FR2415924A1 - Circuit reducteur de bruit pour signaux stereo - Google Patents

Circuit reducteur de bruit pour signaux stereo

Info

Publication number
FR2415924A1
FR2415924A1 FR7901786A FR7901786A FR2415924A1 FR 2415924 A1 FR2415924 A1 FR 2415924A1 FR 7901786 A FR7901786 A FR 7901786A FR 7901786 A FR7901786 A FR 7901786A FR 2415924 A1 FR2415924 A1 FR 2415924A1
Authority
FR
France
Prior art keywords
noise reduction
reduction circuit
stereophonic
stereo signals
signals
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
Application number
FR7901786A
Other languages
English (en)
Other versions
FR2415924B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2415924A1 publication Critical patent/FR2415924A1/fr
Application granted granted Critical
Publication of FR2415924B1 publication Critical patent/FR2415924B1/fr
Granted legal-status Critical Current

Links

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)

Abstract

Circuit réducteur de bruit pour signaux stéréophoniques comportant une borne d'entrée de réglage, une première et une seconde sortie ainsi qu'un circuit de couplage réglable pour un couplage réciproque réglable des signaux entre les deux sorties, ces deux sorties n'étant découplées l'une de l'autre que pendant les passages sonores au cours desquels en effet de persistance efficace d'une impression stéréophonique est produite pour obtenir une combinaison optimale du niveau de bruit et de l'effet stéréophonique. Application : stéréophonie.
FR7901786A 1978-01-25 1979-01-24 Circuit reducteur de bruit pour signaux stereo Granted FR2415924A1 (fr)

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
FR2415924A1 true FR2415924A1 (fr) 1979-08-24
FR2415924B1 FR2415924B1 (fr) 1984-04-20

Family

ID=19830224

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7901786A Granted FR2415924A1 (fr) 1978-01-25 1979-01-24 Circuit reducteur de bruit pour signaux stereo

Country Status (6)

Country Link
US (1) US4221928A (fr)
JP (1) JPS54110802A (fr)
DE (1) DE2902398A1 (fr)
FR (1) FR2415924A1 (fr)
GB (1) GB2013455B (fr)
NL (1) NL186732C (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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 (fr) * 2001-08-12 2003-02-19 Semiconductor Ideas to The Market BV Decodeur stereo
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

Citations (6)

* Cited by examiner, † Cited by third party
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
US3539729A (en) * 1967-06-12 1970-11-10 Scott Inc H H Apparatus for reducing interference in the transmission of electric signals
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
DE2338482A1 (de) * 1973-07-28 1975-02-13 Koerting Radio Werke Gmbh Schaltungsanordnung zur rauschreduzierung einer nach dem fcc-system ausgestrahlten stereosendung auf der empfaengerseite, kombiniert mit einer mono-stereo-anzeige
CH559482A5 (fr) * 1973-12-27 1975-02-28 Rediffusion Ag
US3943293A (en) * 1972-11-08 1976-03-09 Ferrograph Company Limited Stereo sound reproducing apparatus with noise reduction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264414A (en) * 1963-05-28 1966-08-02 Rca Corp Stereophonic fm receivers
US3823268A (en) * 1972-06-07 1974-07-09 Mc Intosh Labor Inc Dynamic stereo separation control
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
US3539729A (en) * 1967-06-12 1970-11-10 Scott Inc H H Apparatus for reducing interference in the transmission of electric signals
US3943293A (en) * 1972-11-08 1976-03-09 Ferrograph Company Limited Stereo sound reproducing apparatus with noise reduction
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
DE2338482A1 (de) * 1973-07-28 1975-02-13 Koerting Radio Werke Gmbh Schaltungsanordnung zur rauschreduzierung einer nach dem fcc-system ausgestrahlten stereosendung auf der empfaengerseite, kombiniert mit einer mono-stereo-anzeige
CH559482A5 (fr) * 1973-12-27 1975-02-28 Rediffusion Ag

Also Published As

Publication number Publication date
FR2415924B1 (fr) 1984-04-20
JPS633520B2 (fr) 1988-01-25
DE2902398C2 (fr) 1987-10-15
US4221928A (en) 1980-09-09
NL186732B (nl) 1990-09-03
DE2902398A1 (de) 1979-07-26
JPS54110802A (en) 1979-08-30
NL186732C (nl) 1991-02-01
GB2013455B (en) 1982-05-19
GB2013455A (en) 1979-08-08
NL7800871A (nl) 1979-07-27

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Legal Events

Date Code Title Description
ST Notification of lapse