JPS63165937U - - Google Patents

Info

Publication number
JPS63165937U
JPS63165937U JP20022087U JP20022087U JPS63165937U JP S63165937 U JPS63165937 U JP S63165937U JP 20022087 U JP20022087 U JP 20022087U JP 20022087 U JP20022087 U JP 20022087U JP S63165937 U JPS63165937 U JP S63165937U
Authority
JP
Japan
Prior art keywords
signal
filter
output
detector
filters
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
JP20022087U
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 JP20022087U priority Critical patent/JPS63165937U/ja
Publication of JPS63165937U publication Critical patent/JPS63165937U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Arrangements For Transmission Of Measured Signals (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (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ブロツク回路
図、第２図及び第３図はそれぞれアナログ伝送時
及びデジタル伝送時におけるスペクトラムを示す
グラフ、及び第４図はローパスフイルタの周波数
特性を示すグラフである。 １……アナログ音声源、２……デジタルデータ
源、３……切換器、４……伝送路、５……ローパ
スフイルタ、６……検波器、７……平滑器、８…
…判定器、９……判定結果。 Fig. 1 is a block circuit diagram showing an embodiment of the present invention, Figs. 2 and 3 are graphs showing spectra during analog transmission and digital transmission, respectively, and Fig. 4 shows the frequency characteristics of a low-pass filter. It is a graph. DESCRIPTION OF SYMBOLS 1...Analog audio source, 2...Digital data source, 3...Switcher, 4...Transmission line, 5...Low pass filter, 6...Detector, 7...Smoother, 8...
... Judgment device, 9... Judgment result.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] デジタル信号とアナログ信号とを切り換えて伝
送されてくる信号をろ波するフイルタと、該フイ
ルタの出力を検波する検波器と、該検波器の出力
を平滑する平滑器と、該平滑器の出力によつてデ
ジタル信号であるかアナログ信号であるかを判定
する判定器とを備え、デジタル信号とアナログ信
号とでは信号のスペクトラムが相違することを利
用して上記フイルタの出力の有無により上記判定
を行うようにしたことを特徴とする伝送信号自動
判定装置。 A filter that filters the transmitted signal by switching between a digital signal and an analog signal, a detector that detects the output of the filter, a smoother that smoothes the output of the detector, and a filter that filters the transmitted signal. Therefore, it is equipped with a determiner that determines whether the signal is a digital signal or an analog signal, and makes the above determination based on the presence or absence of the output of the filter, taking advantage of the fact that the signal spectra are different between the digital signal and the analog signal. A transmission signal automatic determination device characterized in that:
JP20022087U 1987-12-29 1987-12-29 Pending JPS63165937U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20022087U JPS63165937U (en) 1987-12-29 1987-12-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20022087U JPS63165937U (en) 1987-12-29 1987-12-29

Publications (1)

Publication Number Publication Date
JPS63165937U true JPS63165937U (en) 1988-10-28

Family

ID=31162528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20022087U Pending JPS63165937U (en) 1987-12-29 1987-12-29

Country Status (1)

Country Link
JP (1) JPS63165937U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010175334A (en) * 2009-01-28 2010-08-12 Yokogawa Electric Corp Measuring apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448215A (en) * 1966-08-22 1969-06-03 Northrop Corp Monitoring device for distinguishing between voice and data signals
JPS49135547A (en) * 1973-04-27 1974-12-27
JPS5084103A (en) * 1973-11-27 1975-07-07
JPS5229714A (en) * 1975-09-01 1977-03-05 Hitachi Ltd Tape recorder
JPS55166359A (en) * 1979-06-14 1980-12-25 Kokusai Denshin Denwa Co Ltd <Kdd> Detector for modulated data signal
JPS5864861A (en) * 1981-10-14 1983-04-18 Nec Corp Discriminating method for reception signal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448215A (en) * 1966-08-22 1969-06-03 Northrop Corp Monitoring device for distinguishing between voice and data signals
JPS49135547A (en) * 1973-04-27 1974-12-27
JPS5084103A (en) * 1973-11-27 1975-07-07
JPS5229714A (en) * 1975-09-01 1977-03-05 Hitachi Ltd Tape recorder
JPS55166359A (en) * 1979-06-14 1980-12-25 Kokusai Denshin Denwa Co Ltd <Kdd> Detector for modulated data signal
JPS5864861A (en) * 1981-10-14 1983-04-18 Nec Corp Discriminating method for reception signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010175334A (en) * 2009-01-28 2010-08-12 Yokogawa Electric Corp Measuring apparatus

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