JPH0181761U - - Google Patents
Info
- Publication number
- JPH0181761U JPH0181761U JP1987175951U JP17595187U JPH0181761U JP H0181761 U JPH0181761 U JP H0181761U JP 1987175951 U JP1987175951 U JP 1987175951U JP 17595187 U JP17595187 U JP 17595187U JP H0181761 U JPH0181761 U JP H0181761U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- noise removal
- circuit
- noise
- utility
- 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 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図は本考案に係るノイズ除去回路を示す図
、第２図は他の実施例を示す図、第３図は更に他
の実施例を示す図、第４図はフイルタの特性図で
ある。
Ｐはエラーフラグ信号、Ｓはサーチ動作中を示
す信号、Ｍはノイズ除去信号、７はレベル保持回
路。
Fig. 1 is a diagram showing a noise removal circuit according to the present invention, Fig. 2 is a diagram showing another embodiment, Fig. 3 is a diagram showing still another embodiment, and Fig. 4 is a characteristic diagram of the filter. . P is an error flag signal, S is a signal indicating that a search operation is in progress, M is a noise removal signal, and 7 is a level holding circuit.
Claims (1)
ズ除去回路であつて、サーチ動作中であることを
示す信号及び再生デジタル信号にエラーがあるこ
とを示す信号に基いてノイズ除去信号を導出する
構成としたことを特徴とするノイズ除去回路。 (2) ノイズ除去信号を、ミユーテイング信号と
することを特徴とする実用新案登録請求の範囲第
１項記載のノイズ除去回路。 (3) ノイズ除去信号を、ＤＡ変換された後のア
ナログ音声信号線路に挿入されたローパスフイル
タのフイルタ特性を変化させる信号とすることを
特徴とする実用新案登録請求の範囲第１項記載の
ノイズ除去回路。 (4) ノイズ除去信号を、ＤＡ変換された後の信
号線路に挿入されたエラー発生直前の信号レベル
を保持するレベル保持回路を作動させる信号とす
ることを特徴とする実用新案登録請求の範囲第１
項記載のノイズ除去回路。[Claims for Utility Model Registration] (1) A noise removal circuit in a digital audio signal reproducing device, which is based on a signal indicating that a search operation is in progress and a signal indicating that there is an error in the reproduced digital signal. What is claimed is: 1. A noise removal circuit characterized in that the circuit derives a noise removal signal using a noise reduction signal. (2) The noise removal circuit according to claim 1, wherein the noise removal signal is a mutating signal. (3) The noise according to claim 1 of the utility model registration, characterized in that the noise removal signal is a signal that changes the filter characteristics of a low-pass filter inserted into the analog audio signal line after being DA-converted. removal circuit. (4) Utility model registration claim 1, characterized in that the noise removal signal is a signal that operates a level holding circuit that is inserted into the signal line after DA conversion and holds the signal level immediately before the error occurrence. 1
Noise removal circuit described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175951U JPH0181761U (en) | 1987-11-18 | 1987-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987175951U JPH0181761U (en) | 1987-11-18 | 1987-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0181761U true JPH0181761U (en) | 1989-05-31 |
Family
ID=31467724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987175951U Pending JPH0181761U (en) | 1987-11-18 | 1987-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0181761U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8118573B2 (en) | 2004-12-22 | 2012-02-21 | Robert Bosch Gmbh | Piston pump with at least one piston element |
-
1987
- 1987-11-18 JP JP1987175951U patent/JPH0181761U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8118573B2 (en) | 2004-12-22 | 2012-02-21 | Robert Bosch Gmbh | Piston pump with at least one piston element |
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