FR2183976A1 - - Google Patents
Info
- Publication number
- FR2183976A1 FR2183976A1 FR7316631A FR7316631A FR2183976A1 FR 2183976 A1 FR2183976 A1 FR 2183976A1 FR 7316631 A FR7316631 A FR 7316631A FR 7316631 A FR7316631 A FR 7316631A FR 2183976 A1 FR2183976 A1 FR 2183976A1
- Authority
- FR
- France
- 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
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/88—Stereophonic broadcast systems
- H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Mathematical Analysis (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Stereophonic System (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/251,836 US4316058A (en) | 1972-05-09 | 1972-05-09 | Sound field transmission system surrounding a listener |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2183976A1 true FR2183976A1 (fr) | 1973-12-21 |
FR2183976B1 FR2183976B1 (fr) | 1977-12-30 |
Family
ID=22953617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7316631A Expired FR2183976B1 (fr) | 1972-05-09 | 1973-05-09 |
Country Status (15)
Country | Link |
---|---|
US (1) | US4316058A (fr) |
JP (1) | JPS4956504A (fr) |
AT (1) | AT348270B (fr) |
BR (1) | BR7303333D0 (fr) |
CA (1) | CA984301A (fr) |
CH (1) | CH595726A5 (fr) |
DD (1) | DD104674A5 (fr) |
DE (1) | DE2317123A1 (fr) |
DK (1) | DK143629C (fr) |
ES (1) | ES414569A1 (fr) |
FR (1) | FR2183976B1 (fr) |
GB (1) | GB1439174A (fr) |
IT (1) | IT984180B (fr) |
NL (1) | NL7306406A (fr) |
SE (1) | SE385426B (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4464745A (en) * | 1981-11-27 | 1984-08-07 | Sanders Associates, Inc. | High dynamic range multiplexing system |
CA1236607A (fr) * | 1985-09-23 | 1988-05-10 | Northern Telecom Limited | Microphone |
US4748669A (en) * | 1986-03-27 | 1988-05-31 | Hughes Aircraft Company | Stereo enhancement system |
US5625696A (en) * | 1990-06-08 | 1997-04-29 | Harman International Industries, Inc. | Six-axis surround sound processor with improved matrix and cancellation control |
FR2682249B1 (fr) * | 1991-10-08 | 1993-12-03 | Thomson Csf | Procede de demodulation numerique d'un signal composite. |
US5802181A (en) * | 1994-03-07 | 1998-09-01 | Sony Corporation | Theater sound system with upper surround channels |
US5661808A (en) | 1995-04-27 | 1997-08-26 | Srs Labs, Inc. | Stereo enhancement system |
US7031474B1 (en) | 1999-10-04 | 2006-04-18 | Srs Labs, Inc. | Acoustic correction apparatus |
US7277767B2 (en) * | 1999-12-10 | 2007-10-02 | Srs Labs, Inc. | System and method for enhanced streaming audio |
WO2014190140A1 (fr) | 2013-05-23 | 2014-11-27 | Alan Kraemer | Système d'amélioration audio d'écouteur |
DE102021203639A1 (de) * | 2021-04-13 | 2022-10-13 | Kaetel Systems Gmbh | Lautsprechersystem, Verfahren zum Herstellen des Lautsprechersystems, Beschallungsanlage für einen Vorführbereich und Vorführbereich |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2136450A5 (fr) * | 1971-04-15 | 1972-12-22 | Matsushita Electric Ind Co Ltd |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3257511A (en) * | 1960-04-18 | 1966-06-21 | Zenith Radio Corp | Stereo em transmission system |
US3375329A (en) * | 1967-05-02 | 1968-03-26 | Francis E Ryan | Monaxial quadraphonic recording system |
US3708623A (en) * | 1970-04-29 | 1973-01-02 | Quadracast Syst Inc | Compatible four channel fm system |
US3679832A (en) * | 1971-03-23 | 1972-07-25 | Bell Telephone Labor Inc | Three-channel fm stereo transmission |
DE2327834C3 (de) * | 1973-06-01 | 1979-09-13 | Kloeckner-Humboldt-Deutz Ag, 5000 Koeln | Vorrichtung zum Trennen von Mischungen wenigstens teilweise schmelzflüssiger Metalle, Metallverbindungen und/oder metallhaltiger Schlacke in mindestens zwei Phasen unterschiedlicher Dichte |
-
1972
- 1972-05-09 US US05/251,836 patent/US4316058A/en not_active Expired - Lifetime
-
1973
- 1973-04-05 DE DE2317123A patent/DE2317123A1/de not_active Withdrawn
- 1973-04-24 CA CA169,400A patent/CA984301A/en not_active Expired
- 1973-04-30 IT IT23575/73A patent/IT984180B/it active
- 1973-05-07 SE SE7306374A patent/SE385426B/xx unknown
- 1973-05-07 CH CH646373A patent/CH595726A5/xx not_active IP Right Cessation
- 1973-05-07 DD DD170652A patent/DD104674A5/xx unknown
- 1973-05-08 JP JP48051040A patent/JPS4956504A/ja active Pending
- 1973-05-08 BR BR3333/73A patent/BR7303333D0/pt unknown
- 1973-05-08 GB GB2174873A patent/GB1439174A/en not_active Expired
- 1973-05-08 NL NL7306406A patent/NL7306406A/xx not_active Application Discontinuation
- 1973-05-08 DK DK253373A patent/DK143629C/da active
- 1973-05-09 FR FR7316631A patent/FR2183976B1/fr not_active Expired
- 1973-05-09 AT AT410373A patent/AT348270B/de not_active IP Right Cessation
- 1973-05-09 ES ES414569A patent/ES414569A1/es not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2136450A5 (fr) * | 1971-04-15 | 1972-12-22 | Matsushita Electric Ind Co Ltd |
Non-Patent Citations (3)
Title |
---|
Revue DE FUNKSCHAU, vol. 44, No. 4, février 1972, pages 117 - 118, article 'Verfahren zur Ubertragung von drei oder vier Nf-Signalen über UKW-Sender' de MALLON * |
Revue US JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 18, no. 2, avril 1970 , page 198, article: 'Time-Division Multiplex for Four-Channel FM de COOPER * |
Revue US JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 20, décembre 1972, no. 10, pages 816-822, article 'Compatible FM Broadcasting of Panoramic Sound' de Gibson et al * |
Also Published As
Publication number | Publication date |
---|---|
NL7306406A (fr) | 1973-11-13 |
GB1439174A (en) | 1976-06-09 |
DE2317123A1 (de) | 1973-11-22 |
ATA410373A (de) | 1978-06-15 |
US4316058A (en) | 1982-02-16 |
IT984180B (it) | 1974-11-20 |
DK143629B (da) | 1981-09-14 |
BR7303333D0 (pt) | 1974-07-11 |
CA984301A (en) | 1976-02-24 |
CH595726A5 (fr) | 1978-02-28 |
DD104674A5 (fr) | 1974-03-12 |
AT348270B (de) | 1979-02-12 |
FR2183976B1 (fr) | 1977-12-30 |
ES414569A1 (es) | 1976-02-01 |
DK143629C (da) | 1982-02-08 |
AU5511573A (en) | 1974-11-07 |
JPS4956504A (fr) | 1974-06-01 |
SE385426B (sv) | 1976-06-28 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |