CA974887A - Matrixes and decoders for quadruphonic records - Google Patents

Matrixes and decoders for quadruphonic records

Info

Publication number: CA974887A
Authority: CA; Canada
Prior art keywords: quadruphonic; matrixes; decoders; records; quadruphonic records
Prior art date: 1971-02-03
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

Application number

CA129,044A

Other versions

CA129044S (en

Inventor

Benjamin B. Bauer

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

CBS Broadcasting Inc

Original Assignee

CBS Inc

Priority date (The priority date 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 date listed.)

1971-02-03

Filing date

1971-12-01

Publication date

1975-09-23

1971-12-01 Application filed by CBS Inc filed Critical CBS Inc

1973-05-31 Priority to CA172,795A priority Critical patent/CA961774A/en

1975-09-23 Application granted granted Critical

1975-09-23 Publication of CA974887A publication Critical patent/CA974887A/en

Status Expired legal-status Critical Current

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)

CA129,044A 1971-02-03 1971-12-01 Matrixes and decoders for quadruphonic records Expired CA974887A (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
CA172,795A CA961774A (en)	1971-02-03	1973-05-31	Matrixes and decoders for quadraphonic records

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US11216871A	1971-02-03	1971-02-03

Publications (1)

Publication Number	Publication Date
CA974887A true CA974887A (en)	1975-09-23

Family

ID=22342450

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA129,044A Expired CA974887A (en)	1971-02-03	1971-12-01	Matrixes and decoders for quadruphonic records

Country Status (10)

Country	Link
US (1)	US3745252A (en)
JP (2)	JPS5110961B1 (en)
BE (1)	BE778296A (en)
CA (1)	CA974887A (en)
DE (1)	DE2204098C3 (en)
FR (1)	FR2124264A1 (en)
GB (2)	GB1385651A (en)
IL (1)	IL38277A (en)
IT (1)	IT948353B (en)
NL (1)	NL7200834A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
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 (en) *	1972-02-25	1973-11-22
JPS5210364B2 (en) *	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 (en) *	1972-06-06	1978-09-09
JPS5246681B2 (en) *	1972-12-29	1977-11-26
JPS5248002B2 (en) *	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)

* Cited by examiner, † Cited by third party
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/en unknown
- 1971-12-01 CA CA129,044A patent/CA974887A/en not_active Expired
1972
- 1972-01-20 BE BE778296A patent/BE778296A/en 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/en active
- 1972-01-28 DE DE2204098A patent/DE2204098C3/en 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
IL38277A (en)	1974-05-16
BE778296A (en)	1972-07-20
DE2204098C3 (en)	1978-09-21
FR2124264A1 (en)	1972-09-22
IL38277A0 (en)	1972-02-29
DE2204098B2 (en)	1978-02-09
US3745252A (en)	1973-07-10
JPS5140442B2 (en)	1976-11-04
DE2204098A1 (en)	1972-08-17
IT948353B (en)	1973-05-30
JPS5110961B1 (en)	1976-04-08
GB1379846A (en)	1975-01-08
NL7200834A (en)	1972-08-07
JPS50152701A (en)	1975-12-09
GB1385651A (en)	1975-02-26

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