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
Application number
NL7209930A
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.)
Filing date
Publication date
Application filed filed Critical
Publication of NL7209930A publication Critical patent/NL7209930A/xx

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
NL7209930A 1971-07-19 1972-07-18 NL7209930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46053771A JPS5213082B1 (en) 1971-07-19 1971-07-19

Publications (1)

Publication Number Publication Date
NL7209930A true NL7209930A (en) 1973-01-23

Family

ID=12952066

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7209930A NL7209930A (en) 1971-07-19 1972-07-18

Country Status (8)

Country Link
US (1) US3786193A (en)
JP (1) JPS5213082B1 (en)
CA (2) CA991086A (en)
DE (1) DE2235238A1 (en)
FR (1) FR2146394B1 (en)
GB (1) GB1400061A (en)
IT (1) IT963000B (en)
NL (1) NL7209930A (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
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 (en) * 1972-05-02 1977-03-23
DE2227705C3 (en) * 1972-06-07 1975-09-11 Polygram Gmbh, 2000 Hamburg Method for producing multi-channel, preferably four-channel (quadraphonic) sound information
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 (en) * 1972-09-09 1977-09-08
DE2252132C3 (en) 1972-10-24 1982-08-26 Sansui Electric Co., Ltd., Tokyo Decoder for a 4-2-4 matrix system
DE2253696B1 (en) * 1972-11-02 1974-02-21 Electroacustic Gmbh, 2300 Kiel PROCESS FOR REDUCING INTERFERENCE VOLTAGE DURING MULTI-CHANNEL REPRODUCTION OF ACOUSTIC REPRESENTATIONS
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 (en) * 1973-03-07 1978-06-07
JPS5248001B2 (en) * 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
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
EP2190221B1 (en) * 2008-11-20 2018-09-12 Harman Becker Automotive Systems GmbH Audio system

Family Cites Families (2)

* 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
US3708631A (en) * 1970-06-08 1973-01-02 Columbia Broadcasting Syst Inc Quadraphonic reproducing system with gain control

Also Published As

Publication number Publication date
FR2146394A1 (en) 1973-03-02
IT963000B (en) 1973-12-31
US3786193A (en) 1974-01-15
JPS5213082B1 (en) 1977-04-12
GB1400061A (en) 1975-07-16
CA991086A (en) 1976-06-15
CA1001957A (en) 1976-12-21
DE2235238A1 (en) 1973-02-01
FR2146394B1 (en) 1977-04-01

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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