FR2257978B1 - - Google Patents

Info

Publication number
FR2257978B1
FR2257978B1 FR7429719A FR7429719A FR2257978B1 FR 2257978 B1 FR2257978 B1 FR 2257978B1 FR 7429719 A FR7429719 A FR 7429719A FR 7429719 A FR7429719 A FR 7429719A FR 2257978 B1 FR2257978 B1 FR 2257978B1
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
FR7429719A
Other versions
FR2257978A1 (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 FR2257978A1 publication Critical patent/FR2257978A1/fr
Application granted granted Critical
Publication of FR2257978B1 publication Critical patent/FR2257978B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00992—Circuits for stereophonic or quadraphonic recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
FR7429719A 1973-08-30 1974-08-30 Expired FR2257978B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1973101822U JPS5434569Y2 (fr) 1973-08-30 1973-08-30

Publications (2)

Publication Number Publication Date
FR2257978A1 FR2257978A1 (fr) 1975-08-08
FR2257978B1 true FR2257978B1 (fr) 1979-04-06

Family

ID=14310796

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7429719A Expired FR2257978B1 (fr) 1973-08-30 1974-08-30

Country Status (8)

Country Link
US (1) US3939489A (fr)
JP (1) JPS5434569Y2 (fr)
CA (1) CA1001083A (fr)
DE (1) DE2441435A1 (fr)
FR (1) FR2257978B1 (fr)
GB (1) GB1477217A (fr)
IT (1) IT1020368B (fr)
NL (1) NL7411593A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095261A (en) * 1976-01-07 1978-06-13 Jesus Rodriguez Audio tape recorder, editor and amplifying system
GB2157475A (en) * 1984-04-12 1985-10-23 Hwang Sung Ting Audio recording
US5225944A (en) * 1988-03-31 1993-07-06 Seiko Epson Corporation Portable audio apparatus
US5208717A (en) * 1988-03-31 1993-05-04 Seiko Epson Corporation Portable information reproducing and voice amplifying apparatus
US5349480A (en) * 1988-03-31 1994-09-20 Seiko Epson Corporation Portable audio apparatus
JP2005266198A (ja) * 2004-03-18 2005-09-29 Pioneer Electronic Corp 音響情報再生装置および音楽データのキーワード作成方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3401237A (en) * 1962-08-27 1968-09-10 Victor Company Of Japan Simultaneous recording of two signals per channel
JPS4938054B1 (fr) * 1968-05-09 1974-10-15
US3831190A (en) * 1969-12-24 1974-08-20 Borg Warner System for production of recording
GB1410772A (en) * 1971-08-11 1975-10-22 Nippon Columbia Audio frequency signal changing circuits

Also Published As

Publication number Publication date
DE2441435A1 (de) 1975-03-13
GB1477217A (en) 1977-06-22
NL7411593A (nl) 1975-03-04
JPS5048605U (fr) 1975-05-14
FR2257978A1 (fr) 1975-08-08
IT1020368B (it) 1977-12-20
US3939489A (en) 1976-02-17
CA1001083A (en) 1976-12-07
JPS5434569Y2 (fr) 1979-10-23

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Legal Events

Date Code Title Description
ST Notification of lapse