JPS619808A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS619808A
JPS619808A JP12931384A JP12931384A JPS619808A JP S619808 A JPS619808 A JP S619808A JP 12931384 A JP12931384 A JP 12931384A JP 12931384 A JP12931384 A JP 12931384A JP S619808 A JPS619808 A JP S619808A
Authority
JP
Japan
Prior art keywords
audio signal
audio
level
gain control
control part
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
Application number
JP12931384A
Other languages
Japanese (ja)
Inventor
Kanji Yoshikawa
寛治 吉川
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12931384A priority Critical patent/JPS619808A/en
Publication of JPS619808A publication Critical patent/JPS619808A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback

Abstract

PURPOSE:To obtain a device which sends good sounds to a television when a wide-range audio level is handled, by providing a video tape recorder having the Hi-Fi function with an automatic gain control part which controls automatically the gain of the audio input level of an RF modulator. CONSTITUTION:The RF audio signal received by an antenna is demodulated to an audio signal by an RF demodulating part 1, and either of this signal and the audio signal from a line input is selected by an input selecting part 2, and the manual operation or the automatic operation is selected for the level control of the audio signal from the selecting part 2 by a switch SW1. The audio signal passing an automatic gain control part 3 or a manual gain control part 7 is subjected to a processing corresponding to the mode of recording, reproducing, stop, or the like of the device by an audio processing part 4, and the audio signal is sent to an audio head 5, an automatic gain control part 8, and a line output. The control part 8 sets the input level varied in a wide range to a proper level and sends this set level to an RF modulating part 6, and the audio signal is modulated to an RF modulated signal there.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、１４ｉ−ｐｉ機能を有するビデオテープレコ
ーダに係り、特に録音レベルのコントロールを有する装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a video tape recorder having 14i-pi functionality, and more particularly to a device having recording level control.

〔発明の背景〕[Background of the invention]

従来のビデオテープレコーダにおいては、音声系のシス
テムは、第１図の如く構成されている。In a conventional video tape recorder, the audio system is constructed as shown in FIG.

各ブロックの動作は実施例において説明する。The operation of each block will be explained in the embodiment.

このシステムにおいて、ｓｒｌがＢと接続している時は
、録音レベルは、手動で調整され、低レベルで入力され
る音声信号を十分なレベルに増幅し記録する。これによ
り広い範囲に渡って音声信号を扱えるが、逆に６０ＲＦ
変調部の動作が、この広い動作範囲に対応しきれない。In this system, when srl is connected to B, the recording level is manually adjusted, and the audio signal input at a low level is amplified to a sufficient level and recorded. This allows audio signals to be handled over a wide range, but on the other hand, 60RF
The operation of the modulation section cannot accommodate this wide operating range.

即ち非常に高いレベルが、６０ＲＦ変調部に入力された
りすると過変調型であるとか、映像へのビート妨害がで
る。That is, if a very high level is input to the 60RF modulation section, it may cause overmodulation or beat disturbance to the video.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、広い範囲の音声レベルを扱う際に、良
好な音声をテレビに送る装置を提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a device for transmitting good sound to a television when handling a wide range of sound levels.

〔発明の概要〕[Summary of the invention]

本発明はＨｉ−Ｆｉ機能を有するビデオテープレコーダ
において、ＲＦ変調器の音声入力レベルを自動で利得制
御する、自動利得制御部を設けたことを特徴とするもの
である。The present invention is a video tape recorder having a Hi-Fi function, which is characterized by being provided with an automatic gain control section that automatically controls the gain of the audio input level of the RF modulator.

〔発明の実施例〕[Embodiments of the invention]

第２図は、本発明の一実施例である。 FIG. 2 is an embodiment of the present invention.

本発明に関係する部分の音声システムのみ抜書している
。アンテナで受信されたＲＦ音声信号は、１０ＲＦ復調
部で音声信号となり、２の入力選択部で、ライン入力か
らの音声信号と、どちらか一方が選択されＳＷｌで２か
らの音声信号のレベル制御を手動か自動で行なう選択を
行なう。３は自動利得制御部であり、７は手動利得制御
部である。３或いは７を経由した音声信号は、４の音声
処理部で録音、再生、停止等の装置のモードに応じた処
理を行ない、５の音声ヘッド、８の自動利得制御部さら
にライン出力へ音声信号を送る。８においては、広範囲
に変化する入力レベルを適切なレベルに設定し、６０Ｒ
Ｆ変調部に送り、ここで音声信号は変調されＲＦ変調信
号となる。これにより、広範囲の音声レベル特にレベル
の高い音声信号に対しても、ＥＦ変調部の入力レベルは
適切なレベルに設定され、過変調型、映像のビート妨害
を防ぐことができる。Only the parts of the audio system related to the present invention are omitted. The RF audio signal received by the antenna becomes an audio signal in the 10RF demodulation section, and the input selection section 2 selects either the audio signal from the line input or the audio signal from the line input, and SWl controls the level of the audio signal from 2. Make a selection to do it manually or automatically. 3 is an automatic gain control section, and 7 is a manual gain control section. The audio signal that has passed through 3 or 7 is processed according to the mode of the device, such as recording, playback, or stop, in the audio processing section 4, and then sent to the audio head 5, automatic gain control section 8, and then to the line output. send. 8, the input level that changes over a wide range is set to an appropriate level, and the 60R
The audio signal is sent to the F modulation section, where the audio signal is modulated to become an RF modulation signal. As a result, the input level of the EF modulation section is set to an appropriate level even for a wide range of audio levels, particularly for high-level audio signals, and it is possible to prevent overmodulation and video beat interference.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、音声の変調度が、適切な値に制御でき
るので、過変調型、映像妨害がなくなる効果がある。According to the present invention, since the degree of modulation of audio can be controlled to an appropriate value, there is an effect that overmodulation type and video interference are eliminated.

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

第１図は従来技術の実施例を示すプロ・ンク図、第２図
は本発明による実施例を示すブロック図である。 １・・・ＲＦ復調部、 ２・・・入力選択部、 ３・・・自動利得制御部、 ５・・・音声ヘッド、 ６・・・ＲＦ変調部、 ７・・・手動利得制御部、 ８・・・自動利得制御部。FIG. 1 is a block diagram showing an embodiment of the prior art, and FIG. 2 is a block diagram showing an embodiment according to the present invention. DESCRIPTION OF SYMBOLS 1... RF demodulation section, 2... Input selection section, 3... Automatic gain control section, 5... Audio head, 6... RF modulation section, 7... Manual gain control section, 8 ...Automatic gain control section.

Claims (1)

【特許請求の範囲】[Claims] （１）Ｈｉ−Ｆｉ機能を有するビデオテープレコーダに
おいて、ＲＦ変調器の音声入力レベルを自動で利得制御
する、自動利得制御部を設けたことを特徴とする磁気記
録再生装置。(1) A magnetic recording and reproducing device characterized in that a video tape recorder having a Hi-Fi function is provided with an automatic gain control section that automatically controls the gain of the audio input level of an RF modulator.
JP12931384A 1984-06-25 1984-06-25 Magnetic recording and reproducing device Pending JPS619808A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12931384A JPS619808A (en) 1984-06-25 1984-06-25 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12931384A JPS619808A (en) 1984-06-25 1984-06-25 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS619808A true JPS619808A (en) 1986-01-17

Family

ID=15006479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12931384A Pending JPS619808A (en) 1984-06-25 1984-06-25 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS619808A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06276894A (en) * 1993-03-24 1994-10-04 Izui Tekkosho:Kk Method for collecting cultured lugworm and washing sand and its apparatus
JPH07274769A (en) * 1994-04-12 1995-10-24 Toshiba Denpa Totsuki Kk Pisciculture pond cleaning device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06276894A (en) * 1993-03-24 1994-10-04 Izui Tekkosho:Kk Method for collecting cultured lugworm and washing sand and its apparatus
JPH07274769A (en) * 1994-04-12 1995-10-24 Toshiba Denpa Totsuki Kk Pisciculture pond cleaning device

Similar Documents

Publication Publication Date Title
US4394691A (en) Remote control system
JPS619808A (en) Magnetic recording and reproducing device
JPS6123715B2 (en)
JPS6130357Y2 (en)
US6385390B1 (en) Hi-Fi audio signal recording/playback apparatus using video heads
JPS60121886A (en) Magnetic video-recording and reproducing device
JPS60197904A (en) Magnetic recording and reproducing device
EP0735539A1 (en) Double deck video cassette tape recorder
KR0115160Y1 (en) Hifi audio double deck recording and reproducing apparatus
KR100191494B1 (en) Recording circuit for recording hifi audio signal of a double deck vcr
KR200155000Y1 (en) Dual's Dubbing Circuit
JPH0535667Y2 (en)
JPH0739090Y2 (en) Sound quality improvement circuit
KR940011686B1 (en) Video tape recorder
KR200155395Y1 (en) Audio optimal hearing circuit for hifi vcr
JPS5823372A (en) Tape recorder with radio receiver
JPH06162412A (en) Magnetic recorder
JPS59194578A (en) Video tape recorder
JPH03122868A (en) Video tape recorder
JPH03119502A (en) Audio signal dubbing system
JPH01276470A (en) Magnetic recording and reproducing device
JPS60237601A (en) Magnetic recording and reproducing device
JPS63117304A (en) Magnetic recording and reproducing device
JPH07307900A (en) External input signal processing circuit in television receiver with integrated vtr
JPH05145879A (en) Signal processing circuit for reproduction of vtr