FR2400287A1 - Reducteur de bruit pour signaux stereophoniques - Google Patents

Reducteur de bruit pour signaux stereophoniques

Info

Publication number
FR2400287A1
FR2400287A1 FR7724495A FR7724495A FR2400287A1 FR 2400287 A1 FR2400287 A1 FR 2400287A1 FR 7724495 A FR7724495 A FR 7724495A FR 7724495 A FR7724495 A FR 7724495A FR 2400287 A1 FR2400287 A1 FR 2400287A1
Authority
FR
France
Prior art keywords
signals
channels
processing
stereophonic
noise reduction
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
FR7724495A
Other languages
English (en)
Other versions
FR2400287B1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7724495A priority Critical patent/FR2400287A1/fr
Priority to US05/930,365 priority patent/US4208547A/en
Publication of FR2400287A1 publication Critical patent/FR2400287A1/fr
Application granted granted Critical
Publication of FR2400287B1 publication Critical patent/FR2400287B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Stereophonic System (AREA)
  • Noise Elimination (AREA)

Abstract

Dispositifs de réduction de bruit pour signaux stéréophoniques à plusieurs canaux. Ces dispositifs sont caractérisés en ce qu'ils comportent des voies de traitement de caractéristiques différentes pour les signaux principaux et les signaux composites, ainsi que des moyens pour rétablir, malgré les traitements différents effectués, la correspondance de phase entre les voies de traitement. Les signaux composites de faible amplitude peuvent être éliminés au cours de leur traitement et être remplacés par des signaux à faible composante de bruit pour reproduire l'effet directionnel. Applications principales à la réduction de bruit en réception stéréophonique en modulation de fréquence ou à la reproduction d'enregistrements quadriphoniques à quatre canaux discrets.
FR7724495A 1977-08-09 1977-08-09 Reducteur de bruit pour signaux stereophoniques Granted FR2400287A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7724495A FR2400287A1 (fr) 1977-08-09 1977-08-09 Reducteur de bruit pour signaux stereophoniques
US05/930,365 US4208547A (en) 1977-08-09 1978-08-02 Method and apparatus for reducing noise in stereophonic signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7724495A FR2400287A1 (fr) 1977-08-09 1977-08-09 Reducteur de bruit pour signaux stereophoniques

Publications (2)

Publication Number Publication Date
FR2400287A1 true FR2400287A1 (fr) 1979-03-09
FR2400287B1 FR2400287B1 (fr) 1982-12-10

Family

ID=9194398

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724495A Granted FR2400287A1 (fr) 1977-08-09 1977-08-09 Reducteur de bruit pour signaux stereophoniques

Country Status (2)

Country Link
US (1) US4208547A (fr)
FR (1) FR2400287A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097982A2 (fr) * 1982-06-03 1984-01-11 CARVER, Robert Weir Appareil FM stéreo
EP0629054A2 (fr) * 1993-06-08 1994-12-14 Matsushita Electric Industrial Co., Ltd. Appareil de suppression de bruit capable d'empêcher la détérioration des caractéristiques du signal en haute fréquence après la suppression de bruit et dans des systèmes de transmission de signaux symétriques

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843941B2 (ja) * 1980-01-28 1983-09-30 パイオニア株式会社 Ａｍステレオ受信機
US4451927A (en) * 1982-03-24 1984-05-29 Harris Corporation Separation correction method and apparatus for plural channel transmission system
JPS621441U (fr) * 1985-06-20 1987-01-07
US5253299A (en) * 1989-02-03 1993-10-12 Pioneer Electronic Corporation Noise reduction apparatus in an FM stereo tuner
US5067157A (en) * 1989-02-03 1991-11-19 Pioneer Electronic Corporation Noise reduction apparatus in an FM stereo tuner
US5068896A (en) * 1989-09-11 1991-11-26 Bose Corporation Audible noise reducing
JPH0628836Y2 (ja) * 1990-06-29 1994-08-03 パイオニア株式会社 Ｆｍステレオ受信機
US6347146B1 (en) * 1991-08-13 2002-02-12 Bose Corporation Noise reducing
JP2000332710A (ja) * 1999-05-24 2000-11-30 Sanyo Electric Co Ltd ステレオ放送用受信装置
DE19942889A1 (de) * 1999-09-08 2001-03-15 Volkswagen Ag Verfahren zur Reduktion von Empfangsstörungen, insbesondere von Mehrwegempfangsstörungen, beim Empfang eines Rundfunksignals sowie eine Schaltungsanordnung zur Durchführung des Verfahrens
DE10116358A1 (de) * 2001-04-02 2002-11-07 Micronas Gmbh Vorrichtung und Verfahren zur Erfassung und Unterdrückung von Störungen
US20030087618A1 (en) * 2001-11-08 2003-05-08 Junsong Li Digital FM stereo decoder and method of operation
AU2002307896A1 (en) * 2002-04-25 2003-11-10 Nokia Corporation Method and device for reducing high frequency error components of a multi-channel modulator
EP2477418B1 (fr) * 2011-01-12 2014-06-04 Nxp B.V. Procédé de traitement des signaux

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372238A (en) * 1966-10-10 1968-03-05 Dominion Electrohome Ind Ltd Stereophonic decoders for f.m. receivers
US3752934A (en) * 1969-12-19 1973-08-14 N Shoichi Stereo demodulating circuit triggered by a minimum input signal level
JPS49134302A (fr) * 1973-04-25 1974-12-24
US3883700A (en) * 1973-12-26 1975-05-13 Cbs Inc System for reproducing four channel signals recorded on a disc record
JPS513501A (en) * 1974-06-27 1976-01-13 Sansui Electric Co 4 channerusutereohosojushinkiniokeru sutereoshingofukuchoki
JPS5113208U (fr) * 1974-07-17 1976-01-30
US4087641A (en) * 1976-04-01 1978-05-02 Pioneer Electronic Corporation Noise limiting circuit for FM stereo receiver
US4063039A (en) * 1976-06-16 1977-12-13 General Motors Corporation Stereo noise reduction circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097982A2 (fr) * 1982-06-03 1984-01-11 CARVER, Robert Weir Appareil FM stéreo
EP0097982A3 (fr) * 1982-06-03 1985-12-27 CARVER, Robert Weir Appareil FM stéreo
EP0629054A2 (fr) * 1993-06-08 1994-12-14 Matsushita Electric Industrial Co., Ltd. Appareil de suppression de bruit capable d'empêcher la détérioration des caractéristiques du signal en haute fréquence après la suppression de bruit et dans des systèmes de transmission de signaux symétriques
EP0629054A3 (fr) * 1993-06-08 1997-01-29 Matsushita Electric Ind Co Ltd Appareil de suppression de bruit capable d'empêcher la détérioration des caractéristiques du signal en haute fréquence après la suppression de bruit et dans des systèmes de transmission de signaux symétriques.
AU694395B2 (en) * 1993-06-08 1998-07-16 Matsushita Electric Industrial Co., Ltd. Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting
US5982901A (en) * 1993-06-08 1999-11-09 Matsushita Electric Industrial Co., Ltd. Noise suppressing apparatus capable of preventing deterioration in high frequency signal characteristic after noise suppression and in balanced signal transmitting system

Also Published As

Publication number Publication date
FR2400287B1 (fr) 1982-12-10
US4208547A (en) 1980-06-17

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Legal Events

Date Code Title Description
ST Notification of lapse
RC Opposition against decision of lapse
DA Annulment of decision of lapse
ER Errata listed in the french official journal (bopi)
ST Notification of lapse