JPH066751A - Fm receiver-recorder and fm transmitter - Google Patents

Fm receiver-recorder and fm transmitter

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Publication number
JPH066751A
JPH066751A JP4185899A JP18589992A JPH066751A JP H066751 A JPH066751 A JP H066751A JP 4185899 A JP4185899 A JP 4185899A JP 18589992 A JP18589992 A JP 18589992A JP H066751 A JPH066751 A JP H066751A
Authority
JP
Japan
Prior art keywords
signal
frequency
circuit
recording
receiving
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.)
Withdrawn
Application number
JP4185899A
Other languages
Japanese (ja)
Inventor
Ryota Osumi
住 良 太 大
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP4185899A priority Critical patent/JPH066751A/en
Publication of JPH066751A publication Critical patent/JPH066751A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To simplify the configuration of a recording system and to prevent sound quality from being deteriorated by repeatedly recording an FM audio signal by a recording system in a audio recorder without using a demodulator and a modulator. CONSTITUTION:Only a necessary audio signal is extracted from a signal received by a receiving antenna 21 by a frequency selecting circuit 22 and carrier frequency is converted from f0 to fa by a frequency converter 23, but the frequency deflecting width of the frequency is not changed. The audio signal outputted from the converter 23 is mixed with an image luminance signal modulated by a luminance signal recording processing circuit 24 and an image chrominance signal modulated by a chrominance signal recording processing circuit 25 and frequency-multiplexed by an adder 26, the multiplexed signal is amplified up to a proper level by a recording amplifier 27, and then the amplified signal is recorded in a magnetic tape 29 through a magnetic head 28.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はFM受信記録装置及びF
M伝送装置に関し、特にマイク部を装置本体から分離し
た状態でも簡単な構成で集音記録できるようにしたFM
受信記録装置及びFM伝送装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FM receiver / recorder and an F receiver.
Regarding the M transmission device, in particular, the FM capable of collecting and recording sound with a simple structure even when the microphone part is separated from the device body
The present invention relates to a reception recording device and an FM transmission device.

【0002】[0002]

【従来の技術】例えば、カメラ一体型ビデオテープレコ
ーダ(VTR)においては、マイク部の機動性を向上さ
せるため、マイク部を記録系と分離し、マイクロホンで
得られた音声信号を変調して電波で送信するワイヤレス
マイク構成が採用されている。この構成では、音声電波
信号が本体部のアンテナで受信され、復調されて録音さ
れる。また、例えば特開昭61ー32686号に開示されてい
るような、音声信号を映像信号、各種制御信号と合成し
た合成信号を電波で記録系に送信することによりビデオ
カメラの機動性を向上させた装置も提案されている。
2. Description of the Related Art For example, in a camera-integrated video tape recorder (VTR), in order to improve the mobility of the microphone, the microphone is separated from the recording system, and a voice signal obtained by a microphone is modulated to generate radio waves. A wireless microphone configuration for transmitting in is adopted. In this configuration, the voice radio signal is received by the antenna of the main body, demodulated and recorded. Further, as disclosed in, for example, Japanese Patent Laid-Open No. 61-32686, the mobility of a video camera is improved by transmitting a composite signal obtained by combining an audio signal with a video signal and various control signals to a recording system by radio waves. Devices have also been proposed.

【0003】今日の家庭用VTRにおいては、通常、映
像色信号、音声信号、映像輝度信号は、それぞれ変調さ
れ、図4に示すように、周波数多重されて記録される。
同図において、S1は周波数変換色信号Cの帯域、S2
は周波数変調(FM)音声信号Aの帯域、S3はFM変
調輝度信号Yの周波数帯域を示す。例えば、8mmVT
RにおけるFM音声信号のメインチャンネルの搬送周波
数は1.5MHz、周波数偏移幅は±60KHz(基準
レベル)である。
In today's home VTR, the video color signal, the audio signal, and the video luminance signal are usually modulated and frequency-multiplexed and recorded as shown in FIG.
In the figure, S1 is a band of the frequency conversion color signal C, and S2 is
Indicates the frequency band of the frequency modulated (FM) audio signal A, and S3 indicates the frequency band of the FM modulated luminance signal Y. For example, 8mmVT
The carrier frequency of the main channel of the FM audio signal in R is 1.5 MHz, and the frequency shift width is ± 60 KHz (reference level).

【0004】従来のこの種VTRの構成が図5と図6に
示されている。図5はマイク部の構成を示し、マイクロ
ホン101から得られた音声信号は、マイクアンプ10
2で増幅され、FM変調器103で周波数変調され、更
に出力アンプ104で増幅された後、変調音声信号がア
ンテナ105を介して電波で空間に送出される。
The structure of a conventional VTR of this type is shown in FIGS. FIG. 5 shows the configuration of the microphone unit. The audio signal obtained from the microphone 101 is the microphone amplifier 10
After being amplified by 2, the frequency is modulated by the FM modulator 103, and further amplified by the output amplifier 104, the modulated audio signal is sent to the space by radio waves via the antenna 105.

【0005】図6は本体側の受信記録系の構成ブロック
図である。受信アンテナ201は、アンテナ105から
空間に飛ばされた電波信号を受信する。この受信信号
は、周波数選択回路202で所望の周波数成分が選択さ
れ、復調器203で復調され、音声信号記録処理回路2
04によりVTRの規格に適するように圧縮、エンファ
シス及びFM変調処理が施される。入力端子TYから入
力された輝度信号は、輝度信号記録処理回路205によ
り輝度信号の変調等の処理が施される。また、入力端子
Tcから入力された色信号は色信号記録処理回路206
によって変調等の処理が行われる。加算器207は、音
声信号処理回路204、輝度信号処理回路205及び色
信号処理回路206からの出力信号を加算する。この加
算信号は、記録アンプ208で増幅された後、磁気ヘッ
ド209を介して磁気テープ210に記録される。
FIG. 6 is a block diagram showing the configuration of a receiving / recording system on the main body side. The receiving antenna 201 receives the radio wave signal that has been sent to the space from the antenna 105. A desired frequency component of the received signal is selected by the frequency selection circuit 202, demodulated by the demodulator 203, and the audio signal recording processing circuit 2
According to 04, compression, emphasis, and FM modulation processing are performed so as to comply with the VTR standard. The luminance signal input from the input terminal TY is subjected to processing such as luminance signal modulation by the luminance signal recording processing circuit 205. The color signal input from the input terminal Tc is stored in the color signal recording processing circuit 206.
Processing such as modulation is performed by. The adder 207 adds the output signals from the audio signal processing circuit 204, the luminance signal processing circuit 205, and the color signal processing circuit 206. The added signal is amplified by the recording amplifier 208 and then recorded on the magnetic tape 210 via the magnetic head 209.

【0006】図7は、本体側の再生系回路構成を示す。
磁気テープ301から磁気ヘッド302を介して再生さ
れた信号は、再生アンプ303で増幅される。この増幅
信号からは、バンドパスフィルタ(BPF)304によ
り音声信号が、ハイパスフィルタ(HPF)305によ
り映像輝度信号が、ローパスフィルタ(LPF)306
により色信号のみが取り出される。音声信号再生処理回
路307は、バンドパスフィルタ(BPF)304で得
られたFM音声信号に対して復調、ディエンファシス及
び伸張を行って、音声出力端子T11に送出する。輝度信
号再生処理回路308は、ハイパスフィルタ305によ
り得られたFM輝度信号の復調などの処理を行い、輝度
信号出力端子T12に送出する。色信号再生処理回路30
9は、ローパスフィルタ306により得られた低域変換
色信号に復調などの処理を施し色信号出力端子T13に送
出する。
FIG. 7 shows a reproduction system circuit configuration on the main body side.
A signal reproduced from the magnetic tape 301 via the magnetic head 302 is amplified by the reproduction amplifier 303. From this amplified signal, a bandpass filter (BPF) 304 outputs an audio signal, a highpass filter (HPF) 305 outputs a video luminance signal, and a lowpass filter (LPF) 306.
By this, only the color signal is extracted. The audio signal reproduction processing circuit 307 performs demodulation, de-emphasis, and expansion on the FM audio signal obtained by the band pass filter (BPF) 304, and sends it to the audio output terminal T11. The luminance signal reproduction processing circuit 308 performs processing such as demodulation of the FM luminance signal obtained by the high pass filter 305 and sends it to the luminance signal output terminal T12. Color signal reproduction processing circuit 30
Reference numeral 9 subjects the low-pass converted color signal obtained by the low-pass filter 306 to processing such as demodulation and sends it to the color signal output terminal T13.

【0007】以上の従来の装置の動作をまとめると、図
5〜図7の構成において、マイクロホン101によって
集音された音声信号は、マイクアンプ102で増幅さ
れ、FM変調器103で変調される。変調された音声信
号は、出力アンプ104とアンテナ105を経て空間に
放射される。空間に放射された変調音声信号は、アンテ
ナ201で受信され、周波数選択回路202で同調され
た後、復調器203で元の波形の音声信号に復調され、
音声信号記録処理回路204でVTRの規格に適したエ
ンファシス、圧縮及びFM変調が行われる。このFM変
調音声信号は、信号処理と変調がなされた映像輝度信号
や色信号と加算器207で混合され、周波数多重され、
記録アンプ208で適正なレベルにまで増幅された後、
磁気ヘッド209を介して磁気テープ210に記録され
る。再生系では、磁気テープ301から磁気ヘッド30
2を介して得られた再生信号が再生アンプ303で増幅
され、BPF304で音声信号のみが選択された後、音
声信号再生処理回路307で復調、ディエンファシス及
び伸張がなされる。復調されて元の波形に戻った音声信
号は出力端子T11から出力されて、例えばパワーアンプ
(図示せず)のライン入力などに接続される。
To summarize the operation of the above conventional apparatus, in the configuration shown in FIGS. 5 to 7, the audio signal collected by the microphone 101 is amplified by the microphone amplifier 102 and modulated by the FM modulator 103. The modulated audio signal is radiated into space via the output amplifier 104 and the antenna 105. The modulated audio signal radiated into space is received by the antenna 201, tuned by the frequency selection circuit 202, and then demodulated by the demodulator 203 into an audio signal having an original waveform.
The audio signal recording processing circuit 204 performs emphasis, compression and FM modulation suitable for the VTR standard. This FM-modulated audio signal is mixed with a video luminance signal or color signal that has been subjected to signal processing and modulation by an adder 207 and frequency-multiplexed,
After being amplified to a proper level by the recording amplifier 208,
The data is recorded on the magnetic tape 210 via the magnetic head 209. In the reproducing system, from the magnetic tape 301 to the magnetic head 30
The reproduction signal obtained via 2 is amplified by the reproduction amplifier 303, only the audio signal is selected by the BPF 304, and then demodulated, de-emphasized and expanded by the audio signal reproduction processing circuit 307. The audio signal demodulated and returned to the original waveform is output from the output terminal T11 and connected to, for example, a line input of a power amplifier (not shown).

【0008】[0008]

【発明が解決しようとする課題】上述従来の装置構成で
は、復調した信号を再び変調しているので、その処理の
ために構成が複雑となるだけでなく、変調や復調に伴っ
て信号対雑音比(SN比)の低下やひずみ率の増大をそ
の分だけ招き、音質が低下するという問題があった。
In the above-mentioned conventional device configuration, since the demodulated signal is re-modulated, not only the configuration becomes complicated due to the processing but also the signal-to-noise due to the modulation and the demodulation. There is a problem in that the ratio (SN ratio) is decreased and the distortion rate is increased, and the sound quality is deteriorated.

【0009】そこで、本発明の目的は、マイク部を装置
から分離した状態でも構成が複雑化することなく、音質
の劣化を抑えることのできるFM受信記録装置及びFM
伝送装置を提供することにある。
Therefore, an object of the present invention is to provide an FM receiving / recording device and an FM receiving / recording device capable of suppressing deterioration of sound quality without complicating the structure even when the microphone part is separated from the device.
It is to provide a transmission device.

【0010】[0010]

【課題を解決するための手段】前述の課題を解決するた
め、本発明によるFM受信記録装置は、第1の周波数の
搬送波を当該ベースバンドの信号でFM変調してなる第
1のFM変調波として伝搬するようになされた信号を受
信するための受信回路と、上記受信回路により受信され
たFM変調波を上記第1の周波数よりも低域の第2の周
波数の搬送波をFM変調してなる第2のFM変調波に変
換するための周波数変換回路と、上記周波数変換回路の
出力たるFM変調信号を適用された当該情報記録媒体に
記録するためのFM記録回路と、を備えて構成される。
In order to solve the above-mentioned problems, an FM receiving / recording apparatus according to the present invention is a first FM-modulated wave obtained by FM-modulating a carrier of a first frequency with a signal of the baseband. A receiving circuit for receiving a signal adapted to propagate as a signal, and an FM modulated wave received by the receiving circuit is FM-modulated with a carrier wave of a second frequency lower than the first frequency. A frequency conversion circuit for converting into a second FM modulated wave, and an FM recording circuit for recording the FM modulated signal output from the frequency conversion circuit in the applied information recording medium are configured. .

【0011】また、本発明によるFM伝送装置は、第1
の周波数の搬送波を当該ベースバンドの信号でFM変調
してなる第1のFM変調波として伝搬するようになされ
た信号を受信するための受信回路と、上記受信回路によ
り受信されたFM変調波を上記第1の周波数よりも低域
の第2の周波数の搬送波をFM変調してなる第2のFM
変調波に変換するための周波数変換回路と、上記周波数
変換回路の出力たるFM変調信号を適用された当該情報
記録媒体に記録するためのFM記録回路と、を有してな
るFM受信記録装置に適合するFM伝送装置であって、
被検出音声に対応する上記ベースバンドの信号を生成す
るためのトランスデューサ回路と、上記トランスデュー
サ回路出力によって上記第1の周波数の搬送波をFM変
調してなる第1のFM変調波を形成するための搬送信号
形成回路と、上記搬送信号形成回路の出力を媒質中に送
出せしめるための送出回路と、を備え、上記FM受信記
録装置と結合されたときには、上記搬送信号形成回路の
出力たる第1のFM変調波を上記FM受信記録装置へ入
力として供給するように構成される。
The FM transmission apparatus according to the present invention is the first
A receiving circuit for receiving a signal that is propagated as a first FM modulated wave that is obtained by FM-modulating a carrier wave of the frequency of the base band signal, and an FM modulated wave received by the receiving circuit. A second FM obtained by FM-modulating a carrier having a second frequency lower than the first frequency.
An FM receiving / recording device comprising: a frequency conversion circuit for converting into a modulated wave; and an FM recording circuit for recording the FM modulated signal output from the frequency conversion circuit onto the information recording medium to which the FM modulation signal is applied. A compatible FM transmission device,
A transducer circuit for generating the baseband signal corresponding to the detected sound, and a carrier for forming a first FM modulated wave by FM-modulating the carrier wave of the first frequency by the output of the transducer circuit. A first FM which is an output of the carrier signal forming circuit when provided with a signal forming circuit and a sending circuit for sending the output of the carrier signal forming circuit into a medium, when combined with the FM receiving and recording device. It is configured to provide a modulated wave as an input to the FM receiving and recording device.

【0012】[0012]

【作用】本発明では、音声をFM変調して例えば電波信
号として送出し、受信側では該電波信号を受信し、低域
周波数に周波数変換してFM記録し、記録側で変調、復
調を行わないようにすることにより、回路構成の簡略化
を達成し、音質の劣化を防止している。
In the present invention, the sound is FM-modulated and sent out as, for example, a radio wave signal, the reception side receives the radio wave signal, frequency-converts it into a low frequency and FM records it, and the recording side performs modulation and demodulation. By avoiding this, the simplification of the circuit configuration is achieved and the deterioration of sound quality is prevented.

【0013】[0013]

【実施例】次に、本発明について図面を参照しながら説
明する。図1は、本発明の一実施例における録音装置
(本実施例ではVTR)のマイク部回路の構成を示すブ
ロック図を、また、図2はVTRの受信記録系回路を示
すブロック図を示す。本実施例では、受信記録系と再生
系は共にVTR本体に内蔵され、マイク部はVTR本体
から取り外すことができる構成とされている。図1にお
いて、マイクロホン11により得られた音声信号は、マ
イクアンプ12で増幅され、ノイズリダクション回路1
3で、音声信号のエンファシスと圧縮が行われる。ノイ
ズリダクション回路13からの音声信号は、FM変調器
14において、搬送周波数f0で周波数変調された後、
出力アンプ15で増幅され、FM音声信号の電波信号と
して送信アンテナ16を介して空間に送出される。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a microphone circuit of a recording apparatus (VTR in this embodiment) in one embodiment of the present invention, and FIG. 2 is a block diagram showing a receiving / recording system circuit of a VTR. In this embodiment, both the receiving and recording system and the reproducing system are built in the VTR main body, and the microphone part can be detached from the VTR main body. In FIG. 1, the audio signal obtained by the microphone 11 is amplified by the microphone amplifier 12, and the noise reduction circuit 1
At 3, emphasis and compression of the audio signal is performed. The audio signal from the noise reduction circuit 13 is frequency-modulated by the FM modulator 14 at the carrier frequency f0,
The signal is amplified by the output amplifier 15 and is sent to the space as a radio wave signal of the FM audio signal via the transmitting antenna 16.

【0014】図2において、受信アンテナ21で受信さ
れた受信信号から必要な音声信号だけが周波数選択回路
22により取り出され、周波数変換器23により取り出
されたFM音声信号の搬送周波数がf0からfa(f0>f
a)に変換される。映像輝度信号の入力端子T1から入力
される輝度信号は輝度信号記録処理回路24により変調
等の処理が施され、映像色信号の入力端子T2から入力
される色信号は色信号記録処理回路25により変調等の
処理が施される。図6と同様に、加算器26で加算され
た信号は、記録アンプ27で所定レベルまで増幅された
後、磁気ヘッド28を介して磁気テープ29に記録され
る。すなわち、マイクロホン11によって集音された音
声信号は、マイクアンプ12で十分なレベルに増幅さ
れ、ノイズリダクション回路13でVTRの規格に適し
たエンファシスと圧縮が行われた後、FM変調器14で
搬送周波数f0で周波数変調(FM)される。このとき
の周波数偏移幅はVTRの規格に適する値とする。例え
ば8mmVTRにおけるメインチャンネルの周波数偏移
幅は基準レベルで±60KHz、最大で±100KHz
である。また、このときの搬送周波数f0は通常のFM
放送の空きチャンネルに選ばれる。例えば東京では86
MHzなどである。
In FIG. 2, only the necessary audio signal is extracted from the received signal received by the receiving antenna 21 by the frequency selection circuit 22, and the carrier frequency of the FM audio signal extracted by the frequency converter 23 is f0 to fa ( f0> f
is converted to a). The luminance signal input from the image luminance signal input terminal T1 is subjected to processing such as modulation by the luminance signal recording processing circuit 24, and the color signal input from the image color signal input terminal T2 is processed by the color signal recording processing circuit 25. Processing such as modulation is performed. Similar to FIG. 6, the signal added by the adder 26 is amplified to a predetermined level by the recording amplifier 27 and then recorded on the magnetic tape 29 via the magnetic head 28. That is, the voice signal collected by the microphone 11 is amplified to a sufficient level by the microphone amplifier 12, is subjected to emphasis and compression suitable for the VTR standard in the noise reduction circuit 13, and is then conveyed in the FM modulator 14. Frequency modulation (FM) is performed at the frequency f0. The frequency shift width at this time is a value suitable for the VTR standard. For example, the frequency deviation width of the main channel in the 8 mm VTR is ± 60 KHz at the reference level and ± 100 KHz at the maximum.
Is. Further, the carrier frequency f0 at this time is the normal FM.
Selected as a free channel for broadcasting. For example, in Tokyo 86
MHz and the like.

【0015】FM変調された音声信号は、FM変調器1
4、出力アンプ15及びアンテナ16を経て空間に放射
される。空間に放射されたFM音声信号は、アンテナ2
1で受信され、周波数選択回路22の周波数をf0に合
わせる。周波数f0で受信されたFM音声信号は、周波
数変換器23で搬送周波数がf0からfaに変換される
が、周波数偏移幅は変化しない。ここで搬送周波数fa
はVTRの規格に適する値であり、例えば8mmVTR
におけるメインチャンネルの搬送周波数は1.5MHz
である。以上、周波数変換器23から出力されるFM音
声信号の搬送周波数、周波数偏移幅、エンファシス及び
圧縮はVTRのFM音声記録の規格に適合している。周
波数変換器23から出力された音声信号は、輝度信号記
録処理回路24で変調処理された映像輝度信号や色信号
記録処理回路25で変調処理された映像色信号と加算器
26において混合され、周波数多重され、記録アンプ2
7により適正なレベルにまで増幅された後、磁気ヘッド
28を介して磁気テープ29に記録される。
The FM-modulated voice signal is generated by the FM modulator 1.
4, the output amplifier 15 and the antenna 16 are radiated into the space. The FM sound signal radiated into space is transmitted to the antenna 2
1, the frequency of the frequency selection circuit 22 is adjusted to f0. The FM voice signal received at the frequency f0 has the carrier frequency converted from f0 to fa by the frequency converter 23, but the frequency shift width does not change. Where carrier frequency fa
Is a value suitable for the VTR standard, for example, 8 mm VTR
The carrier frequency of the main channel is 1.5MHz
Is. As described above, the carrier frequency, the frequency shift width, the emphasis and the compression of the FM audio signal output from the frequency converter 23 conform to the FM audio recording standard of the VTR. The audio signal output from the frequency converter 23 is mixed with the video luminance signal modulated by the luminance signal recording processing circuit 24 and the video color signal modulated by the color signal recording processing circuit 25 in the adder 26 to obtain the frequency. Recording amplifier 2 multiplexed
After being amplified to an appropriate level by 7, it is recorded on the magnetic tape 29 via the magnetic head 28.

【0016】再生系では、図6の再生系と同様に音声の
再生と復調を行い、出力する。本実施例によれば、マイ
ク部を本体から取り外したときにはVTR本体側で受信
できる範囲内でワイヤレスマイクとして作用するので、
マイク部に機動性をもたせることができる。このような
機能にもかかわらず、本体の記録系では受信した信号を
周波数変換して直接記録できるため、記録系の回路構成
が簡単になり、復調や変調に伴う音質の劣化もマイク内
蔵VTRと同程度に抑えられるという効果を持つ。
The reproduction system reproduces and demodulates sound and outputs the same as in the reproduction system of FIG. According to this embodiment, when the microphone part is detached from the main body, it acts as a wireless microphone within the range that can be received by the VTR main body side.
You can add mobility to the microphone. Despite such a function, the recording system of the main unit can directly convert the received signal by frequency conversion, which simplifies the circuit configuration of the recording system and reduces the sound quality due to demodulation and modulation with the VTR with a built-in microphone. It has the effect of being suppressed to the same level.

【0017】次に、本発明の他の実施例を説明する。こ
の実施例では、マイク部を本体に取り付けたときには通
常のマイク内蔵VTRと同様に作用させ、電源もマイク
側から本体側に切り換えるようにしてマイク側電源の無
駄な消費を抑えるようにするものである。本実施例を図
3に示す。図3(A)と(B)において、マイク部48
がVTR本体49から取り外されているときには、スイ
ッチ50はオンとなり、接点51a,51bには何も接
続されず、マイク部の回路52の電源は内蔵バッテリ5
3より供給されて独立した回路として動作可能である。
また、マイク部48がVTR本体49に取り付けられて
いるときにはスイッチ50がオフとなり、接点51a,
51bには本体側から電源が接続されるので、マイク部
の回路の電源は本体の回路54から供給される。またこ
のときのマイク部と本体との変調音声信号の結合にあた
っては、両者のアンテナによって行える。
Next, another embodiment of the present invention will be described. In this embodiment, when the microphone part is attached to the main body, it operates in the same manner as a normal VTR with a built-in microphone, and the power source is also switched from the microphone side to the main body side to suppress wasteful consumption of the microphone side power source. is there. This embodiment is shown in FIG. In FIGS. 3A and 3B, the microphone unit 48
Is removed from the VTR main body 49, the switch 50 is turned on, nothing is connected to the contacts 51a and 51b, and the circuit 52 of the microphone unit is powered by the built-in battery 5
3 and can operate as an independent circuit.
Further, when the microphone unit 48 is attached to the VTR main body 49, the switch 50 is turned off, and the contacts 51a,
Since the power source is connected to 51b from the main body side, the power source of the microphone circuit is supplied from the main circuit 54. In addition, at this time, the combined voice signal of the microphone unit and the main body can be coupled by both antennas.

【0018】以上の実施例の他、接点をもう1つ設けて
マイク部の変調器(図1のFM変調器14)と本体側の
周波数変換器(図2の周波数変換器23)とを直接ライ
ンで結ぶようにすることもできる。なお、以上の実施例
ではVTRの例をとって説明したが、これに限らず、F
Mで記録するあらゆる音声記録装置に適用できることは
明らかである。
In addition to the above embodiment, another contact is provided to directly connect the modulator of the microphone (FM modulator 14 of FIG. 1) and the frequency converter of the main body (frequency converter 23 of FIG. 2). You can also tie it in a line. In the above embodiments, the VTR has been described as an example, but the present invention is not limited to this, and F
Obviously, it can be applied to any audio recording device for recording with M.

【0019】[0019]

【発明の効果】以上説明したように、本発明によれば、
音声記録装置の記録系にてFM音声信号を何度も復調器
や変調器に通すことなく記録できるので、記録系の構成
が簡単になり、併せて音質の劣化を抑えることができ
る。
As described above, according to the present invention,
Since the FM audio signal can be recorded in the recording system of the audio recording device many times without passing through the demodulator or modulator, the structure of the recording system can be simplified and the deterioration of the sound quality can be suppressed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明によるFM伝送装置の一実施例を示す構
成ブロック図である。
FIG. 1 is a configuration block diagram showing an embodiment of an FM transmission apparatus according to the present invention.

【図2】本発明によるFM受信記録装置の一実施例を示
す構成ブロック図である。
FIG. 2 is a configuration block diagram showing an embodiment of an FM reception recording apparatus according to the present invention.

【図3】本発明の他の実施例による装置構成図である。FIG. 3 is a configuration diagram of an apparatus according to another embodiment of the present invention.

【図4】従来装置における周波数多重された映像色信
号、音声信号、映像輝度信号のスペクトラム図である。
FIG. 4 is a spectrum diagram of frequency-multiplexed video color signals, audio signals, and video luminance signals in a conventional device.

【図5】従来のFM伝送装置の構成ブロック図である。FIG. 5 is a configuration block diagram of a conventional FM transmission device.

【図6】従来のFM受信記録装置の構成ブロック図であ
る。
FIG. 6 is a configuration block diagram of a conventional FM reception recording device.

【図7】従来の再生装置の構成ブロック図である。FIG. 7 is a configuration block diagram of a conventional playback device.

【符号の説明】[Explanation of symbols]

11 マイク 2 マイ
クアンプ 13 ノイズリダクション回路 14 FM変調器 15 出力
アンプ 16 送信アンテナ 21 受信
アンテナ 22 周波数選択回路 23 周波
数変換器 24 輝度信号記録処理回路 25 色信
号記録処理回路 26 加算器 27 記録
アンプ 28 磁気ヘッド 29 磁気
テープ
11 microphone 2 microphone amplifier 13 noise reduction circuit 14 FM modulator 15 output amplifier 16 transmitting antenna 21 receiving antenna 22 frequency selecting circuit 23 frequency converter 24 luminance signal recording processing circuit 25 color signal recording processing circuit 26 adder 27 recording amplifier 28 magnetic Head 29 magnetic tape

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】第1の周波数の搬送波を当該ベースバンド
の信号でFM変調してなる第1のFM変調波として伝搬
するようになされた信号を受信するための受信回路と、 上記受信回路により受信されたFM変調波を上記第1の
周波数よりも低域の第2の周波数の搬送波をFM変調し
てなる第2のFM変調波に変換するための周波数変換回
路と、 上記周波数変換回路の出力たるFM変調信号を適用され
た当該情報記録媒体に記録するためのFM記録回路と、 を有してなることを特徴とするFM受信記録装置。
1. A receiving circuit for receiving a signal adapted to propagate as a first FM modulated wave, which is obtained by FM-modulating a carrier wave of a first frequency with a signal of the base band, and the receiving circuit. A frequency conversion circuit for converting the received FM-modulated wave into a second FM-modulated wave obtained by FM-modulating a carrier having a second frequency lower than the first frequency; An FM receiving / recording apparatus, comprising: an FM recording circuit for recording the output FM modulated signal on the information recording medium to which the signal is applied.
【請求項2】第1の周波数の搬送波を当該ベースバンド
の信号でFM変調してなる第1のFM変調波として伝搬
するようになされた信号を受信するための受信回路と、
上記受信回路により受信されたFM変調波を上記第1の
周波数よりも低域の第2の周波数の搬送波をFM変調し
てなる第2のFM変調波に変換するための周波数変換回
路と、上記周波数変換回路の出力たるFM変調信号を適
用された当該情報記録媒体に記録するためのFM記録回
路と、を有してなるFM受信記録装置に適合するFM伝
送装置であって、 被検出音声に対応する上記ベースバンドの信号を生成す
るためのトランスデューサ回路と、 上記トランスデューサ回路出力によって上記第1の周波
数の搬送波をFM変調してなる第1のFM変調波を形成
するための搬送信号形成回路と、 上記搬送信号形成回路の出力を媒質中に送出せしめるた
めの送出回路と、 上記FM受信記録装置と結合されたときには、上記搬送
信号形成回路の出力たる第1のFM変調波を上記FM受
信記録装置へ入力として供給することを特徴とするFM
伝送装置。
2. A receiving circuit for receiving a signal adapted to propagate as a first FM modulated wave obtained by FM-modulating a carrier wave of a first frequency with a signal of the base band.
A frequency conversion circuit for converting the FM-modulated wave received by the receiving circuit into a second FM-modulated wave formed by FM-modulating a carrier wave of a second frequency lower than the first frequency; An FM transmission device adapted to an FM receiving / recording device, comprising: an FM recording circuit for recording the FM modulated signal output from the frequency conversion circuit on the information recording medium to which the FM modulation signal is applied. A transducer circuit for generating the corresponding baseband signal; and a carrier signal forming circuit for forming a first FM-modulated wave by FM-modulating the carrier wave of the first frequency by the output of the transducer circuit. When combined with a sending circuit for sending the output of the carrier signal forming circuit into the medium and the FM receiving and recording device, the output of the carrier signal forming circuit is output. An FM characterized in that it supplies a first FM modulated wave as an input to the FM receiving and recording device.
Transmission equipment.
JP4185899A 1992-06-19 1992-06-19 Fm receiver-recorder and fm transmitter Withdrawn JPH066751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4185899A JPH066751A (en) 1992-06-19 1992-06-19 Fm receiver-recorder and fm transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4185899A JPH066751A (en) 1992-06-19 1992-06-19 Fm receiver-recorder and fm transmitter

Publications (1)

Publication Number Publication Date
JPH066751A true JPH066751A (en) 1994-01-14

Family

ID=16178832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4185899A Withdrawn JPH066751A (en) 1992-06-19 1992-06-19 Fm receiver-recorder and fm transmitter

Country Status (1)

Country Link
JP (1) JPH066751A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8966767B2 (en) 2006-06-08 2015-03-03 Nsk Ltd. Manufacturing method of a drawn cup needle roller bearing having seal ring
CN115884321A (en) * 2023-02-16 2023-03-31 广州市保伦电子有限公司 WiFi communication method and server for automatic frequency alignment of wireless microphone

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8966767B2 (en) 2006-06-08 2015-03-03 Nsk Ltd. Manufacturing method of a drawn cup needle roller bearing having seal ring
CN115884321A (en) * 2023-02-16 2023-03-31 广州市保伦电子有限公司 WiFi communication method and server for automatic frequency alignment of wireless microphone
CN115884321B (en) * 2023-02-16 2023-05-16 广东保伦电子股份有限公司 WiFi communication method and server for automatic frequency matching of wireless microphone

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Effective date: 19990831