FR2221779B1 - - Google Patents
Info
- Publication number
- FR2221779B1 FR2221779B1 FR7345603A FR7345603A FR2221779B1 FR 2221779 B1 FR2221779 B1 FR 2221779B1 FR 7345603 A FR7345603 A FR 7345603A FR 7345603 A FR7345603 A FR 7345603A FR 2221779 B1 FR2221779 B1 FR 2221779B1
- 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
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
-
- 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
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- General Health & Medical Sciences (AREA)
- Algebra (AREA)
- Health & Medical Sciences (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Otolaryngology (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Credit Cards Or The Like (AREA)
- Electric Clocks (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Stereophonic System (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1973003987U JPS5653457Y2 (fr) | 1972-12-29 | 1972-12-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2221779A1 FR2221779A1 (fr) | 1974-10-11 |
FR2221779B1 true FR2221779B1 (fr) | 1977-06-10 |
Family
ID=11572361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7345603A Expired FR2221779B1 (fr) | 1972-12-29 | 1973-12-19 |
Country Status (7)
Country | Link |
---|---|
US (1) | US3914790A (fr) |
JP (1) | JPS5653457Y2 (fr) |
CA (1) | CA981590A (fr) |
DE (1) | DE2364480A1 (fr) |
FR (1) | FR2221779B1 (fr) |
GB (1) | GB1430210A (fr) |
NL (1) | NL7317350A (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS527708A (en) * | 1975-07-08 | 1977-01-21 | Sony Corp | Tape recorder |
US4479235A (en) * | 1981-05-08 | 1984-10-23 | Rca Corporation | Switching arrangement for a stereophonic sound synthesizer |
JPH04265569A (ja) * | 1991-02-19 | 1992-09-21 | Canon Inc | 音声信号記録装置及び再生装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3730532A (en) * | 1970-06-09 | 1973-05-01 | Victor Company Of Japan | Combination four-channel two-channel stereophonic endless cartridge tape player |
US3684835A (en) * | 1970-07-29 | 1972-08-15 | Parasound Inc | Four channel stereo synthesizer |
US3761628A (en) * | 1972-04-13 | 1973-09-25 | Columbia Broadcasting Syst Inc | Stereo-quadraphonic matrix system with matrix or discrete sound reproduction capability |
-
1972
- 1972-12-29 JP JP1973003987U patent/JPS5653457Y2/ja not_active Expired
-
1973
- 1973-12-13 GB GB5782373A patent/GB1430210A/en not_active Expired
- 1973-12-13 US US424306A patent/US3914790A/en not_active Expired - Lifetime
- 1973-12-18 NL NL7317350A patent/NL7317350A/xx active Search and Examination
- 1973-12-19 FR FR7345603A patent/FR2221779B1/fr not_active Expired
- 1973-12-24 DE DE2364480A patent/DE2364480A1/de not_active Withdrawn
- 1973-12-28 CA CA189,129A patent/CA981590A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5653457Y2 (fr) | 1981-12-12 |
GB1430210A (en) | 1976-03-31 |
NL7317350A (fr) | 1974-07-02 |
DE2364480A1 (de) | 1974-07-04 |
CA981590A (en) | 1976-01-13 |
JPS49108017U (fr) | 1974-09-14 |
FR2221779A1 (fr) | 1974-10-11 |
US3914790A (en) | 1975-10-21 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |