JPH0322420U - - Google Patents
Info
- Publication number
- JPH0322420U JPH0322420U JP8304089U JP8304089U JPH0322420U JP H0322420 U JPH0322420 U JP H0322420U JP 8304089 U JP8304089 U JP 8304089U JP 8304089 U JP8304089 U JP 8304089U JP H0322420 U JPH0322420 U JP H0322420U
- Authority
- JP
- Japan
- Prior art keywords
- control signal
- pass filter
- low
- detection device
- outputs
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims 1
- 238000009499 grossing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 230000010354 integration Effects 0.000 description 1
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の原理構成を示す図、第２図は
本考案の実施例であるカセツトデツキシステムを
説明する図、第３図は第２図におけるＤＳＰの低
域フイルタ手段等の説明図、第４図はＤＳＰから
抽出する音響信号を説明する図、第５図はＤＳＰ
から抽出された音響信号データの記憶手段を説明
する図、第６図は積分手段の処理を示すフローチ
ヤート、第７図は本考案の別の実施例であるカセ
ツトデツキシステムを説明する図、第８図は従来
のカセツトデツキシステムにレベル検出装置を用
いたミユーテイングを説明する図、第９図は第８
図のカセツトデツキシステムの各部の出力波形を
説明する図、第１０図は第８図の低域フイルタ手
段を説明する図、第１１図は第１０図を低域フイ
ルタ手段を特性を説明する図である。
図において、１……低域フイルタ手段、２０…
…積分手段、１１……比較手段。
FIG. 1 is a diagram showing the principle configuration of the present invention, FIG. 2 is a diagram explaining a cassette deck system which is an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the low-pass filter means etc. of the DSP in FIG. 2. , Fig. 4 is a diagram explaining the acoustic signal extracted from the DSP, Fig. 5 is a diagram explaining the acoustic signal extracted from the DSP.
FIG. 6 is a flowchart showing the processing of the integrating means; FIG. 7 is a diagram explaining a cassette deck system which is another embodiment of the present invention; Figure 8 is a diagram explaining mutating using a level detection device in a conventional cassette deck system, and Figure 9
10 is a diagram explaining the low-pass filter means of FIG. 8, and FIG. 11 is a diagram explaining the characteristics of the low-pass filter means of FIG. 10. It is. In the figure, 1...low-pass filter means, 20...
...Integration means, 11...Comparison means.
Claims (1)
ユーテイング部６を駆動するための制御信号Ｓｃ
を出力するレベル検出装置８において、 絶対値化された音響信号Ｓｉｎを平滑化する低
域フイルタ手段１０と、 該低域フイルタ手段１０からの出力を平均化す
る積分手段２０と、 該積分手段２０の出力を基準値ＶＲと比較し、
該基準値よりも小さい場合に前記制御信号Ｓｃを
出力する比較手段１１とを備えることを特徴とす
るレベル検出装置。[Claims for Utility Model Registration] Control signal Sc for detecting the silent portion of the input acoustic signal Sin and driving the muting section 6
The level detection device 8 that outputs the following: a low-pass filter means 10 for smoothing the absolute value acoustic signal Sin; an integrating means 20 for averaging the output from the low-pass filter means 10; and the integrating means 20. Compare the output of with the reference value VR,
A level detection device comprising: comparison means 11 that outputs the control signal Sc when the control signal Sc is smaller than the reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8304089U JPH0633702Y2 (en) | 1989-07-17 | 1989-07-17 | Level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8304089U JPH0633702Y2 (en) | 1989-07-17 | 1989-07-17 | Level detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0322420U true JPH0322420U (en) | 1991-03-07 |
| JPH0633702Y2 JPH0633702Y2 (en) | 1994-08-31 |
Family
ID=31630377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8304089U Expired - Lifetime JPH0633702Y2 (en) | 1989-07-17 | 1989-07-17 | Level detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633702Y2 (en) |
-
1989
- 1989-07-17 JP JP8304089U patent/JPH0633702Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0633702Y2 (en) | 1994-08-31 |