CH580376A5 - - Google Patents
Info
- Publication number
- CH580376A5 CH580376A5 CH142772A CH142772A CH580376A5 CH 580376 A5 CH580376 A5 CH 580376A5 CH 142772 A CH142772 A CH 142772A CH 142772 A CH142772 A CH 142772A CH 580376 A5 CH580376 A5 CH 580376A5
- Authority
- CH
- Switzerland
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)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB369871A GB1369813A (en) | 1971-02-02 | 1971-02-02 | Reproduction of sound |
| GB5200871 | 1971-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH580376A5 true CH580376A5 (de) | 1976-09-30 |
Family
ID=26238524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH142772A CH580376A5 (de) | 1971-02-02 | 1972-02-01 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4251685A (de) |
| JP (1) | JPS558880B1 (de) |
| CA (1) | CA977687A (de) |
| CH (1) | CH580376A5 (de) |
| DE (1) | DE2204668C2 (de) |
| FR (1) | FR2125002A5 (de) |
| GB (1) | GB1369813A (de) |
| IT (1) | IT948919B (de) |
| NL (1) | NL174317C (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3906156A (en) | 1971-10-06 | 1975-09-16 | Duane H Cooper | Signal matrixing for directional reproduction of sound |
| GB1494751A (en) * | 1974-03-26 | 1977-12-14 | Nat Res Dev | Sound reproduction systems |
| GB1512514A (en) * | 1974-07-12 | 1978-06-01 | Nat Res Dev | Microphone assemblies |
| GB1550627A (en) * | 1975-11-13 | 1979-08-15 | Nat Res Dev | Sound reproduction systems |
| US4095049A (en) * | 1976-03-15 | 1978-06-13 | National Research Development Corporation | Non-rotationally-symmetric surround-sound encoding system |
| GB2073556B (en) * | 1980-02-23 | 1984-02-22 | Nat Res Dev | Sound reproduction systems |
| GB8402682D0 (en) * | 1984-02-01 | 1984-03-07 | Audim Sa | Stereophonic sound system |
| US4815132A (en) * | 1985-08-30 | 1989-03-21 | Kabushiki Kaisha Toshiba | Stereophonic voice signal transmission system |
| US5043970A (en) * | 1988-01-06 | 1991-08-27 | Lucasarts Entertainment Company | Sound system with source material and surround timbre response correction, specified front and surround loudspeaker directionality, and multi-loudspeaker surround |
| US5222059A (en) * | 1988-01-06 | 1993-06-22 | Lucasfilm Ltd. | Surround-sound system with motion picture soundtrack timbre correction, surround sound channel timbre correction, defined loudspeaker directionality, and reduced comb-filter effects |
| US7382888B2 (en) * | 2000-12-12 | 2008-06-03 | Bose Corporation | Phase shifting audio signal combining |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3069505A (en) * | 1961-07-12 | 1962-12-18 | Philco Corp | Multiplex stereophonic transmitting and receiving system |
| US3813494A (en) * | 1970-06-08 | 1974-05-28 | Columbia Broadcasting Syst Inc | Quadraphonic reproducing system |
| US3856992A (en) * | 1971-10-06 | 1974-12-24 | D Cooper | Multidirectional sound reproduction |
-
1971
- 1971-02-02 GB GB369871A patent/GB1369813A/en not_active Expired
-
1972
- 1972-01-24 IT IT67200/72A patent/IT948919B/it active
- 1972-01-26 NL NLAANVRAGE7201072,A patent/NL174317C/xx not_active IP Right Cessation
- 1972-02-01 CH CH142772A patent/CH580376A5/xx not_active IP Right Cessation
- 1972-02-01 DE DE2204668A patent/DE2204668C2/de not_active Expired
- 1972-02-01 CA CA133,650A patent/CA977687A/en not_active Expired
- 1972-02-01 FR FR7203304A patent/FR2125002A5/fr not_active Expired
- 1972-02-02 JP JP1214172A patent/JPS558880B1/ja active Pending
-
1974
- 1974-01-03 US US05/430,519 patent/US4251685A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2125002A5 (de) | 1972-09-22 |
| DE2204668C2 (de) | 1984-03-01 |
| NL174317B (nl) | 1983-12-16 |
| NL7201072A (de) | 1972-08-04 |
| NL174317C (nl) | 1984-05-16 |
| CA977687A (en) | 1975-11-11 |
| IT948919B (it) | 1973-06-11 |
| DE2204668A1 (de) | 1972-08-10 |
| US4251685A (en) | 1981-02-17 |
| JPS558880B1 (de) | 1980-03-06 |
| GB1369813A (en) | 1974-10-09 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |