CA1122702A - Analog recording on magnetic media - Google Patents
Analog recording on magnetic mediaInfo
- Publication number
- CA1122702A CA1122702A CA318,678A CA318678A CA1122702A CA 1122702 A CA1122702 A CA 1122702A CA 318678 A CA318678 A CA 318678A CA 1122702 A CA1122702 A CA 1122702A
- Authority
- CA
- Canada
- Prior art keywords
- audio signals
- varying
- predetermined
- amplitude
- record
- 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
Links
- 238000001228 spectrum Methods 0.000 claims abstract description 32
- 230000004044 response Effects 0.000 claims abstract description 29
- 230000005236 sound signal Effects 0.000 claims description 55
- 230000035945 sensitivity Effects 0.000 claims description 12
- 230000001419 dependent effect Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000009499 grossing Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 230000005669 field effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- 241000272470 Circus Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
- H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
-
- 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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/03—Biasing
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86454177A | 1977-12-27 | 1977-12-27 | |
| US864,541 | 1977-12-27 | ||
| US96868478A | 1978-12-12 | 1978-12-12 | |
| US968,684 | 1978-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1122702A true CA1122702A (en) | 1982-04-27 |
Family
ID=27127845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA318,678A Expired CA1122702A (en) | 1977-12-27 | 1978-12-27 | Analog recording on magnetic media |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS54106215A (de) |
| AT (1) | AT370901B (de) |
| CA (1) | CA1122702A (de) |
| DE (1) | DE2855259A1 (de) |
| DK (1) | DK583278A (de) |
| FR (1) | FR2413741A1 (de) |
| GB (1) | GB2013958B (de) |
| NL (1) | NL7812490A (de) |
| SE (1) | SE7813317L (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4263624A (en) * | 1978-12-12 | 1981-04-21 | Dolby Laboratories Licensing Corporation | Analog recording on magnetic media |
| US4314289A (en) * | 1979-12-07 | 1982-02-02 | International Business Machines Corporation | Biased pulsed recording systems and methods |
| EP0046410B1 (de) * | 1980-08-20 | 1984-10-31 | Bang & Olufsen A/S | Verfahren und Vorrichtung zur Kontrolle der Vormagnetisierung bei magnetischer Aufzeichnung |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2628287A (en) * | 1951-02-16 | 1953-02-10 | Nathan M Haynes | Magnetic recording apparatus |
| DE1064732B (de) * | 1957-10-22 | 1959-09-03 | Loewe Opta Ag | Schaltungsanordnung zur Aufzeichnung von Tonschwingungen mit freqeunzabhaengiger Hochfrequenz-Vormagnetisierung auf bandfoermige Magnetogrammtraeger |
| DE1099199B (de) * | 1958-03-25 | 1961-02-09 | Loewe Opta Ag | Schaltungsanordnung zur Steuerung der Amplitude einer hochfrequenten Vormagnetisierung fuer Magnetbandaufzeichnung |
| US3665345A (en) * | 1969-07-21 | 1972-05-23 | Dolby Laboratories Inc | Compressors and expanders for noise reduction systems |
| JPS5319923B1 (de) * | 1970-12-19 | 1978-06-23 | ||
| US4011585A (en) * | 1974-07-12 | 1977-03-08 | Pioneer Electronic Corporation | Magnetic recording reproducing system |
| JPS5230440U (de) * | 1975-08-22 | 1977-03-03 |
-
1978
- 1978-12-21 DE DE19782855259 patent/DE2855259A1/de not_active Withdrawn
- 1978-12-21 GB GB7849682A patent/GB2013958B/en not_active Expired
- 1978-12-22 FR FR7836151A patent/FR2413741A1/fr not_active Withdrawn
- 1978-12-22 NL NL7812490A patent/NL7812490A/xx not_active Application Discontinuation
- 1978-12-27 CA CA318,678A patent/CA1122702A/en not_active Expired
- 1978-12-27 AT AT0930178A patent/AT370901B/de not_active IP Right Cessation
- 1978-12-27 DK DK583278A patent/DK583278A/da not_active Application Discontinuation
- 1978-12-27 JP JP16449878A patent/JPS54106215A/ja active Pending
- 1978-12-27 SE SE7813317A patent/SE7813317L/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB2013958B (en) | 1982-05-06 |
| ATA930178A (de) | 1982-09-15 |
| AT370901B (de) | 1983-05-10 |
| SE7813317L (sv) | 1979-06-28 |
| FR2413741A1 (fr) | 1979-07-27 |
| DE2855259A1 (de) | 1979-07-05 |
| NL7812490A (nl) | 1979-06-29 |
| JPS54106215A (en) | 1979-08-21 |
| GB2013958A (en) | 1979-08-15 |
| DK583278A (da) | 1979-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |