JPH0591449A - Attaching/detaching unit and recorder using same - Google Patents

Abstract

(57) [Summary] [Object] In an apparatus for recording voice using a detachable unit having a drive member, it is possible to record voice by reducing voice noise generated by the drive member in the attach / detach unit. [Structure] A storage unit 8 in which data relating to a state of inherent noise generated from actuators 3 and 4 in a replaceable photographing optical system (detachable unit), and the storage unit 8 are stored.
The camera-side communication means 14 for adjusting the gain of the variable gain amplifier 16 based on the data unique to the actuators 3 and 4 output from the camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable unit having a driving means and a recording device for recording voice using the detachable unit.

[0002]

2. Description of the Related Art In the following description, an integrated video camera for recording a video signal output by an image pickup means on a magnetic tape will be described as an example.

An interchangeable lens system capable of forming a lens in an integrated video camera as well as a silver halide camera has been considered.

The interchangeable lens type video camera is provided with adjusting means for adjusting the exposure and focus of the lens on the interchangeable lens side, and the adjusting means is controlled by the camera side.

[0005]

Generally, the conventional integrated video camera has a problem of driving sounds of actuators such as lens focus, zoom and iris.

That is, the driving sound of the actuator for moving the lens and the diaphragm is picked up during photographing by the external audio microphone, and the driving sound is generated as noise during reproduction, which is a problem.

Further, even if the drive volume is the same, the level at which the drive sound is picked up differs depending on the position of the microphone on the camera side. Therefore, in a lens exchange type video camera system, the noise picked up by the microphone is different for each exchanged lens, which is a particular problem. It was

Under such circumstances, it is an object of the present invention to provide a recording apparatus capable of recording a voice by reducing a voice noise caused by a drive sound generated by a replaceable drive member.

[0009]

A detachable unit according to the present invention is a unit which is attachable to and detachable from a device for recording voice, and which includes drive means having an actuator and data relating to the noise state peculiar to the drive means. And a storage unit that is stored.

Further, the recording apparatus according to the present invention is an apparatus for recording voice by using a detachable unit having a driving means, and a memory storing data relating to a noise state peculiar to the driving means of each unit. Means and adjusting means for adjusting the voice recording level based on the data unique to each drive member output from the storage means.

[0011]

In the above invention, by providing the storage means as described above, the voice recording level is adjusted based on the noise data relating to the drive sound of the actuator, so that the voice noise generated by the drive sound of the actuator during recording is reduced. Can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described below with reference to FIG.
Will be explained.

FIG. 1 is a block diagram of an interchangeable lens (photographing optical system) type video camera system according to the first embodiment.

Referring to FIG. 1, the structure of a replaceable photographing optical system (detachable unit) will be described.

Reference numeral 1 is a lens, 2 is a diaphragm (iris), 3 is an actuator for adjusting the lens 1, 4 is an actuator for adjusting the diaphragm 2, 5 is a driver of the actuator 3, and 6 is the actuator. 4 is a driver, 7 is a lens side communication means (lens side interface) for exchanging communication between the camera side and the lens side, and 8 is a storage unit storing drive sound data (noise data) of the actuators 3 and 4. Is.

Next, the structure of the camera will be described.

Reference numeral 9 is an image pickup device such as a CCD, and 10 is a signal processing circuit for subjecting the signal output from the image pickup device 9 to γ (gamma) conversion and the like, and taking out color signals and luminance signals as video signals. Is.

Reference numeral 11 is an encoder such as NTSC, 12 is a focusing circuit for performing automatic focusing, 13 is a detection circuit for performing automatic exposure, and 14 is a camera side for communicating between the lens side and the camera side. Communication means (camera side interface), 15 is an external sound collecting microphone, and 16 is a variable gain microphone amplifier, which is adjusted by the camera side communication means.

Reference numeral 17 is a recording device such as a VTR for recording the video signal output from the encoder 5 and the audio signal output from the variable amplifier 16.

The recording operation of the video camera configured as described above will be described.

In FIG. 2, the light quantity of the subject light incident through the lens 1 is limited by the diaphragm (iris) 2 and is focused on the image pickup surface of the image pickup device 9.

The formed subject light is photoelectrically converted and output as an image pickup signal. The image pickup signal is subjected to γ (gamma) conversion or the like in the camera signal processing circuit 10 and extracted as a video signal in the form of a color signal and a luminance signal, and the video signal is composited through an encoder 11 such as NTSC. It is output from the camera unit in the form of a signal or the like.

Next, the focusing circuit 12 is used for automatic focusing.
Generates a predetermined actuator drive signal capable of obtaining the in-focus state based on the frequency information of the luminance signal output from the camera signal processing circuit 10.

The drive signal is transmitted to the lens side through the camera side communication means 14.

Similarly, in order to perform automatic exposure, the detection circuit 13
Detects the brightness signal by, for example, integration, and generates a predetermined actuator drive signal that can obtain an appropriate exposure state.
It is transmitted to the lens side as in the focusing operation described above.

On the lens side, the lens 1 and the diaphragm 2 are adjusted by a predetermined amount by the drivers 5 and 6 and the actuators 3 and 4 based on the transmitted drive signals, respectively, and an appropriate photographing state is obtained.

The audio signal output from the microphone 15 is recorded in the recording device 17 together with the video signal, after being amplified by the variable gain amplifier 16 adjusted based on the noise data in the storage section 8 by a predetermined amount.

The noise data in the storage unit 8 is a noise level (volume) generated by the actuators 3 and 4 measured under predetermined conditions (depending on each lens), and the noise data is on the lens side. It is transmitted from the communication means 7 to the camera side communication means 14, and the camera side communication means 14 controls the gain of the variable gain microphone amplifier 16 to a predetermined level based on the noise data.

This gain is different for each camera having a different microphone position.

Therefore, the noise level is made inconspicuous by controlling the gain of the audio signal output from the microphone based on the noise data, and the noise generated by the actuator during reproduction is reduced.

The gain control of the variable gain microphone amplifier 16 may be performed only when the actuator is driven.

A second embodiment according to the present invention will be described below with reference to FIG.

FIG. 2 is a block diagram of an interchangeable lens type video camera system according to the second embodiment.

In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

In the second embodiment, the BPF is used in the first embodiment.
(Bypass filter) 18, trap circuit 19, and fixed amplifier 20 are added.

The BPF 18 is a filter for extracting a predetermined frequency band, and the trap circuit 19 is the BPF 18 described above.
It is a circuit for extracting frequency bands other than those extracted by.

The predetermined frequency band is a frequency band in which noise generated by the actuators 3 and 4 measured in advance at a predetermined location is concentrated.

The recording operation of this embodiment will be described below.

Since the recording operation of the image signal is the same as that of the first embodiment, the recording operation of the audio signal will be described here.

First, the audio signal output from the microphone 15 is input to the BPF 18 and the trap circuit 19.

A predetermined frequency band part is extracted from the audio signal input to the BPF 18, and the extracted audio signal is supplied to the variable gain amplifier 16 based on the noise data of the recording section 8 as in the first embodiment. Is adjusted to the gain value of.

Further, the audio signal input to the trap circuit 19 is taken out of the frequency band portion other than that taken out by the BPF 18, and the taken out audio signal is amplified by the fixed amplifier 20.

Then, the audio signal output from the variable gain amplifier 16 and the audio signal output from the fixed amplifier 20 are added and recorded in the recording device 17.

Therefore, since the gain is adjusted only in a predetermined frequency band, more appropriate noise countermeasures can be taken as compared with the first embodiment.

A third embodiment according to the present invention will be described below with reference to FIG.

FIG. 3 is a block diagram of the interchangeable lens type video camera system according to the third embodiment.

In FIG. 3, the same parts as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 8'denotes a storage section in which noise data is stored. There are two types of data stored in the storage section 8 '. First, one is frequency band data in which noises generated by the actuators 3 and 4 are concentrated. The other is volume data of the noise in the frequency band data.

21 is a BPF 18 'and a trap circuit 1
9'is a frequency characteristic switching circuit for switching the frequency characteristic.

The other structure is the same as that of the second embodiment.

The recording operation of this embodiment will be described below.

Since the recording operation of the image signal is similar to that of the first embodiment, the recording operation of the audio signal will be described here.

First, the frequency band data of noise is read out from the storage section 8'and transmitted to the camera side communication means 14 via the lens side communication means 7, and the camera side communication means 14 determines the frequency characteristic based on the data. A signal is sent to the switching circuit 21, and the frequency characteristic switching circuit 21 switches the frequency band of the BPF 18 'and the trap circuit 19' according to the signal.

The subsequent voice recording operation is similar to that of the second embodiment.

Therefore, the BPF is calculated based on the frequency band data and the sound volume data relating to the noise state for each interchangeable lens.
Since the frequency characteristic of the trap circuit is switched and the gain of the amplifier is adjusted only in a specific frequency band, more appropriate noise countermeasures can be taken as compared with the second embodiment.

[0056]

As described above, the detachable unit of the present invention and the recording apparatus using the detachable unit are provided with the storage means for storing the data relating to the noise state peculiar to the drive means, and the output of the storage means. Since the voice recording level is adjusted based on the data and the voice is recorded,
It is possible to record the voice with the voice noise generated by the driving unit being set to a predetermined level or less.

Therefore, it is possible to appropriately reduce the troublesome noise caused by the driving means during reproduction.

[Brief description of drawings]

FIG. 1 is a block diagram of an interchangeable lens type video camera system according to a first embodiment.

FIG. 2 is a block diagram of an interchangeable lens type video camera system according to a second embodiment.

FIG. 3 is a block diagram of an interchangeable lens type video camera system according to a third embodiment.

[Explanation of symbols]

 3, 4 Actuator 7 Lens side communication means 8, 8'storage unit 14 Camera side communication means 15 Microphone 16 Variable gain amplifier 18, 18 'BPF 19, 19' Trap circuit 20 Fixed amplifier 21 Frequency characteristic switching circuit

Claims (4)

[Claims] 1. A unit which can be attached to and detached from an audio recording device, and which comprises a driving means having an actuator and a storage means for storing data relating to a noise state peculiar to the driving means. Detachable unit. 2. An apparatus for recording voice using a detachable unit having a drive means, comprising: storage means for storing data relating to a noise state peculiar to the drive means of each unit; and the storage means. A recording device, comprising: an adjusting unit that adjusts a voice recording level based on output data specific to each driving member. 3. A unit which is detachably attached to a device for recording voice, and which includes a photographing optical system for photographing a subject image, an adjusting unit for adjusting the photographing optical system, and a noise state specific to the adjusting unit. A detachable unit comprising: a noise storage unit in which data is stored. 4. An image pickup means for converting a formed image into an electric signal by using a detachable unit having a photographing optical system, an adjusting means for adjusting the photographing optical system, and a microphone for collecting an external sound. Recording means for recording a video signal obtained by the image pickup means and an audio signal obtained by the microphone; a noise storage means for storing data relating to a noise state peculiar to the adjusting means; A recording means for controlling the output of the microphone based on the data specific to the adjusting means output from the recording means.