GB1384610A - Apparatus for reproducing quadraphonic sound - Google Patents

Apparatus for reproducing quadraphonic sound

Info

Publication number
GB1384610A
GB1384610A GB2811172A GB2811172A GB1384610A GB 1384610 A GB1384610 A GB 1384610A GB 2811172 A GB2811172 A GB 2811172A GB 2811172 A GB2811172 A GB 2811172A GB 1384610 A GB1384610 A GB 1384610A
Authority
GB
United Kingdom
Prior art keywords
signals
phase
signal
input
gain
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
GB2811172A
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB1384610A publication Critical patent/GB1384610A/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)
GB2811172A 1971-06-21 1972-06-15 Apparatus for reproducing quadraphonic sound Expired GB1384610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46044622A JPS5147321B1 (enrdf_load_stackoverflow) 1971-06-21 1971-06-21

Publications (1)

Publication Number Publication Date
GB1384610A true GB1384610A (en) 1975-02-19

Family

ID=12696520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2811172A Expired GB1384610A (en) 1971-06-21 1972-06-15 Apparatus for reproducing quadraphonic sound

Country Status (8)

Country Link
US (1) US3821474A (enrdf_load_stackoverflow)
JP (1) JPS5147321B1 (enrdf_load_stackoverflow)
CA (1) CA976485A (enrdf_load_stackoverflow)
DE (1) DE2230162A1 (enrdf_load_stackoverflow)
FR (1) FR2143223B1 (enrdf_load_stackoverflow)
GB (1) GB1384610A (enrdf_load_stackoverflow)
IT (1) IT956758B (enrdf_load_stackoverflow)
NL (1) NL7208328A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003771A1 (en) * 1985-12-06 1987-06-18 Sparkjaer Ole A method and a circuit for decoding four-channel signals which are coded in a matrix and available in the form of a two-channel signal
US9661190B2 (en) 2012-05-31 2017-05-23 Dolby Laboratories Licensing Corporation Low latency and low complexity phase shift network

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967063A (en) * 1971-06-23 1976-06-29 Cbs Inc. Logic for matrix systems for reproducing quadraphonic sound
DE2445123C3 (de) * 1973-09-26 1980-03-06 Hitachi, Ltd. Analogsignal-Verarbeitungsschaltung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003771A1 (en) * 1985-12-06 1987-06-18 Sparkjaer Ole A method and a circuit for decoding four-channel signals which are coded in a matrix and available in the form of a two-channel signal
US4850021A (en) * 1985-12-06 1989-07-18 Sparkjaer Ole Method and a circuit for decoding four channel signals which are coded in a matrix and available in the form of a two-channel signal
US9661190B2 (en) 2012-05-31 2017-05-23 Dolby Laboratories Licensing Corporation Low latency and low complexity phase shift network

Also Published As

Publication number Publication date
DE2230162A1 (de) 1973-04-26
US3821474A (en) 1974-06-28
IT956758B (it) 1973-10-10
FR2143223B1 (enrdf_load_stackoverflow) 1977-12-23
CA976485A (en) 1975-10-21
FR2143223A1 (enrdf_load_stackoverflow) 1973-02-02
NL7208328A (enrdf_load_stackoverflow) 1972-12-27
JPS5147321B1 (enrdf_load_stackoverflow) 1976-12-14

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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