CA973806A - Apparatus for reproducing quadraphonic sound - Google Patents

Apparatus for reproducing quadraphonic sound

Info

Publication number: CA973806A
Authority: CA; Canada
Prior art keywords: reproducing; quadraphonic sound; quadraphonic; sound; reproducing quadraphonic
Prior art date: 1971-06-23
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

CA144,532A

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.)

1971-06-23

Filing date

1972-06-13

Publication date

1975-09-02

1972-06-13 Application filed by CBS Inc filed Critical CBS Inc

1974-12-12 Priority to CA215,813A priority Critical patent/CA975685A/en

1975-09-02 Application granted granted Critical

1975-09-02 Publication of CA973806A publication Critical patent/CA973806A/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)
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)

CA144,532A 1971-06-23 1972-06-13 Apparatus for reproducing quadraphonic sound Expired CA973806A (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
CA215,813A CA975685A (en)	1971-06-23	1974-12-12	Apparatus for reproducing quadraphonic sound

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US15597671A	1971-06-23	1971-06-23

Publications (1)

Publication Number	Publication Date
CA973806A true CA973806A (en)	1975-09-02

Family

ID=22557545

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA144,532A Expired CA973806A (en)	1971-06-23	1972-06-13	Apparatus for reproducing quadraphonic sound

Country Status (10)

Country	Link
US (1)	US3798373A (en)
JP (1)	JPS5110963B1 (en)
AU (1)	AU464001B2 (en)
BE (1)	BE785279A (en)
CA (1)	CA973806A (en)
DE (1)	DE2230842C3 (en)
FR (1)	FR2143325B1 (en)
GB (1)	GB1396352A (en)
IT (1)	IT958512B (en)
NL (1)	NL7208607A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1398786A (en) *	1971-08-06	1975-06-25	Sony Corp	Multisignal transmission apparatus
DE2252132C3 (en)	1972-10-24	1982-08-26	Sansui Electric Co., Ltd., Tokyo	Decoder for a 4-2-4 matrix system
JPS5527517B2 (en) *	1972-12-01	1980-07-21
JPS5320343B2 (en) *	1973-03-29	1978-06-26
GB1514162A (en) *	1974-03-25	1978-06-14	Ruggles W	Directional enhancement system for quadraphonic decoders
US3937885A (en) *	1974-09-06	1976-02-10	Motorola, Inc.	Control circuit for a matrixed four channel audio reproducing system
JPS5453831U (en) *	1977-09-22	1979-04-13
JPS54137248U (en) *	1978-03-17	1979-09-22
US5046098A (en) *	1985-03-07	1991-09-03	Dolby Laboratories Licensing Corporation	Variable matrix decoder with three output channels
US4799260A (en) *	1985-03-07	1989-01-17	Dolby Laboratories Licensing Corporation	Variable matrix decoder
US4862502A (en) *	1988-01-06	1989-08-29	Lexicon, Inc.	Sound reproduction
US5136650A (en) *	1991-01-09	1992-08-04	Lexicon, Inc.	Sound reproduction
US5870480A (en) *	1996-07-19	1999-02-09	Lexicon	Multichannel active matrix encoder and decoder with maximum lateral separation
US5796844A (en) *	1996-07-19	1998-08-18	Lexicon	Multichannel active matrix sound reproduction with maximum lateral separation

Family Cites Families (3)

* 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
US3646574A (en) *	1970-05-25	1972-02-29	Howard S Holzer	Compatible stereo generator
US3684835A (en) *	1970-07-29	1972-08-15	Parasound Inc	Four channel stereo synthesizer

1971
- 1971-06-23 US US00155976A patent/US3798373A/en not_active Expired - Lifetime
1972
- 1972-06-13 CA CA144,532A patent/CA973806A/en not_active Expired
- 1972-06-22 BE BE785279A patent/BE785279A/en unknown
- 1972-06-22 FR FR7222631A patent/FR2143325B1/fr not_active Expired
- 1972-06-22 NL NL7208607A patent/NL7208607A/xx not_active Application Discontinuation
- 1972-06-22 AU AU43775/72A patent/AU464001B2/en not_active Expired
- 1972-06-23 DE DE2230842A patent/DE2230842C3/en not_active Expired
- 1972-06-23 GB GB2958472A patent/GB1396352A/en not_active Expired
- 1972-06-23 IT IT51115/72A patent/IT958512B/en active
- 1972-06-23 JP JP47063100A patent/JPS5110963B1/ja active Pending

Also Published As

Publication number	Publication date
AU4377572A (en)	1974-01-03
JPS5110963B1 (en)	1976-04-08
AU464001B2 (en)	1975-08-14
FR2143325B1 (en)	1979-04-06
BE785279A (en)	1972-10-16
FR2143325A1 (en)	1973-02-02
IT958512B (en)	1973-10-30
DE2230842A1 (en)	1972-12-28
DE2230842C3 (en)	1980-10-16
NL7208607A (en)	1972-12-28
US3798373A (en)	1974-03-19
DE2230842B2 (en)	1980-02-21
GB1396352A (en)	1975-06-04

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