JPS562748A - Reference level varying system of compander - Google Patents
Reference level varying system of companderInfo
- Publication number
- JPS562748A JPS562748A JP7893479A JP7893479A JPS562748A JP S562748 A JPS562748 A JP S562748A JP 7893479 A JP7893479 A JP 7893479A JP 7893479 A JP7893479 A JP 7893479A JP S562748 A JPS562748 A JP S562748A
- Authority
- JP
- Japan
- Prior art keywords
- deltarf
- reference level
- expander
- compander
- compressor
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
Landscapes
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE:To make it possible to change easily a reference level, by adding an attenuator and an amplifier in the succeeding stage of the compressor and in the preceding stage of the expander respectively in respect to the compander of arbitrary compression ratio and expansion ratio. CONSTITUTION:When lowering from reference level Rf is denoted as DELTARf and DELTARf' and the compression ratio is denoted as n, attenuator 6 of attenuation quantity DELTARf(n-1)/n is added to the output side of compressor 1 of the expander. Meanwhile, an amplifier of amplification quantity DELTARf'(n-1)/n is added to the input side of expander 2. As a result, reference level Rf can be lowered by DELTARf and DELTARf' for compressor 1 and expander 2 respectively independently, so that the reference level can be changed easily.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7893479A JPS5938775B2 (en) | 1979-06-22 | 1979-06-22 | Compander reference level variable method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7893479A JPS5938775B2 (en) | 1979-06-22 | 1979-06-22 | Compander reference level variable method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS562748A true JPS562748A (en) | 1981-01-13 |
JPS5938775B2 JPS5938775B2 (en) | 1984-09-19 |
Family
ID=13675690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7893479A Expired JPS5938775B2 (en) | 1979-06-22 | 1979-06-22 | Compander reference level variable method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5938775B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63167873U (en) * | 1987-04-22 | 1988-11-01 | ||
JPH055887Y2 (en) * | 1987-09-08 | 1993-02-16 |
-
1979
- 1979-06-22 JP JP7893479A patent/JPS5938775B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5938775B2 (en) | 1984-09-19 |
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