIGS.
[0043]
FIG. 5A shows a front left channel (FL) of the directional microphone units 11 to 15 of the
microphones 40 attached to the main body 10 of the video camcorder, with the directional
microphone unit 15 of the rear center channel drawn to the outside. Figure 4 shows a
perspective view seen from the side, and 41 is a lead wire.
[0044]
FIG. 5B shows a perspective view of the microphone 40 as viewed from the rear right channel
(RR) side, and the directional microphone unit 15 of the rear center channel has a mounting
portion in which the side plate of the case 40 a of the microphone 40 is cut out. It is detachably
mounted on (not shown).
[0045]
A release button 42 is provided on the upper surface of the case 40a, and the release button 42
is provided at a position away from the microphone 40 by pulling out the directional microphone
unit 15 of the rear center channel from the case 40a and pulling it out. In use, it acts as a switch
for disabling the subtractors 26L, 26R, 36L, 36R of FIGS.
[0046]
Also in the microphone of FIG. 5, as in the above embodiment, the voice (such as narration) of the
microphone unit 15 of the rear center channel is localized at the front center as shown in FIG. It
is made to localize.
[0047]
In FIG. 6, the same parts as those in FIG. 3 are denoted by the same reference numerals. The
difference from FIG. 3 is that the electric path connecting the microphone unit 15 in the rear
center channel and the subtractors 26R and 26L is not directly connected. This is because the
contact 42a of the release button 42 acting as a switch is inserted.
[0048]
7, the same parts as in FIG. 4 are indicated by the same reference numerals, and the difference
from FIG. This is because the contact 42a of the release button 42 acting as a switch is inserted
10-05-2019
10
in the electric path connecting the connection point 36a.
[0049]
When the directional microphone unit 15 of the rear center channel is mounted on the case 40a
and used in the microphone configured as described above, the release button 42 is in the OFF
state, for example, and the contact 42a is It is closed.
[0050]
In this case, the circuit of FIG. 6 is electrically equivalent to the circuit of FIG. 3 and is identical to
the operation described in FIG. 3, and the circuit of FIG. 7 is electrically equivalent to the circuit
of FIG. It is identical to the operation.
[0051]
In addition, when the video camcorder with the microphone 40 of the present invention attached
is fixed to a tripod or the like and shooting is desired, the release button 42 is switched on, for
example, to narrate at a position away from the video camcorder. The microphone unit 15 of the
rear center channel is pulled out of the case 40 and used.
[0052]
In this case, since the contact 42a in FIGS. 6 and 7 is opened, the audio output of the microphone
unit 15 in the rear center channel is not subtracted by the subtractors 26L and 26R in FIG. 6 and
the subtracters 36L and 36R in FIG.
[0053]
For this reason, the voice of the directional microphone unit 15 of the rear center channel that is
not picked up by the directional microphone units 13 and 14 of the rear left and right channels
in FIG. It is possible to prevent the counter effect from being subtracted from the sexual
microphone units 13 and 14.
[0054]
Similarly, in the case of FIG. 7, the sound of the directional microphone unit 15 of the rear center
channel which is not picked up by the directional microphone units 11 and 12 of the front left
and right channels of FIG. It is prevented that the adverse effect is caused by subtraction from
the directional microphone units 11 and 12 of the left and right channels.
10-05-2019
11
[0055]
Also when extracting the sound of the rear center channel (RC) for multichannel, if the in-phase
component is extracted from the sound signals FL1 and FR1 of the front left and right channels
in the case of FIG. 3 and FIG. In the case of FIGS. 4 and 7, if the in-phase component is extracted
from the sound signals RL1 and RR1 of the rear left and right channels, the sound recorded by
the directional microphone unit 15 of the original rear center channel is extracted and
reproduced. can do.
[0056]
Further, in the present invention, since the sound is picked up by the microphone unit for
narration, that is, the directional microphone unit 15 of the rear center channel, it is not pseudo.
[0057]
FIG. 1 is a perspective view of an example embodiment of the present invention applied to a
video camcorder.
BRIEF DESCRIPTION OF THE DRAWINGS The block diagram for demonstrating the basic
principle of this invention.
The circuit diagram which shows an example of the example of embodiment by which the sound
of the back center channel was localized in the front center of this invention.
The circuit diagram which shows an example of the example of embodiment which made the
sound of the back center channel localize on back center of this invention.
The other embodiment example which applied this invention to the video camcorder is
represented, (a) is the perspective view seen from the front channel side, (b) is the perspective
view seen from the back channel side.
FIG. 7 is a circuit diagram showing another example of the embodiment of the present invention
in which the sound of the rear center channel is localized at the front center.
10-05-2019
12
FIG. 7 is a circuit diagram showing another example of the embodiment of the present invention
in which the sound of the rear center channel is localized to the rear center.
Explanation of sign
[0058]
DESCRIPTION OF SYMBOLS 10 ... Main part of video camcorder, 11-15 ... Directional microphone
unit, 20, 40 ... 4 channel microphone, 21O-24O ... Output terminal, 25L, 25R, 35L, 35R ... Adder,
26L, 26R, 36L, 36R ... Subtractor 40a case 41 lead wire 42 release button 42a contact point.
10-05-2019
13
Документ
Категория
Без категории
Просмотров
0
Размер файла
21 Кб
Теги
jp2005341073
1/--страниц
Пожаловаться на содержимое документа