IL84337A - Method and apparatus for voiceband signal classification - Google Patents

Method and apparatus for voiceband signal classification

Info

Publication number
IL84337A
IL84337A IL84337A IL8433787A IL84337A IL 84337 A IL84337 A IL 84337A IL 84337 A IL84337 A IL 84337A IL 8433787 A IL8433787 A IL 8433787A IL 84337 A IL84337 A IL 84337A
Authority
IL
Israel
Prior art keywords
signal classification
voiceband signal
voiceband
classification
signal
Prior art date
Application number
IL84337A
Other languages
English (en)
Other versions
IL84337A0 (en
Original Assignee
American Telephone & Telegraph
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 American Telephone & Telegraph filed Critical American Telephone & Telegraph
Publication of IL84337A0 publication Critical patent/IL84337A0/xx
Publication of IL84337A publication Critical patent/IL84337A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Television Systems (AREA)
IL84337A 1986-11-06 1987-11-02 Method and apparatus for voiceband signal classification IL84337A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/927,506 US4815136A (en) 1986-11-06 1986-11-06 Voiceband signal classification

Publications (2)

Publication Number Publication Date
IL84337A0 IL84337A0 (en) 1988-04-29
IL84337A true IL84337A (en) 1991-05-12

Family

ID=25454827

Family Applications (1)

Application Number Title Priority Date Filing Date
IL84337A IL84337A (en) 1986-11-06 1987-11-02 Method and apparatus for voiceband signal classification

Country Status (7)

Country Link
US (1) US4815136A (xx)
EP (1) EP0266965B1 (xx)
JP (1) JPS63131650A (xx)
KR (1) KR910002328B1 (xx)
CA (1) CA1307342C (xx)
DE (1) DE3787249T2 (xx)
IL (1) IL84337A (xx)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004880A1 (en) * 1986-01-30 1987-08-13 Plessey Overseas Limited Analogue to digital conversion: method and apparatus therefor
US5280532A (en) * 1990-04-09 1994-01-18 Dsc Communications Corporation N:1 bit compression apparatus and method
US5157651A (en) * 1990-07-26 1992-10-20 General Datacomm, Inc. Apparatus and method for determining line rates
US5490199A (en) * 1992-02-21 1996-02-06 At&T Corp. Non-intrusive network-based analysis of facsimile transmissions
US5299257A (en) * 1992-02-21 1994-03-29 At&T Bell Laboratories Subscriber initiated non-intrusive network-based analysis of facsimile transmissions
US5579431A (en) * 1992-10-05 1996-11-26 Panasonic Technologies, Inc. Speech detection in presence of noise by determining variance over time of frequency band limited energy
US5617508A (en) * 1992-10-05 1997-04-01 Panasonic Technologies Inc. Speech detection device for the detection of speech end points based on variance of frequency band limited energy
US5442694A (en) * 1994-04-12 1995-08-15 Dialogic Corporation Ring tone detection for a telephone system
US5757867A (en) * 1995-03-30 1998-05-26 The United States Of America As Represented By The Secretary Of The Navy Digital mixing to baseband decimation filter
US5999898A (en) * 1996-06-20 1999-12-07 International Business Machines Corporation Voice/data discriminator
US6708146B1 (en) 1997-01-03 2004-03-16 Telecommunications Research Laboratories Voiceband signal classifier
US5949864A (en) * 1997-05-08 1999-09-07 Cox; Neil B. Fraud prevention apparatus and method for performing policing functions for telephone services
US6574321B1 (en) 1997-05-08 2003-06-03 Sentry Telecom Systems Inc. Apparatus and method for management of policies on the usage of telecommunications services
US6480823B1 (en) 1998-03-24 2002-11-12 Matsushita Electric Industrial Co., Ltd. Speech detection for noisy conditions
US20030086444A1 (en) * 2001-09-28 2003-05-08 Globespan Virata, Incorporated Voice/tone discriminator
JP2008538166A (ja) * 2005-01-21 2008-10-09 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ デジタルテレビ信号の存在を検出する方法及び機器
US7528751B2 (en) 2006-07-28 2009-05-05 Samsung Electro-Mechanics Systems, methods, and apparatuses for a long delay generation technique for spectrum-sensing of cognitive radios

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH635695A5 (de) * 1978-08-31 1983-04-15 Landis & Gyr Ag Detektor zur feststellung der anwesenheit mindestens eines elektrischen signals mit einer vorbestimmten charakteristik.
US4281218A (en) * 1979-10-26 1981-07-28 Bell Telephone Laboratories, Incorporated Speech-nonspeech detector-classifier
US4597107A (en) * 1983-04-01 1986-06-24 Psr Products, Inc. Modulation detector and classifier
GB2139052A (en) * 1983-04-20 1984-10-31 Philips Electronic Associated Apparatus for distinguishing between speech and certain other signals

Also Published As

Publication number Publication date
KR910002328B1 (ko) 1991-04-11
JPH0566057B2 (xx) 1993-09-21
EP0266965B1 (en) 1993-09-01
US4815136A (en) 1989-03-21
DE3787249D1 (de) 1993-10-07
CA1307342C (en) 1992-09-08
DE3787249T2 (de) 1994-03-31
KR880006861A (ko) 1988-07-25
EP0266965A3 (en) 1989-09-06
JPS63131650A (ja) 1988-06-03
EP0266965A2 (en) 1988-05-11
IL84337A0 (en) 1988-04-29

Similar Documents

Publication Publication Date Title
GB2189366B (en) Method and apparatus for conveying information signals
IL84338A0 (en) Method and apparatus for voiceband signal classification
EP0314312A3 (en) Method and apparatus for detecting inks
AU7164887A (en) Object detection method and apparatus employing electro- optics
EP0244217A3 (en) Process and apparatus
EP0300217A3 (en) Processing apparatus and method
ZA868350B (en) Apparatus and process for solids-fluid separation
GB2229536B (en) Signal processing apparatus and method
IL81864A (en) Signal processing receiver apparatus and method
EP0257660A3 (en) Method and apparatus for judging agglutination
GB2206213B (en) Sorting method and apparatus
EP0236073A3 (en) Gripper apparatus and method
IL84337A (en) Method and apparatus for voiceband signal classification
AU8144287A (en) Sorting apparatus and method
AU7120687A (en) Signalling method and apparatus
EP0206399A3 (en) Apparatus and process for solids-fluid separation
EP0269995A3 (en) Parallel data processing apparatus and method
EP0271922A3 (en) Process and apparatus for suspension polymerization
EP0257324A3 (en) Method and apparatus for processing waveform records
IL82107A0 (en) Method and apparatus for identifying particulate matter
ZA90765B (en) Signal processing apparatus and method
EP0239979A3 (en) Priority order determination method and apparatus therefor
GB9013398D0 (en) Signal processing apparatus and method
ZA884831B (en) Method and apparatus for photoepilation and electroepilation
GB2228158B (en) Detection method and apparatus

Legal Events

Date Code Title Description
KB Patent renewed
RH Patent void
KB Patent renewed