JPS55142404A - Extender for dynamic range - Google Patents

Extender for dynamic range

Info

Publication number
JPS55142404A
JPS55142404A JP4894079A JP4894079A JPS55142404A JP S55142404 A JPS55142404 A JP S55142404A JP 4894079 A JP4894079 A JP 4894079A JP 4894079 A JP4894079 A JP 4894079A JP S55142404 A JPS55142404 A JP S55142404A
Authority
JP
Japan
Prior art keywords
signal
fed
switch
level
transmission system
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
JP4894079A
Other languages
Japanese (ja)
Inventor
Shigeki Washisawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Columbia Co Ltd
Original Assignee
Nippon Columbia Co Ltd
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 by Nippon Columbia Co Ltd filed Critical Nippon Columbia Co Ltd
Priority to JP4894079A priority Critical patent/JPS55142404A/en
Publication of JPS55142404A publication Critical patent/JPS55142404A/en
Pending legal-status Critical Current

Links

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE: To enable to extend the dynamic range even with the transmission system deficient in quality, by forming a plurality of signals different in level from the input signal and selecting this corresponding to the transmission system.
CONSTITUTION: The audio signal at the input terminal 3 is branched, one signal is fed to the transmission system 1 through the amplifier 5, and the signal 13 obtained from the output via the attenuator 6 is fed to the automatic change-over switch 7. Another signal is attenuated with the attenuator 9 and fed to the tansmission system 2, and the signal 14 obtained from the amplification of the output to the same level as the signal 13 with the amplifier 10 is fed to the switch 7. Further, the signal 14 is fed to the switching signal generator 12 to obtain the control signal 15, which is fed to the switch 7. The switch 7 selects the signal 13 when the signal level is lower to the switching level preset and selects the signal 14 when higher. The generator 12 produces the signal 15 according to the change of the level of the signal 14 to change-over the switch 7.
COPYRIGHT: (C)1980,JPO&Japio
JP4894079A 1979-04-23 1979-04-23 Extender for dynamic range Pending JPS55142404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4894079A JPS55142404A (en) 1979-04-23 1979-04-23 Extender for dynamic range

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4894079A JPS55142404A (en) 1979-04-23 1979-04-23 Extender for dynamic range

Publications (1)

Publication Number Publication Date
JPS55142404A true JPS55142404A (en) 1980-11-07

Family

ID=12817263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4894079A Pending JPS55142404A (en) 1979-04-23 1979-04-23 Extender for dynamic range

Country Status (1)

Country Link
JP (1) JPS55142404A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62276911A (en) * 1985-06-17 1987-12-01 レ−・ミルトン・ドルビ Circuit and method for varying dynamic range by variable combination technology
JPS6481401A (en) * 1987-09-22 1989-03-27 Canon Kk Signal processor
JPS6481402A (en) * 1987-09-22 1989-03-27 Canon Kk Signal processor
US5128627A (en) * 1990-06-28 1992-07-07 Siemens Aktiengesellschaft Pulse power amplifier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62276911A (en) * 1985-06-17 1987-12-01 レ−・ミルトン・ドルビ Circuit and method for varying dynamic range by variable combination technology
JP2649911B2 (en) * 1985-06-17 1997-09-03 レ−・ミルトン・ドルビ Combination dynamic range modification circuit and method
JPS6481401A (en) * 1987-09-22 1989-03-27 Canon Kk Signal processor
JPS6481402A (en) * 1987-09-22 1989-03-27 Canon Kk Signal processor
US5128627A (en) * 1990-06-28 1992-07-07 Siemens Aktiengesellschaft Pulse power amplifier

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