JPH02185196A - Camera incorporating type video tape recorder - Google Patents
Camera incorporating type video tape recorderInfo
- Publication number
- JPH02185196A JPH02185196A JP1005569A JP556989A JPH02185196A JP H02185196 A JPH02185196 A JP H02185196A JP 1005569 A JP1005569 A JP 1005569A JP 556989 A JP556989 A JP 556989A JP H02185196 A JPH02185196 A JP H02185196A
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- circuit
- external microphone
- external
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、カメラ一体型ビデオテープレコーダに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a camera-integrated videotape recorder.
従来の技術
近年、カメラ一体型ビデオテープレコーダ（ＪＸ下、カ
メラ一体型ＶＴＲという）は、５−ＶＨ８の導入により
、高画質化が進んでいるが、音質の面でも性能向上の要
求が強くなってきている。Conventional technology In recent years, the image quality of camera-integrated video tape recorders (under JX, referred to as camera-integrated VTRs) has improved with the introduction of the 5-VH8, but there has also been a strong demand for improved performance in terms of sound quality. It's coming.
以下、図面を参照にしながら上述した従来のカメラ一体
型ＶＴＲの一例について説明する。第２図は従来のカメ
ラ一体型ＶＴＲの音声回路の記録系の入力部のブロック
図である。第２図において、内蔵マイク１と、外部マイ
クを接続する外部マイク端子２は内蔵マイクと外部マイ
クを切り換える切換回路３に接続され、このマイク切換
回路３から出力されるマイク信号はマイクアンプ回路４
で増幅され、記録信号端子５から磁気テープに信号を記
録するための記録回路に送られる。An example of the above-mentioned conventional camera-integrated VTR will be described below with reference to the drawings. FIG. 2 is a block diagram of the input section of the recording system of the audio circuit of a conventional camera-integrated VTR. In FIG. 2, a built-in microphone 1 and an external microphone terminal 2 for connecting an external microphone are connected to a switching circuit 3 for switching between the built-in microphone and an external microphone, and the microphone signal output from this microphone switching circuit 3 is transmitted to a microphone amplifier circuit 4.
The signal is amplified and sent from the recording signal terminal 5 to a recording circuit for recording the signal on a magnetic tape.
このように構成された従来のカメラ一体型ＶＴＲについ
て、その動作を説明する。まず、外部マイクが外部マイ
ク端子２に接続されていないときは、内蔵マイク・外部
マイク切換回路３は内蔵マイク１と接続されており、音
声信号は内蔵マイク１から入力され、内蔵マイク・外部
マイク切換回路３を通ってマイクアンプ回路４に入力さ
れる。The operation of the conventional camera-integrated VTR configured as described above will be explained. First, when the external microphone is not connected to the external microphone terminal 2, the built-in microphone/external microphone switching circuit 3 is connected to the built-in microphone 1, and the audio signal is input from the built-in microphone 1. The signal is inputted to the microphone amplifier circuit 4 through the switching circuit 3.
マイクアンプ回路４では音声信号を増幅し、記録信号端
子５を通して記録回路に送られる。また、外部マイクが
外部マイク端子２に接続されると、内蔵マイク・外部マ
イク切換回路３は外部マイク端子２と接続され、音声信
号は外部マイクから入力され、外部マイク端子２および
内蔵マイク・外部マイク切換回路３を通ってマイクアン
プ回路４に入力される。マイクアンプ回Ｍ４では音声信
号を増幅し、記録信号端子５を通して記録回路に送られ
る。The microphone amplifier circuit 4 amplifies the audio signal and sends it to the recording circuit through the recording signal terminal 5. Also, when the external microphone is connected to the external microphone terminal 2, the built-in microphone/external microphone switching circuit 3 is connected to the external microphone terminal 2, and the audio signal is input from the external microphone. The signal is inputted to the microphone amplifier circuit 4 through the microphone switching circuit 3. The microphone amplifier circuit M4 amplifies the audio signal and sends it to the recording circuit through the recording signal terminal 5.
発明が解決しようとする課題
しかしながら上記のような構成では、内蔵マイク１がカ
メラ一体型ＶＴＲに固定されているため、ＶＴＲ本体の
雑音や振動が音声信号と同時に内蔵マイクから入力され
る。このＮ音を低減するためにマイクアンプ回路４の周
波数特性（以下、Ｆ特という）の低減成分および高域成
分を落としている。また外部マイクを使用する場合は、
カメラ−体型ＶＴＲから離して使用するため、ＶＴＲ本
体の雑音や振動が問題にならないにもかがわらず・内蔵
マイクと同じＦ特の低域成分および高域成分・を落とし
たマイクアンプ回路４を通るため、外部マイク使用時の
音声信号のＦ特が犠牲になるという問題を有していた。Problems to be Solved by the Invention However, in the above configuration, since the built-in microphone 1 is fixed to the camera-integrated VTR, the noise and vibration of the VTR body are input from the built-in microphone at the same time as the audio signal. In order to reduce this N sound, the reduction component and high frequency component of the frequency characteristic (hereinafter referred to as F characteristic) of the microphone amplifier circuit 4 are reduced. Also, if you use an external microphone,
Since the camera is used away from the VTR, the noise and vibration of the VTR itself is not a problem. Therefore, there was a problem in that the F characteristic of the audio signal was sacrificed when an external microphone was used.
本発明は上記問題を解決するもので、外部マイクが外部
マイク端子に接続されたときに、マイクアンプ回路のＦ
特をフラットにして、外部マイクからの音質を損なわな
いようにしたカメラ一体型ＶＴＲを提供するものである
。The present invention solves the above problem, and when an external microphone is connected to the external microphone terminal, the F of the microphone amplifier circuit is
The purpose of the present invention is to provide a camera-integrated VTR in which the sound quality from an external microphone is not impaired by flattening the main body.
課題を解決するための手段
上記問題を解決するために本発明のカメラ一体型ＶＴＲ
は、内蔵マイクと外部マイク端子と、内蔵マイク・外部
マイク切換回路と、マイクアンプ回路を備え、さらに外
部マイクの接続状態を検知する回路と、外部マイクが接
続されたときにマイクアンプ回路のＦ特を補正する回路
を備えたものである。Means for Solving the Problems In order to solve the above problems, a camera-integrated VTR of the present invention is provided.
The is equipped with a built-in microphone, an external microphone terminal, a built-in microphone/external microphone switching circuit, a microphone amplifier circuit, and a circuit that detects the connection status of the external microphone, and a circuit that detects the connection status of the external microphone, and It is equipped with a circuit that corrects the characteristics.
作用
上記した構成により１、外部マイクが外部マイク端子に
接続されたときに、これを検知してマイクアンプ回路の
Ｆ特をフラットにし、これにより外部マイクからの音質
を損なうことなく音声信号を磁気テープに記録すること
ができるものである。Effects With the above configuration, 1. When an external microphone is connected to the external microphone terminal, it is detected and the F characteristic of the microphone amplifier circuit is flattened, thereby magnetically converting the audio signal from the external microphone without degrading the sound quality. It can be recorded on tape.
実施例 以下、本発明の一実施例を図面に基づいて説明する。Example Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明の一実施例のカメラ一体型ＶＴＲの音声
信号入力部のブロック図を示すものである。第１図にお
いて、内蔵マイク１、外部マイクをｍ続する外部マイク
端子２、内Ｍマイクと外部マイクを切り換える切換回路
３、マイクからの信号を増幅するマイクアンプ回路４、
磁気テープに信号を記録するための記録回路に接続され
る記録信号端子５は第２図のものと同じである。外部マ
イク端子２はさらに外部マイクが接続されたことを検知
する外部マイク検知回路６に接続され、その出力はマイ
クアンプ回路４のＦ特を補正するＦ特補正回路７に入力
される。FIG. 1 shows a block diagram of an audio signal input section of a camera-integrated VTR according to an embodiment of the present invention. In FIG. 1, a built-in microphone 1, an external microphone terminal 2 that connects an external microphone, a switching circuit 3 that switches between the internal microphone and the external microphone, a microphone amplifier circuit 4 that amplifies the signal from the microphone,
The recording signal terminal 5 connected to the recording circuit for recording signals on the magnetic tape is the same as that shown in FIG. The external microphone terminal 2 is further connected to an external microphone detection circuit 6 that detects that an external microphone is connected, and its output is input to an F-characteristic correction circuit 7 that corrects the F-characteristic of the microphone amplifier circuit 4.
このように構成されたカメラ一体型ＶＴＲについてその
動作を説明する。まず、外部マイクが外部マイク端子２
に接続されていないときは、内蔵マイク・外部マイク切
換回路３は内蔵マイク１と接続されており、音声信号は
内蔵マイク１がら入力され、内蔵マイク・外部マイク切
換回路３を通ってマイクアンプ回路４に入力される。マ
イクアンプ回路４では音声信号を増幅し、記録信号端子
５を通して記録回路に入力される。The operation of the camera-integrated VTR configured in this way will be explained. First, connect the external microphone to external microphone terminal 2.
When not connected to the built-in microphone/external microphone switching circuit 3, the built-in microphone/external microphone switching circuit 3 is connected to the built-in microphone 1, and the audio signal is input from the built-in microphone 1, passes through the built-in microphone/external microphone switching circuit 3, and is sent to the microphone amplifier circuit. 4 is input. The microphone amplifier circuit 4 amplifies the audio signal and inputs it to the recording circuit through the recording signal terminal 5.
また外部マイクが外部マイク端子２に接続されると、内
蔵マイク・外部マイク切換回路３は外部マイク端子２と
接続され、音声信号は外部マイクから入力され外部マイ
ク端子２および内蔵マイク・外部マイク切換回路３を通
って、マイクアンプ回路４に入力される。このとき外部
マイクが外部マイク端子２に接続されると外部マイク検
知回路６が動作し、Ｆ特補正回路７によりマイクアンプ
回路４のＦ特がフラットに補正される。そしてマイクア
ンプ回路４では音声信号を層幅し、記録信号端子５を通
して記録回路に入力される。Also, when an external microphone is connected to the external microphone terminal 2, the built-in microphone/external microphone switching circuit 3 is connected to the external microphone terminal 2, and the audio signal is input from the external microphone and is switched between the external microphone terminal 2 and the built-in microphone/external microphone switching circuit. The signal passes through the circuit 3 and is input to the microphone amplifier circuit 4. At this time, when an external microphone is connected to the external microphone terminal 2, the external microphone detection circuit 6 operates, and the F characteristic correction circuit 7 corrects the F characteristic of the microphone amplifier circuit 4 to be flat. The microphone amplifier circuit 4 amplifies the audio signal and inputs it to the recording circuit through the recording signal terminal 5.
このように本実施例によれば、外部マイク端子２と連動
した外部マイク検知回路６およびＦ特補正回路７を設け
ることにより、外部マイクから入力される音声信号の音
質を損なうことなく、磁気テープに記録することができ
る。As described above, according to the present embodiment, by providing the external microphone detection circuit 6 and the F-characteristic correction circuit 7 that are linked to the external microphone terminal 2, magnetic tape can be processed without impairing the sound quality of the audio signal input from the external microphone. can be recorded.
発明の効果
以上のように本発明によれば、外部マイク検知回路およ
び周波数特性を変化させるＦ特補正回路を設けることに
より、外部マイクからの音声信号の特性を損なうことな
く録音できるといったすぐれた効果を得ることができる
。Effects of the Invention As described above, according to the present invention, by providing an external microphone detection circuit and an F-characteristic correction circuit that changes the frequency characteristics, it is possible to record an audio signal from an external microphone without damaging its characteristics. can be obtained.
第１図は本発明の一実施例のカメラ一体型ＶＴＲの音声
信号入力部のブロック図、第２図は従来のカメラ一体型
ＶＴＲの音声信号入力部のブロック図である。
１・・・内蔵マイク、２・・・外部マイク端子、３・・
・内蔵マイク・外部マイク切換回路、４・・・マイクア
ンプ回路、５・・・記録信号端子、６・・・外部マイク
検知回路、７・・・Ｆ特補正回路。
代理人 森 本 義 弘FIG. 1 is a block diagram of an audio signal input section of a camera-integrated VTR according to an embodiment of the present invention, and FIG. 2 is a block diagram of an audio signal input section of a conventional camera-integrated VTR. 1...Built-in microphone, 2...External microphone terminal, 3...
- Built-in microphone/external microphone switching circuit, 4... microphone amplifier circuit, 5... recording signal terminal, 6... external microphone detection circuit, 7... F special correction circuit. Agent Yoshihiro Morimoto
Claims (1)
続する外部マイク端子と、これらに接続される内蔵マイ
ク・外部マイク切換回路と、前記マイク切換回路から出
力される音声信号を増幅するマイクアンプ回路と、外部
マイクが外部マイク端子に接続されたことを検知する外
部マイク検知回路と、前記外部マイク検知回路の出力を
受けてマイクアンプ回路の周波数特性を補正する周波数
補正回路とを備えたカメラ一体型ビデオテープレコーダ
。1. A built-in microphone that inputs audio signals, an external microphone terminal that connects an external microphone, a built-in microphone/external microphone switching circuit connected to these, and a microphone amplifier that amplifies the audio signal output from the microphone switching circuit. A camera comprising a circuit, an external microphone detection circuit that detects that an external microphone is connected to an external microphone terminal, and a frequency correction circuit that receives an output of the external microphone detection circuit and corrects the frequency characteristics of a microphone amplifier circuit. Integrated videotape recorder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005569A JPH02185196A (en) | 1989-01-12 | 1989-01-12 | Camera incorporating type video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005569A JPH02185196A (en) | 1989-01-12 | 1989-01-12 | Camera incorporating type video tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02185196A true JPH02185196A (en) | 1990-07-19 |
Family
ID=11614846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1005569A Pending JPH02185196A (en) | 1989-01-12 | 1989-01-12 | Camera incorporating type video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02185196A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1732353A2 (en) * | 2005-06-06 | 2006-12-13 | Sony Corporation | Recording device and adjustment method of audio input signals of the recording device |
| JP2008167404A (en) * | 2006-12-29 | 2008-07-17 | Lenovo Singapore Pte Ltd | Automatic control for computer audio input and output |
| JP2011040991A (en) * | 2009-08-11 | 2011-02-24 | Nikon Corp | Imaging device and imaging system |
-
1989
- 1989-01-12 JP JP1005569A patent/JPH02185196A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1732353A2 (en) * | 2005-06-06 | 2006-12-13 | Sony Corporation | Recording device and adjustment method of audio input signals of the recording device |
| EP1732353A3 (en) * | 2005-06-06 | 2007-01-24 | Sony Corporation | Recording device and adjustment method of audio input signals of the recording device |
| US7907741B2 (en) | 2005-06-06 | 2011-03-15 | Sony Corporation | Recording device and adjustment method of recording device |
| JP2008167404A (en) * | 2006-12-29 | 2008-07-17 | Lenovo Singapore Pte Ltd | Automatic control for computer audio input and output |
| US8861740B2 (en) | 2006-12-29 | 2014-10-14 | Lenovo (Singapore) Pte. Ltd. | Automatic computer audio input and output control |
| JP2011040991A (en) * | 2009-08-11 | 2011-02-24 | Nikon Corp | Imaging device and imaging system |
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