CA988432A - Compressors, expanders and noise reduction systems - Google Patents
Compressors, expanders and noise reduction systemsInfo
- Publication number
- CA988432A CA988432A CA169,366A CA169366A CA988432A CA 988432 A CA988432 A CA 988432A CA 169366 A CA169366 A CA 169366A CA 988432 A CA988432 A CA 988432A
- Authority
- CA
- Canada
- Prior art keywords
- expanders
- compressors
- noise reduction
- reduction systems
- systems
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/0405—Non-linear filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
- H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/04—Frequency selective two-port networks
- H03H11/12—Frequency selective two-port networks using amplifiers with feedback
- H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2040672A GB1432763A (en) | 1972-05-02 | 1972-05-02 | Compressors expanders and noise reduction systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA988432A true CA988432A (en) | 1976-05-04 |
Family
ID=10145451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA169,366A Expired CA988432A (en) | 1972-05-02 | 1973-04-24 | Compressors, expanders and noise reduction systems |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3828280A (es) |
| JP (1) | JPS57685B2 (es) |
| AT (1) | AT358099B (es) |
| CA (1) | CA988432A (es) |
| CH (1) | CH559473A5 (es) |
| DE (1) | DE2321686C2 (es) |
| FR (1) | FR2183155B1 (es) |
| GB (1) | GB1432763A (es) |
| IT (1) | IT1030662B (es) |
| NL (1) | NL186989C (es) |
| SE (3) | SE404862B (es) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1000617A (en) * | 1973-05-17 | 1976-11-30 | Ray M. Dolby | Compressors, expanders and noise reduction systems |
| JPS519805A (ja) * | 1974-07-15 | 1976-01-26 | Sanyo Electric Co | Zatsuonteigenkairo |
| US4155041A (en) | 1976-05-13 | 1979-05-15 | Burns Richard C | System for reducing noise transients |
| JPS5918723Y2 (ja) * | 1976-10-26 | 1984-05-30 | 株式会社東芝 | 雑音低減装置における信号レベル表示装置 |
| US4142211A (en) * | 1977-11-23 | 1979-02-27 | Microtime, Inc. | Bidimensional noise reduction system for television |
| FR2435156A1 (fr) * | 1978-08-31 | 1980-03-28 | Izakson Ilya | Filtre adaptatif |
| JPS55156431A (en) * | 1979-05-24 | 1980-12-05 | Sony Corp | Noise reduction system |
| SE422369B (sv) * | 1979-08-03 | 1982-03-01 | Arvid Lundbeck | Anordning for kompensering av overforingsfunktion |
| JPS56106433A (en) * | 1980-01-28 | 1981-08-24 | Sony Corp | Noise reducing circuit |
| JPS56157112A (en) * | 1980-05-08 | 1981-12-04 | Pioneer Electronic Corp | Compressing and expanding circuit for signal |
| BE889428A (fr) * | 1980-06-30 | 1981-10-16 | Dolby Ray Milton | Dispositif destine a modifier la plage dynamique de signaux d'entree |
| DK168806B1 (da) * | 1980-06-30 | 1994-06-13 | Ray Milton Dolby | Kredsløbsarrangement til modifikation af dynamikområde |
| GB2111356B (en) * | 1981-12-01 | 1985-03-20 | Ray Milton Dolby | Improvements in circuit arrangements for modifying dynamic range |
| CA1188384A (en) * | 1981-12-29 | 1985-06-04 | Masayuki Katakura | Noise reduction circuit |
| JPH0320796Y2 (es) * | 1985-07-18 | 1991-05-07 | ||
| US4737735A (en) * | 1986-07-25 | 1988-04-12 | Kampes Donald P | Phantom powered amplifier |
| US4944024A (en) * | 1989-02-02 | 1990-07-24 | Amaf Industries, Inc. | Method and apparatus for reducing noise in a linked compressor-expander telecommunications system |
| US5278912A (en) * | 1991-06-28 | 1994-01-11 | Resound Corporation | Multiband programmable compression system |
| CN102017402B (zh) | 2007-12-21 | 2015-01-07 | Dts有限责任公司 | 用于调节音频信号的感知响度的系统 |
| US8538042B2 (en) | 2009-08-11 | 2013-09-17 | Dts Llc | System for increasing perceived loudness of speakers |
| US9312829B2 (en) | 2012-04-12 | 2016-04-12 | Dts Llc | System for adjusting loudness of audio signals in real time |
| US10983073B2 (en) | 2016-07-16 | 2021-04-20 | Rigaku Corporation | Hybrid inspection system |
| US11990380B2 (en) * | 2019-04-19 | 2024-05-21 | Kla Corporation | Methods and systems for combining x-ray metrology data sets to improve parameter estimation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2193966A (en) * | 1936-08-05 | 1940-03-19 | Jones Cyril Edward Palmer | Volume range controlling arrangement employing thermionic amplifiers |
| GB1253031A (es) * | 1968-01-10 | 1971-11-10 | ||
| US3631365A (en) * | 1968-11-01 | 1971-12-28 | Dolby Laboratories Inc | Signal compressors and expanders |
| BE753495A (fr) * | 1969-07-21 | 1970-12-16 | Dolby Laboratories Inc | Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. ( |
| US3729693A (en) * | 1971-08-02 | 1973-04-24 | R Dolby | Compressor/expander switching methods and apparatus |
-
1972
- 1972-05-02 GB GB2040672A patent/GB1432763A/en not_active Expired
-
1973
- 1973-04-24 CA CA169,366A patent/CA988432A/en not_active Expired
- 1973-04-26 SE SE7305908A patent/SE404862B/xx unknown
- 1973-04-28 DE DE2321686A patent/DE2321686C2/de not_active Expired
- 1973-05-01 US US00356126A patent/US3828280A/en not_active Expired - Lifetime
- 1973-05-02 NL NLAANVRAGE7306131,A patent/NL186989C/xx not_active IP Right Cessation
- 1973-05-02 FR FR7315712A patent/FR2183155B1/fr not_active Expired
- 1973-05-02 AT AT385973A patent/AT358099B/de not_active IP Right Cessation
- 1973-05-02 CH CH625973A patent/CH559473A5/xx not_active IP Right Cessation
- 1973-05-02 JP JP4861573A patent/JPS57685B2/ja not_active Expired
- 1973-05-07 IT IT23767/73A patent/IT1030662B/it active
-
1976
- 1976-02-25 SE SE7602316A patent/SE409069B/xx not_active IP Right Cessation
- 1976-02-25 SE SE7602315A patent/SE414102B/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2321686C2 (de) | 1982-12-30 |
| SE7602316L (sv) | 1976-02-25 |
| JPS57685B2 (es) | 1982-01-07 |
| GB1432763A (en) | 1976-04-22 |
| SE7602315L (sv) | 1976-02-25 |
| SE409069B (sv) | 1979-07-23 |
| JPS4956562A (es) | 1974-06-01 |
| FR2183155A1 (es) | 1973-12-14 |
| DE2321686A1 (de) | 1973-11-08 |
| AT358099B (de) | 1980-08-25 |
| SE414102B (sv) | 1980-07-07 |
| SE404862B (sv) | 1978-10-30 |
| IT1030662B (it) | 1979-04-10 |
| FR2183155B1 (es) | 1977-09-02 |
| CH559473A5 (es) | 1975-02-28 |
| NL7306131A (es) | 1973-11-06 |
| NL186989C (nl) | 1991-04-16 |
| NL186989B (nl) | 1990-11-16 |
| ATA385973A (de) | 1980-01-15 |
| US3828280A (en) | 1974-08-06 |
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