JP2011114406A - Imaging apparatus, imaging method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus, an imaging method and a program, capable of removing noise accompanying an optical zoom operation from recorded sound and/or output sound. <P>SOLUTION: The imaging apparatus includes: an imaging portion 15 for performing the optical zoom operation corresponding to a zoom instruction from a user; a sound signal supply portion (main control portion 11) for supplying sound signals inputted from a microphone 35 to a recorder and/or an output device; a sound signal determination portion (main control portion 11) for determining the input condition of the sound signals; an operation signal determination portion (main control portion 11) for determining whether or not the operation signals of the zoom instruction are inputted; and a zoom operation adjustment portion (main control portion 11) for adjusting the point of time of the optical zoom operation corresponding to the input condition of the sound signals when the operation signals of the zoom instruction are inputted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an imaging apparatus, an imaging method, and a program.

  In an imaging apparatus such as a still camera, a video camera, or a surveillance camera, motor sound or the like accompanying an optical zoom operation may be collected by a microphone as noise (hereinafter also referred to as zoom noise) and recorded and / or output. is there.

  For this reason, digital zoom is used instead of optical zoom, or the operation speed of optical zoom is slowed to reduce the generation of noise. In addition, zoom noise is recorded in advance, and noise superimposed on the target sound to be recorded and / or output is removed by signal processing to make the zoom noise inconspicuous (Patent Document 1 below). 2).

JP 2006-262241 A JP 2000-4494 A

  However, it is generally known that if noise superimposed on the target voice is removed by signal processing, the target voice is distorted and the recording quality and / or output quality is reduced.

  Therefore, the present invention is intended to provide an imaging apparatus, an imaging method, and a program capable of removing noise associated with an optical zoom operation from recorded audio and / or output audio.

  According to the first aspect of the present invention, in response to a zoom instruction from a user, an imaging unit that performs an optical zoom operation, and an audio signal that supplies an audio signal input from a microphone to a recording device and / or an output device A supply unit, an audio signal determination unit that determines an input state of an audio signal, an operation signal determination unit that determines whether an operation signal for zoom instruction is input, and an audio signal when an operation signal for zoom instruction is input An image pickup apparatus is provided that includes a zoom operation adjustment unit that adjusts the operation time point of the optical zoom in accordance with the input state.

  According to this configuration, when the zoom instruction operation signal is input, the operation time point of the optical zoom is adjusted according to the input state of the audio signal. Accordingly, by adjusting the operation time point of the optical zoom to the time point when the target sound is not input, it is possible to prevent the recording quality and / or the output quality from being deteriorated due to the distortion of the target sound due to noise removal.

  The voice signal determination unit determines a voiced segment or a speech segment from the input state of the voice signal, and the zoom operation adjustment unit detects a voice when a zoom instruction operation signal is input to the voiced segment or the speech segment. The operation time point of the optical zoom may be adjusted so that the imaging unit performs the optical zoom operation after the section or the speech section ends.

  In addition, the zoom processing unit further includes a zoom processing unit that performs digital zoom processing on an imaging signal input from the imaging unit, and the zoom processing unit receives a zooming operation signal when the zoom instruction operation signal is input to the sounding period or the speaking period. Alternatively, digital zoom processing may be performed.

  Further, when adjusting the operation time of the optical zoom, the audio signal supply unit does not need to supply the audio signal input from the microphone to the recording device and / or the output device at the time of the optical zoom operation. Instead of the audio signal, comfort noise may be supplied to the recording device and / or the output device.

  In addition, the audio signal determination unit determines a voiced section or a speech section in consideration of noise associated with the optical zoom operation, and the zoom operation adjustment unit determines that the voiced section or the speech section is determined during the optical zoom operation. The operation of the optical zoom may be adjusted so that the imaging unit temporarily stops the optical zoom operation. Further, the zoom operation adjustment unit may further adjust the operation of the optical zoom so that the imaging unit performs the optical zoom operation after the end of the sound period or the speech period.

  The voice signal determination unit may determine a section in which the signal-to-noise ratio of the voice signal is greater than or equal to a threshold as a voiced section or an utterance section, and a section in which the voice detection value of the voice signal is greater than or equal to the threshold. You may determine as an area.

  According to a second aspect of the present invention, the method includes a step of supplying an audio signal input from a microphone to a recording device and / or an output device, wherein the step includes a step of determining an input state of the audio signal. Determining whether an operation signal for zoom instruction is input, and adjusting an operation time point of the optical zoom according to an input state of the audio signal when the operation signal for zoom instruction is input. An imaging method is provided.

  According to the third aspect of the present invention, there is provided a program for causing a computer to execute the imaging method according to the second aspect. Here, the program may be provided using a computer-readable recording medium or may be provided via communication means.

  As described above, according to the present invention, it is possible to provide an imaging apparatus, an imaging method, and a program capable of removing noise associated with an optical zoom operation from recorded audio and / or output audio.

It is a block diagram which shows the main function structures of the still camera which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the still camera which concerns on 1st Embodiment. It is a schematic diagram which shows the processing result by the still camera which concerns on 1st Embodiment. It is a schematic diagram which shows the processing result by the still camera which concerns on 2nd Embodiment. It is a schematic diagram which shows the processing result by the still camera which concerns on 3rd Embodiment. It is a schematic diagram which shows the processing result by the still camera which concerns on 4th Embodiment.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

[1. Still camera configuration]
First, the still camera 10 according to the embodiment of the present invention will be described. FIG. 1 is a block diagram showing a main functional configuration of a still camera 10 according to an embodiment of the present invention. In the following, the case where the present invention is applied to the still camera 10 will be described as an example. However, the present invention can be similarly applied to other imaging apparatuses such as a video camera and a surveillance camera.

  As shown in FIG. 1, the still camera 10 includes a main control unit 11, an operation unit 13, an imaging unit 15, a lens control unit 17, a shutter control unit 19, an iris control unit 21, a timing generation unit 23, and an imaging signal conversion unit 25. The imaging signal processing unit 27, the image processing unit 29, the display control unit 31, and the display unit 33 are provided. The still camera 10 includes a microphone 35, an audio signal conversion unit 37, an audio signal processing unit 39, an audio processing unit 41, a speaker 43, a memory control unit 45, a memory 47, a card control unit 49, and a memory card 51.

  The main control unit 11 executes a program stored in the memory 47 and controls each unit of the still camera 10. The operation unit 13 converts an instruction input from the user through a recording start button, a zoom button, and the like (not shown) into an operation signal and supplies the operation signal to the main control unit 11. The imaging unit 15 includes a lens group 15a (including a zoom lens), a shutter 15b, an iris 15c, and an imaging element 15d such as a CCD. The imaging unit 15 forms an optical image of the subject on the imaging element 15d through the lens group 15a, the shutter 15b, and the iris 15c, converts the image into an imaging signal, and supplies the imaging signal to the imaging signal conversion unit 25.

  The lens control unit 17, the shutter control unit 19, and the iris control unit 21 control the lens group 15a, the shutter 15b, and the iris 15c, respectively. The timing generation unit 23 supplies a timing signal to the imaging element 15d and the imaging signal conversion unit 25, and controls imaging timing. The imaging signal conversion unit 25 performs signal amplification, A / D conversion, white balance adjustment, and the like on the imaging signal supplied from the imaging element 15 d and supplies the imaging signal processing unit 27 with the signal.

  The imaging signal processing unit 27 performs color space conversion, noise removal, and the like on the imaging signal, generates image data, and supplies the image data to the main bus 61. The image processing unit 29 performs enlargement, reduction, encoding, decoding, and the like on the image data. The display control unit 31 converts the image data into an output signal, and controls the image output by the display unit 33 such as a liquid crystal display. Further, the display control unit 31 combines the image data expanded in the frame memory in the memory 47, the live moving image data, and the image data of the GUI area generated by the main control unit 11.

  The microphone 35 collects sound around the still camera 10, converts it into an audio signal, and supplies the audio signal to the audio signal conversion unit 37. The audio signal conversion unit 37 performs signal amplification, A / D conversion, and the like on the audio signal, and supplies the audio signal processing unit 39 with the signal. The audio signal processing unit 39 performs various signal processing on the audio signal, generates audio data, and supplies the audio data to the main bus 61. The audio processing unit 41 performs encoding, decoding, etc. on the audio data and supplies the encoded audio data to the main bus 61. The speaker 43 converts audio data into an output signal and outputs the audio to the outside.

  The memory control unit 45 controls writing / reading of data to / from the memory 47 under the control of the main control unit 11 in order to temporarily store image data and audio data. The card control unit 49 controls writing / reading of data to / from the memory card 51 under the control of the main control unit 11 in order to store image data and audio data. The image data and audio data are encoded / decoded by the image processing unit 29 and the audio processing unit 41, and are written / read to / from the memory 47 and the memory card 51.

  The still camera 10 has an optical zoom function and a digital zoom function. When starting the optical zoom operation, the main control unit 11 sets operation conditions such as the target magnification of the optical zoom of the lens group 15a, the speed of the shutter 15b (exposure time of the image sensor 15d), and the iris amount of the iris 15c. Then, the main control unit 11 controls the lens control unit 17, the shutter control unit 19, and the iris control unit 21 so that the imaging unit 15 is driven according to the operating conditions. Further, when starting the digital zoom operation, the main control unit 11 sets operation conditions such as a target magnification of the digital zoom and an imaging range of the image sensor 15d. Then, the main control unit 11 controls the image processing unit 29 so that the image data is enlarged according to the operating conditions.

  Based on the audio signal supplied to the audio signal processing unit 39, the main control unit 11 determines the input state of the audio signal, in particular, a voiced section or an utterance section. Here, the voiced section or the utterance section means a section in which the target voice to be recorded and / or output is collected. Although the details will be described later, the main control unit 11 controls the optical zoom operation and the digital zoom operation, and particularly adjusts the operation time point of the optical zoom according to the input state of the audio signal.

  When the still camera 10 is activated, the main control unit 11 waits for an operation signal to be input through the operation unit 13. When the user operates the recording start button, the main control unit 11 receives an operation signal indicating recording start, and controls each unit to start recording operation of image data and audio data. In the still camera 10, the recording operation of the image data and the audio data is continued until the user operates the recording end button. That is, the still camera 10 records live moving images and live audio.

  In the imaging unit 15, a light image of the subject is formed on the imaging element 15d and converted into an imaging signal. The imaging signal is processed at a constant cycle and supplied to the main bus 61 as image data. The image data is encoded and written in the memory 47 and displayed on the display unit 33 as an image.

  The microphone 35 collects sound around the still camera 10 and converts it into an audio signal. The audio signal is processed at a constant cycle and supplied to the main bus 61 as audio data. The audio data is encoded and written to the memory 47.

  When the user operates the data save button, the main control unit 11 controls the memory control unit 45 and the card control unit 49 so that the data temporarily stored in the memory 47 is stored in the memory card 51.

  In the following, a case where image data and audio data are recorded (stored) will be described. However, image data and audio data may be output to an external device through an output port (not shown) instead of recording / in combination with recording.

[2. Still camera operation]
Next, first to fifth embodiments relating to the operation of the still camera 10 of the present invention will be described. In addition, the description which overlaps with each embodiment is abbreviate | omitted.

<First Embodiment>
First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a flowchart showing the operation of the still camera 10. FIG. 3 is a schematic diagram illustrating a processing result by the still camera 10 according to the first embodiment.

  During the data recording operation, the main control unit 11 determines the input state of the audio signal input from the microphone 35. When the user operates the zoom button, the main control unit 11 sets an operation condition such as a zoom target magnification according to the input state of the operation signal. The main control unit 11 determines whether or not the optical zoom operation is possible according to the input state of the audio signal.

  Here, when it is determined that the optical zoom operation is possible, the main control unit 11 causes the imaging unit 15 to perform the optical zoom operation according to the operation condition. On the other hand, when it is determined that the optical zoom operation is impossible, the main control unit 11 adjusts the operation time of the optical zoom and causes the image processing unit 29 to perform the digital zoom operation according to the operation conditions.

  Below, operation | movement of the still camera 10 which concerns on 1st Embodiment is demonstrated in detail. As shown in FIG. 2, during the data recording operation, the main control unit 11 determines the input state of the audio signal based on the audio signal supplied to the audio signal processing unit 39. The input state of the audio signal may be determined for each sample of the sampling frequency (for example, 16 kHz) or may be determined for each frame (for example, 512 samples).

  In order to determine the input state of the audio signal, the main control unit 11 estimates the noise level n (t) and the signal level s (t) of the audio signal by the following equations 1 to 3, and A signal noise ratio SNR is calculated (step S101). Note that the noise level n (t) and the signal level s (t) are not limited to the method using the equations 1 to 3, but may be estimated by a method using speech detection, a method based on the minimum value of the input signal, or the like. Good.

  Here, n (t) and s (t) are the noise level and signal level estimates at time t, and m (t) is the amplitude of the audio signal input from the microphone 35 at time t. Further, α and β are constants that satisfy the relationship of 0 <β <α <1, and γ and δ are constants that satisfy the relationship of 0 <γ <δ <1.

  From the relationship β <α, the noise level n (t) is less likely to reflect the current amplitude m (t) when the noise level tends to increase, and the current amplitude when the noise level tends to decrease. m (t) is easily reflected. Further, from the relationship of γ <δ, the signal level s (t) is less likely to reflect the current amplitude m (t) when the signal level tends to increase, and the current level when the signal level tends to decrease. The amplitude m (t) is easily reflected. As a result, the noise level n (t) and the signal level s (t) can be estimated in a state where the influence of the non-stationary sound is difficult.

  The main control unit 11 determines the operation state of the zoom button based on the operation signal input from the operation unit 13 (step S103). When the zoom button is operated, the main control unit 11 updates the optical zoom target magnification in accordance with the operation status (step S105).

  The main control unit 11 determines whether or not the current magnification of the optical zoom is less than the target magnification (step S107). If the condition is met, the process of step S109 is performed. If the condition is not met, the process of step S115 is performed.

  When the current magnification of the optical zoom is less than the target magnification, the main control unit 11 determines whether the SNR calculated in step S101 is less than a predetermined threshold T (step S109). Here, the threshold T is set in advance as a value capable of determining a voiced section or a speech section. When the condition is met, the main control unit 11 causes the imaging unit 15 to perform an optical zoom operation (telephoto side) (step S111). When the condition is not met, the image processing unit 29 performs a digital zoom operation (telephoto side). (Step S113).

  If the condition is not met in the process of step S107 (when the current magnification of the optical zoom is equal to or greater than the target magnification), the main control unit 11 determines whether the current magnification of the optical zoom is equal to the target magnification (step S115). ). When the condition is met (when the optical zoom has reached the target magnification), the zoom operation is not performed (step S117), when the condition is not met (when the optical zoom exceeds the target magnification), the imaging unit 15 is caused to perform an optical zoom operation (wide angle side) (step S119).

  According to the above flow, when a zoom instruction is input in a voiced section or a speech section, the operation time point of the optical zoom is adjusted, and a digital zoom operation is performed instead of the optical zoom operation (step S113). Then, after the end of the voiced section or the speech section, an optical zoom operation in which the operation time is adjusted is performed (step S111). In addition, when performing the optical zoom operation in which the operation time is adjusted, the previously performed digital zoom operation is cancelled.

  FIG. 3 shows the processing according to the first embodiment in contrast to the conventional processing. In the figure, an audio signal corresponding to audio data to be recorded is shown as Vr. Conventionally, as shown in the state ST-0, when an optical zoom operation is performed at the time of inputting a target sound, the zoom noise Nz is picked up and superimposed on the target sound, and the zoom noise Nz is recorded. If the noise superimposed on the target voice is to be removed by signal processing, the target voice is distorted and the recording quality is deteriorated.

  On the other hand, according to the present embodiment, as shown in the state ST-1, the optical zoom operation is performed so that the optical zoom operation is performed when the target sound is not input (however, stationary noise is input). The operating time of is adjusted. In addition, a digital zoom operation is performed instead of the optical zoom operation.

  As a result, it is possible to prevent the recording quality from being deteriorated due to distortion of the target sound accompanying noise removal. Also, by performing the digital zoom operation, it is possible to prevent the recording quality of the image data from being lowered.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic diagram illustrating a processing result by the still camera 10 according to the second embodiment.

  FIG. 4 shows the processing according to the second embodiment in contrast to the processing according to the first embodiment. According to the first embodiment, as shown in the state ST-1, an optical zoom operation is performed in a silent section or a non-speech section, so that the time point when the zoom noise Nz is generated is the time point when the target voice is not input. Can move. By the way, it is considered that only stationary noise is collected by the microphone 35 in addition to the zoom noise Nz in the silent section or the non-speech section.

  For this reason, as shown in the state ST-2, the operation time point of the optical zoom is adjusted, and the zoom noise Nz is picked up during the silent interval or the non-speech interval (where stationary noise exists). The sound signal input from the microphone 35 may be silenced. Specifically, for example, the supply of audio data from the audio signal processing unit 39 to the main bus 61 may be restricted, or the audio data may be converted to data during silence. As a result, it is possible to record audio data that does not include the zoom noise Nz even in a silent section or a non-speech section.

<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic diagram illustrating a processing result by the still camera 10 according to the third embodiment.

  FIG. 5 shows the processing according to the third embodiment in contrast to the processing according to the second embodiment. According to the second embodiment, as shown in the state ST-2, the sound noise is silenced to suppress the zoom noise Nz, but the stationary noise is also suppressed. As a result, a section in which stationary noise is recorded and a section in which no stationary noise is recorded are generated, which may make the user feel uncomfortable when reproducing audio data.

  For this reason, as shown in the state ST-3, data of the comfort noise Nc may be recorded over a period during which the sound signal is silenced. Here, the comfort noise Nc is generated by reflecting the characteristics of stationary noise in the usage environment of the still camera 10. As the stationary noise characteristic, for example, the result of estimating the noise level for each frequency band using Equation 1 is applied.

  Specifically, while the still camera 10 is activated, the comfort noise Nc data is periodically generated, and the data may be updated so that the latest data can be used. Then, the audio data supplied from the audio signal processing unit 39 to the main bus 61 may be converted into comfort noise Nc data. As a result, it is possible to suppress the zoom noise Nz and suppress the level fluctuation of the stationary noise.

<Fourth Embodiment>
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram illustrating a processing result by the still camera 10 according to the fourth embodiment.

  FIG. 6 shows the processing according to the fourth embodiment in contrast to the processing according to the first embodiment. According to the first embodiment, as shown in the state ST-1 ′, when the target sound Vt is input during the optical zoom operation, the zoom noise Nz is collected so as to be superimposed on the target sound Vt. Since noise is superimposed on the target voice Vt, it is not possible to appropriately determine a voiced section or an utterance section from the input state of the voice signal.

For this reason, it is conceivable that the noise level n ₀ (t) at the time of the optical zoom operation is recorded in advance and used for determination of a voiced section or a speech section. That is, the main control unit 11 calculates the SNR using the above-described equation 3 other than during the optical zoom operation, and calculates the SNR using the following equation 4 during the optical zoom operation. As a result, even during the optical zoom operation, it is possible to appropriately determine the voiced section or the speech section from the input state of the audio signal.

  Note that the voiced section or speech section at the time of the optical zoom operation is not limited to the method using the noise level at the time of the optical zoom operation. For example, the method using the threshold T that is different between the operation time and the non-operation time of the optical zoom, SNR It may be determined by a method of obtaining and weighted average for each frequency band.

  Then, in the process of step S111 shown in FIG. 2, the voiced section or the speech section is determined during the optical zoom operation, and when the voiced section or the speech section is determined, as shown in the state ST-4, the optical zoom operation is performed. May be temporarily stopped. Furthermore, the operation time point of the optical zoom may be adjusted so that the optical zoom operation is performed after the end of the voiced section or the speech section. Thereby, even if the target sound is input during the optical zoom operation, it is possible to prevent the recording quality of the sound data from being deteriorated.

<Fifth Embodiment>
Next, a fifth embodiment of the present invention will be described.

  In the processing according to the fifth embodiment, a voiced section or an utterance section is determined using the SNR of the voice signal, and the propriety of the optical zoom operation is determined. However, the voiced section or the speech section may be determined by voice detection instead of using the SNR.

  Specifically, the main control unit 11 calculates the spectral flux according to the following equation 4. Note that the voice detection is not limited to the method using the spectral flux, and may be performed by a method using autocorrelation, a method using LPC, or the like.

  Here, X (t, f) represents the frequency of occurrence of the spectral component of frequency f in the frame at time t. As shown in Equation 5, the spectral flux F (t) is defined as the square root of the square sum of the difference in the frequency of occurrence of spectral components between the frame at time t and the frame at time t−1.

  It is known that the spectrum flux F (t) is large because the time variation of the spectrum component is large in the case of the target speech, and is small because the time variation of the spectrum component is small in the case of stationary noise. Therefore, the spectral flux F (t) is calculated in the process of step S101 shown in FIG. 2, and the threshold value is processed in the process of step S109, so that the voiced section or the utterance section is determined by voice detection instead of using the SNR. be able to.

[3. Summary]
As described above, according to the still camera 10 according to the embodiment of the present invention, when a zoom instruction operation signal is input, the operation time point of the optical zoom is adjusted according to the input state of the audio signal. Accordingly, by adjusting the operation time point of the optical zoom to the time point when the target sound is not input, it is possible to prevent the recording quality and / or the output quality from being deteriorated due to the distortion of the target sound due to noise removal.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the description of the above embodiment, the case where audio data is supplied to the card memory has been described. However, the audio data may be supplied to an external recording device such as a hard disk instead of the card memory. Further, the audio data may be supplied to an output device such as an external speaker instead of or in addition to recording by the recording device.

DESCRIPTION OF SYMBOLS 10 Still camera 11 Main control part 13 Operation part 15 Imaging part 17 Lens control part 19 Shutter control part 21 Iris control part 23 Timing generation part 25 Imaging signal conversion part 27 Imaging signal processing part 29 Image processing part 31 Display control part 33 Display part 35 Microphone 37 Audio Signal Conversion Unit 39 Audio Signal Processing Unit 41 Audio Processing Unit 43 Speaker 45 Memory Control Unit 47 Memory 49 Card Control Unit 51 Memory Card

Claims (11)

In response to a zoom instruction from a user, an imaging unit that performs an optical zoom operation;
An audio signal supply unit for supplying an audio signal input from a microphone to a recording device and / or an output device;
An audio signal determination unit for determining an input state of the audio signal;
An operation signal determination unit that determines whether an operation signal for the zoom instruction is input;
When an operation signal of the zoom instruction is input, a zoom operation adjustment unit that adjusts an operation time point of the optical zoom according to an input state of the audio signal
An imaging apparatus comprising: The voice signal determination unit determines a voiced section or a speech section from the input state of the voice signal,
The zoom operation adjusting unit is configured so that, when an operation signal for the zoom instruction is input to the sounding section or the utterance section, the imaging unit performs an optical zoom operation after the end of the sounding section or the utterance section. The imaging apparatus according to claim 1, wherein an operation time point of the optical zoom is adjusted. A zoom processing unit that performs digital zoom processing on an image pickup signal input from the image pickup unit;
The imaging apparatus according to claim 2, wherein the zoom processing unit performs a digital zoom process on the sounding section or the utterance section when an operation signal for the zoom instruction is input to the sounding section or the utterance section.   The audio signal supply unit does not supply an audio signal input from the microphone to the recording device and / or the output device during the optical zoom operation when adjusting the operation time of the optical zoom. The imaging device according to any one of the above.   When adjusting the operation time of the optical zoom, the audio signal supply unit supplies comfort noise to the recording device and / or the output device instead of the audio signal input from the microphone during the optical zoom operation. The imaging device according to any one of claims 1 to 3. The audio signal determination unit determines the voiced section or the utterance section in consideration of noise associated with the optical zoom operation,
The zoom operation adjusting unit adjusts the operation of the optical zoom so that the imaging unit temporarily stops the optical zoom operation when the sound section or the speech section is determined during the optical zoom operation. Item 6. The imaging device according to any one of Items 1 to 5.   The imaging apparatus according to claim 6, wherein the zoom operation adjustment unit further adjusts the operation of the optical zoom such that the imaging unit performs an optical zoom operation after the end of the sound period or the speech period.   The imaging apparatus according to claim 1, wherein the voice signal determination unit determines a section in which a signal-to-noise ratio of the voice signal is equal to or greater than a threshold value as the voiced section or the speech section.   The imaging apparatus according to claim 1, wherein the voice signal determination unit determines a section in which a voice detection value of the voice signal is greater than or equal to a threshold value as the voiced section or the utterance section. Supplying an audio signal input from a microphone to a recording device and / or an output device;
The step includes
Determining the input status of the audio signal;
Determining whether an operation signal for the zoom instruction is input;
When an operation signal for the zoom instruction is input, adjusting an operation time point of the optical zoom according to an input state of the audio signal;
An imaging method including: Supplying an audio signal input from a microphone to a recording device and / or an output device;
The step includes
Determining the input status of the audio signal;
Determining whether an operation signal for the zoom instruction is input;
When an operation signal for the zoom instruction is input, adjusting an operation time point of the optical zoom according to an input state of the audio signal;
A program for causing a computer to execute an imaging method including:

Images