FR2229181B1 - - Google Patents

Info

Publication number
FR2229181B1
FR2229181B1 FR7415992A FR7415992A FR2229181B1 FR 2229181 B1 FR2229181 B1 FR 2229181B1 FR 7415992 A FR7415992 A FR 7415992A FR 7415992 A FR7415992 A FR 7415992A FR 2229181 B1 FR2229181 B1 FR 2229181B1
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
FR7415992A
Other languages
French (fr)
Other versions
FR2229181A1 (ja
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
Application filed by Individual filed Critical Individual
Publication of FR2229181A1 publication Critical patent/FR2229181A1/fr
Application granted granted Critical
Publication of FR2229181B1 publication Critical patent/FR2229181B1/fr
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04SSTEREOPHONIC SYSTEMS 
    • H04S3/00Systems employing more than two channels, e.g. quadraphonic
    • H04S3/006Systems 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00992Circuits for stereophonic or quadraphonic recording or reproducing
FR7415992A 1973-05-10 1974-05-09 Expired FR2229181B1 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48052076A JPS5247884B2 (ja) 1973-05-10 1973-05-10

Publications (2)

Publication Number Publication Date
FR2229181A1 FR2229181A1 (ja) 1974-12-06
FR2229181B1 true FR2229181B1 (ja) 1982-03-26

Family

ID=12904714

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7415992A Expired FR2229181B1 (ja) 1973-05-10 1974-05-09

Country Status (6)

Country Link
JP (1) JPS5247884B2 (ja)
CA (1) CA1006826A (ja)
DE (1) DE2422423C2 (ja)
FR (1) FR2229181B1 (ja)
GB (1) GB1473531A (ja)
NL (1) NL7406328A (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938112U (ja) * 1972-07-04 1974-04-04
JPS5437223Y2 (ja) * 1974-12-18 1979-11-08
JPS52161015U (ja) * 1976-05-29 1977-12-07
JPS53128210A (en) * 1977-04-15 1978-11-09 Nippon Gakki Seizo Kk Display unit for receiving frequency
JPS557607A (en) * 1978-06-30 1980-01-19 Yaesu Musen Co Ltd Digital display system by measuring sum or difference between two frequencies
JPS55164278U (ja) * 1979-05-11 1980-11-26

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906156A (en) * 1971-10-06 1975-09-16 Duane H Cooper Signal matrixing for directional reproduction of sound

Also Published As

Publication number Publication date
NL7406328A (ja) 1974-11-12
JPS5019404A (ja) 1975-02-28
FR2229181A1 (ja) 1974-12-06
DE2422423A1 (de) 1974-11-28
CA1006826A (en) 1977-03-15
DE2422423C2 (de) 1986-03-06
GB1473531A (en) 1977-05-11
JPS5247884B2 (ja) 1977-12-06

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse