DE68915840D1 - Magnetisches Aufzeichnungs- und Wiedergabegerät für digitale Signale zur Verwendung bei der Quadraturamplitudenmodulation. - Google Patents
Magnetisches Aufzeichnungs- und Wiedergabegerät für digitale Signale zur Verwendung bei der Quadraturamplitudenmodulation.Info
- Publication number
- DE68915840D1 DE68915840D1 DE68915840T DE68915840T DE68915840D1 DE 68915840 D1 DE68915840 D1 DE 68915840D1 DE 68915840 T DE68915840 T DE 68915840T DE 68915840 T DE68915840 T DE 68915840T DE 68915840 D1 DE68915840 D1 DE 68915840D1
- Authority
- DE
- Germany
- Prior art keywords
- digital signal
- reproducing apparatus
- amplitude modulation
- signal recording
- quadrature amplitude
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
-
- 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
- G11B20/10—Digital recording or reproducing
-
- 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
- G11B20/10—Digital recording or reproducing
- G11B20/14—Digital recording or reproducing using self-clocking codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
- H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
- H04N5/935—Regeneration of digital synchronisation signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/87—Regeneration of colour television signals
- H04N9/8722—Regeneration of a colour reference signal, e.g. the colour synchronisaton burst signal, the chrominance signal carrier
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7361688A JP2512069B2 (ja) | 1988-03-28 | 1988-03-28 | ディジタル磁気記録再生装置 |
JP63130604A JPH01300409A (ja) | 1988-05-27 | 1988-05-27 | ディジタル磁気記録再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68915840D1 true DE68915840D1 (de) | 1994-07-14 |
DE68915840T2 DE68915840T2 (de) | 1994-09-15 |
Family
ID=26414756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68915840T Expired - Fee Related DE68915840T2 (de) | 1988-03-28 | 1989-03-28 | Magnetisches Aufzeichnungs- und Wiedergabegerät für digitale Signale zur Verwendung bei der Quadraturamplitudenmodulation. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5124861A (de) |
EP (1) | EP0335346B1 (de) |
KR (1) | KR930007937B1 (de) |
DE (1) | DE68915840T2 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2553743B2 (ja) * | 1990-07-05 | 1996-11-13 | 松下電器産業株式会社 | ディジタル信号磁気記録再生装置 |
US5402272A (en) * | 1990-10-04 | 1995-03-28 | Matsushita Electric Industrial Co., Ltd. | Digital signal magnetic recording/reproducing apparatus using amplitude phase shift keying and frequency-multiplexing |
JPH05282799A (ja) * | 1992-04-01 | 1993-10-29 | Sony Corp | 情報記録装置 |
KR0165277B1 (ko) * | 1993-02-27 | 1999-03-20 | 김광호 | 디지탈신호 자기 기록 재생장치 |
US6122126A (en) * | 1993-08-03 | 2000-09-19 | Sony Corporation | Digital magnetic reproducing apparatus and digital magnetic recording/reproducing apparatus employing detection of second harmonic distortion and bias current control |
US5798667A (en) * | 1994-05-16 | 1998-08-25 | At&T Global Information Solutions Company | Method and apparatus for regulation of power dissipation |
DE69839396T2 (de) * | 1997-06-13 | 2009-05-07 | Kabushiki Kaisha Kenwood | Schaltung zur taktwiederherstellung |
US6208594B1 (en) | 1998-06-02 | 2001-03-27 | Seagate Technology Llc | Efficient linearization of saturation channels |
WO1999063530A1 (en) * | 1998-06-02 | 1999-12-09 | Seagate Technology, Inc. | A magneto-optical recording system employing linear recording and playback channels |
US6687205B1 (en) | 1998-06-09 | 2004-02-03 | Seagate Technology Llc | Parallel coded spread spectrum communication for data storage |
US6542443B1 (en) * | 1999-06-02 | 2003-04-01 | Seagate Technology Llc | Efficient linearization of saturation channels |
US20030053794A1 (en) * | 2001-09-19 | 2003-03-20 | Alexei Krouglov | Method and device for digital data magnetic recording and reproduction of composite video signals |
US7535841B1 (en) * | 2003-05-14 | 2009-05-19 | Nortel Networks Limited | Flow-rate-regulated burst switches |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57170652A (en) * | 1981-04-15 | 1982-10-20 | Nec Corp | Transmitting system for burst signal |
US4606048A (en) * | 1983-04-06 | 1986-08-12 | Fujitsu Limited | Radio communication system |
FR2544571B1 (fr) * | 1983-04-12 | 1985-06-14 | Prigent Jean Pierre | Recuperation des frequences de porteuse et de rythme pour les systemes de transmission numerique a modulation a etats de phase ou d'amplitude et a demodulation coherente |
JPS60162337A (ja) * | 1984-02-02 | 1985-08-24 | Fujitsu Ltd | 搬送波再生回路 |
JPS60192488A (ja) * | 1984-03-14 | 1985-09-30 | Toshiba Corp | 記録再生装置 |
US4700151A (en) * | 1985-03-20 | 1987-10-13 | Nec Corporation | Modulation system capable of improving a transmission system |
DE3689746T2 (de) * | 1985-06-21 | 1994-09-22 | Hitachi Ltd | Aufnahme- und Wiedergabevorrichtung unter Verwendung eines Modulators/Demodulators mit verschobener quaternärer Phasendifferenzumtastung. |
US4979052A (en) * | 1987-09-29 | 1990-12-18 | Matsushita Electric Industrial Co., Ltd. | Digital signal magnetic recording/reproducing apparatus |
-
1989
- 1989-03-27 KR KR1019890003832A patent/KR930007937B1/ko not_active IP Right Cessation
- 1989-03-28 DE DE68915840T patent/DE68915840T2/de not_active Expired - Fee Related
- 1989-03-28 EP EP89105481A patent/EP0335346B1/de not_active Expired - Lifetime
- 1989-03-28 US US07/329,720 patent/US5124861A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR890015241A (ko) | 1989-10-28 |
EP0335346A3 (de) | 1991-07-17 |
KR930007937B1 (ko) | 1993-08-21 |
US5124861A (en) | 1992-06-23 |
EP0335346B1 (de) | 1994-06-08 |
DE68915840T2 (de) | 1994-09-15 |
EP0335346A2 (de) | 1989-10-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |