GB1402474A - Sound reproduction systems - Google Patents
Sound reproduction systemsInfo
- Publication number
- GB1402474A GB1402474A GB5875772A GB5875772A GB1402474A GB 1402474 A GB1402474 A GB 1402474A GB 5875772 A GB5875772 A GB 5875772A GB 5875772 A GB5875772 A GB 5875772A GB 1402474 A GB1402474 A GB 1402474A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- matrix
- converter
- composite
- reproduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011159 matrix material Substances 0.000 abstract 8
- 239000002131 composite material Substances 0.000 abstract 5
- 238000000926 separation method Methods 0.000 abstract 3
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/86—Arrangements characterised by the broadcast information itself
- H04H20/88—Stereophonic broadcast systems
- H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
-
- 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 Analysis (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Stereophonic System (AREA)
- Stereo-Broadcasting Methods (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10397071A JPS5313962B2 (US08066781-20111129-C00013.png) | 1971-12-21 | 1971-12-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1402474A true GB1402474A (en) | 1975-08-06 |
Family
ID=14368190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5875772A Expired GB1402474A (en) | 1971-12-21 | 1972-12-20 | Sound reproduction systems |
Country Status (5)
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1494751A (en) * | 1974-03-26 | 1977-12-14 | Nat Res Dev | Sound reproduction systems |
US3971890A (en) * | 1975-02-10 | 1976-07-27 | Cbs Inc. | Method and apparatus for quadraphonic enhancement of stereophonic signals |
GB1550627A (en) * | 1975-11-13 | 1979-08-15 | Nat Res Dev | Sound reproduction systems |
JPS56102625A (en) * | 1980-01-19 | 1981-08-17 | Matsushita Electric Ind Co Ltd | Cooker |
US5412731A (en) * | 1982-11-08 | 1995-05-02 | Desper Products, Inc. | Automatic stereophonic manipulation system and apparatus for image enhancement |
US4589129A (en) * | 1984-02-21 | 1986-05-13 | Kintek, Inc. | Signal decoding system |
US4612663A (en) * | 1984-03-26 | 1986-09-16 | Holbrook Kyle A | Multichannel audio reproduction system |
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 |
US4819269A (en) * | 1987-07-21 | 1989-04-04 | Hughes Aircraft Company | Extended imaging split mode loudspeaker system |
US4910778A (en) * | 1987-10-16 | 1990-03-20 | Barton Geoffrey J | Signal enhancement processor for stereo system |
US5661808A (en) * | 1995-04-27 | 1997-08-26 | Srs Labs, Inc. | Stereo enhancement system |
US5850453A (en) * | 1995-07-28 | 1998-12-15 | Srs Labs, Inc. | Acoustic correction apparatus |
US6118876A (en) * | 1995-09-07 | 2000-09-12 | Rep Investment Limited Liability Company | Surround sound speaker system for improved spatial effects |
US5708719A (en) * | 1995-09-07 | 1998-01-13 | Rep Investment Limited Liability Company | In-home theater surround sound speaker system |
US5930370A (en) * | 1995-09-07 | 1999-07-27 | Rep Investment Limited Liability | In-home theater surround sound speaker system |
US5970152A (en) * | 1996-04-30 | 1999-10-19 | Srs Labs, Inc. | Audio enhancement system for use in a surround sound environment |
US5912976A (en) * | 1996-11-07 | 1999-06-15 | Srs Labs, Inc. | Multi-channel audio enhancement system for use in recording and playback and methods for providing same |
US6281749B1 (en) | 1997-06-17 | 2001-08-28 | Srs Labs, Inc. | Sound enhancement system |
US7031474B1 (en) | 1999-10-04 | 2006-04-18 | Srs Labs, Inc. | Acoustic correction apparatus |
US7277767B2 (en) | 1999-12-10 | 2007-10-02 | Srs Labs, Inc. | System and method for enhanced streaming audio |
JP2007208679A (ja) * | 2006-02-02 | 2007-08-16 | Matsushita Electric Ind Co Ltd | 音響再生装置 |
US8050434B1 (en) | 2006-12-21 | 2011-11-01 | Srs Labs, Inc. | Multi-channel audio enhancement system |
EP2661907B8 (en) | 2011-01-04 | 2019-08-14 | DTS, Inc. | Immersive audio rendering system |
WO2014190140A1 (en) | 2013-05-23 | 2014-11-27 | Alan Kraemer | Headphone audio enhancement system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3329772A (en) * | 1963-10-28 | 1967-07-04 | John H Farrell | Binaural simulator |
US3170991A (en) * | 1963-11-27 | 1965-02-23 | Glasgal Ralph | System for stereo separation ratio control, elimination of cross-talk and the like |
US3718773A (en) * | 1970-05-18 | 1973-02-27 | Barnard R | Four channel recording and reproducing system |
US3757047A (en) * | 1970-05-21 | 1973-09-04 | Sansui Electric Co | Four channel sound reproduction system |
US3684835A (en) * | 1970-07-29 | 1972-08-15 | Parasound Inc | Four channel stereo synthesizer |
CA942198A (en) * | 1970-09-15 | 1974-02-19 | Kazuho Ohta | Multidimensional stereophonic reproducing system |
NL172815B (nl) * | 1971-04-13 | Sony Corp | Meervoudige geluidweergeefinrichting. | |
US3697692A (en) * | 1971-06-10 | 1972-10-10 | Dynaco Inc | Two-channel,four-component stereophonic system |
US3710023A (en) * | 1971-09-27 | 1973-01-09 | Int Technical Dev Corp | Sound reproducing system for a four speaker stereo utilizing signal expansion and signal delay |
-
1971
- 1971-12-21 JP JP10397071A patent/JPS5313962B2/ja not_active Expired
-
1972
- 1972-12-18 US US315928A patent/US3885101A/en not_active Expired - Lifetime
- 1972-12-20 GB GB5875772A patent/GB1402474A/en not_active Expired
- 1972-12-20 NL NL7217342.A patent/NL163939C/xx not_active IP Right Cessation
- 1972-12-21 DE DE2262761A patent/DE2262761C3/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7217342A (US08066781-20111129-C00013.png) | 1973-06-25 |
JPS4869501A (US08066781-20111129-C00013.png) | 1973-09-21 |
DE2262761A1 (de) | 1973-07-05 |
NL163939C (nl) | 1980-10-15 |
JPS5313962B2 (US08066781-20111129-C00013.png) | 1978-05-13 |
DE2262761B2 (de) | 1980-08-21 |
US3885101A (en) | 1975-05-20 |
DE2262761C3 (de) | 1981-04-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |