FR2406368A1 - FORMAT AND DEVICES FOR SOUND SYSTEM - Google Patents
FORMAT AND DEVICES FOR SOUND SYSTEMInfo
- 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
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.
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)
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)
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)
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 |
-
1978
- 1978-10-10 GB GB7839937A patent/GB2006583B/en not_active Expired
- 1978-10-13 JP JP12521578A patent/JPS5462801A/en active Granted
- 1978-10-13 CA CA313,336A patent/CA1100881A/en not_active Expired
- 1978-10-16 FR FR7829397A patent/FR2406368A1/en active Granted
Patent Citations (1)
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
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |