WO2000057673A1 - Filtre a elimination de bande - Google Patents

Filtre a elimination de bande Download PDF

Info

Publication number
WO2000057673A1
WO2000057673A1 PCT/EP2000/001907 EP0001907W WO0057673A1 WO 2000057673 A1 WO2000057673 A1 WO 2000057673A1 EP 0001907 W EP0001907 W EP 0001907W WO 0057673 A1 WO0057673 A1 WO 0057673A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio signal
audio
listener
bass
signal
Prior art date
Application number
PCT/EP2000/001907
Other languages
English (en)
Inventor
Ronaldus M. Aarts
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to KR1020007013188A priority Critical patent/KR20010043780A/ko
Priority to JP2000607443A priority patent/JP2002540697A/ja
Priority to EP00909316A priority patent/EP1080607A1/fr
Publication of WO2000057673A1 publication Critical patent/WO2000057673A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups
    • H04R2430/03—Synergistic effects of band splitting and sub-band processing

Definitions

  • the invention relates to an audio system as described in the preamble of claim 1.
  • the invention further relates to bass stop filter means.
  • An object of the invention is to improve the received audio signals in cases where the low frequency signals may not be supplied to the loudspeakers.
  • a first aspect of the invention provides an audio system as defined in claim 1.
  • the invention is based on the recognition that in cases where the really low frequency signals are not allowed to be supplied to the loudspeakers, for example, because people living in the neighborhood (the non-voluntary listeners) do not want to hear those bass signals it is possible to block these really low frequency signals and at the same time by using the ultra bass feature to give the people who are listening (the voluntary listeners) to the audio signals the perception that the bass signals are good.
  • An embodiment of an audio signal according to the invention comprises the features of claim 2.
  • FIG. 1 shows a block schematic example of an audio system of the invention.
  • the figure shows a schematic example of an audio system AS.
  • the audio system receives an audio signal.
  • This audio signal is supplied to enhancing means EM.
  • the enhancing means comprise band pass filter means BPF for selecting a part of the audio signal (the low frequency part).
  • the output of the band pass filter means is coupled with a so-called non-linear device (for example a harmonic generator or integrator etc).
  • the non-linear device creates harmonics of the signals, which are supplied by the band pass filter.
  • the output of the non-linear device is supplied to a low pass filter for filtering out the higher frequency components.
  • the output signal of the enhancing means is supplied to summing means SUM.
  • the summing means receives a signal from band stop filter means BSF which band stop filter means filter out the low frequency components of the input audio signal for example.
  • the output of the summing means SUM is supplied to the output O of the audio system.
  • the output O can be coupled to loudspeaker means, etc.
  • the enhancing means EM can for example be implemented as described in EP Application No. 98202998.5 (Applicants reference PHN17'.092), which document and its corresponding applications is herewith incorporated by reference.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

Des signaux audio de basse fréquence peuvent gêner des voisins (auditeur non volontaire) de l'auditeur (volontaire). Afin de palier à ce problème, il existe des filtres à élimination de bande, mais l'élimination des signaux audio dans la bande de fréquence diminue la qualité de la perception pour l'auditeur. La présente invention permet de résoudre ce problème au moyen d'une combinaison de moyens d'amélioration afin d'obtenir les dites ultra-basses, à l'aide du filtre à élimination.
PCT/EP2000/001907 1999-03-24 2000-03-06 Filtre a elimination de bande WO2000057673A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020007013188A KR20010043780A (ko) 1999-03-24 2000-03-06 오디오 시스템 및 대역 저지 필터
JP2000607443A JP2002540697A (ja) 1999-03-24 2000-03-06 帯域消去フィルタ
EP00909316A EP1080607A1 (fr) 1999-03-24 2000-03-06 Filtre a elimination de bande

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99200907.6 1999-03-24
EP99200907 1999-03-24

Publications (1)

Publication Number Publication Date
WO2000057673A1 true WO2000057673A1 (fr) 2000-09-28

Family

ID=8240018

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/001907 WO2000057673A1 (fr) 1999-03-24 2000-03-06 Filtre a elimination de bande

Country Status (5)

Country Link
EP (1) EP1080607A1 (fr)
JP (1) JP2002540697A (fr)
KR (1) KR20010043780A (fr)
CN (1) CN1296722A (fr)
WO (1) WO2000057673A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982404A1 (fr) * 2011-11-07 2013-05-10 Arkamys Procede de reduction de vibrations parasites d'un environnement d'un haut-parleur permettant de conserver la perception des basses frequences du signal a diffuser et dispositif de traitement associe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101800923B (zh) * 2009-06-08 2013-12-11 瑞声声学科技(深圳)有限公司 抑制振膜第二共振模态的装置及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546619A2 (fr) * 1991-12-09 1993-06-16 Koninklijke Philips Electronics N.V. Circuit pour mélanger et doubler les basses fréquences audio
WO1997042789A1 (fr) * 1996-05-08 1997-11-13 Philips Electronics N.V. Circuit, systeme audio et procede de traitement de signaux et generateur d'harmoniques
WO1998046044A1 (fr) * 1997-04-04 1998-10-15 K.S. Waves Ltd. Appareil et procede permettant de renforcer les basses
WO1999008380A1 (fr) * 1997-08-08 1999-02-18 Hearing Enhancement Company, L.L.C. Systeme et procede perfectionnes pour ameliorer l'ecoute

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0546619A2 (fr) * 1991-12-09 1993-06-16 Koninklijke Philips Electronics N.V. Circuit pour mélanger et doubler les basses fréquences audio
WO1997042789A1 (fr) * 1996-05-08 1997-11-13 Philips Electronics N.V. Circuit, systeme audio et procede de traitement de signaux et generateur d'harmoniques
WO1998046044A1 (fr) * 1997-04-04 1998-10-15 K.S. Waves Ltd. Appareil et procede permettant de renforcer les basses
WO1999008380A1 (fr) * 1997-08-08 1999-02-18 Hearing Enhancement Company, L.L.C. Systeme et procede perfectionnes pour ameliorer l'ecoute

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982404A1 (fr) * 2011-11-07 2013-05-10 Arkamys Procede de reduction de vibrations parasites d'un environnement d'un haut-parleur permettant de conserver la perception des basses frequences du signal a diffuser et dispositif de traitement associe
WO2013068359A1 (fr) * 2011-11-07 2013-05-16 Arkamys Procede de reduction de vibrations parasites d'un environnement d'un haut-parleur et dispositif de traitement associe
US9443502B2 (en) 2011-11-07 2016-09-13 Arkamys Method for reducing parasitic vibrations of a loudspeaker environment and associated processing device

Also Published As

Publication number Publication date
JP2002540697A (ja) 2002-11-26
KR20010043780A (ko) 2001-05-25
CN1296722A (zh) 2001-05-23
EP1080607A1 (fr) 2001-03-07

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