CA2098319A1 - Signal processor for recreating original audio signals - Google Patents
Signal processor for recreating original audio signalsInfo
- 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
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.
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.
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)
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)
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 |
EP0951799A1 (en) * | 1997-11-07 | 1999-10-27 | Koninklijke Philips Electronics N.V. | Audio system comprising audio signal processing circuit |
Family Cites Families (4)
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 |
-
1991
- 1991-12-13 WO PCT/US1991/009375 patent/WO1992010918A1/en active Application Filing
- 1991-12-13 AU AU91160/91A patent/AU9116091A/en not_active Abandoned
- 1991-12-13 CA CA002098319A patent/CA2098319C/en not_active Expired - Fee Related
Cited By (2)
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 |
---|---|
AU9116091A (en) | 1992-07-08 |
CA2098319C (en) | 2000-01-25 |
WO1992010918A1 (en) | 1992-06-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed | ||
MKLA | Lapsed |
Effective date: 20041213 |