IT1021020B - Sistema e dispositivi di comunica zione con segnali codificati p.c.m. a ridondanza ridotta - Google Patents

Sistema e dispositivi di comunica zione con segnali codificati p.c.m. a ridondanza ridotta

Info

Publication number
IT1021020B
IT1021020B IT23193/74A IT2319374A IT1021020B IT 1021020 B IT1021020 B IT 1021020B IT 23193/74 A IT23193/74 A IT 23193/74A IT 2319374 A IT2319374 A IT 2319374A IT 1021020 B IT1021020 B IT 1021020B
Authority
IT
Italy
Prior art keywords
devices
communication system
coded signals
reduced redundancy
redundancy
Prior art date
Application number
IT23193/74A
Other languages
English (en)
Italian (it)
Inventor
A Molinari
F Vagliani
Original Assignee
Telettra Lab Telefon
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 Telettra Lab Telefon filed Critical Telettra Lab Telefon
Priority to IT23193/74A priority Critical patent/IT1021020B/it
Priority to NL7505563A priority patent/NL7505563A/xx
Priority to ES437780A priority patent/ES437780A1/es
Priority to GB21437/75A priority patent/GB1509233A/en
Priority to JP50062051A priority patent/JPS5129808A/ja
Priority to FR7516294A priority patent/FR2273412B1/fr
Priority to AR258946A priority patent/AR208911A1/es
Priority to DE19752523492 priority patent/DE2523492A1/de
Priority to US05/580,914 priority patent/US4005274A/en
Priority to BE156748A priority patent/BE829537A/xx
Application granted granted Critical
Publication of IT1021020B publication Critical patent/IT1021020B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H04J3/1688—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers the demands of the users being taken into account after redundancy removal, e.g. by predictive coding, by variable sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H04B14/048—Non linear compression or expansion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
IT23193/74A 1974-05-27 1974-05-27 Sistema e dispositivi di comunica zione con segnali codificati p.c.m. a ridondanza ridotta IT1021020B (it)

Priority Applications (10)

Application Number Priority Date Filing Date Title
IT23193/74A IT1021020B (it) 1974-05-27 1974-05-27 Sistema e dispositivi di comunica zione con segnali codificati p.c.m. a ridondanza ridotta
NL7505563A NL7505563A (nl) 1974-05-27 1975-05-12 Kommunikatiestelsel en -inrichting met p.c.m.-gecodeerde signalen.
ES437780A ES437780A1 (es) 1974-05-27 1975-05-19 Perfeccionamientos en sistemas de comunicacion, con su dis- positivo correspondiente, para reducir la redundancia de se-nales codificadas p. c. m.
GB21437/75A GB1509233A (en) 1974-05-27 1975-05-20 Pcm telephone communication system
JP50062051A JPS5129808A (US20030157025A1-20030821-C00031.png) 1974-05-27 1975-05-26
FR7516294A FR2273412B1 (US20030157025A1-20030821-C00031.png) 1974-05-27 1975-05-26
AR258946A AR208911A1 (es) 1974-05-27 1975-05-26 Dispositivo para reducir la redundancia de senales codificadas pcm
DE19752523492 DE2523492A1 (de) 1974-05-27 1975-05-27 System und einrichtung zur verminderung der redundanz von pcm-kodierten signalen
US05/580,914 US4005274A (en) 1974-05-27 1975-05-27 Pulse-code modulation communication system
BE156748A BE829537A (fr) 1974-05-27 1975-05-27 Procede et dispositif de transmission de signaux avec modulation par impulsions codees et avec reduction de redondance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23193/74A IT1021020B (it) 1974-05-27 1974-05-27 Sistema e dispositivi di comunica zione con segnali codificati p.c.m. a ridondanza ridotta

Publications (1)

Publication Number Publication Date
IT1021020B true IT1021020B (it) 1978-01-30

Family

ID=11204743

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23193/74A IT1021020B (it) 1974-05-27 1974-05-27 Sistema e dispositivi di comunica zione con segnali codificati p.c.m. a ridondanza ridotta

Country Status (10)

Country Link
US (1) US4005274A (US20030157025A1-20030821-C00031.png)
JP (1) JPS5129808A (US20030157025A1-20030821-C00031.png)
AR (1) AR208911A1 (US20030157025A1-20030821-C00031.png)
BE (1) BE829537A (US20030157025A1-20030821-C00031.png)
DE (1) DE2523492A1 (US20030157025A1-20030821-C00031.png)
ES (1) ES437780A1 (US20030157025A1-20030821-C00031.png)
FR (1) FR2273412B1 (US20030157025A1-20030821-C00031.png)
GB (1) GB1509233A (US20030157025A1-20030821-C00031.png)
IT (1) IT1021020B (US20030157025A1-20030821-C00031.png)
NL (1) NL7505563A (US20030157025A1-20030821-C00031.png)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH604409A5 (US20030157025A1-20030821-C00031.png) * 1977-05-17 1978-09-15 Landis & Gyr Ag
JPS5523603A (en) * 1978-06-22 1980-02-20 Nec Corp Method and apparatus for coding and decoding of telephone signal
CA1152650A (en) * 1979-02-27 1983-08-23 Ernst A. Munter Pcm and pam conversion circuit including signal level variation on the pcm portion of the circuit
FR2463549A1 (fr) * 1979-08-10 1981-02-20 Telecommunications Sa Dispositif de reduction du debit numerique d'informations codees
IT1128762B (it) * 1980-02-20 1986-06-04 Cselt Centro Studi Lab Telecom Circuito per diagnosi di reti di connessione pcm
USRE32124E (en) * 1980-04-08 1986-04-22 At&T Bell Laboratories Predictive signal coding with partitioned quantization
US4354057A (en) * 1980-04-08 1982-10-12 Bell Telephone Laboratories, Incorporated Predictive signal coding with partitioned quantization
US4386237A (en) * 1980-12-22 1983-05-31 Intelsat NIC Processor using variable precision block quantization
EP0085820B1 (fr) * 1982-02-09 1985-11-21 International Business Machines Corporation Procédé de transmission numérique multi-vitesses et dispositif de mise en oeuvre dudit procédé
US4481659A (en) * 1982-02-11 1984-11-06 Universite De Sherbrooke Apparatus and method of reducing the bit rate of PCM speech
US4513426A (en) * 1982-12-20 1985-04-23 At&T Bell Laboratories Adaptive differential pulse code modulation
DE3411962A1 (de) * 1983-03-31 1984-10-31 Sansui Electric Co., Ltd., Tokio/Tokyo Datenuebertragungseinrichtung
FR2545301B1 (fr) * 1983-04-29 1986-07-25 Telephonie Ind Commerciale Procede de compression-decompression d'un signal de type vocal
US4845499A (en) * 1987-11-02 1989-07-04 Ag Communication Systems Corporation Method for generating PCM logarithmic values from linear values
WO1989012292A1 (en) * 1988-06-08 1989-12-14 Fujitsu Limited Encoder/decoder apparatus
JP3531526B2 (ja) * 1999-05-13 2004-05-31 日本電気株式会社 通信システム
US10373630B2 (en) * 2017-03-31 2019-08-06 Intel Corporation Systems and methods for energy efficient and low power distributed automatic speech recognition on wearable devices
US11784731B2 (en) * 2021-03-09 2023-10-10 Apple Inc. Multi-phase-level signaling to improve data bandwidth over lossy channels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471648A (en) * 1966-07-28 1969-10-07 Bell Telephone Labor Inc Vocoder utilizing companding to reduce background noise caused by quantizing errors
US3711650A (en) * 1970-10-26 1973-01-16 Logicon Inc Adaptive pulse code modulation system
US3806806A (en) * 1972-11-20 1974-04-23 Bell Telephone Labor Inc Adaptive data modulator
US3815124A (en) * 1973-01-16 1974-06-04 Westinghouse Electric Corp Analog to digital converter

Also Published As

Publication number Publication date
AR208911A1 (es) 1977-03-15
BE829537A (fr) 1975-09-15
GB1509233A (en) 1978-05-04
JPS5129808A (US20030157025A1-20030821-C00031.png) 1976-03-13
FR2273412B1 (US20030157025A1-20030821-C00031.png) 1979-01-19
ES437780A1 (es) 1977-05-16
NL7505563A (nl) 1975-12-01
FR2273412A1 (US20030157025A1-20030821-C00031.png) 1975-12-26
DE2523492A1 (de) 1975-12-11
US4005274A (en) 1977-01-25

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