JPH0366063U - - Google Patents
Info
- Publication number
- JPH0366063U JPH0366063U JP12414789U JP12414789U JPH0366063U JP H0366063 U JPH0366063 U JP H0366063U JP 12414789 U JP12414789 U JP 12414789U JP 12414789 U JP12414789 U JP 12414789U JP H0366063 U JPH0366063 U JP H0366063U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- band
- circuit
- limiting
- audio
- 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 description 6
- 239000000284 extract Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Description
第１図は本考案のノイズ低減装置の電気的構成
を示すブロツク線図、第２図は復調回路から出力
された再生音声信号の波形図、第３図は第２図に
示す再生音声信号に含まれるノイズ成分を拡大し
た図、第４図は帯域制限フイルタの出力である高
域ノイズ成分を示す図、第５図はローパスフイル
タの出力であるノイズ成分が低減された再生音声
信号の波形図、第６図は従来のスイツチングノイ
ズ低減回路の電気的構成を示すブロツク線図、第
７図は従来のスイツチングノイズ低減回路の各部
の動作を説明するための波形図である。
１，２……磁気ヘツド、３，４……アンプ、５
……信号切換スイツチ、６……復調回路、７……
減算回路、８……帯域制限フイルタ。
Figure 1 is a block diagram showing the electrical configuration of the noise reduction device of the present invention, Figure 2 is a waveform diagram of the reproduced audio signal output from the demodulation circuit, and Figure 3 is the waveform diagram of the reproduced audio signal shown in Figure 2. Figure 4 is an enlarged view of the included noise components. Figure 4 is a diagram showing the high-frequency noise component that is the output of the band-limiting filter. Figure 5 is a waveform diagram of the reproduced audio signal with the noise component output from the low-pass filter reduced. , FIG. 6 is a block diagram showing the electrical configuration of a conventional switching noise reduction circuit, and FIG. 7 is a waveform diagram for explaining the operation of each part of the conventional switching noise reduction circuit. 1, 2...Magnetic head, 3, 4...Amplifier, 5
...Signal changeover switch, 6...Demodulation circuit, 7...
Subtraction circuit, 8...bandwidth limiting filter.
Claims (1)
り、音声帯域の信号に従つて変調された搬送波の
記録と再生とを行う磁気記録再生装置において、 前記２つの磁気ヘツドを交互に切り換えること
により、それぞれのヘツドから取り出された音声
帯域の再生ＦＭ信号を連続した１つの再生音声信
号として出力する復調回路と、 該復調回路から出力された再生音声信号から音
声帯域の信号を除去するとともに、除去後の信号
の帯域を制限することによりノイズ成分を取り出
す帯域制限回路と、 前記復調回路より出力された再生音声信号から
前記帯域制限回路によつて取り出されたノイズ成
分を差し引くことにより、ノイズ成分を除去した
再生音声信号を得る減算回路と を備えたことを特徴とするノイズ低減装置。[Claims for Utility Model Registration] In a magnetic recording and reproducing device that records and reproduces a carrier wave modulated according to an audio band signal by alternately switching two magnetic heads, a demodulation circuit that outputs the reproduced FM signal in the audio band extracted from each head as one continuous reproduced audio signal by switching to the FM signal, and a demodulation circuit that removes the audio band signal from the reproduced audio signal output from the demodulation circuit. and a band-limiting circuit that extracts the noise component by limiting the band of the signal after removal; and a band-limiting circuit that extracts the noise component by limiting the band of the signal after removal; 1. A noise reduction device comprising: a subtraction circuit for obtaining a reproduced audio signal from which noise components have been removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12414789U JPH0366063U (en) | 1989-10-24 | 1989-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12414789U JPH0366063U (en) | 1989-10-24 | 1989-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366063U true JPH0366063U (en) | 1991-06-27 |
Family
ID=31672087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12414789U Pending JPH0366063U (en) | 1989-10-24 | 1989-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366063U (en) |
-
1989
- 1989-10-24 JP JP12414789U patent/JPH0366063U/ja active Pending
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