WO1995010138B1 - Audio signal processor - Google Patents
Audio signal processorInfo
- Publication number
- WO1995010138B1 WO1995010138B1 PCT/US1994/011234 US9411234W WO9510138B1 WO 1995010138 B1 WO1995010138 B1 WO 1995010138B1 US 9411234 W US9411234 W US 9411234W WO 9510138 B1 WO9510138 B1 WO 9510138B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- samples
- store
- analog
- audio signal
- audio
- Prior art date
Links
- 230000005236 sound signal Effects 0.000 title abstract 6
- 230000000694 effects Effects 0.000 claims abstract 3
- 241001342895 Chorus Species 0.000 abstract 1
- 230000003111 delayed Effects 0.000 abstract 1
- 238000002592 echocardiography Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Abstract
An audio signal processor (10) capable of both sampling and audio processing external audio signals is disclosed. The audio signal processor can sample an audio signal and store it in a fixed store (64) in a two-function memory (60) for later playback or manipulation. The processor can also audio process external signals in real time by splitting an incoming signal into two parts; processing one part such that it is time delayed and/or pitch shifted (62), or both, with respect to the unaltered part; and recombining the processed part and the unaltered part to achieve time delay effects such as flanging, chorus and echo. Moreover, the audio signal processor can output samples from the fixed store and real time processed signals simultaneously to achieve complex sound combinations and auditory effects.
Claims
1. A combined audio processor and sampler comprising: an analog input for receiving audio input signals to be processed; an analog-to-digital converter (ADC) for digitizing the audio input signals received from the analog input into samples; a two function memory for receiving the samples from the ADC having: a circulating store having a plurality of sequential locations for temporarily delaying the samples a predetermined amount, and a fixed store having independently addressable locations for storing the samples for playback; a digital-to-analog converter (DAC) for receiving the samples from the two function memory and converting them to analog output signals; a processing means for controlling manipulation of the samples, the processing means controlling the predetermined amount of delay imparted by the circulating store and selectively addressing the independently addressable locations in the fixed store; and, output means under the control of the processing means for selectively combining the audio input signals and the output of the DAC into a final output signal to achieve time delay effects.
2. A combined audio processor and sampler as defined in claim l wherein the processing means includes a microprocessor and a memory control module responsive to the microprocessor for controlling the two function memory. STATEMENT UNDER ARTICLE 19
The amendment reflects identical changes made to the claims during the prosecution of the priority application.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU79649/94A AU7964994A (en) | 1993-10-04 | 1994-10-04 | Audio signal processor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/131,780 US5469508A (en) | 1993-10-04 | 1993-10-04 | Audio signal processor |
| US131,780 | 1993-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1995010138A1 WO1995010138A1 (en) | 1995-04-13 |
| WO1995010138B1 true WO1995010138B1 (en) | 1995-05-26 |
Family
ID=22451001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/011234 WO1995010138A1 (en) | 1993-10-04 | 1994-10-04 | Audio signal processor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5469508A (en) |
| AU (1) | AU7964994A (en) |
| WO (1) | WO1995010138A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5793739A (en) * | 1994-07-15 | 1998-08-11 | Yamaha Corporation | Disk recording and sound reproducing device using pitch change and timing adjustment |
| US5826064A (en) * | 1996-07-29 | 1998-10-20 | International Business Machines Corp. | User-configurable earcon event engine |
| TW369746B (en) * | 1996-11-13 | 1999-09-11 | Sanyo Electric Co | Surround circuit |
| JP2000050182A (en) * | 1998-08-03 | 2000-02-18 | Japan Advanced Inst Of Science & Technology Hokuriku | Method for processing audio signal for a-v |
| US7570189B2 (en) * | 2002-06-27 | 2009-08-04 | Nxp B.V. | Radio frequency data capture |
| US6804504B1 (en) * | 2002-08-23 | 2004-10-12 | Innovative Electronic Designs, Inc. | Audio processing system |
| GB2393352A (en) * | 2002-09-23 | 2004-03-24 | Mitel Knowledge Corp | Speaker system with two enclosures having complementary frequency responses |
| WO2006102313A2 (en) * | 2005-03-18 | 2006-09-28 | The Trustees Of Columbia University In The City Of New York | Systems and methods for companding adc-dsp-dac combinations |
| CN101149918B (en) * | 2006-09-22 | 2012-03-28 | 鸿富锦精密工业（深圳）有限公司 | Voice treatment device with sing-practising function |
| JP4879043B2 (en) * | 2007-02-22 | 2012-02-15 | 富士通セミコンダクター株式会社 | AD conversion circuit and microcontroller |
| US8019078B2 (en) * | 2007-07-17 | 2011-09-13 | International Business Machines Corporation | Phone call mute notification |
| US8737645B2 (en) * | 2012-10-10 | 2014-05-27 | Archibald Doty | Increasing perceived signal strength using persistence of hearing characteristics |
| US9159310B2 (en) | 2012-10-19 | 2015-10-13 | The Tc Group A/S | Musical modification effects |
| CN106781806A (en) * | 2017-01-20 | 2017-05-31 | 中国人民解放军镇江船艇学院 | A kind of portable traffic skill training system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3749837A (en) * | 1972-05-02 | 1973-07-31 | J Doughty | Electronic musical tone modifier for musical instruments |
| US4000676A (en) * | 1974-09-20 | 1977-01-04 | Love David A | Electronic vibrato system |
| US4570523A (en) * | 1981-07-30 | 1986-02-18 | Nippon Gakki Seizo Kabushiki Kaisha | Reverberation tone generating apparatus |
| US4428270A (en) * | 1981-11-16 | 1984-01-31 | The Wurlitzer Company | Electronic vibrato or celeste |
| JPS60256198A (en) * | 1984-06-01 | 1985-12-17 | ヤマハ株式会社 | Effect applicator |
| US4754680A (en) * | 1985-09-10 | 1988-07-05 | Casio Computer Co., Ltd. | Overdubbing apparatus for electronic musical instrument |
| US4864625A (en) * | 1985-09-13 | 1989-09-05 | Casio Computer Co., Ltd. | Effector for electronic musical instrument |
| JPH07118840B2 (en) * | 1986-09-30 | 1995-12-18 | ヤマハ株式会社 | Playback characteristic control circuit |
| US4991218A (en) * | 1988-01-07 | 1991-02-05 | Yield Securities, Inc. | Digital signal processor for providing timbral change in arbitrary audio and dynamically controlled stored digital audio signals |
| JP2522529B2 (en) * | 1988-10-31 | 1996-08-07 | 株式会社東芝 | Sound effect device |
| US4937875A (en) * | 1989-03-28 | 1990-06-26 | Pioneer Electronic Corporation | Audio signal processing apparatus |
| US4933980A (en) * | 1989-05-01 | 1990-06-12 | The United States Of America As Represented By The Secretary Of The Army | Sound effects generator |
-
1993
- 1993-10-04 US US08/131,780 patent/US5469508A/en not_active Expired - Fee Related
-
1994
- 1994-10-04 WO PCT/US1994/011234 patent/WO1995010138A1/en active Application Filing
- 1994-10-04 AU AU79649/94A patent/AU7964994A/en not_active Abandoned
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