NL7209930A - - Google Patents
Info
- Publication number
- NL7209930A NL7209930A NL7209930A NL7209930A NL7209930A NL 7209930 A NL7209930 A NL 7209930A NL 7209930 A NL7209930 A NL 7209930A NL 7209930 A NL7209930 A NL 7209930A NL 7209930 A NL7209930 A NL 7209930A
- Authority
- NL
- Netherlands
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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP46053771A JPS5213082B1 (zh) | 1971-07-19 | 1971-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7209930A true NL7209930A (zh) | 1973-01-23 |
Family
ID=12952066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7209930A NL7209930A (zh) | 1971-07-19 | 1972-07-18 |
Country Status (8)
Country | Link |
---|---|
US (1) | US3786193A (zh) |
JP (1) | JPS5213082B1 (zh) |
CA (2) | CA991086A (zh) |
DE (1) | DE2235238A1 (zh) |
FR (1) | FR2146394B1 (zh) |
GB (1) | GB1400061A (zh) |
IT (1) | IT963000B (zh) |
NL (1) | NL7209930A (zh) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985978A (en) * | 1971-10-06 | 1976-10-12 | Cooper Duane H | Method and apparatus for control of FM beat distortion |
GB1402320A (en) * | 1971-10-25 | 1975-08-06 | Sansui Electric Co | Decoder for use in 4-2-4 matrix playback system |
JPS5210364B2 (zh) * | 1972-05-02 | 1977-03-23 | ||
DE2227705C3 (de) * | 1972-06-07 | 1975-09-11 | Polygram Gmbh, 2000 Hamburg | Verfahren zur Herstellung einer vielkanaligen vorzugsweise vierkanaligen (quadraphonischen) Toninformation |
US3883692A (en) * | 1972-06-16 | 1975-05-13 | Sony Corp | Decoder apparatus with logic circuit for use with a four channel stereo |
GB1447392A (en) * | 1972-08-17 | 1976-08-25 | Nagamura F | Recording apparatus |
JPS5235282B2 (zh) * | 1972-09-09 | 1977-09-08 | ||
DE2252132C3 (de) | 1972-10-24 | 1982-08-26 | Sansui Electric Co., Ltd., Tokyo | Decodierer für ein 4-2-4-Matrixsystem |
DE2253696B1 (de) * | 1972-11-02 | 1974-02-21 | Electroacustic Gmbh, 2300 Kiel | Verfahren zur verringerung von stoerspannungen bei mehrkanaliger wiedergabe von akustischen darbietungen |
GB1450533A (en) * | 1972-11-08 | 1976-09-22 | Ferrograph Co Ltd | Stereo sound reproducing apparatus |
US3890466A (en) * | 1973-02-01 | 1975-06-17 | Cbs Inc | Encoders for quadraphonic sound system |
JPS5317283B2 (zh) * | 1973-03-07 | 1978-06-07 | ||
JPS5248001B2 (zh) * | 1973-08-20 | 1977-12-07 | ||
US3919478A (en) * | 1974-01-17 | 1975-11-11 | Zenith Radio Corp | Passive four-channel decoder |
GB1514162A (en) * | 1974-03-25 | 1978-06-14 | Ruggles W | Directional enhancement system for quadraphonic decoders |
US3875338A (en) * | 1974-04-18 | 1975-04-01 | Columbia Broadcasting Syst Inc | Decoder matrix for quadraphonic sound systems |
US3943287A (en) * | 1974-06-03 | 1976-03-09 | Cbs Inc. | Apparatus and method for decoding four channel sound |
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 |
US5157697A (en) * | 1991-03-21 | 1992-10-20 | Novatel Communications, Ltd. | Receiver employing correlation technique for canceling cross-talk between in-phase and quadrature channels prior to decoding |
US5796844A (en) * | 1996-07-19 | 1998-08-18 | Lexicon | Multichannel active matrix sound reproduction with maximum lateral separation |
US5870480A (en) * | 1996-07-19 | 1999-02-09 | Lexicon | Multichannel active matrix encoder and decoder with maximum lateral separation |
EP2190221B1 (en) * | 2008-11-20 | 2018-09-12 | Harman Becker Automotive Systems GmbH | Audio system |
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
- 1971-07-19 JP JP46053771A patent/JPS5213082B1/ja active Pending
-
1972
- 1972-07-10 GB GB3214372A patent/GB1400061A/en not_active Expired
- 1972-07-17 US US00272439A patent/US3786193A/en not_active Expired - Lifetime
- 1972-07-18 DE DE2235238A patent/DE2235238A1/de not_active Ceased
- 1972-07-18 CA CA147,365A patent/CA991086A/en not_active Expired
- 1972-07-18 NL NL7209930A patent/NL7209930A/xx not_active Application Discontinuation
- 1972-07-19 FR FR7226055A patent/FR2146394B1/fr not_active Expired
- 1972-07-19 IT IT27179/72A patent/IT963000B/it active
-
1976
- 1976-02-20 CA CA246,161A patent/CA1001957A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3786193A (en) | 1974-01-15 |
CA991086A (en) | 1976-06-15 |
FR2146394A1 (zh) | 1973-03-02 |
JPS5213082B1 (zh) | 1977-04-12 |
IT963000B (it) | 1973-12-31 |
DE2235238A1 (de) | 1973-02-01 |
FR2146394B1 (zh) | 1977-04-01 |
GB1400061A (en) | 1975-07-16 |
CA1001957A (en) | 1976-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BC | A request for examination has been filed | ||
A85 | Still pending on 85-01-01 | ||
BV | The patent application has lapsed |