JPS55142404A - Extender for dynamic range - Google Patents
Extender for dynamic rangeInfo
- 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
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
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)
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 |
-
1979
- 1979-04-23 JP JP4894079A patent/JPS55142404A/en active Pending
Cited By (5)
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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