EP0337868A2 - Verfahren und Einrichtung zur Signalunterscheidung - Google Patents

Verfahren und Einrichtung zur Signalunterscheidung Download PDF

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Publication number
EP0337868A2
EP0337868A2 EP89400978A EP89400978A EP0337868A2 EP 0337868 A2 EP0337868 A2 EP 0337868A2 EP 89400978 A EP89400978 A EP 89400978A EP 89400978 A EP89400978 A EP 89400978A EP 0337868 A2 EP0337868 A2 EP 0337868A2
Authority
EP
European Patent Office
Prior art keywords
signal
amplitude
distribution
during
input signal
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.)
Granted
Application number
EP89400978A
Other languages
English (en)
French (fr)
Other versions
EP0337868B1 (de
EP0337868A3 (en
Inventor
Michel Ruiz
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.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
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 Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Publication of EP0337868A2 publication Critical patent/EP0337868A2/de
Publication of EP0337868A3 publication Critical patent/EP0337868A3/fr
Application granted granted Critical
Publication of EP0337868B1 publication Critical patent/EP0337868B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals

Definitions

  • the invention also provides a device making it possible to implement the above-defined method, comprising: - means for sampling the input signal, multi-channel analysis means memorizing the distribution of the amplitudes of the signal supplied by the sampling means during a determined time interval, and - calculation means making it possible to compare the distribution stored by the multi-channel analysis means over two successive time intervals and to issue an alarm signal when the comparison reveals the stationary nature of the input signal.
  • the corresponding channel 22 is applied to a digital data decoder 24 providing the digital value of the amplitude of the samples in a form compatible with that provided by the analog / digital converter (CAN) 18.
  • a digital multiplexer 26 receives the digital output signals from the CAN 18 and from the decoder 24 and supplies them on a common output 28. This digital multiplexer receives control signals on the one hand from the sequencer 20, on the other hand part of the decoder 24 which performs clock recovery for this purpose. If the signals to be monitored are all analog, it is possible to dispense with components 24 and 26.
  • a first embodiment using this approach consists in programming the computer for: 1 / Determine the maximum value A j taken by the signal in the time interval ⁇ t j and the distribution function F j (X) of the amplitude, i.e. the probability P for a sample of the signal has an amplitude whose value X is less than a given reference value x, which can be fixed once and for all or calculated over each time interval.
  • the distribution functions F j + 1 and F j are compared. If the absolute value of difference between them (or between their representations in the form of percentages of time) is less than a determined threshold, the computer signals a fault (indication of pre-alarm). Expressed as a percentage of time, the threshold can often be 0.5%. However, it may be necessary to increase it in an environment of impulse noise up to approximately 2% to avoid absence of detection.
  • the computer proceeds to the processing of the following records to calculate F j + 1 and F j + 2 .
  • the decision criterion is twofold and it is represented by the flowchart:
  • a second embodiment making it possible to reduce the calculation time consists in calculating the percentage of time during which X has been greater than the value x over the time interval ⁇ t.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
EP19890400978 1988-04-12 1989-04-10 Verfahren und Einrichtung zur Signalunterscheidung Expired - Lifetime EP0337868B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8804824 1988-04-12
FR8804824A FR2629964B1 (fr) 1988-04-12 1988-04-12 Procede et dispositif de discrimination de signal

Publications (3)

Publication Number Publication Date
EP0337868A2 true EP0337868A2 (de) 1989-10-18
EP0337868A3 EP0337868A3 (en) 1990-10-24
EP0337868B1 EP0337868B1 (de) 1993-12-15

Family

ID=9365229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890400978 Expired - Lifetime EP0337868B1 (de) 1988-04-12 1989-04-10 Verfahren und Einrichtung zur Signalunterscheidung

Country Status (3)

Country Link
EP (1) EP0337868B1 (de)
DE (1) DE68911355T2 (de)
FR (1) FR2629964B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027543A3 (en) * 1996-12-18 1998-10-08 Interval Research Corp Multi-feature speech/music discrimination system
WO2000047014A1 (en) * 1999-02-05 2000-08-10 The University Of Melbourne Adaptive dynamic range optimisation sound processor
US7366315B2 (en) 1999-02-05 2008-04-29 Hearworks Pty, Limited Adaptive dynamic range optimization sound processor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1044353B (it) * 1975-07-03 1980-03-20 Telettra Lab Telefon Metodo e dispositivo per il rico noscimento della presenza e.o assenza di segnale utile parola parlato su linee foniche canali fonici
JPS5876899A (ja) * 1981-10-31 1983-05-10 株式会社東芝 音声区間検出装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998027543A3 (en) * 1996-12-18 1998-10-08 Interval Research Corp Multi-feature speech/music discrimination system
US6570991B1 (en) 1996-12-18 2003-05-27 Interval Research Corporation Multi-feature speech/music discrimination system
WO2000047014A1 (en) * 1999-02-05 2000-08-10 The University Of Melbourne Adaptive dynamic range optimisation sound processor
AU761865B2 (en) * 1999-02-05 2003-06-12 Hearworks Pty Ltd Adaptive dynamic range optimisation sound processor
US6731767B1 (en) 1999-02-05 2004-05-04 The University Of Melbourne Adaptive dynamic range of optimization sound processor
US7366315B2 (en) 1999-02-05 2008-04-29 Hearworks Pty, Limited Adaptive dynamic range optimization sound processor
US7978868B2 (en) 1999-02-05 2011-07-12 Cochlear Limited Adaptive dynamic range optimization sound processor

Also Published As

Publication number Publication date
FR2629964A1 (fr) 1989-10-13
EP0337868B1 (de) 1993-12-15
DE68911355D1 (de) 1994-01-27
EP0337868A3 (en) 1990-10-24
FR2629964B1 (fr) 1991-03-08
DE68911355T2 (de) 1994-07-21

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