CA2098319A1 - Signal processor for recreating original audio signals - Google Patents

Signal processor for recreating original audio signals

Info

Publication number
CA2098319A1
CA2098319A1 CA2098319A CA2098319A CA2098319A1 CA 2098319 A1 CA2098319 A1 CA 2098319A1 CA 2098319 A CA2098319 A CA 2098319A CA 2098319 A CA2098319 A CA 2098319A CA 2098319 A1 CA2098319 A1 CA 2098319A1
Authority
CA
Canada
Prior art keywords
signal processor
audio signals
original audio
audio signal
phase
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
CA2098319A
Other languages
French (fr)
Other versions
CA2098319C (en
Inventor
Eldon A. Byrd
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2098319A1 publication Critical patent/CA2098319A1/en
Application granted granted Critical
Publication of CA2098319C publication Critical patent/CA2098319C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

An audio signal processor (10, 12, 14) is disclosed for correcting harmonic and phase inaccuracies caused by the transduction, recording and playback of live audio signals. Operational amplifiers with fast slew rates and large bandwiths are used to implement a simple but effective circuit that can be reduced to a single chip.
Signal phase is continuously and automatically shifted as a logarithmic function of frequency to compensate for differences in propagation velocities, thereby reducing the spatial smear that is inherent in conventional loudspeaker designs. Harmonic frequencies present during a live performance are regenerated by the signal processor to restore realism to the reproduced audio signal.
CA002098319A 1990-12-14 1991-12-13 Signal processor for recreating original audio signals Expired - Fee Related CA2098319C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US62776790A 1990-12-14 1990-12-14
US627,767 1990-12-14
US79390891A 1991-11-20 1991-11-20
US07/793,908 1991-11-20
PCT/US1991/009375 WO1992010918A1 (en) 1990-12-14 1991-12-13 Signal processor for recreating original audio signals

Publications (2)

Publication Number Publication Date
CA2098319A1 true CA2098319A1 (en) 1993-05-21
CA2098319C CA2098319C (en) 2000-01-25

Family

ID=27090523

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002098319A Expired - Fee Related CA2098319C (en) 1990-12-14 1991-12-13 Signal processor for recreating original audio signals

Country Status (3)

Country Link
AU (1) AU9116091A (en)
CA (1) CA2098319C (en)
WO (1) WO1992010918A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3106030A1 (en) 2020-01-06 2021-07-09 Innovation Electro Acoustique Method and associated device for transforming characteristics of an audio signal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5425106A (en) * 1993-06-25 1995-06-13 Hda Entertainment, Inc. Integrated circuit for audio enhancement system
FR2751828A1 (en) * 1996-07-24 1998-01-30 Guisto Marc Albert Surround sound decoder converter system for home cinemas
WO1999025150A1 (en) * 1997-11-07 1999-05-20 Koninklijke Philips Electronics N.V. Audio system comprising audio signal processing circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4706287A (en) * 1984-10-17 1987-11-10 Kintek, Inc. Stereo generator
JPS61281799A (en) * 1985-06-07 1986-12-12 Dainabekutaa Kk Sound signal reproducing system
JP2536044Y2 (en) * 1986-09-19 1997-05-21 パイオニア株式会社 Binaural correlation coefficient correction device
JPS63224599A (en) * 1987-03-13 1988-09-19 Asa Plan:Kk Stereo processing unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3106030A1 (en) 2020-01-06 2021-07-09 Innovation Electro Acoustique Method and associated device for transforming characteristics of an audio signal
WO2021140089A1 (en) 2020-01-06 2021-07-15 Innovation Electro Acoustique Method and associated device for transforming characteristics of an audio signal

Also Published As

Publication number Publication date
WO1992010918A1 (en) 1992-06-25
CA2098319C (en) 2000-01-25
AU9116091A (en) 1992-07-08

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20041213