FR2406368A1 - FORMAT AND DEVICES FOR SOUND SYSTEM - Google Patents

FORMAT AND DEVICES FOR SOUND SYSTEM

Info

Publication number
FR2406368A1
FR2406368A1 FR7829397A FR7829397A FR2406368A1 FR 2406368 A1 FR2406368 A1 FR 2406368A1 FR 7829397 A FR7829397 A FR 7829397A FR 7829397 A FR7829397 A FR 7829397A FR 2406368 A1 FR2406368 A1 FR 2406368A1
Authority
FR
France
Prior art keywords
signals
surround
screen
sound system
speakers
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
FR7829397A
Other languages
French (fr)
Other versions
FR2406368B1 (en
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.)
Dolby Laboratories Licensing Corp
Original Assignee
Dolby Laboratories Licensing Corp
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 Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Publication of FR2406368A1 publication Critical patent/FR2406368A1/en
Application granted granted Critical
Publication of FR2406368B1 publication Critical patent/FR2406368B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

L'invention concerne un système sonore. Les informations des canaux sonores pour les haut-parleurs avant situés à gauche, à droite et au centre de l'écran sont appliquées, avec les informations d'ambiance destinées à être reproduites par les haut-parleurs d'ambiance situés au fond de la salle de cinéma, à un codeur matriciel dont les signaux de sortie sont enregistrés sur les deux pistes sonores du film. Pour la lecture, les signaux des deux pistes sont appliqués à un décodeur 12 qui décode ces signaux en des signaux principaux AG, AD appliqués aux haut-parleurs avant et en des signaux ArG, ArD qui sont appliqués, après traitement par un circuit combinateur 16, des filtres passe-bas 18 et passe-haut 20, une ligne à retard 22 et un décodeur de réduction de bruits 24, aux circuits électroniques des haut-parleurs d'ambiance. Application notamment aux films cinématographiques.The invention relates to a sound system. The sound channel information for the front speakers located on the left, right and center of the screen is applied, with the surround information intended to be reproduced by the surround speakers located at the back of the screen. movie theater, to a matrix encoder whose output signals are recorded on the two soundtracks of the film. For playback, the signals of the two tracks are applied to a decoder 12 which decodes these signals into main signals AG, AD applied to the front speakers and into signals ArG, ArD which are applied, after processing by a combiner circuit 16 , low-pass filters 18 and high-pass 20, a delay line 22 and a noise reduction decoder 24, to the electronic circuits of the surround speakers. Application in particular to cinematographic films.

FR7829397A 1977-10-14 1978-10-16 FORMAT AND DEVICES FOR SOUND SYSTEM Granted FR2406368A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84204677A 1977-10-14 1977-10-14

Publications (2)

Publication Number Publication Date
FR2406368A1 true FR2406368A1 (en) 1979-05-11
FR2406368B1 FR2406368B1 (en) 1983-08-12

Family

ID=25286397

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7829397A Granted FR2406368A1 (en) 1977-10-14 1978-10-16 FORMAT AND DEVICES FOR SOUND SYSTEM

Country Status (4)

Country Link
JP (1) JPS5462801A (en)
CA (1) CA1100881A (en)
FR (1) FR2406368A1 (en)
GB (1) GB2006583B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4577305A (en) * 1983-03-14 1986-03-18 Dolby Laboratories Licensing Corporation Stereophonic motion picture photographic sound-tracks compatible with different sound projection formats and record and playback apparatus therefore
JPS62122500A (en) * 1985-11-22 1987-06-03 Sony Corp Multi-channel stereo reproducing device
DK152478C (en) * 1985-12-06 1988-07-25 Ole Sparkjaer PROCEDURE AND CIRCUIT FOR DECODING FOUR CHANNEL SIGNALS WHICH ARE THE MATRIX CODE AND EXISTING IN THE FORM OF A TWO CHANNEL SIGNAL
JPS63183495A (en) * 1987-01-27 1988-07-28 ヤマハ株式会社 Sound field controller
ATE120605T1 (en) * 1988-01-06 1995-04-15 Lucasarts Entertainment Co SPATIAL SOUND REPRODUCTION SYSTEM.
US5043970A (en) * 1988-01-06 1991-08-27 Lucasarts Entertainment Company Sound system with source material and surround timbre response correction, specified front and surround loudspeaker directionality, and multi-loudspeaker surround
US6624873B1 (en) 1998-05-05 2003-09-23 Dolby Laboratories Licensing Corporation Matrix-encoded surround-sound channels in a discrete digital sound format
WO2000004744A1 (en) * 1998-07-17 2000-01-27 Lucasfilm Ltd. Multi-channel audio surround system
AR024353A1 (en) 1999-06-15 2002-10-02 He Chunhong AUDIO AND INTERACTIVE AUXILIARY EQUIPMENT WITH RELATED VOICE TO AUDIO
KR20150139849A (en) 2013-04-05 2015-12-14 톰슨 라이센싱 Method for managing reverberant field for immersive audio

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536682A1 (en) * 1974-08-29 1976-05-20 Dolby Laboratories Inc PROCEDURE AND CIRCUIT ARRANGEMENT FOR STEREOPHONE SOUND REPRODUCTION

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4937601A (en) * 1972-08-07 1974-04-08
GB1510385A (en) * 1974-12-16 1978-05-10 Mosely J Surround sound system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536682A1 (en) * 1974-08-29 1976-05-20 Dolby Laboratories Inc PROCEDURE AND CIRCUIT ARRANGEMENT FOR STEREOPHONE SOUND REPRODUCTION

Also Published As

Publication number Publication date
JPH0343839B2 (en) 1991-07-03
CA1100881A (en) 1981-05-12
GB2006583A (en) 1979-05-02
JPS5462801A (en) 1979-05-21
GB2006583B (en) 1982-04-28
FR2406368B1 (en) 1983-08-12

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Legal Events

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