JP2011018995A - Camera body and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera body which collects sound emitted from an imaging object in an environment with much noise, and also to provide an imaging apparatus.SOLUTION: The camera body 100 of the imaging apparatus 1 includes: a filter processing part 25 for limiting at least a partial frequency component of sound information collected in photographing in response to a frequency characteristic corresponding to a photographing condition in photographing; and a voice-recording control part 26 for recording the sound information, where the frequency component is limited by the filter processing part 25, in association with moving image information obtained in photographing.

Description

  The present invention relates to a camera body and an imaging apparatus that collect sound during moving image shooting.

  When collecting the sound of the shooting target according to the video shooting by the imaging device, the photographer inputs the desired subject position while viewing the screen on which the shooting target is displayed on the display unit of the imaging device, and the input subject There is an imaging device that increases the directivity of the sound collection sensitivity of a microphone in the direction of the position (see, for example, Patent Document 1).

JP 2008-271157 A

  However, according to Patent Document 1, since the directivity of the sound collection sensitivity is set for the target sound collection direction, the movement of the subject is captured when the direction of the subject or the distance to the subject changes. However, there is a problem that a sound emitted from a subject that is not able to be collected and deviates from the directivity of the sound collection sensitivity is determined as an unnecessary sound and cannot be collected. Therefore, there is a problem that it is necessary to repeatedly input the position of the subject in order to follow the directivity of the sound collection sensitivity so as to improve the sound collection sensitivity in accordance with the movement of the subject.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a camera body and an imaging apparatus that collect sound generated by an imaging target even in a noisy environment.

  In order to solve the above problems, the present invention provides a signal processing means for limiting at least a part of frequency components of sound information collected at the time of shooting according to frequency characteristics according to the shooting conditions of the shooting, A camera body comprising: recording means for recording sound information, the frequency component of which is limited by the signal processing means, in association with moving image information acquired by the photographing.

  Further, the present invention is characterized in that, in the above-mentioned invention, the image processing apparatus further comprises selection means for selecting the shooting mode of the shooting based on a user operation, and the shooting condition is a shooting mode selected by the selection means. To do.

Further, the present invention is characterized in that, in the above invention, the photographing condition is a distance indicated by a distance signal output from a lens barrel detachably attached to the camera body.
Further, the present invention is characterized in that, in the above invention, the photographing condition is a focal length output from a lens barrel detachable from the camera body.

Further, the present invention is characterized in that, in the above invention, the photographing condition is a type of a lens barrel that can be attached to and detached from the camera body.
Further, the present invention is the above invention, wherein the signal processing means prohibits the restriction according to the frequency characteristic when the frequency sensitivity characteristic of the sound collecting means for outputting the sound information is unknown. Features.

  Moreover, in order to solve the said problem, this invention is provided with the camera body in any one of said, An imaging device characterized by the above-mentioned.

According to the present invention, in the camera body, the signal processing means limits at least a part of the frequency components of the sound information collected at the time of shooting according to the frequency characteristics corresponding to the shooting conditions of the shooting. The recording unit records the sound information, the frequency component of which is limited by the signal processing unit, in association with the moving image information acquired by photographing.
Thereby, the camera body can collect the sound emitted by the imaging target in a noisy environment.
According to the present invention, an imaging device includes the camera body described above.
Thereby, the imaging device can collect the sound emitted by the imaging target in a noisy environment.

It is a block diagram which shows the structure of the imaging device by one Embodiment of this invention. It is a flowchart which shows the sound collection control process by 1st Embodiment. It is a flowchart which shows the sound collection control process by 2nd Embodiment. It is a flowchart which shows the sound collection control process by 3rd Embodiment. It is a flowchart which shows the sound collection control process by 4th Embodiment.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating the configuration of the imaging apparatus according to the present embodiment. The imaging apparatus 1 shown in this figure includes a camera body 100 and a lens barrel 200 attached to the camera body 100.
In the imaging apparatus 1, the lens barrel 200 includes an optical system 210, an optical system driving unit 220, and an optical system control unit 230.
The optical system 210 in the lens barrel 200 includes an optical element that adjusts the output of light to the imaging element 8 and a structure that protects the optical element and the like. For example, the optical system 210 has a focus adjustment mechanism that adjusts the focal point according to the subject distance, a zoom mechanism that adjusts the focal distance and changes the shooting angle of view, an aperture mechanism that adjusts the amount of light passing through, and the like. Various sensors and encoders for detecting the state are provided. The focus adjustment mechanism is provided with a distance ring indicating a set distance while setting and interlocking with a distance according to a user operation. The optical system drive unit 220 drives the optical system 210 with an actuator such as a motor in accordance with a control signal from the control unit 20 to adjust the output of light to the image sensor 8. The optical system control unit 230 collects information on various sensors and encoders provided in the optical system 210 and notifies the control unit 20 of the information. The information notified from the optical system control unit 230 includes lens barrel type information indicating the type of the lens barrel 200, distance information set in the distance ring of the lens barrel 200, lens lens 200 specific or zoom function. There are set focal length information, an aperture value set by the aperture function, and the like.

  In the imaging apparatus 1, the camera body 100 includes a mirror 3, a viewfinder 4, a distance measuring unit 5, an imaging element 8, a nonvolatile memory 11, a buffer memory 12, an operation detection circuit 13, a monitor control circuit 14, a monitor 15, a memory control circuit 16, A memory 17, a control unit 20, a microphone 41A, and amplification units 42A and 42B are provided. The microphone 41B is an external microphone that is selectively connected to the camera body 100.

The mirror 3 in the camera body 100 includes a main mirror 3a and a sub mirror 3b. In the mirror 3 in preparation for imaging, the main mirror 3 a reflects the light output from the camera barrel 200 and inputs it to the finder 4. Part of the light transmitted through the main mirror 3 a is reflected by the sub mirror 3 b and input to the distance measuring unit 5. At the time of imaging, the main mirror 3a is flipped up and light output from the camera barrel 200 is input to the imaging device 8.
The viewfinder 4 includes a prism 4a, a focus point display unit 4b, and a screen 4c. The prism 4a outputs the light reflected by the main mirror 3a as an upright image that can be confirmed by the photographer. The focus point display unit 4b displays a focus point (a region where focus adjustment is performed) based on control from the control unit 20. The screen 4c converts the focal length setting in the lens barrel 200 so that the photographer can visually determine and outputs it. Further, a photometric sensor 18 is provided in the finder 4 to collect a part of the light input to the prism 4 a, convert the light amount of the light, and input it to the control unit 20.

The distance measuring unit 5 receives light from the mirror 3, detects the focus adjustment state based on the image of the subject indicated by the input light, and inputs the focus adjustment state to the control unit 20.
The image sensor 8 includes a light receiving element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. The image sensor 8 outputs an image output from the optical system 210 and formed on the light receiving unit as an electrical signal. The image signal is output after conversion. The image sensor 8 amplifies the image signal output from the light receiving unit and converts it into a digital signal, and drives the image sensor 8 in accordance with a control signal from the control unit 20. An image sensor control unit that controls conversion of the converted image into an image signal, output of the converted image signal, and the like is included.

The nonvolatile memory 11 stores information such as a program for operating the control unit 20, image data that has been captured and generated, collected sound information, various settings input by the user, and imaging conditions. The stored information includes various control information such as setting information for determining the operation state of the imaging apparatus 1, threshold information for condition determination, and information on condition determination results.
The buffer memory 12 is a temporary information storage area used for the control process of the control unit 20, and includes, for example, an image signal output from the image sensor 8, sound information output from the microphone 41A, an image signal, and the like. A processing result or the like processed based on the sound information is temporarily stored by the control unit 20.

  The operation detection circuit 13 detects a user operation input to the input unit, and inputs the detected operation information to the control unit 20 as a control signal. The input unit includes, for example, a power switch 13a, a release switch 13b, an AF operation unit 13AF for controlling an autofocus (AF) operation, a selector button 13SEL for setting a shooting mode, and the like. The operation detection circuit 13 also detects an operation performed during shooting. The control unit 20 receives the operation information input to the input unit, outputs a control instruction based on the operation information, and stores the operation information in the nonvolatile memory 11.

  The monitor control circuit 14 performs, for example, display control such as turning on / off of the monitor 15 and brightness adjustment, and processing for causing the monitor 15 to display image data output from the control unit 20. The monitor 15 displays image data, and is composed of, for example, a liquid crystal display (LCD).

  The memory control circuit 16 controls input / output of information between the control unit 20 and the memory 17. For example, the memory control circuit 16 stores information such as image data and sound data generated by the control unit 20 in the memory 17 or the memory 17. A process of reading out information such as image data and sound data stored in the memory and outputting the information to the control unit 20 is performed. The memory 17 is a storage medium that can be inserted into and removed from the camera body 100, such as a memory card, and stores image data, sound data, and the like generated by the control unit 20.

The microphone 41 </ b> A collects sound information to be recorded in accordance with moving image capturing, converts the collected sound information, and outputs a sound signal. The microphone 41A is provided in front of the camera body 100, for example, has sensitivity in the frequency band of the audible frequency range, and has frequency characteristics with low frequency dependence.
The amplifying unit 42A includes an amplifying circuit that amplifies the sound signal input from the microphone 41A and an analog-digital (AD) converting circuit that converts the amplified sound signal into a digital signal. input.
The microphone 41 </ b> A and the amplification unit 42 </ b> A can be deactivated according to setting information or when the camera body 100 causes the microphone 41 </ b> B to function.

  Further, the microphone 41B collects sound information to be recorded in accordance with the moving image capturing in place of the microphone 41A, converts the collected sound information, and outputs a sound signal. The microphone 41B is provided outside the camera body 100, for example, and has a frequency characteristic having sensitivity in the frequency band of the audible frequency range. It is difficult for the microphone 41B to specify the sensitivity characteristic and the frequency characteristic like the built-in microphone 41A. When the sensitivity characteristic or frequency characteristic cannot be specified, that is, when the sensitivity characteristic or frequency characteristic is unknown, signal processing based on the collected sound is performed in the same manner as the microphone 41A that can specify the sensitivity characteristic and frequency characteristic. However, the desired performance may not be obtained. In such a case, it is possible to select not to perform the subsequent filter processing selectively on the basis of a pre-registered setting or on condition that the externally connected microphone 41B is used.

  The amplification unit 42B includes an amplification circuit that amplifies the sound signal input from the microphone 41B, and an analog-digital (AD) conversion circuit that converts the amplified sound signal into a digital signal. input. The amplifying unit 42B detects that the microphone 41B is connected, and inputs the detection information to the control unit 20. The amplifying unit 42B can stop the function of amplifying the sound signal input from the microphone 41B according to the setting information set by the control unit 20 or when the microphone 41B is not connected to the camera body 100.

  The control unit 20 includes a CPU (Central Processing Unit) that controls the operation of each unit of the camera body 100 based on a program stored in the nonvolatile memory 11. For example, the control unit 20 turns on the power to the camera body 100, controls the driving of the optical system 210 via the optical system driving unit 220, and the image sensor according to the operation information from the user input to the operation detection circuit 13. 8, display control of the monitor 15 via the monitor control circuit 14, photographing of the subject detected by the image sensor 8, and signal processing of sound information collected by the microphone 41 </ b> A or 41 </ b> B.

The control unit 20 includes an image processing unit 21, a display control unit 22, a shooting control unit 23, a condition determination unit 24, a filter processing unit 25, and a recording control unit 26.
The image processing unit 21 in the control unit 20 performs drive control of the image sensor 8, reads an image signal captured and output in the imaging area of the image sensor 8, and generates image data based on the read image signal. Perform image processing. The image processing unit 21 stores the image data generated by the image processing in the buffer memory 12. The display control unit 22 reads the image data generated by the image processing unit 21 and stored in the buffer memory 12 at regular time intervals, and outputs the read image data to the monitor 15 in real time. Here, the fixed time interval is, for example, 1/60 seconds. In this case, 60 frames of image data are displayed on the monitor 15 as a through image by the display controller 22 and recorded in the memory 17 as a moving image. Is done.

In response to the input of a control signal such as a shooting process start command or a shooting process end command for controlling a shooting process based on a user operation input from the operation detection circuit 13, the shooting control unit 23 Output the necessary control signals. When an imaging process start command is input, the imaging control unit 23 drives the optical system 210 and performs an imaging process that generates image data. The imaging control unit 23 performs focusing control, exposure control, zooming, and the like of the optical system 210 via the optical system driving unit 220 according to imaging conditions input in advance by the user.
When the operation of the AF operation unit 13AF of the operation detection circuit 13 is detected, the imaging control unit 23 performs AF control processing. In the AF control process, the imaging control unit 23 determines the distance to the subject based on the measurement result performed by the distance measuring unit 5 while driving the optical system 210, and the focus of the optical system 210 based on the determination result. Adjust the adjustment mechanism. In addition, the subject that has been subjected to the distance measurement process in the AF control process is displayed on the focus point display unit 4 b so that it can be confirmed by the finder 4.
In addition, the photographing control unit 23 performs setting processing for various settings before photographing. For example, when the operation of the selector button 13SEL of the operation detection circuit 13 is detected, the imaging control unit 23 records the input setting information in the nonvolatile memory 11. The information to be recorded includes selection information for selecting a shooting mode, microphone selection information, lens barrel distance information, lens barrel type information, recording control information, and recording control information.

  The shooting conditions selected by the shooting mode are classified according to shooting characteristics corresponding to the shooting target. The setting value corresponding to the shooting condition is set to a value shifted from the standard value to a setting value suitable for the shooting. The shooting conditions selected by the shooting mode are selected from candidates such as “landscape mode”, “portrait mode”, and “insect mode”.

  The shooting conditions selected depending on the distance of the lens barrel 200 are set in the distance ring of the lens barrel 200, and are classified according to the shooting characteristics according to the distance indicated by the distance signal output from the lens barrel 200. The setting value corresponding to the shooting condition is set to a value shifted from the standard value to a setting value suitable for the shooting. In the photographing condition selected by the distance of the lens barrel 200, “far distance” (distance d is farther than the threshold value d1, “d = ∞”), “medium distance” (distance d is closer to the threshold value d1, It is farther than the threshold value d2, and is described as “∞> d> closeness” (d1> d2), and “short distance” (the distance d is closer than the threshold value d2, “d = closeness”). Classified as one of the areas.

  The shooting conditions selected according to the focal length of the lens barrel are classified according to the shooting characteristics according to the focal length of the lens barrel 200. The setting value corresponding to the shooting condition is set to a value shifted from the standard value to a setting value suitable for the shooting. Under the photographing condition selected according to the focal length of the lens barrel 200, the focal length of the lens barrel 200 is any one of three areas: “wide angle (wide)”, “standard (middle)”, and “telephoto (tele)”. are categorized. As an example of the threshold value used for the determination, “wide angle” and “standard” are determined by setting the 35 mm film equivalent focal length to be less than 40 mm as the wide angle, and setting it as “standard” (or “telephoto”). Further, in the determination of “standard” and “telephoto”, when the focal length in terms of 35 mm film is less than 85 mm, “standard” (or “wide angle”) is set, and more than that is set to telephoto.

The shooting conditions selected according to the type of the lens barrel are set in the lens barrel 200, and are classified according to the shooting characteristics according to the type information indicating the type of the lens barrel 200. The setting value corresponding to the shooting condition is set to a value shifted from the standard value to a setting value suitable for the shooting. In the shooting conditions selected according to the type of the lens barrel 200, the type of the lens barrel 200 is classified into three types of “normal lens”, “soft focus lens”, and “macro lens”.
A lens barrel determined as a “normal lens” has standard optical characteristics that are not classified into “soft focus lens” and “macro lens”. A lens barrel that is determined as a “soft focus lens” is a lens that has a function of suppressing the contrast of an image to be captured by actively using spherical aberration, and is mainly used for portrait photography. A lens barrel that is determined as a “macro lens” is a lens barrel that can set a minimum closest distance shorter than a standard range, and is mainly used for photographing near a subject.
A lens barrel that does not output classification information or whose classification type to be output is not one of the above classifications is classified as a lens barrel other than the above three classifications.

  The condition determination unit 24 refers to the set information or the detected information that has been set, makes a determination based on the referenced information, outputs information for selecting a sound signal filtering process during recording, and stores the information in a nonvolatile memory 11 is recorded. In the signal processing of the sound collected by the microphone 41B, the condition determination unit 24 detects that the microphone 41B is connected or refers to setting information indicating that the frequency characteristics of the microphone 41B are not specified. Limit signal processing to remove some frequency components.

  The operation information of the user detected by the operation detection circuit 13 is determined, and the determined information is recorded in the nonvolatile memory 11 and a control instruction for various processes required is output. For example, when an autofocus (AF) operation input is detected by the AF operation means 13AF, an AF control motor that performs AF control of the optical system drive unit 220 in the lens barrel 200 is driven to adjust the optical system 210. AF control is performed.

The filter processing unit 25 performs a noise reduction process by limiting a part of the frequency band in accordance with the user operation information and setting information detected by the condition determination unit 24.
The recording control unit 26 restricts a part of the frequency band by the filter processing unit 25 and records the sound information subjected to the noise reduction process in the buffer memory 12. Further, the recording control unit 26 associates the recorded sound information with the moving image information and writes and records it in the memory 17.

Next, a sound information collection control process for sound information according to the present embodiment will be described.
Prior to the description of the processing, the characteristics of the sound emitted by the subject will be described.
It is said that the frequency band including the main component of human voice is about 80 Hz to several kHz. For example, the frequency band that can be transmitted by telephone is set from 300 Hz to 3.4 kHz, and the main component of human voice can be transmitted within the range of the frequency band.
In addition, it is known that insect calls contain frequency components having characteristics in frequency bands of 4 kHz or more for bells, 5 kHz or more for crickets, and 9.5 kHz or more for grasshoppers. In addition to the above-mentioned insect calls, the sounds having components in a frequency band higher than the frequency band containing the main components of human voice include cicada calls, wind chimes, and dolphin calls. Even if such a sound in a frequency band higher than the frequency band of the telephone is transmitted by the telephone, it cannot be transmitted.

Moreover, it is known that the human audible frequency is about 20 Hz to 20 kHz. Many of the characteristics of the microphone have a frequency band substantially equal to the human audible frequency.
Therefore, by dividing the sound collected by the microphone into a frequency band including the main component of human voice and a frequency band outside the band, it is possible to select a subject that emits the sound.
When shooting a landscape, the voice of a nearby person may be noisy. In this case, by applying a band pass filter (notch filter of a band including the main component of human voice) that removes a frequency band (for example, from 300 Hz to 3.4 kHz) including the main component of human voice. , It can select and record the sound from which the main components of human voice are removed. A filter having this frequency characteristic is referred to as a filter A.

  In portrait photography, the subject is generally a human being. In this case, the human voice can be selectively recorded by applying a bandpass filter in a frequency band (for example, from 300 Hz to 3.4 kHz) including the main component of the human voice. A filter having this frequency characteristic is referred to as a filter B.

  In insect photography, the sound (scream) produced by a subject is often higher than the frequency band that contains the main components of human voice. In this case, by applying a high-pass filter that removes a low-frequency sound including a frequency band including the main component of the human voice, a frequency band including the main component of the human voice (for example, 300 Hz to 3.4 kHz). Can be recorded by emphasizing the sound of a relatively high frequency band. For example, the cutoff frequency of the high pass filter is set to 4 kHz. A filter having this frequency characteristic is referred to as a filter C.

In addition, since human voices, insect calls, etc. are natural sounds, sound components may exist in both the passband and cut-off bands across the cutoff frequency set for each filter. Even in such a case, when the main frequency band is set as a cutoff band by the above filter, the sound component of the main frequency band can be suppressed, so that the noise component included in the desired sound to be recorded can be reduced. It becomes possible to greatly attenuate.
The processing of the filters A, B, and C shown here is performed by the filter processing unit 25, and the characteristics are switched according to the selected condition.

FIG. 2 is a flowchart showing the sound collection control process of the present embodiment.
In the sound collection control process shown in this figure, a process in the case of using an externally connected microphone 41B and a process according to the shooting scene are shown.
In the sound collection control process shown in this flowchart, the condition determination unit 24 of the control unit 20 first determines whether to use the built-in microphone 41A. The determination is made according to the stored setting information with reference to the setting information recorded in the nonvolatile memory 11. The microphone 41A may be set not to be used for reasons such as when the microphone 41B is connected. If it is determined that the microphone 41A is not used, the process of step S108 is selected and the filter process is not performed. The microphone 41B connected to the outside, which is different from the built-in microphone 41A, cannot manage its characteristics, and it is difficult to obtain the effect of performing a desired sound collection control process. Therefore, when the microphone 41B whose frequency characteristics are unknown is connected, the filtering process is not performed (step S100).

  As a result of the determination in step S100, when it is determined that the built-in microphone 41A is used, a shooting mode selected as a shooting condition is set. The shooting mode to be set is selected from “landscape mode”, “portrait mode”, and “insect mode”. The condition determination unit 24 receives information on the shooting mode detected by the selector button 13SEL via the operation detection circuit 13, and records the input information on the shooting mode in the nonvolatile memory 11 (step S101).

  Hereinafter, filter processing characteristics are selected according to the shooting conditions corresponding to the set shooting mode. The condition determination unit 24 determines whether or not the set shooting mode setting is “landscape” (step S102). If the shooting mode setting set by the determination in step S102 is “landscape”, the condition determination unit 24 selects the filter A, and uses the filter A to collect a part of the frequency band of the collected audio information. Limit (step S103). If the shooting mode setting set by the determination in step S102 is not “landscape”, the condition determination unit 24 determines whether it is “portrait” (step S104). If the shooting mode setting set by the determination in step S104 is “portrait”, the condition determination unit 24 selects the filter B, and uses the filter B to collect the collected audio information in a part of the frequency band. (Step S105). If the set shooting mode setting is not “portrait”, the condition determination unit 24 determines whether it is “insect” (step S106). If the shooting mode setting set by the determination in step S106 is “insect”, the condition determination unit 24 selects the filter C, and uses the filter C to collect a part of the frequency band of the collected audio information. Limit (step S107). If the set shooting mode setting is not “insect”, the condition determination unit 24 selects not to perform filter processing in the filter selection (step S108).

Based on the filter processing characteristic selection performed above, the sound collected by the microphone 41A or the microphone 41B is the frequency band of the collected sound depending on the presence or absence of the filter processing and the type of the selected filter. The filter processing unit 25 performs a filtering process for limiting a part of the recording data, and the recording control unit 26 records the data in the buffer memory 12. Then, the recording control unit 26 starts recording in the memory 17 by synchronizing the sound information recorded in the buffer memory 12 with the moving image information photographed at the same time (step S110).
When the recording end input input via the operation detection circuit 13 is detected, the recording control unit 26 ends the recording together with the recording and ends the shooting and sound collection (step S111).

In the camera body 100 of the imaging apparatus 1, the filter processing unit 25 limits at least a part of the frequency components of the sound information collected at the time of shooting according to the frequency characteristics according to the shooting conditions of the shooting. The recording control unit 26 records the sound information whose frequency component is limited by the filter processing unit 25 in association with the moving image information acquired by photographing.
Thereby, the camera body 100 can collect the sound emitted by the imaging target in a noisy environment.
In the camera body 100, the selector button 13SEL selects a shooting mode for shooting based on a user operation. The shooting condition is a shooting mode selected by the selector button 13SEL.
Thereby, the shooting mode setting can be set as a determination condition, and sound collection according to the shooting mode can be easily performed.

(Second Embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The sound information collection control processing of the sound information shown in the second embodiment will be described with respect to different processing forms by the imaging apparatus 1 shown in FIG. Refer to FIG. 1 for the configuration and reference numerals.
In the sound collection control processing shown here, processing according to the distance to the subject will be described.
The characteristics of the shooting conditions can be classified according to the distance to the subject. For example, in the shooting set to “far”, it is used for shooting a distant landscape. The shooting set to “medium distance” is used for shooting a person or the like. In shooting set to “near distance”, it is used for close-up shooting of insects and the like that are shot by a subject. In the present embodiment, the shooting conditions are switched according to the distance to the subject.

FIG. 3 is a flowchart showing the sound collection control process of the present embodiment.
In the sound collection control process shown in this flowchart, first, the imaging control unit 23 of the control unit 20 detects an input AF control instruction, and performs AF functions such as the optical system 210 of the lens barrel 200 and the distance measuring unit 5. Work and measure the distance to the main subject to shoot. The condition determination unit 24 sets the shooting condition based on the distance information that is set and output to the distance ring of the lens barrel 200 as the measurement result. The imaging condition to be set is selected from “long distance”, “medium distance”, and “short distance”. The condition determination unit 24 records information input from the lens barrel 200 in the nonvolatile memory 11 (step S201).

  Hereinafter, filter processing characteristics are selected according to the set shooting conditions. The condition determination unit 24 determines whether or not the set shooting condition setting is “long distance” (step S202). If the shooting condition setting set by the determination in step S202 is “long distance”, the condition determination unit 24 selects the filter A, and uses the filter A to collect a part of the frequency band of the collected audio information. (Step S203). If the shooting condition setting set by the determination in step S202 is not “long distance”, the condition determination unit 24 determines whether it is “medium distance” (step S204). If the shooting condition setting set by the determination in step S204 is “medium distance”, the condition determination unit 24 selects the filter B, and uses the filter B to collect the collected sound information in a part of the frequency band. (Step S205). If the set shooting condition is not “medium distance”, the condition determination unit 24 determines whether it is “short distance” (step S206). If the shooting condition setting set by the determination in step S206 is “short distance”, the condition determination unit 24 selects the filter C, and uses the filter C to collect a part of the frequency band of the collected sound information. (Step S207). If the set photographing condition setting is not “short distance”, the condition determination unit 24 selects not to perform the filter process in the selection of the filter process (step S208).

Based on the characteristic selection of the filter processing performed as described above, the imaging control unit 23 determines whether or not the measurement of the distance to the subject by the AF processing needs to be performed again. If it is determined that the AF process needs to be performed again, the process from step S201 is repeated (step S209).
As a result of the determination in step S209, if it is determined that it is not necessary to perform the AF process again, the sound collected by the microphone 41A is collected according to the presence / absence of the selected filter process and the type of filter. The filter processing unit 25 performs a filtering process for limiting a part of the frequency band of the generated sound, and the recording control unit 26 records it in the buffer memory 12. Then, the recording control unit 26 starts recording in the memory 17 by synchronizing the sound information recorded in the buffer memory 12 with the moving image information photographed at the same time (step S210).
When the recording end input input via the operation detection circuit 13 is detected, the recording control unit 26 ends the recording together with the recording and ends the shooting and sound collection (step S211).

The imaging condition in the present embodiment is a distance indicated by a distance signal output from a lens barrel 200 that can be attached to and detached from the camera body 100.
Thus, the distance of a desired main subject can be measured using the AF mechanism, and the shooting condition setting corresponding to the distance output from the lens barrel 200 as a result can be used as a determination condition, which is obtained by the AF function. Sound can be easily collected according to the distance to the subject.

(Third embodiment)
Hereinafter, different embodiments of the present invention will be described with reference to the drawings.
The sound information collection control process of the sound information shown in the third embodiment will be described with respect to different processing forms by the imaging apparatus 1 shown in FIG. Refer to FIG. 1 for the configuration and reference numerals.
In the sound collection control process shown here, a process according to the focal length will be described.
The characteristics of the shooting conditions can be classified according to the focal length. For example, shooting using a “wide-angle lens” is used for shooting a landscape with a wide angle of view because the focal length is short. The “standard (middle) lens” is used for photographing a person because the focal length is medium. The “telephoto lens” is used for photographing insects and the like because of its long focal length and high magnification. In the present embodiment, shooting conditions are switched according to the focal length of such a lens barrel.

FIG. 4 is a flowchart showing the sound collection control process of the present embodiment.
In the sound collection control process shown in this flowchart, the condition determination unit 24 of the control unit 20 first detects information on the focal length output from the lens barrel 200, and sets shooting conditions based on the detected information. . The imaging condition to be set is selected from “wide angle (wide)”, “standard (middle)”, and “telephoto (tele)”. The condition determination unit 24 records the information in the nonvolatile memory 11 based on the information input from the lens barrel 200 (step S301).

  Hereinafter, filter processing characteristics are selected according to the set shooting conditions. The condition determination unit 24 determines whether or not the set shooting condition setting is “wide angle” (step S302). If the shooting condition setting set by the determination in step S302 is “wide angle”, the condition determination unit 24 selects the filter A, and uses the filter A to collect a part of the frequency band of the collected audio information. Restrict (step S303). If the shooting condition setting set by the determination in step S302 is not “wide angle”, the condition determination unit 24 determines whether it is “standard” (step S304). If the shooting condition setting set by the determination in step S304 is “standard”, the condition determination unit 24 selects the filter B, and uses the filter B to collect a part of the frequency band of the collected audio information. Limit (step S305). If the set shooting condition is not “standard”, the condition determination unit 24 determines whether or not “telephoto” is set (step S306). If the shooting condition setting set by the determination in step S306 is “telephoto”, the condition determination unit 24 selects the filter C, and uses the filter C to collect a part of the frequency band of the collected audio information. Limit (step S307). If the set shooting condition is not “telephoto”, the condition determination unit 24 selects not to perform the filter process in the selection of the filter process (step S308).

Based on the filter processing characteristic selection performed above, the sound collected by the microphone 41A is a part of the frequency band of the collected sound depending on the presence or absence of the selected filter processing and the type of filter. The filter processing unit 25 performs a filtering process for restricting the recording, and the recording control unit 26 records the data in the buffer memory 12. Then, the recording control unit 26 starts recording in the memory 17 by synchronizing the sound information recorded in the buffer memory 12 with the moving image information photographed at the same time (step S310).
When the recording end input input via the operation detection circuit 13 is detected, the recording control unit 26 ends the recording together with the recording and ends the shooting and sound collection (step S311).

The imaging condition in the present embodiment is a focal length output from a lens barrel 200 that can be attached to and detached from the camera body 100.
Thereby, the imaging condition setting according to the focal length output from the lens barrel 200 can be set as the determination condition, and sound collection according to the focal length of the lens barrel 200 can be easily performed.

(Fourth embodiment)
Hereinafter, different embodiments of the present invention will be described with reference to the drawings.
The sound information collection control processing shown in the fourth embodiment will be described with respect to different processing forms by the imaging apparatus 1 shown in FIG. Refer to FIG. 1 for the configuration and reference numerals.
In the sound collection control process shown here, a process according to the lens barrel type will be described.
The characteristics of the lens barrel can be classified according to the lens barrel type. For example, a “soft focus lens” is often used for portrait photography of a person because it can obtain an image with moderately low contrast. The “macro lens” is used when shooting a small subject at an angle that fills the screen. Therefore, it is often used for photographing small animals and insects. In the present embodiment, the shooting conditions are switched according to the usage form of such a lens barrel.

FIG. 5 is a flowchart showing the sound collection control process of the present embodiment.
In the sound collection control process shown in this flowchart, the condition determination unit 24 of the control unit 20 first detects the information of the lens barrel type output from the lens barrel 200, and the lens barrel type based on the detected information. Set the shooting conditions using. The imaging condition to be set is selected from “normal lens”, “soft focus lens”, “macro lens”, and other lenses. The condition determination unit 24 records information input from the lens barrel 200 in the nonvolatile memory 11 (step S401).

  Hereinafter, filter processing characteristics are selected according to the set shooting conditions. The condition determining unit 24 determines whether or not the set shooting condition setting is “normal lens” (step S402). If the shooting condition setting set by the determination in step S402 is “normal lens”, the condition determination unit 24 selects not to perform the filter process in the selection of the filter process (step S403). If the photographing condition set by the determination in step S402 is not “normal lens”, the condition determination unit 24 determines whether it is a “soft focus lens” (step S404). If the shooting condition set by the determination in step S404 is “soft focus lens”, the condition determination unit 24 selects the filter B, and uses the filter B to collect the collected sound information in the frequency band. Part is restricted (step S405). If the set shooting condition is not “soft focus lens”, the condition determination unit 24 determines whether it is “macro lens” (step S406). If the shooting condition setting set by the determination in step S406 is “macro lens”, the condition determination unit 24 selects the filter C, and uses the filter C to collect a part of the frequency band of the collected audio information. (Step S407). When the set shooting condition is not "Macro lens", when notifying the lens type other than "Normal lens", "Soft focus lens" and "Macro lens", or when the lens type cannot be detected, The condition determination unit 24 selects not to perform the filter process in the selection of the filter process (step S408).

Based on the filter processing characteristic selection performed above, the sound collected by the microphone 41A is a part of the frequency band of the collected sound depending on the presence or absence of the selected filter processing and the type of filter. The filter processing unit 25 performs a filtering process for restricting the recording, and the recording control unit 26 records the data in the buffer memory 12. Then, the recording control unit 26 starts recording in the memory 17 by synchronizing the sound information recorded in the buffer memory 12 with the moving image information photographed at the same time (step S410).
When the recording end input input through the operation detection circuit 13 is detected, the recording control unit 26 ends the recording together with the recording and ends the shooting and sound collection (step S411).

The shooting conditions in the present embodiment are lens barrel types output from a lens barrel 200 that can be attached to and detached from the camera body 100.
Thereby, the imaging condition setting according to the lens barrel type output from the lens barrel 200 can be set as the determination condition, and sound collection according to the lens barrel type can be easily performed.

The present invention is not limited to the above embodiments, and can be modified without departing from the spirit of the present invention. In the second embodiment to the fourth embodiment of the present invention, the description of the microphone 41B connected to the outside of the imaging device 1 is omitted. As shown in the first embodiment, when collecting sound using the microphone 41B, it is set not to perform the filter process.
The detection of the input for performing the AF control may be detection of a half-pressed state of the release switch 13b in addition to detection of an operation by the AF operation unit 13AF.
Moreover, although the filter processing shown in the above embodiment has been described as software processing by a program, it may be hardware processing.
Further, the frequency band of each filter is an example, and the cutoff frequency may be changed according to the purpose or the frequency components of the subject and surrounding noise.

DESCRIPTION OF SYMBOLS 1 Imaging device 100 Camera main body 41A Microphone 25 Filter control part 26 Recording control part

Claims (7)

Signal processing means for limiting at least a part of frequency components of sound information collected at the time of shooting according to a frequency characteristic corresponding to the shooting conditions of the shooting;
Recording means for recording the sound information, the frequency component of which is limited by the signal processing means, in association with the moving image information acquired by the photographing;
A camera body characterized by comprising: A selection means for selecting a shooting mode of the shooting based on a user operation;
The shooting conditions are:
The camera body according to claim 1, wherein the camera mode is selected by the selection unit. The shooting conditions are:
The camera body according to claim 1, wherein the camera body has a distance indicated by a distance signal output from a lens barrel detachable from the camera body. The shooting conditions are:
The camera body according to claim 1, wherein the camera body is a focal length output from a lens barrel that can be attached to and detached from the camera body. The shooting conditions are:
The camera body according to claim 1, wherein the camera body is a type of lens barrel that can be attached to and detached from the camera body. The signal processing means includes
The camera according to any one of claims 1 to 5, wherein when the frequency sensitivity characteristic of the sound collecting means for outputting the sound information is unknown, the restriction is prohibited according to the frequency characteristic. body. A camera body according to any one of claims 1 to 6;
An imaging apparatus comprising:

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