FR2255770B1 - - Google Patents

Info

Publication number
FR2255770B1
FR2255770B1 FR7442401A FR7442401A FR2255770B1 FR 2255770 B1 FR2255770 B1 FR 2255770B1 FR 7442401 A FR7442401 A FR 7442401A FR 7442401 A FR7442401 A FR 7442401A FR 2255770 B1 FR2255770 B1 FR 2255770B1
Authority
FR
France
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
FR7442401A
Other versions
FR2255770A1 (fr
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 FR2255770A1 publication Critical patent/FR2255770A1/fr
Application granted granted Critical
Publication of FR2255770B1 publication Critical patent/FR2255770B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/006—Systems employing more than two channels, e.g. quadraphonic in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Stereophonic System (AREA)
  • Stereo-Broadcasting Methods (AREA)
FR7442401A 1973-12-20 1974-12-20 Expired FR2255770B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48143326A JPS5093602A (fr) 1973-12-20 1973-12-20

Publications (2)

Publication Number Publication Date
FR2255770A1 FR2255770A1 (fr) 1975-07-18
FR2255770B1 true FR2255770B1 (fr) 1982-06-18

Family

ID=15336173

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7442401A Expired FR2255770B1 (fr) 1973-12-20 1974-12-20

Country Status (7)

Country Link
US (1) US4006313A (fr)
JP (1) JPS5093602A (fr)
CA (1) CA1040714A (fr)
DE (1) DE2459682A1 (fr)
FR (1) FR2255770B1 (fr)
GB (1) GB1454860A (fr)
NL (1) NL7416529A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100622078B1 (ko) * 2005-11-21 2006-09-13 주식회사 솔리토닉스 초지향성 스피커 시스템 및 신호처리 방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE544453A (fr) * 1955-01-17
US3311828A (en) * 1963-02-12 1967-03-28 Internat Microwave Corp Communication system, methods, and apparatus utilizing vestigial-sideband, suppressed-carrier p.c.m. signals
US3665345A (en) * 1969-07-21 1972-05-23 Dolby Laboratories Inc Compressors and expanders for noise reduction systems
US3869583A (en) * 1971-08-05 1975-03-04 Columbia Broadcasting Syst Inc Quadruphonic disc recording system utilizing single sideband modulation
US3761628A (en) * 1972-04-13 1973-09-25 Columbia Broadcasting Syst Inc Stereo-quadraphonic matrix system with matrix or discrete sound reproduction capability
US3735290A (en) * 1972-04-18 1973-05-22 Victor Company Of Japan Compressing and/or expanding system comprising fixed and variable frequency characteristic changing circuits

Also Published As

Publication number Publication date
US4006313A (en) 1977-02-01
FR2255770A1 (fr) 1975-07-18
NL7416529A (nl) 1975-06-24
CA1040714A (fr) 1978-10-17
JPS5093602A (fr) 1975-07-25
GB1454860A (en) 1976-11-03
DE2459682A1 (de) 1975-07-03

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Legal Events

Date Code Title Description
ST Notification of lapse