NL7115538A - - Google Patents
Info
- Publication number
- NL7115538A NL7115538A NL7115538A NL7115538A NL7115538A NL 7115538 A NL7115538 A NL 7115538A NL 7115538 A NL7115538 A NL 7115538A NL 7115538 A NL7115538 A NL 7115538A NL 7115538 A NL7115538 A NL 7115538A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Mathematical Physics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- General Physics & Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Algebra (AREA)
- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11827171A | 1971-02-24 | 1971-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7115538A true NL7115538A (it) | 1972-08-28 |
Family
ID=22377557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7115538A NL7115538A (it) | 1971-02-24 | 1971-11-11 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3784744A (it) |
| JP (1) | JPS5240561B1 (it) |
| AU (1) | AU460098B2 (it) |
| BE (1) | BE777215A (it) |
| CA (1) | CA981589A (it) |
| DE (1) | DE2208099C3 (it) |
| FR (1) | FR2126176B1 (it) |
| GB (2) | GB1379771A (it) |
| IL (1) | IL38130A (it) |
| IT (1) | IT948394B (it) |
| NL (1) | NL7115538A (it) |
Families Citing this family (5)
| 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 |
| US3883692A (en) * | 1972-06-16 | 1975-05-13 | Sony Corp | Decoder apparatus with logic circuit for use with a four channel stereo |
| JPS5645358B2 (it) * | 1973-11-29 | 1981-10-26 | ||
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3632886A (en) * | 1969-12-29 | 1972-01-04 | Peter Scheiber | Quadrasonic sound system |
| US3708631A (en) * | 1970-06-08 | 1973-01-02 | Columbia Broadcasting Syst Inc | Quadraphonic reproducing system with gain control |
-
1971
- 1971-02-24 US US00118271A patent/US3784744A/en not_active Expired - Lifetime
- 1971-11-08 CA CA127,101A patent/CA981589A/en not_active Expired
- 1971-11-11 NL NL7115538A patent/NL7115538A/xx not_active Application Discontinuation
- 1971-11-11 IL IL38130A patent/IL38130A/xx unknown
- 1971-12-20 AU AU37107/71A patent/AU460098B2/en not_active Expired
- 1971-12-23 BE BE777215A patent/BE777215A/xx unknown
- 1971-12-23 FR FR7146313A patent/FR2126176B1/fr not_active Expired
-
1972
- 1972-01-17 JP JP47006291A patent/JPS5240561B1/ja active Pending
- 1972-02-01 IT IT48082/72A patent/IT948394B/it active
- 1972-02-11 GB GB658172A patent/GB1379771A/en not_active Expired
- 1972-02-11 GB GB658072A patent/GB1387873A/en not_active Expired
- 1972-02-21 DE DE722208099A patent/DE2208099C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2126176B1 (it) | 1976-04-30 |
| DE2208099C3 (de) | 1979-03-01 |
| CA981589A (en) | 1976-01-13 |
| GB1387873A (en) | 1975-03-19 |
| FR2126176A1 (it) | 1972-10-06 |
| AU460098B2 (en) | 1975-04-17 |
| AU3710771A (en) | 1973-06-28 |
| DE2208099B2 (de) | 1978-07-06 |
| US3784744A (en) | 1974-01-08 |
| GB1379771A (en) | 1975-01-08 |
| BE777215A (fr) | 1972-06-23 |
| IT948394B (it) | 1973-05-30 |
| IL38130A (en) | 1974-09-10 |
| IL38130A0 (en) | 1972-01-27 |
| DE2208099A1 (de) | 1972-09-07 |
| JPS5240561B1 (it) | 1977-10-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |