FR2445660B1 - - Google Patents

Info

Publication number
FR2445660B1
FR2445660B1 FR7836709A FR7836709A FR2445660B1 FR 2445660 B1 FR2445660 B1 FR 2445660B1 FR 7836709 A FR7836709 A FR 7836709A FR 7836709 A FR7836709 A FR 7836709A FR 2445660 B1 FR2445660 B1 FR 2445660B1
Authority
FR
France
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
FR7836709A
Other versions
FR2445660A1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PISSARD ANDRE
Original Assignee
PISSARD ANDRE
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 PISSARD ANDRE filed Critical PISSARD ANDRE
Priority to FR7836709A priority Critical patent/FR2445660A1/fr
Priority to US06/103,582 priority patent/US4319082A/en
Priority to CA000342579A priority patent/CA1155226A/fr
Priority to JP16910279A priority patent/JPS5592049A/ja
Publication of FR2445660A1 publication Critical patent/FR2445660A1/fr
Application granted granted Critical
Publication of FR2445660B1 publication Critical patent/FR2445660B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/066—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM]
    • H04B14/068—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM] with adaptive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/04—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM]
    • H03M3/042—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM] with adaptable step size, e.g. adaptive differential pulse code modulation [ADPCM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands
FR7836709A 1978-12-28 1978-12-28 Procede et circuit de transmission de type mic differentiel a prediction adaptive, utilisant un filtrage par sous-bandes et une analyse spectrale Granted FR2445660A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7836709A FR2445660A1 (fr) 1978-12-28 1978-12-28 Procede et circuit de transmission de type mic differentiel a prediction adaptive, utilisant un filtrage par sous-bandes et une analyse spectrale
US06/103,582 US4319082A (en) 1978-12-28 1979-12-14 Adaptive prediction differential-PCM transmission method and circuit using filtering by sub-bands and spectral analysis
CA000342579A CA1155226A (fr) 1978-12-28 1979-12-24 Methode et circuit de transmission a modulation differentielle par impulsions et codage avec prediction utilisant un filtrage par sous-bandes et par analyse spectrale
JP16910279A JPS5592049A (en) 1978-12-28 1979-12-25 Adaptive prenotice pcm transmitting method and circuit utilizing filter ring by sub band and spectrum analysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7836709A FR2445660A1 (fr) 1978-12-28 1978-12-28 Procede et circuit de transmission de type mic differentiel a prediction adaptive, utilisant un filtrage par sous-bandes et une analyse spectrale

Publications (2)

Publication Number Publication Date
FR2445660A1 FR2445660A1 (fr) 1980-07-25
FR2445660B1 true FR2445660B1 (fr) 1981-02-27

Family

ID=9216676

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836709A Granted FR2445660A1 (fr) 1978-12-28 1978-12-28 Procede et circuit de transmission de type mic differentiel a prediction adaptive, utilisant un filtrage par sous-bandes et une analyse spectrale

Country Status (4)

Country Link
US (1) US4319082A (fr)
JP (1) JPS5592049A (fr)
CA (1) CA1155226A (fr)
FR (1) FR2445660A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2481026B1 (fr) * 1980-04-21 1984-06-15 France Etat
NL8105196A (nl) * 1981-11-17 1983-06-16 Philips Nv Differentieel pulscode modulatie overdrachtstelsel.
US4501001A (en) * 1982-11-04 1985-02-19 Communications Satellite Corporation Variable slope delta coding processor using adaptive prediction
US4571737A (en) * 1982-12-10 1986-02-18 Nec Corporation Adaptive differential pulse code modulation decoding circuit
US4516241A (en) * 1983-07-11 1985-05-07 At&T Bell Laboratories Bit compression coding with embedded signaling
CA1208789A (fr) * 1983-11-25 1986-07-29 Peter E. Chow Codeur-decodeur mic differentiel adaptatif a reperage ameliore
IT1184023B (it) * 1985-12-17 1987-10-22 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per la codifica e decodifica del segnale vocale mediante analisi a sottobande e quantizzazione vettorariale con allocazione dinamica dei bit di codifica
IL80103A0 (en) * 1986-09-21 1987-01-30 Eci Telecom Limited Adaptive differential pulse code modulation(adpcm)system
US4792787A (en) * 1987-02-04 1988-12-20 The United States Of America As Represented By The Secretary Of The Navy Wide dynamic range analog-to-digital converter using linear prediction
FR2628589B1 (fr) * 1988-03-14 1994-03-04 Etat Francais Codeur differentiel a filtre predicteur auto-adaptatif et decodeur utilisable en liaison avec un tel codeur
US4979188A (en) * 1988-04-29 1990-12-18 Motorola, Inc. Spectrally efficient method for communicating an information signal
KR900015473A (ko) * 1989-03-02 1990-10-27 하라 레이노스께 음성 신호의 코딩 방법
US5083310A (en) * 1989-11-14 1992-01-21 Apple Computer, Inc. Compression and expansion technique for digital audio data
FR2722631B1 (fr) * 1994-07-13 1996-09-20 France Telecom Etablissement P Procede et systeme de filtrage adaptatif par egalisation aveugle d'un signal telephonique numerique et leurs applications
US20010040927A1 (en) * 2000-02-17 2001-11-15 Chu Peter L. Adaptive differential pulse code modulation system and method utilizing whitening filter for updating of predictor coefficients
FR2834563B1 (fr) * 2002-01-08 2004-04-02 Thales Sa Procede de suppression de signaux radioelectriques pulses et dispositif de mise en oeuvre du procede

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026375A (en) * 1958-05-09 1962-03-20 Bell Telephone Labor Inc Transmission of quantized signals
NL165014C (nl) * 1973-09-03 1981-02-16 Philips Nv Transmissiestelsel met een zender en een ontvanger voor het met behulp van een pulscode overdragen van informatiesignalen.
US4017849A (en) * 1975-08-28 1977-04-12 Bell Telephone Laboratories, Incorporated Apparatus for analog to digital conversion
US3973081A (en) * 1975-09-12 1976-08-03 Trw Inc. Feedback residue compression for digital speech systems
US4125861A (en) * 1977-08-18 1978-11-14 Bell Telephone Laboratories, Incorporated Video signal encoding

Also Published As

Publication number Publication date
JPS5592049A (en) 1980-07-12
CA1155226A (fr) 1983-10-11
FR2445660A1 (fr) 1980-07-25
US4319082A (en) 1982-03-09

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Legal Events

Date Code Title Description
ST Notification of lapse