JP2010028281A - Camera, noise elimination method and noise elimination program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate noise from recorded sound, even when the noise generated from a noise source is not periodic. <P>SOLUTION: The camera includes: an imaging element 6 for imaging an object image formed via an image forming optical system, and acquiring image signals; a drive means 15 for PWM-driving an actuator 153 for operating a prescribed member inside the camera; a moving image acquisition means 7 for acquiring image signals as moving images; recording means 19 and 20 for recording sound data corresponding to surrounding sound; a first generation means 7 for successively generating a drive pattern that indicates the drive state of the actuator 153 at a prescribed interval of time, when the sound data is recorded during moving image photographing by the recording means 19 and 20; and a second generation means 7 for generating noise pattern data, corresponding to the state of the noise generated by the drive of the actuator 153 using the drive pattern generated in the first generation means 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera, a noise removal method, and a noise removal program for removing drive sound recorded together with voice recording.

Conventionally, in order to reduce noise generated from noise sources with periodicity relative to the sound recorded during movie shooting, the waveform of the noise data is extracted from the recorded sound data and the extracted noise data is used. Digital video cameras are known (for example, Patent Documents 1 and 2).
JP 2005-159877 A JP 2006-81120 A

  However, when the noise generated from the noise source does not have periodicity, there is a problem that it is difficult to reduce the noise from the recorded voice.

According to the first aspect of the present invention, there is provided a camera in which an image pickup device that picks up a subject image formed through an image forming optical system and obtains an image signal, and an actuator that operates a predetermined member inside the camera are PWM driven. Means, moving image acquisition means for acquiring an image signal as a moving image, recording means for recording sound data corresponding to surrounding sound, and driving of the actuator when the sound data is recorded during moving image shooting by the recording means Noise pattern data corresponding to the state of noise generated by driving the actuator is generated using a first generation unit that sequentially generates a drive pattern indicating a state every predetermined period and a drive pattern generated by the first generation unit. And a second generating means.
According to a second aspect of the present invention, in the camera according to the first aspect of the present invention, the camera further includes a removing unit that removes noise from the voice using the voice data recorded by the recording unit and the noise pattern data. And
According to a third aspect of the present invention, in the camera according to the first or second aspect, the first generation unit records the energization pattern for the actuator every predetermined period, and generates the drive pattern based on the energization pattern. Features.
According to a fourth aspect of the present invention, in the camera according to the first or second aspect, the second generation unit records the gain of the circuit included in the recording unit at predetermined intervals, and the recorded gain and the gain Noise pattern data is generated based on a drive pattern in a predetermined cycle corresponding to each predetermined cycle.
According to a fifth aspect of the present invention, in the camera according to any one of the first to fourth aspects, the camera further includes a blur detection unit that detects a blur of the camera, and the driving unit is based on the detected blur. A blur correction member that corrects an image blur on the image sensor by driving a relative position between the imaging optical system and the image sensor in a direction orthogonal to the optical axis is driven.
According to a sixth aspect of the present invention, there is provided a noise removal method in which an image pickup device that picks up a subject image formed through an image forming optical system and acquires an image signal and an actuator that operates a predetermined member inside the camera are PWM-driven. Audio data recorded during video shooting is read and read by a camera comprising: a driving unit that performs video recording, a video acquisition unit that acquires an image signal as a video, and a recording unit that records audio data corresponding to surrounding audio Using sound data, a drive pattern that indicates the drive state of the actuator when sound data is recorded during movie shooting is sequentially generated every predetermined period, and generated by driving the actuator using the generated drive pattern Noise pattern data indicating the state of the noise to be generated, and using the recorded voice data and noise pattern data, And removing the.
The invention according to claim 7 is a noise removal program for executing the noise removal method according to claim 6 by a computer.

  According to the present invention, noise pattern data can be generated to remove noise from speech.

-First embodiment-
A camera according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1A, the camera 1 is provided with a photographing lens 2, a release button 3, a power button 4, and a mode dial 5 for performing a setting operation of a still image shooting mode or a moving image shooting mode as a shooting mode. . The photographing lens 2 includes a focus adjustment lens 2a, another imaging lens 2b, and a shake correction device 15 (FIG. 2) described later. As shown in FIG. 1B, a liquid crystal monitor 17 and operation buttons 18 are provided on the back of the camera 1.

  FIG. 2 is a block diagram illustrating a circuit configuration of the camera according to the embodiment. The camera 1 includes a half-push switch 3a, a full-push switch 3b, a power switch 4a, an image sensor 6, a control circuit 7, an SDRAM 8, a flash memory 9, a memory card interface 11, a shake detection sensor 14, a shake correction device 15, and a liquid crystal monitor 17. And an operation switch 18a, a built-in microphone 19, and a sound processing circuit 20.

  The imaging element 6 is configured by a CCD or CMOS image sensor provided with a plurality of photoelectric conversion elements. The image sensor 6 captures a subject image formed on the imaging surface, and outputs a photoelectric conversion signal (image signal) corresponding to the subject image to the control circuit 7.

  Based on the control program, the control circuit 7 performs a predetermined calculation using signals input from each part constituting the camera 1 and sends a control signal to each part of the camera 1 to control the photographing operation. The control program is stored in a nonvolatile memory (not shown) in the control circuit 7. The control circuit 7 converts the image signal input from the image sensor 6 into a digital image signal, and performs various image processing on the digital image signal to generate image data. Then, the control circuit 7 performs compression processing on the generated image data by a predetermined method such as JPEG, and records it on the memory card 12 in a format such as EXIF. In addition, the control circuit 7 performs a known focus evaluation value calculation based on the imaging signal output from the image sensor 6, and based on the calculation result, a position where the focus evaluation value is maximized with respect to a lens drive circuit (not shown). The focus adjustment lens 2a is moved to.

  The SDRAM 8 is used to temporarily store data during or after image processing, image compression processing, and display image data creation processing. The display image data is generated by the control circuit 7 based on the image data generated by the control circuit 7 based on the output from the image sensor 6 or the image data recorded on the memory card 12. The generated display image data is stored in the SDRAM 8 by the control circuit 7. The flash memory 9 is a non-volatile memory that stores various processing programs for the control circuit 7 to perform operations, for example.

  The control circuit 7 drives the liquid crystal monitor 17 via the LCD drive circuit 171 and displays an image on the liquid crystal monitor 17. Further, various setting menu screens of the camera 1 are displayed on the liquid crystal monitor 17. The setting menu includes, for example, setting of a recording mode for performing sound recording in a moving image shooting mode described later. The recording mode is set by the user operating the operation button 18. The mode dial 5 outputs a signal for instructing moving image shooting or a signal for instructing still image shooting to the control circuit 7 according to a switching operation between moving image shooting and still image shooting by the user.

  When the recording mode is set, the built-in microphone 19 acquires sound during moving image shooting. The audio processing circuit 20 converts the audio signal (analog signal) recorded by the built-in microphone 19 into a digital signal (audio data), and outputs the converted audio data to the control circuit 7. The control circuit 7 connects the audio data in time series to generate audio recording data, and temporarily stores it in a predetermined recording area. The voice recording data is recorded on the memory card 12 as noise-removed voice data after being subjected to noise removal processing described later. The memory card interface 11 is an interface to which the memory card 12 can be attached and detached. The memory card interface 11 is an interface circuit that writes image data to the memory card 12 and reads image data recorded on the memory card 12 based on the control of the control circuit 7. The memory card 12 is a semiconductor memory card such as a compact flash (registered trademark) or an SD card.

  The shake detection sensor 14 is composed of, for example, a gyro sensor or the like, and detects a shake that occurs in the X direction and the Y direction (see FIG. 1) of the main body of the camera 1 at the time of shooting by separating it into pitching and yawing. A shake amount signal representing pitching and yawing detected by the shake detection sensor 14 is output to the control circuit 7. The control circuit 7 performs blur correction by driving a blur correction device 15 described later based on the input blur amount signal.

  The blur correction device 15 includes a shift lens 151, an actuator 153, and a position detection sensor 154. The shift lens 151 can be moved by the actuator 153 within a range defined by an inner wall surface of a drive limiting member (not shown) in a plane parallel to the imaging surface of the imaging device 6, that is, in a plane orthogonal to the optical axis. Is provided.

  The actuator 153 is, for example, a voice coil motor having a coil, a magnet, and a yoke. The actuator 153 generates a driving force by driving with a duty by applying a pulse from the control circuit 7 to move the shift lens 151. As a result, the relative positions of the shift lens 151 and the image sensor 6 in the direction orthogonal to the optical axis of the subject light change, and the subject light that has passed through the photographing lens 2 is refracted in a direction that cancels the blur.

  The position detection sensor 154 is, for example, a magnetic sensor having a magnet and a magnetic detection element, and outputs a voltage corresponding to the position of the shift lens 151 to the control circuit 7. The control circuit 7 detects the position of the shift lens 151 based on the voltage value input from the position detection sensor 154.

-Movie shooting-
An operation of the camera 1 when the control circuit 7 performs moving image shooting and recording when the moving image shooting mode is set by the mode dial 5 and the recording mode is set will be described. When a full-press signal is input from the full-press switch 3b and a start of moving image shooting is instructed, the control circuit 7 causes the image sensor 6 to start acquiring moving image data, and the built-in microphone 19 and the audio processing circuit 20 Start audio data acquisition by. At this time, the control circuit 7 records an energization on / off interval of the actuator 153 every predetermined time as energization duty data in a predetermined recording area in the control circuit 7. The control circuit 7 records the gain state set by the audio processing circuit 20 during recording in a predetermined recording area in the control circuit 7. The gain setting state recorded at this time is recorded at intervals of a predetermined time (PWM driving cycle) in which the actuator 153 is duty-driven by PWM control. While the voice recording is performed, the energization duty data and the gain setting state are continuously recorded every predetermined time.

  When a full-press signal is input from the full-push switch 3b during the above moving image shooting and voice recording and the end of the moving image shooting is instructed, the control circuit 7 acquires image data for the image sensor 6 and the sound from the built-in microphone 19. The data acquisition is terminated, and moving image data and audio recording data are generated. Then, the control circuit 7 generates drive data (duty ratio) indicating the drive pattern of the actuator 153 based on the recorded energization duty data. The control circuit 7 generates a gain coefficient obtained by digitizing the recorded gain setting state. Further, the control circuit 7 generates noise data during recording using the recorded drive duty data and gain coefficient. The control circuit 7 refers to the table TB shown in FIG. 3 when generating noise data. In the table TB, the duty ratio (duty 0% to 100%) and the noise pattern (P000 to P100), that is, the estimated value of noise generated by driving the actuator 153 are associated with each other. This table TB is created on the basis of data measured at the time of manufacturing test, inspection, etc., and is stored in the flash memory 9 in advance.

  It is assumed that the driving of the actuator 153 changes in the duty ratio as follows: duty 10% → duty 12% → duty 9% → duty 10% →. Further, it is assumed that the gain coefficient recorded during recording changes from G1 → G1 → G2 → G2 →... Corresponding to the change of the duty ratio. At this time, the control circuit 7 refers to the table TB and determines that the noise pattern has changed as P10 → P12 → P9 → P10 →. Further, the control circuit 7 uses the gain coefficient change and the noise pattern change to create noise data during voice recording. In this case, the noise due to the drive of the actuator 153 and the gain of the audio processing circuit 20 corresponding to changes in the duty ratio and the gain coefficient is P10 × G1 → P12 × G1 → P9 × G2 → P10 × G2 →. So that it changes over time. Therefore, the control circuit 7 generates noise data by connecting the above P10 × G1, P12 × G1, P9 × G2, P10 × G2,.

  The control circuit 7 subtracts the noise data generated as described above from the temporarily stored voice recording data to remove the noise data from the voice recording data. That is, the noise-removed voice data subjected to the noise removal process is generated by synthesizing the voice recording data and the noise data.

  The operation of the camera 1 will be described with reference to the flowchart shown in FIG. The processing in FIG. 4 is performed by executing a program in the control circuit 7. This program is stored in a memory (not shown), and is activated when a full-press signal is input from the full-press switch 3b when the moving image shooting mode and the recording mode are set.

  In step S101, acquisition of image data by the image sensor 6 is started, and the process proceeds to step S102. In step S102, the energization state for actuator 153 is recorded as energization duty data, and the process proceeds to step S103. In step S103, acquisition of audio data by the built-in microphone 19 and the audio processing circuit 20 is started, and the process proceeds to step S104. In step S104, the gain setting state of the sound processing circuit 20 at the time of sound recording is recorded, and the process proceeds to step S105.

  In step S105, it is determined whether or not moving image shooting has been completed. When a full-press signal is input from the full-press switch 3b and an end of moving image shooting is instructed, an affirmative determination is made in step S105 and the process proceeds to step S106. If the full push signal is not input from the full push switch 3b, a negative determination is made in step S105, and the process returns to step S102.

  In step S106, moving image data is generated using the acquired image data, and audio recording data is generated using the acquired audio data, and the process proceeds to step S107. In step S107, the recording of energization duty data is terminated. Then, drive duty data is generated using the energization duty data, and the process proceeds to step S108. In step S108, a gain coefficient is generated by quantifying the gain setting state of the recorded audio processing circuit 20, and the process proceeds to step S109.

  In step S109, noise data is generated as described above with reference to the table TB using the generated drive duty data and gain coefficient, and the process proceeds to step S110. In step S110, noise data is removed from the audio recording data generated in step S106, thereby generating noise-removed audio data, and a series of processing ends.

According to the first embodiment described above, the following operational effects can be obtained.
(1) The control circuit 7 sequentially generates drive duty data indicating the drive pattern of the actuator 153 for each PWM drive cycle when the sound data is acquired by the built-in microphone 19 and the sound processing circuit 20 during moving image shooting. I did it. The control circuit 7 generates noise data indicating the state of noise generated by driving the actuator 153 using the generated drive duty data, and uses the voice recording data and noise data to generate the actuator 153 from the voice. The noise generated by the drive is removed. Therefore, the noise generated by driving the actuator 153 can be estimated and removed from the sound using the energization duty data. As a result, even when the noise has no periodicity like the actuator 153 of the blur correction device 15, it is possible to acquire high-quality sound from which noise has been removed.

  In addition, noise estimation and noise removal can be performed by the processing of the control circuit 7, so that it is not necessary to remove noise by active silencing as in the prior art. Active silencing refers to collecting noise generated by driving the actuator 153 with a silencing microphone different from the built-in microphone 19 provided in the vicinity of the shake correction device 15, and collecting the collected noise from the sound acquired by the built-in microphone 19. By removing it, noise is removed. Therefore, since active silencing is not required, noise due to the actuator 153 can be removed without newly adding a special configuration such as a silencing microphone, so that the space inside the camera 1 can be secured and the silencing microphone can be added. The cost increase accompanying the can be prevented.

(2) The control circuit 7 records the energization pattern (energization duty data) of the power supplied to the actuator 153 every predetermined period, and generates drive duty data based on the energization pattern. Therefore, since noise data corresponding to the driving state of the actuator 153 can be generated, even if the noise has no periodicity and changes from moment to moment, noise can be removed and high-quality sound can be recorded.

(3) The control circuit 7 generates a gain coefficient obtained by quantifying the gain setting state of the circuit included in the audio processing circuit 20 for each predetermined period, and drives corresponding to the predetermined periods of the gain coefficient and the gain coefficient. Noise data is generated based on the duty data. Therefore, noise components due to the gain state of the audio processing circuit 20 can also be removed, so that the quality of recorded audio can be improved.

-Second Embodiment-
A camera according to the second embodiment of the present invention will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and different points will be mainly described. Points that are not particularly described are the same as those in the first embodiment. This embodiment is different from the first embodiment in that noise data and noise-removed audio data are generated by a computer such as a PC.

  FIG. 5 shows a main configuration of the camera 1 according to the second embodiment and a computer connected to the camera 1. The camera 1 further includes an external interface 21. The external interface 21 is an interface for performing data communication with an external device such as the computer 30 via a predetermined cable or wireless transmission path.

  In the present embodiment, the computer 30 performs a noise removal process for removing noise from the voice recording data acquired by the camera 1. The computer 30 includes a control circuit 31, a hard disk 32, an external interface 33, a flash memory 34, and an operation unit 35. The control circuit 31 inputs a signal output from each block, performs a predetermined calculation, and outputs a control signal based on the calculation result to each block.

  The hard disk 32 stores image data downloaded from the camera 1, audio recording data, and noise recording information data described later. The external interface 212 performs data communication with an external device such as a camera via a predetermined cable or a wireless transmission path. The flash memory 34 stores a table TB in which a duty ratio (duty 0% to 100%) and a noise pattern (P000 to P100), that is, an estimated value of noise generated by driving the actuator 153 are associated with each other. Yes. The operation unit 35 is operated when the user causes the computer 30 to perform noise removal processing, and outputs a noise removal instruction signal.

Next, operations of the camera 1 and the computer 30 in the present embodiment will be described.
-Camera 1
The control circuit 7 of the camera 1 generates drive duty data and a gain coefficient in the same manner as described in the first embodiment. Then, the control circuit 7 generates noise recording information data in which the generated drive duty data and gain coefficient are combined into one. In the noise recording information data, the drive duty data and the gain coefficient at a predetermined time during which the actuator 153 is duty-driven are associated with each other for each predetermined time. Then, the control circuit 7 records the generated audio recording data and noise recording information data on the memory card 12. When the camera 1 is connected to the computer 30 via the external interface 21 and receives a data transmission request signal from the computer 30, the control circuit 7 reads out the voice recording data and the noise recording information data from the memory card 12, and the computer 1 To 30.

  The operation of the camera 1 will be described with reference to the flowchart shown in FIG. The processing in FIG. 6 is performed by executing a program in the control circuit 7. This program is stored in a memory (not shown), and is activated when a full-press signal is input from the full-press switch 3b when the moving image shooting mode and the recording mode are set.

  Each processing from step S201 (moving image shooting start) to step S208 (gain coefficient generation) is the same as each processing from step S101 (moving image shooting start) to step S108 (gain coefficient generation) in FIG. In step S209, noise recording information data is generated by associating the driving duty data with the gain coefficient, and the noise recording information data and the audio recording data are associated with each other and recorded on the memory card 12. A series of processing ends.

-Computer 30-
When it is detected that the camera 1 is connected via the external interface 33 and a noise removal instruction signal is input from the operation unit 35, the control circuit 31 transmits noise recording information data and audio recording data to the camera 1. Send the requested transmission request signal. Then, the control circuit 31 reads the noise recording information data and the audio recording data transmitted from the camera 1 in response to the transmission request signal, and stores them in the hard disk 32.

  The control circuit 31 uses the drive duty data and the gain coefficient in the noise recording information data read into the hard disk 32 and refers to the table TB stored in the flash memory 34 as described in the first embodiment. Noise data is generated in the same manner as in the case. Then, the control circuit 31 subtracts the noise data from the read voice recording data and removes the noise data from the voice recording data. That is, the noise-removed voice data subjected to the noise removal process is generated by synthesizing the voice recording data and the noise data.

  The operation of the computer 30 will be described with reference to the flowchart shown in FIG. The processing in FIG. 7 is performed by executing a program in the control circuit 31. This program is stored in a memory (not shown), is connected to the camera 1, and is activated when a noise removal instruction signal is input from the operation unit 35.

  In step S301, a transmission request signal is transmitted to the camera 1 via the external interface 33, and the process proceeds to step S302. In step S302, noise recording information data is read from the camera 1, stored in the hard disk 32, and the process proceeds to step S303. In step S303, noise data is generated with reference to the table TB using the drive duty data and gain coefficient in the read noise recording information data, and the process proceeds to step S304.

  In step S304, the audio recording data is read from the camera 1 and the process proceeds to step S305. In step S305, noise data is removed from the read voice recording data to generate noise-removed voice data, and the series of processes is terminated.

According to the second embodiment described above, the following operational effects can be obtained.
With reference to the table TB stored in the flash memory 34 of the computer 30, noise data is generated from the noise recording information data read from the camera 1, and noise generated by driving the actuator 153 of the camera 1 is removed from the sound. I did it. Therefore, even if the table TB is not stored in the camera 1, noise data can be generated by post-processing to remove noise, so that the capacity of the flash memory 9 of the camera 1 can be secured. Further, since the processing capability of the control circuit 31 in the computer 30 is generally higher than the processing capability of the control circuit 7 of the camera 1, it is faster than generating noise data and generating noise-removed audio data inside the camera 1. Can be processed. Furthermore, the processing load of the camera 1 can be reduced.

The camera 1 according to the embodiment described above can be modified as follows.
(1) Not only noise generated by driving the actuator 153 of the blur correction device 15, but noise generated by an actuator such as a focus motor driving the focus adjustment lens 2a or a zoom motor driving a zoom lens (not shown) is removed. The present invention can also be applied to cases. In this case as well, a table in which drive duty data of the focus motor or zoom motor is associated with a noise pattern may be stored in the flash memory 9 in advance.

(2) The necessity of generation of noise data and noise-removed audio data by the control circuit 7 of the camera 1 may be selectable by the user. In this case, the user may select whether or not the noise removal process is necessary, for example, from a setting menu displayed on the liquid crystal monitor 17. As a result, when the noise generated inside the camera 1 is relatively small with respect to surrounding sounds and the necessity for noise removal is low, the noise removal processing is not performed and the processing load on the control circuit 7 is reduced. be able to.

(3) Instead of driving the shift lens 151, the image pickup device 6 is driven to change the relative position of the photographing lens 2 and the image pickup device 6 in the direction perpendicular to the optical axis of the subject light, thereby correcting the image blur. You may do it.

(4) When the control program of the camera 1 or the computer 30 is upgraded, support for existing users can be implemented via the Internet or via a portable recording medium. The program shown in FIG. 4, FIG. 6, or FIG. 7 can be applied to such version upgrade software.

  In addition, the present invention is not limited to the above-described embodiment as long as the characteristics of the present invention are not impaired, and other forms conceivable within the scope of the technical idea of the present invention are also within the scope of the present invention. included.

1 is an external view of a camera according to an embodiment of the present invention. 1 is a block diagram for explaining a main configuration of a camera according to a first embodiment. The figure which shows an example of table TB The flowchart explaining the noise removal operation | movement of the camera by 1st Embodiment. FIG. 3 is a block diagram for explaining a main configuration of a camera and a computer according to a second embodiment. Flowchart for explaining the operation of the camera according to the second embodiment The flowchart explaining operation | movement of the computer by 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 6 ... Imaging device 7 ... Control circuit 14 ... Blur detection sensor 15 ... Blur correction device 19 ... Built-in microphone 20 ... Audio | voice processing circuit 153 ... Actuator

Claims (7)

An image sensor that captures an image of a subject imaged via an imaging optical system to obtain an image signal;
Drive means for PWM driving an actuator for operating a predetermined member inside the camera;
Moving image acquisition means for acquiring the image signal as a moving image;
Recording means for recording audio data corresponding to the surrounding audio;
First generation means for sequentially generating a drive pattern indicating a drive state of the actuator at predetermined intervals when audio data is recorded during moving image shooting by the recording means;
A camera comprising: second generation means for generating noise pattern data corresponding to a state of noise generated by driving the actuator, using the drive pattern generated by the first generation means. The camera of claim 1,
A camera, further comprising: removal means for removing the noise from the voice using the voice data recorded by the recording means and the noise pattern data. The camera according to claim 1 or 2,
The camera according to claim 1, wherein the first generation unit records an energization pattern for the actuator at predetermined intervals, and generates the drive pattern based on the energization pattern. The camera according to claim 1 or 2,
The second generation unit records a gain of a circuit included in the recording unit for each predetermined period, and the recorded gain and the drive pattern in the predetermined period corresponding to each predetermined period of the gain. The noise pattern data is generated based on the above. The camera according to any one of claims 1 to 4,
It further comprises a shake detection means for detecting camera shake,
The drive means corrects image blur on the image sensor by changing a relative position between the imaging optical system and the image sensor in a direction orthogonal to an optical axis based on the detected blur. A camera that drives a correction member. An image sensor that captures an image of a subject imaged via an imaging optical system to acquire an image signal, a drive unit that PWM drives an actuator that operates a predetermined member inside the camera, and the image signal is acquired as a moving image. Read the audio data recorded during video shooting by a camera comprising a video acquisition means and a recording means for recording audio data corresponding to the surrounding audio;
Using the read audio data, a drive pattern indicating a drive state of the actuator when audio data is recorded during moving image shooting is sequentially generated every predetermined period,
Using the generated drive pattern, generate noise pattern data indicating the state of noise generated by driving the actuator,
A noise removing method, wherein the noise is removed from the voice using the recorded voice data and the noise pattern data. An image sensor that captures an image of a subject imaged via an imaging optical system to acquire an image signal, a drive unit that PWM drives an actuator that operates a predetermined member inside the camera, and the image signal is acquired as a moving image. A reading process for reading the audio data recorded during moving image shooting by a camera including a moving image acquisition unit and a recording unit that records audio data corresponding to surrounding audio;
A first generation process for sequentially generating a driving pattern indicating a driving state of the actuator when the audio data is recorded during moving image shooting at predetermined intervals using the read audio data;
A second generation process for generating noise pattern data indicating a state of noise generated by driving the actuator, using the generated drive pattern;
A noise removal program, wherein a removal process for removing the noise from the voice is executed by a computer using the recorded voice data and the noise pattern data.

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