JPS5756263B2 - - Google Patents

Info

Publication number
JPS5756263B2
JPS5756263B2 JP47097352A JP9735272A JPS5756263B2 JP S5756263 B2 JPS5756263 B2 JP S5756263B2 JP 47097352 A JP47097352 A JP 47097352A JP 9735272 A JP9735272 A JP 9735272A JP S5756263 B2 JPS5756263 B2 JP S5756263B2
Authority
JP
Japan
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
JP47097352A
Other versions
JPS4953715A (ja
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 filed Critical
Priority to JP47097352A priority Critical patent/JPS5756263B2/ja
Priority to US00401300A priority patent/US3849595A/en
Publication of JPS4953715A publication Critical patent/JPS4953715A/ja
Publication of JPS5756263B2 publication Critical patent/JPS5756263B2/ja
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/4135—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which a baseband signal showing more than two values or a continuously varying baseband signal is transmitted or recorded
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP47097352A 1972-09-28 1972-09-28 Expired JPS5756263B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP47097352A JPS5756263B2 (ja) 1972-09-28 1972-09-28
US00401300A US3849595A (en) 1972-09-28 1973-09-27 Facsimile signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47097352A JPS5756263B2 (ja) 1972-09-28 1972-09-28

Publications (2)

Publication Number Publication Date
JPS4953715A JPS4953715A (ja) 1974-05-24
JPS5756263B2 true JPS5756263B2 (ja) 1982-11-29

Family

ID=14190081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP47097352A Expired JPS5756263B2 (ja) 1972-09-28 1972-09-28

Country Status (2)

Country Link
US (1) US3849595A (ja)
JP (1) JPS5756263B2 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988539A (en) * 1974-09-16 1976-10-26 Hycom Incorporated Data transmission system using optimal eight-vector signaling scheme
JPS5224409A (en) * 1975-08-20 1977-02-23 Fujitsu Ltd Partial response modulation system
US4084137A (en) * 1976-08-24 1978-04-11 Communications Satellite Corporation Multidimensional code communication systems
JPS5547754A (en) * 1978-10-03 1980-04-04 Nec Corp Modulation and demodulation system of digital multi- value and multi-phase
IL63117A (en) * 1981-06-18 1984-05-31 Schwartz Nira Apparatus and method for transmission of communications
US4442530A (en) * 1981-09-21 1984-04-10 Racal Data Communications Inc. Digital transmitter with vector component addressing
US4739413A (en) * 1985-06-14 1988-04-19 Luma Telecom, Inc. Video-optimized modulator-demodulator with adjacent modulating amplitudes matched to adjacent pixel gray values
SE463540B (sv) * 1988-09-19 1990-12-03 Ericsson Telefon Ab L M Saett foer att i ett radiokommunikationssystem digitalisera godtyckliga radiosignaler samt anordning foer utoevande av saettet
US5623520A (en) * 1994-06-21 1997-04-22 Northrop Grumman Corporation Correlation detector employing two level A/D conversion and arithmetic sign control
JP3097075B2 (ja) * 1997-12-03 2000-10-10 日本電気株式会社 一定振幅変調器
US6148428A (en) 1998-05-21 2000-11-14 Calimetrics, Inc. Method and apparatus for modulation encoding data for storage on a multi-level optical recording medium
US6462679B1 (en) 2000-07-19 2002-10-08 Vdv Media Technologies, Inc. Method and apparatus for modulating a signal
US8737516B2 (en) 2011-09-21 2014-05-27 Nigel Iain Stuart Macrae Amplitude modulation of carrier to encode data

Also Published As

Publication number Publication date
US3849595A (en) 1974-11-19
JPS4953715A (ja) 1974-05-24

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