CA1153701A - Audio signal processing system - Google Patents
Audio signal processing systemInfo
- Publication number
- CA1153701A CA1153701A CA000364374A CA364374A CA1153701A CA 1153701 A CA1153701 A CA 1153701A CA 000364374 A CA000364374 A CA 000364374A CA 364374 A CA364374 A CA 364374A CA 1153701 A CA1153701 A CA 1153701A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- audio signal
- gain control
- generating
- audio
- 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
- 230000005236 sound signal Effects 0.000 title claims abstract description 44
- 230000000694 effects Effects 0.000 claims abstract description 20
- 230000004044 response Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims 3
- 239000003990 capacitor Substances 0.000 description 27
- 230000006870 function Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000005923 long-lasting effect Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000002459 sustained effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940035564 duration Drugs 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 230000006403 short-term memory Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Stereophonic System (AREA)
- Control Of Amplification And Gain Control (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US098,972 | 1979-11-30 | ||
| US06/098,972 US4404427A (en) | 1979-11-30 | 1979-11-30 | Audio signal processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1153701A true CA1153701A (en) | 1983-09-13 |
Family
ID=22271785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000364374A Expired CA1153701A (en) | 1979-11-30 | 1980-11-10 | Audio signal processing system |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4404427A (OSRAM) |
| JP (1) | JPS56501666A (OSRAM) |
| AU (2) | AU6577780A (OSRAM) |
| CA (1) | CA1153701A (OSRAM) |
| GB (1) | GB2075316B (OSRAM) |
| IN (1) | IN155297B (OSRAM) |
| WO (1) | WO1981001636A1 (OSRAM) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4706287A (en) * | 1984-10-17 | 1987-11-10 | Kintek, Inc. | Stereo generator |
| US5129004A (en) * | 1984-11-12 | 1992-07-07 | Nissan Motor Company, Limited | Automotive multi-speaker audio system with different timing reproduction of audio sound |
| JPS61244200A (ja) * | 1985-04-20 | 1986-10-30 | Nissan Motor Co Ltd | 音場改善装置 |
| US4685134A (en) * | 1985-07-19 | 1987-08-04 | Rca Corporation | Multichannel computer generated sound synthesis system |
| FR2595529B1 (fr) * | 1986-03-06 | 1990-04-06 | Gandolfi Patrick | Synthetiseur simulateur de stereophonie |
| JPH06332084A (ja) * | 1993-05-25 | 1994-12-02 | Sony Corp | 映画フィルム用ディジタル情報再生装置 |
| US5708719A (en) * | 1995-09-07 | 1998-01-13 | Rep Investment Limited Liability Company | In-home theater surround sound speaker system |
| US6118876A (en) * | 1995-09-07 | 2000-09-12 | Rep Investment Limited Liability Company | Surround sound speaker system for improved spatial effects |
| US5930370A (en) * | 1995-09-07 | 1999-07-27 | Rep Investment Limited Liability | In-home theater surround sound speaker system |
| GB2312799B (en) * | 1996-04-30 | 2000-07-19 | Sgs Thomson Microelectronics | A circuit and method for automatically adjusting the amplitude of broadcast audio signals |
| US6389935B1 (en) * | 1996-09-02 | 2002-05-21 | New Transducers Limited | Acoustic display screen |
| ITTO20110811A1 (it) * | 2011-09-12 | 2013-03-13 | Gabriele Biagiotti | Circuito elettronico di elaborazione di un segnale audio, in particolare per incrementare le variazioni di ampiezza |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3681618A (en) * | 1971-03-29 | 1972-08-01 | David E Blackmer | Rms circuits with bipolar logarithmic converter |
| US3822408A (en) * | 1973-02-20 | 1974-07-02 | Bose Corp | Operational amplifier clamping |
| US3980964A (en) * | 1974-05-20 | 1976-09-14 | Grodinsky Robert M | Noise reduction circuit |
| US3968384A (en) * | 1974-10-21 | 1976-07-06 | Gte Automatic Electric Laboratories Incorporated | Constant percentage clipping circuit |
| US3918003A (en) * | 1974-10-29 | 1975-11-04 | Bell Telephone Labor Inc | Combined feedback and feedforward automatic gain control |
| US4039755A (en) * | 1976-07-26 | 1977-08-02 | Teledyne, Inc. | Auditorium simulator economizes on delay line bandwidth |
| US4166924A (en) * | 1977-05-12 | 1979-09-04 | Bell Telephone Laboratories, Incorporated | Removing reverberative echo components in speech signals |
| US4184047A (en) * | 1977-06-22 | 1980-01-15 | Langford Robert H | Audio signal processing system |
| US4112254A (en) * | 1977-10-17 | 1978-09-05 | Dbx, Inc. | Signal compander system |
| GB2029141A (en) * | 1978-08-26 | 1980-03-12 | Viva Co | Gain control arrangements |
| US4220929A (en) * | 1978-12-26 | 1980-09-02 | Dbx, Inc. | Signal expander |
-
1979
- 1979-11-30 US US06/098,972 patent/US4404427A/en not_active Expired - Lifetime
-
1980
- 1980-10-29 GB GB8121830A patent/GB2075316B/en not_active Expired
- 1980-10-29 AU AU65777/80A patent/AU6577780A/en not_active Abandoned
- 1980-10-29 AU AU6577781A patent/AU6577781A/xx active Pending
- 1980-10-29 WO PCT/US1980/001449 patent/WO1981001636A1/en not_active Ceased
- 1980-10-29 JP JP81500234A patent/JPS56501666A/ja active Pending
- 1980-11-01 IN IN789/DEL/80A patent/IN155297B/en unknown
- 1980-11-10 CA CA000364374A patent/CA1153701A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU6577781A (en) | 1981-06-19 |
| AU6577780A (en) | 1981-06-19 |
| JPS56501666A (OSRAM) | 1981-11-12 |
| IN155297B (OSRAM) | 1985-01-19 |
| WO1981001636A1 (en) | 1981-06-11 |
| GB2075316B (en) | 1984-02-08 |
| GB2075316A (en) | 1981-11-11 |
| US4404427A (en) | 1983-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |