JPH11155188A - Photographing recorder and storage medium read by computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent noises of a drum from being recorded on a tape, when a face reflecting the noises of the drum is increased as a camcorder is placed on a plane such as a table and used for photographing an object. SOLUTION: A planar installation detection section 9 detects whether or not a camcorder main body is placed on a plane, and when it is placed on a plane, switches 12, 13 are turned to the position of contacts (b), (d) to connect a drum noise reduction filter 10 to the circuit. A voice signal from a microphone 5 passes through the filter 10 to attenuate a noise component of a head drum 14 and is processed at an audio signal processing section 7. The processed signal is fed to the head drum 14 with an image signal from a CCD 2 that is processed by a video signal processing section 8 and recorded on a magnetic tape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an imaging and recording apparatus for a camera-integrated video or the like, and more particularly to audio recording.

[0002]

2. Description of the Related Art Conventionally, in a camera-integrated video,
A head drum having a rotating head is provided,
An image sensor and a microphone (hereinafter referred to as a microphone) are provided. The image signal captured by the image sensor and the sound collected by the microphone are respectively processed, and then supplied to the rotating head to be wound around a drum. Recorded on a magnetic tape.

[0003]

As the holding state of the above-mentioned conventional camera-integrated video, there are a case where the video camera is held by hand, a case where a tripod is used, and a case where the video camera is set on a flat surface such as a table. If it is installed on a flat surface, the level of reflection of the operating noise of the internal rotating head drum increases compared to when using a handheld or tripod, so the drum noise collected by the microphone tends to be worse, and tape There was a problem that drum noise was recorded.

[0004] Accordingly, it is an object of the present invention to enable imaging and recording with little drum noise even when a camera-integrated video is installed on a plane.

[0005]

According to a first aspect of the present invention, there is provided an imaging and recording apparatus having a sound collecting means for collecting sound, wherein the detecting unit detects that the apparatus main body is placed on a plane. Means, and filter means used in response to the detection and through which an audio signal obtained from the sound collecting means passes.

[0006] In the imaging and recording apparatus according to the second aspect of the present invention, an imaging means for imaging an object and outputting an image signal;
Sound collecting means for collecting sound and outputting a sound signal; signal processing means for processing the image signal and the sound signal; a head drum having a rotating head to which the processed image signal and the sound signal are supplied; Filter means provided between the sound collecting means and the signal processing means, detecting means for detecting whether or not the apparatus main body is placed on a plane, and wherein the apparatus main body is placed on the plane When it is detected that the sound signal has passed through the filter means, the sound signal is passed to the signal processing means, and when it is detected that the sound signal is not placed on the plane, the sound signal from the sound collecting means is directly subjected to the signal processing. Switching means for providing the means.

According to a fourth aspect of the present invention, in a computer-readable storage medium, a detection process for detecting that an imaging / recording apparatus main body is placed on a plane, and a filter performed on an audio signal in response to the detection. A program for executing the processing is stored.

According to a fifth aspect of the present invention, there is provided a computer-readable storage medium, wherein: an imaging process for imaging an object to obtain an image signal; a sound collection process for collecting audio to obtain an audio signal; A detection process of detecting whether or not the sound signal is placed on the plane, a filter process to be performed on the collected sound signal when it is detected that the sound signal is placed on the plane, Signal processing for processing an audio signal or the collected audio signal and the image signal; and supplying processing for supplying the signal-processed audio signal and image signal to a rotating head of a head drum. I remember the program.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 are drawings showing the features of the present invention best. FIG. 1 shows an overall configuration of a camera-integrated video, wherein 1 is a lens for capturing an optical image, and 2 is a CC as an image sensor for converting the optical image into an electric signal.
D, 3 is a camera signal processing unit for processing electric signals from the CCD 2, 4 is a system control unit for controlling the entire camera-integrated video, 5 is a microphone for collecting sound, and 6 is an audio signal from the microphone 5. A microphone amplifier 7, an audio signal processing unit 7 for performing signal processing of audio signals, and a video signal processing unit 8 for performing video signal processing.

Reference numeral 9 denotes a plane installation detecting unit for detecting that the camera-integrated video is placed on a plane, and reference numeral 10 denotes a drum noise reduction filter for reducing a noise level recorded from a head drum 14 to be described later through the microphone 5. , 11 are head amplifiers that supply the processed video signals, audio signals, and the like to the rotary head as recording currents.
Is a changeover switch for switching between use and nonuse of the drum noise reduction filter 10, and 14 is a head drum having a rotary head for recording a signal on a tape.

FIG. 2 shows a hand-held state of the camera-integrated video. Reference numeral 15 denotes an exterior as a device body of the camera-integrated video, and the microphone 5 and the head drum 14 are shown. Reference numeral 16 denotes a drum noise propagation path in the direction of the microphone 5 in a hand-held state. Reference numeral 17 denotes a finger of a hand. FIG. 3 shows drum noise recorded through the microphone 5 in a hand-held state.

FIG. 4 shows a state in which the camera-integrated video is installed on a plane 18, and the exterior 15, the microphone 5, and the head drum 14 are shown. Reference numeral 19 denotes a drum noise propagation path in the direction of the microphone 5 when the exterior 15 is installed on the flat surface 18. FIG. 5 shows the drum noise recorded through the microphone 5 in a plane installation, and the noise is increased as compared with FIG.

FIG. 6 shows the drum noise reduction filter 10 of FIG.
And the attenuation characteristics in the noise frequency band of FIGS. FIG. 7 shows the drum noise recorded through the microphone 5 when the drum noise reduction filter 10 is used in a plane installation.

FIG. 8 shows the configuration of the flat installation detector 9, in which the exterior 15 and the microphone 5 are shown. Reference numeral 20 denotes a plane installation detection claw for detecting that the exterior 15 is arranged on a plane, and is provided to protrude from a small hole 15 a provided on the bottom surface of the exterior 15. Reference numeral 21 denotes a spring for urging the flat installation detection claw 20 toward the bottom surface. Reference numeral 22 denotes ON or O depending on the position of the flat installation detection claw 20 which is pushed into the small hole 15a at the time of flat installation.
This is a detection switch that performs FF and sends information to the system control unit 4 in FIG.

Next, the operation will be described. As shown in FIGS. 2 to 5, in the camera-integrated video, when installed on a flat surface, the drum noise tends to worsen due to an increase in the number of reflection surfaces, as compared with handheld video. The present invention improves on that. In FIG. 8, when the camera-integrated video is used for hand-held shooting as shown in FIG. 2, the detection switch 22 is turned off because the flat installation detection claw 20 is not pushed in, and the system control unit 4 is turned on in accordance with the information. Switches the contacts of the changeover switches 12 and 13 to a and c, respectively. As shown in FIG. 3, the drum noise during hand-holding is low in terms of level, so the drum noise reduction filter 10 is passed, and the output of the microphone amplifier 6 is directly input to the audio signal processing unit 7.

On the other hand, when the camera-integrated video is set on the flat surface 18 as shown in FIG. 4 for photographing, the flat setting detection claw 20 is pushed up by the flat surface 18 in FIG. The switch is turned on, and the system control unit 4 switches the contacts of the changeover switches 12 and 13 to b and d in accordance with the information. As a result, the drum noise reduction filter 10
And the audio signal processing unit 7.

The frequency characteristic of the drum noise reduction filter 10 is such that the band of the drum noise is attenuated as shown in FIG. 6, and the level of the drum noise recorded is reduced from the level shown in FIG. It attenuates to the level shown in FIG. According to the above operation, even when the head drum 14 is installed on a plane where the noise increases due to reflection, it is possible to perform photographing and recording with less noise.

[0018]

As described above, according to the present invention,
Even when an image capturing and recording apparatus such as a camera-integrated video is installed on a plane where noise reflection increases, an image can be recorded with low noise by selecting a filter characteristic. In particular, by making the filter characteristic a characteristic that attenuates the noise of the head drum, the noise of the head drum, which is particularly conspicuous, can be effectively reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a camera-integrated video according to an embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a drum noise propagation path in a hand-held state.

FIG. 3 is a characteristic diagram illustrating drum noise recorded through a microphone in a hand-held state.

FIG. 4 is a configuration diagram illustrating a drum noise propagation path in a planar installation state.

FIG. 5 is a characteristic diagram illustrating drum noise recorded through a microphone in a flat installation state.

FIG. 6 is a frequency characteristic diagram of a drum noise reduction filter.

FIG. 7 is a characteristic diagram illustrating drum noise recorded when a drum noise reduction filter is turned on in a planar installation state.

FIG. 8 is a configuration diagram of a plane installation detection unit.

[Explanation of symbols]

 2 CCD 3 Camera signal processing unit 4 System control unit 5 Microphone 6 Microphone amplifier 7 Audio signal processing unit 8 Video signal processing unit 9 Flat installation detection unit 10 Drum noise reduction filter 12, 13 Changeover switch 14 Head drum 15 Exterior (device main body) 16, 19 Drum noise 18 Plane

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI H04R 3/04 H04N 5/91 C

Claims (6)

[Claims] 1. An imaging and recording apparatus having sound collecting means for collecting sound, comprising: detecting means for detecting that the apparatus main body is placed on a flat surface; And a filter means through which the received audio signal passes. 2. An image pickup means for picking up an image of a subject and outputting an image signal; a sound collecting means for collecting sound and outputting a sound signal; a signal processing means for processing the image signal and the sound signal; A drum having a rotating head to which the image signal and the audio signal are supplied, a filter provided between the sound collecting means and the signal processing means, and whether or not the apparatus main body is placed on a plane Detection means for detecting, when it is detected that the apparatus main body is placed on the plane, an audio signal passing through the filter means is given to the signal processing means, and the apparatus body is not placed on the plane. Switching means for providing the audio signal from the sound collecting means to the signal processing means as it is when the signal is detected. 3. The apparatus according to claim 2, wherein said filter means has a characteristic of attenuating a frequency band of noise generated by said head drum while said rotary head is operating. 4. A computer-readable storage device storing a program for executing a detection process for detecting that the main body of the imaging and recording apparatus is placed on a plane, and a filtering process performed on an audio signal in response to the detection. Possible storage medium. 5. An image pickup process for picking up an image of a subject to obtain an image signal; a sound collecting process for collecting sound to obtain an audio signal; and a detection process for detecting whether or not the image pickup recording apparatus main body is placed on a plane. And filter processing performed on the collected audio signal when it is detected that the audio signal is placed on the plane; and the filtered audio signal or the collected audio signal and the image A computer-readable storage medium storing a program for executing a signal process for processing a signal and a supply process for supplying the signal-processed audio signal and image signal to a rotary head of a head drum. 6. The filter processing according to claim 5, wherein the filter processing is a processing for attenuating a frequency band of noise generated by the head drum while the rotary head is operating.
The computer-readable storage medium according to any one of the preceding claims.