AU464001B2 - Apparatus for reproducing quadraphonic sound - Google Patents
Apparatus for reproducing quadraphonic soundInfo
- Publication number
- AU464001B2 AU464001B2 AU43775/72A AU4377572A AU464001B2 AU 464001 B2 AU464001 B2 AU 464001B2 AU 43775/72 A AU43775/72 A AU 43775/72A AU 4377572 A AU4377572 A AU 4377572A AU 464001 B2 AU464001 B2 AU 464001B2
- Authority
- AU
- Australia
- Prior art keywords
- reproducing
- quadraphonic sound
- quadraphonic
- sound
- reproducing quadraphonic
- 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.)
- Expired
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 (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15597671A | 1971-06-23 | 1971-06-23 | |
USUS155976 | 1971-06-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
AU4377572A AU4377572A (en) | 1974-01-03 |
AU464001B2 true AU464001B2 (en) | 1975-08-14 |
Family
ID=22557545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU43775/72A Expired AU464001B2 (en) | 1971-06-23 | 1972-06-22 | Apparatus for reproducing quadraphonic sound |
Country Status (10)
Country | Link |
---|---|
US (1) | US3798373A (fr) |
JP (1) | JPS5110963B1 (fr) |
AU (1) | AU464001B2 (fr) |
BE (1) | BE785279A (fr) |
CA (1) | CA973806A (fr) |
DE (1) | DE2230842C3 (fr) |
FR (1) | FR2143325B1 (fr) |
GB (1) | GB1396352A (fr) |
IT (1) | IT958512B (fr) |
NL (1) | NL7208607A (fr) |
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 (de) | 1972-10-24 | 1982-08-26 | Sansui Electric Co., Ltd., Tokyo | Decodierer für ein 4-2-4-Matrixsystem |
JPS5527517B2 (fr) * | 1972-12-01 | 1980-07-21 | ||
JPS5320343B2 (fr) * | 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 (fr) * | 1977-09-22 | 1979-04-13 | ||
JPS54137248U (fr) * | 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 BE BE785279A patent/BE785279A/fr 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
- 1972-06-22 FR FR7222631A patent/FR2143325B1/fr not_active Expired
- 1972-06-23 DE DE2230842A patent/DE2230842C3/de not_active Expired
- 1972-06-23 IT IT51115/72A patent/IT958512B/it active
- 1972-06-23 GB GB2958472A patent/GB1396352A/en not_active Expired
- 1972-06-23 JP JP47063100A patent/JPS5110963B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS5110963B1 (fr) | 1976-04-08 |
BE785279A (fr) | 1972-10-16 |
GB1396352A (en) | 1975-06-04 |
DE2230842B2 (fr) | 1980-02-21 |
CA973806A (en) | 1975-09-02 |
FR2143325A1 (fr) | 1973-02-02 |
IT958512B (it) | 1973-10-30 |
NL7208607A (fr) | 1972-12-28 |
US3798373A (en) | 1974-03-19 |
DE2230842A1 (de) | 1972-12-28 |
AU4377572A (en) | 1974-01-03 |
FR2143325B1 (fr) | 1979-04-06 |
DE2230842C3 (de) | 1980-10-16 |
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