BE785279A - QUADRIPHONE RECORDING AND PLAYBACK SYSTEM - Google Patents
QUADRIPHONE RECORDING AND PLAYBACK SYSTEMInfo
- Publication number
- BE785279A BE785279A BE785279A BE785279A BE785279A BE 785279 A BE785279 A BE 785279A BE 785279 A BE785279 A BE 785279A BE 785279 A BE785279 A BE 785279A BE 785279 A BE785279 A BE 785279A
- Authority
- BE
- Belgium
- Prior art keywords
- quadriphone
- recording
- playback system
- playback
- quadriphone recording
- Prior art date
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)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15597671A | 1971-06-23 | 1971-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE785279A true BE785279A (en) | 1972-10-16 |
Family
ID=22557545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE785279A BE785279A (en) | 1971-06-23 | 1972-06-22 | QUADRIPHONE RECORDING AND PLAYBACK SYSTEM |
Country Status (10)
Country | Link |
---|---|
US (1) | US3798373A (en) |
JP (1) | JPS5110963B1 (en) |
AU (1) | AU464001B2 (en) |
BE (1) | BE785279A (en) |
CA (1) | CA973806A (en) |
DE (1) | DE2230842C3 (en) |
FR (1) | FR2143325B1 (en) |
GB (1) | GB1396352A (en) |
IT (1) | IT958512B (en) |
NL (1) | NL7208607A (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1398786A (en) * | 1971-08-06 | 1975-06-25 | Sony Corp | Multisignal transmission apparatus |
DE2252132C3 (en) | 1972-10-24 | 1982-08-26 | Sansui Electric Co., Ltd., Tokyo | Decoder for a 4-2-4 matrix system |
JPS5527517B2 (en) * | 1972-12-01 | 1980-07-21 | ||
JPS5320343B2 (en) * | 1973-03-29 | 1978-06-26 | ||
GB1514162A (en) * | 1974-03-25 | 1978-06-14 | Ruggles W | Directional enhancement system for quadraphonic decoders |
US3937885A (en) * | 1974-09-06 | 1976-02-10 | Motorola, Inc. | Control circuit for a matrixed four channel audio reproducing system |
JPS5453831U (en) * | 1977-09-22 | 1979-04-13 | ||
JPS54137248U (en) * | 1978-03-17 | 1979-09-22 | ||
US4799260A (en) * | 1985-03-07 | 1989-01-17 | Dolby Laboratories Licensing Corporation | Variable matrix decoder |
US5046098A (en) * | 1985-03-07 | 1991-09-03 | Dolby Laboratories Licensing Corporation | Variable matrix decoder with three output channels |
US4862502A (en) * | 1988-01-06 | 1989-08-29 | Lexicon, Inc. | Sound reproduction |
US5136650A (en) * | 1991-01-09 | 1992-08-04 | Lexicon, Inc. | Sound reproduction |
US5870480A (en) * | 1996-07-19 | 1999-02-09 | Lexicon | Multichannel active matrix encoder and decoder with maximum lateral separation |
US5796844A (en) * | 1996-07-19 | 1998-08-18 | Lexicon | Multichannel active matrix sound reproduction with maximum lateral separation |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3632886A (en) * | 1969-12-29 | 1972-01-04 | Peter Scheiber | Quadrasonic sound system |
US3646574A (en) * | 1970-05-25 | 1972-02-29 | Howard S Holzer | Compatible stereo generator |
US3684835A (en) * | 1970-07-29 | 1972-08-15 | Parasound Inc | Four channel stereo synthesizer |
-
1971
- 1971-06-23 US US00155976A patent/US3798373A/en not_active Expired - Lifetime
-
1972
- 1972-06-13 CA CA144,532A patent/CA973806A/en not_active Expired
- 1972-06-22 FR FR7222631A patent/FR2143325B1/fr not_active Expired
- 1972-06-22 BE BE785279A patent/BE785279A/en unknown
- 1972-06-22 NL NL7208607A patent/NL7208607A/xx not_active Application Discontinuation
- 1972-06-22 AU AU43775/72A patent/AU464001B2/en not_active Expired
- 1972-06-23 IT IT51115/72A patent/IT958512B/en active
- 1972-06-23 GB GB2958472A patent/GB1396352A/en not_active Expired
- 1972-06-23 JP JP47063100A patent/JPS5110963B1/ja active Pending
- 1972-06-23 DE DE2230842A patent/DE2230842C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7208607A (en) | 1972-12-28 |
AU4377572A (en) | 1974-01-03 |
DE2230842A1 (en) | 1972-12-28 |
CA973806A (en) | 1975-09-02 |
IT958512B (en) | 1973-10-30 |
AU464001B2 (en) | 1975-08-14 |
JPS5110963B1 (en) | 1976-04-08 |
DE2230842C3 (en) | 1980-10-16 |
US3798373A (en) | 1974-03-19 |
FR2143325A1 (en) | 1973-02-02 |
FR2143325B1 (en) | 1979-04-06 |
DE2230842B2 (en) | 1980-02-21 |
GB1396352A (en) | 1975-06-04 |
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