SE9501325D0 - audio Device - Google Patents

audio Device

Info

Publication number
SE9501325D0
SE9501325D0 SE9501325A SE9501325A SE9501325D0 SE 9501325 D0 SE9501325 D0 SE 9501325D0 SE 9501325 A SE9501325 A SE 9501325A SE 9501325 A SE9501325 A SE 9501325A SE 9501325 D0 SE9501325 D0 SE 9501325D0
Authority
SE
Sweden
Prior art keywords
microphone
voice
loudspeakers
signal processor
communicator
Prior art date
Application number
SE9501325A
Other languages
Swedish (sv)
Other versions
SE9501325L (en
SE520735C2 (en
Inventor
Stig Stuns
John-Erik Eriksson
Original Assignee
Konftel Ab
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 Konftel Ab filed Critical Konftel Ab
Priority to SE9501325A priority Critical patent/SE520735C2/en
Publication of SE9501325D0 publication Critical patent/SE9501325D0/en
Priority to SE9501681A priority patent/SE9501681D0/en
Priority to PCT/SE1996/000438 priority patent/WO1996032804A1/en
Priority to AU54109/96A priority patent/AU5410996A/en
Publication of SE9501325L publication Critical patent/SE9501325L/en
Publication of SE520735C2 publication Critical patent/SE520735C2/en

Links

Classifications

    • 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
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic System (AREA)
  • Stereophonic Arrangements (AREA)
  • Telephone Function (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

The device can record voices using an all-directional recording microphone (28) positioned centrally w.r.t. two loudspeakers (16). The loudspeakers surround the microphone in its immediate vicinity, and together with the microphone form a voice recording and voice replaying sound unit, which is connected to an adaptive signal processor. The appts. records and transmits voices and replays them in full duplex. There is also a voice communicator together with an adaptive signal processor (DSP), with an interface (47) for the communicator. The interface cancels echoes and acoustic feedback
SE9501325A 1995-04-07 1995-04-07 Full duplex voice recording and transmitting appts. esp. for telephone loudspeaker conference SE520735C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9501325A SE520735C2 (en) 1995-04-07 1995-04-07 Full duplex voice recording and transmitting appts. esp. for telephone loudspeaker conference
SE9501681A SE9501681D0 (en) 1995-04-07 1995-05-05 telecommunications device
PCT/SE1996/000438 WO1996032804A1 (en) 1995-04-07 1996-04-03 Device and method for voice conference communication
AU54109/96A AU5410996A (en) 1995-04-07 1996-04-03 Device and method for voice conference communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9501325A SE520735C2 (en) 1995-04-07 1995-04-07 Full duplex voice recording and transmitting appts. esp. for telephone loudspeaker conference

Publications (3)

Publication Number Publication Date
SE9501325D0 true SE9501325D0 (en) 1995-04-07
SE9501325L SE9501325L (en) 1996-10-08
SE520735C2 SE520735C2 (en) 2003-08-19

Family

ID=20397911

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9501325A SE520735C2 (en) 1995-04-07 1995-04-07 Full duplex voice recording and transmitting appts. esp. for telephone loudspeaker conference

Country Status (1)

Country Link
SE (1) SE520735C2 (en)

Also Published As

Publication number Publication date
SE9501325L (en) 1996-10-08
SE520735C2 (en) 2003-08-19

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Legal Events

Date Code Title Description
NUG Patent has lapsed