GB1411995A - Signal matrixing for directional reproduction of sound - Google Patents

Signal matrixing for directional reproduction of sound

Info

Publication number
GB1411995A
GB1411995A GB1343875A GB1343875A GB1411995A GB 1411995 A GB1411995 A GB 1411995A GB 1343875 A GB1343875 A GB 1343875A GB 1343875 A GB1343875 A GB 1343875A GB 1411995 A GB1411995 A GB 1411995A
Authority
GB
United Kingdom
Prior art keywords
sound
quadraphonic
reproduction
directional reproduction
matrixing
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
GB1343875A
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US00187065A external-priority patent/US3856992A/en
Priority claimed from US288873A external-priority patent/US3906156A/en
Application filed by Individual filed Critical Individual
Publication of GB1411995A publication Critical patent/GB1411995A/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)

Abstract

1411995 Quadraphonic systems D H COOPER 3 Oct 1972 [6 Oct 1971 13 Sept 1972] 13438/75 Heading H4R The description is substantially the same as that of Specification 1,411,994, but the claims relate in general terms to the use of an auxiliary channel in addition to the two channels utilizable for mono, stereo and quadraphonic reproduction, the use of the auxiliary channel being said to improve the directivity of quadraphonic arrangement.
GB1343875A 1971-10-06 1972-10-03 Signal matrixing for directional reproduction of sound Expired GB1411995A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US00187065A US3856992A (en) 1971-10-06 1971-10-06 Multidirectional sound reproduction
US288873A US3906156A (en) 1971-10-06 1972-09-13 Signal matrixing for directional reproduction of sound
GB4555872A GB1411994A (en) 1971-10-06 1972-10-03 Signal matrixing for directional reproduction of sound

Publications (1)

Publication Number Publication Date
GB1411995A true GB1411995A (en) 1975-10-29

Family

ID=27259895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1343875A Expired GB1411995A (en) 1971-10-06 1972-10-03 Signal matrixing for directional reproduction of sound

Country Status (1)

Country Link
GB (1) GB1411995A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years