ES424492A1 - Un metodo y un aparato para la transmision en compresion enun sistema de transmision de voz por modulacion en delta, con compresion-expansion. - Google Patents

Un metodo y un aparato para la transmision en compresion enun sistema de transmision de voz por modulacion en delta, con compresion-expansion.

Info

Publication number
ES424492A1
ES424492A1 ES424492A ES424492A ES424492A1 ES 424492 A1 ES424492 A1 ES 424492A1 ES 424492 A ES424492 A ES 424492A ES 424492 A ES424492 A ES 424492A ES 424492 A1 ES424492 A1 ES 424492A1
Authority
ES
Spain
Prior art keywords
signal
encoder
background noise
reference signal
telephone system
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
Application number
ES424492A
Other languages
English (en)
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.)
Ericsson Australia Pty Ltd
Original Assignee
LM Ericsson Pty Ltd
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 LM Ericsson Pty Ltd filed Critical LM Ericsson Pty Ltd
Publication of ES424492A1 publication Critical patent/ES424492A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)
ES424492A 1973-03-21 1974-03-21 Un metodo y un aparato para la transmision en compresion enun sistema de transmision de voz por modulacion en delta, con compresion-expansion. Expired ES424492A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB268773 1973-03-21

Publications (1)

Publication Number Publication Date
ES424492A1 true ES424492A1 (es) 1976-06-01

Family

ID=3765655

Family Applications (1)

Application Number Title Priority Date Filing Date
ES424492A Expired ES424492A1 (es) 1973-03-21 1974-03-21 Un metodo y un aparato para la transmision en compresion enun sistema de transmision de voz por modulacion en delta, con compresion-expansion.

Country Status (14)

Country Link
US (1) US3995217A (es)
JP (1) JPS5027418A (es)
BE (1) BE812634A (es)
BR (1) BR7402222D0 (es)
CA (1) CA1064172A (es)
DE (1) DE2413679A1 (es)
DK (1) DK146330C (es)
ES (1) ES424492A1 (es)
FR (1) FR2222806B1 (es)
GB (1) GB1427459A (es)
HU (1) HU170812B (es)
IT (1) IT1007418B (es)
NL (1) NL7403838A (es)
SE (1) SE399159B (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190801A (en) * 1978-02-06 1980-02-26 Deltalab Research, Inc. Digital encoding circuitry
CN103344849B (zh) * 2013-05-31 2015-05-27 哈尔滨工业大学 一种获取随机解调硬件系统的感知矩阵的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL277910A (es) * 1961-05-02
US3500441A (en) * 1967-10-12 1970-03-10 Bell Telephone Labor Inc Delta modulation with discrete companding
US3609551A (en) * 1968-06-28 1971-09-28 Bell Telephone Labor Inc Discrete-continuous companding for a digital transmission system
US3582784A (en) * 1968-10-18 1971-06-01 Bell Telephone Labor Inc Delta modulation system
FR2098466A5 (es) * 1969-10-16 1972-03-10 Ibm France
FR2082740A5 (es) * 1970-03-25 1971-12-10 Trt Telecom Radio Electr
US3729678A (en) * 1971-07-20 1973-04-24 Philips Corp Pcm system including a pulse pattern analyzer

Also Published As

Publication number Publication date
HU170812B (hu) 1977-09-28
DK146330C (da) 1984-03-26
FR2222806B1 (es) 1977-10-07
BR7402222D0 (pt) 1974-12-03
GB1427459A (en) 1976-03-10
DE2413679A1 (de) 1974-10-10
DK146330B (da) 1983-09-05
FR2222806A1 (es) 1974-10-18
CA1064172A (en) 1979-10-09
BE812634A (fr) 1974-07-15
IT1007418B (it) 1976-10-30
SE399159B (sv) 1978-01-30
US3995217A (en) 1976-11-30
JPS5027418A (es) 1975-03-20
NL7403838A (es) 1974-09-24

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