JPS58196606A - Tape noise eliminating method of magnetic tape recorder - Google Patents
Tape noise eliminating method of magnetic tape recorderInfo
- Publication number
- JPS58196606A JPS58196606A JP7756682A JP7756682A JPS58196606A JP S58196606 A JPS58196606 A JP S58196606A JP 7756682 A JP7756682 A JP 7756682A JP 7756682 A JP7756682 A JP 7756682A JP S58196606 A JPS58196606 A JP S58196606A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- tape
- noise
- recording
- main
- 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
- 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)
Abstract
Description
【発明の詳細な説明】
この発明は磁気テープレコーダーの録音用ヘッドが再生
用ヘッドにもなる事を利用し録音時ヘッドよりのテープ
雑音を読み出し読み出した雑音分を逆相にして元の信号
に合わせて録音すれば雑音が除去出来る事に着目したシ
ステムで構成図を図1、図2図3で示す
1)テープ録音構成図の説明
図1、図2については
a)M、AMP1、R、AMP2、AMP3を通りT、
H、とループするメイン信号及バイアス用信号(注5)
b)AMP2、AMP4、Lを通ったサンプル制御信号
(注1)c)OよりAMP5へのバランス用信号(注2
)d)Hよりのテープ雑音読み出し用信号(注3)e)
AMP5にて読み出されAMP6にて増幅されたテープ
雑音除去用信号(注4)
以上a)〜e)の信号系をしてテープ雑音を消去するシ
ステムである
2)テープ再生構成図の説明
図3については
M、AMP1 R、AMP2、AMP3、S、にて再生
するシステムである
3)発明の補足説明
a)(注4)信号はメイン録音信号に対して逆相になる
様に■入する
b)Lはヘッドのインピーダンスに合わせテープによる
雑音信号のみを選び出す為に置く(チョークコイル、ト
ランス等を使用する)
c)図2はREC部の具体的回路例であるd)各増幅器
の増幅特性はリニアリティである場合の回路構成であっ
て乗数特性の入る場合は特性を合わせる必要がある[Detailed Description of the Invention] This invention takes advantage of the fact that the recording head of a magnetic tape recorder also functions as a playback head, reads tape noise from the head during recording, reverses the phase of the read noise, and converts it into the original signal. The system focuses on the fact that noise can be removed by recording together, and the configuration diagrams are shown in Figures 1, 2, and 3. 1) Explanation of the tape recording configuration diagram Regarding Figures 1 and 2, a) M, AMP1, R, T through AMP2 and AMP3,
Main signal and bias signal looped with H (Note 5)
b) Sample control signal passed through AMP2, AMP4, and L (Note 1) c) Balance signal from O to AMP5 (Note 2)
) d) Signal for reading tape noise from H (Note 3) e)
Tape noise removal signal read out by AMP5 and amplified by AMP6 (Note 4) Explanatory diagram of 2) Tape playback configuration diagram, which is a system for eliminating tape noise using the signal systems a) to e) above. Regarding 3, it is a system that plays back on M, AMP1 R, AMP2, AMP3, and S. 3) Supplementary explanation of the invention a) (Note 4) The signal is input so that it has the opposite phase to the main recording signal. b) L is placed to match the impedance of the head and select only the noise signal from the tape (use a choke coil, transformer, etc.) c) Figure 2 is a specific circuit example of the REC section d) Amplification characteristics of each amplifier is the circuit configuration for linearity, and if multiplier characteristics are included, the characteristics must be matched.
M−マイクロホン、プレーヤ、チーナー等(入力信号元
)AMP1−前置増幅器(イコライザー回路)R−可変
抵抗器
AMP2−前置増幅器
AMP3−メイン増幅器
AMP4−前置増幅器
L−インピーダンスバランサー(チョークコイル、トラ
ンス等)O−バイアス発振器
AMP5−差動増幅器
AMP6−増幅器
REC−ヘッド及カップリングトランス等の回路H−ヘ
ッド
TE−テープ
T−カップリングトランス
S−スピーカー
F−バイアスフィルターM - Microphone, player, tuner, etc. (input signal source) AMP1 - Preamplifier (equalizer circuit) R - Variable resistor AMP2 - Preamplifier AMP3 - Main amplifier AMP4 - Preamplifier L - Impedance balancer (choke coil, transformer etc.) O - Bias oscillator AMP5 - Differential amplifier AMP6 - Amplifier REC - Circuits such as head and coupling transformer H - Head TE - Tape T - Coupling transformer S - Speaker F - Bias filter
Claims (1)
成にてテープ雑音を除去するものについてAbout removing tape noise with the circuit configuration shown in Figures 1 and 2 using a magnetic head for both recording and playback.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7756682A JPS58196606A (en) | 1982-05-11 | 1982-05-11 | Tape noise eliminating method of magnetic tape recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7756682A JPS58196606A (en) | 1982-05-11 | 1982-05-11 | Tape noise eliminating method of magnetic tape recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58196606A true JPS58196606A (en) | 1983-11-16 |
Family
ID=13637556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7756682A Pending JPS58196606A (en) | 1982-05-11 | 1982-05-11 | Tape noise eliminating method of magnetic tape recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58196606A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0693202A1 (en) * | 1993-04-09 | 1996-01-24 | Washington University | Method and apparatus for noise reduction in magnetic media |
US5959794A (en) * | 1993-04-09 | 1999-09-28 | Washington University | Method for precompensating signals for magnetic media noise |
-
1982
- 1982-05-11 JP JP7756682A patent/JPS58196606A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0693202A1 (en) * | 1993-04-09 | 1996-01-24 | Washington University | Method and apparatus for noise reduction in magnetic media |
EP0693202A4 (en) * | 1993-04-09 | 1996-02-07 | ||
JPH08508842A (en) * | 1993-04-09 | 1996-09-17 | ワシントン ユニヴァーシティ | Method and apparatus for reducing noise on magnetic media |
US5959794A (en) * | 1993-04-09 | 1999-09-28 | Washington University | Method for precompensating signals for magnetic media noise |
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