IT948353B - Perfezionamento nei sistemi per la registrazione e la riproduzione qadrifonica di suoni con l impiego di due sole tracce indipendenti - Google Patents
Perfezionamento nei sistemi per la registrazione e la riproduzione qadrifonica di suoni con l impiego di due sole tracce indipendentiInfo
- Publication number
- IT948353B IT948353B IT47989/72A IT4798972A IT948353B IT 948353 B IT948353 B IT 948353B IT 47989/72 A IT47989/72 A IT 47989/72A IT 4798972 A IT4798972 A IT 4798972A IT 948353 B IT948353 B IT 948353B
- Authority
- IT
- Italy
- Prior art keywords
- sounds
- reproduction
- recording
- improvement
- systems
- 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)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
- Stereo-Broadcasting Methods (AREA)
- Fuel Cell (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11216871A | 1971-02-03 | 1971-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT948353B true IT948353B (it) | 1973-05-30 |
Family
ID=22342450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT47989/72A IT948353B (it) | 1971-02-03 | 1972-01-27 | Perfezionamento nei sistemi per la registrazione e la riproduzione qadrifonica di suoni con l impiego di due sole tracce indipendenti |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3745252A (it) |
| JP (2) | JPS5110961B1 (it) |
| BE (1) | BE778296A (it) |
| CA (1) | CA974887A (it) |
| DE (1) | DE2204098C3 (it) |
| FR (1) | FR2124264A1 (it) |
| GB (2) | GB1385651A (it) |
| IL (1) | IL38277A (it) |
| IT (1) | IT948353B (it) |
| NL (1) | NL7200834A (it) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3911222A (en) * | 1970-12-09 | 1975-10-07 | Kenwood Corp | Method and a device for producing a 4-channel stereophonic sound field |
| US3787622A (en) * | 1971-02-05 | 1974-01-22 | Sansui Electric Co | Quadrasonic sound system for two channel transmission |
| USRE29171E (en) * | 1971-07-02 | 1977-04-05 | Sansui Electric Co., Ltd. | Multi-directional sound system |
| US3906156A (en) | 1971-10-06 | 1975-09-16 | Duane H Cooper | Signal matrixing for directional reproduction of sound |
| JPS4889702A (it) * | 1972-02-25 | 1973-11-22 | ||
| JPS5210364B2 (it) * | 1972-05-02 | 1977-03-23 | ||
| CA997278A (en) * | 1972-05-30 | 1976-09-21 | Keiichiro Ogura | Discrete 4-channel stereo recording and/or reproducing system |
| JPS5332643B2 (it) * | 1972-06-06 | 1978-09-09 | ||
| JPS5246681B2 (it) * | 1972-12-29 | 1977-11-26 | ||
| JPS5248002B2 (it) * | 1973-09-18 | 1977-12-07 | ||
| EP1715538A1 (en) * | 2005-04-19 | 2006-10-25 | Nicholas M. Abson | Novel materials for alkaline fuel cells |
| EP1724861A1 (en) * | 2005-05-17 | 2006-11-22 | Nicholas M. Abson | Novel materials for alkaline electrolysers and alkaline fuel cells |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3632886A (en) * | 1969-12-29 | 1972-01-04 | Peter Scheiber | Quadrasonic sound system |
-
1971
- 1971-02-03 US US00112168A patent/US3745252A/en not_active Expired - Lifetime
- 1971-12-01 IL IL38277A patent/IL38277A/xx unknown
- 1971-12-01 CA CA129,044A patent/CA974887A/en not_active Expired
-
1972
- 1972-01-20 BE BE778296A patent/BE778296A/xx unknown
- 1972-01-20 NL NL7200834A patent/NL7200834A/xx unknown
- 1972-01-25 FR FR7202454A patent/FR2124264A1/fr not_active Withdrawn
- 1972-01-27 IT IT47989/72A patent/IT948353B/it active
- 1972-01-28 DE DE2204098A patent/DE2204098C3/de not_active Expired
- 1972-02-02 GB GB497472A patent/GB1385651A/en not_active Expired
- 1972-02-03 JP JP47011924A patent/JPS5110961B1/ja active Pending
- 1972-07-11 GB GB497472A patent/GB1379846A/en not_active Expired
-
1975
- 1975-05-01 JP JP50052132A patent/JPS5140442B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA974887A (en) | 1975-09-23 |
| DE2204098A1 (de) | 1972-08-17 |
| GB1385651A (en) | 1975-02-26 |
| JPS5110961B1 (it) | 1976-04-08 |
| BE778296A (fr) | 1972-07-20 |
| FR2124264A1 (it) | 1972-09-22 |
| JPS5140442B2 (it) | 1976-11-04 |
| IL38277A0 (en) | 1972-02-29 |
| IL38277A (en) | 1974-05-16 |
| DE2204098B2 (de) | 1978-02-09 |
| NL7200834A (it) | 1972-08-07 |
| US3745252A (en) | 1973-07-10 |
| DE2204098C3 (de) | 1978-09-21 |
| GB1379846A (en) | 1975-01-08 |
| JPS50152701A (it) | 1975-12-09 |
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