JPS6098507A - Automatic switching device of noise reduction circuit - Google Patents
Automatic switching device of noise reduction circuitInfo
- Publication number
- JPS6098507A JPS6098507A JP20626383A JP20626383A JPS6098507A JP S6098507 A JPS6098507 A JP S6098507A JP 20626383 A JP20626383 A JP 20626383A JP 20626383 A JP20626383 A JP 20626383A JP S6098507 A JPS6098507 A JP S6098507A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- noise reduction
- reduction circuit
- selection signal
- recording
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、テープレコーダなどの記録・再生機器に使
用するノイズリダクション（雑音減少）回路自動切換装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an automatic noise reduction circuit switching device used in recording/reproducing equipment such as tape recorders.
従来例の構成とその問題点
従来にあっては、ノイズリダクション回路の切換えは、
そのノイズリダクション回路方式に合わせて手動により
スイッチを切換えることにより行うものであった。Conventional configuration and its problems Conventionally, switching of the noise reduction circuit was done by
This was done by manually switching a switch according to the noise reduction circuit system.
以下、従来のノイズリダクション回路の選択切換装置に
ついて説明する。A conventional noise reduction circuit selection switching device will be described below.
第１図および第２図は従来のノイズリダクション回路の
選択切換装置の構成図であり、１は記録用ヘッド、２は
記録系増幅器、３はノイズリダクション回路（Ａ方式）
、４は記録系のノイズリダクション回路（Ｂ方式）、５
は記録系のノイズリダクション回路を通さない回路、６
は記録用信号入力端子、７は記録系ノイズリダクション
回路選折用の切換スイッチ、８は再生用ヘッド、９は再
生系増幅器、ｌＯは再生系のノイズリダクション回路（
Ａ方式）、１１は再生系のノイズリダクション回路（Ｂ
方式）、１２はノイズリダクション回路を通さない回路
、１３は再生信号出力端子、１４は再生系のノイズリダ
クション回路選択用の切換スイッチである。1 and 2 are configuration diagrams of a conventional noise reduction circuit selection switching device, in which 1 is a recording head, 2 is a recording system amplifier, and 3 is a noise reduction circuit (A method).
, 4 is a recording system noise reduction circuit (B method), 5
is a circuit that does not pass through the recording system noise reduction circuit, 6
is a recording signal input terminal, 7 is a selector switch for selecting a recording system noise reduction circuit, 8 is a playback head, 9 is a playback system amplifier, and lO is a playback system noise reduction circuit (
A method), 11 is a reproduction system noise reduction circuit (B
12 is a circuit that does not pass through the noise reduction circuit, 13 is a reproduction signal output terminal, and 14 is a changeover switch for selecting the noise reduction circuit of the reproduction system.
以上のように構成された従来のノイズリダクション回路
の選択切換装置について、以下その動作を説明する。The operation of the conventional noise reduction circuit selection switching device configured as described above will be described below.
まず記録用信号入力端子６から入った信号をノイズリダ
クション回路（Ａ方式）３、ノイズリダクション回路（
Ｂ方式）４およびノイズリダクション回路を通さない回
路５に加え、記録系のノイズリダクション回路選択用の
切換スイッチ７で記録系のノイズリダクション回路（Ａ
方式）３、記録系のノイズリダクション回路（Ｂ方式）
４あるいはノイズリダクション回路を通さない回路５を
選択し、記録系増幅器２でその信号を増幅し、記録用ヘ
ッド１を介して磁気テープなどの記録媒体に記録する。First, the signal input from the recording signal input terminal 6 is sent to the noise reduction circuit (method A) 3, and the noise reduction circuit (
In addition to the circuit 5 that does not pass through the noise reduction circuit (B method) 4 and the noise reduction circuit, the recording system noise reduction circuit (A
Method) 3. Recording system noise reduction circuit (B method)
4 or a circuit 5 that does not pass through a noise reduction circuit, the signal is amplified by a recording system amplifier 2, and recorded on a recording medium such as a magnetic tape via a recording head 1.
次に、上記の記録された記録媒体の信号を再生用ヘッド
８を介し、再生系増幅器９で増幅して、再生系のノイズ
リダクション回路選択用の切換スイッチ１４で記録した
のと同じ方式の再生系のノイズリダクション回路（Ａ方
式）１０、再生系のノイズリダクション回路（Ｂ方式）
１１あるいはノイズリダクション回路を通さない回路１
２を選択し、再生信号を得て出力端子１３から出力して
いた。Next, the recorded signal of the recording medium is amplified by the reproduction system amplifier 9 via the reproduction head 8, and reproduced in the same manner as the recording using the changeover switch 14 for selecting the noise reduction circuit of the reproduction system. System noise reduction circuit (A method) 10, Reproduction system noise reduction circuit (B method)
11 or circuit 1 that does not pass through the noise reduction circuit
2 was selected, a reproduced signal was obtained and outputted from the output terminal 13.
しかしながら、上記のような構成では、再生時のノイズ
リダクション回路方式の選択は切換装置、すなわちスイ
ッチ１４を手動操作することによって行っていたので、
誤操作により誤動作を招くという問題点を有していた。However, in the above configuration, the selection of the noise reduction circuit method during playback is performed by manually operating the switching device, that is, the switch 14.
This has had the problem of causing malfunctions due to erroneous operation.
発明の目的
この発明の目的は、ノイズリダクション回路方式の選択
の誤まりがなく、誤動作を生しないノイズリダクション
回路自動切換装置を提供することである。OBJECTS OF THE INVENTION An object of the present invention is to provide an automatic noise reduction circuit switching device that does not make mistakes in selecting a noise reduction circuit system and does not cause malfunctions.
発明の構成
この発明のノイズリダクション回路自動切換装置は、理
解を助けるため実施例に係る第３図および第４図に用い
た符号を引用しながら記すと、（ａｌ記録系のノイズリ
ダクション回路３，４選択用の切換スイッチ１９と、
（ｂ）記録系切換制御信号に基いて記録用ヘッド１に対
する前記記録系のノイズリダクション回路３゜４の接続
状態を変更する記録系自動切換回路１５と、
（Ｃ）前記切換スイッチ１９に接続して選択信号を前記
記録用ヘッド１に出力するとともに前記記録系の自動切
換回路１５に前記記録系切換制御信号を出力するノイズ
リダクション回路選択信号・切換制御信号発生回路１６
と、
（ｄ）再生系切換制御信号に基いて再生用ヘッド８に対
する再生系のノイズリダクション回路１０゜１１の接続
状態を変更する再生系の自動切換回路２０と、
ｔｅｌ記録媒体に記録された前記選択信号を前記再生用
ヘッド８から入力して検出する選択信号検出回路２１と
、
（ｆ）この検出回路２１による検出選択信号を入力して
前記再生系の自動切換回路２０に前記再生系切換制御信
号を出力する制御回ｌｌ！＆２２とを備えたものである
。Structure of the Invention The automatic noise reduction circuit switching device of the present invention is described by referring to the reference numerals used in FIGS. 3 and 4 according to the embodiment to facilitate understanding. (b) a recording system automatic switching circuit 15 that changes the connection state of the noise reduction circuit 3.4 of the recording system to the recording head 1 based on a recording system switching control signal; C) Noise reduction circuit selection signal/switching control signal generation that is connected to the changeover switch 19 and outputs a selection signal to the recording head 1, and also outputs the recording system switching control signal to the recording system automatic switching circuit 15. circuit 16
(d) a reproduction system automatic switching circuit 20 that changes the connection state of the reproduction system noise reduction circuit 10 and 11 to the reproduction head 8 based on a reproduction system switching control signal; (f) a selection signal detection circuit 21 for inputting and detecting a selection signal from the reproduction head 8; and (f) inputting the selection signal detected by this detection circuit 21 and controlling the reproduction system switching circuit 20 for the reproduction system automatic switching circuit 20; Control circuit that outputs a signal! &22.
この記述中、記録系のノイズリダクション回路に付した
３、４および再生系のノイズリダクション回路に付した
１０．１１はあくまで例示であり、これらとともに、あ
るいはこれらのうちの何れ力）一方とともに、ノイズリ
ダクション回路を通さない回路５，１２を含むように構
成したものや、３つ以上のノイズリダクション回路を含
むようＧこ構成したものもこの発明に含まれる。In this description, 3 and 4 attached to the noise reduction circuit of the recording system and 10.11 attached to the noise reduction circuit of the reproduction system are just examples. The present invention also includes a configuration that includes circuits 5 and 12 that do not pass through the reduction circuit, and a configuration that includes three or more noise reduction circuits.
この発明の上記構成によると、記録の際にノイズリダク
ション回路の選択信号を記録媒体Ｇこ記録し、再生時に
その記録された選択信号を検出して、これに対応するノ
イズリダクション回路を自動０勺に再生用ヘッドに接続
するから、人為操作（ま不要であり、また誤操作のおそ
れもなし）。According to the above configuration of the present invention, the selection signal of the noise reduction circuit is recorded on the recording medium G during recording, and the recorded selection signal is detected during playback, and the corresponding noise reduction circuit is automatically zeroed. Since it is connected to the playback head, no manual operation is required (and there is no risk of erroneous operation).
実施例の説明
第３図および第４図は、この発明の一実施例におけるノ
イズリダクション回路自動切換装置のブロック図である
。第３図、第４図において、１５は録音系（記録系）の
自動切換回路、１６は選択信号・切換制御信号発生回路
、１７は選択信号出力ライン、１８は録音系（記録系）
の切換制御信号出力ライン、１９は録音系（記録系）の
ノイズリダクション回路選択用の切換スイッチ、２ｏは
再生系の自動切換回路、２１は選択信号検出回路、２２
は再生系自動切換制御回路、２３は再生選択信号入力ラ
イン、２４は再生系の自動切換制御信号出力ラインであ
る。DESCRIPTION OF EMBODIMENTS FIGS. 3 and 4 are block diagrams of an automatic noise reduction circuit switching device according to an embodiment of the present invention. In Figures 3 and 4, 15 is an automatic switching circuit for the recording system (recording system), 16 is a selection signal/switching control signal generation circuit, 17 is a selection signal output line, and 18 is a recording system (recording system).
19 is a changeover switch for selecting a noise reduction circuit for the recording system, 2o is an automatic switching circuit for the playback system, 21 is a selection signal detection circuit, 22
Reference numeral 23 denotes a reproduction system automatic switching control circuit, 23 a reproduction selection signal input line, and 24 an automatic reproduction system switching control signal output line.
なお、１は録音用（記録用）ヘッド、２は録音系（記録
系）増幅器、３は録音系（記録系）のノイズリダクショ
ン回路（Ａ方式）、４は録音系（記録系）のノイズリダ
クション回路（Ｂ方式）、５はノイズリダクション回路
を通さない回路、６は録音用信号入力端子、８は再生用
ヘッド、９は再生系増幅器、ｌｏは再生系のノイズリダ
クション回路（Ａ方式）、１１は再生系のノイズリダク
ション回路（Ｂ方式）、１２はノイズリダクション回路
を通さない回路、１３は再生信号出力端子で、これらは
従来例の構成と同様のものである。In addition, 1 is the recording head (for recording), 2 is the recording system (recording system) amplifier, 3 is the noise reduction circuit (A method) for the recording system (recording system), and 4 is the noise reduction for the recording system (recording system). circuit (B method), 5 is a circuit that does not pass through the noise reduction circuit, 6 is a recording signal input terminal, 8 is a playback head, 9 is a playback system amplifier, lo is a playback system noise reduction circuit (A method), 11 Reference numeral 12 denotes a reproduction system noise reduction circuit (B method), 12 a circuit that does not pass through the noise reduction circuit, and 13 a reproduction signal output terminal, which are similar in structure to the conventional example.
以上のように構成された本実施例のノイズリダクション
回路自動切換装置について、その動作を説明する。The operation of the noise reduction circuit automatic switching device of this embodiment configured as described above will be explained.
まず、希望するノイズリダクション回路方式をノイズリ
ダクション回路選択用の切換スイッチＩ９で選択すると
、選択信号・切換制御信号発生回路１６から選択信号出
力ライン１７に信号が現れるので、この信号を録音して
おく。選択信号出力と同時に切換制御信号が録音系の自
動切換回路１５に送られてこの回路１５が動作し、希望
のノイズリダクション回路方式を選択し、選択したノイ
ズリダクション回路（Ａ方式）３、ノイズリダクション
回路（Ｂ方式）４あるいはノイズリダクション回路を通
さない回路５のいずれかの回路を録音用信号が通り、録
音系の自動切換回路１５と、録音系増幅器２で増幅され
、録音用ヘッド１を介して磁気テープ（記録媒体）に録
音する。First, when the desired noise reduction circuit system is selected using the noise reduction circuit selection selector switch I9, a signal appears from the selection signal/switching control signal generation circuit 16 to the selection signal output line 17, so record this signal. . At the same time as the selection signal is output, a switching control signal is sent to the automatic switching circuit 15 of the recording system, this circuit 15 operates, selects the desired noise reduction circuit system, and selects the selected noise reduction circuit (method A) 3. The recording signal passes through either the circuit (B method) 4 or the circuit 5 that does not pass through the noise reduction circuit, is amplified by the recording system automatic switching circuit 15 and the recording system amplifier 2, and is sent via the recording head 1. and record it on magnetic tape (recording medium).
次に、上記で録音された磁気テープの信号を再生ヘッド
８を介し再生系増幅器９で増幅する。ここで再生選択信
号入力ライン２３に入った選択信号を選択信号検出回路
２１へ導き、再生系の自動切換制御回路２２で自動切換
制御信号を発生し再生系の自動切換制御信号出力ライン
２４を通し、再生系の自動切換回路２０へ入力する。こ
れによって、選択されるべきノイズリダクション回路が
自動切換回路２０により自動的に選択される。Next, the magnetic tape signal recorded above is amplified by a reproduction system amplifier 9 via a reproduction head 8. Here, the selection signal that has entered the reproduction selection signal input line 23 is guided to the selection signal detection circuit 21, and the reproduction system automatic switching control circuit 22 generates an automatic switching control signal, which is passed through the reproduction system automatic switching control signal output line 24. , is input to the automatic switching circuit 20 of the reproduction system. As a result, the noise reduction circuit to be selected is automatically selected by the automatic switching circuit 20.
一方、再生用増幅器９で増幅された再生信号は、再生系
の自動切換回路２０を通り、すでに自動的に切換えられ
ている所定の再生系のノイズリダクション回路（Ａ方式
）１０、再生系のノイズリダクション回路（Ｂ方式）１
１あるいはノイズリダクション回路を通さない回路１２
のいずれかの回路を通り再生信号出力端子１４から出力
される。On the other hand, the playback signal amplified by the playback amplifier 9 passes through the playback system automatic switching circuit 20, which has already been automatically switched to a predetermined playback system noise reduction circuit (method A) 10, and the playback system noise Reduction circuit (B method) 1
1 or circuit 12 that does not pass through the noise reduction circuit
The reproduced signal passes through one of the circuits and is output from the reproduced signal output terminal 14.
以上のように本実施例によれば、選択信号・切換制御信
号発生回路１６からの選択信号を録音しておき、再生時
には再生選択信号を利用して選択信号検出回路２１、再
生系の自動切換制御回路２２により再生系の切換制御信
号を作り、この信号を自動切換回路２０に入力すること
によりノイズリダクション回路方式の選択切換えを行う
ので、テープレコーダの再生時における所定のノイズリ
ダクション回路方式を自動的に、かつ、正確に選択する
ことができる。As described above, according to this embodiment, the selection signal from the selection signal/switching control signal generation circuit 16 is recorded, and during playback, the selection signal detection circuit 21 uses the playback selection signal to automatically switch the playback system. The control circuit 22 generates a switching control signal for the playback system, and this signal is input to the automatic switching circuit 20 to select and switch the noise reduction circuit system, so that the predetermined noise reduction circuit system is automatically selected during playback by the tape recorder. can be selected accurately and accurately.
発明の効果
この発明のノイズリダクション回路自動切換装置によれ
ば、再生時に、所定のノイズリダクション回路方式を自
動的に選択するから、人為操作の煩わしさがなく、誤操
作のおそれもないという効果がある。Effects of the Invention According to the noise reduction circuit automatic switching device of the present invention, since a predetermined noise reduction circuit method is automatically selected during playback, there is no need for troublesome human operations and there is no risk of erroneous operation. .
第１図は従来例の装置の録音回路のブロック図、第２図
はその再生回路のブロック図、第３図はこの発明の一実
施例を示す録音回路のブロック図、第４図はその再生回
路のブロック図である。
３．４−−一録音系（記録系）のノイズリダクション回
路、１０．１１・−再生系のノイズリダクション回路、
１５録音系（記録系）の自動切換回路、１６−・・ノイ
ズリダクション回路選択信号・切換制御信号発生回路、
１９・・−切換スイッチ、２ｏ−・−再生系の自動切換
回路、２１・−選択信号検出回路、２２・−制御回路FIG. 1 is a block diagram of a recording circuit of a conventional device, FIG. 2 is a block diagram of its playback circuit, FIG. 3 is a block diagram of a recording circuit showing an embodiment of the present invention, and FIG. 4 is a block diagram of its playback circuit. FIG. 2 is a block diagram of the circuit. 3.4--Noise reduction circuit for recording system (recording system), 10.11--Noise reduction circuit for playback system,
15 Automatic switching circuit for recording system (recording system), 16-...Noise reduction circuit selection signal/switching control signal generation circuit,
19.--Selector switch, 2o--Regeneration system automatic switching circuit, 21.--Selection signal detection circuit, 22.--Control circuit
Claims (1)
と、記録系切換制御信号に基いて記録用ヘッドに対する
前記記録系のノイズリダクション回路の接続状態を変更
する記録系の自動切換回路と、前記切換スイッチに接続
して選択信号を前記記録用ヘッドに出力するとともに前
記記録系の自動切換回路に前記記録系切換制御信号を出
力するノイズリダクション回路選択信号・切換制御信号
発生回路と、再生系切換制御信号に基いて再生用ヘッド
に対する再生系のノイズリダクション回路の接続状態を
変更する再生系の自動切換回路と、記録媒体に記録され
た前記選択信号を前記再生用ヘッドから入力して検出す
る選択信号検出回路と、この検出回路による検出選択信
号を入力して前記再生系の自動切換回路に前記再生系切
換制御信号を出力する制御回路とを備えたノイズリダク
ション回路自動切換装置。a changeover switch for selecting a recording system noise reduction circuit; a recording system automatic changeover circuit that changes the connection state of the recording system noise reduction circuit to the recording head based on a recording system changeover control signal; a noise reduction circuit selection signal/switching control signal generation circuit connected to output a selection signal to the recording head and output the recording system switching control signal to the automatic switching circuit of the recording system, and a reproduction system switching control signal. a reproduction system automatic switching circuit that changes the connection state of the reproduction system noise reduction circuit to the reproduction head based on the reproduction head; and a selection signal detection circuit that inputs and detects the selection signal recorded on the recording medium from the reproduction head. and a control circuit which inputs the detection selection signal from the detection circuit and outputs the reproduction system switching control signal to the reproduction system automatic switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20626383A JPS6098507A (en) | 1983-11-01 | 1983-11-01 | Automatic switching device of noise reduction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20626383A JPS6098507A (en) | 1983-11-01 | 1983-11-01 | Automatic switching device of noise reduction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6098507A true JPS6098507A (en) | 1985-06-01 |
Family
ID=16520429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20626383A Pending JPS6098507A (en) | 1983-11-01 | 1983-11-01 | Automatic switching device of noise reduction circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6098507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02227871A (en) * | 1989-03-01 | 1990-09-11 | Pioneer Electron Corp | Noise reduction switching circuit |
-
1983
- 1983-11-01 JP JP20626383A patent/JPS6098507A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02227871A (en) * | 1989-03-01 | 1990-09-11 | Pioneer Electron Corp | Noise reduction switching circuit |
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