IT958512B - Perfezionamento negli apparecchi per la riproduzione di suoni in quadrifonia - Google Patents
Perfezionamento negli apparecchi per la riproduzione di suoni in quadrifoniaInfo
- Publication number
- IT958512B IT958512B IT51115/72A IT5111572A IT958512B IT 958512 B IT958512 B IT 958512B IT 51115/72 A IT51115/72 A IT 51115/72A IT 5111572 A IT5111572 A IT 5111572A IT 958512 B IT958512 B IT 958512B
- Authority
- IT
- Italy
- Prior art keywords
- sounds
- phones
- reproduction
- improvement
- equipment
- 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 |
---|---|
IT958512B true IT958512B (it) | 1973-10-30 |
Family
ID=22557545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT51115/72A IT958512B (it) | 1971-06-23 | 1972-06-23 | Perfezionamento negli apparecchi per la riproduzione di suoni in quadrifonia |
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 FR FR7222631A patent/FR2143325B1/fr 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
- 1972-06-23 DE DE2230842A patent/DE2230842C3/de not_active Expired
- 1972-06-23 JP JP47063100A patent/JPS5110963B1/ja active Pending
- 1972-06-23 GB GB2958472A patent/GB1396352A/en not_active Expired
- 1972-06-23 IT IT51115/72A patent/IT958512B/it active
Also Published As
Publication number | Publication date |
---|---|
DE2230842B2 (fr) | 1980-02-21 |
FR2143325A1 (fr) | 1973-02-02 |
JPS5110963B1 (fr) | 1976-04-08 |
DE2230842A1 (de) | 1972-12-28 |
AU4377572A (en) | 1974-01-03 |
DE2230842C3 (de) | 1980-10-16 |
AU464001B2 (en) | 1975-08-14 |
BE785279A (fr) | 1972-10-16 |
NL7208607A (fr) | 1972-12-28 |
GB1396352A (en) | 1975-06-04 |
CA973806A (en) | 1975-09-02 |
FR2143325B1 (fr) | 1979-04-06 |
US3798373A (en) | 1974-03-19 |
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