JPS6051607U - VTR audio mixing circuit - Google Patents
VTR audio mixing circuitInfo
- Publication number
- JPS6051607U JPS6051607U JP14441283U JP14441283U JPS6051607U JP S6051607 U JPS6051607 U JP S6051607U JP 14441283 U JP14441283 U JP 14441283U JP 14441283 U JP14441283 U JP 14441283U JP S6051607 U JPS6051607 U JP S6051607U
- Authority
- JP
- Japan
- Prior art keywords
- audio
- audio signal
- circuit
- signal
- vtr
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のＶＴＲの音声混合回路のブロック図、第
２図は本考案の一実施例のＶＴＲの音声混合回路のブロ
ーツク図である。
１・・・固定ヘッド音声、２・・・ハイファイ音声信号
、３・・・ミキシング回路、４′・・・混合音声信号、
５・・・ミューティング回路、６・・・増幅器、７・・
・ＤＣ検波器、８・・・スイッチング回路。FIG. 1 is a block diagram of a conventional VTR audio mixing circuit, and FIG. 2 is a block diagram of a VTR audio mixing circuit according to an embodiment of the present invention. 1...Fixed head audio, 2...High-fidelity audio signal, 3...Mixing circuit, 4'...Mixed audio signal,
5... Muting circuit, 6... Amplifier, 7...
・DC detector, 8... switching circuit.
Claims (1)
録された第１の音声の再生機能と回転ヘッドによりテー
プ上の映像トラックに映像信号と重畳して記録された第
２の音声の再生機能とを備えたＶＴＲ（ビデオ・テープ
・レコーダ）において、前記第１の音声信号が所定レベ
ル以上の際前記第１の音声信号を通過させ又前記第１の
音声信号が所定レベル以下の際前記第１の音声信号をミ
ューティングするミューティング回路と、前記第２の音
声信号と前記ミューティング回路を通過した前記第１の
音声信号とをミキシングして混合音声信号を出力するミ
キシング回路とを備えたＶＴＲの音声混合回路。 ２ 前記ミューティング回路として、前記第１の音声信
号のレベルを検知するＤＣ検波器と、前記ミューティン
グ回路の入力インピーダンスの確保と前記第１の音声信
号の通過を行なう増幅器と、前記ＤＣ検波器の制御信号
に従って前記増幅器の出力を断続するスイッチング回路
とを備えた実用新案登録請求の範囲第１項記載のＶＴＲ
の音声混合回路。[Claims for Utility Model Registration] 1. A first audio reproduction function recorded on a dedicated audio track on a tape by a fixed head, and a second audio reproduction function recorded on a video track on the tape in a superimposed manner with a video signal by a rotating head. In a VTR (video tape recorder) having an audio playback function, the first audio signal is passed when the first audio signal is at a predetermined level or higher, and the first audio signal is at a predetermined level. A muting circuit that mutes the first audio signal in the following cases, and mixing that mixes the second audio signal and the first audio signal that has passed through the muting circuit to output a mixed audio signal. A VTR audio mixing circuit equipped with a circuit. 2 The muting circuit includes a DC detector that detects the level of the first audio signal, an amplifier that ensures input impedance of the muting circuit and passes the first audio signal, and the DC detector A switching circuit for switching the output of the amplifier on and off according to a control signal of the utility model registration claim 1.
audio mixing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14441283U JPS6051607U (en) | 1983-09-16 | 1983-09-16 | VTR audio mixing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14441283U JPS6051607U (en) | 1983-09-16 | 1983-09-16 | VTR audio mixing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6051607U true JPS6051607U (en) | 1985-04-11 |
Family
ID=30322046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14441283U Pending JPS6051607U (en) | 1983-09-16 | 1983-09-16 | VTR audio mixing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051607U (en) |
-
1983
- 1983-09-16 JP JP14441283U patent/JPS6051607U/en active Pending
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