JPS633520B2 - - Google Patents
Info
- Publication number
- JPS633520B2 JPS633520B2 JP54005666A JP566679A JPS633520B2 JP S633520 B2 JPS633520 B2 JP S633520B2 JP 54005666 A JP54005666 A JP 54005666A JP 566679 A JP566679 A JP 566679A JP S633520 B2 JPS633520 B2 JP S633520B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- noise reduction
- voltage
- reduction 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 230000001808 coupling effect Effects 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 230000005669 field effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000035807 sensation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
- H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
- H04B1/1669—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal
- H04B1/1676—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal of the sum or difference signal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
- Stereophonic System (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7800871,A NL186732C (nl) | 1978-01-25 | 1978-01-25 | Ruisreduktieschakeling voor stereosignalen. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54110802A JPS54110802A (en) | 1979-08-30 |
| JPS633520B2 true JPS633520B2 (en]) | 1988-01-25 |
Family
ID=19830224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP566679A Granted JPS54110802A (en) | 1978-01-25 | 1979-01-23 | Stereophonic signal noise reducing circuit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4221928A (en]) |
| JP (1) | JPS54110802A (en]) |
| DE (1) | DE2902398A1 (en]) |
| FR (1) | FR2415924A1 (en]) |
| GB (1) | GB2013455B (en]) |
| NL (1) | NL186732C (en]) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57121345A (en) * | 1981-01-20 | 1982-07-28 | Sanyo Electric Co Ltd | Pulse noise eliminating circuit |
| US4457012A (en) * | 1982-06-03 | 1984-06-26 | Carver R W | FM Stereo apparatus and method |
| US4574389A (en) * | 1983-07-15 | 1986-03-04 | Larry Schotz | Stereophonic receiver having a noise reduction control circuit |
| JPS6149532A (ja) * | 1984-08-17 | 1986-03-11 | Pioneer Electronic Corp | セパレ−シヨンコントロ−ル回路 |
| US4696044A (en) * | 1986-09-29 | 1987-09-22 | Waller Jr James K | Dynamic noise reduction with logarithmic control |
| DE19542738A1 (de) * | 1995-11-16 | 1997-05-22 | Bayerische Motoren Werke Ag | Schaltanordnung für mobile Rundfunkempfänger |
| JP3483695B2 (ja) * | 1996-03-14 | 2004-01-06 | 株式会社リコー | 音声通信装置 |
| EP1284542A1 (en) * | 2001-08-12 | 2003-02-19 | Semiconductor Ideas to The Market BV | Stereodecoder |
| US7738664B2 (en) * | 2003-10-07 | 2010-06-15 | Kddi Corporation | Apparatus for fault detection for parallelly transmitted audio signals and apparatus for delay difference detection and adjustment for parallelly transmitted audio signals |
| ATE526614T1 (de) * | 2007-03-19 | 2011-10-15 | Siemens Ag | Einrichtung und verfahren zur automatischen erkennung und unterscheidung von an eine zweikanalige sicherheitskombination angeschlossenen ein- oder zweikanaligen elektronischen sensoren |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1208541A (fr) * | 1957-06-19 | 1960-02-24 | Emi Ltd | Perfectionnements aux dispositifs de transmission du son stéréophonique |
| US3264414A (en) * | 1963-05-28 | 1966-08-02 | Rca Corp | Stereophonic fm receivers |
| US3539729A (en) * | 1967-06-12 | 1970-11-10 | Scott Inc H H | Apparatus for reducing interference in the transmission of electric signals |
| US3823268A (en) * | 1972-06-07 | 1974-07-09 | Mc Intosh Labor Inc | Dynamic stereo separation control |
| GB1450533A (en) * | 1972-11-08 | 1976-09-22 | Ferrograph Co Ltd | Stereo sound reproducing apparatus |
| US3825697A (en) * | 1973-07-27 | 1974-07-23 | Gen Motors Corp | Phase-lock-loop fm-stereo decoder including stereophonic/monophonic blend system for reducing audio distortion |
| DE2338482B2 (de) * | 1973-07-28 | 1975-05-22 | Koerting Radio Werke Gmbh, 8211 Grassau | Schaltungsanordnung zur Rauschreduzierung einer nach dem FCC-System ausgestrahlten Stereosendung auf der Empfängerseite, kombiniert mit einer Mono-Stereo-Anzeige |
| CH559482A5 (en]) * | 1973-12-27 | 1975-02-28 | Rediffusion Ag | |
| DE2410430C2 (de) * | 1974-03-05 | 1985-10-10 | Telefunken electronic GmbH, 7100 Heilbronn | Schaltungsanordnung zur Erzielung einer rauscharmen Stereowiedergabe |
| US4037057A (en) * | 1974-08-01 | 1977-07-19 | Nippon Gakki Seizo Kabushiki Kaisha | Noise-cancelling apparatus for FM stereo receiver |
| US4029906A (en) * | 1975-04-18 | 1977-06-14 | Sansui Electric Co., Ltd. | Automatic noise reduction system of FM stereo receiver |
-
1978
- 1978-01-25 NL NLAANVRAGE7800871,A patent/NL186732C/xx not_active IP Right Cessation
- 1978-12-22 US US05/972,587 patent/US4221928A/en not_active Expired - Lifetime
-
1979
- 1979-01-22 GB GB7902165A patent/GB2013455B/en not_active Expired
- 1979-01-23 DE DE19792902398 patent/DE2902398A1/de active Granted
- 1979-01-23 JP JP566679A patent/JPS54110802A/ja active Granted
- 1979-01-24 FR FR7901786A patent/FR2415924A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| GB2013455B (en) | 1982-05-19 |
| NL186732B (nl) | 1990-09-03 |
| FR2415924B1 (en]) | 1984-04-20 |
| DE2902398C2 (en]) | 1987-10-15 |
| NL186732C (nl) | 1991-02-01 |
| US4221928A (en) | 1980-09-09 |
| FR2415924A1 (fr) | 1979-08-24 |
| NL7800871A (nl) | 1979-07-27 |
| DE2902398A1 (de) | 1979-07-26 |
| JPS54110802A (en) | 1979-08-30 |
| GB2013455A (en) | 1979-08-08 |
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