GB1385651A - Matrices and decoders for quadruphonic sound systems - Google Patents

Matrices and decoders for quadruphonic sound systems

Info

Publication number
GB1385651A
GB1385651A GB497472A GB497472A GB1385651A GB 1385651 A GB1385651 A GB 1385651A GB 497472 A GB497472 A GB 497472A GB 497472 A GB497472 A GB 497472A GB 1385651 A GB1385651 A GB 1385651A
Authority
GB
United Kingdom
Prior art keywords
signals
channel
phase
main components
relative
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
Application number
GB497472A
Other languages
English (en)
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.)
Filing date
Publication date
Application filed by CBS Inc filed Critical CBS Inc
Publication of GB1385651A publication Critical patent/GB1385651A/en
Expired legal-status Critical Current

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)
  • Fuel Cell (AREA)
GB497472A 1971-02-03 1972-02-02 Matrices and decoders for quadruphonic sound systems Expired GB1385651A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1385651A true GB1385651A (en) 1975-02-26

Family

ID=22342450

Family Applications (2)

Application Number Title Priority Date Filing Date
GB497472A Expired GB1385651A (en) 1971-02-03 1972-02-02 Matrices and decoders for quadruphonic sound systems
GB497472A Expired GB1379846A (en) 1971-02-03 1972-07-11 Gas diffusion electrode for electrochemical cells

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB497472A Expired GB1379846A (en) 1971-02-03 1972-07-11 Gas diffusion electrode for electrochemical cells

Country Status (10)

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

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 (enExample) * 1972-02-25 1973-11-22
JPS5210364B2 (enExample) * 1972-05-02 1977-03-23
GB1416631A (en) * 1972-05-30 1975-12-03 Nippon Columbia Discrete 4-channel stereo recording and/or reproducing system
JPS5332643B2 (enExample) * 1972-06-06 1978-09-09
JPS5246681B2 (enExample) * 1972-12-29 1977-11-26
JPS5248002B2 (enExample) * 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

Also Published As

Publication number Publication date
US3745252A (en) 1973-07-10
JPS50152701A (enExample) 1975-12-09
DE2204098A1 (de) 1972-08-17
GB1379846A (en) 1975-01-08
BE778296A (fr) 1972-07-20
FR2124264A1 (enExample) 1972-09-22
DE2204098B2 (de) 1978-02-09
JPS5110961B1 (enExample) 1976-04-08
JPS5140442B2 (enExample) 1976-11-04
CA974887A (en) 1975-09-23
NL7200834A (enExample) 1972-08-07
IT948353B (it) 1973-05-30
IL38277A0 (en) 1972-02-29
DE2204098C3 (de) 1978-09-21
IL38277A (en) 1974-05-16

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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