JPH01146639U - - Google Patents

Info

Publication number
JPH01146639U
JPH01146639U JP4129588U JP4129588U JPH01146639U JP H01146639 U JPH01146639 U JP H01146639U JP 4129588 U JP4129588 U JP 4129588U JP 4129588 U JP4129588 U JP 4129588U JP H01146639 U JPH01146639 U JP H01146639U
Authority
JP
Japan
Prior art keywords
sap
signal
circuit
audio
discriminating
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
Application number
JP4129588U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP4129588U priority Critical patent/JPH01146639U/ja
Publication of JPH01146639U publication Critical patent/JPH01146639U/ja
Pending legal-status Critical Current

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  • Television Receiver Circuits (AREA)
  • Circuits Of Receivers In General (AREA)
  • Stereo-Broadcasting Methods (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す図である。第
２図は米国の音声多重方式を説明するための図で
あ。 ２０……ＦＭ復調器、３２……ＳＡＰ復調回路
、２８……ＳＡＰ判別回路、４４……誤動作防止
回路。 FIG. 1 is a diagram showing an embodiment of the present invention. FIG. 2 is a diagram for explaining the American audio multiplexing system. 20...FM demodulator, 32...SAP demodulation circuit, 28...SAP discrimination circuit, 44...malfunction prevention circuit.

Claims (1)

【実用新案登録請求の範囲】 音声中間周波数信号をＦＭ復調してテレビ音声
多重信号を出力するＦＭ復調器２０と、 前記テレビ音声多重信号中よりＦＭ変調型式の
副音声チヤンネル信号（ＳＡＰ信号）を復調する
ＳＡＰ復調回路３２と、 前記ＳＡＰ信号のキヤリア成分を検出してＳＡ
Ｐ受信時を判別するＳＡＰ判別回路２８とを備え
るＳＡＰ受信モード判別回路に於いて、 前記音声中間周波数信号の信号レベルを検出し
低レベル時に前記ＳＡＰ判別回路２８を無効化す
る誤動作防止回路４４を、備えることを特徴とす
るＳＡＰ受信モード判別回路。[Claims for Utility Model Registration] An FM demodulator 20 for FM demodulating an audio intermediate frequency signal and outputting a TV audio multiplexed signal, and an FM modulated sub audio channel signal (SAP signal) from the TV audio multiplexed signal. An SAP demodulation circuit 32 that demodulates the SAP signal, and a carrier component of the SAP signal that is detected and SA
The SAP reception mode discriminating circuit includes an SAP discriminating circuit 28 for discriminating when P is received, and a malfunction prevention circuit 44 for detecting the signal level of the audio intermediate frequency signal and disabling the SAP discriminating circuit 28 when the level is low. , an SAP reception mode determination circuit.
JP4129588U 1988-03-29 1988-03-29 Pending JPH01146639U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4129588U JPH01146639U (en) 1988-03-29 1988-03-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4129588U JPH01146639U (en) 1988-03-29 1988-03-29

Publications (1)

Publication Number Publication Date
JPH01146639U true JPH01146639U (en) 1989-10-09

Family

ID=31267736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4129588U Pending JPH01146639U (en) 1988-03-29 1988-03-29

Country Status (1)

Country Link
JP (1) JPH01146639U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10502499A (en) * 1994-04-06 1998-03-03 マクロヴィジョン コーポレイション Method and apparatus for digital audio information broadcasting comprising data compression, encryption and speech synthesis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10502499A (en) * 1994-04-06 1998-03-03 マクロヴィジョン コーポレイション Method and apparatus for digital audio information broadcasting comprising data compression, encryption and speech synthesis

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