GB1396353A - Sound reproduction system - Google Patents

Sound reproduction system

Info

Publication number
GB1396353A
GB1396353A GB4074072A GB4074072A GB1396353A GB 1396353 A GB1396353 A GB 1396353A GB 4074072 A GB4074072 A GB 4074072A GB 4074072 A GB4074072 A GB 4074072A GB 1396353 A GB1396353 A GB 1396353A
Authority
GB
United Kingdom
Prior art keywords
signal
level
logic circuit
input
signals
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
GB4074072A
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 GB1396353A publication Critical patent/GB1396353A/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)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
GB4074072A 1971-09-01 1972-09-01 Sound reproduction system Expired GB1396353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17700271A 1971-09-01 1971-09-01

Publications (1)

Publication Number Publication Date
GB1396353A true GB1396353A (en) 1975-06-04

Family

ID=22646778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4074072A Expired GB1396353A (en) 1971-09-01 1972-09-01 Sound reproduction system

Country Status (4)

Country Link
US (1) US3794781A (https=)
JP (1) JPS4833802A (https=)
DE (1) DE2242845A1 (https=)
GB (1) GB1396353A (https=)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1514162A (en) * 1974-03-25 1978-06-14 Ruggles W Directional enhancement system for quadraphonic decoders
JPS5533840Y2 (https=) * 1974-04-02 1980-08-11
US3937885A (en) * 1974-09-06 1976-02-10 Motorola, Inc. Control circuit for a matrixed four channel audio reproducing system
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
JP4624643B2 (ja) 2000-08-31 2011-02-02 ドルビー・ラボラトリーズ・ライセンシング・コーポレーション オーディオ・マトリックス・デコーディング装置に関する方法
US20050090936A1 (en) * 2003-10-24 2005-04-28 Hitt Dale K. Two-wire control of sprinkler 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
JPS4833802A (https=) 1973-05-14
DE2242845A1 (de) 1973-03-08
US3794781A (en) 1974-02-26

Similar Documents

Publication Publication Date Title
GB1347994A (en) Sound recording and reproduction
US3783192A (en) Decoder for use in matrix four-channel system
GB1367705A (en) Audio reproduction systems
GB1335738A (en) Compatible four channel fm system
GB1367191A (en) Multisound reproducing apparatus
GB1450533A (en) Stereo sound reproducing apparatus
GB1402320A (en) Decoder for use in 4-2-4 matrix playback system
GB1460066A (en) Amplifier output switching circuits
GB1387874A (en) Apparatus for recording and reproducing quadraphonic sound
GB1396352A (en) Apparatus for reproducing quadraphonic sound
GB1332514A (en) Detector with inactivating circuitry
GB1396353A (en) Sound reproduction system
GB1398786A (en) Multisignal transmission apparatus
GB1476516A (en) Automatic gain control circuit
GB1411408A (en) Decoder for use in sq matrix fourchannel system
GB1379771A (en) Decoder for quadruphonic sound
GB1430950A (en) Integrated logic circuit for the decoder of a multi-channel stereo apparatus
JPS57159200A (en) Stereophonic synthesizer
GB1529080A (en) Mpx stereo signal demodulators
GB1377138A (en) Four channel arrangements
SE7700608L (sv) Avskiljare och forsterkare for fergutbrott
GB1384610A (en) Apparatus for reproducing quadraphonic sound
GB1006902A (en) Reverberatory amplifiers
GB1396354A (en) Sound reproduction systems
GB1307074A (en) Automatic volume control system for multichannel amplifier

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees