JP2018182518A - All-sky camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an all-sky camera device that takes an all-sky image, obtains a sound with a microphone to generate a three-dimensional sound field, and reduces the possibility of breakage of a microphone, suppress an increase in arithmetic processing, and minimizes cost increase to obtain a three-dimensional sound field with realistic feeling.SOLUTION: A line segment 400 that connects a pair of first directional microphones 4A and 4B is positioned on the side of a front panel part 10, and a line segment 401 that connects a pair of second directional microphones 4C and 4D is positioned on the side of a rear panel part 11 side, such that the line segments are located in a twisted relationship with a camera housing 1 interposed therebetween. In a case in which the pair of first directional microphones 4A and 4B and the pair of second directional microphones 4C and 4D are disposed as described above, even when the number of microphones is limited to four in total, it is possible to direct the directivity of sound pickup to all directions.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an omnidirectional camera apparatus for capturing an omnidirectional image, and more particularly to an omnidirectional camera apparatus provided with a microphone for capturing audio of a three-dimensional sound field when capturing a moving image.

  Conventionally, it has been known to shoot an omnidirectional video with a omnidirectional camera device, but for audio, using one non-directional microphone, picking up omnidirectional audio at that microphone position and collecting audio What (recording) is common.

  However, in the omnidirectional animation, a part of the angle of view may be cut out and the animation may be played back at that angle of view, but at this time the audio is collected with only one omnidirectional audio. Even if the images are reproduced at different angles of view, the audio conditions are all the same, and there is a problem that the sense of reality is poor.

  Therefore, in order to enhance the sense of reality, it is conceivable to provide a plurality of directional microphones or the like to capture the sound of the three-dimensional sound field.

  For example, Patent Document 1 below discloses a panoramic reproduction apparatus that three-dimensionally arranges five directional microphones and takes in the sound of a three-dimensional sound field.

  However, according to the structure of this patent document 1, since the positions of the centers of the plurality of lenses for acquiring the omnidirectional image and the centers of the plurality of microphones are largely separated, an image of the obtained omnidirectional image is obtained. A gap occurs between the center and the audio center of the three-dimensional sound field, and when moving images are played back, there is a possibility that the difference between the image and the audio may cause discomfort.

  Therefore, in order to align the image center and the sound center, for example, as in Patent Document 2 below, it is conceivable to arrange a microphone on the surface of a housing of a camera device provided with a lens. Although this below-mentioned patent document 2 is not a full spherical camera, in order to pick up the sound of a three-dimensional sound field, eight nondirectional microphones are arrange | positioned in the vertex position of the cube which is a housing | casing. By disposing the microphone in the housing as described above, the difference between the image center and the sound center is eliminated, so that the difference between the angle of view and the sound field is eliminated, and it is possible to suppress the discomfort.

JP 2001-298733 A JP, 2016-163181, A

  By the way, in the omnidirectional camera apparatus, it is often used as an action camera, and when the camera apparatus is used outdoors, there is a high possibility that the camera apparatus itself may receive an impact.

  At this time, as in the case of Patent Document 2 described above, if microphones are installed at all eight locations, which are the vertex positions of the cube, there is a risk that the microphones may be broken due to being provided at the vertex positions. As a result, some microphones may be damaged, resulting in an unrecognizable top (microphone), which may not be able to obtain a satisfactory three-dimensional sound field.

  In particular, the camera apparatus of Patent Document 2 sets eight nondirectional microphones and shifts the position of each microphone to obtain directivity of the sound, so when some microphones are broken, the sound is generated. The problem is that the three-dimensional sound field can not be obtained.

  In addition, when microphones are installed at eight locations, a three-dimensional sound field can be obtained from eight audio signals, but the number of audio input signals increases, so the amount of arithmetic processing increases, and the whole sky There is also a problem that the control unit of the ball camera device is heavily burdened.

  Furthermore, when eight microphones are set to pick up sound, the number of microphones also increases significantly, and there is also a problem that cost increases can not be avoided.

  The present invention has been made in view of such a point, and its object is to capture an omnidirectional image, obtain audio with a plurality of microphones, and collect a three-dimensional sound field. To provide an all-sky camera device capable of obtaining a realistic three-dimensional sound field while reducing the possibility of microphone breakage, suppressing the increase in arithmetic processing, and minimizing the cost increase. It is.

  In order to achieve the object, according to the present invention, an omnidirectional camera apparatus for capturing an omnidirectional image with a plurality of fisheye lenses or wide angle lenses, wherein the lenses are provided on the front and rear faces of a rectangular body shaped housing Are provided, and a pair of first directional microphones are provided on both sides of the lens on the front surface of the housing, and a torsional relationship with respect to the pair of first directional microphones on both sides of the lens on the rear surface of the housing And a structure in which a pair of second directional microphones are provided.

  Specifically, in the first aspect of the present invention, there is provided an omnidirectional camera apparatus for capturing an omnidirectional image with a plurality of fisheye lenses or wide-angle lenses, wherein the fisheye lens or the wide-angle lens is a rectangle installed at least on the front and back. A pair of first directional microphones are installed on both sides of the body-shaped casing and the lens on the front of the casing, and a pair of second directional microphones on the both sides of the lens on the back of the casing A directional microphone is installed, and a line segment connecting the pair of first directional microphones and a line segment connecting the pair of second directional microphones are set to be positioned in a twisting relationship. It is a thing.

  According to this configuration, fisheye lenses or wide-angle lenses are provided on the front and rear faces of the rectangular-shaped housing, and a pair of first directional microphones and a pair of second directional microphones are provided on both sides of these lenses. And the line segment connecting the pair of first directional microphones and the line segment connecting the pair of second directional microphones in a torsional relationship, so that the number of microphones is set. Even if it is limited to four in total, the directivity of sound collection can be directed to all directions.

  That is, by using four directional microphones and arranging each microphone in a twisted relationship, the normal directions of the microphones substantially match in the direction of each vertex from the center of gravity of the substantially tetrahedron, a total of four microphones Even in this case, it is possible to satisfy the sound pickup performance for all 360 ° azimuths.

  Therefore, while arranging a plurality of microphones in a housing provided with a lens, the number of microphones can be reduced as much as possible, and the sound of the three-dimensional sound field can be collected.

  The type and the like of the first directional microphone and the second directional microphone are not limited as long as the microphones have specific directivity. For example, it may be a unidirectional microphone, a narrow directional microphone, a sharp directional microphone, a super directional microphone, or the like.

  In addition, for example, when the line segment connecting the pair of first directional microphones and the line segment connecting the pair of second directional microphones are positioned in a twisting relationship, the state in which the housing is projected and viewed from the front side, for example And the line segment connecting the pair of first directional microphones and the line segment connecting the pair of second directional microphones are in a positional relationship of intersection, for example, approximately by two line segments. It means that it is in a positional relationship such that an X shape or a substantially cross shape is formed.

  In a second aspect of the invention, the pair of first directional microphones is installed at a corner of the front surface, and the pair of second directional microphones is set at a corner of the rear surface.

  According to this configuration, the first directional microphone is at the front corner, and the second directional microphone is at the rear corner, so that the position is farther from the lens in the front of the housing or in the rear. The microphone will be placed.

  For this reason, it becomes difficult for the first directional microphone and the second directional microphone to be reflected in the lens, so that the installation freedom of each microphone can be enhanced.

  Therefore, for example, since the microphone can be provided so as to project outward from the housing, etc., the sound collection performance of the microphone can be improved while maintaining the image state of the omnidirectional image.

  In a third aspect of the invention, a support bracket is provided for supporting the pair of first directional microphones and the pair of second directional microphones so as to protrude outward from the housing.

  According to this configuration, by providing the support bracket, the first directional microphone and the second directional microphone can be positioned to largely protrude outward from the housing.

  For this reason, a space for sound collection can be reliably secured in front of and behind the diaphragm of the directional microphone.

  Therefore, even though the first directional microphone and the second directional microphone are provided in the housing, the sound collecting performance of the directional microphone can be further enhanced.

  In a fourth aspect of the invention, the amount of protrusion of the pair of first directional microphones and the pair of second directional microphones toward the front side and the rear side from the housing is the front side and the rear side of the fisheye lens or the wide-angle lens. It is set to the amount of protrusion to the side or less.

  According to this configuration, the amount of forward and backward protrusion from the housing of the first directional microphone and the second directional microphone is set equal to or less than the amount of forward or backward projection of the fisheye lens or the wide-angle lens By doing this, even if the first directional microphone and the second directional microphone protrude from the housing, they do not protrude further than the fisheye lens or the wide-angle lens on the front side and the rear side.

  Therefore, when an impact is applied to the omnidirectional camera device from the front side or the rear side, the impact acts not only on the first directional microphone or the second directional microphone but also on the fisheye lens or the wide-angle lens side. The impact load acting on the first directional microphone or the second directional microphone can be alleviated.

  Therefore, the impact load can be dispersed to the side of the fisheye lens or the wide-angle lens while making the first directional microphone and the second directional microphone project from the housing, so that the first directional microphone or the second directional microphone can The possibility of breakage can be minimized.

  In the fifth invention, the pair of first directional microphones and the pair of second directional microphones are set such that the directivity direction of the microphones faces the center side of the housing.

  According to this configuration, the directivity directions of the first directional microphone and the second directional microphone are arranged to face the center side (inner side) of the housing. That is, the plurality of microphones are arranged in a so-called XY arrangement.

  For this reason, since there is no shield such as a housing on the opposite side of the directional direction of the microphone, it is possible to improve the sound collecting performance of the directional microphones of the first directional microphone and the second directional microphone.

  Therefore, the sound of the three-dimensional sound field can be picked up with enhanced presence.

  As described above, according to the present invention, while arranging a plurality of microphones in a housing provided with a lens, the number of microphones can be reduced as much as possible to collect sound in a three-dimensional sound field. it can.

  Therefore, in the omnidirectional camera apparatus that captures an omnidirectional image and acquires sound with a microphone to generate a three-dimensional sound field, the possibility of microphone breakage is reduced, and an increase in arithmetic processing is also suppressed. It is possible to obtain a realistic 3D sound field while minimizing the cost increase.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole perspective view of the omnidirectional camera apparatus which concerns on Embodiment 1 of this invention. FIG. 2 is a front view of the omnidirectional camera device of Embodiment 1. FIG. 2 is a rear view of the omnidirectional camera apparatus of Embodiment 1. FIG. 2 is a left side view of the omnidirectional camera device of the first embodiment. FIG. 2 is a right side view of the omnidirectional camera apparatus of Embodiment 1. FIG. 2 is a plan view of the omnidirectional camera apparatus of Embodiment 1. FIG. 2 is a bottom view of the omnidirectional camera apparatus of Embodiment 1. 1 is a schematic plan view of the omnidirectional camera of Embodiment 1. FIG. FIG. 2 is a schematic perspective view showing an arrangement relationship of microphones of the omnidirectional camera device of Embodiment 1. FIG. 2 is a schematic view of a front view showing an arrangement relationship of microphones of the omnidirectional camera device of Embodiment 1. FIG. 7 is an overall perspective view of an omnidirectional camera apparatus according to a second embodiment. FIG. 7 is a schematic plan view of the omnidirectional camera device of Embodiment 2. FIG. 14 is a schematic view of a front view showing an arrangement relationship of microphones of the omnidirectional camera device of Embodiment 3.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its applications, or its uses.

(Embodiment 1)
FIG. 1 is an overall perspective view of an omnidirectional camera apparatus according to a first embodiment of the present invention. 2A, 2B, 2C, 2D, 2E and 2F respectively show a front view, a rear view, a left side view, a right side view, a plan view and a bottom view of the omnidirectional camera apparatus of Embodiment 1. It is. First, the overall structure of the omnidirectional camera apparatus will be described using these figures.

  As shown in FIG. 1, the omnidirectional camera apparatus T includes a camera housing 1 which is a substantially rectangular housing, a first fisheye lens 2 provided on the front of the camera housing 1, and a rear surface of the camera housing 1. A second fisheye lens 3 provided and four directional microphones 4A, 4B, 4C, 4D provided at four corners of the camera housing 1 are provided. In addition, the front-back direction, the up-down direction, and the left-right direction of the omnidirectional camera device T are respectively defined by arrows shown in FIG.

  Although not shown, the camera housing 1 includes an image control device that generates an omnidirectional image from the hemispheric image captured by the first fisheye lens 2 and the second fisheye lens 3, and four directional microphones 4A. , 4B, 4C, 4D, and an audio control device for generating audio data of a three-dimensional sound field from audio information collected by the controller, and further, a control device etc. functioning as an omnidirectional camera device.

  Further, although not shown, on the surface of the camera casing 1, there are provided an operation button, an operation panel, a display panel and the like, and a connection terminal for connecting to an external device.

  The above-described camera housing 1 comprises a substantially square front panel portion 10, a substantially square rear panel portion 11, and a side panel portion 12 extending and connecting the entire periphery of both panel portions in the front-rear direction. It is done.

  At the central position of the front panel portion 10, a lens pedestal 13 is provided which protrudes forward in a substantially square shape. Further, at the central position of the rear surface panel portion 11, a lens pedestal portion 14 which protrudes to the rear side in a substantially square shape is provided.

  Furthermore, the side panel portion 12 includes an upper side portion 12a located on the upper side, left and right side portions 12b and 12c located on the left and right sides, and a lower side portion 12d located on the lower side, and connects the respective side portions The portion is provided with a corner surface 12e formed by a curved surface.

  Thus, the camera housing 1 is a rectangular body having a short front-rear length and a substantially square shape in front view by combining the respective panel portions 10, 11, 12a, 12b, 12c, 12d, 12e. It is configured.

  Specifically, as shown in FIG. 2A, by setting the vertical dimension H of the camera housing 1 and the horizontal dimension W to be substantially the same, the front view is made into a substantially square rectangular shape. However, the vertical dimension H and the horizontal dimension W may be set to any appropriate size.

  Further, between the corner surface portion 12e and the side surface portions 12a, 12b, 12c, and 12d, there is provided a cylindrical portion 15 which extends in the front-rear direction and which protrudes substantially in a round shape. And this cylindrical part 15 forms a female screw (not shown) in an inner peripheral surface so that support brackets 5A, 5B, 5C, 5D of the below-mentioned microphone can be screwed and fixed.

  As described above, the first fisheye lens 2 is formed of a convex lens as is well known, and is provided on the lens base 13 of the front panel 10 so that the lens surface is largely protruded to the front side. The first fish-eye lens 2 is set so as to capture the scene on the front side of the omnidirectional camera device T as a semi-spherical image.

  The second fish-eye lens 3 described above is also formed of a convex lens as is well known, and is provided on the lens base 13 of the rear surface panel 11 so that the lens surface projects largely to the rear side. The second fisheye lens 3 is set so as to capture a scene on the rear side of the omnidirectional camera apparatus T as a semispherical image.

  In this way, using the two half-astronomical images captured by the first fish-eye lens 2 and the second fish-eye lens 3, an image control device (not shown) is configured to generate a 360-degree all-around spherical image.

  The directional microphones 4A, 4B, 4C, 4D described above are a pair of first directional microphones 4A, 4B provided on the front panel portion 10 side of the camera housing 1 and a pair of second directional microphones provided on the rear surface panel portion 11 side. A total of four directional microphones 4C and 4D are provided.

  First, as shown in FIG. 2A, the pair of first directional microphones 4A and 4B are set on both sides of the first fisheye lens 2 of the front panel unit 10, and the upper left corner (4A) , One at each of the lower right corner (4B).

  Further, as shown in FIG. 2B, the pair of second directional microphones 4C and 4D are set at both side positions sandwiching the second fisheye lens 3 of the rear panel portion 11, and the upper right corner (4C) , One at each of the lower left corner (4D).

  These directional microphones 4A, 4B, 4C, 4D are all composed of unidirectional microphones, and a diaphragm 40 provided therein, a sound collection opening 41 set in the sound collection direction, and vibration It is constituted by a rear opening 42 set as a passage of sound behind the plate 40 (see 4A, 4C in FIG. 2A).

  The first directional microphones 4A and 4B and the second directional microphones 4C and 4D are all installed and fixed to the camera housing 1 by supporting brackets 5A, 5B, 5C and 5D.

  The support brackets 5A, 5B, 5C, 5D are, as shown in 5B of FIG. 1, a ring portion 50 for supporting the diaphragm 40 of the directional microphone, and two two members extending integrally in a fork from the ring portion 50. It comprises leg portions 51, 51, and two cylindrical cylindrical attachment portions 52, 52 provided at the tips of the leg portions 51, 51. The through hole 53 of the mounting cylinder 52 has an inner diameter through which the mounting screw 54 (see FIG. 2) can be inserted.

  The support bracket 5A (5B, 5C, 5D) is fixed to the cylindrical portion 15, 15 of the camera housing 1 by screwing the mounting cylindrical portion 52, 52 with the two mounting screws 54, 54. It is installed and fixed.

  The first directional microphones 4A, 4B and the second directional microphones 4C, 4D are installed and fixed to the camera housing 1 by the support brackets 5A, 5B, 5C, 5D, so that the diaphragm 40 is removed from the camera housing 1 Since they can be positioned apart from each other, a space for sound collection can be reliably secured around the aforementioned sound collection opening 41 and the rear opening 42 (forward and backward of the diaphragm 40).

  Therefore, while the first directional microphones 4A and 4B and the second directional microphones 4C and 4B are installed in the camera housing 1, the sound collection performance of the directional microphones 4A, 4B, 4C and 4D can be further enhanced.

  The first directional microphones 4A and 4B from the camera housing 1 and the second directional microphones can be further extended by lengthening the legs 51 and the mounting cylinder 52 of the support brackets 5A, 5B, 5C and 5D. 4C, 4D can be separated. Thus, when configured, the influence of the camera housing 1 can be completely eliminated, and the sound collection performance of the first directional microphones 4A and 4B and the second directional microphones 4C and 4D can be further enhanced.

  However, if the length of the leg 51 and the mounting cylinder 52 of the support brackets 5A, 5B, 5C, 5D is made too long, the first directional microphones 4A, 4B and the second directional microphones 4C, 4D However, the first directional microphones 4A and 4B and the second directional microphones 4C and 4D enter the photographing areas of the first fisheye lens 2 and the second fisheye lens 3 and take in the hemispheric images captured by the lenses 2 and 3, respectively. There is a risk of reflection.

  For this reason, the lengths of the legs 51 and the mounting cylinder 52 of the support brackets 5A, 5B, 5C, 5D should be as long as possible in an area which does not enter the imaging areas of the first fisheye lens 2 and the second fisheye lens 3. Is desirable.

  Further, both the first directional microphones 4A, 4B and the second directional microphones 4C, 4D are directed to the center side (inner side) of the camera housing 1 by the support brackets 5A, 5B, 5C, 5D. The diaphragm 40 is installed to be inclined.

  Specifically, as shown in FIG. 2A, in front view, the pair of first directional microphones 4A and 4B both have their sound collecting directions (solid arrows) facing the center side of the camera housing 1, It inclines so as to face approximately 45 degrees inward from the horizontal line x. In addition, the pair of second directional microphones 4C and 4D are both inclined so that the sound collecting direction (the arrow of the broken line) faces approximately 45 ° inward from the horizontal line x so that it faces the center of the camera housing 1. There is.

  Further, as shown in FIGS. 2C and 2D, even in the side view, the pair of first directional microphones 4A and 4B both have their sound collecting directions (solid arrows) facing the center side of the camera housing 1, The two second directional microphones 4C and 4D are both inclined from the horizontal line x by about 30 °, and both of the pair of second directional microphones 4C and 4D are directed from the horizontal line x so that the sound collecting direction (solid arrow) faces the center side of the camera housing 1 It is inclined to turn approximately 30 degrees inward.

  Note that this inclination angle is an ideal arrangement relationship in which the normal direction of the microphone coincides with each vertex direction from the center of gravity of the substantially regular tetrahedron by arranging so as to face approximately 45 ° inward from the horizontal line x. . However, this inclination angle is not limited to this depending on the relationship with the camera housing 1, the first fisheye lens 2, and the second fisheye lens 3, and may be, for example, 30 ° as in this embodiment. You may arrange so that it may become about °.

  Furthermore, as shown in FIG. 2F and FIG. 2E, also in the plan view and the bottom view, both of the first directional microphones 4A and 4B in the sound collecting direction (solid arrows) are on the center side of the camera housing 1 ( The two second directional microphones 4C and 4D are both inclined so that they face inward approximately 30 ° from the longitudinal direction line y, and the sound collecting direction (solid arrows) of the pair of second directional microphones 4C and 4D are both It inclines so as to face the center side and to face approximately 30 degrees inward from the longitudinal direction line y.

  Note that, even with this inclination angle, the arrangement direction of the microphone is the same as that of the substantially regular tetrahedron by aligning the normal direction of the microphone in the respective vertex directions by arranging so as to face approximately 45 degrees inward from the longitudinal direction line y. It becomes. The angle of inclination is not limited to the above depending on the relationship with the camera housing 1, the first fisheye lens 2 and the second fisheye lens 3. For example, as in this embodiment, it may be 30 ° or about 60 °. It may be arranged to be

  As described above, both of the pair of first directional microphones 4A and 4B and the pair of second directional microphones 4C and 4D are set such that the sound collection direction faces the center side (inner side) of the camera housing 1 There is.

  Thus, the pair of first directional microphones 4A and 4B are arranged in a so-called XY arrangement of microphones and configured to pick up sound from the opposite side of the installation position. Further, the pair of second directional microphones 4C and 4D are also arranged in a so-called XY arrangement of microphones, and both are configured to pick up sound from the opposite side of the installation position.

  As described above, both the pair of first directional microphones 4A and 4B and the pair of second directional microphones 4C and 4D are both arranged in the XY configuration, so that the rear side of the diaphragm 40 (the rear opening 42 side is In addition, since the camera housing 1 etc. can not be completely present and a complete open space can be obtained, sound can be collected with the directivity performance of the directional microphones 4A, 4B, 4C, 4E further enhanced.

  Therefore, sound can be collected which can reproduce a more realistic three-dimensional sound field.

  Further, as described above, by providing the pair of first directional microphones 4A and 4B and the pair of second directional microphones 4C and 4D on the camera housing 1 and arranging them in the XY direction, the first of the camera housing 1 is obtained. On the optical axis of the lens formed by the fisheye lens 2 and the second fisheye lens 3, both the sound collection lines of the pair of first directional microphones 4A and 4B and the sound collection lines of the pair of second directional microphones 4C and 4D It can be crossed.

  This point will be described with reference to FIG. FIG. 3 is a schematic plan view of the omnidirectional camera apparatus T according to the first embodiment.

  As shown in FIG. 3, the optical axis LL of the lens is formed by an imaginary line (LL) extending in the normal direction of the lenses 2 and 3, passing through the centers of the first fisheye lens 2 and the second fisheye lens 3. . On the other hand, the sound collection axes Ra, Rb, Rc and Rd of the pair of first directional microphones 4A and 4B and the pair of second directional microphones 4C and 4D are vibrations of the directional microphones 4A, 4B, 4C and 4D. It is composed of virtual lines (Ra, Rb, Rc, Rd) which pass through the center of the plate 40 and extend in the normal direction of the diaphragm 40 (see FIG. 1).

  As shown in this figure, the sound collection lines Ra and Rb of the pair of first directional microphones 4A and 4B intersect in the space in front of the first fisheye lens 2 on the optical axis LL of the lens. On the other hand, the sound collection lines Rc and Rd of the pair of second directional microphones 4C and 4D also intersect on the optical axis LL of the lens in the space behind the second fisheye lens 3.

  Therefore, there is a gap between the center of the image taken by the first fisheye lens 2 and the second fisheye lens 3 and the center of the sound collected by the first directional microphones 4A, 4B and the second directional microphones 4C, 4D. There is no difference between the omnidirectional image and the three-dimensional sound field.

  As described above, by eliminating the shift between the omnidirectional image and the three-dimensional sound field, it is possible to suppress the discomfort due to the shift between the angle of view and the sound field while enhancing the sense of reality.

  Moreover, in this omnidirectional camera device T, a line segment connecting a pair of first directional microphones 4A and 4B and a line segment connecting a pair of second directional microphones 4C and 4D are positioned in a torsional relationship. Is set as.

  This point will be described with reference to FIGS. 4 and 5. FIG. 4 is a schematic perspective view showing the arrangement of the microphones of the omnidirectional camera apparatus, and FIG. 5 is a schematic view of the front view showing the arrangement of the microphones of the omnidirectional camera.

  As shown in FIG. 4, a line segment 400 connecting the pair of first directional microphones 4A and 4B is located on the front panel portion 10 side, and a line segment 401 connecting the pair of second directional microphones 4C and 4D is the back surface It is positioned on the side of the panel portion 11 and is positioned in a twisted relationship with the camera housing 1 interposed therebetween.

  That is, as shown in FIG. 5, in a front view, a line segment 400 connecting a pair of first directional microphones 4A and 4B and a line segment 401 connecting a pair of second directional microphones 4C and 4B The positional relationship is such that an “X shape” is formed.

  As described above, by arranging the pair of first directional microphones 4A and 4B and the pair of second directional microphones 4C and 4D, the directivity of sound collection can be obtained even if the total number of microphones is limited to four. It can be oriented in all directions.

  That is, by using the four directional microphones 4A, 4B, 4C, and 4D and arranging the microphones in a torsional relationship, the normal directions of the microphones substantially coincide with each other from the center of gravity of the substantially tetrahedron As a matter of fact, even with a total of four microphones, it is possible to satisfy the sound collection performance for all 360 ° azimuths.

  For this reason, while reducing the number of microphones as much as possible, it is possible to pick up the sound of the three-dimensional sound field.

  By reducing the number of microphones as described above, even if an impact is applied to the omnidirectional camera device T, microphones can be broken because microphones are not provided at all eight corners of the camera housing 1 Can be reduced.

  In addition, since sound is collected using directional microphones 4A, 4B, 4C, 4D, for example, even when one is broken, directivity is as in the case of using a plurality of nondirectional microphones. The risk of losing can be reduced.

  Furthermore, since the number of microphones can be reduced as much as possible, it is possible to suppress an increase in arithmetic processing when processing the sound of the three-dimensional sound field. In addition, since the number of microphones can be reduced as much as possible, the cost increase at the time of manufacture can also be minimized.

  Therefore, in the omnidirectional camera apparatus T that captures an omnidirectional image and acquires sound with a microphone to generate a three-dimensional sound field, the possibility of microphone breakage is reduced and an increase in arithmetic processing is also suppressed. It is possible to obtain a realistic three-dimensional sound field while minimizing the cost increase.

  In particular, in the present embodiment, the pair of first directional microphones 4A and 4B are installed at the corner on the front panel unit 10 side, and the pair of second directional microphones 4C and 4D are at the corner on the rear panel unit 11 side. It is set in the department.

  As a result, in the front panel unit 10 and the rear panel unit 11, the microphone is disposed at a position further from the lenses 2 and 3. That is, since the corner is the farthest from the center of the substantially square panel portions 10 and 11, the microphone is positioned at the farthest position from the lens center.

  As a result, the first directional microphones 4A and 4B and the second directional microphones 4C and 4D are less likely to be reflected on the first fisheye lens 2 and the second fisheye lens 3, so that the installation freedom of each microphone can be increased.

  Therefore, the first directional microphones 4A and 4B and the second directional microphones 4C and 4D can be protruded outward, whereby collection of the microphones can be performed while maintaining the image state of the omnidirectional image. Sound performance can be enhanced.

  Further, in the present embodiment, support brackets 5A, 5B, 5C, 5D for supporting the pair of first directional microphones 4A, 4B and the pair of second directional microphones 4C, 4D are provided.

  As a result, the first directional microphones 4A and 4B and the second directional microphones 4C and 4D can be positioned so as to largely protrude outward from the camera casing 1.

  For this reason, it is possible to reliably secure a space for sound collection in front of and behind the diaphragm 40 of the directional microphones 4A, 4B, 4C, 4D.

  Therefore, while providing the first directional microphones 4A and 4B and the second directional microphones 4C and 4D in the camera casing 1, the sound collection performance of the directional microphones 4A, 4B, 4C and 4D can be further enhanced.

  However, in the present embodiment, the amount of forward projection of the pair of first directional microphones 4A and 4B from the camera housing 1 is set equal to or less than the amount of forward projection of the first fish-eye lens 2; The amount of protrusion of the second directional microphones 4C and 4D from the camera housing 1 to the front side is set equal to or less than the amount of protrusion of the second fisheye lens 3 to the rear side.

  Specifically, as shown in FIG. 2C, the amount TM1 of protrusion of the pair of first directional microphones 4A and 4B to the front side from the camera housing 1 is greater than the amount TL1 of the protrusion of the first fisheye lens 2 to the front side The projection amount TM2 of the pair of second directional microphones 4C and 4D to the front side from the camera housing 1 is also set smaller than the projection amount TL2 of the second fisheye lens 3 to the front side. ing.

  Thereby, even if the first directional microphones 4A and 4B and the second directional microphones 4C and 4D protrude from the camera housing 1 by the support brackets 5A, 5B, 5C and 5D, the first fish-eye lens on the front side and the rear side It will not protrude more than 2 and the 2nd fisheye lens 3.

  Therefore, when the omnidirectional camera apparatus T itself receives an impact from the front or the back, not only the first directional microphones 4A, 4B or the second directional microphones 4C, 4D but also the first fisheye lens 2 or Since the impact also acts on the second fish-eye lens 3, the impact load acting on the first directional microphones 4A and 4B and the second directional microphones 4C and 4D can be relaxed.

  Therefore, since the impact load can be distributed to the first fisheye lens 2 and the second fisheye lens 3 as well, the possibility of breakage of the first directional microphones 4A and 4B or the second directional microphones 4C and 4D can be reduced as much as possible.

  Therefore, even if the first directional microphones 4A and 4B and the second directional microphones 4C and 4D are provided to protrude from the camera housing 1 by the support brackets 5A, 5B, 5C and 5D, the possibility of breakage is reduced. Can.

Second Embodiment
FIG. 6 is an overall perspective view of the omnidirectional camera apparatus according to Embodiment 2 of the present invention. FIG. 7 is a schematic plan view of the omnidirectional camera apparatus of the second embodiment. The second embodiment will be described using these figures.

  The omnidirectional camera device T of the present embodiment is a point in which the direction (directing direction) of the pair of first directional microphones 104A and 104B and the pair of second directional microphones 104C and 104D is directed to the outside of the camera housing 1 Is different from the first embodiment. The other components are the same as those of the first embodiment, so the reference numerals are attached and the description is omitted.

  The pair of first directional microphones 104A and 104B and the pair of second directional microphones 104C and 104D are vibrated by the support brackets 105A, 105B, 105C and 105D so that the sound collection directions are both directed to the outside of the camera housing 1 The plate 40 is installed inclined.

  Specifically, although not shown, in a front view, both of the pair of first directional microphones 104A and 104B are directed approximately 45 degrees outward from the horizontal line so that the sound collecting direction faces the outside of the camera housing 1 It is inclined. Further, the pair of second directional microphones 104C and 104D are also inclined so that the sound collection direction faces the outside of the camera housing 1 by about 45 ° outward from the horizontal line.

  Further, even in a side view, the pair of first directional microphones 104A and 104B are inclined so as to face approximately 30 ° outward from the horizontal line so that the sound collection direction faces the outside of the camera housing 1, and the pair of second directivity microphones The sex microphones 104C and 104D are both inclined such that the sound collection direction is directed to the outside of the camera housing 1 by about 30 ° outward from the horizontal line.

  Furthermore, also in a plan view and a bottom view, the pair of first directional microphones 104A and 104B both face the outside about 30 ° from the front-rear direction line so that the sound collection direction faces the outside of the camera housing 1 Both of the pair of second directional microphones 104C and 104D are inclined so that the sound collection direction faces the outside of the camera housing 1 by about 30 ° outward from the front-rear direction line.

  As described above, both the pair of first directional microphones 104A and 104B and the pair of second directional microphones 104C and 104D are set such that the sound collection direction is directed to the outside of the camera housing 1.

  As described above, setting the sound collection direction of the microphone so that the outside of the camera housing 1 is directed is referred to as a so-called AB arrangement, but in the present embodiment, the pair of first directional microphones 104A and 104B The second directional microphones 104A and 104B are also in the AB arrangement.

  As shown in FIG. 7, in the second embodiment as well as the first embodiment, the optical axis LL of the lens passes through the centers of the first fisheye lens 2 and the second fisheye lens 3 and is an imaginary line extending in the normal direction of the lens. It consists of (LL). In addition, the sound collecting axes Ra, Rb, Rc, and Rd of the pair of first directional microphones 104A and 104B and the pair of second directional microphones 104C and 104D are also vibrations of the directional microphones 104A, 104B, 104C, and 104D. It is composed of virtual lines (Ra, Rb, Rc, Rd) which extend through the center of the plate 40 and in the normal direction of the diaphragm 40 (see FIG. 6).

  As shown in this figure, the sound collection lines Ra and Rb of the pair of first directional microphones 104A and 104B intersect in the space behind the second fisheye lens 3 on the optical axis LL of the lens. On the other hand, the sound collection lines Rc and Rd of the pair of second directional microphones 104C and 104D intersect in the space in front of the first fisheye lens 2 on the optical axis LL of the lens.

  Also in this embodiment, both of the sound collection lines Ra and Rb of the pair of first directional microphones 104A and 104B and the sound collection lines Rc and Rd of the pair of second directional microphones 104C and 104D are the optical axes LL of the lenses. It crosses up.

  Therefore, also in this embodiment, the center of the image captured by the first fisheye lens 2 and the second fisheye lens 3 and the center of the sound collected by the first directional microphones 104A and 104B and the second directional microphones 104C and 104D. There is no gap between them, and there is no gap between the omnidirectional image and the three-dimensional sound field.

  Therefore, even in the second embodiment, there is no deviation between the omnidirectional image and the three-dimensional sound field, and the sense of reality can be enhanced.

  According to the present embodiment, both the pair of first directional microphones 104A and 104B and the pair of second directional microphones 104C and 104D are both A-B, whereby the diaphragm 40 is viewed in a front view and a rear view. And the support brackets 105A, 105B, 105C, 105D are located on the camera housing 1 side and do not protrude, so that the possibility of microphone damage is reduced compared to the omnidirectional camera device T of the first embodiment. Can.

  Further, since the amount of protrusion of the pair of first directional microphones 104A and 104B and the pair of second directional microphones 104C and 104D can be smaller than that of the omnidirectional camera device T according to the first embodiment, the normal time such as photographing It is easy to handle the

(Embodiment 3)
FIG. 8 is a schematic view of a front view showing the arrangement relationship of the microphones of the omnidirectional camera apparatus according to Embodiment 3 of the present invention.

  As shown in this figure, in the present embodiment, the camera casing 101 is configured by a rectangular body having a substantially rectangular shape in a front view, the vertical direction of which is elongated. The first fisheye lens 2 and the second fisheye lens 3 are disposed to be slightly above the center of the camera casing 101.

  The pair of first directional microphones 204A and 204B and the pair of second directional microphones 204C and 204D are set at the corner of the camera casing 101 as in the first embodiment and the like, and the pair of first directivity A line segment 500 connecting the microphones 204A and 204B and a line segment 501 connecting the pair of second directional microphones 204C and 204D are set to be positioned in a torsional relationship.

  In this embodiment, since the first fisheye lens 2 and the second fisheye lens 3 are disposed slightly above the center of the camera casing 101, the optical axis of the lens determined by the positions of the first fisheye lens 2 and the second fisheye lens 3 is It is formed slightly above the center of the camera casing 101.

  For this reason, neither the sound collection line of the pair of first directional microphones 204A and 204B nor the sound collection line of the pair of second directional microphones 204C and 204D strictly intersect on the optical axis of the lens.

  However, they are slightly misaligned in the vertical direction, and not misaligned in plan view. That is, they do not shift in the front-rear direction and the left-right direction.

  Here, the human ear is attached to the left and right, so that although the sensitivity to the left and right front and back is high, the sensitivity is low in the vertical direction.

  For this reason, as long as there is no shift in the left and right and front and back directions, as in the first embodiment and the second embodiment, no shift is felt between the image center and the sound center, and the omnidirectional image and three dimensional Deviation from the sound field can be suppressed.

  In this way, by making the camera casing 101 long in the vertical direction, the grip portion of the omnidirectional camera device T is increased, so that the handling at the time of photographing can be enhanced.

(Other embodiments)
As mentioned above, although this invention was demonstrated by Embodiment 1 thru | or 3, this invention is not limited to this embodiment.

  If the line segment connecting the pair of first directional microphones and the line segment connecting the pair of second directional microphones are set to be positioned in a twisting relationship, for example, the pair of first directional microphones And a pair of second directional microphones may be set at an intermediate position of the edge of the camera casing. In this case, the line segment connecting the pair of first directional microphones and the line segment connecting the pair of second directional microphones have a positional relationship such that a “substantially cross shape” is formed.

  According to this structure, since the first directional microphone and the second directional microphone are not located at the corners of the camera casing, the breakage of the first directional microphone and the second directional microphone can be further prevented.

  In addition, without setting the support bracket, the microphone attachment portion may be integrally formed on the camera casing, and the first directional microphone and the second directional microphone may be installed by the microphone attachment portion. With this configuration, the number of parts can be reduced.

  Furthermore, instead of the first fisheye lens 2 and the second fisheye lens 3, a wide-angle lens may be used.

  The microphones are not limited to the unidirectional microphones, and may be narrow directional microphones, sharp directional microphones, superdirective microphones, or the like.

  Otherwise, the structure may be changed or added without departing from the scope of the invention.

  As described above, the omnidirectional camera apparatus according to the present invention is useful in an omnidirectional camera apparatus that can obtain a realistic three-dimensional sound field by providing a plurality of microphones.

T: All-round camera device 1, 101: Camera casing (casing)
2 First Fish-Eye Lens 3 Second Fish-Eye Lens 4A, 4B, 104A, 104B, 204A, 204B First Directional Microphone 4C, 4D, 104C, 104D, 204C, 204D Second Directional Microphone 5A, 5B, 5C, 5D, 105A, 105B, 105C, 105D ... Support bracket 10 ... Front panel (front)
11: Rear panel (rear surface)
12: Side panel portion 400, 500: Line segment connecting a pair of first directional microphones 401, 501: line segment connecting a pair of second directional microphones

Claims (5)

An omnidirectional camera apparatus for capturing an omnidirectional image with a plurality of fisheye lenses or wide angle lenses,
A rectangular-shaped housing provided with the fisheye lens or the wide-angle lens at least on the front and back surfaces;
A pair of first directional microphones are installed on both sides of the lens on the front of the housing,
A pair of second directional microphones are installed on both sides of the lens on the rear surface of the housing,
An omnidirectional camera characterized in that a line segment connecting the pair of first directional microphones and a line segment connecting the pair of second directional microphones are positioned in a torsional relationship. apparatus. The pair of first directional microphones are placed at the front corner,
The omnidirectional camera apparatus according to claim 1, wherein the pair of second directional microphones are set at corners of a rear surface. The support bracket which supports the pair of first directional microphones and the pair of second directional microphones so as to project outward from the housing is provided. Heavenly-eye camera device. The amount of protrusion of the pair of first directional microphones and the pair of second directional microphones from the housing to the front side and the rear side is equal to or less than the projection amount to the front side and the rear side of the fisheye lens or wide-angle lens The omnidirectional camera apparatus according to claim 3 set to. The pair of first directional microphones and the pair of second directional microphones are set such that the directional direction of the microphones faces the center side of the housing. Omnidirectional camera device.

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