IT1014479B - PAR AUDIO SIGNAL PROCESSOR PARTICULARLY FOR INTER-PHONE SYSTEMS - Google Patents

PAR AUDIO SIGNAL PROCESSOR PARTICULARLY FOR INTER-PHONE SYSTEMS

Info

Publication number
IT1014479B
IT1014479B IT6915474A IT6915474A IT1014479B IT 1014479 B IT1014479 B IT 1014479B IT 6915474 A IT6915474 A IT 6915474A IT 6915474 A IT6915474 A IT 6915474A IT 1014479 B IT1014479 B IT 1014479B
Authority
IT
Italy
Prior art keywords
par
inter
audio signal
signal processor
phone systems
Prior art date
Application number
IT6915474A
Other languages
Italian (it)
Original Assignee
Secr Defence Brit
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 Secr Defence Brit filed Critical Secr Defence Brit
Application granted granted Critical
Publication of IT1014479B publication Critical patent/IT1014479B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT6915474A 1973-07-06 1974-07-05 PAR AUDIO SIGNAL PROCESSOR PARTICULARLY FOR INTER-PHONE SYSTEMS IT1014479B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3227273 1973-07-06

Publications (1)

Publication Number Publication Date
IT1014479B true IT1014479B (en) 1977-04-20

Family

ID=10336029

Family Applications (1)

Application Number Title Priority Date Filing Date
IT6915474A IT1014479B (en) 1973-07-06 1974-07-05 PAR AUDIO SIGNAL PROCESSOR PARTICULARLY FOR INTER-PHONE SYSTEMS

Country Status (4)

Country Link
DE (1) DE2432371A1 (en)
FR (1) FR2236320B3 (en)
IT (1) IT1014479B (en)
SE (1) SE7408878L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066878A (en) * 1976-03-29 1978-01-03 Miller Raymond M Time-domain filter for recursive type signals
FR2410923A1 (en) * 1977-08-18 1979-06-29 Dassault Electronique INSTALLATION OF TELEPHONE TRANSMISSION OF SPEECH BETWEEN INTERLOCUTES PLACED IN A NOISY ATMOSPHERE
FR2502370A1 (en) * 1981-03-18 1982-09-24 Trt Telecom Radio Electr NOISE REDUCTION DEVICE IN A SPEECH SIGNAL MELEUR OF NOISE
DE3629596A1 (en) * 1986-08-30 1988-03-03 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR DECOUPLING THE TRANSFER BRANCHES OF A HANDS-FREE UNIT
GB8823080D0 (en) * 1988-09-30 1988-11-09 Stc Plc Noise reduction in speech transmitter circuits

Also Published As

Publication number Publication date
FR2236320A1 (en) 1975-01-31
DE2432371A1 (en) 1975-02-27
FR2236320B3 (en) 1977-05-06
SE7408878L (en) 1975-01-07

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