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BE829537A - Procede et dispositif de transmission de signaux avec modulation par impulsions codees et avec reduction de redondance - Google Patents

Procede et dispositif de transmission de signaux avec modulation par impulsions codees et avec reduction de redondance

Info

Publication number
BE829537A
BE829537A BE156748A BE156748A BE829537A BE 829537 A BE829537 A BE 829537A BE 156748 A BE156748 A BE 156748A BE 156748 A BE156748 A BE 156748A BE 829537 A BE829537 A BE 829537A
Authority
BE
Belgium
Prior art keywords
signal transmission
pulse modulation
code pulse
redundancy reduction
redundancy
Prior art date
Application number
BE156748A
Other languages
English (en)
French (fr)
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
Publication of BE829537A publication Critical patent/BE829537A/xx

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)
BE156748A 1974-05-27 1975-05-27 Procede et dispositif de transmission de signaux avec modulation par impulsions codees et avec reduction de redondance BE829537A (fr)

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
BE829537A true BE829537A (fr) 1975-09-15

Family

ID=11204743

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (10)

Country Link
US (1) US4005274A (xx)
JP (1) JPS5129808A (xx)
AR (1) AR208911A1 (xx)
BE (1) BE829537A (xx)
DE (1) DE2523492A1 (xx)
ES (1) ES437780A1 (xx)
FR (1) FR2273412B1 (xx)
GB (1) GB1509233A (xx)
IT (1) IT1021020B (xx)
NL (1) NL7505563A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108694938A (zh) * 2017-03-31 2018-10-23 英特尔公司 用于在可穿戴设备上进行能量高效且低功率分布式自动语音辨识的系统和方法

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH604409A5 (xx) * 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
US4354057A (en) * 1980-04-08 1982-10-12 Bell Telephone Laboratories, Incorporated Predictive signal coding with partitioned quantization
USRE32124E (en) * 1980-04-08 1986-04-22 At&T Bell Laboratories Predictive signal coding with partitioned quantization
US4386237A (en) * 1980-12-22 1983-05-31 Intelsat NIC Processor using variable precision block quantization
DE3267481D1 (en) * 1982-02-09 1986-01-02 Ibm Method for multi-speed digital transmission and apparatus for carrying out said method
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
EP0379587B1 (en) * 1988-06-08 1993-12-08 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108694938A (zh) * 2017-03-31 2018-10-23 英特尔公司 用于在可穿戴设备上进行能量高效且低功率分布式自动语音辨识的系统和方法

Also Published As

Publication number Publication date
DE2523492A1 (de) 1975-12-11
US4005274A (en) 1977-01-25
NL7505563A (nl) 1975-12-01
IT1021020B (it) 1978-01-30
JPS5129808A (xx) 1976-03-13
GB1509233A (en) 1978-05-04
AR208911A1 (es) 1977-03-15
FR2273412A1 (xx) 1975-12-26
FR2273412B1 (xx) 1979-01-19
ES437780A1 (es) 1977-05-16

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