JPS5514746A - Amplitude adjuster for audio signal - Google Patents
Amplitude adjuster for audio signalInfo
- Publication number
- JPS5514746A JPS5514746A JP8743978A JP8743978A JPS5514746A JP S5514746 A JPS5514746 A JP S5514746A JP 8743978 A JP8743978 A JP 8743978A JP 8743978 A JP8743978 A JP 8743978A JP S5514746 A JPS5514746 A JP S5514746A
- Authority
- JP
- Japan
- Prior art keywords
- output
- signal
- bpf6
- amplitude
- circuit
- 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
Abstract
PURPOSE: To increase the dynamic range as well as to prevent the lowering of the signal quality by carrying out instantaneously both compression and expansion of the amplitude for the audio signals in accordance with the signal level.
CONSTITUTION: The audio signals sent from input terminal of amplitude compressor A are applied to output terminal 2 via amplitude compression circuit 3, and at the same time part of the audio signals is applied to FM modulation circuit 5 to have the FM modulation. The FM-modulated signal is applied to BPF6. And in case the modulated signal features a larger band width of BPF6, the output with AM modulation applied by slope of the filter characteristics is generated at the output of BPF6. This output is detected through detection circuit 7, and the signal of the positive pole area of the output signal is applied as the control voltage of circuit 3. Thus the compression is performed in accordance with the signal level. On the other hand, amplitude expander B has the same operation as compressor 1 via FM modulation circuit 5', BPF6' and detection circuit 7' in order to expand the signal level for expander B.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8743978A JPS5514746A (en) | 1978-07-17 | 1978-07-17 | Amplitude adjuster for audio signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8743978A JPS5514746A (en) | 1978-07-17 | 1978-07-17 | Amplitude adjuster for audio signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5514746A true JPS5514746A (en) | 1980-02-01 |
Family
ID=13914881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8743978A Pending JPS5514746A (en) | 1978-07-17 | 1978-07-17 | Amplitude adjuster for audio signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5514746A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6330149A (en) * | 1986-07-22 | 1988-02-08 | Kubota Ltd | Control method for pipe thickness in continuous casting for pipe |
-
1978
- 1978-07-17 JP JP8743978A patent/JPS5514746A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6330149A (en) * | 1986-07-22 | 1988-02-08 | Kubota Ltd | Control method for pipe thickness in continuous casting for pipe |
JPH0558824B2 (en) * | 1986-07-22 | 1993-08-27 | Kubota Kk |
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